/* K酱 官网 · 2026 重构
   品牌：暖纸 / 墨色 / 朱红；内容优先，交互克制 */
:root{
  --paper:#f6f2ea;
  --paper-soft:#eee8dc;
  --surface:#fffdf8;
  --ink:#211f1c;
  --ink-soft:#5f5951;
  --muted:#81796e;
  --line:#ddd4c6;
  --line-dark:#3d3732;
  --accent:#9e2b25;
  --accent-strong:#7f1f1a;
  --accent-soft:#ead8d3;
  --night:#181614;
  --night-soft:#25211e;
  --ok:#3f7455;
  --bad:#a3463d;
  --radius:22px;
  --radius-sm:13px;
  --container:1180px;
  --header:72px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow:0 24px 70px rgba(52,39,31,.09);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.34;
  background-image:linear-gradient(rgba(94,78,65,.055) 1px,transparent 1px);
  background-size:100% 8px;
}
img{max-width:100%;display:block}
a{color:inherit}
button{font:inherit;color:inherit}
:focus-visible{outline:3px solid rgba(158,43,37,.45);outline-offset:4px;border-radius:6px}
::selection{background:var(--accent);color:#fff}
.skip{position:absolute;left:18px;top:-80px;z-index:100;background:var(--ink);color:var(--paper);padding:10px 14px;border-radius:10px;transition:top .2s var(--ease)}
.skip:focus{top:14px}
.container{width:min(var(--container),calc(100% - 48px));margin-inline:auto}
.scroll-progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:80;pointer-events:none;background:transparent}
.scroll-progress i{display:block;width:0;height:100%;background:var(--accent);transition:width .08s linear}

/* Header */
.site-header{
  position:sticky;top:0;z-index:50;background:rgba(246,242,234,.88);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(221,212,198,.65);
  transition:box-shadow .25s var(--ease),background .25s var(--ease);
}
.site-header.is-scrolled{background:rgba(246,242,234,.96);box-shadow:0 8px 30px rgba(49,38,30,.07)}
.header-inner{width:min(1240px,calc(100% - 40px));height:var(--header);margin:auto;display:flex;align-items:center;gap:34px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;font-weight:750;letter-spacing:-.02em;line-height:1}
.brand img{width:34px;height:34px;object-fit:cover;border-radius:10px;border:1px solid var(--line);filter:saturate(.78) contrast(1.02)}
.brand span{font-size:20px}
.brand small{font-size:12px;color:var(--muted);font-weight:500;margin-top:3px;margin-left:2px}
.site-nav{display:flex;align-items:center;gap:5px;margin-left:auto}
.site-nav a{
  position:relative;text-decoration:none;color:var(--ink-soft);font-size:14px;line-height:1;
  padding:12px 13px;border-radius:10px;transition:color .18s var(--ease),background .18s var(--ease);
}
.site-nav a:hover{color:var(--ink);background:rgba(158,43,37,.06)}
.site-nav a.active{color:var(--accent)}
.site-nav a.active::after{content:"";position:absolute;left:13px;right:13px;bottom:6px;height:2px;border-radius:2px;background:var(--accent)}
.nav-action{
  flex:none;display:inline-flex;align-items:center;justify-content:center;min-height:44px;
  text-decoration:none;background:var(--ink);color:#fff;border-radius:999px;
  padding:11px 18px;font-size:14px;font-weight:700;line-height:1;
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.nav-action:hover{background:var(--accent);transform:translateY(-1px)}
.nav-action:active{transform:translateY(0)}
.mobile-menu{display:none;position:relative}
.mobile-menu summary{
  list-style:none;width:44px;height:44px;border:1px solid var(--line);border-radius:11px;
  display:grid;place-items:center;cursor:pointer;color:var(--ink-soft);font-size:12px;font-weight:750;
  transition:border-color .18s var(--ease),background .18s var(--ease);
}
.mobile-menu summary::-webkit-details-marker{display:none}
.mobile-menu summary:hover{border-color:#cbbfaf;background:var(--surface)}
.mobile-menu[open] summary{border-color:var(--ink);background:var(--surface);color:var(--ink)}
.mobile-menu nav{
  position:absolute;right:0;top:calc(100% + 10px);z-index:70;width:190px;padding:8px;
  background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);
}
.mobile-menu nav a{display:block;padding:12px 13px;border-radius:9px;text-decoration:none;font-size:14px;color:var(--ink-soft)}
.mobile-menu nav a:hover{background:var(--paper-soft);color:var(--ink)}

