/* ============================================================
   bf-binance.com — CoinView / 币视
   Sky Blue #0ea5e9 + Pink #ec4899 | Plus Jakarta Sans
   ============================================================ */

/* ── Reset & Base ─────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:hidden}
body{font-family:'Plus Jakarta Sans','PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans SC',sans-serif;font-size:16px;line-height:1.7;color:#1c1917;background:#fafaf9;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul,ol{list-style:none}
button{cursor:pointer;border:none;background:none;font:inherit;color:inherit}
h1,h2,h3,h4,h5,h6{line-height:1.3;font-weight:700}
h1{font-size:2rem}
h2{font-size:1.5rem}
h3{font-size:1.2rem}

/* ── Container ────────────────────────────────────────────── */
.container{max-width:1140px;margin:0 auto;padding:0 20px}

/* ── Buttons ──────────────────────────────────────────────── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:12px 28px;border-radius:50px;font-weight:600;font-size:.95rem;transition:all .25s;white-space:nowrap}
.btn--primary{background:#0ea5e9;color:#fff}
.btn--primary:hover{background:#0284c7;transform:translateY(-1px);box-shadow:0 4px 14px rgba(14,165,233,.35)}
.btn--accent{background:linear-gradient(135deg,#0ea5e9,#ec4899);color:#fff}
.btn--accent:hover{opacity:.9;transform:translateY(-1px);box-shadow:0 4px 14px rgba(236,72,153,.3)}
.btn--outline{border:2px solid #e7e5e4;color:#1c1917;background:transparent}
.btn--outline:hover{border-color:#0ea5e9;color:#0ea5e9}
.btn--outline-white{border:2px solid rgba(255,255,255,.5);color:#fff;background:transparent}
.btn--outline-white:hover{background:rgba(255,255,255,.15);border-color:#fff}
.btn--sm{padding:8px 20px;font-size:.85rem}
.btn--ghost{color:#0ea5e9;padding:8px 0}
.btn--ghost:hover{color:#0284c7}

/* ── Reading Progress Bar ─────────────────────────────────── */
.reading-progress{position:fixed;top:0;left:0;width:0;height:3px;background:linear-gradient(90deg,#0ea5e9,#ec4899);z-index:9999;transition:width .1s linear}

/* ── Top Gradient Bar ─────────────────────────────────────── */
.top-bar{height:4px;background:linear-gradient(90deg,#0ea5e9,#a855f7,#ec4899);position:sticky;top:0;z-index:1001}

/* ── Header ───────────────────────────────────────────────── */
.header{position:sticky;top:4px;z-index:1000;background:rgba(255,255,255,.85);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:all .3s}
.header--solid{background:#fff;border-bottom-color:#e7e5e4;box-shadow:0 1px 8px rgba(0,0,0,.06)}
.header__inner{display:flex;align-items:center;justify-content:space-between;height:60px}
.header__brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.1rem}
.header__logo{width:36px;height:36px;border-radius:8px;background:linear-gradient(135deg,#0ea5e9,#ec4899);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:.85rem;letter-spacing:1px}
.header__nav{display:flex;align-items:center;gap:28px}
.header__link{font-size:.9rem;font-weight:500;color:#78716c;transition:color .2s}
.header__link:hover,.header__link--active{color:#0ea5e9}
.header__actions{display:flex;align-items:center;gap:12px}
.header__cta{display:none}
.header__lang{position:relative}
.header__lang-btn{display:flex;align-items:center;gap:4px;padding:6px 10px;border-radius:6px;font-size:.8rem;font-weight:600;color:#78716c;transition:all .2s}
.header__lang-btn:hover{color:#0ea5e9;background:rgba(14,165,233,.06)}
.header__lang-drop{position:absolute;top:100%;right:0;margin-top:6px;background:#fff;border:1px solid #e7e5e4;border-radius:10px;box-shadow:0 8px 24px rgba(0,0,0,.1);min-width:100px;opacity:0;visibility:hidden;transform:translateY(4px);transition:all .2s;z-index:100}
.header__lang:hover .header__lang-drop{opacity:1;visibility:visible;transform:translateY(0)}
.header__lang-item{display:block;padding:8px 16px;font-size:.85rem;font-weight:500;color:#44403c;transition:all .15s}
.header__lang-item:hover{background:#f5f5f4;color:#0ea5e9}
.header__lang-item:first-child{border-radius:10px 10px 0 0}
.header__lang-item:last-child{border-radius:0 0 10px 10px}
.header__lang-item--active{color:#0ea5e9;font-weight:700}
.header__hamburger{display:none;flex-direction:column;gap:5px;padding:6px}
.header__hamburger span{display:block;width:22px;height:2px;background:#1c1917;border-radius:2px;transition:all .3s}

