/* 镜语 — AI 长视频提示词工作台 */
:root{
  --bg:#0c0b0a;
  --bg-1:#111010;
  --panel:#161413;
  --panel-2:#1c1917;
  --line:#2b2622;
  --line-2:#3a332d;
  --text:#ece7e0;
  --muted:#9b9089;
  --muted-2:#6f665f;
  --accent:#c8873f;
  --accent-2:#e3b978;
  --accent-dim:rgba(200,135,63,.14);
  --ok:#6f9c74;
  --warn:#c06a4a;
  --radius:14px;
  --serif:"Noto Serif SC","Songti SC","Source Han Serif SC",Georgia,"SimSun",serif;
  --sans:"Inter","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --mono:"JetBrains Mono","SFMono-Regular",Consolas,"Courier New",monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--sans);font-size:15px;line-height:1.75;
  -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(1100px 620px at 78% -12%,rgba(200,135,63,.10),transparent 62%),
    radial-gradient(760px 460px at 6% 8%,rgba(120,90,60,.07),transparent 60%);
  background-attachment:fixed;
}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.3;letter-spacing:.01em;margin:0}
p{margin:0}
a{color:inherit;text-decoration:none}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,textarea,select{font-family:inherit;font-size:14px;color:var(--text);background:var(--bg-1);border:1px solid var(--line);border-radius:9px;padding:9px 11px;width:100%;outline:none;transition:border-color .18s,box-shadow .18s}
input:focus,textarea:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(200,135,63,.12)}
textarea{resize:vertical;line-height:1.7}
::selection{background:rgba(200,135,63,.3)}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.wrap-narrow{max-width:800px;margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono);font-size:13px;line-height:1.85;font-variant-ligatures:none}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:60;backdrop-filter:blur(14px);background:rgba(12,11,10,.78);border-bottom:1px solid rgba(43,38,34,.85)}
.nav-in{display:flex;align-items:center;gap:28px;height:62px}
.logo{display:flex;align-items:center;gap:9px;font-family:var(--serif);font-size:19px;letter-spacing:.14em}
.logo-mark{width:22px;height:22px;border:1px solid var(--accent);border-radius:50%;position:relative;display:grid;place-items:center}
.logo-mark::after{content:"";width:5px;height:5px;background:var(--accent);border-radius:50%}
.logo small{font-family:var(--sans);font-size:10px;letter-spacing:.22em;color:var(--muted-2);margin-left:2px}
.nav-links{display:flex;gap:24px;margin-left:auto;font-size:14px;color:var(--muted)}
.nav-links a:hover{color:var(--text)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;border-radius:999px;font-size:14px;font-weight:500;transition:transform .16s,background .18s,border-color .18s,color .18s;white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn-primary{background:linear-gradient(180deg,var(--accent-2),var(--accent));color:#221708;font-weight:600;box-shadow:0 6px 22px -10px rgba(200,135,63,.85)}
.btn-primary:hover{filter:brightness(1.07)}
.btn-ghost{border:1px solid var(--line-2);color:var(--text)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent-2)}
.btn-sm{padding:7px 15px;font-size:13px}
.btn-block{width:100%}
.tag{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);border:1px solid rgba(200,135,63,.32);background:var(--accent-dim);padding:4px 11px;border-radius:999px}

/* ---------- hero ---------- */
.hero{padding:88px 0 72px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center}
.hero h1{font-size:clamp(30px,3.6vw,47px);line-height:1.24;margin:22px 0 20px}
.hero h1 em{font-style:normal;color:var(--accent-2);position:relative}
.hero h1 em::after{content:"";position:absolute;left:0;right:0;bottom:2px;height:1px;background:linear-gradient(90deg,rgba(200,135,63,.7),transparent)}
.hero-sub{color:var(--muted);font-size:16px;max-width:520px}
.hero-cta{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap;align-items:center}
.hero-note{font-size:12.5px;color:var(--muted-2);margin-top:14px}
.hero-visual{position:relative}
.prompt-card{background:linear-gradient(180deg,var(--panel-2),var(--panel));border:1px solid var(--line);border-radius:18px;padding:0;overflow:hidden;box-shadow:0 40px 90px -50px #000,0 0 0 1px rgba(255,255,255,.02) inset}
.prompt-head{display:flex;align-items:center;gap:8px;padding:12px 16px;border-bottom:1px solid var(--line);background:rgba(0,0,0,.28);font-size:12px;color:var(--muted-2);letter-spacing:.06em}
.dot{width:7px;height:7px;border-radius:50%;background:var(--line-2)}
.dot.a{background:#5f4030}.dot.b{background:#4b4a32}.dot.c{background:#31453a}
.prompt-body{padding:18px 20px 22px;max-height:430px;overflow:hidden;position:relative}
.prompt-body::after{content:"";position:absolute;left:0;right:0;bottom:0;height:110px;background:linear-gradient(180deg,transparent,var(--panel))}
.prompt-body .mono{color:#c8beb4;white-space:pre-wrap}
.pk{color:var(--accent-2)}
.pd{color:#8fa98d}

