/* =========================================================
   拾影 Shiyin — 极简科技人文风 · 浅米灰 · 手绘线稿 · 点彩
   ========================================================= */

:root{
  --paper:#f5f5f5;            /* 页面底色（浅灰白） */
  --card:#ffffff;
  --ink:#23211e;              /* 手绘墨线色（暖黑） */
  --ink-soft:#6e6a61;
  --ink-faint:#a9a293;
  --line:#e6e1d4;             /* 发丝分隔线 */
  --line-strong:#d8d2c1;
  --warm:#faf6ee;             /* 卡片内米色底 */
  --coral:#e2674f;
  --mustard:#d9a441;
  --blue:#5f82c4;
  --sage:#73946f;
  --lilac:#a98ec2;
  --paper-ink:#f7f4ed;
  --serif: Georgia,"Times New Roman","Songti SC","STSong","SimSun",serif;
  --sans: "PingFang SC","Hiragino Sans GB","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --r-lg:22px; --r-md:16px;
}

/* ---------- 基础 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
::selection{background:rgba(226,103,79,.18)}
img,svg,video{display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4,p,ul{margin:0}
ul{list-style:none;padding:0}
em{font-style:normal}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

.wrap{width:min(1120px,100% - 48px);margin-inline:auto}
.narrow{width:min(780px,100% - 48px)}

:focus-visible{outline:2px dashed var(--ink);outline-offset:3px;border-radius:4px}

/* 细线小按钮 / 链接 */
a{transition:color .2s ease}

/* ---------- 手绘点缀工具 ---------- */
.dot{position:absolute;border-radius:50%;pointer-events:none;animation:drift 7s ease-in-out infinite alternate}
@keyframes drift{from{transform:translateY(0)}to{transform:translateY(-9px)}}
.dot.d1{width:9px;height:9px;background:var(--coral);top:120px;left:6%}
.dot.d2{width:6px;height:6px;background:var(--blue);top:310px;left:2.4%}
.dot.d3{width:7px;height:7px;background:var(--mustard);bottom:90px;right:5%}
.dot.d4{width:5px;height:5px;background:var(--sage);top:210px;right:9%;animation-delay:1.2s}
.dot.d5{width:8px;height:8px;background:var(--lilac);bottom:180px;left:10%;animation-delay:.6s}
.hero-dots .star,.hero-dots .ast{position:absolute;pointer-events:none}
.hero-dots .star{color:var(--mustard);animation:spin 16s linear infinite}
.hero-dots .ast{color:rgba(35,33,30,.4);animation:drift 8s ease-in-out infinite alternate}
.star.s1{width:22px;height:22px;top:150px;right:8%}
.ast.a1{width:18px;height:18px;top:300px;left:45%;animation-delay:.8s}
@keyframes spin{to{transform:rotate(360deg)}}

/* ================= 顶栏 ================= */
.site-head{
  position:sticky;top:0;z-index:60;
  background:rgba(245,245,245,.82);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .3s ease,background .3s ease;
}
.site-head.scrolled{border-bottom-color:var(--line);background:rgba(246,246,245,.9)}
.nav-row{display:flex;align-items:center;justify-content:space-between;padding:13px 0}
.brand{display:inline-flex;align-items:center;gap:9px}
.brand-mark{width:27px;height:27px;flex:none}
.brand-name{font-size:19px;font-weight:700;letter-spacing:.1em}
.brand-name em{font-family:var(--serif);font-style:italic;font-size:11.5px;letter-spacing:.24em;color:var(--ink-faint);margin-left:7px;text-transform:uppercase}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a{font-size:14px;color:var(--ink-soft);position:relative;padding:6px 0}
.nav-links a:hover{color:var(--ink)}
.nav-links a::after{content:"";position:absolute;left:50%;bottom:0;width:0;height:1.5px;background:var(--coral);transition:width .22s ease,left .22s ease}
.nav-links a:hover::after{width:100%;left:0}

