/* Apple 式：整屏色块交替，唯一强调色 = 蓝 */
:root{
  color-scheme:light;
  --canvas:#ffffff; --parchment:#f5f5f7; --pearl:#fafafc;
  --ink:#1d1d1f; --ink-80:#333336; --ink-48:#6e6e73; --hair:#e0e0e5; --hair-soft:rgba(0,0,0,.08);
  --tile:#272729; --on-tile:#ffffff; --on-tile-muted:#c7c7cc;
  --nav:#000000; --nav-ink:#e8e8ed;
  --blue:#0066cc; --blue-focus:#0071e3; --blue-on-tile:#2997ff; --on-blue:#ffffff;
  --frost:rgba(245,245,247,.8);
  --ok:#248a3d; --warn:#b25000; --warn-bg:#fff4e5; --bad:#c9302c;
  --f:-apple-system,BlinkMacSystemFont,"SF Pro Text","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --r-sm:8px; --r-lg:18px; --pill:9999px;
}
@media (prefers-color-scheme: dark){
  :root{
    color-scheme:dark;
    --canvas:#000000; --parchment:#101012; --pearl:#1c1c1e;
    --ink:#f5f5f7; --ink-80:#d2d2d7; --ink-48:#8e8e93; --hair:#2c2c2e; --hair-soft:rgba(255,255,255,.1);
    --tile:#1c1c1e; --frost:rgba(22,22,23,.8);
    --blue:#2997ff; --blue-focus:#2997ff;
    --ok:#30d158; --warn:#ff9f0a; --warn-bg:#2a1f0d; --bad:#ff6961;
  }
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{padding-top:env(safe-area-inset-top,0px)}
body{margin:0;background:var(--canvas);color:var(--ink);font:400 17px/1.47 var(--f);letter-spacing:-.022em;-webkit-font-smoothing:antialiased}
h1,h2,h3{font-weight:600;margin:0;text-wrap:balance}
p{margin:0}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
button{font:inherit;letter-spacing:inherit;cursor:pointer;color:inherit}
button:disabled{opacity:.45;cursor:not-allowed}
:focus-visible{outline:2px solid var(--blue-focus);outline-offset:2px}
.wrap{max-width:980px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.wide{max-width:1180px}

.gnav{position:sticky;top:0;z-index:20;background:var(--nav);height:52px}
.gnav .wrap{height:100%;display:flex;align-items:center;gap:24px;font-size:13px}
.gnav a{color:var(--nav-ink);opacity:.8}
.gnav a:hover{text-decoration:none;opacity:1}
.gnav a[aria-current="page"]{opacity:1;color:#fff}
.gnav .nav-cta{color:#fff;opacity:1;margin-left:4px;padding:6px 16px;font-size:13px}
.gnav .nav-cta:hover{opacity:.9}
.back{display:inline-block;font-size:14px;margin-bottom:14px}
.gnav a{white-space:nowrap}
@media (max-width:520px){.gnav .wrap{gap:16px}.gnav [data-nav="home"]{display:none}.gnav .brand{font-size:14px}}
.gnav .brand{color:#fff;opacity:1;font-weight:600;font-size:15px;margin-right:auto}
.snav{position:sticky;top:44px;z-index:19;background:var(--frost);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--hair-soft)}
.snav .wrap{height:52px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.snav b{font-size:21px}
.snav .note{font-size:12px;color:var(--ink-48)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border-radius:var(--pill);padding:11px 22px;font-size:17px;border:1px solid var(--blue);background:var(--blue);color:var(--on-blue);transition:transform .12s;text-decoration:none!important}
.btn:active{transform:scale(.95)}
.btn.ghost{background:transparent;color:var(--blue)}
.btn.sm{padding:6px 14px;font-size:14px}
.tile-dark .btn.ghost{color:var(--blue-on-tile);border-color:var(--blue-on-tile)}
.ctas{display:flex;gap:14px;flex-wrap:wrap;justify-content:center}

