:root{
  --white:#ffffff;
  --mist:#faf9f7;
  --sand:#f4f2ec;
  --sand-2:#efece4;
  --line:#e8e4db;
  --line-2:#d9d3c6;
  --ink:#1a1a1a;
  --ink-2:#3c3b38;
  --muted:#7c7871;
  --muted-2:#a39e94;
  --accent:#9a7c49;
  --accent-2:#c3a878;
  --accent-3:#efe7d6;
  --graphite:#141516;
  --maxw:1220px;
  --ease:cubic-bezier(.22,.61,.36,1);
  color-scheme:light;
  font-size:16px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--white);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang TC","Helvetica Neue","Noto Sans TC",sans-serif;
  font-weight:400;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer}

.op-wrap{max-width:var(--maxw);margin:0 auto;padding:0 clamp(22px,5vw,48px)}

/* ---------- header ---------- */
.op-header{
  position:sticky;top:0;z-index:30;
  background:rgba(255,255,255,.86);
  backdrop-filter:saturate(160%) blur(18px);
  border-bottom:1px solid var(--line);
}
.op-header__inner{
  max-width:var(--maxw);margin:0 auto;padding:0 clamp(22px,5vw,48px);
  height:70px;display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.op-brand{display:flex;align-items:center;gap:12px;font-size:.95rem;letter-spacing:.02em;font-weight:600}
.op-mark{
  width:30px;height:30px;border-radius:50%;
  border:1px solid var(--line-2);
  display:grid;place-items:center;
  font-size:.8rem;color:var(--accent);letter-spacing:0;font-weight:600;
}
.op-brand small{display:block;font-size:.66rem;letter-spacing:.24em;color:var(--muted-2);font-weight:500;text-transform:uppercase}
.op-nav{display:flex;align-items:center;gap:30px}
.op-nav a{
  font-size:.74rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--ink-2);padding:4px 0;position:relative;
}
.op-nav a::after{
  content:"";position:absolute;left:0;right:100%;bottom:0;height:1px;
  background:var(--accent);transition:right .35s var(--ease);
}
.op-nav a:hover{color:var(--ink)}
.op-nav a:hover::after{right:0}
.op-nav .op-cta{
  border:1px solid var(--ink);padding:9px 18px;letter-spacing:.12em;
}
.op-nav .op-cta::after{display:none}
.op-nav .op-cta:hover{background:var(--ink);color:#fff}
.op-burger{display:none;background:none;border:1px solid var(--line-2);border-radius:2px;padding:7px 11px;color:var(--ink)}

/* ---------- generic section ---------- */
.op-section{padding:clamp(70px,8.5vw,124px) 0;border-top:1px solid var(--line)}
.op-section--flush{border-top:0}
.op-eyebrow{
  display:flex;align-items:center;gap:14px;
  font-size:.72rem;letter-spacing:.3em;text-transform:uppercase;
  color:var(--accent);font-weight:600;margin:0 0 22px;
}
.op-eyebrow::before{content:"";width:34px;height:1px;background:var(--accent-2)}
.op-title{
  font-size:clamp(1.7rem,3.4vw,2.9rem);
  line-height:1.32;letter-spacing:-.02em;font-weight:300;margin:0;max-width:20em;
}
.op-title strong{font-weight:600}
.op-lead{color:var(--muted);font-size:clamp(1rem,1.3vw,1.12rem);max-width:44em;margin:22px 0 0}
.op-hint{
  display:inline-flex;align-items:center;gap:13px;flex-wrap:wrap;
  margin:18px 0 0;padding:14px 22px;
  border:1px solid var(--accent-2);border-left:3px solid var(--accent);
  background:linear-gradient(90deg,#fdfaf3,#ffffff);
  color:var(--ink);font-size:.98rem;font-weight:600;letter-spacing:.01em;
  box-shadow:0 12px 34px rgba(154,124,73,.12);
}
.op-hint__mark{color:var(--accent);font-size:1.1rem;line-height:1}
.op-hint::after{
  content:"HOVER / CLICK";font-size:.6rem;font-weight:600;letter-spacing:.28em;
  color:var(--accent);border-left:1px solid var(--line-2);padding-left:15px;margin-left:2px;
  white-space:nowrap;
}
.op-head{max-width:780px;margin-bottom:clamp(40px,5vw,64px)}