@media(min-width:769px){
  .header__cta{display:inline-flex}
}
@media(max-width:768px){
  .header__nav{display:none}
  .header__cta{display:none}
  .header__hamburger{display:flex}
}

/* ── Bottom Sheet (Mobile Nav) ────────────────────────────── */
.bsheet-overlay{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:2000;opacity:0;visibility:hidden;transition:all .3s}
.bsheet-overlay--open{opacity:1;visibility:visible}
.bsheet{position:fixed;bottom:0;left:0;right:0;background:#fff;border-radius:16px 16px 0 0;z-index:2001;transform:translateY(100%);transition:transform .35s cubic-bezier(.32,.72,0,1);max-height:85vh;overflow-y:auto;padding-bottom:env(safe-area-inset-bottom)}
.bsheet--open{transform:translateY(0)}
.bsheet__handle{width:36px;height:4px;background:#d6d3d1;border-radius:4px;margin:10px auto 8px}
.bsheet__nav{padding:8px 20px 20px}
.bsheet__link{display:flex;align-items:center;gap:10px;padding:14px 0;font-size:1rem;font-weight:500;color:#1c1917;border-bottom:1px solid #f5f5f4}
.bsheet__link:last-child{border-bottom:none}
.bsheet__link svg{width:20px;height:20px;color:#78716c}
.bsheet__ctas{display:flex;gap:10px;padding:12px 20px 20px;border-top:1px solid #e7e5e4}
.bsheet__ctas .btn{flex:1;text-align:center;justify-content:center}

/* ── Welcome ──────────────────────────────────────────────── */
.welcome{padding:72px 0 56px;background:#0f172a;color:#fff;text-align:center}
.welcome__label{display:inline-block;padding:5px 16px;border-radius:50px;background:rgba(14,165,233,.15);color:#38bdf8;font-size:.8rem;font-weight:600;margin-bottom:20px;letter-spacing:.3px}
.welcome__title{font-size:2.2rem;font-weight:800;line-height:1.25;margin-bottom:16px;max-width:600px;margin-left:auto;margin-right:auto}
.welcome__desc{font-size:1rem;color:#94a3b8;margin-bottom:28px;max-width:520px;margin-left:auto;margin-right:auto;line-height:1.7}
.welcome__btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
@media(max-width:600px){
  .welcome{padding:48px 0 40px}
  .welcome__title{font-size:1.6rem}
}

/* ── Section ──────────────────────────────────────────────── */
.section{padding:60px 0}
.section--alt{background:#fff}
.section__heading{font-size:1.4rem;font-weight:800;text-align:center;margin-bottom:32px}
.section__more{text-align:center;margin-top:32px}

/* ── Category Grid ───────────────────────────────────────── */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;max-width:720px;margin:0 auto}
.cat-card{display:flex;flex-direction:column;align-items:center;gap:6px;padding:20px 12px;border-radius:12px;background:#fff;border:1px solid #e7e5e4;transition:all .25s;text-align:center}
.cat-card:hover{border-color:#0ea5e9;box-shadow:0 4px 16px rgba(14,165,233,.1);transform:translateY(-2px)}
.cat-card__icon{font-size:1.6rem}
.cat-card__name{font-size:.9rem;font-weight:700;color:#1c1917}
.cat-card__count{font-size:.75rem;color:#a8a29e}
@media(max-width:600px){.cat-grid{grid-template-columns:repeat(2,1fr)}}

/* ── Featured Card ───────────────────────────────────────── */
.feat-card{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:28px 32px;border-radius:14px;background:#fff;border:1px solid #e7e5e4;border-left:4px solid #0ea5e9;transition:all .25s}
.feat-card:hover{border-color:#0ea5e9;box-shadow:0 6px 20px rgba(14,165,233,.08)}
.feat-card__body{flex:1}
.feat-card__tag{display:inline-block;padding:3px 10px;border-radius:50px;background:rgba(14,165,233,.1);color:#0ea5e9;font-size:.72rem;font-weight:700;margin-bottom:10px}
.feat-card__title{font-size:1.2rem;font-weight:700;margin-bottom:6px;line-height:1.4}
.feat-card__desc{font-size:.88rem;color:#78716c;line-height:1.6}
.feat-card__arrow{font-size:1.4rem;color:#a8a29e;flex-shrink:0;transition:color .2s}
.feat-card:hover .feat-card__arrow{color:#0ea5e9}
@media(max-width:600px){.feat-card{padding:20px;flex-direction:column;align-items:flex-start}.feat-card__arrow{display:none}}

