/* ============================================================
   阅读岛 · Reading Island
   Quiet / paper / e-ink — static stylesheet
   ============================================================ */

/* ---------- tokens ---------- */
:root{
  --bg:#FAFAF7;
  --surface:#ffffff;
  --ink:#15161a;
  --ink-2:#3a3b40;
  --muted:#75766f;
  --rule:#e6e4dd;
  --rule-soft:#efede6;
  --accent:#1f3a5f;        /* default 墨蓝 */
  --accent-tint:#eef1f6;
  --eink:#f4f1ea;
  --eink-ink:#1a1a1a;
  --eink-line:#d8d3c5;
  --eink-line-soft:#e7e4dc;
  --serif:"Source Serif 4","Noto Serif SC",ui-serif,Georgia,"Songti SC","SimSun",serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Helvetica Neue","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --maxw:1200px;
  --pad: clamp(20px,4vw,40px);
}
[data-accent="none"]   { --accent:#15161a; --accent-tint:#f1f0ea; }
[data-accent="ink"]    { --accent:#1f3a5f; --accent-tint:#eef1f6; }
[data-accent="red"]    { --accent:#8a2f2a; --accent-tint:#f6ecea; }
[data-accent="moss"]   { --accent:#3a5a3a; --accent-tint:#ecefe8; }

*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
body{font-size:16px;line-height:1.65;font-feature-settings:"palt"}
a{color:var(--accent);text-decoration:none;border-bottom:1px solid color-mix(in oklab, var(--accent) 35%, transparent);padding-bottom:1px}
a:hover{border-bottom-color:var(--accent)}
button{font-family:inherit}
code{font-family:var(--mono);font-size:.92em}

/* ---------- layout ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--pad)}
.rule{border-top:1px solid var(--rule)}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
h1,h2,h3{font-family:var(--serif);font-weight:500;letter-spacing:-.01em;margin:0;color:var(--ink)}
h1{font-size:clamp(40px,5.6vw,72px);line-height:1.05;letter-spacing:-.02em}
h2{font-size:clamp(28px,3.4vw,44px);line-height:1.15}
h3{font-size:20px;line-height:1.3;font-weight:600}
p{margin:0}
.lead{font-size:clamp(18px,1.6vw,22px);line-height:1.55;color:var(--ink-2);max-width:42em}

/* ---------- top nav ---------- */
header.nav{position:sticky;top:0;z-index:50;background:color-mix(in oklab,var(--bg) 92%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--rule)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:60px;gap:18px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--serif);font-size:18px;font-weight:600;letter-spacing:.01em;border:0;color:var(--ink)}
.brand-mark{width:26px;height:26px;border-radius:6px;background-image:url('app-icon.svg');background-size:cover;background-position:center;flex:0 0 auto;box-shadow:0 1px 2px rgba(0,0,0,.06),0 0 0 1px rgba(0,0,0,.04)}
.nav-links{display:flex;gap:28px;font-size:14px;color:var(--ink-2)}
.nav-links a{color:inherit;border:0}
.nav-links a:hover{color:var(--accent)}
.nav-cta{display:flex;align-items:center;gap:14px}
.badge{font-family:var(--mono);font-size:11px;letter-spacing:.08em;padding:4px 8px;border:1px solid var(--rule);border-radius:2px;color:var(--muted);white-space:nowrap}
.badge .dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent);margin-right:6px;vertical-align:1px}
@media(max-width:880px){.nav-links{display:none}}
@media(max-width:520px){.nav-cta .badge{display:none}}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 18px;border-radius:2px;border:1px solid var(--ink);background:var(--ink);color:var(--bg);font-size:14px;cursor:pointer;line-height:1;border-bottom-width:1px}
.btn:hover{background:var(--ink-2);border-color:var(--ink-2)}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn.ghost:hover{background:var(--ink);color:var(--bg)}
.btn.link{background:transparent;color:var(--ink);border:0;padding:12px 0;border-bottom:1px solid var(--ink);border-radius:0}
.btn.link:hover{color:var(--accent);border-bottom-color:var(--accent)}
.btn .arrow{font-family:var(--mono);font-weight:400}