/* ---------- hero ---------- */
.op-hero{border-bottom:1px solid var(--line);overflow:hidden}
.op-hero__grid{
  display:grid;grid-template-columns:minmax(0,1.02fr) minmax(0,.98fr);
  align-items:center;gap:clamp(32px,5vw,76px);
  max-width:var(--maxw);margin:0 auto;padding:clamp(56px,7vw,104px) clamp(22px,5vw,48px);
}
.op-hero__eyebrow{
  font-size:.72rem;letter-spacing:.32em;text-transform:uppercase;color:var(--accent);
  font-weight:600;margin:0 0 26px;
}
.op-hero h1{
  font-size:clamp(2.1rem,4.6vw,4rem);
  line-height:1.22;letter-spacing:-.025em;font-weight:300;margin:0;
}
.op-hero h1 strong{font-weight:600;color:var(--ink)}
.op-hero h1 em{
  font-style:normal;position:relative;white-space:nowrap;
}
.op-hero h1 em::after{
  content:"";position:absolute;left:0;right:0;bottom:.06em;height:.32em;
  background:var(--accent-3);z-index:-1;
}
.op-hero__lead{color:var(--muted);font-size:1.08rem;max-width:32em;margin:26px 0 0}
.op-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.op-btn{
  display:inline-flex;align-items:center;gap:10px;
  font-size:.78rem;letter-spacing:.13em;text-transform:uppercase;font-weight:600;
  padding:14px 26px;border:1px solid var(--ink);background:var(--ink);color:#fff;
  transition:background .3s var(--ease),color .3s var(--ease),border-color .3s var(--ease);
}
.op-btn:hover{background:transparent;color:var(--ink)}
.op-btn--ghost{background:transparent;color:var(--ink)}
.op-btn--ghost:hover{background:var(--ink);color:#fff}
.op-btn span{font-size:1rem;line-height:1}
.op-hero__media{position:relative}
.op-hero__media img{
  width:100%;height:clamp(360px,58vh,560px);object-fit:cover;
}
.op-hero__badge{
  position:absolute;left:0;bottom:0;background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);padding:16px 20px;border-top:1px solid var(--line-2);
  border-right:1px solid var(--line-2);
}
.op-hero__badge b{display:block;font-size:1.5rem;font-weight:600;letter-spacing:-.02em;color:var(--ink)}
.op-hero__badge span{font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--muted)}

/* ---------- stat strip ---------- */
.op-stats{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-bottom:1px solid var(--line);
}
.op-stat{
  padding:38px clamp(20px,3vw,40px);border-right:1px solid var(--line);
}
.op-stat:last-child{border-right:0}
.op-stat b{display:block;font-size:clamp(1.8rem,3vw,2.5rem);font-weight:300;letter-spacing:-.03em;line-height:1.1}
.op-stat b i{font-style:normal;font-size:.9rem;color:var(--muted-2);margin-left:4px;font-weight:400}
.op-stat span{display:block;margin-top:8px;font-size:.82rem;color:var(--muted);letter-spacing:.02em}