/* Typography */
.eyebrow{
  margin:0 0 16px;color:var(--accent);font-size:12px;font-weight:800;
  letter-spacing:.13em;text-transform:uppercase;
}
h1,h2,h3{margin:0;color:var(--ink);text-wrap:balance}
h1{
  font-family:"Noto Serif SC","Songti SC",SimSun,serif;
  font-size:clamp(44px,5.4vw,68px);line-height:1.12;letter-spacing:-.045em;font-weight:700;
}
h2{
  font-family:"Noto Serif SC","Songti SC",SimSun,serif;
  font-size:clamp(30px,4.2vw,54px);line-height:1.18;letter-spacing:-.035em;font-weight:700;
}
h3{font-size:clamp(21px,2vw,27px);line-height:1.3;letter-spacing:-.02em}
p{margin:0;color:var(--ink-soft)}
.section{padding:clamp(78px,9vw,132px) 0}
section[id]{scroll-margin-top:calc(var(--header) + 18px)}
.section-heading{max-width:none;margin-bottom:44px}
.section-heading p:last-child{margin-top:18px;max-width:650px}
.section-copy p{max-width:590px}
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(420px,1fr);gap:clamp(48px,7vw,100px);align-items:center}
.split.compact{grid-template-columns:minmax(260px,.8fr) minmax(0,1.4fr);align-items:start}
.text-list{list-style:none;margin:28px 0 0;padding:0;display:grid;gap:13px;color:var(--ink-soft)}
.text-list li{position:relative;padding-left:22px}
.text-list li::before{content:"";position:absolute;left:0;top:.72em;width:7px;height:7px;border-radius:50%;background:var(--accent)}
.text-link{
  display:inline-flex;align-items:center;gap:7px;color:var(--accent);font-weight:750;text-decoration:none;
  border-bottom:1px solid rgba(158,43,37,.28);padding-bottom:3px;transition:border-color .2s var(--ease),color .2s var(--ease);
}
.text-link::after{content:"→";transition:transform .2s var(--ease)}
.text-link:hover{color:var(--accent-strong);border-color:var(--accent)}
.text-link:hover::after{transform:translateX(3px)}
.text-button{
  display:inline-flex;align-items:center;min-height:44px;border:0;background:transparent;color:var(--accent);
  font-weight:750;cursor:pointer;padding:10px 0;border-bottom:1px solid rgba(158,43,37,.35);
}
.text-button:hover{color:var(--accent-strong)}

/* Buttons */
.button{
  display:inline-flex;align-items:center;justify-content:center;gap:12px;min-height:54px;
  padding:14px 22px;border-radius:14px;text-decoration:none;font-weight:750;line-height:1.2;
  transition:transform .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
  will-change:transform;
}
.button small{font-size:12px;font-weight:600;opacity:.68}
.button:hover{transform:translateY(-2px)}
.button:active{transform:translateY(0) scale(.99)}
.button.primary{background:var(--accent);color:#fff;box-shadow:0 12px 28px rgba(158,43,37,.18)}
.button.primary:hover{background:var(--accent-strong);box-shadow:0 16px 34px rgba(127,31,26,.22)}
.button.secondary{background:transparent;color:var(--ink);border:1px solid var(--line)}
.button.secondary:hover{border-color:var(--ink);background:var(--surface)}
.button-light{background:var(--paper);color:var(--ink)}
.button-light:hover{background:#fff}
.button.wide{width:100%;margin-top:auto}

