/* Elychron 官网 —— 结构与主题都来自 App 自己的东西：一周课表、等宽时间 */
:root{
  --pink:#FF5E93; --pink-dark:#CF2E67; --pink-soft:#FFE4EC; --pink-glow:rgba(255,94,147,.16);
  --ink:#211419; --ink-2:#6A555E; --paper:#FFFBFD; --paper-2:#FFF4F8;
  --line:#F1DFE7; --line-2:#E4CCD8;
  --slot-a:#FF8FB4; --slot-b:#FFC2D3; --slot-c:#E3A0C4; --slot-d:#F5B7C5; --slot-e:#C986AC;
  --slot-empty:#F7E9EF; --nav-bg:rgba(255,251,253,.82);
  --maxw:1064px;
}
@media (prefers-color-scheme: dark){
  :root{
    --ink:#F7EFF2; --ink-2:#B29FA8; --paper:#130C10; --paper-2:#1C1217;
    --line:#2C1E25; --line-2:#3A2731; --pink-soft:#3A2029; --pink-glow:rgba(255,94,147,.14);
    --slot-a:#B04E72; --slot-b:#8C3D5A; --slot-c:#96507A; --slot-d:#7A3A52; --slot-e:#6B2F46;
    --slot-empty:#241820; --nav-bg:rgba(19,12,16,.82);
  }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--paper); color:var(--ink);
  font:16.5px/1.75 -apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
}
a{color:var(--pink-dark); text-decoration:none}
a:hover{text-decoration:underline}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace; font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--pink); outline-offset:3px; border-radius:4px}

.nav{position:sticky; top:0; z-index:9; display:flex; align-items:center; justify-content:space-between;
  padding:14px 26px; background:var(--nav-bg); backdrop-filter:saturate(170%) blur(14px);
  border-bottom:1px solid var(--line)}
.logo{display:flex; align-items:center; gap:10px; font-weight:700; font-size:16.5px; letter-spacing:-.15px; color:var(--ink)}
.logo i{width:10px; height:10px; border-radius:3px; background:var(--pink); transform:rotate(45deg); box-shadow:0 0 0 3px var(--pink-soft)}
.nav nav a{margin-left:22px; color:var(--ink-2); font-size:14.5px}

main{max-width:var(--maxw); margin:0 auto; padding:0 26px}

/* ===== hero ===== */
.hero{position:relative; display:grid; grid-template-columns:1.06fr .94fr; gap:56px; align-items:center;
  padding:78px 0 62px}
.hero::before{content:""; position:absolute; inset:-90px -40vw 30% -40vw; z-index:-2; pointer-events:none;
  background:radial-gradient(60% 60% at 68% 34%,var(--pink-glow),transparent 68%)}
.hero::after{content:""; position:absolute; inset:0 -40vw; z-index:-1; pointer-events:none; opacity:.5;
  background-image:linear-gradient(to right,var(--line) 1px,transparent 1px),
                   linear-gradient(to bottom,var(--line) 1px,transparent 1px);
  background-size:34px 34px;
  -webkit-mask-image:radial-gradient(70% 70% at 40% 40%,#000,transparent 72%);
  mask-image:radial-gradient(70% 70% at 40% 40%,#000,transparent 72%)}
.eyebrow{margin:0 0 16px; font-family:ui-monospace,Menlo,monospace; font-size:11.5px; letter-spacing:.22em;
  text-transform:uppercase; color:var(--pink-dark); font-weight:600}
.hero h1{font-size:clamp(2.5rem,5.4vw,3.6rem); line-height:1.06; letter-spacing:-.035em; margin:0 0 20px; font-weight:800}
.hero h1 em{font-style:normal; position:relative; white-space:nowrap}
.hero h1 em::after{content:""; position:absolute; left:-.04em; right:-.04em; bottom:.04em; height:.32em;
  background:var(--pink-soft); z-index:-1; border-radius:3px}
.lede{font-size:17px; color:var(--ink-2); margin:0 0 28px; max-width:30em}
.cta{display:flex; gap:11px; flex-wrap:wrap}
.btn{display:inline-block; padding:11.5px 22px; border-radius:999px; border:1px solid var(--line-2);
  color:var(--ink); font-size:14.5px; font-weight:600; background:transparent;
  transition:border-color .18s ease, background .18s ease, transform .18s ease}
.btn:hover{text-decoration:none; border-color:var(--pink); transform:translateY(-1px)}
.btn.primary{background:var(--pink); border-color:var(--pink); color:#fff; box-shadow:0 6px 18px -8px var(--pink-dark)}
.btn.primary:hover{background:var(--pink-dark); border-color:var(--pink-dark)}
.btn.ghost{border-style:dashed; color:var(--ink-2); cursor:default}
.btn.ghost:hover{transform:none; border-color:var(--line-2)}
.meta{margin-top:22px; font-size:12.5px; color:var(--ink-2); letter-spacing:.01em; opacity:.9}


