/* 着陆页：首屏是夜色里的真实卫星地图，项目点像灯光一样亮着；下面的内容安静、克制，沿用 valynwang.com 的字体和橙色。 */
:root{
  --night:#0c1d24; --night-2:#163039; --paper:#fbf8f5; --white:#fff; --ink:#151312; --muted:#6f6863; --line:#ebe4de;
  --accent:#ff914d; --accent-ink:#b4561a; --ok:#2f8a4e;
  --c-sf:#ff914d; --c-mf:#2bb3b3; --c-com:#7d8bff; --c-demo:#ff6b55; --c-lu:#b98af0; --c-infra:#4fbf7f;
  --display:"Gilda Display","Noto Serif SC",Georgia,serif;
  --body:"Poppins","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --zh:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --zh-display:"Noto Serif SC","Songti SC",serif;
  color-scheme:light;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);font-size:16px;line-height:1.6}
html[lang="zh"] body{font-family:var(--zh)}
a{color:var(--accent-ink)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.wrap{max-width:1120px;margin:0 auto;padding-left:max(24px,env(safe-area-inset-left,0px));padding-right:max(24px,env(safe-area-inset-right,0px))}
h1,h2{font-family:var(--display);font-weight:400;letter-spacing:-.01em}
html[lang="zh"] h1,html[lang="zh"] h2{font-family:var(--zh-display);font-weight:500;letter-spacing:0}

/* ---------- 首屏 ---------- */
.hero{position:relative;min-height:max(640px,100svh);color:#fff;background:var(--night);overflow:hidden;display:flex;flex-direction:column}
.hero-map{position:absolute;inset:0}
.hero-map .maplibregl-ctrl-attrib{background:rgba(12,29,36,.6);color:rgba(255,255,255,.7);font-size:10px}
.hero-map .maplibregl-ctrl-attrib a{color:rgba(255,255,255,.8)}
.hero-shade{position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(90deg,rgba(12,29,36,.92) 0%,rgba(12,29,36,.72) 38%,rgba(12,29,36,.18) 72%,rgba(12,29,36,.05) 100%),
             linear-gradient(0deg,rgba(12,29,36,.85) 0%,rgba(12,29,36,0) 30%)}
.bar{position:relative;z-index:2;display:flex;align-items:center;gap:16px;padding:18px max(24px,env(safe-area-inset-left,0px))}
.brand{display:flex;align-items:center;gap:12px;color:#fff;text-decoration:none}
.brand .mark{width:40px;height:40px;border-radius:50%;border:1px solid rgba(255,255,255,.55);display:grid;place-items:center;font-family:var(--display);font-size:16px}
.brand b{display:block;font-family:var(--display);font-weight:400;font-size:19px;line-height:1.1}
.brand small{display:block;color:rgba(255,255,255,.7);font-size:12px}
.bar-r{margin-left:auto;display:flex;align-items:center;gap:18px}
.bar-r a{color:#fff;text-decoration:none;font-size:14px}
.bar-r .lang{opacity:.8}
.bar-r a:hover{text-decoration:underline}
.bar-btn{border:1px solid rgba(255,255,255,.7);border-radius:999px;padding:8px 16px}
.bar-btn:hover{background:#fff;color:var(--night)!important;text-decoration:none!important}