/* Hero */
.hero{padding:clamp(64px,8vw,110px) 0 clamp(70px,8vw,112px);overflow:hidden}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.02fr) minmax(430px,.88fr);gap:clamp(44px,6vw,82px);align-items:center}
.hero-copy{padding-top:8px}
.hero-lede{max-width:620px;margin-top:26px;font-size:clamp(17px,1.45vw,20px);line-height:1.8}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px}
.hero-metrics{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin:42px 0 0;padding:22px 0 0;
  border-top:1px solid var(--line);
}
.hero-metrics div{min-width:0;padding-right:16px}
.hero-metrics div + div{border-left:1px solid var(--line);padding-left:18px}
.hero-metrics dt{font-size:clamp(19px,1.8vw,25px);font-weight:800;letter-spacing:-.03em;color:var(--ink);font-variant-numeric:tabular-nums}
.hero-metrics dd{margin:4px 0 0;font-size:12px;color:var(--muted)}

/* Schedule card */
.schedule-card{
  position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);overflow:hidden;transform:rotate(.6deg);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.schedule-card:hover{transform:rotate(0) translateY(-4px);box-shadow:0 30px 80px rgba(52,39,31,.12)}
.schedule-card::before{content:"";position:absolute;inset:0 0 auto;height:5px;background:var(--accent)}
.card-topline{display:flex;justify-content:space-between;align-items:end;gap:20px;padding:28px 28px 22px}
.card-kicker{margin:0 0 5px;color:var(--accent);font-size:11px;font-weight:800;letter-spacing:.13em;text-transform:uppercase}
.card-topline h2{font-size:25px;letter-spacing:-.03em}
.schedule-count{display:flex;flex:none;align-items:baseline;gap:6px;margin:0;font-size:13px;color:var(--muted);white-space:nowrap}
.schedule-count strong{font-size:25px;color:var(--ink);font-variant-numeric:tabular-nums}
.day-tabs{display:grid;grid-template-columns:repeat(7,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.day-tabs button{
  border:0;border-right:1px solid var(--line);background:transparent;color:var(--ink-soft);
  min-height:46px;cursor:pointer;font-size:14px;font-weight:700;transition:background .18s var(--ease),color .18s var(--ease);
}
.day-tabs button:last-child{border-right:0}
.day-tabs button:hover{background:var(--paper-soft);color:var(--ink)}
.day-tabs button[aria-selected="true"]{background:var(--ink);color:#fff}
.schedule-list{list-style:none;margin:0;padding:10px 0;min-height:318px}
.schedule-list li{
  display:grid;grid-template-columns:minmax(0,1fr) auto auto;gap:14px;align-items:center;
  padding:11px 28px;min-height:42px;font-size:14px;
}
.schedule-list li:hover{background:var(--paper-soft)}
.schedule-list .nm{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--ink)}
.schedule-list .sc{color:var(--accent);font-weight:800;font-variant-numeric:tabular-nums}
.schedule-list .ep{color:var(--muted);font-size:12px;white-space:nowrap}
.schedule-list .empty{grid-template-columns:1fr;color:var(--muted)}
.schedule-foot{display:flex;justify-content:space-between;gap:20px;padding:15px 28px;border-top:1px solid var(--line);color:var(--muted);font-size:12px}

/* Flow */
.flow-strip{border-block:1px solid var(--line);background:rgba(255,253,248,.42);padding:34px 0}
.flow-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.flow-step{position:relative;padding-left:52px}
.flow-step span{
  position:absolute;left:0;top:2px;width:34px;height:34px;border-radius:50%;
  display:grid;place-items:center;background:var(--accent-soft);color:var(--accent);font-size:12px;font-weight:800;
}
.flow-step h2{font-family:inherit;font-size:19px;letter-spacing:-.02em}
.flow-step p{margin-top:7px;font-size:14px;line-height:1.7}

/* Lines */
.lines{background:var(--paper-soft);border-block:1px solid var(--line)}
.probe-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.probe-head{display:flex;justify-content:space-between;align-items:end;gap:20px;padding:28px;border-bottom:1px solid var(--line)}
.probe-head h3{font-size:24px}
.probe-head p{font-variant-numeric:tabular-nums;color:var(--muted)}
.probe-head strong{font-size:34px;line-height:1;color:var(--accent);font-variant-numeric:tabular-nums}
.probe-grid{display:grid;grid-template-columns:repeat(11,1fr);gap:7px;padding:28px;min-height:196px}
.probe-cell{aspect-ratio:1;border-radius:5px;background:#e3dcd1;transition:background .22s var(--ease),transform .22s var(--ease)}
.probe-cell.testing{background:#cbbfae;transform:scale(.82)}
.probe-cell.ok{background:var(--accent)}
.probe-cell.bad{background:#d8d1c7}
.probe-foot{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:20px 28px;border-top:1px solid var(--line)}
.probe-foot p{font-size:14px;color:var(--muted)}