section.tile{padding-block:80px}
.tile-light{background:var(--canvas)}
.tile-parch{background:var(--parchment)}
.tile-dark{background:var(--tile);color:var(--on-tile)}
.center{text-align:center}
.hero h1{font-size:clamp(30px,8.6vw,64px);line-height:1.07;letter-spacing:-.015em}
.eyebrow{font-size:17px;font-weight:600;color:var(--blue);margin-bottom:12px}
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:56px;padding-top:32px;border-top:1px solid var(--hair)}
.facts div{display:grid;gap:4px}
.facts b{font-size:28px;font-weight:600;letter-spacing:-.02em}
.facts span{font-size:14px;color:var(--ink-48)}
@media (max-width:640px){.facts{grid-template-columns:1fr 1fr}}
.hero .lead{font-size:clamp(19px,2.4vw,24px);line-height:1.35;margin:16px auto 28px;max-width:32ch;color:var(--ink-80)}
h2.big{font-size:clamp(32px,5vw,48px);line-height:1.1;letter-spacing:-.01em}
.sub{font-size:21px;line-height:1.38;color:var(--ink-48);margin-top:10px}
.tile-dark .sub,.tile-dark .muted{color:var(--on-tile-muted)}
.muted{color:var(--ink-48)}
.small{font-size:14px;line-height:1.43}
.fine{font-size:12px;line-height:1.4;color:var(--ink-48)}

.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;margin-top:56px;text-align:left}
.steps .n{font-size:14px;font-weight:600;color:var(--blue-on-tile)}
.steps h3{font-size:21px;line-height:1.2;margin:10px 0 6px}
@media (max-width:760px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:420px){.steps{grid-template-columns:1fr}}

.cases{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:48px}
@media (max-width:900px){.cases{grid-template-columns:repeat(2,1fr)}}
@media (max-width:480px){.cases{grid-template-columns:1fr}}
.case .desc{font-size:14px;line-height:1.5;color:var(--ink-80)}
.case .meta b{font-weight:600;color:var(--ink)}
/* 风格示意图：纯 CSS，画个人影 + 该风格的标志动作 */
.art{align-items:center;justify-content:center;background:#2a2a2c}
.art .person{position:absolute;left:50%;bottom:0;width:58%;height:62%;transform:translateX(-50%);z-index:2}
.art .person::before{content:"";position:absolute;left:50%;top:0;width:38%;aspect-ratio:1;border-radius:50%;background:#55555b;transform:translateX(-50%)}
.art .person::after{content:"";position:absolute;left:0;right:0;bottom:0;height:62%;border-radius:48% 48% 0 0;background:#55555b}
.art .person.dim::before,.art .person.dim::after{background:#3a3a3e}
.art-behind{position:absolute;top:27%;left:0;right:0;text-align:center;font-size:clamp(56px,9vw,96px);font-weight:800;color:#b71c1c;letter-spacing:-.04em;z-index:1}