/* ── Numbered List ───────────────────────────────────────── */
.num-list{display:flex;flex-direction:column}
.num-list__row{display:flex;align-items:center;gap:16px;padding:14px 0;border-bottom:1px solid #f5f5f4;transition:color .2s}
.num-list__row:first-child{border-top:1px solid #f5f5f4}
.num-list__row:hover{color:#0ea5e9}
.num-list__rank{width:28px;height:28px;border-radius:6px;background:#f5f5f4;display:flex;align-items:center;justify-content:center;font-size:.78rem;font-weight:700;color:#78716c;flex-shrink:0}
.num-list__row:hover .num-list__rank{background:rgba(14,165,233,.1);color:#0ea5e9}
.num-list__title{flex:1;font-size:.95rem;font-weight:500}
.num-list__tag{padding:3px 10px;border-radius:50px;background:rgba(14,165,233,.06);color:#0ea5e9;font-size:.72rem;font-weight:600;flex-shrink:0}
@media(max-width:600px){.num-list__tag{display:none}}

/* ── Step Cards ──────────────────────────────────────────── */
.step-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;max-width:900px;margin:0 auto}
.step-card{background:#fff;border:1px solid #e7e5e4;border-radius:14px;padding:28px 24px;transition:all .25s}
.step-card:hover{border-color:#0ea5e9;box-shadow:0 4px 16px rgba(14,165,233,.08)}
.step-card__num{display:block;font-size:2rem;font-weight:800;background:linear-gradient(135deg,#0ea5e9,#ec4899);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:12px}
.step-card__title{font-weight:700;font-size:1rem;margin-bottom:8px}
.step-card__desc{font-size:.85rem;color:#78716c;line-height:1.6;margin-bottom:12px}
@media(max-width:768px){.step-cards{grid-template-columns:1fr;max-width:400px}}

/* ── Masonry Grid ─────────────────────────────────────────── */
.masonry{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.masonry__item{background:#fff;border-radius:12px;border:1px solid #e7e5e4;padding:24px;transition:all .25s;display:flex;flex-direction:column}
.masonry__item:hover{border-color:#0ea5e9;box-shadow:0 6px 20px rgba(14,165,233,.08);transform:translateY(-2px)}
.masonry__tag{display:inline-block;padding:3px 10px;border-radius:50px;font-size:.72rem;font-weight:700;margin-bottom:10px;width:fit-content}
.masonry__tag--1{background:rgba(14,165,233,.1);color:#0ea5e9}
.masonry__tag--2{background:rgba(236,72,153,.1);color:#ec4899}
.masonry__tag--3{background:rgba(168,85,247,.1);color:#a855f7}
.masonry__tag--4{background:rgba(245,158,11,.1);color:#f59e0b}
.masonry__tag--5{background:rgba(16,185,129,.1);color:#10b981}
.masonry__tag--6{background:rgba(239,68,68,.1);color:#ef4444}
.masonry__tag--7{background:rgba(99,102,241,.1);color:#6366f1}
.masonry__tag--8{background:rgba(20,184,166,.1);color:#14b8a6}
.masonry__title{font-size:1rem;font-weight:600;margin-bottom:8px;line-height:1.4}
.masonry__desc{font-size:.85rem;color:#78716c;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.masonry__date{font-size:.78rem;color:#a8a29e;margin-top:auto}
@media(max-width:1024px){.masonry{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.masonry{grid-template-columns:1fr}}

