/* ============================================================
   观星者 · 全站样式（style.css）
   深色夜空主题 · 响应式（手机 / PC 通用）
   ============================================================ */
:root{
  --bg:#070b14;
  --bg2:#0b1220;
  --card:#0f1a2b;
  --card2:#13213a;
  --line:rgba(120,160,220,.18);
  --txt:#dde6f5;
  --txt2:#9fb0c3;
  --txt3:#6b7f99;
  --blue:#8bc8ea;
  --cyan:#94d8c3;
  --gold:#e8b35a;
  --red:#d76a38;
  --green:#6ed3a5;
  --purple:#c9a7e8;
  --nav-h:56px;
}
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--txt);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,Arial,sans-serif;
  font-size:15px;line-height:1.65;
  min-height:100vh;
  background-image:
    radial-gradient(ellipse 80% 50% at 70% -10%,rgba(60,90,160,.16),transparent),
    radial-gradient(ellipse 60% 40% at 10% 110%,rgba(90,60,140,.10),transparent);
  background-attachment:fixed;
}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-thumb{background:rgba(120,160,220,.28);border-radius:4px}
::-webkit-scrollbar-track{background:transparent}
.hidden{display:none!important}

/* ---------- 顶部导航 ---------- */
.topbar{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:var(--nav-h);
  display:flex;align-items:center;gap:14px;
  padding:0 18px;
  background:rgba(7,11,20,.88);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:9px;font-size:17px;font-weight:700;color:#fff;white-space:nowrap}
.brand .logo{
  width:30px;height:30px;border-radius:50%;
  background:radial-gradient(circle at 35% 35%,#ffe9b8,var(--gold) 40%,#5a7ac0 90%);
  box-shadow:0 0 14px rgba(232,179,90,.55);
  position:relative;flex:0 0 auto;
}
.brand .logo::after{
  content:"";position:absolute;left:50%;top:50%;width:4px;height:4px;border-radius:50%;
  background:#fff;transform:translate(-50%,-50%);box-shadow:0 0 4px #fff;
}
.brand small{font-size:11px;color:var(--txt3);font-weight:400;display:block;line-height:1.1}
.nav{display:flex;gap:2px;overflow-x:auto;flex:1;scrollbar-width:none}
.nav::-webkit-scrollbar{display:none}
.nav a{
  color:var(--txt2);font-size:13.5px;padding:7px 11px;border-radius:9px;
  white-space:nowrap;transition:all .18s;
}
.nav a:hover{color:#fff;background:rgba(120,160,220,.12);text-decoration:none}
.nav a.on{color:#fff;background:rgba(139,200,234,.18);box-shadow:inset 0 0 0 1px rgba(139,200,234,.25)}
.loc-pill{
  display:flex;align-items:center;gap:5px;font-size:12px;color:var(--txt2);
  background:rgba(120,160,220,.1);border:1px solid var(--line);
  padding:5px 10px;border-radius:20px;cursor:pointer;white-space:nowrap;
}
.loc-pill:hover{background:rgba(120,160,220,.2)}

