/* ═══════════════════════════════════════════
   愛肉肉穿越機代組 — 共用樣式
   ═══════════════════════════════════════════ */

/* ============ tokens ============ */
:root{
  --ink:#0B0A09;
  --ink-2:#131110;
  --ink-3:#1C1917;
  --ink-4:#272220;
  --ember:#FF6B2C;
  --ember-soft:#FF9C63;
  --ember-deep:#B23F12;
  --gold:#F5C451;
  --cream:#F3EEE6;
  --mute:#A39A8E;
  --faint:#6E655C;
  --line:rgba(255,107,44,.20);
  --line-soft:rgba(163,154,142,.15);

  --f-num:"Bahnschrift","DIN Alternate","Segoe UI Variable Display",system-ui,sans-serif;
  --f-zh:"Microsoft JhengHei","Noto Sans TC","PingFang TC",system-ui,sans-serif;

  --shell:1180px;
  --gutter:clamp(18px,4.5vw,56px);
  --r:14px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--ink);color:var(--cream);
  font-family:var(--f-zh);line-height:1.85;letter-spacing:.02em;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
:focus-visible{outline:2px solid var(--ember);outline-offset:3px;border-radius:4px}
.shell{width:min(100% - var(--gutter)*2,var(--shell));margin-inline:auto;position:relative;z-index:2}
.sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ============ 背景層 ============ */
#bg{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.55}
.grain{
  position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.5;
  background:
    radial-gradient(110% 80% at 50% -10%,rgba(255,107,44,.13),transparent 55%),
    radial-gradient(90% 70% at 50% 110%,rgba(11,10,9,.9),transparent 60%);
}

/* 類比圖傳掃描線 —— 刻意壓到很淡，只提供質地不搶戲 */
.scan{position:fixed;inset:0;z-index:1;pointer-events:none;overflow:hidden}
.scan::before{
  content:"";position:absolute;inset:0;opacity:.05;
  background:repeating-linear-gradient(0deg,#fff 0 1px,transparent 1px 3px);
}
.scan::after{
  content:"";position:absolute;left:0;right:0;height:26vh;top:-26vh;
  background:linear-gradient(180deg,transparent,rgba(255,220,190,.035) 45%,transparent);
  animation:vsweep 11s linear infinite;
}
@keyframes vsweep{to{top:110vh}}

/* 捲動進度＝油門條 */
.progress{
  position:fixed;top:0;left:0;height:2px;width:0;z-index:70;pointer-events:none;
  background:linear-gradient(90deg,var(--ember-deep),var(--ember) 55%,var(--gold));
  box-shadow:0 0 12px rgba(255,107,44,.5);
  transition:width .12s linear;
}

/* ============ 導覽 ============ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:linear-gradient(180deg,rgba(11,10,9,.94),rgba(11,10,9,.6));
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line-soft);
  transition:border-color .35s;
}
.nav.small{border-bottom-color:var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-block:14px;transition:padding .35s ease}
.nav.small .nav-in{padding-block:8px}

.brand{display:flex;align-items:center;gap:11px;min-width:0}
.brand .mark{
  width:34px;height:34px;flex:none;border-radius:9px;
  background:linear-gradient(145deg,var(--ink-3),var(--ink));
  border:1px solid var(--line);display:grid;place-items:center;position:relative;
}
.brand .mark::before,.brand .mark::after{content:"";position:absolute;border-radius:50%}
.brand .mark::before{width:11px;height:11px;border:1.6px solid var(--ember)}
.brand .mark::after{
  width:24px;height:24px;
  background:
    radial-gradient(circle at 3px 3px,var(--ember) 1.7px,transparent 1.9px),
    radial-gradient(circle at 21px 3px,var(--ember) 1.7px,transparent 1.9px),
    radial-gradient(circle at 3px 21px,var(--ember) 1.7px,transparent 1.9px),
    radial-gradient(circle at 21px 21px,var(--ember) 1.7px,transparent 1.9px);
  transition:transform .9s cubic-bezier(.3,0,.2,1);
}
.brand:hover .mark::after{transform:rotate(90deg)}
.brand b{font-size:1.02rem;font-weight:700;letter-spacing:.05em;white-space:nowrap;display:block}
.brand i{
  display:block;font-style:normal;font-family:var(--f-num);
  font-size:.6rem;letter-spacing:.32em;color:var(--ember);text-transform:uppercase;line-height:1.4;
}

.links{display:flex;align-items:center;gap:clamp(12px,2.1vw,26px)}
.links a{
  font-size:.86rem;color:var(--mute);position:relative;padding-block:5px;
  transition:color .25s;white-space:nowrap;
}
.links a::after{
  content:"";position:absolute;left:0;right:100%;bottom:0;height:1px;
  background:var(--ember);transition:right .3s ease;
}
.links a:hover{color:var(--cream)}
.links a:hover::after{right:0}

.cta{
  font-family:var(--f-zh);font-size:.85rem;font-weight:600;
  padding:9px 20px;border-radius:999px;white-space:nowrap;
  background:var(--ember);color:#1A0B03;border:1px solid var(--ember);
  transition:transform .2s ease,box-shadow .25s ease,background .25s;
  cursor:pointer;display:inline-block;
}
.cta:hover{transform:translateY(-2px);box-shadow:0 8px 26px rgba(255,107,44,.32);background:var(--ember-soft)}
.cta.ghost{background:transparent;color:var(--cream);border-color:var(--line)}
.cta.ghost:hover{background:rgba(255,107,44,.08);border-color:var(--ember);box-shadow:none}