/* (steps moved to step-cards above) */

/* ── App Download Section ─────────────────────────────────── */
.app-dl{border-radius:20px;background:linear-gradient(135deg,#0ea5e9,#a855f7,#ec4899);padding:48px;display:flex;align-items:center;gap:40px;color:#fff;overflow:hidden;position:relative}
.app-dl__text{flex:1;position:relative;z-index:2}
.app-dl__title{font-size:1.6rem;font-weight:800;margin-bottom:12px}
.app-dl__desc{font-size:.95rem;opacity:.9;margin-bottom:24px;max-width:400px}
.app-dl__btns{display:flex;gap:12px;flex-wrap:wrap}
.app-dl__mockup{position:relative;z-index:2;flex-shrink:0}
.app-dl__phone{width:160px;height:280px;border-radius:24px;background:rgba(255,255,255,.15);backdrop-filter:blur(8px);border:2px solid rgba(255,255,255,.3);display:flex;align-items:center;justify-content:center;position:relative}
.app-dl__phone::before{content:'';position:absolute;top:8px;left:50%;transform:translateX(-50%);width:50px;height:4px;border-radius:4px;background:rgba(255,255,255,.4)}
.app-dl__screen{font-weight:800;font-size:1.2rem;letter-spacing:1px}
@media(max-width:768px){
  .app-dl{flex-direction:column;text-align:center;padding:36px 24px}
  .app-dl__desc{margin-left:auto;margin-right:auto}
  .app-dl__btns{justify-content:center}
  .app-dl__phone{width:120px;height:210px}
}

/* ── FAQ ──────────────────────────────────────────────────── */
.faq{max-width:720px;margin:0 auto}
.faq__item{border:1px solid #e7e5e4;border-radius:12px;margin-bottom:10px;overflow:hidden;background:#fff;transition:border-color .2s}
.faq__item--open{border-color:#0ea5e9}
.faq__question{display:flex;align-items:center;justify-content:space-between;width:100%;padding:18px 20px;font-size:.95rem;font-weight:600;text-align:left}
.faq__chevron{transition:transform .25s;flex-shrink:0;color:#a8a29e}
.faq__item--open .faq__chevron{transform:rotate(180deg);color:#0ea5e9}
.faq__answer{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq__item--open .faq__answer{max-height:300px}
.faq__answer p{padding:0 20px 18px;color:#78716c;font-size:.9rem;line-height:1.7}

/* ── Bottom CTA ───────────────────────────────────────────── */
.bottom-cta{border-radius:20px;background:linear-gradient(135deg,#0ea5e9,#ec4899);padding:48px;text-align:center;color:#fff}
.bottom-cta__title{font-size:1.6rem;font-weight:800;margin-bottom:10px}
.bottom-cta__desc{font-size:.95rem;opacity:.9;margin-bottom:24px;max-width:500px;margin-left:auto;margin-right:auto}
.bottom-cta__btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ── Footer ───────────────────────────────────────────────── */
.footer{background:#1c1917;color:#d6d3d1;padding:48px 0 0}
.footer__main{text-align:center;max-width:600px;margin:0 auto;padding-bottom:32px}
.footer__brand{display:flex;align-items:center;justify-content:center;gap:10px;margin-bottom:16px}
.footer__logo{width:32px;height:32px;border-radius:6px;background:linear-gradient(135deg,#0ea5e9,#ec4899);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:.7rem;letter-spacing:1px}
.footer__brand-name{font-weight:700;font-size:1rem;color:#fff}
.footer__desc{font-size:.85rem;color:#a8a29e;margin-bottom:20px;line-height:1.6}
.footer__links{display:flex;justify-content:center;gap:20px;flex-wrap:wrap;margin-bottom:24px}
.footer__link{font-size:.85rem;color:#a8a29e;transition:color .2s}
.footer__link:hover{color:#0ea5e9}
.footer__risk{border-top:1px solid #292524;padding:20px 0;text-align:center}
.footer__risk-title{font-size:.8rem;font-weight:700;color:#a8a29e;margin-bottom:6px}
.footer__risk-text{font-size:.78rem;color:#78716c;max-width:700px;margin:0 auto;line-height:1.6}
.footer__bottom{border-top:1px solid #292524;padding:16px 0;display:flex;align-items:center;justify-content:space-between}
.footer__copy{font-size:.78rem;color:#78716c}
.footer__langs{display:flex;gap:4px}
.footer__lang{padding:4px 10px;border-radius:4px;font-size:.75rem;font-weight:600;color:#78716c;transition:all .2s}
.footer__lang:hover{color:#0ea5e9}
.footer__lang--active{color:#0ea5e9;background:rgba(14,165,233,.1)}