/* Switch demo */
.switch-section{background:var(--night);color:#f7f2ea}
.switch-section h2{color:#fffaf1}
.switch-section p{color:#b7aea4}
.switch-section .eyebrow{color:#e6a098}
.switch-panel{display:grid;grid-template-columns:minmax(0,.88fr) minmax(430px,1.12fr);gap:clamp(44px,7vw,94px);align-items:center}
.switch-copy p{margin:24px 0 34px;max-width:510px}
.switch-demo{background:var(--night-soft);border:1px solid var(--line-dark);border-radius:var(--radius);overflow:hidden}
.switch-stage{
  height:270px;background:#0e0d0c;position:relative;display:grid;place-items:center;overflow:hidden;
}
.stage-line{position:absolute;left:0;right:0;top:50%;height:1px;background:rgba(255,255,255,.09)}
.switch-stage strong{position:relative;font-size:18px;font-weight:650;color:#fffaf1;text-align:center;padding:0 28px}
.switch-stage::after{
  content:"";position:absolute;left:10%;right:10%;bottom:54px;height:34px;border-radius:50%;
  background:rgba(158,43,37,.18);filter:blur(22px);opacity:0;transition:opacity .35s var(--ease);
}
.switch-stage.is-playing::after{opacity:1}
.switch-steps{list-style:none;margin:0;padding:12px}
.switch-steps li{
  display:flex;justify-content:space-between;gap:20px;padding:14px 16px;border-radius:12px;
  color:#b7aea4;font-size:14px;transition:background .22s var(--ease),color .22s var(--ease);
}
.switch-steps li + li{margin-top:4px}
.switch-steps li[data-state="checking"]{background:rgba(255,255,255,.07);color:#fffaf1}
.switch-steps li[data-state="failed"] span{color:#e0a39c}
.switch-steps li[data-state="success"]{background:rgba(103,147,120,.16);color:#fffaf1}
.switch-steps li[data-state="success"] span{color:#9fd0ae}

/* Features */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.feature-card{
  display:flex;flex-direction:column;min-height:100%;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius);padding:14px 14px 24px;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.feature-card:hover{transform:translateY(-5px);border-color:#cfc3b3;box-shadow:0 20px 55px rgba(52,39,31,.1)}
.feature-card h3{font-size:20px;margin:22px 10px 9px}
.feature-card p{margin:0 10px;font-size:14px;line-height:1.75}
.feature-visual{height:170px;border-radius:15px;overflow:hidden;position:relative;background:var(--night);color:#fff}
.feature-visual.danmaku{background:#181614;overflow:hidden;-webkit-mask-image:linear-gradient(to right,transparent 0,#000 7%,#000 93%,transparent 100%);mask-image:linear-gradient(to right,transparent 0,#000 7%,#000 93%,transparent 100%)}
.danmaku-lane{position:absolute;left:0;display:flex;width:max-content;animation:danmaku-scroll linear infinite;animation-play-state:paused}
.danmaku.is-running .danmaku-lane{animation-play-state:running;will-change:transform}
.feature-card:hover .danmaku.is-running .danmaku-lane{animation-play-state:paused}
.danmaku-group{display:flex;align-items:center;gap:28px;padding-right:28px;flex:none;white-space:nowrap}
.danmaku-group span{
  display:block;padding:6px 10px;border:1px solid rgba(255,255,255,.12);border-radius:999px;
  background:rgba(255,255,255,.065);font-size:12px;line-height:1.45;color:#f3ece3;
}
.danmaku-lane.lane-1{top:25px;animation-duration:24s;animation-delay:-5s}
.danmaku-lane.lane-2{top:73px;animation-duration:30s;animation-delay:-19s}
.danmaku-lane.lane-2 span{color:#f2bbb4;border-color:rgba(242,187,180,.18)}
.danmaku-lane.lane-3{top:121px;animation-duration:20s;animation-delay:-8s}
.danmaku-lane.lane-3 span{color:#e8d8c7;border-color:rgba(232,216,199,.16)}
@keyframes danmaku-scroll{from{transform:translate3d(0,0,0)}to{transform:translate3d(-50%,0,0)}}
.feature-visual.cache{display:flex;align-items:center;padding:0 22px}
.feature-visual.cache span{height:8px;width:100%;background:rgba(255,255,255,.13);border-radius:99px;position:relative;overflow:hidden}
.feature-visual.cache span::before{content:"";position:absolute;inset:0;width:68%;background:var(--accent);border-radius:inherit}
.feature-visual.update,.feature-visual.privacy{display:grid;place-content:center;text-align:center;gap:8px}
.feature-visual.update b,.feature-visual.privacy b{font-size:25px}
.feature-visual span{font-size:13px;color:#b7aea4}
.feature-visual.privacy{background:var(--accent)}
.feature-visual.privacy span{color:#f4d4d0}