.burger{display:none;width:40px;height:38px;border:1px solid var(--line-soft);background:transparent;border-radius:10px;cursor:pointer;position:relative}
.burger span{position:absolute;left:11px;right:11px;height:1.6px;background:var(--cream);transition:.3s}
.burger span:nth-child(1){top:13px}
.burger span:nth-child(2){top:18.5px}
.burger span:nth-child(3){top:24px}
.burger[aria-expanded="true"] span:nth-child(1){top:18.5px;transform:rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){top:18.5px;transform:rotate(-45deg)}

@media (max-width:940px){
  .burger{display:block}
  .links{
    position:fixed;inset:64px 0 auto;flex-direction:column;align-items:stretch;gap:0;
    background:rgba(11,10,9,.985);backdrop-filter:blur(16px);
    border-bottom:1px solid var(--line);padding:8px var(--gutter) 22px;
    transform:translateY(-125%);transition:transform .4s cubic-bezier(.6,0,.2,1);
  }
  .links[data-open="1"]{transform:none}
  .links a{padding:15px 0;border-bottom:1px solid var(--line-soft);font-size:.98rem}
  .links .cta{margin-top:18px;text-align:center;padding:13px 20px}
}

/* ============ HUD 準星角標（可掛在任何卡片上） ============ */
.hud{position:relative}
.hud::after{
  content:"";position:absolute;inset:9px;pointer-events:none;z-index:3;
  opacity:0;transform:scale(.985);
  transition:opacity .32s ease,transform .32s cubic-bezier(.3,0,.2,1);
  background:
    linear-gradient(var(--ember),var(--ember)) 0 0/11px 1px no-repeat,
    linear-gradient(var(--ember),var(--ember)) 0 0/1px 11px no-repeat,
    linear-gradient(var(--ember),var(--ember)) 100% 0/11px 1px no-repeat,
    linear-gradient(var(--ember),var(--ember)) 100% 0/1px 11px no-repeat,
    linear-gradient(var(--ember),var(--ember)) 0 100%/11px 1px no-repeat,
    linear-gradient(var(--ember),var(--ember)) 0 100%/1px 11px no-repeat,
    linear-gradient(var(--ember),var(--ember)) 100% 100%/11px 1px no-repeat,
    linear-gradient(var(--ember),var(--ember)) 100% 100%/1px 11px no-repeat;
}
.hud:hover::after,.hud:focus-within::after{opacity:.8;transform:none}

/* ============ 人工地平線分隔 ============ */
.horizon{
  position:relative;height:1px;margin:0;z-index:2;
  background:linear-gradient(90deg,transparent,var(--line-soft) 18%,var(--line-soft) 82%,transparent);
}
.horizon::before,.horizon::after{
  content:"";position:absolute;top:50%;width:26px;height:1px;background:var(--ember);
  opacity:.55;
}
.horizon::before{left:calc(50% - 46px)}
.horizon::after{right:calc(50% - 46px)}
.horizon span{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:9px;height:9px;border:1px solid var(--ember);
  background:var(--ink);rotate:45deg;opacity:.75;
}
.horizon span::after{
  content:"";position:absolute;inset:2px;background:var(--ember);opacity:.35;
}

/* ============ hero ============ */
.hero{padding:clamp(120px,17vh,180px) 0 clamp(70px,10vh,110px);position:relative}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 400px;gap:clamp(24px,4vw,60px);align-items:center}
@media (max-width:1040px){
  .hero-grid{grid-template-columns:1fr}
  .hero-art{display:none}
}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--f-num);font-size:.68rem;letter-spacing:.34em;text-transform:uppercase;
  color:var(--ember);margin-bottom:26px;
}
.eyebrow::before{content:"";width:34px;height:1px;background:var(--ember)}

h1{
  font-size:clamp(2.1rem,6.4vw,4.05rem);line-height:1.22;font-weight:800;
  letter-spacing:-.005em;margin:0 0 26px;max-width:16em;
}
h1 em{font-style:normal;color:var(--ember);position:relative;white-space:nowrap}
h1 em::after{
  content:"";position:absolute;left:0;right:0;bottom:.06em;height:.28em;z-index:-1;
  background:linear-gradient(90deg,rgba(255,107,44,.28),transparent);
  transform-origin:left;animation:lock 1.1s cubic-bezier(.4,0,.15,1) .35s both;
}
@keyframes lock{from{transform:scaleX(0)}to{transform:scaleX(1)}}

.lede{font-size:clamp(1rem,2vw,1.14rem);color:var(--mute);max-width:34em;margin:0 0 40px}
.hero-cta{display:flex;flex-wrap:wrap;gap:13px;align-items:center}

.stats{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:1px;background:var(--line-soft);border:1px solid var(--line-soft);
  border-radius:var(--r);overflow:hidden;margin-top:clamp(52px,8vh,84px);
}
.stats div{background:var(--ink);padding:22px 24px}
.stats dt{font-family:var(--f-num);font-size:.64rem;letter-spacing:.26em;color:var(--faint);text-transform:uppercase;margin:0 0 8px}
.stats dd{margin:0;font-size:.95rem;color:var(--cream);line-height:1.6}
.stats dd b{font-family:var(--f-num);font-size:1.5rem;color:var(--ember);font-weight:700;margin-right:4px;font-variant-numeric:tabular-nums}