/* ── Posts List Page ───────────────────────────────────────── */
.page-wrapper{padding:40px 0 60px}
.page-header{margin-bottom:32px}
.page-header__title{font-size:1.8rem;font-weight:800;margin-bottom:8px}
.page-header__desc{color:#78716c;font-size:.95rem}

/* ── Article List ─────────────────────────────────────────── */
.article-list{display:flex;flex-direction:column;gap:2px}
.article-list__item{display:flex;align-items:center;justify-content:space-between;padding:16px 0;border-bottom:1px solid #f5f5f4;transition:all .2s;gap:16px}
.article-list__item:hover{color:#0ea5e9}
.article-list__title{font-weight:500;font-size:.95rem;flex:1}
.article-list__meta{display:flex;align-items:center;gap:10px;flex-shrink:0}
.article-list__tag{padding:3px 10px;border-radius:50px;background:rgba(14,165,233,.08);color:#0ea5e9;font-size:.72rem;font-weight:600}
.article-list__date{font-size:.8rem;color:#a8a29e}
@media(max-width:600px){
  .article-list__item{flex-direction:column;align-items:flex-start;gap:6px}
  .article-list__meta{gap:8px}
}

/* ── Tags Grid ────────────────────────────────────────────── */
.tags-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px}
.tags-card{background:#fff;border:1px solid #e7e5e4;border-radius:12px;padding:20px;text-align:center;transition:all .25s}
.tags-card:hover{border-color:#0ea5e9;box-shadow:0 4px 14px rgba(14,165,233,.08);transform:translateY(-2px)}
.tags-card__name{display:block;font-weight:700;font-size:1rem;margin-bottom:4px}
.tags-card__count{font-size:.82rem;color:#a8a29e}

/* ── Tag Page Header ──────────────────────────────────────── */
.tag-page-header{padding:40px 0 20px}
.tag-page-header h1{font-size:1.6rem;font-weight:800;margin-bottom:4px}
.tag-page-header p{color:#78716c;font-size:.9rem}

/* ── Breadcrumb ───────────────────────────────────────────── */
.breadcrumb{display:flex;align-items:center;gap:6px;font-size:.82rem;color:#a8a29e;margin-bottom:20px;flex-wrap:wrap}
.breadcrumb a{color:#78716c;transition:color .2s}
.breadcrumb a:hover{color:#0ea5e9}
.breadcrumb__sep{color:#d6d3d1}

/* ── Post Page ────────────────────────────────────────────── */
.post-page{padding:40px 0 60px}
.post-page__inner{max-width:780px;margin:0 auto}

/* ── Post Header ──────────────────────────────────────────── */
.post-header{margin-bottom:32px}
.post-header__tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.post-header__title{font-size:1.8rem;font-weight:800;margin-bottom:12px;line-height:1.35}
.post-header__meta{display:flex;align-items:center;gap:8px;font-size:.85rem;color:#a8a29e;flex-wrap:wrap}
.post-header__meta .meta-sep{color:#d6d3d1}

/* ── Tag Chip ─────────────────────────────────────────────── */
.tag-chip{display:inline-block;padding:4px 12px;border-radius:50px;background:rgba(14,165,233,.08);color:#0ea5e9;font-size:.78rem;font-weight:600;transition:all .2s}
.tag-chip:hover{background:rgba(14,165,233,.15)}
.tag-chip--sm{padding:2px 8px;font-size:.72rem}

.post-body{font-size:1rem;line-height:1.8}
.post-body h2{font-size:1.4rem;margin:36px 0 14px;padding-top:20px;border-top:1px solid #f5f5f4}
.post-body h2:first-child{border-top:none;margin-top:0;padding-top:0}
.post-body h3{font-size:1.15rem;margin:24px 0 10px}
.post-body p{margin-bottom:16px;color:#44403c}
.post-body ul,.post-body ol{margin-bottom:16px;padding-left:24px}
.post-body ul{list-style:disc}
.post-body ol{list-style:decimal}
.post-body li{margin-bottom:6px;color:#44403c}
.post-body a{color:#0ea5e9;text-decoration:underline;text-underline-offset:2px}
.post-body a:hover{color:#0284c7}
.post-body strong{font-weight:700;color:#1c1917}
.post-body blockquote{border-left:3px solid #0ea5e9;padding:12px 20px;margin:20px 0;background:#f0f9ff;border-radius:0 8px 8px 0;color:#44403c}
.post-body code{background:#f5f5f4;padding:2px 6px;border-radius:4px;font-size:.88rem;font-family:'Fira Code',monospace}
.post-body pre{background:#1c1917;color:#e7e5e4;padding:20px;border-radius:10px;overflow-x:auto;margin:20px 0}
.post-body pre code{background:none;padding:0;color:inherit}
.post-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:.9rem}
.post-body th,.post-body td{padding:10px 14px;border:1px solid #e7e5e4;text-align:left}
.post-body th{background:#f5f5f4;font-weight:600}
.post-body .heading-anchor{color:#d6d3d1;text-decoration:none;margin-left:6px;font-weight:400}
.post-body .heading-anchor:hover{color:#0ea5e9}