/* ===== 首页动效：各站档案卡聚拢成 Elychron ===== */
.stack{position:relative; margin:0; perspective:1500px}
.deck{position:relative; aspect-ratio:1/1.06}
.card{position:absolute; left:50%; top:50%; width:214px; aspect-ratio:3/4.15; border-radius:15px;
  padding:16px 16px 14px; display:flex; flex-direction:column; justify-content:space-between;
  color:#fff; overflow:hidden; transform-origin:50% 60%; transform:translate(-50%,-50%); z-index:1;
  box-shadow:0 26px 48px -30px rgba(88,16,48,.5), inset 0 1px 0 rgba(255,255,255,.55);
  animation:gather 1.15s cubic-bezier(.22,.61,.36,1) both}
.card::after{content:""; position:absolute; inset:0; pointer-events:none;
  background:linear-gradient(118deg,rgba(255,255,255,.55) 0 16%,rgba(255,255,255,.06) 34%,rgba(255,255,255,0) 52%)}
.card .no{font-size:9.5px; letter-spacing:.16em; opacity:.8}
.card .kick{font-size:9px; letter-spacing:.12em; opacity:.62; margin-top:3px}
.card b{align-self:flex-start; font-size:34px; line-height:1.1; letter-spacing:-.03em; font-weight:800;
  text-shadow:0 2px 14px rgba(0,0,0,.18)}
.card .access{font-size:9.5px; letter-spacing:.16em; opacity:.85}
.s1{background:linear-gradient(165deg,#7C3552,#5A2038); --x:-236px; --y:-52px; --r:-16deg; --z:6px; --s:.88}
.s2{background:linear-gradient(165deg,#C986AC,#A2567F); --x:-118px; --y:-14px; --r:-7deg; --z:12px; --s:.91}
.s3{background:linear-gradient(165deg,#E3A0C4,#C2739C); --x:6px;   --y:14px;  --r:3deg;  --z:18px; --s:.94}
.s4{background:linear-gradient(165deg,#F5B7C5,#DE8CA4); --x:126px;  --y:-16px; --r:10deg; --z:24px; --s:.96}
.s5{background:linear-gradient(165deg,#FF8FB4,#E5608F); --x:242px;  --y:-56px; --r:17deg; --z:30px; --s:.98}
.s1{animation-delay:.06s} .s2{animation-delay:.12s} .s3{animation-delay:.18s}
.s4{animation-delay:.24s} .s5{animation-delay:.3s}
@keyframes gather{
  0%{opacity:0; transform:translate(calc(-50% + var(--x)),calc(-50% + var(--y))) rotate(var(--r)) scale(.94)}
  35%{opacity:1}
  100%{opacity:1; transform:translate(-50%,-50%) rotate(var(--r) * .12) scale(.86) translateZ(var(--z))}
}
.brand{width:236px; aspect-ratio:3/3.6; align-items:center; justify-content:center; gap:14px; z-index:5;
  background:linear-gradient(170deg,#FFFFFF,#FFF0F5 62%,#FFE2EC);
  border:1px solid rgba(255,94,147,.22); color:var(--ink);
  box-shadow:0 34px 60px -30px rgba(88,16,48,.45), inset 0 1px 0 #fff, 0 0 0 6px rgba(255,255,255,.5);
  animation:brandIn .8s cubic-bezier(.2,.7,.3,1) 1.06s both}
.brand img{width:96px; height:96px; border-radius:20px; box-shadow:0 14px 26px -14px rgba(88,16,48,.55)}
.brand .word{font-size:13px; letter-spacing:.42em; font-weight:700; color:var(--pink-dark); padding-left:.42em}
.brand::after{background:linear-gradient(122deg,rgba(255,255,255,.9) 0 22%,rgba(255,255,255,0) 46%)}
@keyframes brandIn{from{opacity:0; transform:translate(-50%,-40%) scale(.9)} to{opacity:1; transform:translate(-50%,-50%) scale(1)}}
.sheen{position:absolute; left:50%; top:50%; width:236px; height:320px; border-radius:16px; overflow:hidden;
  transform:translate(-50%,-50%); pointer-events:none; z-index:6}
.sheen::before{content:""; position:absolute; inset:-20% -140%; background:linear-gradient(100deg,transparent 38%,rgba(255,255,255,.85) 50%,transparent 62%);
  transform:translateX(-70%); animation:sheen 1.35s ease-out 1.5s both}
@keyframes sheen{to{transform:translateX(70%)}}
.floor{position:absolute; left:50%; bottom:-14px; width:76%; height:44px; transform:translateX(-50%);
  background:radial-gradient(60% 60% at 50% 50%,rgba(120,20,60,.22),transparent 72%); filter:blur(6px)}
.icon-mirror{position:absolute; left:50%; bottom:-6px; width:96px; transform:translateX(-50%) scaleY(-1);
  opacity:.14; filter:blur(1.2px); border-radius:20px;
  -webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.85),transparent 78%);
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.85),transparent 78%)}
.points{list-style:none; margin:26px 0 0; padding:0; display:grid; gap:7px; max-width:27em}
.points li{display:flex; gap:10px; align-items:baseline; font-size:14px; color:var(--ink-2)}
.points .mono{flex:0 0 auto; min-width:52px; font-size:10.5px; letter-spacing:.14em; color:var(--pink-dark); font-weight:700}
@media (prefers-reduced-motion:reduce){
  .card,.brand,.sheen::before{animation:none}
  .s1,.s2,.s3,.s4,.s5{transform:translate(-50%,-50%) rotate(0) scale(.86); opacity:1}
  .brand{transform:translate(-50%,-50%); opacity:1}
}
@media (max-width:860px){
  .deck{aspect-ratio:1/1}
  .card{width:150px}
  .brand{width:168px}
  .card b{font-size:24px}
  .s1{--x:-132px; --y:-40px} .s2{--x:-66px} .s3{--x:4px; --y:10px}
  .s4{--x:70px; --y:-12px} .s5{--x:136px; --y:-44px}
  .sheen{width:168px; height:230px}
}

