/* Haina Tiancheng customs site — Apple System Settings feel (04_SOP/苹果范的软件UI/05 v2.2) */
:root{
  --blue:#007aff; --blue-soft:rgba(0,122,255,.12);
  --bg:#f5f5f7; --card:#ffffff; --group:rgba(0,0,0,.035);
  --text:#1d1d1f; --text2:#6e6e73; --line:rgba(0,0,0,.08);
  --red:#d70015; --red-soft:rgba(255,59,48,.12);
  --ring:0 0 0 3px rgba(0,122,255,.45);
  --radius:12px; --shadow:0 0 0 .5px rgba(0,0,0,.08),0 2px 12px rgba(0,0,0,.05);
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Text","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root{--blue:#0a84ff;--blue-soft:rgba(10,132,255,.18);--bg:#000;--card:#1c1c1e;--group:rgba(255,255,255,.05);
    --text:#f5f5f7;--text2:#98989d;--line:rgba(255,255,255,.1);--red:#ff453a;--red-soft:rgba(255,69,58,.16);
    --shadow:0 0 0 .5px rgba(255,255,255,.08);color-scheme:dark}
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:15px/1.6 var(--font);-webkit-font-smoothing:antialiased}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.wrap{max-width:980px;margin:0 auto;padding:0 16px}

/* header */
.top{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:.5px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:6px;height:52px}
.brand{font-weight:600;font-size:15px;color:var(--text);margin-right:auto;white-space:nowrap;display:flex;align-items:center;gap:8px;min-height:32px}
.brand:hover{text-decoration:none}
.brand .mark{width:24px;height:24px;border-radius:6px;background:var(--blue);color:#fff;display:grid;place-items:center;font-size:12px;font-weight:700}
.nav{display:flex;gap:2px}
.nav a{color:var(--text);font-size:13px;padding:0 10px;min-height:32px;display:flex;align-items:center;border-radius:8px}
.nav a:hover{background:var(--group);text-decoration:none}
.nav a[aria-current=page]{color:var(--blue);font-weight:600}
.lang{white-space:nowrap;font-size:13px;min-height:32px;padding:0 10px;display:flex;align-items:center;border-radius:8px;border:.5px solid var(--line);color:var(--text)}
.lang:hover{text-decoration:none;background:var(--group)}
.menu-btn{display:none}
@media (max-width:760px){
  .nav{display:none;position:absolute;top:52px;left:0;right:0;flex-direction:column;background:var(--card);padding:8px 16px 12px;box-shadow:0 8px 24px rgba(0,0,0,.12)}
  .nav.open{display:flex}
  .nav a{min-height:44px;font-size:15px}
  .brand .sub{display:none}
  .menu-btn{display:grid;place-items:center;width:36px;height:36px;border:0;background:none;color:var(--text);border-radius:8px;font-size:18px;cursor:pointer}
}

/* type */
h1{font-size:34px;line-height:1.15;letter-spacing:-.02em;margin:0 0 12px;font-weight:700}
h2{font-size:22px;line-height:1.25;letter-spacing:-.01em;margin:40px 0 12px;font-weight:700}
h3{font-size:16px;margin:0 0 6px;font-weight:600}
.lead{font-size:18px;color:var(--text2);margin:0 0 20px;max-width:640px}
.muted{color:var(--text2);font-size:13px}
@media (max-width:760px){h1{font-size:28px}.lead{font-size:16px}}

/* sections */
.hero{padding:56px 0 24px}
.page{padding-top:40px;padding-bottom:64px}
.cta{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:36px;padding:0 18px;border-radius:18px;font:600 14px var(--font);border:0;cursor:pointer;background:var(--blue);color:#fff;transition:transform .12s}
.btn:hover{text-decoration:none;filter:brightness(1.06)}
.btn:active{transform:scale(.97)}
.btn.secondary{background:var(--card);color:var(--text);box-shadow:0 0 0 .5px var(--line) inset,0 1px 2px rgba(0,0,0,.04)}
.btn[disabled]{background:rgba(118,118,128,.16);color:#8e8e93;cursor:default}
.btn.busy{background:var(--blue-soft);color:var(--blue);cursor:default}
:focus-visible{outline:none;box-shadow:var(--ring);border-radius:8px}

.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}
.grid{display:grid;gap:12px}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.grid.c2{grid-template-columns:repeat(2,1fr)}
@media (max-width:760px){.grid.c3,.grid.c2{grid-template-columns:1fr}}
.step .n{width:26px;height:26px;border-radius:50%;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center;font-weight:700;font-size:13px;margin-bottom:10px}
.step p,.card p{margin:0;color:var(--text2);font-size:14px}

.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.stats .card{padding:16px}
.stats b{display:block;font-size:24px;letter-spacing:-.01em}
.stats span{font-size:13px;color:var(--text2)}
@media (max-width:760px){.stats{grid-template-columns:repeat(2,1fr)}}