.art-sub{position:absolute;bottom:14%;left:0;right:0;text-align:center;color:#fff;font-size:13px;font-weight:600;z-index:3}
.art-pop{position:absolute;top:48%;left:0;right:0;text-align:center;font-size:clamp(34px,5vw,48px);font-weight:800;color:#ffc53d;z-index:3;transform:rotate(-4deg)}
.art-quote{position:absolute;left:12%;right:10%;top:15%;z-index:3;display:grid;gap:8px;color:#fff;font-size:14px;font-weight:600;text-align:left}
.art-quote em{font-style:normal;color:#ffc53d}
.art-info{position:absolute;inset:16% 12%;display:grid;gap:14px;align-content:start;z-index:3}
.art-info .card-img{display:block;aspect-ratio:4/3;border-radius:8px;background:#f5f5f7}
.art-info ol{margin:0;padding-left:1.2em;color:#fff;font-weight:700;font-size:16px;display:grid;gap:6px;text-align:left}
.art-data{position:absolute;inset:18% 14% 14%;display:grid;grid-template-rows:auto 1fr;gap:16px;z-index:3;text-align:left}
.art-data b{font-size:clamp(32px,5vw,44px);color:#ffc53d;font-weight:800;letter-spacing:-.03em}
.art-data .bars{display:flex;align-items:flex-end;gap:12%;border-bottom:2px solid #6e6e73}
.art-data .bars i{flex:1;background:#8e8e93;border-radius:4px 4px 0 0}
.art-data .bars i.hi{background:#ffc53d}
.art-talk{position:absolute;inset:0;z-index:2}
.art-talk .person{width:46%;height:52%}
.art-talk .person:first-child{left:28%}
.art-talk .person:last-child{left:72%}
.art-name{position:absolute;left:10%;bottom:12%;z-index:3;background:#ffc53d;color:#1d1d1f;font-size:12px;font-weight:700;padding:4px 10px;border-radius:4px}
.case{background:var(--canvas);border-radius:var(--r-lg);padding:16px;display:flex;flex-direction:column;gap:12px;text-align:left}
.frame{aspect-ratio:9/16;max-width:100%;border-radius:12px;background:var(--tile);color:#fff;position:relative;overflow:hidden;display:flex;align-items:flex-end;padding:14px}
.frame .big{position:absolute;left:14px;right:14px;top:38%;font-weight:700;font-size:24px;line-height:1.15;letter-spacing:-.02em;text-align:center}
.frame .big em{font-style:normal;color:#ffc53d}
.frame .cap{font-size:12px;width:100%;text-align:center;background:rgba(0,0,0,.35);padding:4px 6px;border-radius:6px}
.frame .tag{position:absolute;top:10px;left:10px;font-size:11px;padding:3px 8px;border-radius:var(--pill);background:rgba(210,210,215,.64);color:#1d1d1f}
.case h3{font-size:17px}
.case .meta{font-size:12px;color:var(--ink-48)}
.case .row{display:flex;justify-content:flex-end;margin-top:auto}

