/* Literatura — zajednički stil (tamna tema) */
:root{
  color-scheme:dark;
  --bg:#000; --card:#141416; --card2:#1d1d20; --ink:#f5f5f7; --ink2:#a1a1a6; --ink3:#6e6e73; --line:rgba(255,255,255,.085); --line2:rgba(255,255,255,.16);
  --n:#ff6b62; --p:#5aa4ff; --ef:#4fd27c;
  --cb:rgba(79,210,124,.14); --vb:rgba(255,107,98,.14);
  --glass:rgba(10,10,12,.72);
  --r:22px;
  --ease:cubic-bezier(.2,.8,.2,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px;background:var(--bg)}
body{margin:0;min-height:100vh;display:flex;flex-direction:column;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","SF Pro Display","Helvetica Neue",Helvetica,Arial,sans-serif;font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased;letter-spacing:-.003em}
a{color:inherit}
::selection{background:rgba(255,255,255,.22)}
.katex{font-size:1.06em}
.katex-display{position:relative;margin:.9em 0;overflow-x:auto;overflow-y:hidden;padding:4px 0}

/* ---------- nav ---------- */
nav.top{position:fixed;top:0;left:0;right:0;z-index:50;height:74px;background:linear-gradient(180deg,rgba(0,0,0,.92) 0%,rgba(0,0,0,.78) 55%,rgba(0,0,0,0) 100%);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);-webkit-mask-image:linear-gradient(180deg,#000 62%,transparent);mask-image:linear-gradient(180deg,#000 62%,transparent)}
.navin{max-width:1180px;margin:0 auto;display:flex;align-items:center;gap:14px;padding:12px 20px 0;height:58px}
.navicon{flex:none;width:34px;height:34px;display:grid;place-items:center;color:var(--ink);text-decoration:none;opacity:.85;transition:transform .25s var(--ease),opacity .25s}
.navicon:hover{transform:scale(1.08);opacity:1}
.navicon svg{width:24px;height:24px}
.navhome{flex:none;font-size:13px;color:var(--ink2);text-decoration:none;padding:6px 4px;transition:color .2s}
.navhome:hover{color:var(--ink)}
.navtitle{flex:1;font-size:14px;font-weight:600;letter-spacing:-.01em;color:var(--ink2)}
.chips{position:relative;flex:1;height:34px;overflow:hidden;-webkit-mask-image:linear-gradient(90deg,transparent,#000 18%,#000 82%,transparent);mask-image:linear-gradient(90deg,transparent,#000 18%,#000 82%,transparent)}
.chips .track{position:absolute;left:0;top:0;height:100%;display:flex;align-items:center;gap:4px;white-space:nowrap;will-change:transform}
.chips a{flex:none;font-size:13px;color:var(--ink);text-decoration:none;padding:6px 12px;opacity:.15;font-weight:400;transition:font-weight .3s}
.chips a.on{font-weight:600}
#prog{position:fixed;left:0;top:0;width:100%;height:16px;pointer-events:none;z-index:60}

/* ---------- hero ---------- */
header.hero{width:100%;max-width:1080px;margin:0 auto;padding:130px 22px 30px;display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center}
header.hero.solo{grid-template-columns:1fr}
.kick{font-size:13px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--ink2)}
.kick a{text-decoration:none;transition:color .2s}.kick a:hover{color:var(--ink)}
h1{font-size:clamp(40px,6vw,64px);line-height:1.04;letter-spacing:-.035em;margin:.25em 0 .35em;font-weight:700}
.lead{font-size:21px;color:var(--ink2);line-height:1.45;margin:0}
.meta{margin-top:26px;display:flex;flex-wrap:wrap;gap:8px}
.pill{font-size:13px;padding:6px 14px;border-radius:999px;background:var(--card);color:var(--ink2);border:1px solid var(--line)}
.herofig{background:var(--card);border-radius:28px;padding:18px 18px 12px;border:1px solid var(--line)}
@media(max-width:820px){header.hero{grid-template-columns:1fr;padding-top:96px}}

