*{margin:0;padding:0;box-sizing:border-box;}
button,a{outline:none;}
button:focus-visible,a:focus-visible{outline:2px solid var(--yellow);outline-offset:3px;}
:root{
  --yellow:#FFD300;
  --black:#0A0A0A;
  --white:#FFFFFF;
  --dark-gray:#1A1A1A;
  --mid-gray:#888888;
  --border-radius-card:14px;
  --border-radius-btn:40px;
  --fs-h1:clamp(72px,11vw,140px);
  --fs-h2:clamp(28px,4vw,48px);
  --fs-h3:clamp(18px,2.5vw,26px);
  --fs-h4:20px;
  --fs-body:16px;
  --fs-small:14px;
  --fs-nav:14px;
  --lh-body:1.8;
  --lh-heading:1.1;
}
html{scroll-behavior:smooth;}
body{font-family:'Noto Sans TC',sans-serif;font-size:var(--fs-body);background:var(--black);color:var(--white);overflow-x:hidden;line-height:var(--lh-body);}
::-webkit-scrollbar{width:4px;}
::-webkit-scrollbar-track{background:var(--black);}
::-webkit-scrollbar-thumb{background:var(--yellow);}

/* ══ TOP BG ══ */
.top-fixed-bg{display:none;}

/* ══ STICKY NAV WRAPPER ══ */
.sticky-nav-wrapper{position:sticky;top:0;z-index:300;background:var(--black);}
/* WP 後台工具列（admin bar）會佔掉頂端 32px，sticky 元素的 top 要跟著讓開，否則會出現一條縫 */
body.admin-bar .sticky-nav-wrapper{top:32px;}
@media screen and (max-width:782px){
  body.admin-bar .sticky-nav-wrapper{top:46px;}
}

/* ══ PROMO BAR ══ */
.promo-bar{position:relative;width:100%;height:36px;background:var(--black);color:var(--yellow);overflow:hidden;}
.promo-bar-track{position:relative;width:100%;height:100%;}
.promo-item{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;gap:6px;padding:0 16px;text-align:center;font-size:12px;letter-spacing:1px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;opacity:0;transform:translateY(100%);transition:transform .6s cubic-bezier(.16,1,.3,1),opacity .6s;}
.promo-item.active{opacity:1;transform:translateY(0);}
.promo-item.prev{opacity:0;transform:translateY(-100%);}

/* ══ NAV ══ */
nav{position:relative;width:100%;z-index:200;padding:0 48px;height:68px;display:flex;align-items:center;justify-content:space-between;background:rgba(242,242,242,0.97);border-bottom:1px solid rgba(0,0,0,.08);transition:box-shadow .3s;}
nav.scrolled{box-shadow:0 2px 20px rgba(0,0,0,.12);}
.nav-logo img{height:36px;width:auto;display:block;}
.nav-center{display:flex;align-items:center;gap:32px;list-style:none;}
.nav-center li{position:relative;display:flex;align-items:center;}
.nav-center a,.nav-center button{font-family:'Noto Sans TC',sans-serif;font-size:var(--fs-nav);font-weight:500;letter-spacing:.5px;color:var(--black);text-decoration:none;background:none;border:none;cursor:pointer;padding:4px 0;transition:color .2s;}
.nav-center a:hover,.nav-center button:hover{color:rgba(0,0,0,.4);}
.nav-arrow{font-size:10px;margin-left:4px;display:inline-block;transition:transform .3s;}
.nav-center li:hover .nav-arrow{transform:rotate(180deg);}
.nav-dropdown{position:absolute;top:calc(100% + 16px);left:50%;transform:translateX(-50%) translateY(-8px);background:var(--white);border:1px solid rgba(0,0,0,.08);border-radius:10px;padding:8px 0;min-width:120px;box-shadow:0 8px 32px rgba(0,0,0,.12);opacity:0;visibility:hidden;transition:all .25s cubic-bezier(.16,1,.3,1);}
.nav-dropdown a{display:block;padding:10px 20px;font-size:var(--fs-small);color:var(--black);text-decoration:none;transition:background .2s;}
.nav-dropdown a:hover{background:rgba(0,0,0,.04);}
.nav-center li:hover .nav-dropdown{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0);}
.nav-search{background:none;border:none;cursor:pointer;padding:8px;display:flex;align-items:center;}
.nav-search svg{width:20px;height:20px;fill:var(--black);}
.nav-hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:4px;}
.nav-hamburger span{display:block;width:22px;height:2px;background:var(--black);transition:all .3s;}
.nav-hamburger.open span:nth-child(1){transform:translateY(0.5px) rotate(45deg);}
.nav-hamburger.open span:nth-child(2){transform:translateY(-5.5px) rotate(-45deg);}
.mobile-menu{position:absolute;top:100%;left:0;width:100%;background:rgba(242,242,242,0.98);z-index:190;padding:16px 24px 24px;transform:translateY(-110%);opacity:0;transition:transform .4s cubic-bezier(.16,1,.3,1),opacity .3s;}
.mobile-menu.open{transform:translateY(0);opacity:1;}
.mobile-menu ul{list-style:none;}
.mobile-menu li{border-bottom:1px solid rgba(0,0,0,.07);}
.mobile-menu a,.mobile-menu button{display:block;width:100%;padding:14px 0;font-size:15px;font-weight:500;color:var(--black);text-decoration:none;background:none;border:none;cursor:pointer;font-family:'Noto Sans TC',sans-serif;text-align:left;}
.mobile-submenu{padding:0 0 8px 16px;display:none;}
.mobile-submenu.open{display:block;}
.mobile-submenu a{font-size:14px;color:rgba(0,0,0,.6);padding:8px 0;border:none;}

