:root{
  --bun:#e9a23b; --bun-d:#b86f12; --ketchup:#c8372d; --lettuce:#5c8a3a; --cheese:#f2c230;
  --patty:#5a3422; --cream:#fff8ec; --paper:#fffdf8; --ink:#2b1d14; --muted:#6b5a4c;
  --line:#e6d8c3; --focus:#1b5fd1; --r:14px;
  --green:#1f4d3a; --green-d:#16382a; --navy:#1d2b44;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  --display:"Rockwell","Hoefler Text","Songti SC","STSong","Noto Serif CJK SC","Source Han Serif SC",Georgia,serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"PingFang SC","Microsoft YaHei",monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:70px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--cream);line-height:1.7;font-size:16px}
.wrap{width:min(1120px,100% - 40px);margin:0 auto}
h1,h2,h3{line-height:1.3;margin:0}
h2{font-size:clamp(24px,3.4vw,32px);margin-bottom:8px}
p{margin:0}
a{color:inherit}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.skip{position:absolute;left:-999px;top:8px;background:#fff;padding:8px 14px;border-radius:8px;z-index:100}
.skip:focus{left:8px}

.top{position:sticky;top:0;z-index:20;background:rgba(255,248,236,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top-in{display:flex;align-items:center;justify-content:space-between;min-height:58px;gap:12px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:600;letter-spacing:.04em}
.brand b{color:var(--ketchup)}
.brand-mark{display:grid;place-items:center;width:32px;height:32px;border-radius:10px 10px 6px 6px;background:var(--bun);color:var(--patty);font-weight:800}
.top nav{display:flex;gap:4px;align-items:center}
.top nav a{text-decoration:none;padding:8px 12px;border-radius:999px;font-size:15px}
.top nav a:hover{background:#f3e5cc}
.top nav .nav-cta{background:var(--ink);color:#fff}
.top nav .nav-cta:hover{background:var(--patty)}

.hero{padding:56px 0 48px;background:radial-gradient(circle at 85% 20%,#ffe3a6 0,transparent 45%),var(--cream)}
.hero-in{display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center}
.eyebrow{color:var(--ketchup);font-weight:700;letter-spacing:.14em;font-size:14px;margin-bottom:12px}
h1{font-size:clamp(30px,5vw,48px);letter-spacing:.01em}
.lead{margin-top:18px;font-size:18px;color:var(--muted);max-width:36em}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.fine{margin-top:14px;font-size:14px;color:var(--muted);max-width:40em}

.burger{width:min(280px,70%);margin:0 auto;display:flex;flex-direction:column;gap:5px;filter:drop-shadow(0 18px 18px rgba(90,52,34,.18))}
.b-layer{height:34px}
.b-bun-top{height:78px;background:linear-gradient(#f0b34f,var(--bun-d));border-radius:140px 140px 18px 18px}
.b-sauce{background:var(--ketchup);border-radius:6px 30px 10px 30px;height:16px}
.b-lettuce{background:var(--lettuce);height:20px;border-radius:30px 8px 30px 8px}
.b-patty{background:var(--patty);height:40px;border-radius:14px}
.b-cheese{background:var(--cheese);height:16px;clip-path:polygon(0 0,100% 0,92% 100%,70% 50%,48% 100%,26% 50%,8% 100%)}
.b-bun-bot{height:34px;background:linear-gradient(var(--bun),var(--bun-d));border-radius:10px 10px 26px 26px}

.btn{font:inherit;font-weight:600;cursor:pointer;border:2px solid var(--ink);background:#fff;color:var(--ink);padding:11px 20px;border-radius:999px;text-decoration:none;display:inline-block;line-height:1.4;transition:background .15s,transform .1s}
.btn:hover{background:#f6e8d0}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--ketchup);border-color:var(--ketchup);color:#fff}
.btn.primary:hover{background:#a82a21;border-color:#a82a21}
.btn.ghost{background:transparent}
.btn.small{padding:7px 16px;font-size:15px}

.sec{padding:60px 0}
.sec.alt{background:#fbefd9}
.sec-lead{color:var(--muted);margin-bottom:28px}

.steps{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.steps li{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:18px 16px;position:relative}
.steps .num{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--bun);color:var(--patty);font-weight:800;margin-bottom:10px}
.steps h3{font-size:18px;margin-bottom:6px}
.steps p{font-size:15px;color:var(--muted)}