/* ===== 通用分节：左侧标签栏 + 右侧内容（呼应课表的时间轴） ===== */
.section{display:grid; grid-template-columns:118px 1fr; gap:40px; padding:62px 0; border-top:1px solid var(--line)}
.rail{padding-top:6px}
.label{margin:0; font-size:11.5px; letter-spacing:.2em; text-transform:uppercase; color:var(--pink-dark); font-weight:600}
.section h2{font-size:clamp(1.5rem,2.5vw,1.9rem); letter-spacing:-.028em; line-height:1.25; margin:0 0 12px; font-weight:750}
.sub{margin:0 0 28px; color:var(--ink-2); font-size:15px; max-width:44em}

.grid{display:grid; gap:14px; grid-template-columns:repeat(auto-fit,minmax(258px,1fr))}
.card{position:relative; border:1px solid var(--line); border-radius:16px; padding:18px 18px 17px;
  background:linear-gradient(180deg,var(--paper-2),var(--paper) 62%);
  transition:transform .2s ease, border-color .2s ease, box-shadow .2s ease}
.card:hover{transform:translateY(-2px); border-color:var(--line-2); box-shadow:0 18px 40px -34px rgba(120,20,60,.55)}
.chip{margin:0 0 11px; display:inline-block; padding:2.5px 9px; border-radius:999px; font-size:11px;
  letter-spacing:.06em; color:var(--ink-2); background:var(--slot-empty); border:1px solid var(--line)}
.chip.a{background:var(--slot-a); border-color:transparent; color:#3a1220}
.chip.b{background:var(--slot-b); border-color:transparent; color:#3a1220}
.chip.c{background:var(--slot-c); border-color:transparent; color:#33102a}
.chip.d{background:var(--slot-d); border-color:transparent; color:#3a1220}
.chip.e{background:var(--slot-e); border-color:transparent; color:#2e0d20}
.card h3{margin:0 0 8px; font-size:15.5px; letter-spacing:-.012em}
.card p{margin:0; font-size:13.8px; color:var(--ink-2); line-height:1.68}

.platform{border:1px solid var(--line); border-radius:16px; padding:19px 20px 8px; margin-bottom:14px;
  background:linear-gradient(180deg,var(--paper-2),var(--paper) 62%)}
.p-head{display:flex; align-items:baseline; justify-content:space-between; gap:14px; flex-wrap:wrap; margin-bottom:6px}
.p-head h3{margin:0; font-size:17px; letter-spacing:-.022em}
.mirrors{list-style:none; margin:6px 0 0; padding:0}
.mirrors li{display:grid; grid-template-columns:minmax(112px,140px) 1fr auto; gap:12px; align-items:center;
  padding:12px 0; border-top:1px solid var(--line)}
.mirrors .src{font-size:14.6px; font-weight:600}
.mirrors .why{font-size:13px; color:var(--ink-2)}
.mirrors .tail{display:flex; align-items:center; gap:10px; justify-self:end}
.link{font-size:14px; font-weight:600; padding:5px 14px; border-radius:999px; border:1px solid var(--line-2);
  transition:border-color .18s ease, background .18s ease}
.link:hover{text-decoration:none; border-color:var(--pink); background:var(--pink-soft)}
.link.todo{color:var(--ink-2); border-style:dashed; pointer-events:none}
.code{font-family:ui-monospace,Menlo,monospace; font-size:11.5px; color:var(--ink-2);
  border:1px solid var(--line); border-radius:6px; padding:2px 7px; white-space:nowrap}
@media (max-width:640px){
  .mirrors li{grid-template-columns:1fr auto; row-gap:6px}
  .mirrors .why{grid-column:1 / -1; order:3}
}
.dl{border:1px solid var(--line); border-radius:16px; padding:20px; background:var(--paper)}
.dl.primary{border-color:var(--line-2); background:linear-gradient(180deg,var(--paper-2),var(--paper) 70%)}
.dl h3{margin:6px 0 9px; font-size:16.5px; letter-spacing:-.02em}
.dl p{margin:0 0 16px; font-size:13.8px; color:var(--ink-2); min-height:42px}
.meta-line{margin:0; font-size:11px; letter-spacing:.12em; color:var(--ink-2); text-transform:uppercase}