/* ── CTA Cards (inline) ───────────────────────────────────── */
.cta-card{border-radius:14px;background:linear-gradient(135deg,#f0f9ff,#fdf2f8);border:1px solid #e0f2fe;padding:24px;margin:28px 0;text-align:center}
.cta-card__title{font-size:1.1rem;font-weight:700;margin-bottom:6px}
.cta-card__desc{font-size:.88rem;color:#78716c;margin-bottom:14px}
.cta-card__btns{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}

.download-cta{border-radius:14px;background:#fff;border:1px solid #e7e5e4;padding:24px;margin:28px 0;text-align:center}
.download-cta__title{font-size:1.1rem;font-weight:700;margin-bottom:6px}
.download-cta__desc{font-size:.88rem;color:#78716c;margin-bottom:14px}
.download-cta__btns{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}

/* ── Floating Action Menu ─────────────────────────────────── */
.fab{position:fixed;bottom:24px;right:24px;z-index:900;display:flex;flex-direction:column;gap:10px}
.fab__btn{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#fff;border:1px solid #e7e5e4;box-shadow:0 2px 10px rgba(0,0,0,.08);transition:all .25s;color:#78716c}
.fab__btn:hover{color:#0ea5e9;border-color:#0ea5e9;box-shadow:0 4px 16px rgba(14,165,233,.15)}
.fab__btn svg{width:20px;height:20px}

/* ── Mini TOC Popup ───────────────────────────────────────── */
.mini-toc{position:fixed;bottom:80px;right:24px;width:280px;max-height:400px;overflow-y:auto;background:#fff;border:1px solid #e7e5e4;border-radius:14px;box-shadow:0 8px 32px rgba(0,0,0,.12);padding:16px;z-index:901;opacity:0;visibility:hidden;transform:translateY(10px);transition:all .25s}
.mini-toc--open{opacity:1;visibility:visible;transform:translateY(0)}
.mini-toc__title{font-size:.85rem;font-weight:700;color:#a8a29e;margin-bottom:10px;text-transform:uppercase;letter-spacing:.5px}
.mini-toc__list{list-style:none}
.mini-toc__item{margin-bottom:2px}
.mini-toc__item a{display:block;padding:6px 10px;border-radius:6px;font-size:.85rem;color:#44403c;transition:all .15s}
.mini-toc__item a:hover{background:#f0f9ff;color:#0ea5e9}
.mini-toc__item--active a{color:#0ea5e9;font-weight:600;background:rgba(14,165,233,.05)}
.mini-toc__item--sub{padding-left:12px}
.mini-toc__item--sub a{font-size:.8rem;color:#78716c}

/* ── Share Popup ──────────────────────────────────────────── */
.share-popup{position:fixed;bottom:80px;right:24px;background:#fff;border:1px solid #e7e5e4;border-radius:14px;box-shadow:0 8px 32px rgba(0,0,0,.12);padding:12px;z-index:901;opacity:0;visibility:hidden;transform:translateY(10px);transition:all .25s}
.share-popup--open{opacity:1;visibility:visible;transform:translateY(0)}
.share-popup__btn{display:flex;align-items:center;gap:8px;padding:10px 16px;border-radius:8px;font-size:.85rem;font-weight:500;width:100%;transition:all .15s;color:#44403c}
.share-popup__btn:hover{background:#f5f5f4;color:#0ea5e9}
.share-popup__btn svg{width:18px;height:18px;flex-shrink:0}