/* ---------- sections ---------- */
main{width:100%;max-width:1080px;margin:0 auto;padding:0 22px 10px}
section{padding-top:72px}
.eyebrow{font-size:13px;font-weight:600;color:var(--ink3);letter-spacing:.06em;text-transform:uppercase}
h2{font-size:clamp(30px,4vw,44px);letter-spacing:-.03em;line-height:1.08;margin:.2em 0 .5em;font-weight:700}
h3{font-size:22px;letter-spacing:-.02em;margin:1.6em 0 .4em;font-weight:600}
h3:first-child{margin-top:0}
p{margin:.55em 0}
b,strong{font-weight:600}
.card{position:relative;background:var(--card);border-radius:var(--r);padding:32px 36px;border:1px solid var(--line);margin:18px 0}
@media(max-width:640px){.card{padding:24px 20px}}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.grid2>.card{margin:0}
@media(max-width:820px){.grid2{grid-template-columns:1fr}}
ul.clean{padding-left:1.1em;margin:.4em 0}
ul.clean li{margin:.3em 0}
ul.clean li::marker{color:var(--ink3)}
.n{color:var(--n)} .p{color:var(--p)} .g{color:var(--ef)} .muted{color:var(--ink2)}

/* formula boxes + tags */
.fx{position:relative;background:var(--card2);border-radius:16px;padding:14px 20px;margin:16px 0}
.fx.key{border:1px solid var(--line2)}
.fx.nbox{background:var(--vb)} .fx.pbox{background:rgba(90,164,255,.12)}
.tag{display:inline-block;font-size:11px;font-weight:600;padding:3px 9px;border-radius:999px;letter-spacing:.02em}
.fx .tag{position:absolute;top:10px;right:12px}
.tag.sheet{background:rgba(255,255,255,.1);color:var(--ink)}
.tag.know{border:1px solid var(--line2);color:var(--ink2)}
.note{display:flex;gap:14px;align-items:flex-start;background:var(--card2);border-radius:16px;padding:14px 18px;margin:16px 0;font-size:16px}
.note .ic{flex:none;width:22px;height:22px;border-radius:50%;border:1.5px solid var(--ink2);color:var(--ink);font-weight:700;display:grid;place-items:center;font-size:12px;margin-top:3px}

/* figures */
figure{margin:20px 0 6px;text-align:center}
figure svg{max-width:100%;height:auto}
figcaption{font-size:13px;color:var(--ink3);margin-top:8px}
svg text{font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Helvetica Neue",sans-serif;fill:var(--ink)}
.lbl{font-size:14px} .lbls{font-size:12px;fill:var(--ink2)} .tick{font-size:11px;fill:var(--ink3)} .axl{font-size:13px;fill:var(--ink2)}
.ax{stroke:var(--ink2);stroke-width:1.4;fill:none}
.grid{stroke:var(--line);stroke-width:1}
.cbf{fill:var(--cb)} .vbf{fill:var(--vb)}
.edge{stroke:var(--ink2);stroke-width:1.2}
.dash{stroke-dasharray:6 5}
.efl{stroke:var(--ef);stroke-width:1.8} .edl{stroke:var(--n);stroke-width:1.6} .eal{stroke:var(--p);stroke-width:1.6}
.dim{stroke:var(--ink2);stroke-width:1.2}
.curve{fill:none;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.c-si{stroke:var(--p)} .c-gaas{stroke:var(--n)} .c-ni{stroke:var(--ink)}
circle.pt{stroke:var(--card);stroke-width:2} circle.pt.c-si{fill:var(--p)} circle.pt.c-gaas{fill:var(--n)} circle.pt.c-ni{fill:var(--ink)}
.c-si-t{fill:var(--p);font-weight:600} .c-gaas-t{fill:var(--n);font-weight:600}
/* lattice */
.bond{stroke:rgba(255,107,98,.22);stroke-width:13;stroke-linecap:round}
.shell{fill:none;stroke:var(--ink3);stroke-width:1;stroke-dasharray:3 3}
.nuc{fill:#3a6fb8} .nuc-d{fill:#c9473f} .nuc-a{fill:#a8655f}
.nuc-t{fill:#fff;font-size:13px;font-weight:600}
.el{fill:var(--n)} .hole{fill:var(--card);stroke:var(--p);stroke-width:2}
.el-free{animation:orbit 3.4s ease-in-out infinite}
.hole-gen{animation:holepulse 3.6s ease-in-out infinite}
@keyframes orbit{0%,100%{transform:translate(0,0)}50%{transform:translate(6px,-5px)}}
@keyframes holepulse{0%,100%{opacity:.45}50%{opacity:1}}
/* unit cell */
.cell-edge{stroke:var(--ink3);stroke-width:1.2;stroke-dasharray:4 4}
.cell-bond{stroke:var(--ink2);stroke-width:4;stroke-linecap:round}
.atom{fill:#cfc8a4;stroke:#8f875e;stroke-width:1.2}
.atom-in{fill:#a9a27c;stroke:#6d6644;stroke-width:1.2}
/* hero anim */
.hdot{fill:var(--n)} .hhole{fill:none;stroke:var(--p);stroke-width:2}
.e1{animation:hj 5s ease-in-out infinite} .e2{animation:hj 5s ease-in-out 1.6s infinite} .e3{animation:hj 5s ease-in-out 3.2s infinite}
.h1{animation:hh 5s ease-in-out infinite} .h2{animation:hh 5s ease-in-out 1.6s infinite} .h3{animation:hh 5s ease-in-out 3.2s infinite}
@keyframes hj{0%,15%{transform:translateY(0)}40%,80%{transform:translateY(-118px)}100%{transform:translateY(0)}}
@keyframes hh{0%,22%{opacity:0}40%,78%{opacity:1}95%,100%{opacity:0}}