/* ---------- 视图容器 ---------- */
main{max-width:1080px;margin:0 auto;padding:calc(var(--nav-h) + 18px) 16px 48px}
.view{display:none;animation:fadeIn .3s ease}
.view.on{display:block}
@keyframes fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* ---------- 通用组件 ---------- */
.card{
  background:linear-gradient(160deg,var(--card),var(--card2));
  border:1px solid var(--line);border-radius:14px;padding:16px;margin-bottom:14px;
}
.card h3{font-size:15px;margin-bottom:10px;color:#fff;display:flex;align-items:center;gap:7px}
.card h3::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--blue);display:inline-block}
.muted{color:var(--txt2);font-size:13px}
.small{font-size:12px;color:var(--txt3)}
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px}
.grid3{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px}
.grid4{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
.pill{display:inline-block;font-size:11.5px;padding:2px 9px;border-radius:12px;background:rgba(120,160,220,.14);color:var(--blue);border:1px solid rgba(120,160,220,.2)}
.badge{display:inline-block;font-size:11px;padding:1px 8px;border-radius:10px;color:#08121f;font-weight:600}
.badge.b1{background:#6ed3a5}.badge.b2{background:#e8b35a}.badge.b3{background:#d76a38}
button.btn{
  border:none;border-radius:10px;padding:9px 16px;font-size:14px;cursor:pointer;
  background:linear-gradient(135deg,#3d6aa8,#2c4f86);color:#fff;
  transition:filter .15s;font-family:inherit;
}
button.btn:hover{filter:brightness(1.15)}
button.btn.ghost{background:rgba(120,160,220,.12);border:1px solid rgba(120,160,220,.3);color:var(--txt)}
select,input[type=text],input[type=number],input[type=date],input[type=time],input[type=datetime-local],textarea{
  background:rgba(10,17,30,.7);border:1px solid var(--line);color:var(--txt);
  border-radius:9px;padding:8px 10px;font-size:14px;font-family:inherit;outline:none;
}
select:focus,input:focus,textarea:focus{border-color:rgba(139,200,234,.5)}
input[type=range]{accent-color:var(--blue);width:100%}
input[type=checkbox]{accent-color:var(--blue)}
table{width:100%;border-collapse:collapse;font-size:13.5px}
th,td{padding:8px 10px;text-align:left;border-bottom:1px solid rgba(120,160,220,.1)}
th{color:var(--txt2);font-weight:600;font-size:12.5px;white-space:nowrap}
tr:hover td{background:rgba(120,160,220,.05)}

/* ---------- 首页 ---------- */
.hero{
  position:relative;border-radius:18px;overflow:hidden;margin-bottom:16px;
  border:1px solid var(--line);min-height:220px;display:flex;align-items:flex-end;
}
.hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.72}
.hero .shade{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,11,20,.1),rgba(7,11,20,.72) 78%);
}
.hero .box{position:relative;padding:20px 22px;z-index:1}
.hero h2{font-size:22px;color:#fff;margin-bottom:4px}
.hero p{color:var(--txt2);font-size:13.5px;max-width:640px}
.quick-tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-bottom:16px}
.tile{
  display:flex;flex-direction:column;gap:6px;padding:14px;border-radius:14px;
  background:linear-gradient(160deg,var(--card),var(--card2));
  border:1px solid var(--line);cursor:pointer;transition:transform .15s,border-color .15s;
}
.tile:hover{transform:translateY(-2px);border-color:rgba(139,200,234,.45)}
.tile .ic{font-size:20px;line-height:1}
.tile b{font-size:14.5px;color:#fff}
.tile span{font-size:12px;color:var(--txt3)}
.home-snapshot{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:14px}
.snap{background:rgba(120,160,220,.07);border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.snap .k{font-size:12px;color:var(--txt3)}
.snap .v{font-size:15.5px;color:#fff;margin-top:2px}
.snap .v em{font-style:normal;color:var(--gold);font-size:13px}