.seal{display:flex; gap:16px; align-items:flex-start; padding:17px 19px; margin-bottom:18px;
  background:var(--paper-2); border:1px solid var(--line); border-left:3px solid var(--pink); border-radius:14px}
.seal-tag{margin:0; font-size:10.5px; letter-spacing:.16em; color:var(--pink-dark); font-weight:600;
  white-space:nowrap; padding-top:3px}
.seal p{margin:0}
.bullets{margin:0; padding-left:20px; color:var(--ink-2); font-size:14.6px}
.bullets li{margin:8px 0}

.faq{margin:0}
.faq > div{border-top:1px solid var(--line); padding:15px 0 13px}
.faq > div:first-child{border-top:0; padding-top:0}
.faq dt{font-weight:650; font-size:15.5px}
.faq dd{margin:6px 0 0; color:var(--ink-2); font-size:14.6px}

.footer{border-top:1px solid var(--line); margin-top:10px; padding:34px 26px 52px; text-align:center; color:var(--ink-2); font-size:13.5px}
.brandline{margin:0; font-size:10.5px; letter-spacing:.2em; color:var(--ink-2)}
.links{margin:14px 0 0}
.links a{margin:0 10px}
.fine{font-size:11.5px; margin-top:16px; opacity:.8; line-height:1.7}

@media (max-width:860px){
  main{padding:0 20px}
  .hero{grid-template-columns:1fr; gap:36px; padding:48px 0 44px}
  .hero::after{inset:0 -20px}
  .section{grid-template-columns:1fr; gap:18px; padding:44px 0}
  .rail{padding-top:0}
  .lede br{display:none}
  .nav nav a{margin-left:14px; font-size:13.5px}
}