.layers{display:grid;gap:6px;max-width:640px}
.layer{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 20px;color:#fff;border-radius:12px}
.layer span{font-size:15px;opacity:.95}
.layer b{font-size:17px}
.l1{background:#b86f12;width:70%}.l2{background:#c8372d;width:78%}.l3{background:#5c8a3a;width:86%}
.l4{background:#5a3422;width:94%}.l5{background:#8a6d1a;width:100%}.l6{background:#b86f12;width:100%}
.skill-note{margin-top:24px;max-width:640px;background:var(--paper);border:1px dashed var(--bun-d);border-radius:var(--r);padding:12px 18px}
.skill-note summary{cursor:pointer;font-weight:600}
.skill-note p{margin-top:10px;color:var(--muted);font-size:15px}
.skill-note ul{margin:10px 0 0;padding-left:0;list-style:none;display:grid;gap:4px}
.skill-note li b{display:inline-block;width:1.6em;color:var(--ketchup)}

.sides{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.side{background:var(--paper);border:1px solid var(--line);border-top:5px solid var(--bun);border-radius:var(--r);padding:16px}
.side:nth-child(2){border-top-color:var(--cheese)}
.side:nth-child(3){border-top-color:var(--patty)}
.side:nth-child(4){border-top-color:var(--ketchup)}
.side:nth-child(5){border-top-color:var(--lettuce)}
.side b{font-size:18px;display:block}
.side em{font-style:normal;color:var(--ketchup);font-size:14px;font-weight:600}
.side p{margin-top:8px;font-size:15px;color:var(--muted)}

.bench-sec{background:linear-gradient(#fff8ec,#fdf0d8)}
.bench-tools{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:18px}
.sample-tag{background:#fff3c4;border:1px solid var(--cheese);border-radius:999px;padding:3px 12px;font-size:14px}
.bench{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}
.form{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.field{margin-bottom:16px}
.field label{display:flex;align-items:center;gap:8px;font-weight:700;margin-bottom:6px}
.idx{display:inline-grid;place-items:center;width:24px;height:24px;border-radius:50%;background:var(--ink);color:#fff;font-size:13px}
textarea{width:100%;font:inherit;font-size:16px;color:var(--ink);background:#fff;border:1.5px solid var(--line);border-radius:10px;padding:10px 12px;resize:vertical;line-height:1.6}
textarea:focus{border-color:var(--focus)}
.sides-pick{border:1.5px solid var(--line);border-radius:12px;padding:10px 14px 6px;margin:0}
.sides-pick legend{font-weight:700;padding:0 6px}
.chk{display:flex;align-items:center;gap:10px;padding:7px 2px;cursor:pointer}
.chk input{width:20px;height:20px;accent-color:var(--ketchup);flex:none}

.out{position:sticky;top:76px;background:#fff;border:2px solid var(--ink);border-radius:var(--r);padding:18px}
.out-head{display:flex;justify-content:space-between;align-items:baseline;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.out h3{font-size:18px}
.status{font-size:14px;color:var(--muted)}
.preview{margin:0;white-space:pre-wrap;word-break:break-word;overflow-wrap:anywhere;font-family:var(--mono);font-size:14px;line-height:1.7;background:#fbf5ea;border:1px solid var(--line);border-radius:10px;padding:14px;max-height:60vh;overflow:auto}
.out-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:14px}
.manual{margin-top:14px}
.manual label{display:block;font-size:14px;margin-bottom:6px}
.out .fine{margin-top:12px}

.notes{display:grid;grid-template-columns:1.3fr 1fr;gap:40px}
.notes h2{margin-bottom:12px}
.plain{margin:0;padding-left:1.2em;display:grid;gap:6px}
.foot{padding:26px 0;background:var(--patty);color:#f5e6d0;font-size:14px;text-align:center}

