:root{
  --brand:#0E6E64;--brand-dk:#0A5750;--brand-soft:#E3F1EF;--signal:#C77A16;--signal-soft:#F7EEDD;
  --surface:#F4F6F8;--raised:#fff;--dark:#16202B;--ink:#1B2836;--muted:#5A6B7B;--line:#D9E0E6;--inv:#F4F6F8;
  --r-card:8px;--r-ctl:6px;--r-chip:4px;--max:1180px;
  --sans:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono",SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);font-size:16px;line-height:1.7;color:var(--ink);background:var(--surface);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
[hidden]{display:none!important}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.app{min-height:100vh;display:flex;flex-direction:column}
main{flex:1}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 20px}
.narrow{max-width:760px}
@media(min-width:768px){.container{padding:0 24px}}
.h-4{width:16px;height:16px}.w-4{}.h-3{width:12px;height:12px}.h-3\.5{width:14px;height:14px}.h-5{width:20px;height:20px}
svg{flex-shrink:0}.text-brand{color:var(--brand)}
.mt-4{margin-top:16px}.mt-6{margin-top:24px}.mt-8{margin-top:32px}.mt-12{margin-top:48px}
.muted{color:var(--muted)}.tiny{font-size:12px;color:var(--muted);margin-top:12px;text-align:center}
.bg-white{background:var(--raised)}.bg-dark{background:var(--dark);color:var(--inv)}

/* header */
.site-header{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.95);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-row{height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:12px}
.brand-text{display:flex;flex-direction:column;line-height:1}
.brand-name{font-size:18px;font-weight:600;letter-spacing:.05em}
.brand-en{margin-top:4px;font:10px var(--mono);letter-spacing:.16em;color:var(--muted)}
.nav-desktop{display:none;gap:4px}
.nav-link{position:relative;padding:8px 12px;border-radius:var(--r-ctl);font-size:15px;font-weight:500;color:var(--muted);transition:color .2s}
.nav-link:hover{color:var(--ink)}
.nav-link span{position:relative}
.nav-link.is-active{color:var(--brand)}
.nav-link.is-active span::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;border-radius:2px;background:var(--brand)}
.header-actions{display:flex;align-items:center;gap:8px}
.icon-btn{width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;border:0;background:none;border-radius:var(--r-ctl);cursor:pointer;color:var(--ink)}
.icon-btn:hover{background:var(--surface)}
.nav-mobile{border-top:1px solid var(--line);background:#fff;padding:12px 0 20px}
.nav-mobile .container{display:flex;flex-direction:column;gap:2px}
.nav-mobile a:not(.btn){padding:12px 4px;border-bottom:1px solid var(--line);font-weight:500}
.nav-mobile .btn{margin-top:14px}
@media(min-width:1024px){.nav-desktop{display:flex}.menu-btn{display:none}}
@media(max-width:1023px){.hide-mobile{display:none!important}}
@media(max-width:639px){.hide-xs{display:none}}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border-radius:var(--r-ctl);border:1px solid transparent;font-size:15px;font-weight:500;cursor:pointer;transition:background .2s,border-color .2s,color .2s;line-height:1.4}
.btn-sm{padding:8px 16px;font-size:14px}
.btn-primary{background:var(--brand);color:#fff}.btn-primary:hover{background:var(--brand-dk)}
.btn-outline{border-color:var(--line);background:#fff;color:var(--ink)}.btn-outline:hover{border-color:var(--brand);color:var(--brand)}
.btn-light{background:var(--inv);color:var(--dark)}.btn-light:hover{background:#fff}
.btn-block{width:100%}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.btn[disabled]{opacity:.6;cursor:not-allowed}
.text-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:500;color:var(--brand)}
.text-link:hover{text-decoration:underline}