/* ============ hero 3D 機體 ============ */
.hero-art{position:relative;display:grid;place-items:center;min-height:400px}
.hero-3d{position:absolute;inset:0;perspective:900px;perspective-origin:50% 42%}
.hero-world{position:absolute;inset:0;transform-style:preserve-3d;transform:rotateX(58deg)}
.hero-craft{position:absolute;left:50%;top:50%;transform-style:preserve-3d;animation:heroFly 14s ease-in-out infinite}
@keyframes heroFly{
  0%,100%{transform:translate3d(0,4px,34px)   rotateZ(0deg)   rotateY(0deg)   rotateX(0deg)}
  25%    {transform:translate3d(30px,-18px,58px) rotateZ(90deg)  rotateY(-14deg) rotateX(7deg)}
  50%    {transform:translate3d(0,14px,40px)  rotateZ(180deg) rotateY(0deg)   rotateX(-7deg)}
  75%    {transform:translate3d(-30px,-16px,60px) rotateZ(270deg) rotateY(14deg)  rotateX(6deg)}
}
.hero-shadow{
  position:absolute;left:50%;top:50%;width:150px;height:150px;margin:-75px;
  border-radius:50%;background:radial-gradient(closest-side,rgba(0,0,0,.6),transparent);
  animation:heroShadow 14s ease-in-out infinite;
}
@keyframes heroShadow{
  0%,100%{transform:translate3d(0,4px,0) scale(.9);opacity:.5}
  25%    {transform:translate3d(30px,-18px,0) scale(.72);opacity:.32}
  50%    {transform:translate3d(0,14px,0) scale(.86);opacity:.45}
  75%    {transform:translate3d(-30px,-16px,0) scale(.7);opacity:.3}
}

/* ============ 無人機線稿（保留給其他用途） ============ */
.drone{width:100%;max-width:400px;overflow:visible;animation:hover-float 7s ease-in-out infinite}
@keyframes hover-float{
  0%,100%{transform:translateY(-6px) rotate(-1.1deg)}
  50%{transform:translateY(8px) rotate(1.1deg)}
}
.drone .prop{transform-box:fill-box;transform-origin:center;animation:spin var(--spin,.7s) linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* 由中心擴散的探測環 */
.drone .ping{transform-box:fill-box;transform-origin:center;animation:ping 3.6s ease-out infinite}
.drone .ping.b{animation-delay:1.8s}
@keyframes ping{
  0%{transform:scale(.35);opacity:.55}
  70%{opacity:0}
  100%{transform:scale(1.6);opacity:0}
}

/* ============ OSD 遙測疊層 ============ */
.osd{
  position:absolute;inset:0;pointer-events:none;z-index:2;
  font-family:var(--f-num);font-variant-numeric:tabular-nums;
  color:var(--ember);opacity:.62;
}
@media (max-width:1040px){.osd{display:none}}
.osd .cnr{position:absolute;width:22px;height:22px;opacity:.75}
.osd .cnr::before,.osd .cnr::after{content:"";position:absolute;background:var(--ember)}
.osd .cnr::before{width:100%;height:1px}
.osd .cnr::after{width:1px;height:100%}
.osd .cnr.tl{top:0;left:0}
.osd .cnr.tr{top:0;right:0}
.osd .cnr.tr::before{right:0}.osd .cnr.tr::after{right:0}
.osd .cnr.bl{bottom:0;left:0}
.osd .cnr.bl::before{bottom:0}
.osd .cnr.br{bottom:0;right:0}
.osd .cnr.br::before{bottom:0;right:0}.osd .cnr.br::after{right:0}

.osd .stack{position:absolute;display:grid;gap:7px;font-size:.68rem;letter-spacing:.13em}
.osd .stack.l{left:0;top:52%}
.osd .stack.r{right:0;top:52%;text-align:right;justify-items:end}
.osd .row{display:flex;align-items:center;gap:8px;white-space:nowrap}
.osd .row i{font-style:normal;color:var(--faint);font-size:.62rem;letter-spacing:.2em}
.osd .row b{font-weight:700;color:var(--gold);min-width:3.4em;display:inline-block}
.osd .stack.r .row b{text-align:right}

.osd .bars{display:flex;gap:3px;align-items:flex-end;height:13px}
.osd .bars i{display:block;width:3px;background:var(--ember);opacity:.28;transition:opacity .25s}
.osd .bars i:nth-child(1){height:4px}
.osd .bars i:nth-child(2){height:6px}
.osd .bars i:nth-child(3){height:8px}
.osd .bars i:nth-child(4){height:10.5px}
.osd .bars i:nth-child(5){height:13px}
.osd .bars i.on{opacity:.95}

.osd .armed{
  position:absolute;left:50%;bottom:6px;transform:translateX(-50%);
  display:flex;align-items:center;gap:9px;font-size:.64rem;letter-spacing:.28em;
}
.osd .armed s{
  width:6px;height:6px;border-radius:50%;background:var(--ember);text-decoration:none;
  animation:blip 1.7s ease-in-out infinite;
}
@keyframes blip{0%,100%{opacity:1}50%{opacity:.18}}

/* ============ section 基礎 ============ */
section{padding:clamp(74px,11vh,124px) 0;position:relative}
.sec-head{margin-bottom:clamp(40px,6vh,64px);max-width:40em}
.sec-no{
  font-family:var(--f-num);font-size:.66rem;letter-spacing:.3em;color:var(--faint);
  text-transform:uppercase;display:block;margin-bottom:14px;
}
.sec-no b{color:var(--ember);font-weight:700}
h2{font-size:clamp(1.6rem,4vw,2.5rem);line-height:1.35;font-weight:800;margin:0 0 16px;letter-spacing:-.005em}
h2 span{color:var(--ember)}
.sec-head p{color:var(--mute);margin:0;font-size:clamp(.94rem,1.7vw,1.03rem);max-width:36em}