/* ---------- 预报页 ---------- */
.cond-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:12px}
.cond-row label{font-size:13px;color:var(--txt2)}
.seg{display:inline-flex;background:rgba(10,17,30,.7);border:1px solid var(--line);border-radius:10px;overflow:hidden}
.seg button{
  border:none;background:transparent;color:var(--txt2);font-size:13px;padding:7px 14px;cursor:pointer;font-family:inherit;
}
.seg button.on{background:rgba(139,200,234,.2);color:#fff}
.index-hero{
  display:flex;align-items:center;gap:18px;flex-wrap:wrap;
  background:linear-gradient(135deg,rgba(40,70,120,.35),rgba(20,35,60,.35));
  border:1px solid var(--line);border-radius:14px;padding:16px 18px;margin-bottom:14px;
}
.index-num{font-size:44px;font-weight:800;line-height:1;letter-spacing:-1px}
.index-num small{font-size:14px;font-weight:400;color:var(--txt3)}
.index-txt{flex:1;min-width:200px}
.index-txt b{font-size:16px;display:block}
.index-txt span{font-size:12.5px;color:var(--txt2)}
.chart-box{width:100%;height:290px}
.fc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:10px;margin-top:10px}
.fc{background:rgba(120,160,220,.06);border:1px solid var(--line);border-radius:10px;padding:9px 11px}
.fc .t{font-size:11px;color:var(--txt3)}
.fc .v{font-size:14.5px;color:#fff}
.fc .v.bad{color:var(--red)}.fc .v.ok{color:var(--gold)}.fc .v.good{color:var(--green)}
.demo-note{
  font-size:12px;color:var(--gold);background:rgba(232,179,90,.08);
  border:1px dashed rgba(232,179,90,.4);border-radius:9px;padding:8px 12px;margin:8px 0;
}
.watch-list{margin-top:12px}
.watch-item{
  display:flex;align-items:center;gap:12px;padding:11px 13px;border-radius:11px;
  background:rgba(120,160,220,.06);border:1px solid var(--line);margin-bottom:9px;
}
.watch-item .no{width:34px;height:34px;border-radius:50%;background:rgba(139,200,234,.15);color:var(--blue);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;flex:0 0 auto}
.watch-item .nm{flex:1;min-width:0}
.watch-item .nm b{display:block;font-size:14px;color:#fff}
.watch-item .nm span{font-size:12px;color:var(--txt3)}
.watch-item .ok{font-size:12px;color:var(--txt2);text-align:right;flex:0 0 auto}
.watch-item .ok b{display:block;font-size:13px}
.watch-item .ok.good b{color:var(--green)}.watch-item .ok.mid b{color:var(--gold)}.watch-item .ok.bad b{color:var(--red)}

/* ---------- 今夜天象 ---------- */
.moon-card{display:flex;gap:20px;align-items:center;flex-wrap:wrap}
.moon-svg{width:150px;height:150px;flex:0 0 auto}
.moon-info{flex:1;min-width:220px}
.moon-info b{font-size:22px;color:#fff}
.moon-info .row{display:flex;justify-content:space-between;font-size:13px;color:var(--txt2);border-bottom:1px dashed rgba(120,160,220,.14);padding:6px 0}
.moon-info .row span:last-child{color:#fff}
.planet-row{
  display:flex;align-items:center;gap:12px;padding:11px 13px;border-radius:11px;
  background:rgba(120,160,220,.06);border:1px solid var(--line);margin-bottom:9px;
}
.planet-row .dot{width:12px;height:12px;border-radius:50%;flex:0 0 auto;box-shadow:0 0 8px currentColor}
.planet-row .nm{flex:1;min-width:0}
.planet-row .nm b{font-size:14px;color:#fff}
.planet-row .nm span{font-size:12px;color:var(--txt3);display:block}
.planet-row .st{font-size:12.5px;color:var(--txt2);text-align:right}
.planet-row .st b{display:block;font-size:13.5px}
.tz-table td:first-child{white-space:nowrap}
.meteor-note{
  border-left:3px solid var(--purple);background:rgba(201,167,232,.08);
  border-radius:0 10px 10px 0;padding:10px 14px;font-size:13px;color:var(--txt);
}

/* ---------- 星图页 ---------- */
.skymap-wrap{position:relative}
#skyCanvas{width:100%;height:auto;display:block;background:radial-gradient(ellipse at 50% 40%,#0d1830,#05070d 75%);border-radius:14px;border:1px solid var(--line)}
.sky-toolbar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:12px}
.sky-toolbar .grow{flex:1;min-width:120px}
.sky-hint{font-size:12px;color:var(--txt3);margin-top:6px}
.legend{display:flex;flex-wrap:wrap;gap:10px;font-size:12px;color:var(--txt2);margin-top:10px}
.legend i{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:4px;vertical-align:-1px}
.legend .big{width:14px;height:14px}
.horizon-line{position:absolute;left:0;right:0;height:1px;background:rgba(139,200,234,.35)}
.ns-mark{position:absolute;font-size:12px;color:rgba(139,200,234,.75)}
.sky-tip{
  position:absolute;background:rgba(10,17,30,.92);border:1px solid rgba(139,200,234,.35);
  border-radius:9px;padding:8px 11px;font-size:12px;pointer-events:none;z-index:5;
  max-width:220px;box-shadow:0 6px 20px rgba(0,0,0,.5);
}
.sky-tip b{display:block;color:#fff;font-size:13px}
.sky-tip span{color:var(--txt2)}

