:root{color-scheme:light;--navy:#0B2033;--ink:#12314A;--blue:#00AFE8;--sky:#55D0F3;--pearl:#F4FAFF;--muted:#526E81;--line:#D8E8F1;--coral:#EF6B77;--font:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}
html{min-width:280px;scroll-behavior:smooth}
body{margin:0;min-height:100vh;min-height:100svh;background:radial-gradient(ellipse at 81% 30%,#E5F7FF 0,transparent 47%),var(--pearl);color:var(--ink);font-family:var(--font);-webkit-font-smoothing:antialiased;position:relative;isolation:isolate}
button,a,summary{-webkit-tap-highlight-color:transparent}
a{color:inherit;text-decoration:none}
button{font:inherit}
button,[href],summary{touch-action:manipulation}
button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #098AB8;outline-offset:6px}
[hidden]{display:none!important}
.skip-link{position:absolute;z-index:20;top:12px;left:20px;transform:translateY(-180%);background:var(--navy);color:white;padding:12px 18px;border-radius:8px}
.skip-link:focus{transform:none}
.page-shell{position:relative;z-index:1;width:min(1200px,calc(100% - 96px));margin:0 auto;min-height:100vh;min-height:100svh;display:flex;flex-direction:column}
.site-header{display:flex;align-items:center;justify-content:space-between;min-height:112px;gap:24px;border-bottom:1px solid var(--line)}
.brand{display:inline-flex;flex:none}
.brand img{display:block;width:216px;height:72px;object-fit:contain}
.header-actions{display:flex;align-items:center;gap:30px}
.header-link{font-size:13px;font-weight:600;color:var(--muted);transition:color .2s}
.header-link:hover{color:#11799F}
.language-switch{display:flex;align-items:center;padding:4px;gap:2px;border:1px solid var(--line);border-radius:11px;background:rgba(255,255,255,.75)}
.language-switch button{border:0;background:transparent;color:var(--muted);font-size:12px;font-weight:650;padding:8px 12px;min-height:34px;border-radius:7px;cursor:pointer}
.language-switch button[aria-pressed="true"]{background:var(--navy);color:white;box-shadow:0 2px 5px #0B20331A}
.welcome{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:24px;flex:1;padding:34px 0 20px;min-height:650px}
.welcome-copy{position:relative;z-index:3;padding:15px 0 35px;max-width:565px}
.eyebrow{display:flex;gap:12px;align-items:center;font-size:12px;font-weight:700;letter-spacing:.16em;margin:0 0 26px;color:#3C6C86}
.eyebrow-line{width:30px;height:2px;background:#00A9DA}
.site-status{display:inline-flex;align-items:center;gap:9px;color:#3F687E;font-size:12px;letter-spacing:.015em;margin-bottom:20px;padding:7px 11px 7px 10px;border:1px solid #CBE8F3;border-radius:6px;background:#ECF9FE}
.status-light{width:6px;height:6px;border-radius:50%;background:#078CB9;box-shadow:0 0 0 4px #00AFE810}
h1{font-size:clamp(3.25rem,5.6vw,4.75rem);font-weight:750;line-height:1.14;letter-spacing:-.065em;margin:0 0 25px}
h1>span{display:block}
h1 .accent{color:#008DBD}
html[lang="zh-CN"] h1{font-size:clamp(3.25rem,5.4vw,4.6rem);letter-spacing:-.035em;line-height:1.32}
.intro{color:var(--muted);font-size:15px;line-height:1.95;max-width:450px;margin:0 0 30px;text-wrap:pretty}
.primary-link{display:inline-flex;align-items:center;gap:30px;min-height:48px;padding:14px 21px;background:var(--navy);color:white;border-radius:9px;font-size:13px;font-weight:600;box-shadow:0 5px 15px #0B20330A;transition:background .2s,transform .2s}
.primary-link:hover{background:#17435F;transform:translateY(-2px)}