.rule{height:1px;background:linear-gradient(90deg,var(--line),transparent);border:0;margin:0}

/* ============ 服務卡 ============ */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(258px,1fr));gap:16px}
.card{
  background:linear-gradient(160deg,var(--ink-2),var(--ink));
  border:1px solid var(--line-soft);border-radius:var(--r);
  padding:30px 26px 32px;position:relative;overflow:hidden;
  transition:border-color .3s,transform .3s ease;
}
.card::before{
  content:"";position:absolute;inset:0 auto auto 0;width:100%;height:1px;z-index:3;
  background:linear-gradient(90deg,var(--ember),transparent);
  transform:scaleX(0);transform-origin:left;transition:transform .45s ease;
}
.card:hover{border-color:var(--line);transform:translateY(-4px)}
.card:hover::before{transform:scaleX(1)}
.ico{
  width:42px;height:42px;border-radius:11px;display:grid;place-items:center;
  background:rgba(255,107,44,.09);border:1px solid var(--line);margin-bottom:20px;
  transition:transform .35s cubic-bezier(.3,0,.2,1);
}
.card:hover .ico{transform:rotate(-8deg) scale(1.06)}
.ico svg{width:20px;height:20px;stroke:var(--ember);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.card h3{font-size:1.1rem;margin:0 0 10px;font-weight:700;letter-spacing:.01em}
.card p{color:var(--mute);font-size:.92rem;margin:0}

/* ============ 機型 ============ */
.builds{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.build{
  border:1px solid var(--line-soft);border-radius:var(--r);
  background:var(--ink-2);padding:0;overflow:hidden;position:relative;
  transition:border-color .3s,transform .3s;
}
.build:hover{border-color:var(--line);transform:translateY(-4px)}
.build .size{
  padding:26px 24px 20px;border-bottom:1px solid var(--line-soft);position:relative;overflow:hidden;
  background:linear-gradient(150deg,rgba(255,107,44,.07),transparent 70%);
}
.build .size b{font-family:var(--f-num);font-size:2.4rem;font-weight:700;color:var(--cream);line-height:1;position:relative;z-index:2}
.build .size i{font-style:normal;font-family:var(--f-num);font-size:.9rem;color:var(--ember);margin-left:3px;position:relative;z-index:2}
.build .size p{margin:9px 0 0;font-size:.78rem;letter-spacing:.22em;color:var(--faint);font-family:var(--f-num);text-transform:uppercase;position:relative;z-index:2}

/* 螺旋槳：尺寸與轉速對應真實直覺——槳越小轉越快 */
.build .rotor{
  position:absolute;right:-14px;top:50%;translate:0 -50%;
  width:var(--size,70px);height:var(--size,70px);
  opacity:.34;transition:opacity .3s;
}
.build:hover .rotor{opacity:.62}
.build .rotor svg{width:100%;height:100%;overflow:visible;animation:spin var(--spin,.8s) linear infinite}
.build .rotor svg *{stroke:var(--ember);fill:none}

.build .body{padding:22px 24px 26px}
.build h3{font-size:1.02rem;margin:0 0 10px;font-weight:700}
.build p.desc{color:var(--mute);font-size:.9rem;margin:0 0 16px}
.build ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:7px}
.build li{
  font-size:.74rem;color:var(--mute);padding:4px 10px;border-radius:999px;
  border:1px solid var(--line-soft);background:var(--ink-3);
  transition:border-color .25s,color .25s;
}
.build:hover li{border-color:var(--line)}

/* ============ 流程 ============ */
.flow{position:relative;display:grid;gap:0}
.step{
  display:grid;grid-template-columns:64px 1fr;gap:clamp(16px,3vw,32px);
  padding:26px 0;border-top:1px solid var(--line-soft);align-items:start;
  transition:background .3s;
}
.step:last-child{border-bottom:1px solid var(--line-soft)}
.step .n{
  font-family:var(--f-num);font-size:1.5rem;font-weight:700;color:var(--ember);
  line-height:1.2;font-variant-numeric:tabular-nums;position:relative;
}
.step .n::after{
  content:"";position:absolute;left:0;bottom:-4px;width:0;height:1px;
  background:var(--ember);transition:width .4s ease;
}
.step:hover .n::after{width:34px}
.step h3{font-size:1.06rem;margin:0 0 8px;font-weight:700}
.step p{color:var(--mute);font-size:.92rem;margin:0;max-width:44em}

/* ============ 代購 ============ */
.parts-wrap{
  border:1px solid var(--line-soft);border-radius:var(--r);
  background:linear-gradient(160deg,var(--ink-2),var(--ink));padding:clamp(28px,4vw,44px);
  position:relative;overflow:hidden;
}
.chips{display:flex;flex-wrap:wrap;gap:9px;margin-top:8px;position:relative;z-index:2}
.chips span{
  font-size:.86rem;color:var(--cream);padding:8px 16px;border-radius:999px;
  border:1px solid var(--line-soft);background:var(--ink-3);
  transition:border-color .25s,color .25s,transform .25s;
}
.chips span:hover{border-color:var(--ember);color:var(--ember);transform:translateY(-2px)}
.note{
  margin-top:26px;padding-top:22px;border-top:1px solid var(--line-soft);
  color:var(--faint);font-size:.86rem;position:relative;z-index:2;
}