/* ---------- 图鉴页 ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:14px}
.filter-bar .seg button{font-size:12.5px}
.obj-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(225px,1fr));gap:14px}
.obj-card{
  background:linear-gradient(165deg,var(--card),var(--card2));
  border:1px solid var(--line);border-radius:13px;overflow:hidden;cursor:pointer;
  transition:transform .16s,border-color .16s;
}
.obj-card:hover{transform:translateY(-3px);border-color:rgba(139,200,234,.45)}
.obj-img{position:relative;height:132px;overflow:hidden;background:#0a1322}
.obj-img img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.obj-card:hover .obj-img img{transform:scale(1.06)}
.obj-img .tag{position:absolute;top:8px;left:8px;font-size:12px;font-weight:700;color:#08121f;background:rgba(232,179,90,.92);padding:2px 8px;border-radius:9px}
.obj-img .tag.noimg{background:rgba(139,200,234,.9)}
.obj-img .season{position:absolute;top:8px;right:8px;font-size:11px;color:#cfe0f5;background:rgba(8,14,28,.75);padding:1px 7px;border-radius:9px}
.obj-body{padding:11px 13px}
.obj-body b{font-size:14.5px;color:#fff;display:block}
.obj-body .cn{font-size:12px;color:var(--txt2);margin-bottom:7px}
.obj-body .meta{display:flex;flex-wrap:wrap;gap:5px}
.obj-body .meta .pill{font-size:10.5px;padding:1px 7px}
.obj-detail{padding:16px}
.obj-detail .big{width:100%;border-radius:12px;margin-bottom:12px;border:1px solid var(--line)}
.obj-detail table{margin-top:6px}
.obj-detail .desc{font-size:13.5px;color:var(--txt);margin-bottom:10px}
.obj-detail .tip{font-size:12.5px;color:var(--gold);background:rgba(232,179,90,.08);border-radius:9px;padding:9px 12px;margin-top:10px}
.obj-detail .tp{font-size:12px;color:var(--txt3);margin-top:12px;text-align:right}
.stats-line{font-size:12.5px;color:var(--txt2);margin-bottom:10px}

/* ---------- APOD ---------- */
.apod-img{width:100%;border-radius:12px;border:1px solid var(--line);max-height:520px;object-fit:cover;background:#0a1322}
.apod-title{font-size:16px;color:#fff;margin:10px 0 4px}
.apod-credit{font-size:12px;color:var(--txt3);margin-bottom:10px}
.apod-desc{font-size:14px;color:var(--txt)}
.apod-load{text-align:center;color:var(--txt3);padding:40px 0;font-size:13px}
.apod-more{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap}

/* ---------- 学习页 ---------- */
.bortle-row{display:flex;align-items:center;gap:12px;padding:9px 12px;border-radius:10px;margin-bottom:8px;background:rgba(120,160,220,.05);border:1px solid var(--line)}
.bortle-dot{width:26px;height:26px;border-radius:50%;flex:0 0 auto;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:#08121f}
.bortle-row b{font-size:14px;color:#fff;flex:0 0 120px}
.bortle-row span{font-size:12.5px;color:var(--txt2);flex:1}
.step-row{display:flex;gap:12px;margin-bottom:12px}
.step-no{width:30px;height:30px;border-radius:50%;background:rgba(139,200,234,.16);color:var(--blue);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;flex:0 0 auto}
.step-row p{font-size:13.5px;color:var(--txt)}
.step-row b{color:#fff}
.glossary-item{border-bottom:1px dashed rgba(120,160,220,.15);padding:10px 0}
.glossary-item b{color:#fff;font-size:14px}
.glossary-item p{font-size:13px;color:var(--txt2);margin-top:3px}
.lp-tool .result{
  margin-top:12px;padding:14px;border-radius:12px;border:1px solid var(--line);
  background:rgba(120,160,220,.07);
}
.lp-tool .result .lv{font-size:26px;font-weight:800}
.lp-tool .result p{font-size:13px;color:var(--txt2);margin-top:4px}