.rules{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:48px;text-align:left}
@media (max-width:760px){.rules{grid-template-columns:1fr}}
.rule{background:var(--parchment);border-radius:var(--r-lg);padding:28px}
.rule .k{font-weight:600;font-size:36px;line-height:1;letter-spacing:-.02em}
.rule h3{font-size:19px;margin:12px 0 6px}

.page-head{padding-block:48px 24px}
.page-head h1{font-size:clamp(32px,5vw,44px);letter-spacing:-.015em;line-height:1.1}
.stack{display:grid;gap:20px;padding-bottom:80px}
.card{background:var(--canvas);border-radius:var(--r-lg);padding:28px;min-width:0}
.card > h2{font-size:24px;line-height:1.2}
.card > .step{font-size:14px;font-weight:600;color:var(--blue);margin-bottom:6px}
.subsec{border-top:1px solid var(--hair);padding-top:24px;margin-top:10px}
.subsec h3{font-size:19px}
.subsec .hint{color:var(--ink-48);font-size:14px;margin-top:4px}
.card > .hint{color:var(--ink-48);font-size:14px;margin-top:4px}
.card .body{margin-top:18px;display:grid;gap:14px}
.field{font-size:14px;font-weight:600;color:var(--ink-80);margin-bottom:-6px}
textarea,input[type=text],input[type=email],input[type=password],select{width:100%;font:inherit;color:var(--ink);background:var(--canvas);border:1px solid var(--hair);border-radius:12px;padding:12px 16px}
textarea{min-height:110px;resize:vertical}
textarea::placeholder,input::placeholder{color:var(--ink-48)}
input.pill{border-radius:var(--pill)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{border:1px solid var(--hair);background:var(--canvas);border-radius:var(--pill);padding:7px 14px;font-size:14px}
.chip[aria-pressed="true"]{border:2px solid var(--blue-focus);padding:6px 13px;color:var(--blue)}
.drop{border:1.5px dashed var(--hair);border-radius:var(--r-lg);padding:32px 20px;text-align:center;background:var(--parchment);cursor:pointer;display:block}
.drop.over{border-color:var(--blue)}
.drop .ic{font-weight:300;font-size:40px;line-height:1;color:var(--blue)}
.drop p{margin-top:8px}
.linkrow{display:flex;gap:10px}
.linkrow input{flex:1;min-width:0}
.files{display:grid;border-top:1px solid var(--hair)}
.files:empty{display:none}
.file{display:grid;grid-template-columns:44px minmax(0,1fr) auto;gap:14px;align-items:center;padding:12px 0;border-bottom:1px solid var(--hair)}
.thumb{width:44px;height:44px;border-radius:var(--r-sm);background:var(--parchment);display:grid;place-items:center;font-size:11px;color:var(--ink-48);font-weight:600;text-transform:uppercase}
.file .name{font-size:15px;overflow-wrap:anywhere}
.file .why{font-size:12px;color:var(--ink-48)}
.file .why.bad{color:var(--bad)}
.prog{height:3px;border-radius:2px;background:var(--hair);margin-top:6px;overflow:hidden}
.prog i{display:block;height:100%;background:var(--blue);width:0}
.kind{border-radius:var(--pill);padding:5px 12px;font-size:13px;border:1px solid var(--hair);background:var(--pearl);white-space:nowrap}
.kind::after{content:" ⌄";color:var(--ink-48)}
.kind[data-k="对标"]{color:var(--blue);border-color:var(--blue)}
.learn{grid-column:2 / -1;display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:13px;color:var(--ink-48)}
.learn .chip{padding:4px 11px;font-size:13px}
.learn .chip[aria-pressed="true"]{padding:3px 10px}
.x{border:0;background:none;color:var(--ink-48);font-size:13px;padding:4px}
.privacy{font-size:13px;color:var(--ink-48);line-height:1.5}
.privacy b{color:var(--ink-80);font-weight:600}
.err{color:var(--bad);font-size:14px}
.bar-actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center}

.brief{background:var(--parchment);border-radius:14px;padding:20px;white-space:pre-wrap;font-size:15px;line-height:1.6}
.ask{background:var(--warn-bg);border-radius:12px;padding:14px 16px;font-size:15px;white-space:pre-wrap}
.ask b{color:var(--warn)}

.olist-head{display:flex;justify-content:space-between;align-items:flex-end;gap:12px;flex-wrap:wrap;padding-block:44px 8px}
.olist-head h1{font-size:clamp(30px,4.4vw,40px);letter-spacing:-.015em;line-height:1.1}
.olist-head p{margin-top:8px}
.ogroup{font-size:13px;font-weight:600;color:var(--ink-48);margin:22px 0 8px}
.olist{display:grid;gap:10px}
.orow{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:16px;align-items:center;background:var(--canvas);border-radius:14px;padding:16px 20px;color:var(--ink);text-decoration:none!important;border:1px solid transparent}
.orow:hover{border-color:var(--hair)}
.orow .t{font-weight:600;font-size:16px}
.orow .m{font-size:12px;color:var(--ink-48);font-variant-numeric:tabular-nums}
@media (max-width:480px){.orow{grid-template-columns:1fr}.orow .badge{justify-self:start}}
.badge{font-size:12px;font-weight:600;border-radius:var(--pill);padding:4px 10px;white-space:nowrap;background:var(--parchment);color:var(--ink-80)}
.badge.act{background:var(--blue);color:var(--on-blue)}
.badge.warn{background:var(--warn-bg);color:var(--warn)}
.badge.ok{color:var(--ok)}
.empty{background:var(--canvas);border-radius:14px;padding:28px;text-align:center;color:var(--ink-48)}