/* ============ FAQ ============ */
.faq{display:grid;gap:0;border-top:1px solid var(--line-soft)}
details{border-bottom:1px solid var(--line-soft)}
summary{
  list-style:none;cursor:pointer;padding:22px 44px 22px 0;position:relative;
  font-size:1rem;font-weight:600;transition:color .25s;
}
summary::-webkit-details-marker{display:none}
summary:hover{color:var(--ember)}
summary::after{
  content:"";position:absolute;right:8px;top:50%;width:11px;height:11px;
  border-right:1.8px solid var(--ember);border-bottom:1.8px solid var(--ember);
  transform:translateY(-70%) rotate(45deg);transition:transform .3s;
}
details[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
details p{color:var(--mute);font-size:.93rem;margin:0 0 24px;max-width:48em;padding-right:44px}

/* ═══════════ 3D 穿越機模型（CSS 3D，非平面圖） ═══════════ */
.q{position:absolute;left:50%;top:50%;width:0;height:0;transform-style:preserve-3d}
.q *{transform-style:preserve-3d}
.q .f{position:absolute;left:50%;top:50%;transform-origin:center}

/* 碳纖維材質 */
.q .carbon{
  background:
    repeating-linear-gradient(45deg,rgba(255,255,255,.045) 0 2px,transparent 2px 4px),
    repeating-linear-gradient(-45deg,rgba(0,0,0,.5) 0 2px,transparent 2px 4px),
    linear-gradient(160deg,#22201d,#111010);
  box-shadow:inset 0 0 0 1px rgba(255,150,90,.14);
}

/* 底板 / 上板 */
.q .plate{width:92px;height:64px;margin:-32px 0 0 -46px;border-radius:11px}
.q .plate.top{transform:translateZ(19px)}
.q .plate.mid{transform:translateZ(9px);opacity:.9}
.q .plate.bot{transform:translateZ(0)}

/* 機臂：三層堆疊做出厚度 */
.q .arm{
  width:82px;height:14px;margin:-7px 0 0 0;border-radius:4px;
  transform-origin:0 50%;
}
.q .arm::after{
  content:"";position:absolute;inset:0;border-radius:4px;
  background:linear-gradient(180deg,rgba(255,255,255,.10),transparent 55%);
}
.q .arm.l2{opacity:.85}
.q .arm.l3{opacity:.6}

/* 馬達：堆疊環模擬鐘型座 */
.q .bell{
  width:28px;height:28px;margin:-14px 0 0 -14px;border-radius:50%;
  background:
    radial-gradient(circle at 34% 28%,#6d6a66,#2b2926 62%,#191817);
  box-shadow:inset 0 0 0 1px rgba(255,160,100,.22);
}
.q .bell.r2{width:25px;height:25px;margin:-12.5px 0 0 -12.5px}
.q .bell.r3{width:22px;height:22px;margin:-11px 0 0 -11px}
.q .bell.cap{
  width:12px;height:12px;margin:-6px 0 0 -6px;
  background:radial-gradient(circle at 36% 30%,var(--ember-soft),var(--ember-deep));
  box-shadow:0 0 10px rgba(255,107,44,.55);
}

/* 螺旋槳 */
.q .rot{width:0;height:0}
.q .blade{
  width:60px;height:11px;margin:-5.5px 0 0 0;transform-origin:0 50%;
  border-radius:0 40% 40% 0/0 50% 50% 0;
  background:linear-gradient(180deg,rgba(255,156,99,.85),rgba(178,63,18,.55));
  box-shadow:0 0 6px rgba(255,107,44,.28);
}
.q .disc{
  width:124px;height:124px;margin:-62px 0 0 -62px;border-radius:50%;
  background:radial-gradient(closest-side,transparent 52%,rgba(255,156,99,.16) 70%,transparent 92%);
  border:1px solid rgba(255,156,99,.10);
  opacity:0;transition:opacity .18s linear;
}

/* 電池 */
.q .batt{
  width:60px;height:34px;margin:-17px 0 0 -30px;border-radius:6px;
  background:linear-gradient(150deg,#2a2622,#151312);
  box-shadow:inset 0 0 0 1px rgba(255,150,90,.16);
  transform:translateZ(27px);
}
.q .batt::after{
  content:"";position:absolute;left:-3px;right:-3px;top:9px;height:5px;
  background:repeating-linear-gradient(90deg,rgba(255,107,44,.5) 0 5px,transparent 5px 10px);
  opacity:.55;
}

/* 攝影頭 */
.q .cam{
  width:26px;height:22px;margin:-11px 0 0 -13px;border-radius:5px;
  background:linear-gradient(160deg,#3a3733,#171615);
  box-shadow:inset 0 0 0 1px rgba(255,150,90,.2);
}
.q .lens{
  width:13px;height:13px;margin:-6.5px 0 0 -6.5px;border-radius:50%;
  background:radial-gradient(circle at 36% 32%,#8fd6ff,#0b2740 62%,#050b12);
  box-shadow:0 0 9px rgba(79,190,255,.5),inset 0 0 0 1px rgba(160,220,255,.35);
}

/* 天線 */
.q .ant{
  width:34px;height:3px;margin:-1.5px 0 0 0;transform-origin:0 50%;border-radius:2px;
  background:linear-gradient(90deg,#3a3733,rgba(255,107,44,.75));
}