/* type */
.eyebrow{margin-bottom:12px;font:500 12px var(--mono);letter-spacing:.18em;text-transform:uppercase;color:var(--brand)}
.eyebrow-inv{color:rgba(244,246,248,.55)}
.h1{font-size:34px;font-weight:600;line-height:1.2;letter-spacing:-.01em}
.h1-page{font-size:32px;max-width:860px}
.h1-article{font-size:30px;margin-top:8px}
.h2{font-size:28px;font-weight:600;line-height:1.3}.h2-sm{font-size:26px}
.h3{font-size:22px;font-weight:600;line-height:1.35}.h3-sm{font-size:18px}
@media(min-width:768px){.h1{font-size:44px}.h1-page{font-size:38px}.h2{font-size:32px}.h1-article{font-size:36px}}
.lead{margin-top:16px;color:var(--muted);max-width:720px}.lead-lg{margin-top:20px;max-width:620px}
.lead-inv{color:rgba(244,246,248,.7)}
.section{padding:56px 0}
@media(min-width:768px){.section{padding:80px 0}}
.section-head{max-width:760px}
.section-head-row{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px 40px}
.head-tools{display:flex;flex-wrap:wrap;align-items:center;gap:12px 24px}

/* hero */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);background:var(--surface)}
.hero-grid-bg{position:absolute;inset:0;pointer-events:none;opacity:.5;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:44px 44px;-webkit-mask-image:linear-gradient(180deg,#000,transparent 85%);mask-image:linear-gradient(180deg,#000,transparent 85%)}
.hero-grid{position:relative;display:grid;gap:40px;align-items:center;padding-top:48px;padding-bottom:56px}
@media(min-width:1024px){.hero-grid{grid-template-columns:1.05fr 1fr;padding-top:80px;padding-bottom:88px;gap:56px}}
.chip{display:inline-flex;align-items:center;gap:8px;margin-bottom:16px;padding:4px 12px;border:1px solid var(--line);border-radius:var(--r-chip);background:#fff;font:12px var(--mono);color:var(--muted)}
.chip .dot{width:6px;height:6px;border-radius:50%;background:var(--signal)}
.chip-signal{background:var(--signal-soft);border-color:#E8D3A8;color:#8A5410}
.chip-sep{margin-left:8px;padding-left:8px;border-left:1px solid #E0C58E}
.points{display:flex;flex-wrap:wrap;gap:12px 24px;margin-top:36px;font-size:14px;color:var(--muted)}
.points li{display:flex;align-items:center;gap:8px}
.window{overflow:hidden;border:1px solid var(--line);border-radius:var(--r-card);background:#fff;box-shadow:0 18px 40px -22px rgba(22,32,43,.35)}
.window-bar{display:flex;align-items:center;gap:6px;padding:10px 14px;border-bottom:1px solid var(--line);background:var(--surface)}
.window-bar i{width:10px;height:10px;border-radius:50%;background:var(--line)}
.window-bar span{margin-left:12px;font:11px var(--mono);color:var(--muted)}
.window img{width:100%}

/* cards */
.grid{display:grid;gap:24px}
@media(min-width:640px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}}
.card{display:flex;flex-direction:column;padding:28px;border:1px solid var(--line);border-radius:var(--r-card);background:#fff}
.card-hover{transition:border-color .25s,box-shadow .25s,transform .25s}
.card-hover:hover{border-color:var(--brand);box-shadow:0 14px 28px -18px rgba(14,110,100,.45);transform:translateY(-2px)}
.card .h3{margin-top:20px}.card .h3-sm{margin-top:0}
.card-desc{margin-top:12px;flex:1;font-size:14px;line-height:1.7;color:var(--muted)}
.card-link{margin-top:20px;display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:500;color:var(--brand)}
.card-hover:hover .card-link svg{transform:translateX(4px)}.card-link svg{transition:transform .3s}
.icon-chip{display:inline-flex;width:44px;height:44px;align-items:center;justify-content:center;border-radius:var(--r-ctl);background:var(--brand-soft);color:var(--brand)}
.card-img{padding:0;overflow:hidden}.card-img img{width:100%;aspect-ratio:10/7;object-fit:cover}.card-body{padding:22px}
.step{position:relative}.step-no{font:600 13px var(--mono);color:var(--signal);letter-spacing:.1em}
.step .h3{margin-top:10px}
.ticks{margin-top:18px;display:grid;gap:10px;font-size:14px;color:var(--ink)}
.ticks li{display:flex;gap:10px;align-items:flex-start}.ticks svg{color:var(--brand);margin-top:5px}