/* ── Related Posts ─────────────────────────────────────────── */
.related-section{padding:40px 0 60px}
.related-section__title{font-size:1.2rem;font-weight:700;margin-bottom:20px}
.related-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.related-card{background:#fff;border:1px solid #e7e5e4;border-radius:12px;padding:20px;transition:all .25s}
.related-card:hover{border-color:#0ea5e9;box-shadow:0 4px 14px rgba(14,165,233,.08)}
.related-card__title{font-weight:600;font-size:.92rem;margin-bottom:6px}
.related-card__date{font-size:.78rem;color:#a8a29e}
@media(max-width:600px){.related-grid{grid-template-columns:1fr}}

/* ── Page Content ─────────────────────────────────────────── */
.page-content{padding:40px 0 60px}
.page-content h1{font-size:1.8rem;font-weight:800;margin-bottom:20px}
.page-content h2{font-size:1.3rem;font-weight:700;margin:28px 0 12px}
.page-content p{margin-bottom:14px;color:#44403c;line-height:1.7}
.page-content ol{list-style:decimal;padding-left:24px;margin-bottom:16px}
.page-content ul{list-style:disc;padding-left:24px;margin-bottom:16px}
.page-content li{margin-bottom:6px;color:#44403c}
.page-content a{color:#0ea5e9}
.page-content a:hover{text-decoration:underline}
.page-content strong{font-weight:700;color:#1c1917}

/* ── Download Page ───────────────────────────────────────── */
.dl-hero{background:#0f172a;color:#fff;padding:56px 0 48px;text-align:center}
.dl-hero__icon{font-size:3rem;margin-bottom:16px}
.dl-hero__title{font-size:2rem;font-weight:800;margin-bottom:10px}
.dl-hero__desc{color:#94a3b8;font-size:.95rem;max-width:480px;margin:0 auto}
.dl-platforms{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:40px 0}
.dl-platform{background:#fff;border:1px solid #e7e5e4;border-radius:16px;padding:32px 28px;position:relative;overflow:hidden}
.dl-platform::before{content:'';position:absolute;top:0;left:0;right:0;height:4px}
.dl-platform--android::before{background:linear-gradient(90deg,#34d399,#10b981)}
.dl-platform--ios::before{background:linear-gradient(90deg,#60a5fa,#3b82f6)}
.dl-platform__badge{display:inline-block;padding:4px 14px;border-radius:50px;font-size:.75rem;font-weight:700;letter-spacing:.5px;margin-bottom:16px}
.dl-platform--android .dl-platform__badge{background:rgba(16,185,129,.1);color:#10b981}
.dl-platform--ios .dl-platform__badge{background:rgba(59,130,246,.1);color:#3b82f6}
.dl-platform__title{font-size:1.2rem;font-weight:700;margin-bottom:10px}
.dl-platform__desc{font-size:.9rem;color:#78716c;margin-bottom:16px;line-height:1.6}
.dl-platform__steps{list-style:none;counter-reset:step;margin-bottom:20px}
.dl-platform__steps li{counter-increment:step;position:relative;padding-left:32px;margin-bottom:10px;font-size:.9rem;color:#44403c;line-height:1.5}
.dl-platform__steps li::before{content:counter(step);position:absolute;left:0;top:1px;width:22px;height:22px;border-radius:50%;background:#f5f5f4;font-size:.75rem;font-weight:700;display:flex;align-items:center;justify-content:center;color:#78716c}
.dl-issues{margin:40px 0}
.dl-issues__title{font-size:1.3rem;font-weight:700;text-align:center;margin-bottom:24px}
.dl-issues__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.dl-issue{background:#fff;border:1px solid #e7e5e4;border-radius:12px;padding:20px}
.dl-issue__title{font-size:.95rem;font-weight:700;margin-bottom:6px;color:#1c1917}
.dl-issue__desc{font-size:.85rem;color:#78716c;line-height:1.6}
.dl-final{border-radius:16px;background:linear-gradient(135deg,#0ea5e9,#ec4899);padding:40px;text-align:center;color:#fff;margin:40px 0 60px}
.dl-final__title{font-size:1.4rem;font-weight:800;margin-bottom:8px}
.dl-final__desc{font-size:.9rem;opacity:.9;margin-bottom:20px;max-width:400px;margin-left:auto;margin-right:auto}
@media(max-width:768px){
  .dl-platforms{grid-template-columns:1fr}
  .dl-issues__grid{grid-template-columns:1fr}
  .dl-hero__title{font-size:1.5rem}
  .dl-final{padding:28px 20px;border-radius:12px}
}