/* Download */
.download{background:var(--paper-soft);border-block:1px solid var(--line)}
.download-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.download-card{
  min-height:380px;display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:calc(var(--radius) + 4px);padding:clamp(26px,4vw,42px);position:relative;overflow:hidden;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.download-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cfc3b3}
.download-card::after{
  content:"";position:absolute;right:-74px;top:-74px;width:220px;height:220px;border-radius:50%;
  border:1px solid rgba(158,43,37,.16);box-shadow:0 0 0 36px rgba(158,43,37,.045);
}
.platform-tag{margin:0 0 18px;color:var(--accent);font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}
.download-card h3{font-size:clamp(28px,3vw,39px)}
.download-card > p:not(.platform-tag){margin-top:14px;max-width:500px}
.download-meta{display:flex;flex-wrap:wrap;gap:8px;margin:28px 0}
.download-meta span{border:1px solid var(--line);border-radius:999px;padding:6px 10px;color:var(--muted);font-size:12px;font-weight:650}

/* Log */
.log-list{border-top:1px solid var(--line)}
.log-list article{display:grid;grid-template-columns:90px 1fr;gap:22px;padding:22px 0;border-bottom:1px solid var(--line)}
.log-list strong{color:var(--accent);font-size:14px;font-variant-numeric:tabular-nums}
.log-list p{font-size:14px;line-height:1.75}
.log-list .text-link{margin-top:18px}

/* FAQ */
.faq-list details{border-bottom:1px solid var(--line)}
.faq-list details:first-child{border-top:1px solid var(--line)}
.faq-list summary{
  list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:22px;
  padding:22px 0;font-weight:750;font-size:17px;transition:color .18s var(--ease);
}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"+";flex:none;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:var(--paper-soft);color:var(--accent);font-weight:500;transition:transform .22s var(--ease),background .22s var(--ease)}
.faq-list details[open] summary::after{transform:rotate(45deg);background:var(--accent-soft)}
.faq-list summary:hover{color:var(--accent)}
.faq-list p{padding:0 44px 24px 0;max-width:760px;font-size:15px;line-height:1.85;animation:rowIn .26s var(--ease)}

/* Closing */
.closing{padding:clamp(80px,9vw,130px) 0 0}
.closing-grid{display:flex;justify-content:space-between;align-items:end;gap:40px;padding-bottom:clamp(44px,6vw,70px)}
.closing-actions{display:flex;align-items:center;gap:24px;flex:none}
.closing h2{max-width:650px}
.disclaimer{border-top:1px solid var(--line);padding:28px 0;display:grid;gap:7px}
.disclaimer p{font-size:13px;color:var(--muted)}