/* screenshots */
.shot{overflow:hidden;border:1px solid rgba(244,246,248,.12);border-radius:var(--r-card);background:rgba(244,246,248,.04)}
.shot img{width:100%;transition:transform .5s}.shot:hover img{transform:scale(1.03)}
.shot{overflow:hidden}.shot figcaption{border-top:1px solid rgba(244,246,248,.1);padding:16px 20px;position:relative;background:var(--dark)}
.shot-title{font-size:14px;font-weight:500}.shot-desc{margin-top:6px;font-size:12px;color:rgba(244,246,248,.6)}
.screens{display:grid;gap:56px}
.screen-row{display:grid;gap:24px;align-items:center}
@media(min-width:900px){.screen-row{grid-template-columns:1fr 1.5fr;gap:48px}.screen-row.is-rev{grid-template-columns:1.5fr 1fr}.screen-row.is-rev .screen-text{order:2}}
.screen-no{font:12px var(--mono);letter-spacing:.18em;text-transform:uppercase;color:var(--signal)}
.screen-text .h3{margin-top:10px}.screen-text p{margin-top:12px;color:rgba(244,246,248,.7)}

/* news */
.news-list{border-top:1px solid var(--line)}
.news-row{display:grid;gap:6px;padding:20px 0;border-bottom:1px solid var(--line)}
@media(min-width:768px){.news-row{grid-template-columns:110px 1fr auto;gap:24px}}
.news-row time{font:12px/24px var(--mono);color:var(--muted)}
.news-row h3{font-size:16px;font-weight:500;line-height:1.5}
.news-row h3 a:hover{color:var(--brand)}
.news-row p{margin-top:6px;font-size:14px;color:var(--muted)}
.tag{display:inline-block;align-self:start;padding:2px 10px;border-radius:var(--r-chip);background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:500;line-height:22px}
.tag-fix{background:var(--surface);color:var(--muted);border:1px solid var(--line)}
.tag-major{background:var(--signal-soft);color:#8A5410}
.filters{display:flex;flex-wrap:wrap;gap:8px}
.filter{padding:5px 14px;border:1px solid var(--line);border-radius:999px;background:#fff;font-size:13px;cursor:pointer;color:var(--muted)}
.filter:hover{border-color:var(--brand);color:var(--brand)}
.filter.is-active{background:var(--brand);border-color:var(--brand);color:#fff}
.empty{padding:40px 0;text-align:center;color:var(--muted)}

/* cta */
.cta-dark{background:var(--dark);color:var(--inv);border-block:1px solid var(--line)}
.cta-grid{display:grid;gap:32px;align-items:center;padding-top:56px;padding-bottom:56px}
@media(min-width:768px){.cta-grid{grid-template-columns:1fr 360px;padding-top:72px;padding-bottom:72px;gap:64px}}
.h2-sm{font-size:26px}.cta-dark .h2{margin-top:12px}
.version-card{padding:28px;border:1px solid rgba(244,246,248,.12);border-radius:var(--r-card);background:rgba(244,246,248,.04)}
.version-no{font:600 28px var(--mono)}.version-no-dk{font-size:36px;margin-top:6px}
.version-meta{margin:8px 0 20px;font-size:14px;color:rgba(244,246,248,.65)}
.callout{display:flex;flex-direction:column;gap:28px;padding:32px;border:1px solid rgba(14,110,100,.3);border-radius:var(--r-card);background:var(--brand-soft)}
@media(min-width:768px){.callout{flex-direction:row;align-items:center;justify-content:space-between;padding:44px}.callout-sm{padding:28px}}
.callout .h3{margin-top:20px}.callout .lead{margin-top:12px;max-width:560px}.callout .btn-row{margin-top:0}
.callout-sm{padding:24px;gap:16px}.callout-sm .btn{align-self:flex-start;white-space:nowrap}

/* sub pages */
.page-hero{padding:56px 0 48px;border-bottom:1px solid var(--line);background:var(--surface)}
@media(min-width:768px){.page-hero{padding:80px 0 64px}}
.page-hero-sm{padding:40px 0 32px}
.meta{margin-top:20px;display:flex;align-items:center;gap:12px}.meta time{font:12px var(--mono);color:var(--muted)}
.prose{font-size:16px;line-height:1.9}.prose h2{font-size:24px;margin:40px 0 14px}.prose h3{font-size:19px;margin:28px 0 10px}
.prose p{margin:0 0 18px}.prose ul{margin:0 0 18px;padding-left:22px;list-style:disc}.prose li{margin:6px 0}.prose a{color:var(--brand);text-decoration:underline}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:56px;padding-top:24px;border-top:1px solid var(--line)}
.pager a{display:block;padding:14px 16px;border:1px solid var(--line);border-radius:var(--r-card);background:#fff;font-size:14px;font-weight:500}
.pager a:hover{border-color:var(--brand);color:var(--brand)}.pager small{display:block;font-size:12px;color:var(--muted);font-weight:400;margin-bottom:4px}.pager .r{text-align:right}
@media(max-width:600px){.pager{grid-template-columns:1fr}}