.order-top{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap}
.oid{font-size:14px;color:var(--ink-48);font-variant-numeric:tabular-nums}
.quota{font-size:13px;color:var(--ink-48)}
.quota b{color:var(--ink)}
.track{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;margin-top:24px}
.track .st{display:grid;gap:8px;font-size:13px;color:var(--ink-48)}
.track .st i{display:block;height:4px;border-radius:2px;background:var(--hair)}
.track .st.done i{background:var(--blue)}
.track .st.done{color:var(--ink-80)}
.track .st.now{color:var(--ink);font-weight:600}
.track .st.now i{background:linear-gradient(90deg,var(--blue) 50%,var(--hair) 50%)}
@media (max-width:520px){.track .st{font-size:11px}}
.split{display:grid;grid-template-columns:minmax(0,340px) minmax(0,1fr);gap:20px;align-items:start}
@media (max-width:760px){.split{grid-template-columns:1fr}}
.player{background:var(--tile);border-radius:var(--r-lg);padding:14px;display:grid;gap:12px;color:#fff}
.player video{width:100%;max-height:70vh;border-radius:10px;background:#000;display:block}
.player .none{min-height:140px;border-radius:10px;background:#141416;display:grid;place-items:center;color:var(--on-tile-muted);font-size:14px;text-align:center;padding:20px}
.player .hint2{font-size:12px;color:var(--on-tile-muted);text-align:center}
.vers{display:flex;gap:6px;flex-wrap:wrap}
.ver{flex:1;border:0;border-radius:var(--pill);padding:6px 10px;font-size:12px;background:rgba(255,255,255,.1);color:var(--on-tile-muted)}
.ver.on{background:#fff;color:#1d1d1f;font-weight:600}
.thread{display:grid}
.msg{display:grid;grid-template-columns:4.6em minmax(0,1fr);gap:12px;padding:12px 0;border-bottom:1px solid var(--hair);font-size:15px}
.msg:last-child{border-bottom:0}
.msg time{font-size:12px;color:var(--ink-48);font-variant-numeric:tabular-nums;padding-top:3px}
.msg .who{font-size:12px;font-weight:600;color:var(--ink-48)}
.msg.us .who{color:var(--blue)}
.msg .txt{white-space:pre-wrap;overflow-wrap:anywhere}
.msg.round .bubble{background:var(--parchment);border-radius:10px;padding:10px 12px}
.ts{display:inline-block;font-size:12px;font-weight:600;color:var(--blue);background:var(--parchment);border-radius:6px;padding:1px 6px;margin-right:6px;font-variant-numeric:tabular-nums}
.pending{list-style:none;margin:0;padding:0;display:grid;gap:6px;font-size:15px}
.pending li{background:var(--parchment);border-radius:10px;padding:8px 12px;display:flex;gap:6px;align-items:baseline}
.pending li span.txt{flex:1;overflow-wrap:anywhere}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.confirm{background:var(--warn-bg);border-radius:12px;padding:14px 16px;font-size:14px;display:grid;gap:10px}
.dl{display:grid;gap:8px}

/* admin */
.adm-list{display:grid;gap:8px}
.adm-row{display:grid;grid-template-columns:9em minmax(0,1fr) 7em 7em;gap:12px;align-items:center;background:var(--canvas);border-radius:12px;padding:12px 16px;font-size:14px;color:var(--ink);text-decoration:none!important}
.adm-row:hover{outline:1px solid var(--hair)}
@media (max-width:640px){.adm-row{grid-template-columns:1fr 1fr}}
.kv{display:grid;grid-template-columns:6em minmax(0,1fr);gap:6px 14px;font-size:14px}
.kv dt{color:var(--ink-48)}
.kv dd{margin:0;overflow-wrap:anywhere}
.cmd{background:var(--tile);color:#f5f5f7;border-radius:12px;padding:16px;font:13px/1.6 ui-monospace,SFMono-Regular,Menlo,monospace;white-space:pre-wrap;overflow-wrap:anywhere}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media (max-width:640px){.grid2{grid-template-columns:1fr}}

.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);background:var(--ink);color:var(--canvas);padding:10px 18px;border-radius:var(--pill);font-size:14px;z-index:40;max-width:90vw}
footer{background:var(--parchment);padding-block:28px;font-size:12px;color:var(--ink-48)}
footer .wrap{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}