/* Footer */
.site-footer{background:var(--night);color:#e9e1d7;padding:56px 0 42px}
.footer-grid{display:grid;grid-template-columns:1.3fr repeat(4,1fr);gap:32px;align-items:start}
.footer-identity{display:grid;gap:2px;align-content:start}
.footer-identity .footer-brand{display:block;font-family:"Noto Serif SC","Songti SC",SimSun,serif;font-size:52px;line-height:1;font-weight:700;letter-spacing:-.05em;text-decoration:none;color:#fffaf1}
.footer-identity .footer-email{display:inline-flex;align-items:center;gap:7px;width:max-content;min-height:44px;color:#b8ada1;text-decoration:none;transition:color .18s var(--ease)}
.footer-identity .footer-email:hover{color:#fffaf1}
.footer-identity .footer-email span{color:#80766b;font-size:11px;letter-spacing:.08em}
.footer-grid div{display:grid;gap:7px}
.footer-grid b{font-size:13px;color:#fffaf1;margin-bottom:5px}
.footer-grid a,.footer-grid span{color:#a79d92;text-decoration:none;font-size:13px;line-height:1.5}
.footer-grid a:hover{color:#fffaf1}

/* Motion */
.reveal{opacity:1;transform:none}
html.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .55s var(--ease),transform .55s var(--ease)}
html.js .reveal.in{opacity:1;transform:none}
@keyframes rowIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* Responsive */
@media (max-width:1080px){
  .hero-grid,.split,.switch-panel{grid-template-columns:1fr}
  .schedule-card{max-width:720px;transform:none}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .split.compact{grid-template-columns:1fr;gap:26px}
}
@media (max-width:820px){
  :root{--header:64px;--radius:18px}
  .container,.header-inner{width:calc(100% - 32px)}
  .site-nav{display:none}
  .header-inner{gap:12px}
  .brand small{display:none}
  .nav-action{margin-left:auto;padding:10px 15px;font-size:13px}
  .mobile-menu{display:block}
  .hero{padding:48px 0 62px}
  .hero-grid{gap:36px}
  h1{font-size:clamp(38px,12vw,56px)}
  h2{font-size:clamp(28px,8vw,38px)}
  .hero-lede{margin-top:20px;font-size:16px;line-height:1.75}
  .hero-actions{display:grid;grid-template-columns:1fr}
  .hero-metrics{grid-template-columns:repeat(2,1fr);gap:18px 0;margin-top:32px}
  .hero-metrics div + div{border-left:0;padding-left:0}
  .hero-metrics div:nth-child(even){border-left:1px solid var(--line);padding-left:16px}
  .flow-grid{grid-template-columns:1fr;gap:24px}
  .probe-head,.probe-grid{padding-inline:20px}
  .probe-foot{padding-inline:20px;align-items:flex-start;flex-direction:column;gap:10px}
  .switch-stage{height:220px}
  .feature-grid,.download-grid{grid-template-columns:1fr}
  .download-card{min-height:0}
  .log-list article{grid-template-columns:1fr;gap:5px;padding:19px 0}
  .closing-grid{display:grid;align-items:start}
  .closing-actions{flex-wrap:wrap}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-identity{grid-column:1/-1}
  .footer-identity .footer-brand{font-size:46px}
}
@media (max-width:520px){
  .section{padding:64px 0}
  .card-topline{padding:22px 18px 18px;align-items:start;flex-direction:column;gap:10px}
  .schedule-list li{padding:10px 18px;grid-template-columns:minmax(0,1fr) auto}
  .schedule-list .ep{display:none}
  .schedule-foot{padding:13px 18px;flex-direction:column;gap:3px}
  .day-tabs button{font-size:13px;min-height:46px}
  .probe-grid{grid-template-columns:repeat(8,1fr);gap:6px}
  .feature-visual{height:150px}
  .danmaku-lane.lane-1{top:20px}
  .danmaku-lane.lane-2{top:61px}
  .danmaku-lane.lane-3{top:102px}
  .footer-grid{grid-template-columns:1fr}
  .faq-list summary{font-size:16px;padding:19px 0}
  .closing-actions{width:100%;display:grid}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  html.js .reveal{opacity:1;transform:none}
  .feature-visual.danmaku{display:flex;flex-direction:column;justify-content:center;gap:8px;padding:18px;-webkit-mask-image:none;mask-image:none}
  .danmaku-lane{position:static;display:block;width:100%;animation:none!important;transform:none!important;will-change:auto}
  .danmaku-group{display:block;padding:0}
  .danmaku-group:nth-child(2){display:none}
  .danmaku-group span{display:block;width:max-content;max-width:100%;margin:0}
  .danmaku-group span:not(:first-child){display:none}
}