/* ══════════════════════════════
   PAGE TOP WRAPPER (防穿透)
══════════════════════════════ */
.page-top{
  background:var(--black);
}

/* ══════════════════════════════
   GUARANTEE BANNER
══════════════════════════════ */
.guarantee-bar{
  display:block;
  background:var(--yellow);
  padding:48px;
  text-align:center;
  overflow:hidden;
  cursor:pointer;
  text-decoration:none;color:inherit;
}
.guarantee-bar-inner{
  display:inline-flex;align-items:center;justify-content:center;gap:32px;
}
.guarantee-bar-text{
  transition:transform .5s cubic-bezier(.16,1,.3,1);
}
.guarantee-bar:hover .guarantee-bar-text{
  transform:scale(1.04);
}
.guarantee-bar-title{
  font-family:'Bebas Neue',sans-serif;
  font-size:clamp(32px,5vw,64px);
  letter-spacing:3px;
  color:var(--black);
  line-height:1;margin-bottom:8px;
  font-weight:900;
}
.guarantee-bar-desc{
  font-size:var(--fs-small);color:rgba(0,0,0,.6);letter-spacing:.3px;
}
/* hover arrow badge */
.guarantee-arrow-badge{
  flex-shrink:0;
  width:56px;height:56px;
  background:var(--black);
  border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  opacity:0;
  transform:scale(.6) rotate(-10deg);
  transition:opacity .45s cubic-bezier(.16,1,.3,1),transform .45s cubic-bezier(.16,1,.3,1);
}
.guarantee-arrow-badge svg{
  width:24px;height:24px;fill:var(--white);
}
.guarantee-bar:hover .guarantee-arrow-badge{
  opacity:1;
  transform:scale(1) rotate(0deg);
}

/* ══════════════════════════════
   PRODUCT HERO
══════════════════════════════ */
.product-hero{
  max-width:1200px;margin:0 auto;
  padding:80px 48px;
  display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center;
}
/* scroll-reveal */
.sr{opacity:0;transform:translateY(40px);transition:opacity .8s cubic-bezier(.16,1,.3,1),transform .8s cubic-bezier(.16,1,.3,1);}
.sr.sr-left{transform:translateX(-40px);}
.sr.sr-right{transform:translateX(40px);}
.sr.sr-scale{transform:scale(.95);opacity:0;}
.sr.visible{opacity:1;transform:none;}