/* ===== 首页动效：各站档案卡聚拢成 Elychron（类名 .acard，避开功能卡的 .card）===== */
.stack{position:relative; margin:0; perspective:1500px}
.deck{position:relative; aspect-ratio:1/1; transform-style:preserve-3d; transform:rotateX(6deg)}
.acard{position:absolute; left:50%; top:50%; width:212px; aspect-ratio:3/4.15; border-radius:15px;
  padding:16px 16px 14px; display:flex; flex-direction:column; justify-content:space-between;
  color:#fff; overflow:hidden; transform-origin:50% 60%; transform:translate(-50%,-50%);
  box-shadow:0 26px 48px -30px rgba(88,16,48,.5), inset 0 1px 0 rgba(255,255,255,.5);
  animation:gather 1.15s cubic-bezier(.22,.61,.36,1) both}
.acard::after{content:""; position:absolute; inset:0; pointer-events:none;
  background:linear-gradient(118deg,rgba(255,255,255,.5) 0 15%,rgba(255,255,255,.06) 33%,rgba(255,255,255,0) 52%)}
.acard .no{font-size:9.5px; letter-spacing:.16em; opacity:.82}
.acard .kick{font-size:9px; letter-spacing:.12em; opacity:.6; margin-top:3px}
.acard b{align-self:flex-start; font-size:33px; line-height:1.08; letter-spacing:-.03em; font-weight:800;
  text-shadow:0 2px 14px rgba(0,0,0,.18)}
.acard .access{font-size:9.5px; letter-spacing:.16em; opacity:.85}
.s1{background:linear-gradient(165deg,#7C3552,#572035); --x:-232px; --y:-50px; --r:-16deg; --stack:-2; --sc:.9}
.s2{background:linear-gradient(165deg,#C986AC,#9F557D); --x:-116px; --y:-12px; --r:-7deg;  --stack:-1; --sc:.925}
.s3{background:linear-gradient(165deg,#E3A0C4,#C0739B); --x:6px;    --y:14px;  --r:3deg;   --stack:0;  --sc:.95}
.s4{background:linear-gradient(165deg,#F5B7C5,#DC8AA2); --x:124px;  --y:-16px; --r:10deg;  --stack:1;  --sc:.975}
.s5{background:linear-gradient(165deg,#FF8FB4,#E35E8D); --x:238px;  --y:-54px; --r:17deg;  --stack:2;  --sc:1}
.s1{animation-delay:.06s} .s2{animation-delay:.12s} .s3{animation-delay:.18s}
.s4{animation-delay:.24s} .s5{animation-delay:.3s}
@keyframes gather{
  0%{opacity:0; transform:translate(calc(-50% + var(--x)),calc(-50% + var(--y))) rotate(var(--r)) scale(.94)}
  35%{opacity:1}
  100%{opacity:1; transform:translate(-50%,calc(-50% + var(--stack) * 7px)) rotate(0deg) scale(var(--sc))}
}
.acard.finalcard{z-index:9; width:234px; aspect-ratio:3/3.6; align-items:center; justify-content:center; gap:14px; z-index:5;
  background:linear-gradient(170deg,#FFFFFF,#FFF0F5 62%,#FFE2EC); border:1px solid rgba(255,94,147,.22);