.faq-wrap{display:grid;gap:40px}
@media(min-width:900px){.faq-wrap{grid-template-columns:320px 1fr;gap:64px}}
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{display:flex;width:100%;align-items:center;justify-content:space-between;gap:16px;padding:20px 0;border:0;background:none;text-align:left;font-size:16px;font-weight:500;cursor:pointer}
.faq-q:hover{color:var(--brand)}.faq-ic{transition:transform .25s}.faq-q[aria-expanded=true] .faq-ic{transform:rotate(180deg)}
.faq-a{display:grid;grid-template-rows:0fr;visibility:hidden;transition:grid-template-rows .32s ease,visibility 0s .32s;font-size:15px;color:var(--muted)}
.faq-a-in{overflow:hidden;min-height:0}.faq-a-in p{padding:0 0 22px}
.faq-item.open .faq-a{grid-template-rows:1fr;visibility:visible;transition:grid-template-rows .32s ease,visibility 0s}

.dl-grid{display:grid;gap:40px}
@media(min-width:900px){.dl-grid{grid-template-columns:400px 1fr;gap:64px;align-items:start}}
.dl-card{padding:32px;border:1px solid var(--line);border-radius:var(--r-card);background:var(--surface)}
.dl-card .chip{margin-bottom:18px}.dl-card .btn{margin-top:22px}
.notice{margin-bottom:18px;padding:10px 14px;border-radius:var(--r-ctl);background:var(--signal-soft);color:#8A5410;font-size:13px}
.spec{width:100%;margin-top:20px;border-collapse:collapse;font-size:15px}
.spec th,.spec td{padding:14px 0;border-bottom:1px solid var(--line);text-align:left}
.spec th{width:130px;font-weight:500;color:var(--muted)}
.timeline{border-left:2px solid var(--line);margin-left:6px}
.timeline li{position:relative;padding:0 0 40px 28px}
.timeline li::before{content:"";position:absolute;left:-7px;top:8px;width:12px;height:12px;border-radius:50%;background:#fff;border:3px solid var(--brand)}
.timeline li:first-child::before{background:var(--brand)}
.tl-head{display:flex;flex-wrap:wrap;align-items:center;gap:12px}.tl-ver{font:600 20px var(--mono)}
.tl-head time{font:12px var(--mono);color:var(--muted)}.tl-dl{margin-left:auto}

.contact-grid{display:grid;gap:48px}
@media(min-width:960px){.contact-grid{grid-template-columns:1fr 1fr;gap:64px}}
.contact-list{margin-top:32px;border-top:1px solid var(--line)}
.contact-item{display:flex;align-items:center;gap:16px;padding:18px 0;border-bottom:1px solid var(--line)}
.ci-body{flex:1;min-width:0}.ci-label{font-size:13px;color:var(--muted)}.ci-val{font-size:17px;font-weight:500;word-break:break-all}.ci-note{font-size:13px;color:var(--muted)}
.card .ci-val{font-size:16px}
.copy-btn{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border:1px solid var(--line);border-radius:var(--r-ctl);background:#fff;font-size:13px;cursor:pointer;color:var(--muted)}
.copy-btn:hover{border-color:var(--brand);color:var(--brand)}
.map-card{position:relative;overflow:hidden;border:1px solid var(--line);border-radius:var(--r-card)}
.map-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.map-pin{position:absolute;left:50%;top:50%;transform:translate(-50%,-100%);display:flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;background:var(--brand);color:#fff;font-size:13px;font-weight:500;box-shadow:0 6px 16px rgba(0,0,0,.25)}