.product-img-wrap{
  position:relative;
  background:var(--dark-gray);
  border-radius:var(--border-radius-card);
  overflow:hidden;
  aspect-ratio:1/1;
  display:flex;align-items:center;justify-content:center;
}
.product-img-wrap img{
  width:85%;height:85%;object-fit:contain;
  transition:transform .6s cubic-bezier(.16,1,.3,1);
}
.product-img-wrap:hover img{transform:scale(1.04);}

.product-eyebrow{
  font-size:12px;letter-spacing:3px;color:var(--yellow);
  font-weight:500;text-transform:uppercase;
  margin-bottom:12px;display:block;
}
.product-name{
  font-size:clamp(22px,3vw,32px);font-weight:700;
  color:var(--white);margin-bottom:8px;letter-spacing:.5px;
}
.product-price{
  font-family:'Bebas Neue',sans-serif;
  font-size:clamp(36px,5vw,56px);
  color:var(--yellow);letter-spacing:2px;
  margin-bottom:24px;line-height:1;
}

/* 型號 Accordion */
.model-select{
  margin-bottom:28px;
  border:1px solid rgba(255,255,255,.12);
  border-radius:10px;overflow:hidden;
}
.model-select-trigger{
  width:100%;display:flex;align-items:center;justify-content:space-between;
  padding:14px 18px;background:rgba(255,255,255,.04);
  border:none;outline:none;cursor:pointer;color:var(--white);
  font-family:'Noto Sans TC',sans-serif;font-size:var(--fs-small);
  letter-spacing:.5px;transition:background .2s;
}
.model-select-trigger:focus{outline:none;}
.model-select-trigger:hover{background:rgba(255,255,255,.08);}
.model-select-arrow{font-size:10px;transition:transform .3s;}
.model-select.open .model-select-arrow{transform:rotate(180deg);}
.model-select-body{
  display:grid;
  grid-template-rows:0fr;
  transition:grid-template-rows .45s cubic-bezier(.16,1,.3,1);
}
.model-select-body > div{overflow:hidden;}
.model-select.open .model-select-body{grid-template-rows:1fr;}
.model-select-inner{padding:0 18px;}
.model-select-inner p{
  font-size:var(--fs-small);color:rgba(255,255,255,.6);
  padding:8px 0;border-bottom:1px solid rgba(255,255,255,.06);
  letter-spacing:.3px;
}
.model-select-inner p:first-child{padding-top:12px;}
.model-select-inner p:last-child{border-bottom:none;padding-bottom:16px;}

/* 特點清單 */
.product-features{list-style:none;margin-bottom:32px;}
.product-features li{
  padding:5px 0px;border-bottom:1px solid rgba(255,255,255,.06);
  font-size:var(--fs-small);color:var(--white);
  display:flex;align-items:center;gap:10px;letter-spacing:.3px;
}
.product-features li::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--yellow);flex-shrink:0;}

/* 產品簡介 */
.product-intro{margin-bottom:28px;}
.product-info .features-section{margin-bottom:28px;}
.product-intro-title{
  font-size:var(--fs-small);font-weight:700;color:var(--white);
  letter-spacing:.5px;margin-bottom:8px;
}
.product-intro-text{
  font-size:var(--fs-small);color:rgba(255,255,255,.55);
  line-height:var(--lh-body);letter-spacing:.3px;
}

/* CTA 按鈕 */
.product-cta{
  display:inline-flex;align-items:center;gap:10px;
  padding:16px 36px;background:var(--yellow);color:var(--black);
  font-family:'Noto Sans TC',sans-serif;font-size:var(--fs-body);
  font-weight:700;letter-spacing:1px;border-radius:var(--border-radius-btn);
  text-decoration:none;transition:transform .2s,box-shadow .2s;
}
.product-cta:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(255,211,0,.3);}