/* ---------- HERO ---------- */
section.hero{padding:64px 0 40px;border-bottom:1px solid var(--rule)}
.hero-top{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:end}
.hero-meta{display:flex;align-items:center;gap:10px;margin-bottom:24px;flex-wrap:wrap}
.hero h1 .sub{display:block;font-size:clamp(22px,2.2vw,30px);color:var(--ink-2);font-weight:400;margin-top:18px;line-height:1.35;max-width:14ch}
.hero-desc{margin-top:28px;font-size:17px;line-height:1.65;color:var(--ink-2);max-width:34em}
.hero-ctas{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.hero-note{margin-top:18px;font-size:13px;color:var(--muted);font-family:var(--mono);letter-spacing:.02em}
.hero-aside{font-family:var(--sans);font-size:13.5px;color:var(--ink-2);line-height:1.7;border-left:1px solid var(--rule);padding-left:18px}
.hero-aside h4{margin:0 0 6px;font-family:var(--sans);font-size:13px;color:var(--ink);font-weight:600;letter-spacing:0}
.hero-aside h4 + p{margin-bottom:18px}
.hero-aside h4 + p:last-child{margin-bottom:0}
@media(max-width:880px){.hero-top{grid-template-columns:1fr;gap:24px}}

/* hero flow */
.flow{margin-top:64px;display:grid;grid-template-columns:1fr auto 1fr auto 1fr;align-items:center;gap:24px}
.flow-line{height:1px;background:var(--rule);position:relative}
.flow-line::after{content:"›";position:absolute;right:-2px;top:50%;transform:translateY(-50%);color:var(--muted);font-family:var(--mono);font-size:18px;background:var(--bg);padding-left:4px}
.flow-node{display:flex;flex-direction:column;align-items:center;gap:14px}
.flow-caption{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);text-align:center}
.flow-caption b{font-family:var(--sans);font-size:13px;color:var(--ink);font-weight:500;letter-spacing:0;text-transform:none;display:block;margin-top:4px}

/* ---------- devices: shells ---------- */
.dev-iphone{width:188px;height:386px;background:#0c0d0f;border-radius:34px;padding:7px;box-shadow:0 1px 0 #2a2b2e inset, 0 18px 36px -22px rgba(20,20,20,.35);flex:0 0 auto;position:relative}
.dev-iphone .screen{width:100%;height:100%;background:#fff;border-radius:27px;position:relative;overflow:hidden;display:flex;flex-direction:column}
.dev-iphone .notch{position:absolute;top:10px;left:50%;transform:translateX(-50%);width:84px;height:22px;background:#0c0d0f;border-radius:12px;z-index:3}

/* Boox-style e-ink phone */
.dev-boox{width:188px;height:408px;background:#1f1d1a;border-radius:14px;padding:10px 8px 22px;box-shadow:0 18px 36px -22px rgba(20,20,20,.35);position:relative;flex:0 0 auto}
.dev-boox .screen{width:100%;height:100%;background:var(--eink);border-radius:3px;position:relative;overflow:hidden;display:flex;flex-direction:column}
.dev-boox::after{content:"";position:absolute;left:50%;bottom:7px;transform:translateX(-50%);width:30px;height:4px;border:1px solid #666;border-radius:2px}

