:root{--sr-ink:#09212b;--sr-deep:#0b2732;--sr-ocean:#174453;--sr-teal:#20a995;--sr-mint:#70d8c7;--sr-mist:#dcebe8;--sr-ice:#f3f8f6;--sr-line:#b9d0cb}
body.seiran{color:var(--sr-ink);background:var(--sr-ice);font-family:"Hiragino Sans","Yu Gothic UI","Noto Sans CJK JP","Microsoft YaHei",sans-serif;background-image:linear-gradient(rgba(11,39,50,.035) 1px,transparent 1px);background-size:100% 36px}
.seiran header{background:rgba(243,248,246,.94);border-color:var(--sr-line);backdrop-filter:blur(14px)}
.seiran .brand{color:var(--sr-deep);gap:.75rem}.seiran .brand small{color:#547078;letter-spacing:.12em}.seiran-logo{display:block;flex:0 0 46px;border-radius:13px}
.seiran nav a,.seiran .link{color:var(--sr-ink)}.seiran .lang-switch{border-color:var(--sr-line);background:#fff}.seiran .button{border:1px solid var(--sr-deep);background:var(--sr-deep);color:#fff;box-shadow:none}.seiran .button:hover{background:var(--sr-ocean);transform:translateY(-1px)}.seiran .button:disabled{background:#afc2be;border-color:#afc2be;color:#fff}
.seiran a:focus-visible,.seiran button:focus-visible,.seiran input:focus-visible,.seiran textarea:focus-visible{outline:3px solid var(--sr-mint);outline-offset:3px}
.seiran main{max-width:1200px}.seiran .eyebrow{color:#187e70;letter-spacing:.14em}.seiran h1,.seiran h2,.seiran h3{font-family:"Hiragino Sans","Yu Gothic UI","Noto Sans CJK JP",sans-serif;letter-spacing:-.035em}.seiran h1 em{color:var(--sr-teal);font-style:normal}
.seiran-hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(380px,.95fr);gap:clamp(2rem,6vw,5rem);align-items:center;padding:clamp(3rem,7vw,6.5rem) 0 4rem}.seiran-hero-copy h1{font-size:clamp(2.7rem,6vw,5.7rem);line-height:1.03;margin:.65rem 0 1.4rem;max-width:800px}.seiran-hero-copy .lead{font-size:clamp(1.05rem,1.8vw,1.3rem);line-height:1.8;max-width:650px;color:#435f67}.seiran-trust{display:flex;flex-wrap:wrap;gap:.65rem 1.4rem;padding:0;margin:2.2rem 0 0;list-style:none;color:#526d74;font-size:.9rem}.seiran-trust li:before{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--sr-teal);margin-right:.55rem}
.seiran-map{position:relative;min-height:470px;overflow:hidden;border:1px solid #2f6470;border-radius:3px;background:var(--sr-deep);color:#eefaf7;box-shadow:18px 18px 0 var(--sr-mist)}.seiran-map:before,.seiran-map:after{content:"";position:absolute;border:1px solid rgba(112,216,199,.2);border-radius:45%}.seiran-map:before{inset:12% -20% 42% 8%;transform:rotate(-12deg)}.seiran-map:after{inset:38% 12% -20% -25%;transform:rotate(14deg)}.map-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(112,216,199,.09) 1px,transparent 1px),linear-gradient(90deg,rgba(112,216,199,.09) 1px,transparent 1px);background-size:42px 42px}.map-label{position:absolute;font-size:.68rem;letter-spacing:.16em;color:#8fb4b5}.map-label b{display:block;margin-top:.35rem;color:#fff;font-size:.95rem;letter-spacing:.02em}.map-label.origin{left:9%;top:30%}.map-label.destination{right:9%;top:53%;text-align:right}.map-route{position:absolute;left:20%;right:21%;top:45%;height:2px;background:linear-gradient(90deg,var(--sr-mint),#fff);transform:rotate(13deg);transform-origin:left}.map-route:before,.map-route:after{content:"";position:absolute;top:50%;width:12px;height:12px;border:3px solid var(--sr-mint);background:var(--sr-deep);border-radius:50%;transform:translate(-50%,-50%)}.map-route:after{left:100%}.map-route i{position:absolute;width:9px;height:9px;border-radius:50%;background:#fff;box-shadow:0 0 0 7px rgba(112,216,199,.16);animation:seiran-route 4s ease-in-out infinite}.map-status{position:absolute;left:9%;right:9%;bottom:8%;padding-top:1.2rem;border-top:1px solid rgba(112,216,199,.25);display:grid;gap:.35rem}.map-status strong{font-size:2rem}.map-status small{color:#8fb4b5;letter-spacing:.13em}