/* ══════════════════════════════
   SECTION HEADER (共用)
══════════════════════════════ */
.sec-wrap{max-width:1200px;margin:0 auto;padding:0 48px;}
.sec-divider{height:1px;background:rgba(255,255,255,.08);max-width:1200px;margin:0 auto 80px;}
.sec-eyebrow{
  font-size:12px;letter-spacing:3px;color:var(--yellow);
  font-weight:500;text-transform:uppercase;
  margin-bottom:12px;display:block;
}
.sec-title{
  font-family:'Bebas Neue',sans-serif;
  font-size:clamp(36px,5vw,64px);
  letter-spacing:2px;color:var(--white);
  line-height:1;margin-bottom:48px;
}

/* ══════════════════════════════
   COLLAPSIBLE SECTION (共用)
══════════════════════════════ */
.collapse-section .collapse-trigger{
  width:100%;display:flex;align-items:center;justify-content:space-between;
  gap:24px;background:none;border:none;cursor:pointer;padding:0;text-align:left;
  outline:none;
}
.collapse-section .collapse-trigger:focus-visible{
  outline:2px solid var(--yellow);outline-offset:4px;
}
.collapse-arrow{
  font-size:16px;color:var(--yellow);flex-shrink:0;
  transition:transform .3s;
}
.collapse-section.open .collapse-arrow{transform:rotate(180deg);}
.collapse-body{
  display:grid;grid-template-rows:0fr;
  transition:grid-template-rows .45s cubic-bezier(.16,1,.3,1);
}
.collapse-body > div{overflow:hidden;}
.collapse-section.open .collapse-body{grid-template-rows:1fr;}

/* ══════════════════════════════
   PRODUCT DETAIL SECTION
══════════════════════════════ */
.detail-section{padding:100px 0;}
.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.detail-card{
  background:var(--dark-gray);padding:40px 36px;
  border-radius:var(--border-radius-card);
  border:1px solid rgba(255,255,255,.06);
  position:relative;overflow:hidden;
  transition:background .4s,border-color .4s,transform .4s;
}
.detail-card::before{
  content:'';position:absolute;left:0;top:0;
  width:3px;height:0;background:var(--yellow);
  transition:height .5s cubic-bezier(.16,1,.3,1);
  border-radius:0 2px 2px 0;
}
.detail-card:hover{background:#1e1e1e;border-color:rgba(255,211,0,.25);transform:translateY(-4px);}
.detail-card:hover::before{height:100%;}
.detail-num{
  font-family:'Bebas Neue',sans-serif;font-size:48px;line-height:1;
  color:var(--yellow);display:block;margin-bottom:16px;
}
.detail-title{font-size:var(--fs-h3);color:var(--white);font-weight:500;letter-spacing:1px;margin-bottom:10px;}
.detail-tagline{font-size:var(--fs-body);color:var(--yellow);font-weight:700;letter-spacing:.3px;margin-bottom:12px;line-height:1.5;}
.detail-desc{font-size:var(--fs-small);color:var(--mid-gray);line-height:var(--lh-body);}
.detail-card-img{
  display:flex;align-items:center;justify-content:center;padding:0;
}
.detail-img{
  max-width:100%;display:block;margin:0 auto;
}

/* ══════════════════════════════
   VIDEO / GIF SECTION
══════════════════════════════ */
.video-section{
  background:var(--dark-gray);
  padding:100px 0;
  overflow:hidden;
  position:relative;
}
.video-section::before{
  content:'';position:absolute;inset:0;
  background:radial-gradient(ellipse 50% 80% at 50% 50%, rgba(255,211,0,.04) 0%, transparent 70%);
  pointer-events:none;
}
.video-inner{
  max-width:1200px;margin:0 auto;padding:0 48px;
  display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center;
}
.video-frame{
  border-radius:var(--border-radius-card);overflow:hidden;
  position:relative;aspect-ratio:4/3;
  background:var(--black);
}
.video-frame img,.video-frame video{
  width:100%;height:100%;object-fit:cover;display:block;
}