/* ---------- real screenshots inside device shells ---------- */
.dev-iphone.real .notch{display:none}
.dev-iphone.real .screen{background:#000}
.dev-boox.real .screen{background:var(--eink)}
.real-shot{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:top center;display:block}
/* macOS-style floating widget — already self-contained (rounded + shadow) */
.mac-shot{display:block;width:100%;max-width:300px;height:auto;border-radius:14px;filter:drop-shadow(0 22px 36px rgba(20,22,30,.18))}
.tri-frame.has-mac{align-items:center;padding:18px}
/* download card — Mac app icon thumb */
.dl-app-icon{width:56px;height:56px;border-radius:13px;background-image:url('app-icon.svg');background-size:cover;background-position:center;box-shadow:0 8px 18px -10px rgba(0,0,0,.25),0 0 0 1px rgba(0,0,0,.06);flex:0 0 auto}
.dl-app-icon.eink{background-image:url('app-icon-eink.svg');background-color:#fff;box-shadow:0 8px 18px -10px rgba(0,0,0,.18),0 0 0 1px rgba(0,0,0,.15)}
.dl-platform-row{display:flex;align-items:center;gap:14px;min-width:0}
.dl-platform-row .dl-platform{flex:1 1 auto;min-width:0}
.dl-platform .plat-tag{white-space:nowrap;flex:0 0 auto}

/* ---------- mockup chrome ---------- */
.ios-status{display:flex;align-items:center;justify-content:space-between;padding:13px 20px 4px;font-family:var(--sans);font-size:10px;font-weight:600;color:var(--ink);letter-spacing:.01em;flex:0 0 auto}
.ios-status .right{display:inline-flex;gap:4px;align-items:center}
.ios-status .sig{display:inline-flex;gap:1.5px;align-items:flex-end}
.ios-status .sig i{display:block;width:2.5px;background:var(--ink);border-radius:.5px}
.ios-status .sig i:nth-child(1){height:3px}.ios-status .sig i:nth-child(2){height:5px}
.ios-status .sig i:nth-child(3){height:7px}.ios-status .sig i:nth-child(4){height:9px}
.ios-status .batt{width:18px;height:9px;border:1px solid var(--ink);border-radius:2px;position:relative;padding:1px}
.ios-status .batt::after{content:"";position:absolute;right:-2.5px;top:50%;transform:translateY(-50%);width:1.5px;height:4px;background:var(--ink);border-radius:0 1px 1px 0}
.ios-status .batt i{display:block;width:78%;height:100%;background:var(--ink);border-radius:1px}

.eink-status{display:flex;align-items:center;justify-content:space-between;padding:8px 14px;font-family:var(--mono);font-size:9px;color:#555;letter-spacing:.05em;border-bottom:1px solid var(--eink-line);flex:0 0 auto}

/* iPhone screen body */
.iscreen{flex:1 1 auto;display:flex;flex-direction:column;padding:14px 16px 18px;gap:10px}
.iscreen .nav-title{font-family:var(--serif);font-size:18px;font-weight:600;color:var(--ink);line-height:1.2}
.iscreen .nav-sub{font-family:var(--mono);font-size:9px;color:var(--muted);letter-spacing:.08em;text-transform:uppercase;margin-bottom:6px}
.iscreen .field{border:1px solid var(--rule);border-radius:6px;padding:10px;background:#fafaf7;font-family:var(--serif);font-size:11.5px;color:var(--ink-2);line-height:1.5;text-wrap:pretty}
.iscreen .field .ttl{display:block;font-family:var(--serif);font-weight:600;color:var(--ink);font-size:12.5px;margin-bottom:5px;line-height:1.3}
.iscreen .meta-row{display:flex;justify-content:space-between;font-family:var(--mono);font-size:9px;color:var(--muted);letter-spacing:.04em}
.iscreen .chip-row{display:flex;flex-wrap:wrap;gap:5px}
.iscreen .chip{font-family:var(--mono);font-size:9px;border:1px solid var(--rule);border-radius:2px;padding:3px 6px;color:var(--ink-2);letter-spacing:.04em}
.iscreen .chip.on{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.iscreen .pair-row{display:flex;align-items:center;gap:8px;padding:8px 0;border-top:1px solid var(--rule)}
.iscreen .pair-dot{width:8px;height:8px;border-radius:50%;background:#3a7a3a;flex:0 0 auto;box-shadow:0 0 0 2px #eaf2e8}
.iscreen .pair-name{font-family:var(--serif);font-size:12px;color:var(--ink);font-weight:500;flex:1 1 auto;line-height:1.2}
.iscreen .pair-tag{font-family:var(--mono);font-size:9px;color:var(--muted);letter-spacing:.06em}
.iscreen .send-btn{margin-top:auto;background:var(--ink);color:var(--bg);font-family:var(--sans);font-size:12px;font-weight:500;padding:10px;border-radius:6px;text-align:center;letter-spacing:.02em}