.fb-grid{display:grid;gap:32px;align-items:start}
@media(min-width:960px){.fb-grid{grid-template-columns:1.4fr 1fr;gap:40px}}
.form{gap:20px}.form .h3{margin:0}
.field{display:grid;gap:8px;font-size:14px;font-weight:500}.field b{color:#C0392B}
.field input,.field select,.field textarea{width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:var(--r-ctl);background:#fff;font-weight:400;font-size:15px}
.field textarea{resize:vertical;min-height:140px}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(14,110,100,.15)}
.field.err input,.field.err select,.field.err textarea{border-color:#C0392B}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.form-msg{min-height:22px;font-size:14px}.form-msg.ok{color:var(--brand)}.form-msg.bad{color:#C0392B}
.form .btn{align-self:flex-start;min-width:120px}
.side{display:grid;gap:20px}.side .card{padding:24px}.plain{margin-top:12px;display:grid;gap:8px;font-size:14px;color:var(--muted)}

/* footer */
.site-footer{background:var(--dark);color:var(--inv)}
.site-footer .container{padding-top:56px;padding-bottom:28px}
.footer-grid{display:grid;gap:40px}@media(min-width:768px){.footer-grid{grid-template-columns:1.2fr 1fr 1fr}}
.footer-brand{font-size:18px;font-weight:600;letter-spacing:.05em}
.footer-desc{margin-top:12px;max-width:380px;font-size:14px;color:rgba(244,246,248,.65)}
.footer-nav{margin-top:16px;display:grid;grid-template-columns:1fr 1fr;gap:10px;font-size:14px}
.footer-nav a{color:rgba(244,246,248,.75)}.footer-nav a:hover{color:#fff}
.footer-contact{margin-top:16px;display:grid;gap:10px;font-size:14px;color:rgba(244,246,248,.75)}
.footer-bottom{margin-top:48px;padding-top:24px;border-top:1px solid rgba(244,246,248,.1);display:flex;flex-direction:column;gap:6px;font-size:12px;color:rgba(244,246,248,.5)}
@media(min-width:768px){.footer-bottom{flex-direction:row;justify-content:space-between}}

/* search modal + toast */
.search-modal{position:fixed;inset:0;z-index:100;display:flex;justify-content:center;align-items:flex-start;padding:12vh 16px 0}
.search-overlay{position:absolute;inset:0;background:rgba(22,32,43,.55);backdrop-filter:blur(2px)}
.search-box{position:relative;width:100%;max-width:620px;border-radius:12px;background:#fff;box-shadow:0 24px 60px rgba(0,0,0,.3);overflow:hidden}
.search-head{display:flex;align-items:center;gap:12px;padding:14px 18px;border-bottom:1px solid var(--line);color:var(--muted)}
.search-head input{flex:1;border:0;outline:0;font-size:16px;background:none;color:var(--ink)}
.search-esc{border:1px solid var(--line);border-radius:4px;background:var(--surface);font:11px var(--mono);padding:2px 6px;color:var(--muted);cursor:pointer}
.search-results{max-height:50vh;overflow:auto;padding:8px}
.search-hint{padding:28px 12px;text-align:center;font-size:14px;color:var(--muted)}
.search-item{display:block;padding:10px 12px;border-radius:var(--r-ctl)}
.search-item:hover,.search-item.is-sel{background:var(--brand-soft)}
.search-item b{display:block;font-size:15px;font-weight:500}.search-item small{display:block;font-size:12px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.search-item em{font-style:normal;font-size:11px;margin-right:8px;padding:1px 6px;border-radius:3px;background:var(--surface);color:var(--muted)}
.toast{position:fixed;left:50%;bottom:32px;transform:translateX(-50%);z-index:120;padding:10px 20px;border-radius:var(--r-ctl);background:var(--dark);color:#fff;font-size:14px;box-shadow:0 10px 30px rgba(0,0,0,.3)}