/* ================= Hero ================= */
.hero{position:relative;padding:74px 0 40px;overflow:visible}
.hero-dots{position:absolute;inset:0;pointer-events:none}
.hero-wash{display:none}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:56px;align-items:center}
.hero-art{display:flex;justify-content:center;min-width:0}
.hero-art svg{width:100%;max-width:660px;height:auto}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  background:var(--card);border:1.5px solid var(--line);
  border-radius:999px;padding:8px 16px;
  font-size:12.5px;letter-spacing:.14em;color:var(--ink-soft);
  margin-bottom:24px;
}
.eyebrow-dot{width:6px;height:6px;border-radius:50%;background:var(--coral)}
.eyebrow .eyebrow-dot:last-child{background:var(--blue)}

h1{font-size:clamp(42px,5vw,60px);font-weight:700;line-height:1.24;letter-spacing:.015em}
.hl-word{
  font-family:var(--serif);
  text-decoration:underline wavy var(--coral) 2.2px;
  text-underline-offset:.22em;
  padding:0 4px;
}
.sub{color:var(--ink-soft);font-size:16px;line-height:2;margin:22px 0 28px;max-width:560px}
.sub strong{color:var(--ink);font-weight:600}

/* ----- 解析面板 ----- */
.parse-panel{max-width:600px}
.parse-form{display:flex;gap:10px;align-items:stretch}
.input-wrap{
  flex:1;display:flex;align-items:center;gap:10px;
  background:var(--card);border:1.5px solid var(--line-strong);
  border-radius:18px;padding:0 6px 0 18px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.input-wrap:focus-within{border-color:var(--ink)}
.link-icon{width:18px;height:18px;color:var(--ink-faint);flex:none}
.mini-plats{display:flex;flex-wrap:wrap;gap:9px 22px;margin-top:28px}
.mini-plats li{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--ink-faint)}
.mini-plats svg{width:18px;height:18px;color:var(--ink-soft)}
#url-input{flex:1;min-width:0;border:0;outline:0;background:transparent;padding:15px 10px 15px 0;font:inherit;font-size:15px;color:var(--ink)}
#url-input::placeholder{color:#b6af9e}
.btn{
  border:0;cursor:pointer;border-radius:999px;
  display:inline-flex;align-items:center;gap:9px;
  font-size:15.5px;font-weight:600;letter-spacing:.05em;
  transition:transform .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn-ink{background:var(--ink);color:var(--paper-ink);padding:15px 24px}
.btn-ink:hover{transform:translateY(-2px) rotate(-.6deg)}
.btn-ink:active{transform:translateY(0)}
.btn-arrow{width:18px;height:18px}
.form-foot{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap;margin:11px 4px 0}
.hint{font-size:12.5px;color:var(--ink-faint)}
.examples{font-size:12.5px;color:var(--ink-faint);display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.ex-chip,.plat-chip,.q-chip{
  border:1.4px dashed var(--line-strong);background:transparent;cursor:pointer;
  color:var(--ink-soft);font-size:12.5px;border-radius:999px;padding:3px 11px;
  transition:all .2s ease;
}
.ex-chip:hover{background:var(--card);border-style:solid;border-color:var(--ink);color:var(--ink);transform:translateY(-1px)}
.stage{margin-top:18px}