/* iPhone — sending progress variant */
.iscreen.progress{justify-content:flex-start}
.iscreen .progress-block{margin-top:6px;border:1px solid var(--rule);border-radius:6px;padding:12px;background:#fff}
.iscreen .progress-block .step{display:grid;grid-template-columns:14px 1fr auto;gap:8px;align-items:center;font-family:var(--mono);font-size:10px;color:var(--ink-2);padding:5px 0;letter-spacing:.02em}
.iscreen .progress-block .step + .step{border-top:1px dashed var(--rule)}
.iscreen .progress-block .dot{width:6px;height:6px;border-radius:50%;background:#3a7a3a;justify-self:center}
.iscreen .progress-block .dot.now{background:var(--accent);box-shadow:0 0 0 3px color-mix(in oklab,var(--accent) 20%,transparent);animation:pulseDot 1.6s ease-out infinite}
.iscreen .progress-block .dot.pending{background:transparent;border:1px solid var(--rule)}
.iscreen .progress-block .ts{color:var(--muted);font-size:9px}
@keyframes pulseDot{0%,100%{opacity:1}50%{opacity:.45}}

/* Boox screen body */
.bscreen{flex:1 1 auto;display:flex;flex-direction:column;padding:16px 16px 14px;gap:10px;color:var(--eink-ink)}
.bscreen .b-eyebrow{font-family:var(--mono);font-size:9px;color:#666;letter-spacing:.12em;text-transform:uppercase}
.bscreen .b-title{font-family:var(--serif);font-weight:600;line-height:1.2;color:var(--eink-ink)}
.bscreen .b-body{font-family:var(--serif);font-size:11.5px;line-height:1.65;color:#1a1a1a;text-wrap:pretty}
.bscreen .b-body p + p{margin-top:6px;text-indent:2em}
.bscreen .b-rule{height:1px;background:var(--eink-line)}
.bscreen .b-meta{display:flex;justify-content:space-between;font-family:var(--mono);font-size:9px;color:#555;letter-spacing:.06em;margin-top:auto}
.bscreen .b-path{font-family:var(--mono);font-size:9.5px;color:#222;background:#ebe6d7;border:1px solid var(--eink-line);padding:5px 7px;border-radius:2px;letter-spacing:.02em}

/* Boox — large pairing code variant */
.bscreen.pair{align-items:stretch;justify-content:flex-start}
.bscreen.pair .b-code{font-family:var(--serif);font-weight:500;font-size:40px;letter-spacing:.12em;color:var(--eink-ink);text-align:center;line-height:1.1;margin-top:10px;font-feature-settings:"tnum"}
.bscreen.pair .b-code .sep{display:inline-block;width:.4em;color:#999}
.bscreen.pair .b-refresh{font-family:var(--mono);font-size:9px;color:#666;text-align:center;letter-spacing:.1em;margin-top:6px}
.bscreen.pair .b-hint{margin-top:14px;font-family:var(--serif);font-size:11px;line-height:1.55;color:#333;border-top:1px solid var(--eink-line);padding-top:10px}
.bscreen.pair .b-inbox{margin-top:auto;border:1px solid var(--eink-line);border-radius:2px;padding:8px 10px;background:#ede8d8}
.bscreen.pair .b-inbox .ttl{font-family:var(--mono);font-size:9px;color:#444;letter-spacing:.08em;text-transform:uppercase;margin-bottom:4px}
.bscreen.pair .b-inbox .item{font-family:var(--serif);font-size:11px;color:#1a1a1a;display:flex;justify-content:space-between;line-height:1.4}
.bscreen.pair .b-inbox .item + .item{margin-top:3px;padding-top:3px;border-top:1px dashed var(--eink-line)}
.bscreen.pair .b-inbox .item .t{color:#777;font-family:var(--mono);font-size:8.5px}