/* ===== 美式餐厅风格 ===== */
h1,h2,h3,.brand,.btn{font-family:var(--display)}
h1{font-weight:900;letter-spacing:.02em;color:var(--green);text-shadow:3px 3px 0 var(--cheese)}
h2{font-weight:900;color:var(--green);display:inline-block;border-bottom:5px solid var(--ketchup);padding-bottom:2px}
.top{background:var(--green);border-bottom:4px solid var(--ketchup)}
.top .brand{color:#fff8ec}
.top .brand b{color:var(--cheese)}
.top nav a{color:#fff8ec}
.top nav a:hover{background:rgba(255,255,255,.14)}
.top nav .nav-cta{background:var(--ketchup);color:#fff;border:2px solid #fff8ec}
.top nav .nav-cta:hover{background:#a82a21}
.hero{background:
  repeating-linear-gradient(90deg,rgba(200,55,45,.07) 0 28px,transparent 28px 56px),
  radial-gradient(circle at 85% 20%,#ffe3a6 0,transparent 45%),var(--cream);
  border-bottom:4px double var(--green)}
.eyebrow{display:inline-block;background:var(--ketchup);color:#fff;padding:4px 14px;border-radius:4px;transform:rotate(-1.5deg);letter-spacing:.1em}
.btn{border-width:3px;border-radius:10px;box-shadow:4px 4px 0 var(--ink);text-transform:none}
.btn:hover{transform:translate(-1px,-1px);box-shadow:5px 5px 0 var(--ink)}
.btn:active{transform:translate(3px,3px);box-shadow:1px 1px 0 var(--ink)}
.btn:disabled{opacity:.55;cursor:not-allowed;box-shadow:none;transform:none}
.btn.primary{border-color:var(--ink)}
.btn.primary:hover{border-color:var(--ink)}
.btn.big{width:100%;font-size:19px;padding:14px 20px;margin-top:14px}
.steps li,.side,.form,.skill-note{border:2px solid var(--ink);box-shadow:4px 4px 0 rgba(43,29,20,.85)}
.sec.alt{background:#f7e6c4;border-top:3px solid var(--ink);border-bottom:3px solid var(--ink)}
.bench-sec{background:var(--cream)}
.layer{border:2px solid var(--ink);box-shadow:3px 3px 0 var(--ink)}
textarea,select,input[type=password]{border:2px solid var(--ink);border-radius:8px}
select,input[type=password]{width:100%;font:inherit;font-size:16px;color:var(--ink);background:#fff;padding:10px 12px;min-height:44px}
select:focus,input[type=password]:focus{border-color:var(--focus)}
.subhead{font-family:var(--display);font-weight:900;color:var(--ketchup);margin:20px 0 10px;padding-top:14px;border-top:2px dashed var(--ink)}
.field-main textarea{background:#fffbea}
.idx{background:var(--green);border-radius:6px;width:auto;min-width:24px;padding:0 6px}
.out-col{display:grid;gap:20px;min-width:0}
.out{position:static;border-width:3px;box-shadow:5px 5px 0 var(--ink)}
.result{border-color:var(--green);box-shadow:5px 5px 0 var(--green)}
.result h3{color:var(--green)}
.empty{font-size:15px;color:var(--muted);border:2px dashed var(--line);border-radius:10px;padding:14px}
.result-text{background:#fffdf3;font-family:var(--font);font-size:16px;max-height:70vh}
.state{font-weight:700;padding:3px 12px;border-radius:999px;border:2px solid var(--ink);background:#fff}
.state[data-state=loading]{background:var(--cheese)}
.state[data-state=success]{background:#cfe8c3;color:var(--green-d)}
.state[data-state=error]{background:#ffd9d4;color:#8a1d15}
.state[data-state=loading]::before{content:"";display:inline-block;width:10px;height:10px;margin-right:8px;border:2px solid var(--ink);border-top-color:transparent;border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.gen-error{background:#ffe9e6;border:2px solid var(--ketchup);color:#7a1b14;border-radius:10px;padding:10px 14px;margin-bottom:10px;font-weight:600}
.gen-box{margin-top:20px;padding:16px;border:3px solid var(--green);border-radius:var(--r);background:#eef6ea}
.hint{font-size:14px;color:var(--muted);margin-top:8px}
.foot{background:var(--green);border-top:4px solid var(--ketchup)}
.film-section{background:#f7e6c4;border-top:3px solid var(--ink)}
.film-wrap{display:grid;grid-template-columns:1fr 1.5fr;gap:36px;align-items:center}
.film-wrap video{display:block;width:100%;height:auto;border:3px solid var(--ink);border-radius:14px;box-shadow:7px 7px 0 var(--ink);background:var(--green)}

@media (max-width:960px){
  .steps,.sides{grid-template-columns:repeat(2,1fr)}
  .bench{grid-template-columns:1fr}
  .out{position:static}
  .notes{grid-template-columns:1fr;gap:28px}
  .film-wrap{grid-template-columns:1fr}
}
@media (max-width:720px){
  .hero-in{grid-template-columns:1fr}
  .burger{width:180px;order:-1}
  .top nav a:not(.nav-cta){display:none}
  .layers .layer{width:100%!important}
}
@media (max-width:420px){
  .steps,.sides{grid-template-columns:1fr}
  .wrap{width:calc(100% - 28px)}
}