/* ---------- problem / solution ---------- */
.op-split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,4vw,64px);align-items:start}
.op-card{
  border:1px solid var(--line);background:var(--white);
  padding:clamp(28px,3.4vw,44px);
}
.op-card--sand{background:var(--sand);border-color:transparent}
.op-card h3{font-size:1.15rem;font-weight:600;letter-spacing:-.01em;margin:0 0 20px}
.op-card .op-label{font-size:.7rem;letter-spacing:.24em;text-transform:uppercase;color:var(--muted-2);display:block;margin-bottom:10px}
.op-list{list-style:none;margin:0;padding:0}
.op-list li{position:relative;padding:13px 0 13px 26px;border-top:1px solid var(--line);font-size:.96rem;color:var(--ink-2)}
.op-list li:first-child{border-top:0}
.op-list li::before{content:"";position:absolute;left:2px;top:22px;width:7px;height:7px;border-radius:50%;background:var(--accent-2)}
.op-card--sand .op-list li{border-color:var(--line-2)}

/* ---------- roles ---------- */
.op-roles{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.op-role{
  border:1px solid var(--line);padding:clamp(24px,2.4vw,34px);
  display:flex;flex-direction:column;gap:16px;
  transition:transform .4s var(--ease),border-color .4s var(--ease);
}
.op-role:hover{transform:translateY(-4px);border-color:var(--line-2)}
.op-role__tag{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border:1px solid var(--accent-2);color:var(--accent);
  font-size:1rem;font-weight:600;letter-spacing:0;
}
.op-role h3{margin:0;font-size:1.2rem;font-weight:600}
.op-role p{margin:0;font-size:.94rem;color:var(--muted)}
.op-role__points{list-style:none;margin:auto 0 0;padding:16px 0 0;border-top:1px solid var(--line);font-size:.86rem;color:var(--ink-2)}
.op-role__points li{padding:4px 0 4px 16px;position:relative}
.op-role__points li::before{content:"—";position:absolute;left:0;color:var(--accent-2)}

/* ---------- steps ---------- */
.op-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.op-step{background:var(--white);padding:clamp(26px,2.6vw,36px)}
.op-step b{display:block;font-size:1.6rem;font-weight:300;color:var(--accent);letter-spacing:-.02em}
.op-step h4{margin:12px 0 8px;font-size:1.02rem;font-weight:600}
.op-step p{margin:0;font-size:.9rem;color:var(--muted)}

/* ---------- flow list ---------- */
.op-flow{list-style:none;counter-reset:flow;margin:26px 0 0;padding:0}
.op-flow li{position:relative;padding:16px 0 16px 58px;border-top:1px solid var(--line);font-size:.96rem;color:var(--ink-2)}
.op-flow li:first-child{border-top:0}
.op-flow li::before{
  counter-increment:flow;content:"0" counter(flow);
  position:absolute;left:0;top:16px;font-size:1rem;font-weight:600;
  color:var(--accent);letter-spacing:.02em;
}
.op-flow li b{display:block;font-weight:600;color:var(--ink)}
.op-flow li span{display:block;color:var(--muted);font-size:.88rem;margin-top:2px}

/* ---------- feature (image + text) ---------- */
.op-feature{display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,5vw,72px);align-items:center}
.op-feature--rev .op-feature__media{order:2}
.op-feature__media img{width:100%;height:clamp(340px,52vh,500px);object-fit:cover}
.op-feature__body .op-eyebrow{margin-bottom:18px}
.op-feature__body h3{font-size:clamp(1.5rem,2.6vw,2.2rem);font-weight:300;letter-spacing:-.02em;line-height:1.34;margin:0}
.op-feature__body p{color:var(--muted);margin:20px 0 0}
.op-feature__metrics{display:flex;gap:34px;margin-top:30px;flex-wrap:wrap}
.op-feature__metrics div b{display:block;font-size:1.7rem;font-weight:300;color:var(--ink);letter-spacing:-.02em}
.op-feature__metrics div span{font-size:.78rem;color:var(--muted);letter-spacing:.06em}