/* hero flow node disc */
.node{display:flex;flex-direction:column;align-items:center;gap:8px;text-align:center}
.node-disc{width:96px;height:96px;border:1px solid var(--ink);border-radius:50%;display:flex;align-items:center;justify-content:center;position:relative;background:var(--bg)}
.node-disc::before{content:"";position:absolute;inset:8px;border:1px dashed var(--rule);border-radius:50%}
.node-disc::after{content:"";width:22px;height:22px;background:var(--ink);border-radius:50%}
.node-pulse{position:absolute;inset:-6px;border:1px solid var(--accent);border-radius:50%;opacity:.4;animation:pulse 2.4s ease-out infinite}
@keyframes pulse{0%{transform:scale(.9);opacity:.5}100%{transform:scale(1.25);opacity:0}}
.node-label{font-family:var(--mono);font-size:11px;color:var(--muted);letter-spacing:.08em}
.node-label b{color:var(--ink);font-family:var(--sans);font-size:13px;display:block;letter-spacing:0;font-weight:500;margin-bottom:2px}

@media(max-width:880px){
  .flow{grid-template-columns:1fr;gap:18px;justify-items:center}
  .flow-line{width:1px;height:32px;align-self:center}
  .flow-line::after{right:50%;top:auto;bottom:-2px;transform:translateX(50%);content:"⌄"}
}

/* ---------- generic section ---------- */
section{padding:88px 0}
.section-head{display:grid;grid-template-columns:1fr 2fr;gap:48px;align-items:start;margin-bottom:48px}
.section-head .eyebrow{margin-bottom:16px;display:block}
.section-head .lead{margin-top:18px}
@media(max-width:880px){.section-head{grid-template-columns:1fr;gap:8px} section{padding:64px 0}}

/* ---------- 为什么 ---------- */
.why-list{display:grid;grid-template-columns:repeat(2,1fr);gap:0;border-top:1px solid var(--rule)}
.why-item{padding:32px 0;border-bottom:1px solid var(--rule);padding-right:32px}
.why-item:nth-child(odd){border-right:1px solid var(--rule);padding-right:32px}
.why-item:nth-child(even){padding-left:32px;padding-right:0}
.why-num{font-family:var(--mono);font-size:12px;color:var(--muted);letter-spacing:.1em;margin-bottom:14px}
.why-item h3{margin-bottom:10px}
.why-item p{color:var(--ink-2);font-size:15.5px}
@media(max-width:760px){.why-list{grid-template-columns:1fr}.why-item,.why-item:nth-child(odd){border-right:0;padding:24px 0}.why-item:nth-child(even){padding-left:0}}

/* ---------- scope (它解决什么 / 它不打算做什么) ---------- */
.scope{display:grid;grid-template-columns:1fr 1fr;gap:0;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.scope-col{padding:32px 32px 32px 0}
.scope-col + .scope-col{border-left:1px solid var(--rule);padding-left:32px;padding-right:0}
.scope-col h3{margin-bottom:14px}
.scope-col p{font-size:15.5px;color:var(--ink-2);line-height:1.7;max-width:32em}
.scope-mark{font-family:var(--mono);font-size:11px;color:var(--muted);letter-spacing:.1em;text-transform:uppercase;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.scope-mark::before{content:"";display:inline-block;width:18px;height:1px;background:var(--ink)}
@media(max-width:760px){.scope{grid-template-columns:1fr}.scope-col{padding:24px 0!important;border-left:0!important;border-bottom:1px solid var(--rule)}.scope-col:last-child{border-bottom:0}}