.primary-link svg{width:19px;height:19px;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.owner-guide{margin-top:24px;max-width:470px}
.owner-guide summary{display:inline-flex;align-items:center;gap:9px;font-size:12px;line-height:1.7;color:var(--muted);cursor:pointer;list-style:none;padding:7px 0}
.owner-guide summary::-webkit-details-marker{display:none}
.owner-guide summary svg{width:15px;height:15px;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s}
.owner-guide[open] summary svg{transform:rotate(180deg)}
.guide-body{background:#FFFFFFC9;border:1px solid var(--line);border-radius:12px;padding:22px 24px;margin-top:10px;box-shadow:0 10px 30px #12314A06}
.guide-body h2{font-size:15px;font-weight:650;line-height:1.5;margin:0 0 15px}
.guide-body ol{margin:0;padding-left:20px;display:grid;gap:14px;color:var(--muted);font-size:12px;line-height:1.8}
.guide-body li{padding-left:4px}
.guide-body li>strong{display:block;color:var(--ink);font-weight:650}
.guide-body li>span{display:block}
.guide-body code{color:var(--ink);font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:11px;background:#E8F4FA;border-radius:4px;padding:2px 4px;overflow-wrap:anywhere}
.guide-note{font-size:11px;line-height:1.8;color:var(--muted);border-top:1px solid var(--line);padding-top:13px;margin:16px 0 0}
.mascot-scene{position:relative;align-self:center;min-width:0;height:605px;display:flex;justify-content:center;align-items:flex-start}
.scene-halo{position:absolute;width:420px;height:420px;top:74px;left:50%;transform:translateX(-50%);border-radius:50%;background:radial-gradient(circle at 40% 35%,#E6FBFF,#C2ECFC 76%,#BBE5F7);opacity:.8}
.scene-halo:after{content:"";position:absolute;inset:14px;border:1px solid #FFFFFFAA;border-radius:50%}
.orbit{position:absolute;border:1px solid #B9E2F3;border-radius:50%;left:50%;top:60px;width:454px;height:454px;transform:translateX(-50%)}
.orbit span{position:absolute;width:9px;height:9px;left:17%;top:11%;background:var(--sky);border:3px solid var(--pearl);box-sizing:content-box;border-radius:50%}
.orbit-two{width:500px;height:500px;top:36px;opacity:.6;transform:translateX(-50%)}
.orbit-two span{width:5px;height:5px;background:#268BB6;left:auto;right:6%;top:73%}
.mascot{position:relative;z-index:2;display:block;object-fit:contain;width:400px;height:600px;max-width:100%;filter:drop-shadow(0 16px 20px #1F7BA511)}
.greeting{position:absolute;z-index:3;top:47px;right:4px;display:flex;align-items:center;gap:12px;padding:13px 15px;border:1px solid #D9EAF3;border-radius:14px 14px 14px 3px;background:#FFFFFFE6;box-shadow:0 8px 26px #12314A07;transform:rotate(5deg)}
.greeting span{font-size:17px;letter-spacing:-.03em;color:#357997;font-weight:600}
.greeting svg{width:21px;height:21px;fill:#FFDDE3;stroke:var(--coral);stroke-width:1}
.scene-spark{position:absolute;color:#4EB9DA;z-index:1;font-family:Georgia,serif;font-weight:400}
.spark-one{left:2%;top:330px;font-size:39px}
.spark-two{right:6%;top:370px;font-size:48px;color:#7FCFE7}
.scene-caption{position:absolute;bottom:-7px;left:0;right:0;display:flex;justify-content:center;align-items:center;gap:14px;font-size:9px;letter-spacing:.2em;color:#527D93}
.caption-rule{height:1px;width:35px;background:#AFCFDF}
.site-footer{display:flex;align-items:center;justify-content:space-between;gap:20px;border-top:1px solid #CFE3EE;padding:22px 0 26px;min-height:78px;color:var(--muted);font-size:11px;line-height:1.7}