/* ══════════════════════════════
   COMPARE SECTION
══════════════════════════════ */
.compare-section{
  padding:100px 0;
}
.compare-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
}
.compare-card{
  background:var(--dark-gray);
  border-radius:var(--border-radius-card);
  overflow:hidden;
  border:1px solid rgba(255,255,255,.06);
  transition:transform .4s cubic-bezier(.16,1,.3,1),border-color .3s;
}
.compare-card:hover{transform:translateY(-8px);border-color:rgba(255,211,0,.3);}
.compare-card.featured{border-color:var(--yellow);}
.compare-card-img{
  background:#fff;padding:24px;
  display:flex;align-items:center;justify-content:center;
  aspect-ratio:1/1;
}
.compare-card-img img{width:100%;height:100%;object-fit:contain;}
.compare-card-body{padding:20px;}
.compare-card-badge{
  display:inline-block;
  font-size:11px;letter-spacing:2px;font-weight:700;
  padding:3px 10px;border-radius:30px;
  background:var(--yellow);color:var(--black);
  margin-bottom:10px;
}
.compare-card-name{
  font-size:var(--fs-body);font-weight:500;
  color:var(--white);margin-bottom:4px;letter-spacing:.3px;
}
.compare-card-price{
  font-family:'Bebas Neue',sans-serif;
  font-size:22px;letter-spacing:1px;
  color:var(--yellow);margin-bottom:16px;
}
.compare-card-features{list-style:none;}
.compare-card-features li{
  font-size:13px;color:rgba(255,255,255,.5);
  padding:6px 0;border-bottom:1px solid rgba(255,255,255,.05);
  letter-spacing:.3px;
}
.compare-card-features li:last-child{border-bottom:none;}
.compare-card-features li.has{color:rgba(255,255,255,.8);}
.compare-card-features li.has::before{content:'✓  ';}
.compare-card-features li.no{color:rgba(255,255,255,.25);text-decoration:line-through;}
.compare-card-link{
  display:block;margin-top:16px;padding:10px;
  text-align:center;border:1px solid rgba(255,255,255,.2);
  border-radius:var(--border-radius-btn);
  font-size:var(--fs-small);color:rgba(255,255,255,.6);
  text-decoration:none;letter-spacing:.5px;
  transition:all .2s;
}
.compare-card-link:hover{border-color:var(--yellow);color:var(--yellow);}
.compare-card.featured .compare-card-link{
  background:var(--yellow);border-color:var(--yellow);
  color:var(--black);font-weight:700;
}

/* ══════════════════════════════
   FAQ SECTION
══════════════════════════════ */
.faq-product-section{
  background:var(--dark-gray);
  padding:100px 0;
}
.faq-list{display:flex;flex-direction:column;}
.faq-item{border-bottom:1px solid rgba(255,255,255,.08);}
.faq-item:first-child{border-top:1px solid rgba(255,255,255,.08);}
.faq-question{
  width:100%;display:flex;align-items:center;justify-content:space-between;
  padding:24px 0;gap:24px;background:none;border:none;cursor:pointer;text-align:left;
}
.faq-question:hover .faq-q-text{color:var(--yellow);}
.faq-q-text{font-size:var(--fs-body);font-weight:500;color:var(--white);line-height:1.5;letter-spacing:.3px;transition:color .25s;flex:1;}
.faq-icon{flex-shrink:0;width:32px;height:32px;border:1.5px solid rgba(255,255,255,.2);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:300;color:rgba(255,255,255,.5);transition:all .3s cubic-bezier(.16,1,.3,1);line-height:1;}
.faq-item.open .faq-icon{background:var(--yellow);border-color:var(--yellow);color:var(--black);}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .45s cubic-bezier(.16,1,.3,1);}
.faq-item.open .faq-answer{max-height:300px;}
.faq-answer-inner{padding:0 0 28px;font-size:var(--fs-body);color:rgba(255,255,255,.55);line-height:var(--lh-body);letter-spacing:.3px;max-width:760px;}