/* tables */
table{border-collapse:collapse;width:100%;font-size:15px;margin:14px 0}
th,td{padding:9px 12px;text-align:center;border-bottom:1px solid var(--line)}
th{font-weight:600;color:var(--ink3);font-size:13px}
td:first-child,th:first-child{text-align:left}
.tw{overflow-x:auto}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:18px 0}
.stat{background:var(--card2);border-radius:16px;padding:16px}
.stat .v{font-size:24px;font-weight:700;letter-spacing:-.02em}
.stat .k{font-size:13px;color:var(--ink2);line-height:1.35;margin-top:4px}
@media(max-width:820px){.stats{grid-template-columns:1fr 1fr}}
.tcard{border-radius:var(--r);padding:26px 28px;border:1px solid var(--line);background:var(--card)}
.tcard.nt{border-color:rgba(255,107,98,.32)} .tcard.pt{border-color:rgba(90,164,255,.32)}
.tcard h4{margin:0 0 8px;font-size:20px;letter-spacing:-.02em}

/* tasks */
.task{position:relative;background:var(--card);border-radius:var(--r);border:1px solid var(--line);margin:22px 0;overflow:hidden}
.task .th{display:flex;align-items:center;gap:14px;padding:22px 30px 6px}
.task .num{flex:none;width:40px;height:40px;border-radius:12px;background:var(--card2);border:1px solid var(--line2);color:var(--ink);display:grid;place-items:center;font-weight:600;font-size:16px}
.task .tt{font-size:13px;color:var(--ink3);font-weight:500}
.task .tn{font-size:19px;font-weight:600;letter-spacing:-.015em}
.task .tb{padding:4px 30px 22px}
.sol{display:grid;grid-template-rows:0fr;transition:grid-template-rows .55s var(--ease)}
.sol>div{overflow:hidden;position:relative}
.sol.open{grid-template-rows:1fr}
.solin{border-top:1px solid var(--line);padding:20px 30px 26px;background:linear-gradient(180deg,var(--card2),transparent 160px)}
button.tog{appearance:none;border:0;cursor:pointer;font:inherit;font-size:15px;font-weight:500;color:#000;background:var(--ink);padding:9px 18px;border-radius:999px;margin-top:10px;transition:transform .15s,background .2s,color .2s}
button.tog:hover{transform:scale(1.03)} button.tog:active{transform:scale(.97)}
button.tog.open{background:var(--card2);color:var(--ink)}
.step{display:flex;gap:12px;margin:14px 0}
.step .sn{flex:none;width:24px;height:24px;border-radius:50%;border:1.5px solid var(--ink3);color:var(--ink2);font-size:12px;font-weight:600;display:grid;place-items:center;margin-top:3px}
.step .sc{flex:1;min-width:0}
.sub{font-weight:600;margin:20px 0 4px;font-size:16px}