/* ---------- sections ---------- */
section{padding:74px 0}
.sec-head{max-width:660px;margin-bottom:44px}
.sec-head h2{font-size:clamp(23px,2.7vw,32px);margin:16px 0 14px}
.sec-head p{color:var(--muted);font-size:15.5px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;transition:border-color .2s,transform .2s}
.card:hover{border-color:var(--line-2);transform:translateY(-2px)}
.card h3{font-size:17px;margin-bottom:10px}
.card p{color:var(--muted);font-size:14px}
.step-no{font-family:var(--serif);font-size:13px;color:var(--accent);letter-spacing:.2em;margin-bottom:14px;display:block}
.card .chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:16px}
.chip{font-size:11.5px;color:var(--muted);border:1px solid var(--line);border-radius:6px;padding:2px 8px;background:rgba(255,255,255,.02)}

/* anatomy */
.anatomy{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--panel)}
.anatomy-code{padding:26px;border-right:1px solid var(--line);background:rgba(0,0,0,.24)}
.anatomy-code .mono{color:#bdb3a9;white-space:pre-wrap;font-size:12.5px;line-height:1.95}
.anatomy-list{display:flex;flex-direction:column}
.anatomy-item{padding:15px 22px;border-bottom:1px solid var(--line);display:grid;grid-template-columns:32px 1fr;gap:12px}
.anatomy-item:last-child{border-bottom:0}
.anatomy-item i{font-family:var(--mono);font-style:normal;font-size:11px;color:var(--accent);padding-top:3px}
.anatomy-item b{display:block;font-size:14px;font-weight:600;margin-bottom:2px}
.anatomy-item span{font-size:12.5px;color:var(--muted);line-height:1.6}

/* template cards */
.tpl-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;display:flex;flex-direction:column;gap:10px;position:relative;overflow:hidden}
.tpl-card .tpl-tag{font-size:11px;letter-spacing:.14em;color:var(--muted-2);text-transform:uppercase}
.tpl-card h3{font-size:16px}
.tpl-card p{font-size:13px;color:var(--muted);flex:1}
.tpl-card .lock{position:absolute;top:14px;right:14px;font-size:11px;color:var(--warn);border:1px solid rgba(192,106,74,.35);border-radius:5px;padding:1px 7px;background:rgba(192,106,74,.1)}

/* pricing */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;align-items:stretch}
.price{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:28px 24px;display:flex;flex-direction:column;gap:6px;position:relative}
.price.feat{border-color:rgba(200,135,63,.5);background:linear-gradient(180deg,rgba(200,135,63,.07),var(--panel) 55%)}
.price .badge{position:absolute;top:-11px;left:24px;font-size:11px;letter-spacing:.14em;background:var(--accent);color:#221708;padding:3px 10px;border-radius:999px;font-weight:700}
.price h3{font-size:15px;color:var(--muted);font-family:var(--sans);font-weight:500;letter-spacing:.04em}
.price .amt{font-family:var(--serif);font-size:36px;line-height:1.1;margin:6px 0 2px}
.price .amt small{font-size:14px;color:var(--muted);font-family:var(--sans);margin-left:4px}
.price ul{list-style:none;padding:0;margin:16px 0 22px;display:flex;flex-direction:column;gap:9px;font-size:13.5px;color:var(--muted);flex:1}
.price li{display:flex;gap:9px;align-items:flex-start}
.price li::before{content:"—";color:var(--accent);flex:0 0 auto}

/* faq */
.faq-item{border-bottom:1px solid var(--line);padding:20px 0}
.faq-item h4{font-size:15.5px;font-family:var(--sans);font-weight:600;margin-bottom:8px}
.faq-item p{font-size:14px;color:var(--muted)}

/* footer */
footer{border-top:1px solid var(--line);padding:40px 0;color:var(--muted-2);font-size:13px}
.foot-in{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:center}