/* ---------- 文章正文：富文本元素 ---------- */
.prose h2,.prose h3{line-height:1.4}
.prose strong{font-weight:600}
.prose u{text-underline-offset:3px}
.prose hr{border:0;border-top:1px solid var(--line);margin:36px 0}
.prose blockquote{margin:0 0 20px;padding:4px 0 4px 18px;border-left:3px solid var(--brand);color:var(--muted)}
.prose ol{margin:0 0 18px;padding-left:24px;list-style:decimal}
.prose code{padding:1px 6px;border-radius:4px;background:var(--surface);border:1px solid var(--line);font:.9em var(--mono)}
.prose pre{margin:0 0 20px;padding:14px 16px;overflow:auto;border-radius:var(--r-card);background:var(--dark);color:var(--inv);font:13px/1.7 var(--mono)}
.prose pre code{padding:0;border:0;background:none;color:inherit}
.prose img{margin:8px 0 22px;border-radius:var(--r-card);border:1px solid var(--line)}
.prose figure{margin:8px 0 26px}
.prose figure video{width:100%;border-radius:var(--r-card);background:#000;display:block}
.prose figure.media-embed{position:relative;aspect-ratio:16/9;border-radius:var(--r-card);overflow:hidden;background:#000}
.prose figure.media-embed iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.prose figcaption{margin-top:8px;font-size:13px;color:var(--muted);text-align:center}
.prose table{width:100%;margin:0 0 22px;border-collapse:collapse;font-size:15px;display:block;overflow-x:auto}
.prose th,.prose td{padding:10px 14px;border:1px solid var(--line);text-align:left}.prose th{background:var(--surface)}
.prose a.attachment{display:flex;align-items:center;gap:12px;margin:0 0 12px;padding:12px 16px;border:1px solid var(--line);border-radius:var(--r-card);background:#fff;text-decoration:none;color:var(--ink);font-size:15px;transition:border-color .2s,box-shadow .2s}
.prose a.attachment::before{content:"";flex:none;width:34px;height:34px;border-radius:var(--r-ctl);background:var(--brand-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230E6E64' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 3v12'/%3E%3Cpath d='m7 11 5 5 5-5'/%3E%3Cpath d='M4 20h16'/%3E%3C/svg%3E") center/18px no-repeat}
.prose a.attachment:hover{border-color:var(--brand);box-shadow:0 8px 20px -14px rgba(14,110,100,.6)}

/* ---------- 滚动动画 ---------- */
.scroll-progress{position:fixed;left:0;top:0;right:0;height:3px;z-index:70;background:var(--brand);transform:scaleX(0);transform-origin:0 50%;pointer-events:none}
.site-header{transition:box-shadow .25s ease,background-color .25s ease}
.site-header.is-stuck{box-shadow:0 8px 24px -16px rgba(22,32,43,.35)}

/* 首屏入场：一次性，按阅读顺序错峰 */
@keyframes rise{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
@keyframes shot-in{from{opacity:0;transform:translateY(24px) scale(.985)}to{opacity:1;transform:none}}
.hero .chip,.hero .h1,.hero .lead,.hero .btn-row,.hero .points{animation:rise .6s cubic-bezier(.2,.7,.2,1) both}
.hero .chip{animation-delay:.05s}.hero .h1{animation-delay:.12s}.hero .lead{animation-delay:.2s}.hero .btn-row{animation-delay:.28s}.hero .points{animation-delay:.36s}
.hero-shot{animation:shot-in .8s cubic-bezier(.2,.7,.2,1) .2s both}
.hero-grid-bg{animation:grid-fade 1.2s ease both}@keyframes grid-fade{from{opacity:0}to{opacity:.5}}

/* 滚动渐显：仅在 JS 就绪且用户未要求减少动效时启用，否则内容始终可见 */
.rv-on [data-rv]{opacity:0;transform:translateY(20px);transition:opacity .6s cubic-bezier(.2,.7,.2,1) var(--rv-d,0ms),transform .6s cubic-bezier(.2,.7,.2,1) var(--rv-d,0ms)}
.rv-on [data-rv="left"]{transform:translateX(-24px)}
.rv-on [data-rv="right"]{transform:translateX(24px)}
.rv-on [data-rv].in{opacity:1;transform:none}
/* 渐显结束后把 transition 还给悬停效果，避免卡片 hover 变慢 */
.rv-on .card-hover[data-rv].in{transition:opacity .6s ease var(--rv-d,0ms),transform .25s,border-color .25s,box-shadow .25s}
.timeline{position:relative}
.timeline li::before{transition:transform .4s cubic-bezier(.3,1.6,.5,1) calc(var(--rv-d,0ms) + .15s)}
.rv-on .timeline li[data-rv]::before{transform:scale(0)}
.rv-on .timeline li[data-rv].in::before{transform:none}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .scroll-progress{display:none}
}

@media(min-width:768px){.footer-grid.footer-grid-2{grid-template-columns:1.2fr 1fr}}