/* ---------- 日志页 ---------- */
.log-form{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px}
.log-form .full{grid-column:1/-1}
.log-form label{font-size:12px;color:var(--txt2);display:block;margin-bottom:4px}
.log-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(110px,1fr));gap:10px;margin-bottom:14px}
.log-stats .s{background:rgba(120,160,220,.07);border:1px solid var(--line);border-radius:11px;padding:11px;text-align:center}
.log-stats .s b{display:block;font-size:20px;color:#fff}
.log-stats .s span{font-size:11.5px;color:var(--txt3)}
.log-item{
  display:flex;gap:12px;padding:12px 14px;border-radius:11px;
  background:rgba(120,160,220,.05);border:1px solid var(--line);margin-bottom:9px;align-items:flex-start;
}
.log-item .d{flex:1;min-width:0}
.log-item .d b{font-size:14px;color:#fff}
.log-item .d span{font-size:12.5px;color:var(--txt2);display:block;margin-top:2px}
.log-item .d p{font-size:12.5px;color:var(--txt3);margin-top:4px}
.log-item .rm{font-size:12px;color:var(--red);cursor:pointer;background:none;border:none;padding:4px;flex:0 0 auto}
.log-empty{text-align:center;color:var(--txt3);padding:30px 0;font-size:13px}

/* ---------- 弹层 ---------- */
.overlay{
  position:fixed;inset:0;z-index:200;display:none;align-items:center;justify-content:center;
  background:rgba(4,7,14,.78);backdrop-filter:blur(4px);padding:16px;
}
.overlay.on{display:flex}
.dialog{
  background:linear-gradient(165deg,#101c30,#0c1626);
  border:1px solid rgba(120,160,220,.3);border-radius:16px;
  max-width:640px;width:100%;max-height:88vh;overflow-y:auto;
  box-shadow:0 24px 60px rgba(0,0,0,.6);
}
.dialog .x{position:sticky;top:0;float:right;margin:8px;width:30px;height:30px;border-radius:50%;border:none;background:rgba(120,160,220,.12);color:var(--txt);font-size:15px;cursor:pointer;z-index:2}
.dialog .x:hover{background:rgba(120,160,220,.3)}
.city-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:8px;padding:4px 0}
.city-list button{
  border:1px solid var(--line);background:rgba(120,160,220,.07);color:var(--txt);
  border-radius:9px;padding:8px 6px;font-size:13px;cursor:pointer;font-family:inherit;
}
.city-list button:hover,.city-list button.on{background:rgba(139,200,234,.2);border-color:rgba(139,200,234,.5);color:#fff}
.custom-loc{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
footer{
  border-top:1px solid var(--line);padding:20px 16px 30px;text-align:center;
  color:var(--txt3);font-size:12px;background:rgba(7,11,20,.6);
}
footer b{color:var(--txt2)}

/* ---------- 响应式 ---------- */
@media (max-width:720px){
  :root{--nav-h:52px}
  .brand small{display:none}
  .nav a{font-size:13px;padding:6px 9px}
  .loc-pill{font-size:11px;padding:4px 8px}
  .hero h2{font-size:18px}
  .index-num{font-size:34px}
  .chart-box{height:250px}
  .bortle-row b{flex:0 0 84px}
  .moon-svg{width:120px;height:120px}
  .obj-grid{grid-template-columns:repeat(auto-fill,minmax(155px,1fr));gap:10px}
  .obj-img{height:100px}
  .obj-body b{font-size:13.5px}
}