/* ---------- app ---------- */
.app-shell{display:grid;grid-template-columns:minmax(360px,430px) 1fr;min-height:calc(100vh - 62px)}
.form-col{border-right:1px solid var(--line);padding:26px 22px 120px;overflow-y:auto;max-height:calc(100vh - 62px);background:rgba(0,0,0,.16)}
.preview-col{padding:26px 26px 120px;overflow-y:auto;max-height:calc(100vh - 62px);position:relative}
.fgroup{margin-bottom:22px}
.fgroup-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.fgroup-head h4{font-size:13px;letter-spacing:.12em;color:var(--muted);font-family:var(--sans);font-weight:600;text-transform:uppercase}
.frow{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:10px}
.frow-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px;margin-bottom:10px}
label.fl{display:block;font-size:11.5px;color:var(--muted-2);margin-bottom:5px;letter-spacing:.04em}
.shot{border:1px solid var(--line);border-radius:12px;margin-bottom:12px;background:var(--panel);overflow:hidden}
.shot-head{display:flex;align-items:center;gap:10px;padding:10px 13px;background:rgba(0,0,0,.3);border-bottom:1px solid var(--line)}
.shot-head b{font-size:12.5px;letter-spacing:.1em;color:var(--accent-2);font-weight:600}
.shot-head .acts{margin-left:auto;display:flex;gap:4px}
.icon-btn{width:24px;height:24px;border-radius:6px;display:grid;place-items:center;color:var(--muted);font-size:12px;border:1px solid transparent}
.icon-btn:hover{color:var(--text);border-color:var(--line-2);background:rgba(255,255,255,.03)}
.shot-body{padding:13px}
.shot-body textarea{min-height:58px}
.ta-xs{min-height:44px !important}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:18px;position:sticky;top:0;background:linear-gradient(180deg,var(--bg) 70%,transparent);z-index:5;padding-top:2px}
.tab{padding:8px 15px;font-size:13.5px;color:var(--muted);border-bottom:1.5px solid transparent;margin-bottom:-1px}
.tab.on{color:var(--accent-2);border-bottom-color:var(--accent)}
.tab:hover{color:var(--text)}
.outbox{background:rgba(0,0,0,.3);border:1px solid var(--line);border-radius:12px;padding:18px 20px;position:relative;min-height:200px}.outbox pre{margin:0;white-space:pre-wrap;word-break:break-word;font-family:var(--mono);font-size:12.5px;line-height:1.95;color:#c8beb4}
.out-tools{display:flex;gap:8px;justify-content:flex-end;margin-bottom:10px;flex-wrap:wrap}
.locked{filter:blur(6px);user-select:none;pointer-events:none;max-height:340px;overflow:hidden}
.paywall{position:absolute;inset:auto 0 0 0;padding:26px;background:linear-gradient(180deg,transparent,rgba(12,11,10,.94) 34%)}
.paywall-box{background:var(--panel-2);border:1px solid rgba(200,135,63,.35);border-radius:14px;padding:20px 22px;text-align:center}
.paywall-box h4{font-family:var(--serif);font-size:17px;margin-bottom:6px}
.paywall-box p{font-size:13px;color:var(--muted);margin-bottom:14px}
.bar{display:flex;gap:8px}
.pill{font-size:11.5px;color:var(--muted);border:1px solid var(--line);background:var(--panel);border-radius:999px;padding:3px 11px}
.pill.ok{color:var(--ok);border-color:rgba(111,156,116,.4)}
.pill.warn{color:var(--warn);border-color:rgba(192,106,74,.4)}
.topbar{display:flex;align-items:center;gap:10px;padding:10px 0 16px;flex-wrap:wrap}

/* 组条 */
.group-bar-wrap{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 14px 12px;margin-bottom:22px}
.group-bar{display:flex;gap:7px;flex-wrap:wrap}
.gchip{display:flex;flex-direction:column;align-items:flex-start;gap:1px;padding:6px 12px;border:1px solid var(--line-2);border-radius:9px;font-size:12.5px;color:var(--muted);background:rgba(255,255,255,.015);transition:.16s}
.gchip em{font-style:normal;font-size:10.5px;color:var(--muted-2);letter-spacing:.03em}
.gchip:hover{border-color:var(--accent);color:var(--text)}
.gchip.on{border-color:var(--accent);background:var(--accent-dim);color:var(--accent-2)}
.gchip.on em{color:rgba(227,185,120,.75)}
.gchip.add{padding:6px 11px;font-size:12px;justify-content:center;color:var(--muted-2)}
.gchip.add:hover{color:var(--accent-2)}

/* modal */
.modal-mask{position:fixed;inset:0;background:rgba(6,5,4,.78);backdrop-filter:blur(6px);z-index:200;display:none;place-items:center;padding:24px}
.modal-mask.on{display:grid}
.modal{background:var(--panel);border:1px solid var(--line-2);border-radius:16px;max-width:440px;width:100%;padding:28px;box-shadow:0 40px 100px -40px #000}
.modal h3{font-size:20px;margin-bottom:8px}
.modal p{font-size:13.5px;color:var(--muted);margin-bottom:18px}
.modal .bar{justify-content:flex-end;margin-top:16px}
.hint{font-size:12px;color:var(--muted-2);margin-top:8px;line-height:1.6}
.err{color:var(--warn);font-size:12.5px;margin-top:8px;min-height:18px}
.toast{position:fixed;left:50%;bottom:38px;transform:translate(-50%,20px);background:var(--panel-2);border:1px solid var(--line-2);color:var(--text);padding:10px 20px;border-radius:999px;font-size:13.5px;opacity:0;pointer-events:none;transition:.24s;z-index:300;box-shadow:0 20px 50px -20px #000}
.toast.on{opacity:1;transform:translate(-50%,0)}

@media (max-width:980px){
  .hero-grid,.grid-3,.grid-2,.price-grid,.anatomy{grid-template-columns:1fr}
  .anatomy-code{border-right:0;border-bottom:1px solid var(--line)}
  .app-shell{grid-template-columns:1fr}
  .form-col,.preview-col{max-height:none;border-right:0}
  .nav-links{display:none}
  .hero{padding:52px 0 40px}
  section{padding:52px 0}
}