/* ----- 解析中 ----- */
.r-parse{
  display:flex;gap:18px;align-items:center;
  background:var(--card);border:1.5px solid var(--line);border-radius:var(--r-lg);
  padding:20px 22px;
}
.spin-doodle{flex:none;width:58px;height:58px;color:var(--ink)}
.spin-doodle svg{width:100%;height:100%}
.spin-doodle .orbit{fill:none;stroke:currentColor;stroke-width:1.8;stroke-dasharray:2.6 9;stroke-linecap:round;transform-box:fill-box;transform-origin:center;animation:spin 1.6s linear infinite}
.spin-doodle .core{fill:var(--coral);transform-box:fill-box;transform-origin:center;animation:breathe 1.2s ease-in-out infinite alternate}
.pv-load .orbit{fill:none;stroke:currentColor;stroke-width:1.8;stroke-dasharray:2.6 9;stroke-linecap:round;transform-box:fill-box;transform-origin:center;animation:spin 1.5s linear infinite}
@keyframes breathe{from{transform:scale(.86)}to{transform:scale(1.05)}}
.r-parse-body{flex:1;min-width:0}
.r-title{font-size:15.5px;font-weight:600;display:flex;align-items:center;gap:2px}
.r-title .pmsg{font-weight:400;color:var(--ink-soft);margin-left:8px;font-size:14px}
.tdots{display:inline-flex;gap:3px;margin-left:2px}
.tdots i{width:4px;height:4px;border-radius:50%;background:var(--ink-soft);animation:bounce-dot 1.1s ease-in-out infinite}
.tdots i:nth-child(2){animation-delay:.15s}
.tdots i:nth-child(3){animation-delay:.3s}
@keyframes bounce-dot{0%,100%{transform:translateY(0);opacity:.4}50%{transform:translateY(-3px);opacity:1}}
.r-progress{margin-top:9px;height:4px;border-radius:99px;background:#ece7db;overflow:hidden;max-width:340px}
.r-progress b{display:block;height:100%;width:10%;background:var(--coral);border-radius:99px;animation:load 1.5s ease-in-out infinite}
@keyframes load{0%{width:6%;margin-left:0}55%{width:52%}100%{width:6%;margin-left:94%}}

/* ----- 结果卡片 ----- */
.r-result{
  background:var(--card);border:1.5px solid var(--line);border-radius:var(--r-lg);
  padding:24px;
  animation:rise .45s cubic-bezier(.22,.61,.36,1);
}
@keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.r-head{display:flex;align-items:center;gap:12px;margin-bottom:14px;flex-wrap:wrap}
.r-ava{
  width:42px;height:42px;border-radius:50%;border:1.6px solid var(--ink);background:var(--warm);
  display:grid;place-items:center;font-size:15px;font-weight:700;color:var(--ink);flex:none;
}
.r-author{font-size:15px;font-weight:600;line-height:1.35}
.r-meta{display:flex;align-items:center;gap:6px;font-size:12.5px;color:var(--ink-faint)}
.r-tags{margin-left:auto;display:flex;gap:8px;flex-wrap:wrap}
.tag{border:1.4px solid var(--line);background:var(--warm);border-radius:999px;padding:2px 11px;font-size:12px;color:var(--ink-soft)}
.tag.ok{border-color:rgba(115,148,111,.55);color:#5d7a59;background:rgba(115,148,111,.08)}
.tag.demo{border:1.4px dashed var(--line-strong);color:var(--ink-faint)}
.r-title-t{font-size:16.5px;font-weight:600;line-height:1.6;margin-bottom:12px}
.r-title-t .hash{color:var(--blue);font-weight:500}
.r-preview{
  position:relative;aspect-ratio:16/9;border:1.5px solid var(--line);
  border-radius:var(--r-md);overflow:hidden;background:var(--warm);
}
.r-preview video{width:100%;height:100%;object-fit:cover;background:#141210}
.r-preview.loading::after{
  content:"";position:absolute;inset:0;display:grid;place-items:center;
  background:repeating-linear-gradient(0deg,transparent 0 11px,transparent 11px 12px);
  animation:none;
}
.pv-load{
  position:absolute;inset:0;display:flex;flex-direction:column;gap:12px;align-items:center;justify-content:center;
  color:var(--ink-faint);font-size:13px;background:var(--warm);
  transition:opacity .3s ease;
}
.pv-load svg{width:46px;height:46px;color:var(--ink)}
/* 图文作品 */
.r-preview.img{display:block;aspect-ratio:auto;background:var(--warm);padding:16px;max-height:460px;overflow:auto}
.img-strip{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.img-strip img{width:100%;aspect-ratio:1/1;object-fit:cover;border:1.5px solid var(--line);border-radius:12px;background:#fff;transition:transform .25s ease}
.ri:hover img{transform:scale(1.02) rotate(-.5deg)}
.img-note{font-size:12px;color:var(--ink-faint);margin-top:12px;text-align:center}
.pv-load.hide{opacity:0;pointer-events:none}
.r-stats{display:flex;gap:18px;margin:14px 4px 0;font-size:12.5px;color:var(--ink-faint)}
.r-stats b{color:var(--ink-soft);font-weight:600}
.r-foot{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:18px}
.q-group{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.q-label{font-size:13px;color:var(--ink-soft)}
.q-chip{padding:6px 15px;font-size:13px;border-style:solid;border-color:var(--line);background:#fff}
.q-chip:hover{border-color:var(--ink)}
.q-chip.active{background:var(--ink);color:var(--paper-ink);border-color:var(--ink)}
.q-chip .q-tick{font-size:11px;margin-left:5px;opacity:.85}
.r-actions{margin-left:auto;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.btn-dl{background:var(--ink);color:var(--paper-ink);padding:12px 22px;border-radius:14px;font-size:14.5px}
.btn-dl:hover{transform:translateY(-2px) rotate(-.5deg)}
.btn-dl svg{width:17px;height:17px}
.btn-ghost{background:transparent;border:1.5px solid var(--line-strong);color:var(--ink-soft);padding:10px 18px;border-radius:14px;font-size:13.5px}
.btn-ghost:hover{background:#fff;color:var(--ink);border-color:var(--ink)}
.dl-note{width:100%;font-size:11.5px;color:var(--ink-faint);line-height:1.8}