/* ── About Page ──────────────────────────────────────────── */
.about-hero{background:#0f172a;color:#fff;padding:56px 0 48px;text-align:center}
.about-hero__title{font-size:2rem;font-weight:800;margin-bottom:12px}
.about-hero__desc{color:#94a3b8;font-size:.95rem;max-width:560px;margin:0 auto;line-height:1.7}
.about-section{padding:48px 0}
.about-section--alt{background:#fff}
.about-section__title{font-size:1.3rem;font-weight:700;text-align:center;margin-bottom:24px}
.about-mission{max-width:700px;margin:0 auto;text-align:center}
.about-mission__text{font-size:.95rem;color:#44403c;line-height:1.8}
.about-topics__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;max-width:900px;margin:0 auto}
.about-topic{background:#fafaf9;border:1px solid #e7e5e4;border-radius:12px;padding:20px 16px;text-align:center;transition:all .25s}
.about-topic:hover{border-color:#0ea5e9;box-shadow:0 4px 14px rgba(14,165,233,.08);transform:translateY(-2px)}
.about-topic__icon{font-size:1.5rem;display:block;margin-bottom:8px}
.about-topic__name{font-size:.9rem;font-weight:700;margin-bottom:4px;color:#1c1917}
.about-topic__desc{font-size:.78rem;color:#78716c;line-height:1.5}
.about-qa{max-width:700px;margin:0 auto}
.about-qa__item{background:#fff;border:1px solid #e7e5e4;border-radius:14px;padding:24px 28px;margin-bottom:16px}
.about-qa__question{font-size:1.05rem;font-weight:700;margin-bottom:8px;color:#1c1917}
.about-qa__answer{font-size:.9rem;color:#44403c;line-height:1.7}
.about-qa__answer a{color:#0ea5e9}
.about-qa__answer a:hover{text-decoration:underline}
.about-cta{border-radius:16px;background:linear-gradient(135deg,#0ea5e9,#ec4899);padding:40px;text-align:center;color:#fff;max-width:700px;margin:0 auto}
.about-cta__title{font-size:1.4rem;font-weight:800;margin-bottom:8px}
.about-cta__desc{font-size:.9rem;opacity:.9;margin-bottom:20px;max-width:400px;margin-left:auto;margin-right:auto}
.about-cta__btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
@media(max-width:768px){
  .about-topics__grid{grid-template-columns:repeat(2,1fr)}
  .about-hero__title{font-size:1.5rem}
  .about-cta{padding:28px 20px;border-radius:12px}
  .about-qa__item{padding:20px}
}
@media(max-width:480px){
  .about-topics__grid{grid-template-columns:1fr 1fr}
}

/* ── 404 Page ─────────────────────────────────────────────── */
.error-page{text-align:center;padding:80px 0}
.error-page__code{font-size:6rem;font-weight:800;background:linear-gradient(135deg,#0ea5e9,#ec4899);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1}
.error-page__title{font-size:1.4rem;margin:12px 0 8px}
.error-page__desc{color:#78716c;margin-bottom:28px}
.error-page__btns{display:flex;gap:12px;justify-content:center}

/* ── Empty State ──────────────────────────────────────────── */
.empty-state{text-align:center;color:#a8a29e;padding:60px 0;font-size:.95rem}

/* ── Utility ──────────────────────────────────────────────── */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}

/* ── Global Responsive ───────────────────────────────────── */
@media(max-width:768px){
  .post-header__title{font-size:1.35rem}
  .post-body h2{font-size:1.2rem}
  .post-body h3{font-size:1.05rem}
  .section__heading{font-size:1.2rem}
  .footer__bottom{flex-direction:column;gap:10px;text-align:center}
  .page-header__title{font-size:1.4rem}
  .error-page__code{font-size:4rem}
  .bottom-cta{padding:32px 20px;border-radius:14px}
  .bottom-cta__title{font-size:1.3rem}
  .cta-card{padding:20px}
  .download-cta{padding:20px}
  .fab{bottom:16px;right:16px}
  .mini-toc{right:16px;bottom:70px;width:260px}
  .share-popup{right:16px;bottom:70px}
}
@media(max-width:480px){
  .container{padding:0 16px}
  .welcome__title{font-size:1.4rem}
  .post-header__title{font-size:1.2rem}
  .post-body{font-size:.95rem}
  .btn{padding:10px 22px;font-size:.88rem}
}

/* ── Post body table scroll ──────────────────────────────── */
.post-body table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}