/* widget */
.widget{background:var(--card2);border-radius:18px;padding:18px 20px;margin:18px 0}
.wrow{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
input[type=range]{flex:1;min-width:180px;accent-color:#f5f5f7}
.ro{font-variant-numeric:tabular-nums;font-size:15px;color:var(--ink2)}
.ro b{color:var(--ink)}

/* pager */
.pager{width:100%;max-width:1080px;margin:40px auto 0;padding:0 22px;display:grid;grid-template-columns:1fr 1fr;gap:18px}
.pager>a,.pager>div{display:block;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px 22px;text-decoration:none;transition:transform .3s var(--ease),border-color .3s}
.pager>a:hover{transform:translateY(-3px);border-color:var(--line2)}
.pager .lab{font-size:12px;color:var(--ink3);text-transform:uppercase;letter-spacing:.06em}
.pager .t{font-size:17px;font-weight:600;margin-top:2px}
.pager .next{text-align:right}
.pager .off{opacity:.4}

/* library: home + subject */
.subjects{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:18px;margin-top:10px}
.scard{display:flex;flex-direction:column;gap:14px;background:var(--card);border:1px solid var(--line);border-radius:24px;padding:26px;text-decoration:none;transition:transform .35s var(--ease),border-color .35s}
.scard:hover{transform:translateY(-4px);border-color:var(--line2)}
.scard .si{width:52px;height:52px;border-radius:15px;background:var(--card2);border:1px solid var(--line2);display:grid;place-items:center}
.scard .si svg{width:30px;height:30px}
.scard .st{font-size:22px;font-weight:600;letter-spacing:-.02em;line-height:1.2}
.scard .sm{font-size:14px;color:var(--ink2)}
.bar{height:4px;border-radius:4px;background:var(--card2);overflow:hidden}
.bar i{display:block;height:100%;background:var(--ink);border-radius:4px}
.grouph{font-size:13px;font-weight:600;color:var(--ink3);letter-spacing:.06em;text-transform:uppercase;margin:44px 0 6px}
.weeks{display:flex;flex-direction:column;gap:10px;margin-top:10px}
.week{display:flex;align-items:center;gap:18px;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:16px 22px;text-decoration:none;transition:transform .3s var(--ease),border-color .3s}
a.week:hover{transform:translateX(4px);border-color:var(--line2)}
.week .wn{flex:none;width:44px;height:44px;border-radius:12px;background:var(--card2);display:grid;place-items:center;font-weight:600;font-variant-numeric:tabular-nums}
.week .wt{font-size:17px;font-weight:600;letter-spacing:-.01em}
.week .ws{font-size:14px;color:var(--ink2)}
.week .wx{margin-left:auto;font-size:12px;color:var(--ink3);white-space:nowrap}
.week.soon{opacity:.42}
.week.extra{border-style:dashed;border-color:var(--line2)}
a.week.extra:hover{border-color:var(--ink3)}
.week.extra .wn{color:var(--ink)}
.week .arrow{margin-left:auto;color:var(--ink2);font-size:20px}
.bigicon{width:72px;height:72px;border-radius:20px;background:var(--card2);border:1px solid var(--line2);display:grid;place-items:center;margin-bottom:18px}
.bigicon svg{width:42px;height:42px}