.footer-brand{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin:0}
.footer-brand a{color:var(--ink);font-weight:650}
.footer-node{width:6px;height:6px;background:#168DBA;border-radius:50%}
.footer-divider{margin:0 3px;color:#90B1C4}
.footer{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:11px;color:#52758C;overflow-wrap:anywhere}
.footer strong{font-weight:600;color:var(--ink)}
.ocean{position:absolute;z-index:-1;bottom:0;left:0;width:100%;height:210px;pointer-events:none;opacity:.75}
@media(min-width:1500px){.welcome{max-height:800px}.page-shell{justify-content:center}.welcome-copy{padding-left:6px}}
@media(max-width:1100px){.page-shell{width:calc(100% - 64px)}.welcome{grid-template-columns:1fr .95fr;gap:12px;min-height:600px}.mascot-scene{height:550px}.mascot{width:360px;height:540px}.scene-halo{width:340px;height:340px;top:92px}.orbit{width:366px;height:366px;top:79px}.orbit-two{width:405px;height:405px;top:60px}.greeting{right:-3px;top:45px;padding:10px 12px}.greeting span{font-size:15px}.scene-caption{bottom:1px}h1{font-size:clamp(2.9rem,5.7vw,4.3rem)}html[lang="zh-CN"] h1{font-size:clamp(3rem,5.9vw,4rem)}.intro{font-size:14px}.site-footer{font-size:10px}}
@media(max-width:767px){.page-shell{width:calc(100% - 44px)}.site-header{min-height:88px;gap:12px}.brand img{width:174px;height:58px}.header-actions{gap:14px}.header-link{display:none}.language-switch{padding:3px;border-radius:9px}.language-switch button{font-size:11px;padding:6px 9px;min-height:32px}.welcome{grid-template-columns:1fr;gap:0;padding:40px 0 15px;min-height:0}.welcome-copy{padding:0 5px;max-width:540px;width:100%;margin:0 auto}.eyebrow{margin-bottom:20px;font-size:10px;letter-spacing:.13em}.site-status{font-size:10px;margin-bottom:17px;padding:6px 9px}h1{font-size:clamp(2.8rem,10vw,3.8rem);line-height:1.12;margin-bottom:20px}html[lang="zh-CN"] h1{font-size:clamp(2.8rem,10.5vw,3.75rem);line-height:1.3}.intro{font-size:13px;line-height:1.9;margin-bottom:23px;max-width:430px}.primary-link{font-size:12px;min-height:46px;padding:13px 18px;gap:25px}.owner-guide{margin-top:16px}.owner-guide summary{font-size:11px}.guide-body{padding:18px}.mascot-scene{margin:26px auto 5px;width:100%;max-width:410px;height:475px}.mascot{width:310px;height:465px}.scene-halo{width:290px;height:290px;top:70px}.orbit{width:315px;height:315px;top:57px}.orbit-two{width:345px;height:345px;top:42px}.greeting{right:0;top:30px;padding:10px 12px}.greeting span{font-size:14px}.greeting svg{width:17px;height:17px}.spark-one{top:260px;left:2%;font-size:30px}.spark-two{top:300px;right:1%;font-size:37px}.scene-caption{bottom:0;font-size:8px;letter-spacing:.17em}.site-footer{padding:20px 5px 23px;flex-direction:column;align-items:flex-start;gap:9px;font-size:10px;min-height:0}.footer-brand{gap:7px}.footer-divider{display:none}.footer-brand>[data-i18n="signoff"]{flex-basis:100%;padding-left:13px}.footer{font-size:10px}.ocean{height:260px}.guide-body ol{font-size:12px}}
@media(max-width:359px){.page-shell{width:calc(100% - 32px)}.brand img{width:148px;height:50px}.language-switch button{padding:6px 7px}.mascot-scene{height:430px}.mascot{height:420px;width:280px}.scene-halo{width:240px;height:240px}.orbit{width:260px;height:260px;top:60px}.orbit-two{width:282px;height:282px;top:49px}.greeting{top:26px;right:0}.greeting span{font-size:12px}.spark-two{top:300px}.scene-caption{bottom:0}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}