/* 機底 LED */
.q .led{
  width:7px;height:7px;margin:-3.5px 0 0 -3.5px;border-radius:50%;
  background:var(--ember);box-shadow:0 0 12px 3px rgba(255,107,44,.65);
}
.q .led.b{background:#4FD2FF;box-shadow:0 0 12px 3px rgba(79,210,255,.6)}

/* ============ 試飛台（美國手模擬器） ============ */
.sim{display:grid;gap:16px}

.sim-stage{
  position:relative;overflow:hidden;
  height:clamp(300px,46vh,440px);
  border:1px solid var(--line-soft);border-radius:var(--r);
  background:
    radial-gradient(120% 80% at 50% 0%,rgba(255,107,44,.10),transparent 60%),
    linear-gradient(180deg,var(--ink-2),var(--ink));
  perspective:1000px;perspective-origin:50% 47%;
  /* 畫面區不攔截觸控——否則手機上這塊會變成捲不過去的死角 */
}

/* 地面：透視格線。鏡頭角度不能太平，否則機體會被壓成一條線 */
.sim-world{position:absolute;inset:0;transform-style:preserve-3d;transform:rotateX(54deg) translateY(26px)}
.sim-ground{
  position:absolute;inset:-60%;
  background-image:
    linear-gradient(to right,rgba(255,107,44,.16) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(255,107,44,.16) 1px,transparent 1px);
  background-size:52px 52px;
  -webkit-mask-image:radial-gradient(closest-side,#000 35%,transparent 78%);
  mask-image:radial-gradient(closest-side,#000 35%,transparent 78%);
  opacity:.55;
}
.sim-pad-mark{
  position:absolute;left:50%;top:50%;width:118px;height:118px;margin:-59px;
  border:1px solid var(--line);border-radius:50%;opacity:.5;
}
.sim-pad-mark::after{
  content:"";position:absolute;inset:22px;border:1px dashed var(--line);border-radius:50%;
}

.sim-shadow{
  position:absolute;left:50%;top:50%;width:110px;height:110px;margin:-55px;
  border-radius:50%;background:radial-gradient(closest-side,rgba(0,0,0,.72),transparent);
  will-change:transform,opacity;
}

.sim-lift{position:absolute;left:50%;top:50%;transform-style:preserve-3d;will-change:transform}
.sim-craft{
  width:180px;height:180px;margin:-90px 0 0 -90px;
  transform-style:preserve-3d;will-change:transform;
}
.sim-craft svg{width:100%;height:100%;overflow:visible}
/* 模擬器的槳由 JS 依油門即時驅動，不用 CSS 動畫 */
.sim-craft .prop{transform-box:fill-box;transform-origin:center}

/* 讀數 */
.sim-osd{
  position:absolute;left:0;right:0;bottom:0;z-index:3;pointer-events:none;
  display:flex;flex-wrap:wrap;gap:8px 22px;justify-content:center;
  padding:11px 16px;background:linear-gradient(0deg,rgba(11,10,9,.82),transparent);
  font-family:var(--f-num);font-size:.68rem;letter-spacing:.16em;color:var(--mute);
  font-variant-numeric:tabular-nums;
}
.sim-osd span{display:flex;gap:7px;align-items:baseline;white-space:nowrap}
.sim-osd i{font-style:normal;color:var(--faint);font-size:.62rem;letter-spacing:.2em}
.sim-osd b{color:var(--gold);font-weight:700;min-width:3.6em;display:inline-block}
.sim-osd .st{color:var(--ember)}

.sim-badge{
  position:absolute;top:12px;left:14px;z-index:3;
  font-family:var(--f-num);font-size:.62rem;letter-spacing:.26em;text-transform:uppercase;
  color:var(--ember);border:1px solid var(--line);border-radius:999px;
  padding:4px 12px;background:rgba(11,10,9,.5);
}
.sim-reset{
  position:absolute;top:12px;right:14px;z-index:4;
  font-family:var(--f-num);font-size:.62rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--mute);border:1px solid var(--line-soft);border-radius:999px;
  padding:5px 14px;background:rgba(11,10,9,.55);cursor:pointer;
  transition:color .25s,border-color .25s;
}
.sim-reset:hover{color:var(--ember);border-color:var(--line)}

/* 兩支搖桿：真實遙控器是左右並排，任何寬度都不拆成上下 */
.sim-ctrl{display:grid;grid-template-columns:1fr 1fr;gap:clamp(10px,2vw,16px)}