@keyframes seiran-route{0%,100%{left:0;top:-3px}50%{left:100%;top:-3px}}
.seiran-proof{display:grid;grid-template-columns:repeat(3,1fr);border-block:1px solid var(--sr-line);margin:1rem 0 6rem}.seiran-proof article{position:relative;padding:2rem 2.2rem 2.4rem;border-right:1px solid var(--sr-line)}.seiran-proof article:last-child{border-right:0}.seiran-proof span{color:var(--sr-teal);font:700 .75rem/1 monospace;letter-spacing:.15em}.seiran-proof h2{font-size:1.5rem;margin:1.2rem 0 .65rem}.seiran-proof p{color:#536e75;line-height:1.7;margin:0}
.seiran-plans{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:1rem;align-items:stretch;margin:0 0 6rem}.plans-copy{padding:1.5rem 2rem 1.5rem 0}.plans-copy h2{font-size:clamp(2rem,4vw,3.4rem);margin:.7rem 0 1rem}.plans-copy p{color:#526d74;line-height:1.75}.seiran-plan{padding:2rem;border:1px solid var(--sr-line);background:#fff;display:flex;flex-direction:column}.seiran-plan>span{font:700 .72rem/1 monospace;letter-spacing:.15em;color:var(--sr-teal)}.seiran-plan h3{font-size:1.65rem;margin:2rem 0 .6rem}.seiran-plan strong{font-size:2.25rem}.seiran-plan strong small{display:block;font-size:.8rem;color:#678087;font-weight:500;margin-top:.35rem}.seiran-plan p{color:#526d74;min-height:3rem}.seiran-plan .button{margin-top:auto;text-align:center}.seiran-plan.active{border-top:5px solid var(--sr-teal)}.seiran-plan.pending{background:#e8f0ee;border-top:5px solid #94aaa5}
.seiran-plans.single{grid-template-columns:minmax(0,1.3fr) minmax(300px,.7fr)}
.seiran-flow{margin-bottom:5rem;padding:clamp(2rem,5vw,4rem);background:var(--sr-deep);color:#eefaf7}.seiran-flow h2{font-size:clamp(2rem,4vw,3.2rem)}.seiran-flow ol{display:grid;grid-template-columns:repeat(3,1fr);gap:2rem;list-style:none;padding:2rem 0 0;margin:0;counter-reset:flow}.seiran-flow li{border-top:1px solid #436872;padding-top:1.3rem;display:grid;gap:.6rem}.seiran-flow li b{font-size:1.15rem}.seiran-flow li span{color:#aac2c2;line-height:1.65}
.seiran .panel,.seiran .auth form,.seiran .doc,.seiran .download-grid article,.seiran .status-grid article{border-color:var(--sr-line);box-shadow:none}.seiran .status.ok,.seiran .live{color:#148676}.seiran footer{background:var(--sr-deep);color:#c0d4d2;border:0}.seiran footer a{color:#eefaf7}
@media(max-width:850px){.seiran-hero{grid-template-columns:1fr;padding-top:2.5rem}.seiran-map{min-height:390px}.seiran-proof,.seiran-plans,.seiran-plans.single{grid-template-columns:1fr}.seiran-proof article{border-right:0;border-bottom:1px solid var(--sr-line)}.seiran-flow ol{grid-template-columns:1fr}.plans-copy{padding-left:0}.seiran header{align-items:flex-start}.seiran header nav{justify-content:flex-end}.seiran .brand>span{font-size:.95rem}.seiran .brand small{font-size:.52rem}}
@media(max-width:560px){.seiran .brand:after{content:"青岚";display:block;font-weight:800;letter-spacing:.04em;white-space:nowrap}.seiran .brand>span{display:none}}
@media(max-width:480px){.seiran main{padding-inline:18px}.seiran-hero-copy h1{font-size:2.45rem}.seiran-map{min-height:330px;box-shadow:9px 9px 0 var(--sr-mist)}.map-status strong{font-size:1.55rem}.seiran-trust{display:grid}.seiran-plan{padding:1.5rem}.seiran-proof article{padding-inline:.25rem}.seiran header{padding-inline:12px}.seiran-logo{width:38px;height:38px}}
@media(prefers-reduced-motion:reduce){.map-route i{animation:none;left:50%}.seiran *{scroll-behavior:auto!important;transition:none!important}}