/* ---------- 工作方式 steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--rule)}
.step{padding:36px 28px 36px 0;border-right:1px solid var(--rule);position:relative}
.step:last-child{border-right:0;padding-right:0}
.step:not(:first-child){padding-left:28px}
.step-num{font-family:var(--serif);font-size:48px;color:var(--accent);line-height:1;margin-bottom:18px;font-weight:500}
.step h3{margin-bottom:8px}
.step p{color:var(--ink-2);font-size:15px}
.step-note{margin-top:18px;font-family:var(--mono);font-size:11px;color:var(--muted);letter-spacing:.02em;padding-top:12px;border-top:1px dashed var(--rule)}
.step-note code{font-family:var(--mono);font-size:13px;background:var(--accent-tint);color:var(--accent);padding:1px 6px;border-radius:2px}
@media(max-width:760px){.steps{grid-template-columns:1fr}.step{border-right:0;border-bottom:1px solid var(--rule);padding:24px 0!important}.step:last-child{border-bottom:0}}

/* ---------- 三端 ---------- */
.tri{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;align-items:start}
.tri-card{display:flex;flex-direction:column;gap:20px}
.tri-frame{height:360px;display:flex;align-items:center;justify-content:center;background:var(--accent-tint);border:1px solid var(--rule);border-radius:4px;padding:24px;overflow:hidden}
.tri-frame .dev-iphone{transform:scale(.85);transform-origin:center}
.tri-frame .dev-boox{transform:scale(.78);transform-origin:center}
.tri-card .tri-eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--muted);text-transform:uppercase}
.tri-card h3{margin-top:4px}
.tri-card ul{list-style:none;padding:0;margin:8px 0 0;font-size:14.5px;color:var(--ink-2)}
.tri-card li{padding:8px 0;border-bottom:1px solid var(--rule-soft);display:flex;gap:10px;align-items:baseline}
.tri-card li::before{content:"";width:4px;height:4px;background:var(--accent);border-radius:50%;flex:0 0 auto;transform:translateY(-2px)}
@media(max-width:880px){.tri{grid-template-columns:1fr;gap:32px}.tri-frame{height:340px}}

/* Mac menubar mini */
.menubar{background:#fff;border:1px solid var(--rule);border-radius:8px;width:100%;max-width:320px;overflow:hidden;font-size:12px;color:var(--ink);box-shadow:0 18px 32px -20px rgba(0,0,0,.2)}
.menubar-top{display:flex;align-items:center;gap:8px;padding:9px 12px;background:#f4f1ea;border-bottom:1px solid var(--rule);font-family:var(--mono);font-size:10.5px;color:var(--muted)}
.menubar-top .mb-mark{width:11px;height:11px;border-radius:50%;border:1.2px solid var(--ink);position:relative}
.menubar-top .mb-mark::after{content:"";position:absolute;inset:2px;background:var(--ink);border-radius:50%}
.menubar-top .mb-title{color:var(--ink);font-family:var(--sans);font-weight:500;font-size:11px;letter-spacing:0}
.menubar-top .mb-shortcut{margin-left:auto;font-family:var(--mono);font-size:10px;color:var(--muted)}
.menubar-row{padding:10px 12px;border-bottom:1px solid var(--rule-soft);font-size:12px}
.menubar-row:last-child{border-bottom:0}
.menubar-row .lbl{font-family:var(--mono);font-size:10px;color:var(--muted);letter-spacing:.06em;text-transform:uppercase;display:block;margin-bottom:5px}
.menubar-row .recipient{display:flex;align-items:center;gap:8px;font-family:var(--serif);font-size:12.5px;color:var(--ink)}
.menubar-row .recipient .pdot{width:7px;height:7px;border-radius:50%;background:#3a7a3a;box-shadow:0 0 0 2px #eaf2e8}
.menubar-row .recipient .tag{margin-left:auto;font-family:var(--mono);font-size:9px;color:var(--muted);letter-spacing:.06em}
.menubar-row .content-preview{font-family:var(--serif);font-size:12px;color:var(--ink-2);line-height:1.5;max-height:3.6em;overflow:hidden;text-wrap:pretty}
.menubar-row .content-preview b{font-weight:600;color:var(--ink);display:block;margin-bottom:2px}
.menubar-formats{display:flex;gap:6px;padding:8px 12px;background:#fafaf7;border-bottom:1px solid var(--rule-soft)}
.menubar-formats span{font-family:var(--mono);font-size:10px;border:1px solid var(--rule);border-radius:2px;padding:3px 7px;color:var(--ink-2);letter-spacing:.04em}
.menubar-formats span.on{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.menubar-send{display:flex;justify-content:space-between;align-items:center;padding:10px 12px;background:#fafaf7}
.menubar-send .k{font-family:var(--mono);font-size:10px;color:var(--muted);letter-spacing:.04em}
.menubar-send .b{font-size:11px;background:var(--ink);color:var(--bg);padding:5px 12px;border-radius:3px;font-family:var(--sans);letter-spacing:.04em;font-weight:500}