.hero-body{position:relative;z-index:2;margin:auto 0;padding:24px max(24px,env(safe-area-inset-left,0px)) 40px;max-width:720px}
.hero h1{font-size:clamp(42px,6.4vw,82px);line-height:1.02;margin:0 0 22px;max-width:11ch}
html[lang="zh"] .hero h1{max-width:9em;line-height:1.18;font-size:clamp(38px,5.6vw,68px)}
.lead{font-size:clamp(16px,1.6vw,19px);line-height:1.6;color:rgba(255,255,255,.86);max-width:36em;margin:0 0 28px}
.look{display:flex;max-width:560px;background:#fff;border-radius:14px;padding:6px;box-shadow:0 20px 50px rgba(0,0,0,.35)}
.look input{flex:1;min-width:0;border:0;background:transparent;padding:12px 14px;font:inherit;font-size:17px;color:var(--ink)}
.look input:focus{outline:none}
.look:focus-within{outline:2px solid var(--accent);outline-offset:3px}
.look button{border:0;border-radius:10px;background:var(--accent);color:var(--ink);font:inherit;font-weight:600;font-size:16px;padding:0 22px;cursor:pointer;white-space:nowrap}
.look button:hover{background:#ffa266}
.look-err{margin:10px 0 0;color:#ffd2b8;font-size:14px}
.hero-foot{display:flex;flex-wrap:wrap;gap:8px 22px;align-items:baseline;margin:18px 0 0;font-size:14px;color:rgba(255,255,255,.72)}
.hero-foot a{color:#fff;font-weight:500}
.legend{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:6px 18px;padding:0 max(24px,env(safe-area-inset-left,0px)) 22px;font-size:12.5px;color:rgba(255,255,255,.75)}
.legend i{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:7px;box-shadow:0 0 8px currentColor}

/* ---------- 为什么看 ---------- */
main section{padding-top:96px}
main h2{font-size:clamp(30px,3.6vw,44px);line-height:1.12;margin:0 0 18px}
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;margin-top:36px}
.why-item{border-top:1px solid var(--line);padding-top:22px}
.why-dot{display:block;width:12px;height:12px;border-radius:50%;margin-bottom:16px}
.why h3{font-size:19px;font-weight:600;margin:0 0 8px}
.why p{margin:0;color:var(--muted)}

/* ---------- 功能 ---------- */
.feat-row{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;padding:56px 0;border-bottom:1px solid var(--line)}
.feat-row.rev .feat-txt{order:2}
.feat-txt p{color:var(--muted);font-size:17px;max-width:30em;margin:0}
.snip{position:relative;margin:0;background:var(--white);border:1px solid var(--line);border-radius:16px;padding:22px 24px;box-shadow:0 24px 60px rgba(21,19,18,.08);font-size:14px}
.snip .ex{position:absolute;top:12px;right:14px;font-size:11px;color:var(--muted);background:var(--paper);border-radius:999px;padding:2px 9px}
.sc-kind{display:flex;align-items:center;gap:8px;font-size:13px;color:#1f8a8a;font-weight:500}
.sc-kind i{width:10px;height:10px;border-radius:50%}
.sc-title{font-family:var(--display);font-size:28px;margin:8px 0 2px}
html[lang="zh"] .sc-title{font-family:var(--zh-display)}
.sc-addr{color:var(--muted);margin-bottom:16px}
.snip dl{display:grid;grid-template-columns:1fr 1fr;gap:12px 18px;margin:0;border-top:1px solid var(--line);padding-top:14px}
.snip dl .w{grid-column:1/-1}
.snip dt{font-size:12px;color:var(--muted)}
.snip dd{margin:2px 0 0;font-weight:500}
.pill{display:inline-block;border-radius:999px;padding:2px 10px;font-size:12.5px;background:#fff1e3;color:var(--accent-ink);font-weight:500}
.pill.ok{background:#e6f4ea;color:var(--ok)}
.snip-env{background:var(--night);color:#fff;border-color:var(--night)}
.snip-env .ex{background:var(--night-2);color:rgba(255,255,255,.7)}
.snip-env ul{list-style:none;margin:10px 0 0;padding:0}
.snip-env li{display:flex;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.12)}
.snip-env li:last-child{border-bottom:0}
.snip-env li span{color:rgba(255,255,255,.7)}
.snip-mail{max-width:420px;justify-self:center;width:100%}
.mail-from{font-weight:600}
.mail-sub{margin:2px 0 14px;color:var(--muted)}
.mail-body{font-family:var(--display);font-size:22px;margin-bottom:12px}
html[lang="zh"] .mail-body{font-family:var(--zh-display)}
.mail-st{display:flex;align-items:center;gap:10px;color:var(--muted)}
.mail-st svg{width:22px;height:22px}
.also{color:var(--muted);margin:32px 0 0;max-width:46em}