/* reveal */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}*{animation:none!important}}
footer{margin-top:auto;text-align:center;padding:48px 20px 40px;color:var(--ink);opacity:.26;font-size:13px;letter-spacing:.04em}

body[data-view=home] footer{padding-top:140px;padding-bottom:28px}
body[data-view=home] main{padding-bottom:60px}
.scard{flex-direction:row;align-items:center;gap:18px;padding:22px 24px}
.scard .st{font-size:20px}
.hero-sub{margin-top:14px;font-size:14px;color:var(--ink3);letter-spacing:.01em}
/* paleta: linija u punoj boji, sjenčanje svjetlije iste boje */
:root{--blue:#5aa4ff;--red:#ff6b62;--green:#4fd27c;--yellow:#ffd60a;--orange:#ff9f45;--purple:#bf8cff}
.cbf{fill:rgba(79,210,124,.14);stroke:var(--green);stroke-width:1.4}
.vbf{fill:rgba(255,107,98,.14);stroke:var(--red);stroke-width:1.4}
.ibf{fill:rgba(191,140,255,.14);stroke:var(--purple);stroke-width:1.4}
.c-ni{stroke:var(--orange)} circle.pt.c-ni{fill:var(--orange)}
.area{stroke:none}
.atom{fill:rgba(255,214,10,.22);stroke:var(--yellow);stroke-width:1.4}
.atom-in{fill:rgba(255,159,69,.28);stroke:var(--orange);stroke-width:1.4}
.cell-bond{stroke:rgba(255,159,69,.75);stroke-width:3.5}
.nuc{fill:rgba(90,164,255,.2);stroke:var(--blue);stroke-width:1.4} .nuc-d{fill:rgba(255,107,98,.22);stroke:var(--red)} .nuc-a{fill:rgba(191,140,255,.22);stroke:var(--purple)}
.nuc-t{fill:var(--ink)}

/* prioritet boja: plava i crvena, zatim ljubičasta i zelena, narančasta zadnja */
.cbf{fill:rgba(90,164,255,.15);stroke:var(--blue)}
.vbf{fill:rgba(255,107,98,.14);stroke:var(--red)}
.c-ni{stroke:var(--blue)} circle.pt.c-ni{fill:var(--blue)}
.atom{fill:rgba(90,164,255,.2);stroke:var(--blue)}
.atom-in{fill:rgba(191,140,255,.26);stroke:var(--purple)}
.cell-bond{stroke:rgba(191,140,255,.7)}
.efl{stroke:var(--purple)}
.g{color:var(--purple)}
/* naslov tjedna u jednoj liniji, manje praznog prostora */
body[data-view=page] header.hero{padding:104px 22px 0}
body[data-view=page] h1{font-size:clamp(28px,4vw,46px);margin:.2em 0 .25em}
body[data-view=page] main>section:first-child{padding-top:52px}

/* jedinična ćelija: žuta / narančasta (vizualno najbolje) */
.atom{fill:rgba(255,214,10,.2);stroke:#ffd60a}
.atom-in{fill:rgba(255,159,69,.26);stroke:#ff9f45}
.cell-bond{stroke:rgba(255,159,69,.75)}
/* legenda grafova: bez okvira, linija s kružićem, opis na prijelaz mišem */
.legend{display:flex;flex-wrap:wrap;justify-content:center;gap:6px 22px;margin:0 0 6px;font-size:13px;color:var(--ink2)}
.lg{position:relative;display:inline-flex;align-items:center;gap:8px;cursor:default;padding:4px 2px;outline:none;transition:color .2s}
.lg:hover,.lg:focus{color:var(--ink)}
.lg i{position:relative;width:24px;height:2.5px;border-radius:2px;background:var(--c)}
.lg.dash i{background:repeating-linear-gradient(90deg,var(--c) 0 5px,transparent 5px 8px)}
.lg i::after{content:"";position:absolute;left:50%;top:50%;width:7px;height:7px;border-radius:50%;background:var(--c);transform:translate(-50%,-50%)}
.lg .tip{position:absolute;left:50%;bottom:calc(100% + 8px);transform:translate(-50%,4px);width:max-content;max-width:320px;padding:9px 12px;border-radius:12px;background:#232326;border:1px solid var(--line2);color:var(--ink);font-size:13px;line-height:1.45;text-align:left;opacity:0;pointer-events:none;transition:opacity .2s,transform .25s var(--ease);z-index:5;box-shadow:0 10px 30px rgba(0,0,0,.45)}
.lg:hover .tip,.lg:focus .tip{opacity:1;transform:translate(-50%,0)}
.atom{fill:#5a4e12} .atom-in{fill:#5a3e24}