/* ---------- 适合谁 ---------- */
.who{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.who-card{padding:24px 20px;border:1px solid var(--rule);border-radius:3px;background:var(--surface)}
.who-card .icon{font-family:var(--serif);font-size:22px;color:var(--accent);margin-bottom:14px;letter-spacing:0}
.who-card h3{font-size:16px;margin-bottom:6px;font-weight:600}
.who-card p{font-size:14px;color:var(--muted);line-height:1.55}
@media(max-width:760px){.who{grid-template-columns:1fr 1fr;gap:14px}}
@media(max-width:480px){.who{grid-template-columns:1fr}}

/* ---------- 可靠性 ---------- */
.reliable{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.reliable .pipe{border-left:1px solid var(--rule);padding-left:0}
.pipe-step{display:grid;grid-template-columns:90px 1fr;gap:24px;padding:18px 0 18px 24px;border-bottom:1px solid var(--rule);position:relative}
.pipe-step::before{content:"";position:absolute;left:-4px;top:28px;width:7px;height:7px;border-radius:50%;background:var(--bg);border:1.5px solid var(--accent)}
.pipe-step:last-child{border-bottom:0}
.pipe-key{font-family:var(--mono);font-size:11px;color:var(--muted);letter-spacing:.08em;text-transform:uppercase;padding-top:2px}
.pipe-step h3{font-size:16px;font-weight:600;margin-bottom:4px}
.pipe-step p{font-size:14px;color:var(--ink-2)}
.reliable-quote{font-family:var(--serif);font-size:22px;line-height:1.5;color:var(--ink);max-width:24em;margin-bottom:24px;text-wrap:pretty;font-weight:400}
.reliable-quote::before{content:"";display:block;width:36px;height:1px;background:var(--ink);margin-bottom:24px}
.reliable-sub{font-size:14px;color:var(--muted);font-family:var(--mono);letter-spacing:.02em;line-height:1.7}
@media(max-width:880px){.reliable{grid-template-columns:1fr;gap:32px}}