/* ---------- entries ---------- */
.op-entries{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.op-entry{
  border:1px solid var(--line);padding:30px 28px;min-height:150px;
  display:flex;flex-direction:column;justify-content:space-between;
  transition:background .35s var(--ease),border-color .35s var(--ease);
}
.op-entry:hover{background:var(--sand);border-color:var(--line-2)}
.op-entry span{font-size:.7rem;letter-spacing:.22em;color:var(--muted-2)}
.op-entry b{font-size:1.22rem;font-weight:500;letter-spacing:.02em}
.op-entry i{font-style:normal;font-size:.84rem;color:var(--muted)}

/* ---------- revenue ---------- */
.op-revenue{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.op-rev{background:var(--white);padding:clamp(26px,2.6vw,36px);display:flex;flex-direction:column;gap:12px}
.op-rev span{font-size:.7rem;letter-spacing:.2em;color:var(--accent);font-weight:600}
.op-rev h4{margin:0;font-size:1.08rem;font-weight:600}
.op-rev p{margin:0;font-size:.88rem;color:var(--muted)}
.op-rev em{font-style:normal;margin-top:auto;padding-top:14px;border-top:1px solid var(--line);font-size:.76rem;letter-spacing:.08em;color:var(--muted-2)}

/* ---------- quote ---------- */
.op-quote{background:var(--graphite);color:#f2f0ea;border-top:0}
.op-quote .op-wrap{padding-top:clamp(64px,7vw,100px);padding-bottom:clamp(64px,7vw,100px)}
.op-quote blockquote{margin:0;font-size:clamp(1.4rem,3vw,2.4rem);font-weight:300;line-height:1.5;letter-spacing:-.02em;max-width:24em}
.op-quote blockquote b{font-weight:600;color:var(--accent-2)}
.op-quote .op-quote__by{margin-top:26px;font-size:.8rem;letter-spacing:.2em;text-transform:uppercase;color:#8f8a80}

/* ---------- cta ---------- */
.op-cta{background:var(--sand);border-top:1px solid var(--line)}
.op-cta .op-wrap{padding-top:clamp(64px,7vw,104px);padding-bottom:clamp(64px,7vw,104px);text-align:center}
.op-cta h2{font-size:clamp(1.7rem,3.4vw,2.8rem);font-weight:300;letter-spacing:-.02em;margin:0 auto;max-width:20em;line-height:1.34}
.op-cta p{color:var(--muted);max-width:40em;margin:20px auto 0}
.op-cta .op-actions{justify-content:center}

/* ---------- footer ---------- */
.op-foot{background:var(--white);border-top:1px solid var(--line);padding:44px 0}
.op-foot__inner{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:center;font-size:.82rem;color:var(--muted)}
.op-foot a:hover{color:var(--ink)}
.op-foot nav{display:flex;gap:22px;flex-wrap:wrap}
.op-note{font-size:.78rem;color:var(--muted-2);margin-top:18px;max-width:60em}

/* ---------- reveal ---------- */
.op-reveal{opacity:1;transform:none}
.op-anim .op-reveal{opacity:0;transform:translateY(22px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.op-anim .op-reveal.is-in{opacity:1;transform:none}

@media(max-width:1060px){
  .op-hero__grid{grid-template-columns:1fr;gap:40px}
  .op-hero__media img{height:clamp(300px,44vh,440px)}
  .op-roles{grid-template-columns:1fr 1fr}
  .op-steps{grid-template-columns:1fr 1fr}
  .op-revenue{grid-template-columns:1fr 1fr}
  .op-feature{grid-template-columns:1fr;gap:30px}
  .op-feature--rev .op-feature__media{order:0}
}
@media(max-width:760px){
  .op-header__inner{height:62px}
  .op-nav{position:fixed;inset:62px 0 auto 0;background:#fff;flex-direction:column;align-items:flex-start;gap:0;padding:10px 24px 22px;border-bottom:1px solid var(--line);transform:translateY(-130%);transition:transform .3s var(--ease);box-shadow:0 20px 40px rgba(20,21,22,.08)}
  .op-nav.is-open{transform:translateY(0)}
  .op-nav a{padding:14px 0;width:100%;border-bottom:1px solid var(--line);font-size:.82rem}
  .op-nav .op-cta{border:1px solid var(--ink);margin-top:12px;text-align:center;padding:12px 18px}
  .op-burger{display:block}
  .op-stats{grid-template-columns:1fr 1fr}
  .op-stat{border-bottom:1px solid var(--line)}
  .op-stat:nth-child(2n){border-right:0}
  .op-split{grid-template-columns:1fr}
  .op-roles{grid-template-columns:1fr}
  .op-steps,.op-entries,.op-revenue{grid-template-columns:1fr}
  .op-title{font-size:1.7rem}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .op-anim .op-reveal{opacity:1;transform:none;transition:none}
}
@media print{
  .op-header,.op-burger,.op-actions{display:none!important}
  .op-section{padding:26px 0;break-inside:avoid}
  .op-hero__grid{padding:20px 0}
  .op-anim .op-reveal{opacity:1!important;transform:none!important}
  body{font-size:11pt}
}