/* zaglavlje više, slabiji gradijent; čestice uz sam vrh */
nav.top{height:52px;background:linear-gradient(180deg,rgba(0,0,0,.72) 0%,rgba(0,0,0,.45) 60%,rgba(0,0,0,0) 100%);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.navin{padding:4px 20px 0;height:44px}
#prog{height:8px}
body[data-view=page] header.hero{padding-top:88px}
html{scroll-padding-top:64px}

footer .disc{margin-top:6px;font-size:11px;letter-spacing:.02em;opacity:.8}
body[data-view=subject] h1{margin-bottom:0}
body[data-view=subject] #weeks>.grouph:first-child{margin-top:26px}

/* ---------- pojašnjenja ---------- */
.card.hasx{padding-bottom:64px}
.xbtn{position:absolute;right:22px;bottom:18px;display:inline-flex;align-items:center;gap:7px;appearance:none;cursor:pointer;font:inherit;font-size:13px;font-weight:500;color:var(--ink2);background:transparent;border:1px dashed var(--line2);border-radius:999px;padding:6px 13px 6px 10px;transition:color .2s,border-color .2s,background .2s}
.xbtn:hover{color:var(--ink);border-color:var(--ink3);background:var(--card2)}
.xbtn svg{width:15px;height:15px;flex:none}
.xov{position:fixed;inset:0;z-index:90;background:rgba(0,0,0,.42);backdrop-filter:blur(9px);-webkit-backdrop-filter:blur(9px);opacity:0;pointer-events:none;transition:opacity 1s cubic-bezier(.4,0,.2,1)}
.xov.on{opacity:1;pointer-events:auto}
.xcv{position:fixed;inset:0;width:100vw;height:100vh;z-index:91;pointer-events:none;opacity:0}
.xwin{position:fixed;left:50%;top:50%;z-index:92;width:min(820px,calc(100vw - 28px));max-height:min(86vh,980px);overflow:auto;transform:translate(-50%,-50%) scale(.975);filter:blur(6px);background:var(--card);border:1px solid var(--line2);border-radius:24px;box-shadow:0 30px 90px rgba(0,0,0,.6);opacity:0;visibility:hidden;pointer-events:none;transition:opacity .45s ease,transform .5s ease,filter .45s ease,visibility 0s .5s;overscroll-behavior:contain}
.xwin.out{transition:opacity .75s cubic-bezier(.4,0,.6,1),transform .8s cubic-bezier(.4,0,.6,1),filter .75s ease-in,visibility 0s .8s;transform:translate(-50%,-50%) scale(1.035);filter:blur(10px)}
.xwin.on{opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%,-50%) scale(1);filter:blur(0);transition:opacity .8s cubic-bezier(.22,.61,.36,1),transform .9s cubic-bezier(.22,.61,.36,1),filter .8s cubic-bezier(.22,.61,.36,1),visibility 0s}
.xin{padding:30px 36px 32px}
.xin .xk{font-size:12px;font-weight:600;color:var(--ink3);letter-spacing:.06em;text-transform:uppercase}
.xin h3{margin:.2em 0 .6em;font-size:24px;letter-spacing:-.02em}
.xin figure{margin:18px 0}
.xclose{position:sticky;float:right;top:14px;margin:14px 14px 0 0;width:34px;height:34px;border-radius:50%;border:1px solid var(--line2);background:var(--card2);color:var(--ink);font-size:20px;line-height:1;cursor:pointer;z-index:2}
.xclose:hover{background:#2a2a2e}
body.xlock{overflow:hidden}
@media(max-width:640px){.xin{padding:22px 20px 26px}.card.hasx{padding-bottom:60px}}