/* ---------- 下载 ---------- */
.dl{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;border-top:1px solid var(--ink);border-bottom:1px solid var(--rule)}
.dl-col{padding:36px 28px 36px 0;border-right:1px solid var(--rule);display:flex;flex-direction:column;gap:16px;min-width:0}
.dl-col:last-child{border-right:0;padding-right:0}
.dl-col:not(:first-child){padding-left:28px}
.dl-platform{display:flex;align-items:center;justify-content:space-between}
.dl-platform .plat-name{font-family:var(--serif);font-size:22px;font-weight:500}
.dl-platform .plat-tag{font-family:var(--mono);font-size:10px;color:var(--accent);background:var(--accent-tint);padding:3px 7px;border-radius:2px;letter-spacing:.06em}
.dl-meta{font-family:var(--mono);font-size:11px;color:var(--muted);letter-spacing:.04em;line-height:1.7}
.dl-action{margin-top:auto;padding-top:18px}
.dl-steps{font-size:13.5px;color:var(--ink-2);counter-reset:s;padding-left:0;list-style:none;margin:0}
.dl-steps li{counter-increment:s;display:grid;grid-template-columns:22px 1fr;gap:8px;padding:6px 0;border-top:1px dashed var(--rule)}
.dl-steps li:first-child{border-top:0}
.dl-steps li::before{content:counter(s,decimal-leading-zero);font-family:var(--mono);font-size:11px;color:var(--muted);padding-top:2px}
@media(max-width:760px){.dl{grid-template-columns:1fr}.dl-col{border-right:0!important;border-bottom:1px solid var(--rule);padding:28px 0!important}.dl-col:last-child{border-bottom:0}}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--rule)}
.faq details{border-bottom:1px solid var(--rule);padding:0}
.faq summary{cursor:pointer;list-style:none;padding:22px 0;display:flex;justify-content:space-between;align-items:baseline;gap:24px;font-family:var(--serif);font-size:19px;font-weight:500;color:var(--ink);line-height:1.4}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--mono);font-size:20px;color:var(--muted);transition:transform .2s;font-weight:300;flex:0 0 auto}
.faq details[open] summary::after{content:"–"}
.faq .a{padding:0 0 24px 0;color:var(--ink-2);font-size:15.5px;max-width:62ch;line-height:1.75}
.faq .a a{font-size:inherit}
.faq .a code{font-family:var(--mono);background:var(--accent-tint);color:var(--accent);padding:1px 6px;border-radius:2px;font-size:13.5px}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--ink);padding:56px 0 40px;margin-top:64px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;align-items:start}
.foot-brand .brand{margin-bottom:14px}
.foot-brand p{font-size:13.5px;color:var(--muted);max-width:30em;line-height:1.7}
.foot-brand p strong{color:var(--ink-2);font-weight:500}
.foot-col h4{font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--muted);font-weight:500;text-transform:uppercase;margin:0 0 14px}
.foot-col ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px;font-size:14px}
.foot-col a{color:var(--ink-2);border:0}
.foot-col a:hover{color:var(--accent)}
.foot-bottom{margin-top:48px;padding-top:20px;border-top:1px solid var(--rule);display:flex;justify-content:space-between;align-items:center;font-family:var(--mono);font-size:11px;color:var(--muted);letter-spacing:.04em;gap:12px;flex-wrap:wrap}
.foot-bottom .status .dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:#3a7a3a;margin-right:6px;vertical-align:1px}
@media(max-width:760px){.foot-grid{grid-template-columns:1fr 1fr;gap:32px}.foot-brand{grid-column:1/-1}.foot-bottom{flex-direction:column;align-items:flex-start;gap:8px}}

/* ---------- Tweaks ---------- */
#tweaks{position:fixed;right:20px;bottom:20px;width:260px;background:var(--surface);border:1px solid var(--ink);border-radius:4px;padding:18px;font-size:13px;z-index:100;box-shadow:0 8px 24px -8px rgba(0,0,0,.15);display:none}
#tweaks.open{display:block}
#tweaks .t-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--rule)}
#tweaks h4{margin:0;font-family:var(--serif);font-size:15px;font-weight:600}
#tweaks .t-close{border:0;background:transparent;cursor:pointer;font-family:var(--mono);font-size:18px;color:var(--muted);padding:0;line-height:1}
#tweaks .t-section{margin-bottom:4px}
#tweaks .t-label{font-family:var(--mono);font-size:10px;letter-spacing:.1em;color:var(--muted);text-transform:uppercase;margin-bottom:8px}
#tweaks .t-swatches{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
#tweaks .sw{cursor:pointer;border:1px solid var(--rule);border-radius:3px;padding:8px 6px;background:var(--surface);display:flex;flex-direction:column;align-items:center;gap:6px;font-size:11px;color:var(--ink-2);font-family:var(--sans)}
#tweaks .sw[aria-pressed=true]{border-color:var(--ink);background:var(--accent-tint)}
#tweaks .sw .chip{width:18px;height:18px;border-radius:50%;border:1px solid rgba(0,0,0,.1)}

/* ---------- small-screen polish ---------- */
@media(max-width:520px){
  body{font-size:15.5px}
  section.hero{padding:40px 0 24px}
  .hero-ctas{gap:8px}
  .hero-ctas .btn{padding:11px 14px;font-size:13.5px}
  .flow{margin-top:36px}
  .tri-frame{height:320px;padding:16px}
}