/* list rows (System Settings group) */
.group{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.row{display:flex;gap:12px;align-items:flex-start;padding:12px 16px;min-height:44px}
.row+.row{border-top:.5px solid var(--line);margin-left:16px;padding-left:0}
.row .k{flex:0 0 200px;font-weight:500}
.row .v{flex:1;color:var(--text2)}
@media (max-width:760px){.row{flex-direction:column;gap:2px}.row .k{flex:none}}

table.price{width:100%;border-collapse:collapse;background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;font-size:14px}
table.price th,table.price td{padding:12px 14px;text-align:left;border-bottom:.5px solid var(--line);vertical-align:top}
table.price thead th{background:var(--group);font-weight:600;font-size:13px}
table.price tr:last-child td{border-bottom:0}
table.price td.num{font-weight:600;white-space:nowrap}
.tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:var(--radius)}

.note{background:var(--blue-soft);border-radius:10px;padding:12px 14px;font-size:14px;margin:16px 0}
.note.warn{background:var(--red-soft)}
ul.clean{padding-left:18px;margin:8px 0}
ul.clean li{margin:4px 0}

details.faq{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);margin:8px 0}
details.faq summary{cursor:pointer;padding:14px 16px;font-weight:600;list-style:none;min-height:44px}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"›";float:right;color:var(--text2);transition:transform .2s}
details.faq[open] summary::after{transform:rotate(90deg)}
details.faq div{padding:0 16px 14px;color:var(--text2)}

/* form */
form.submit .group{margin-bottom:16px}
.field{display:flex;flex-direction:column;gap:6px;padding:12px 16px}
.field+.field{border-top:.5px solid var(--line)}
.field label{font-weight:500;font-size:14px}
.field small{color:var(--text2);font-size:12px}
input[type=text],input[type=email],input[type=tel],select,textarea{font:15px var(--font);color:var(--text);background:var(--bg);border:.5px solid var(--line);border-radius:8px;padding:0 10px;min-height:34px;width:100%}
textarea{padding:8px 10px;min-height:80px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:none;box-shadow:var(--ring)}
input[type=file]{font-size:13px}
.seg{display:inline-flex;background:rgba(118,118,128,.12);border-radius:8px;padding:2px;gap:2px}
.seg label{min-height:30px;padding:0 14px;display:flex;align-items:center;border-radius:6px;font-size:13px;cursor:pointer}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg label:has(input:checked){background:var(--card);box-shadow:0 1px 3px rgba(0,0,0,.12);font-weight:600}
.check{display:flex;gap:10px;align-items:flex-start;font-size:14px;padding:12px 16px;min-height:44px}
.check input{accent-color:var(--blue);width:18px;height:18px;margin-top:2px;flex:none}
.err{color:var(--red);font-size:13px}

/* footer */
footer{border-top:.5px solid var(--line);padding:28px 0 40px;font-size:12px;color:var(--text2)}
footer .wrap{display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between}
footer a{color:var(--text2);display:inline-flex;align-items:center;min-height:26px}
footer nav{display:flex;flex-wrap:wrap;gap:4px 16px}
footer nav a{min-height:26px;display:inline-flex;align-items:center}

/* dialog (Apple style, replaces alert/confirm) */
dialog.ap{border:0;border-radius:14px;padding:20px 20px 16px;width:min(320px,calc(100vw - 32px));background:var(--card);color:var(--text);box-shadow:0 0 0 .5px rgba(0,0,0,.12),0 12px 32px rgba(0,0,0,.25);text-align:center}
dialog.ap::backdrop{background:rgba(0,0,0,.25)}
dialog.ap h3{font-size:15px;margin:4px 0 6px}
dialog.ap p{font-size:13px;color:var(--text2);margin:0 0 16px;white-space:pre-line;text-align:left}
dialog.ap .acts{display:flex;gap:8px}
dialog.ap .acts .btn{flex:1;border-radius:8px;min-height:32px;font-size:13px}
dialog[open].ap{animation:pop .16s ease-out}
@keyframes pop{from{opacity:0;transform:translateY(-6px) scale(.98)}to{opacity:1;transform:none}}

/* ⌘K */
dialog.palette{border:0;padding:0;border-radius:14px;width:min(560px,calc(100vw - 32px));margin-top:12vh;background:color-mix(in srgb,var(--card) 88%,transparent);backdrop-filter:blur(30px);-webkit-backdrop-filter:blur(30px);box-shadow:0 0 0 .5px rgba(0,0,0,.15),0 20px 50px rgba(0,0,0,.3);color:var(--text)}
dialog.palette::backdrop{background:rgba(0,0,0,.12)}
dialog.palette input{border:0;background:transparent;font-size:18px;min-height:52px;padding:0 18px;border-bottom:.5px solid var(--line);border-radius:0;box-shadow:none}
dialog.palette ul{list-style:none;margin:0;padding:6px;max-height:50vh;overflow:auto}
dialog.palette li{padding:0 12px;min-height:36px;display:flex;align-items:center;border-radius:8px;cursor:pointer;font-size:14px}
dialog.palette li.sel{background:var(--blue);color:#fff}

.btn.danger{background:var(--red-soft);color:var(--red)}