.stick{
  border:1px solid var(--line-soft);border-radius:var(--r);
  background:linear-gradient(160deg,var(--ink-2),var(--ink));
  padding:18px 20px 20px;display:grid;justify-items:center;gap:12px;
  min-width:0;
}
.stick h4{
  margin:0;font-family:var(--f-num);font-size:.64rem;letter-spacing:.26em;
  text-transform:uppercase;color:var(--faint);text-align:center;
  white-space:nowrap;
  /* 不同漢字會落到不同後備字型，行框高度會差幾 px，導致兩支搖桿高低不齊。
     這裡把標題列高度鎖死，讓兩邊的搖桿一定對齊。 */
  line-height:1.5;
  height:1.6em;
  min-height:0;        /* grid item 的自動最小尺寸會蓋掉 height，必須歸零 */
  display:grid;
  place-items:center;
}
.stick h4 b{color:var(--ember);font-weight:700}
.pad{
  position:relative;width:min(178px,100%);aspect-ratio:1;
  border:1px solid var(--line);border-radius:16px;
  background:
    radial-gradient(closest-side,rgba(255,107,44,.07),transparent 72%),
    var(--ink-3);
  touch-action:none;cursor:grab;
}
.pad:active{cursor:grabbing}
.pad:focus-visible{outline:2px solid var(--ember);outline-offset:3px}
.pad::before,.pad::after{content:"";position:absolute;background:var(--line-soft)}
.pad::before{left:8px;right:8px;top:50%;height:1px}
.pad::after{top:8px;bottom:8px;left:50%;width:1px}
.knob{
  position:absolute;left:50%;top:50%;width:44px;height:44px;margin:-22px;
  border-radius:50%;z-index:2;
  background:radial-gradient(circle at 34% 30%,var(--ember-soft),var(--ember-deep));
  border:1px solid rgba(255,180,130,.5);
  box-shadow:0 6px 20px rgba(255,107,44,.3),inset 0 -3px 8px rgba(0,0,0,.35);
  will-change:transform;
}
.knob::after{
  content:"";position:absolute;inset:15px;border-radius:50%;
  border:1px solid rgba(26,11,3,.45);
}
.stick p{margin:0;color:var(--mute);font-size:.8rem;text-align:center;line-height:1.7}
.stick p b{color:var(--cream);font-weight:600}

/* 軸向提示 */
.sim-hints{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:10px}
.hint{
  border:1px solid var(--line-soft);border-radius:12px;background:var(--ink-2);
  padding:13px 16px;transition:border-color .25s,background .25s;
}
.hint.live{border-color:var(--ember);background:rgba(255,107,44,.07)}
.hint b{display:block;font-size:.88rem;margin-bottom:3px}
.hint.live b{color:var(--ember)}
.hint span{color:var(--faint);font-size:.78rem;letter-spacing:.05em}

/* 小螢幕：縮小元件而不是改變版面配置 */
@media (max-width:600px){
  .sim-stage{height:clamp(250px,40vh,330px)}
  .stick{padding:13px 10px 15px;gap:9px}
  .stick h4{font-size:.57rem;letter-spacing:.16em}
  .stick p{font-size:.71rem;line-height:1.6}
  .knob{width:34px;height:34px;margin:-17px}
  .knob::after{inset:11px}
  .sim-osd{font-size:.6rem;gap:5px 13px;padding:9px 10px}
  .sim-osd i{font-size:.56rem;letter-spacing:.14em}
  .sim-osd b{min-width:3em}
  .sim-badge,.sim-reset{font-size:.55rem;padding:4px 10px}
  .sim-hints{grid-template-columns:1fr 1fr;gap:8px}
  .hint{padding:10px 12px}
  .hint b{font-size:.79rem}
  .hint span{font-size:.69rem}
}

/* ============ 主理人簡歷 ============ */
.bio{display:grid;grid-template-columns:340px minmax(0,1fr);gap:clamp(22px,3.6vw,48px);align-items:start}
@media (max-width:900px){.bio{grid-template-columns:1fr}}

.bio-card{
  border:1px solid var(--line-soft);border-radius:var(--r);
  background:linear-gradient(165deg,var(--ink-3),var(--ink));
  padding:32px 28px 28px;position:relative;overflow:hidden;
}
.bio-card::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background:repeating-linear-gradient(0deg,rgba(243,238,230,.045) 0 1px,transparent 1px 4px);
}

/* 識別章：輪廓字 + 刻度環 + 旋轉虛線環 */
.bio-mark{width:150px;height:150px;margin:0 auto 24px;position:relative;display:grid;place-items:center}
.bio-mark svg{position:absolute;inset:0;width:100%;height:100%;overflow:visible}
.bio-mark .ring{fill:none;stroke:var(--line);stroke-width:1}
.bio-mark .ticks{fill:none;stroke:var(--ember);stroke-width:1.4;opacity:.5}
.bio-mark .dash{
  fill:none;stroke:var(--ember);stroke-width:1.2;stroke-dasharray:3 9;opacity:.75;
  transform-box:fill-box;transform-origin:center;animation:spin 18s linear infinite;
}
.bio-mark .glow{fill:url(#bioGlow);opacity:.5}
.bio-mark b{
  position:relative;z-index:2;font-family:var(--f-num);font-size:3.05rem;font-weight:700;
  letter-spacing:.04em;color:transparent;
  -webkit-text-stroke:1.3px var(--ember);
  text-shadow:0 0 26px rgba(255,107,44,.32);
}

.bio-card h3{
  font-size:1.42rem;font-weight:800;margin:0 0 4px;text-align:center;letter-spacing:.08em;
  position:relative;z-index:2;
}
.bio-card h3 span{
  display:block;font-family:var(--f-num);font-size:.76rem;font-weight:400;
  letter-spacing:.34em;color:var(--ember);margin-top:7px;text-transform:uppercase;
}
.bio-role{
  text-align:center;color:var(--mute);font-size:.85rem;margin:14px 0 24px;
  padding-bottom:22px;border-bottom:1px solid var(--line-soft);position:relative;z-index:2;
}
.bio-meta{margin:0;display:grid;gap:13px;position:relative;z-index:2}
.bio-meta div{display:grid;grid-template-columns:52px 1fr;gap:12px;align-items:baseline}
.bio-meta dt{
  font-family:var(--f-num);font-size:.6rem;letter-spacing:.2em;color:var(--faint);
  text-transform:uppercase;margin:0;
}
.bio-meta dd{margin:0;font-size:.88rem;color:var(--cream);word-break:break-word}
.bio-meta dd a{border-bottom:1px solid transparent;transition:color .25s,border-color .25s}
.bio-meta dd a:hover{color:var(--ember);border-bottom-color:var(--line)}