/* ----- 失败卡片 ----- */
.r-fail{
  display:flex;gap:18px;align-items:flex-start;
  background:var(--card);border:1.5px solid var(--line);border-radius:var(--r-lg);padding:22px;
  animation:rise .4s cubic-bezier(.22,.61,.36,1);
}
.r-fail-ic{flex:none;width:52px;height:52px;color:var(--coral);animation:drift 3.4s ease-in-out infinite alternate}
.r-fail-ic circle.bg{fill:none;stroke:currentColor;stroke-width:1.7;stroke-dasharray:3 7;stroke-linecap:round}
.r-fail-body h3{font-size:16px;font-weight:600;margin-bottom:8px}
.r-fail-body ul{margin:4px 0 0;display:grid;gap:4px}
.r-fail-body li{font-size:13.5px;color:var(--ink-soft);display:flex;gap:9px;line-height:1.9}
.r-fail-body li::before{content:"";flex:none;width:5px;height:5px;border-radius:50%;background:var(--coral);margin-top:10px}
.r-fail .btn-ghost{margin-top:14px}

/* ---------- 滚动显现 ---------- */
.js .rv{opacity:0;transform:translateY(18px);transition:opacity .7s cubic-bezier(.22,.61,.36,1),transform .7s cubic-bezier(.22,.61,.36,1)}
.js .rv.in{opacity:1;transform:none}
.feat-grid .rv:nth-child(2){transition-delay:.05s}
.feat-grid .rv:nth-child(3){transition-delay:.1s}
.feat-grid .rv:nth-child(4){transition-delay:.15s}
.feat-grid .rv:nth-child(5){transition-delay:.2s}
.feat-grid .rv:nth-child(6){transition-delay:.25s}
.steps li:nth-child(2){transition-delay:.08s}
.steps li:nth-child(3){transition-delay:.16s}