/* ══════════════════════════════
   KEYWORD TAGS
══════════════════════════════ */
.keyword-section{
  padding:80px 0;
}
.keyword-list{
  display:flex;flex-wrap:wrap;gap:10px;
}
.keyword-tag{
  padding:7px 18px;
  background:rgba(255,211,0,.12);
  border:1px solid rgba(255,211,0,.3);
  border-radius:30px;
  font-size:var(--fs-small);color:var(--yellow);
  text-decoration:none;letter-spacing:.5px;
  transition:all .2s;
}
.keyword-tag:hover{background:rgba(255,211,0,.25);border-color:var(--yellow);}

/* ══════════════════════════════
   FOOTER
══════════════════════════════ */
footer{background:var(--yellow);padding:56px 60px 40px;}
.footer-top{display:flex;gap:80px;flex-wrap:wrap;}
.footer-col-title{font-size:var(--fs-h4);font-weight:700;color:var(--black);margin-bottom:18px;letter-spacing:1px;}
.footer-links{list-style:none;}
.footer-links li{margin-bottom:12px;}
.footer-links a{font-size:var(--fs-body);color:rgba(0,0,0,.65);text-decoration:none;letter-spacing:.5px;transition:color .3s;}
.footer-links a:hover{color:var(--black);}
.footer-social-title{font-size:var(--fs-h4);font-weight:700;color:var(--black);margin-bottom:16px;letter-spacing:1px;}
.footer-social{display:flex;gap:10px;margin-bottom:20px;}
.footer-social a{width:40px;height:40px;border-radius:50%;background:rgba(0,0,0,.08);display:flex;align-items:center;justify-content:center;transition:background .2s;}
.footer-social a img{width:22px;height:22px;object-fit:contain;}
.footer-social a:hover{background:rgba(0,0,0,.75);}
.footer-divider{height:1px;background:rgba(0,0,0,.1);margin:36px 0 20px;}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;}
.footer-copyright{font-size:var(--fs-small);letter-spacing:1px;color:rgba(0,0,0,.4);}

/* ══════════════════════════════
   RWD
══════════════════════════════ */
@media(max-width:900px){
  nav{padding:0 24px;background:rgb(242,242,242);}
  .nav-center{display:none;}
  .nav-search{margin-left:auto;margin-right:16px;}
  .nav-hamburger{display:flex;}

  .guarantee-bar{padding:32px 24px;}
  .guarantee-bar-inner{gap:0;}
  .guarantee-bar-title{font-size:clamp(24px,7vw,36px);letter-spacing:2px;margin-bottom:8px;}
  .guarantee-bar-desc{font-size:13px;}
  .guarantee-arrow-badge{display:none;}
  .product-hero{grid-template-columns:1fr;gap:40px;padding:48px 24px;}
  .product-cta{display:flex;justify-content:center;width:100%;}
  .sec-wrap{padding:0 24px;}
  .detail-section{padding:60px 0;}
  .detail-grid{grid-template-columns:1fr;}
  .video-inner{grid-template-columns:1fr;gap:40px;padding:0 24px;}
  /* 手機版比較區：橫向滑動 */
  .compare-section{padding:60px 0;}
  .compare-section .sec-wrap{padding:0;}
  .compare-section .sec-eyebrow,
  .compare-section .sec-title{padding:0 24px;}
  .compare-grid{
    display:flex;
    flex-wrap:nowrap;
    overflow-x:auto;
    gap:16px;
    padding:0 24px 16px;
    scroll-snap-type:x mandatory;
    -webkit-overflow-scrolling:touch;
    grid-template-columns:unset;
  }
  .compare-grid::-webkit-scrollbar{height:3px;}
  .compare-grid::-webkit-scrollbar-track{background:rgba(255,255,255,.08);border-radius:2px;}
  .compare-grid::-webkit-scrollbar-thumb{background:var(--yellow);border-radius:2px;}
  .compare-grid{padding-bottom:24px;}
  .compare-card{
    flex:0 0 72vw;
    max-width:280px;
    scroll-snap-align:start;
  }
  .faq-product-section .sec-wrap{padding:0 24px;}
  .keyword-section .sec-wrap{padding:0 24px;}
  footer{padding:48px 24px 32px;}
  .footer-top{flex-direction:column;gap:36px;}
  .footer-bottom{flex-direction:column;text-align:center;}
}