/* ---------- 入口流程彈窗 ---------- */
.op-entry{cursor:pointer}
.op-entry__more{font-style:normal;display:block;margin-top:12px;font-size:.72rem;letter-spacing:.1em;color:var(--accent);opacity:.7;transition:opacity .25s var(--ease)}
.op-entry:hover .op-entry__more,.op-entry:focus-visible .op-entry__more{opacity:1}
.op-entry:focus-visible{outline:2px solid var(--accent);outline-offset:3px}

.op-dialog{
  border:1px solid var(--line-2);padding:0;width:min(900px,93vw);max-height:88vh;
  background:var(--white);color:var(--ink);box-shadow:0 40px 100px rgba(20,21,22,.3);
}
.op-dialog::backdrop{background:rgba(20,21,22,.46);backdrop-filter:blur(2px)}
.op-dialog__head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;padding:22px 26px;border-bottom:1px solid var(--line)}
.op-dialog__eyebrow{margin:0 0 8px;font-size:.7rem;letter-spacing:.26em;text-transform:uppercase;color:var(--accent);font-weight:600}
.op-dialog__head h3{margin:0;font-size:clamp(1.15rem,2.4vw,1.45rem);font-weight:500;letter-spacing:-.01em}
.op-dialog__close{flex:none;width:38px;height:38px;border:1px solid var(--line-2);background:#fff;color:var(--muted);font-size:1rem;cursor:pointer;transition:border-color .2s,color .2s}
.op-dialog__close:hover{border-color:var(--ink);color:var(--ink)}
.op-dialog__body{padding:22px 26px 28px;overflow:auto;max-height:calc(88vh - 92px)}
.op-dialog__note{margin:0 0 18px;font-size:.82rem;color:var(--muted)}
.op-dialog__legend{display:flex;flex-wrap:wrap;gap:16px 26px;margin-top:24px;padding-top:16px;border-top:1px solid var(--line);font-size:.78rem;color:var(--muted)}
.op-legend__insert{display:inline-block;width:11px;height:11px;margin-right:7px;background:var(--accent-3);border:1px solid var(--accent-2);vertical-align:-1px}
.op-legend__node{display:inline-block;width:11px;height:11px;margin-right:7px;background:#fff;border:1px solid var(--line-2);vertical-align:-1px}