  color:var(--ink); box-shadow:0 34px 60px -30px rgba(88,16,48,.45), inset 0 1px 0 #fff, 0 0 0 6px rgba(255,255,255,.5);
  animation:brandIn .8s cubic-bezier(.2,.7,.3,1) 1.06s both}
.acard.finalcard img{width:94px; height:94px; border-radius:20px; box-shadow:0 14px 26px -14px rgba(88,16,48,.55)}
.acard.finalcard .word{font-size:12.5px; letter-spacing:.42em; font-weight:700; color:var(--pink-dark); padding-left:.42em}
.acard.finalcard::after{background:linear-gradient(122deg,rgba(255,255,255,.9) 0 22%,rgba(255,255,255,0) 46%)}
@keyframes brandIn{from{opacity:0; transform:translate(-50%,-40%) scale(.9)} to{opacity:1; transform:translate(-50%,-50%) scale(1)}}
.sheen{position:absolute; left:50%; top:50%; width:234px; height:318px; border-radius:16px; overflow:hidden;
  transform:translate(-50%,-50%); pointer-events:none; z-index:6}
.sheen::before{content:""; position:absolute; inset:-20% -140%;
  background:linear-gradient(100deg,transparent 38%,rgba(255,255,255,.85) 50%,transparent 62%);
  transform:translateX(-70%); animation:sheen 1.35s ease-out 1.5s both}
@keyframes sheen{to{transform:translateX(70%)}}
.floor{position:absolute; left:50%; bottom:-14px; width:76%; height:44px; transform:translateX(-50%);
  background:radial-gradient(60% 60% at 50% 50%,rgba(120,20,60,.22),transparent 72%); filter:blur(6px)}
.icon-mirror{position:absolute; left:50%; bottom:-4px; width:94px; transform:translateX(-50%) scaleY(-1);
  opacity:.14; filter:blur(1.2px); border-radius:20px;
  -webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.85),transparent 78%);
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.85),transparent 78%)}
.points{list-style:none; margin:26px 0 0; padding:0; display:grid; gap:7px; max-width:27em}
.points li{display:flex; gap:10px; align-items:baseline; font-size:14px; color:var(--ink-2)}
.points .mono{flex:0 0 auto; min-width:54px; font-size:10.5px; letter-spacing:.14em; color:var(--pink-dark); font-weight:700}
@media (prefers-reduced-motion:reduce){
  .acard,.sheen::before{animation:none; opacity:1}
  .s1,.s2,.s3,.s4,.s5{transform:translate(-50%,calc(-50% + var(--stack) * 7px)) scale(var(--sc))}
  .acard.finalcard{transform:translate(-50%,-50%)}
}
@media (max-width:860px){
  .deck{aspect-ratio:1/.86}
  .acard{width:150px}
  .acard.finalcard{width:166px}
  .acard b{font-size:24px}
  .s1{--x:-128px; --y:-38px} .s2{--x:-64px} .s3{--x:4px; --y:10px}
  .s4{--x:68px; --y:-12px} .s5{--x:132px; --y:-42px}
  .sheen{width:166px; height:228px}
}