/* ---------- 免费注册 ---------- */
.cmp{margin-top:96px;padding:88px 0 96px;background:var(--white);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cmp-p{color:var(--muted);max-width:36em;margin:0}
.cmp-grid{display:grid;grid-template-columns:1fr 1.25fr;gap:28px;margin-top:40px;align-items:start}
.cmp-col{border:1px solid var(--line);border-radius:16px;padding:26px 28px}
.cmp-col.mem{border:2px solid var(--accent);background:#fffaf6}
.cmp-col h3{margin:0 0 14px;font-size:18px;font-weight:600}
.cmp-col ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.cmp-col li{padding-left:28px;position:relative}
.cmp-col li::before{content:"";position:absolute;left:4px;top:.55em;width:10px;height:10px;border-radius:50%;background:var(--line)}
.cmp-col.mem li::before{background:var(--accent)}
.btn-join,.btn-ask{display:inline-block;margin-top:24px;background:var(--ink);color:#fff;text-decoration:none;border-radius:12px;padding:14px 22px;font-weight:500}
.btn-join:hover,.btn-ask:hover{background:#2c2826}

/* ---------- Valyn ---------- */
.about{display:grid;grid-template-columns:200px 1fr;gap:48px;align-items:center}
.about-photo{width:200px;height:200px;border-radius:50%;background:var(--night);color:#fff;display:grid;place-items:center;font-family:var(--display);font-size:56px;position:relative}
.about-photo::after{content:"";position:absolute;inset:-10px;border-radius:50%;border:1px solid var(--accent)}
.about p{color:var(--muted);font-size:17px;max-width:34em;margin:0}

/* ---------- 问题 ---------- */
.faq{max-width:820px}
.faq details{border-bottom:1px solid var(--line);padding:18px 0}
.faq summary{cursor:pointer;font-weight:500;font-size:17px;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent-ink);font-size:22px;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{color:var(--muted);margin:10px 0 0}

.foot{padding-top:72px;padding-bottom:48px;font-size:13px;color:var(--muted)}
.foot p{margin:0 0 6px}

/* ---------- 手机 ---------- */
@media (max-width:820px){
  .bar-r .bar-link{display:none}
  .hero-shade{background:linear-gradient(180deg,rgba(12,29,36,.55) 0%,rgba(12,29,36,.82) 55%,rgba(12,29,36,.95) 100%)}
  .hero-body{margin-top:auto}
  .look{flex-direction:column;gap:6px}
  .look button{padding:12px}
  .legend{display:none}
  main section{padding-top:72px}
  .why-grid,.feat-row,.cmp-grid,.about{grid-template-columns:1fr;gap:28px}
  .feat-row.rev .feat-txt{order:0}
  .about-photo{width:140px;height:140px;font-size:40px}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto}}

/* 搜索框下面：免费注册的一句话 */
.hero-free{margin:12px 0 0;font-size:14px;color:rgba(255,255,255,.82)}
.hero-free a{color:#ffb27f;font-weight:500;text-decoration:underline;text-underline-offset:3px;white-space:nowrap}
.also a{color:var(--ink);text-decoration:underline;text-underline-offset:3px}
/* 手机顶栏：“免费注册”按钮（电脑上用“免费注册 / 登录”文字链接） */
.bar-join{display:none}
@media (max-width:820px){
  .bar-join{display:inline-flex;align-items:center;min-height:40px;padding:0 14px;border-radius:999px;background:#ff914d;color:#151312;font-weight:600;font-size:14px;text-decoration:none;white-space:nowrap}
  .bar-r{gap:10px}
}
@media (max-width:480px){
  .bar .brand > span:not(.mark){display:none}
  .bar-r .lang{white-space:nowrap}
  .bar{padding-left:16px;padding-right:16px}
  .bar-r .bar-btn{white-space:nowrap;padding:0 12px;min-height:40px;font-size:14px;display:inline-flex;align-items:center}
  .bar-join{padding:0 12px}
  .bar-r{gap:8px}
}