.bio-body h4{
  font-family:var(--f-num);font-size:.66rem;letter-spacing:.3em;color:var(--faint);
  text-transform:uppercase;margin:34px 0 18px;font-weight:400;
  display:flex;align-items:center;gap:12px;
}
.bio-body h4::after{content:"";flex:1;height:1px;background:var(--line-soft)}
.bio-body h4:first-child{margin-top:0}
.bio-body>p{color:var(--mute);font-size:.96rem;margin:0 0 16px;max-width:46em}
.bio-body>p strong{color:var(--cream);font-weight:600}

.bio-tags{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 4px}
.bio-tags span{
  font-size:.78rem;color:var(--ember);padding:5px 13px;border-radius:999px;
  border:1px solid var(--line);background:rgba(255,107,44,.06);
}

/* 經歷條列 */
.cv{list-style:none;margin:0;padding:0;display:grid;gap:1px;background:var(--line-soft);
  border:1px solid var(--line-soft);border-radius:var(--r);overflow:hidden}
.cv li{
  background:var(--ink-2);padding:14px 20px;display:flex;align-items:center;
  justify-content:space-between;gap:16px;flex-wrap:wrap;
  transition:background .25s;
}
.cv li:hover{background:var(--ink-3)}
.cv b{font-size:.93rem;font-weight:600;color:var(--cream)}
.cv i{
  font-style:normal;font-size:.72rem;letter-spacing:.12em;white-space:nowrap;
  padding:3px 11px;border-radius:999px;border:1px solid var(--line-soft);color:var(--mute);
}
.cv i[data-k="冠軍"]{color:var(--gold);border-color:rgba(245,196,81,.35);background:rgba(245,196,81,.07)}
.cv i[data-k="技術長"]{color:var(--ember);border-color:var(--line);background:rgba(255,107,44,.07)}

/* ============ 聯絡 ============ */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(22px,4vw,48px);align-items:start}
@media (max-width:820px){.contact-grid{grid-template-columns:1fr}}

.info{display:grid;gap:1px;background:var(--line-soft);border:1px solid var(--line-soft);border-radius:var(--r);overflow:hidden}
.info div{background:var(--ink-2);padding:20px 24px}
.info dt{font-family:var(--f-num);font-size:.64rem;letter-spacing:.26em;color:var(--faint);text-transform:uppercase;margin:0 0 7px}
.info dd{margin:0;font-size:.97rem;color:var(--cream)}
.info dd a:hover{color:var(--ember)}
.todo{color:var(--gold);font-size:.9rem}

form{
  border:1px solid var(--line-soft);border-radius:var(--r);
  background:linear-gradient(160deg,var(--ink-2),var(--ink));padding:clamp(24px,3.4vw,34px);
}
.field{margin-bottom:18px}
.field label{display:block;font-size:.8rem;color:var(--mute);margin-bottom:8px;letter-spacing:.04em}
.field label b{color:var(--ember);font-weight:400}
.field input,.field select,.field textarea{
  width:100%;background:var(--ink);border:1px solid var(--line-soft);border-radius:10px;
  color:var(--cream);font-family:var(--f-zh);font-size:.94rem;padding:12px 14px;
  transition:border-color .25s,background .25s,box-shadow .25s;
}
.field textarea{min-height:112px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--ember);background:var(--ink-2);
  box-shadow:0 0 0 3px rgba(255,107,44,.09);
}
.field input::placeholder,.field textarea::placeholder{color:var(--faint)}
.field select{appearance:none;cursor:pointer;background-image:linear-gradient(45deg,transparent 50%,var(--ember) 50%),linear-gradient(135deg,var(--ember) 50%,transparent 50%);background-position:calc(100% - 19px) 50%,calc(100% - 13px) 50%;background-size:6px 6px,6px 6px;background-repeat:no-repeat}
form .cta{width:100%;padding:14px;font-size:.95rem}
.form-note{margin:16px 0 0;font-size:.84rem;color:var(--faint);min-height:1.5em}
.form-note[data-ok]{color:var(--gold)}

/* ============ footer ============ */
footer{border-top:1px solid var(--line-soft);padding:44px 0 52px;position:relative;z-index:2}
.foot{display:flex;flex-wrap:wrap;gap:20px;justify-content:space-between;align-items:center}
.foot p{margin:0;color:var(--faint);font-size:.82rem}
.foot nav{display:flex;gap:20px;flex-wrap:wrap}
.foot nav a{color:var(--faint);font-size:.82rem;transition:color .25s}
.foot nav a:hover{color:var(--ember)}

/* ============ 進場動畫 ============ */
/* 只有在 JS 可用時才把元素藏起來——JS 失效時內容必須照樣看得見 */
.js [data-rise]{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s cubic-bezier(.4,0,.2,1)}
.js [data-rise].in{opacity:1;transform:none}

/* ============ 降級：尊重使用者的動畫偏好 ============ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  [data-rise]{opacity:1;transform:none}
  #bg,.scan::after{display:none}
  .drone{animation:none}
  .drone .prop,.build .rotor svg{animation:none}
  .drone .ping{display:none}
  h1 em::after{animation:none}
}