/* ================= 章节 ================= */
.sec{padding:86px 0 30px}
.sec-head{text-align:center;margin-bottom:52px}
.kicker{
  display:flex;align-items:center;justify-content:center;gap:11px;
  font-size:11.5px;letter-spacing:.42em;text-transform:uppercase;color:var(--ink-faint);
  margin-bottom:18px;
}
.kicker span{width:6px;height:6px;border-radius:50%;background:var(--coral);letter-spacing:0}
.sec-head h2{font-size:clamp(28px,3.4vw,38px);font-weight:700;letter-spacing:.01em}
.squig{width:1.15em;height:.2em;vertical-align:-.05em;display:inline-block;margin:0 6px}
.sec-sub{color:var(--ink-soft);font-size:15px;margin-top:12px}

/* ----- 步骤 ----- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;counter-reset:step}
.steps li{position:relative;display:flex;align-items:stretch}
.step-card{
  flex:1;background:var(--card);border:1.5px solid var(--line);border-radius:var(--r-lg);
  padding:28px 26px 26px;position:relative;
  transition:border-color .25s ease,transform .25s ease;
}
.step-card:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.step-no{
  position:absolute;top:20px;right:22px;
  font-family:var(--serif);font-style:italic;font-size:15px;color:var(--ink-faint);letter-spacing:.08em;
}
.step-card h3{font-size:17px;font-weight:600;margin:18px 0 8px}
.step-card p{font-size:13.5px;color:var(--ink-soft);line-height:1.9}
.step-ic{width:44px;height:44px;color:var(--ink)}
.step-ic use{transition:none}
.step-link{position:absolute;top:50%;right:-30px;width:34px;height:34px;transform:translateY(-50%);z-index:2;color:var(--ink)}
.step-link path{stroke:var(--ink)}
.step-link path:last-child{stroke:var(--coral)}

/* ----- 特性 ----- */
.sec-feat{padding-bottom:60px}
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feat{
  position:relative;background:var(--card);border:1.5px solid var(--line);border-radius:var(--r-lg);
  padding:26px 24px 24px;overflow:hidden;
  transition:border-color .25s ease,transform .25s ease;
}
.feat:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.feat::before{
  content:"";position:absolute;top:18px;right:20px;width:8px;height:8px;border-radius:50%;
  background:var(--coral);opacity:.9;
}
.feat:nth-child(2)::before{background:var(--mustard)}
.feat:nth-child(3)::before{background:var(--blue)}
.feat:nth-child(4)::before{background:var(--sage)}
.feat:nth-child(5)::before{background:var(--lilac)}
.feat:nth-child(6)::before{background:var(--coral)}
.feat-ic{
  width:52px;height:52px;border-radius:16px;background:var(--warm);
  display:grid;place-items:center;border:1.4px dashed var(--line-strong);
  transition:transform .25s ease;
}
.feat:hover .feat-ic{transform:rotate(-4deg) scale(1.04)}
.feat-ic svg{width:30px;height:30px;color:var(--ink)}
.feat h3{font-size:15.5px;font-weight:600;margin:18px 0 8px}
.feat p{font-size:13.5px;color:var(--ink-soft);line-height:1.9}

/* ----- 平台 ----- */
.plat-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:14px}
.plat-chip{
  display:flex;align-items:center;gap:11px;padding:11px 20px;
  background:var(--card);border:1.5px solid var(--line);border-radius:999px;
  font-size:14.5px;color:var(--ink);transition:all .22s ease;
}
.plat-chip:hover{border-color:var(--ink);transform:translateY(-3px) rotate(-.5deg)}
.plat-chip:active{transform:none}
.plat-ic{width:26px;height:26px;color:var(--ink)}
.plat-ic svg{width:100%;height:100%}
.plat-chip b{font-weight:600}
.dot-s{width:7px;height:7px;border-radius:50%;background:var(--c,#23211e);opacity:.8}
.plat-note{text-align:center;font-size:12.5px;color:var(--ink-faint);margin-top:26px}