.flow-tree{font-size:.9rem}
.tree-item{margin-top:9px}
.tree-item:first-child{margin-top:0}
.tree-label{position:relative;display:block;border:1px solid var(--line);background:#fff;padding:9px 12px;line-height:1.55;color:var(--ink-2)}
.tree-item.is-insert > .tree-label{background:var(--accent-3);border-color:var(--accent-2);padding-left:30px}
.tree-item.is-insert > .tree-label::before{content:"";position:absolute;left:13px;top:16px;width:8px;height:8px;border-radius:50%;background:var(--accent)}
.tree-badge{display:inline-block;margin-left:7px;padding:1px 6px;font-size:.66rem;letter-spacing:.12em;color:var(--accent);background:#fff;border:1px solid var(--accent-2);white-space:nowrap}
.tree-label small{display:block;margin-top:3px;color:var(--muted);font-size:.78rem;font-weight:400}
.tree-children{margin-left:14px;border-left:1px solid var(--line-2)}
.tree-children > .tree-item{position:relative;padding-left:22px}
.tree-children > .tree-item::before{content:"";position:absolute;left:0;top:20px;width:17px;height:1px;background:var(--line-2)}
@media(max-width:760px){
  .op-dialog{width:94vw}
  .op-dialog__head,.op-dialog__body{padding-left:18px;padding-right:18px}
  .flow-tree{font-size:.85rem}
}

/* ---------- 開會共識與架構比對 ---------- */
.op-align{border-top:1px solid var(--line)}
.op-align__row{display:flex;justify-content:space-between;align-items:flex-start;gap:18px;padding:17px 2px;border-bottom:1px solid var(--line)}
.op-align__body{flex:1;min-width:0}
.op-align__body > span{font-size:.98rem;font-weight:600;color:var(--ink)}
.op-align__desc{margin:7px 0 0;font-size:.87rem;color:var(--muted);line-height:1.72;max-width:62em}
.op-chips{display:flex;flex-wrap:wrap;gap:7px;margin-top:12px}
.op-chips span{font-size:.78rem;padding:5px 12px;border:1px solid var(--line-2);background:#fff;color:var(--ink-2)}
.op-chips span.is-key{background:var(--accent-3);border-color:var(--accent-2);color:var(--accent);font-weight:600}
.op-badge{flex:none;margin-top:2px;font-size:.68rem;letter-spacing:.14em;padding:5px 11px;border:1px solid var(--line-2);color:var(--muted);white-space:nowrap}
.op-badge--ok{border-color:#c2cfb5;color:#5f7a4f;background:#f2f6ee}
.op-badge--part{border-color:var(--accent-2);color:var(--accent);background:var(--accent-3)}
.op-badge--new{border-color:var(--ink);color:#fff;background:var(--ink)}
.op-payout{margin-top:clamp(34px,4vw,54px);border:1px solid var(--line);background:var(--sand);padding:clamp(24px,3vw,42px)}
.op-payout h3{margin:8px 0 24px;font-size:clamp(1.2rem,2.2vw,1.6rem);font-weight:400;letter-spacing:-.01em}
.op-scenarios{display:grid;grid-template-columns:1fr 1fr;gap:clamp(22px,3vw,42px)}
.op-scenario h4{margin:0 0 18px;padding-bottom:12px;border-bottom:1px solid var(--line-2);font-size:1.02rem;font-weight:600;letter-spacing:.01em}
.op-ratio{display:grid;gap:16px}
.op-ratio__item{display:grid;grid-template-columns:minmax(150px,210px) 1fr auto;align-items:center;gap:16px;font-size:.9rem}
.op-ratio__item > span:first-child{color:var(--muted)}
.op-ratio__bar{height:6px;background:#e7e1d3;position:relative;overflow:hidden}
.op-ratio__bar i{position:absolute;left:0;top:0;bottom:0;background:var(--accent)}
.op-ratio__bar i.is-alt{background:var(--muted-2)}
.op-ratio__item b{font-weight:600;color:var(--ink);white-space:nowrap;font-variant-numeric:tabular-nums}
.op-note-inline{margin:22px 0 0;font-size:.8rem;color:var(--muted-2);max-width:64em}
.op-flow-note{margin:24px 0 0;padding-left:15px;border-left:3px solid var(--accent);font-size:.9rem;color:var(--muted);line-height:1.72;max-width:52em}
@media(max-width:760px){
  .op-ratio__item{grid-template-columns:1fr;gap:7px}
  .op-scenarios{grid-template-columns:1fr;gap:28px}
}