/* ----- FAQ ----- */
.sec-faq{padding-bottom:120px}
.faq-list{border-top:1.5px solid var(--line)}
.faq-item{border-bottom:1.5px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  background:transparent;border:0;cursor:pointer;padding:21px 4px;
  font-size:16px;font-weight:500;color:var(--ink);text-align:left;
}
.faq-q:hover .faq-x{color:var(--coral);transform:rotate(90deg)}
.faq-x{width:16px;height:16px;flex:none;color:var(--ink-faint);transition:transform .3s ease,color .3s ease;margin-right:4px}
.faq-item.open .faq-x{transform:rotate(135deg);color:var(--ink)}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .38s cubic-bezier(.4,0,.2,1)}
.faq-item.open .faq-a{grid-template-rows:1fr}
.faq-a-in{overflow:hidden}
.faq-a-in p{font-size:14.5px;color:var(--ink-soft);line-height:2;padding:0 34px 22px 4px}

/* ================= 页脚 ================= */
.site-foot{position:relative;overflow:hidden;border-top:1.5px solid var(--line);margin-top:40px}
.foot-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;
  padding:64px 0 8px;
}
.foot-brand p{font-size:13.5px;color:var(--ink-soft);line-height:2;margin:16px 0 18px}
.foot-dots{display:flex;gap:8px}
.foot-dots span{width:8px;height:8px;border-radius:50%;background:var(--c);opacity:.85}
.foot-col h4{font-size:12px;font-weight:600;letter-spacing:.24em;color:var(--ink-faint);margin-bottom:18px}
.foot-col a{display:block;font-size:13.5px;color:var(--ink-soft);padding:3px 0;width:fit-content}
.foot-col a:hover{color:var(--ink)}
.foot-bottom{border-top:1.5px solid var(--line);padding:20px 0 26px;margin-top:44px}
.foot-bottom p{font-size:12px;color:var(--ink-faint);line-height:1.9}
.foot-bottom .demo-note{margin-top:2px}
.foot-doodle{position:absolute;right:-26px;bottom:-8px;width:290px;height:145px;pointer-events:none;opacity:1}

/* ---------- 提示气泡 ---------- */
.toast{
  position:fixed;left:50%;bottom:30px;transform:translate(-50%,14px);
  background:var(--ink);color:var(--paper-ink);font-size:13.5px;border-radius:999px;
  padding:11px 20px;opacity:0;pointer-events:none;transition:all .3s ease;z-index:99;
  box-shadow:0 0 0 1.5px rgba(35,33,30,.12);
}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ================= 响应式 ================= */
@media (max-width:1020px){
  .hero-grid{grid-template-columns:1fr;gap:8px}
  .hero-art{order:2;max-width:560px;margin:30px auto 0}
  .hero-copy{order:1}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
  .foot-brand{grid-column:1 / -1}
}
@media (max-width:780px){
  .steps{grid-template-columns:1fr;gap:16px}
  .step-link{display:none}
  .parse-form{flex-direction:column}
  .btn-ink{justify-content:center;width:100%}
  .form-foot{flex-direction:column;align-items:flex-start;gap:6px}
  .r-foot{align-items:flex-start}
  .r-actions{margin-left:0;width:100%}
  .r-actions .btn-dl{flex:1;justify-content:center}
  .sec{padding:64px 0 20px}
  .sec-head{margin-bottom:38px}
}
@media (max-width:620px){
  .wrap{width:min(1120px,100% - 36px)}
  .nav-links{display:none}
  .hero{padding-top:48px}
  h1{font-size:38px}
  .feat-grid{grid-template-columns:1fr}
  .r-result{padding:18px}
  .r-fail{flex-direction:column}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .foot-doodle{opacity:.7}
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001s !important;animation-iteration-count:1 !important;transition-duration:.001s !important}
  html{scroll-behavior:auto}
  .js .rv{opacity:1;transform:none}
}