*{box-sizing:border-box}
html{scroll-behavior:smooth}
:root{
  --bg:#f3efe8;
  --bg-soft:#faf7f2;
  --paper:#ffffff;
  --ink:#12161d;
  --ink-soft:#5d6672;
  --line:#e5ddd2;
  --line-soft:#ece6dd;
  --dark:#11151c;
  --accent:#b59d78;
  --shadow:0 18px 50px rgba(16,20,28,.08);
  --shadow-lg:0 34px 90px rgba(16,20,28,.12);
  --radius:30px;
  --radius-lg:38px;
  --container:1240px;
}
html,body{margin:0;padding:0}
body{
  font-family:Inter,"PingFang SC","Microsoft YaHei",Arial,sans-serif;
  color:var(--ink);
  line-height:1.7;
  background:
    radial-gradient(circle at top left, rgba(255,255,255,.65), transparent 26%),
    radial-gradient(circle at bottom right, rgba(255,255,255,.38), transparent 22%),
    linear-gradient(180deg, #f6f2eb 0%, #f1ece4 100%);
}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%;height:auto}
button{font:inherit}
.container{width:min(var(--container), calc(100% - 32px));margin:0 auto}
.card-surface{
  background:rgba(255,255,255,.88);
  border:1px solid var(--line);
  box-shadow:var(--shadow-lg);
  border-radius:var(--radius-lg);
  overflow:hidden;
}
.eyebrow{
  display:inline-block;
  font-size:12px;
  font-weight:900;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:#6a7481;
}
.section-head{
  max-width:820px;
  margin:0 0 22px;
}
.section-head.center{
  margin-inline:auto;
  text-align:center;
}
.section-head h2,
.hero-copy h1,
.subhero-copy h1{
  margin:14px 0 14px;
  font-size:clamp(38px,5vw,72px);
  line-height:.95;
  letter-spacing:-.05em;
}
.section-head p,
.hero-copy p,
.subhero-copy p,
.entry-card p,
.product-copy p,
.split-copy p,
.timeline-item p,
.showcase-card p,
.footer-brand p,
.faq-list p{
  margin:0;
  color:var(--ink-soft);
}

.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:rgba(243,239,232,.82);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(18,22,29,.06);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:22px;
  padding:16px 0;
  position:relative;
}
.brand{
  display:flex;
  align-items:center;
  gap:14px;
  min-width:max-content;
}
.brand-mark{
  width:46px;height:46px;
  display:grid;place-items:center;
  border-radius:16px;
  background:#12161d;
  color:#fff;
  font-weight:900;
  font-size:22px;
  box-shadow:0 8px 24px rgba(18,22,29,.18);
}
.brand-text{display:flex;flex-direction:column;gap:4px}
.brand-text strong{font-size:18px;line-height:1}
.brand-text em{font-style:normal;font-size:12px;color:#7a8592;letter-spacing:.08em}
.main-nav{
  display:flex;align-items:center;gap:18px;
  margin-left:auto;
}
.main-nav a{
  font-size:14px;
  font-weight:800;
  color:#45505d;
}
.main-nav a:hover{color:#12161d}
.header-actions{display:flex;gap:10px}
.nav-toggle{
  display:none;
  margin-left:auto;
  background:transparent;
  border:0;
  padding:0;
}
.nav-toggle span{
  display:block;
  width:24px;
  height:2px;
  background:#12161d;
  margin:5px 0;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 18px;
  border-radius:999px;
  border:1px solid transparent;
  font-weight:900;
  cursor:pointer;
  transition:transform .2s ease, background .2s ease, border-color .2s ease, color .2s ease;
}
.btn:hover{transform:translateY(-1px)}
.btn-dark{background:#12161d;color:#fff}
.btn-light{background:#fff;color:#12161d;border-color:#ddd3c5}
.btn-outline{background:transparent;color:#12161d;border-color:#d2c6b5}
.btn-ghost{background:rgba(255,255,255,.72);color:#12161d;border-color:#ded4c7}

.hero{
  padding:46px 0 28px;
}
.hero-grid{
  display:grid;
  grid-template-columns:.96fr 1.04fr;
  gap:32px;
  align-items:center;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin:28px 0 22px;
}
.hero-meta{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:14px;
}
.hero-meta div{
  padding:18px 18px 16px;
  background:rgba(255,255,255,.68);
  border:1px solid var(--line);
  border-radius:22px;
  box-shadow:var(--shadow);
}
.hero-meta strong{
  display:block;
  font-size:28px;
}
.hero-meta span{
  display:block;
  font-size:13px;
  color:#707988;
}
.hero-visual{
  position:relative;
  min-height:620px;
}
.hero-visual img{
  width:100%;
  height:100%;
  min-height:620px;
  object-fit:cover;
}
.hero-badge{
  position:absolute;
  padding:14px 16px;
  background:rgba(255,255,255,.86);
  border:1px solid var(--line);
  border-radius:18px;
  box-shadow:var(--shadow);
  backdrop-filter:blur(10px);
}
.hero-badge span{
  display:block;
  font-size:12px;
  color:#7a8592;
}
.hero-badge strong{
  display:block;
  margin-top:4px;
  font-size:18px;
}
.hero-badge-left{left:22px;bottom:22px}
.hero-badge-right{right:22px;top:22px}

.quick-entry,.value-band,.products,.compare,.download,.guide,.security,.support,.faq,.showcase-grid-wrap{
  padding:28px 0;
}
.entry-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
}
.entry-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px;
  box-shadow:var(--shadow);
  text-align:left;
  cursor:pointer;
}
.entry-card-dark{
  background:#161b22;
  color:#fff;
  border-color:#161b22;
}
.entry-num{
  width:44px;height:44px;
  display:grid;place-items:center;
  border-radius:14px;
  background:#12161d;
  color:#fff;
  font-weight:900;
  margin-bottom:16px;
}
.entry-card-dark .entry-num{
  background:#fff;
  color:#12161d;
}
.entry-card h3,
.value-card h3,
.product-copy h3,
.timeline-item h3,
.showcase-card h2{
  margin:0 0 10px;
  font-size:30px;
  line-height:1.05;
  letter-spacing:-.04em;
}
.entry-card p{margin-bottom:14px}
.entry-card b{word-break:break-all}
.entry-card-dark p{color:rgba(255,255,255,.78)}

.value-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:18px;
}
.value-card{
  padding:26px;
}
.value-card p{color:var(--ink-soft)}

.product-list{
  display:grid;
  gap:18px;
}
.product-panel{
  display:grid;
  grid-template-columns:1fr .92fr;
  gap:18px;
  padding:0;
}
.product-panel.reverse{
  grid-template-columns:.92fr 1fr;
}
.product-panel.reverse .product-copy{order:2}
.product-panel.reverse .product-image{order:1}
.product-copy{
  padding:30px;
  display:flex;
  flex-direction:column;
  justify-content:center;
}
.product-image{
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:360px;
  padding:28px;
  background:linear-gradient(180deg,#faf7f2 0%,#f1ece4 100%);
}
.product-image img{
  width:100%;
  max-width:420px;
  aspect-ratio:1/1;
  object-fit:contain;
}
.product-code{
  display:block;
  font-size:12px;
  font-weight:900;
  letter-spacing:.16em;
  color:#6f7a88;
}
.tag-row{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:16px;
}
.tag-row span,
.support-tags span{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:8px 12px;
  border-radius:999px;
  background:#fbf8f2;
  border:1px solid var(--line);
  font-size:13px;
  color:#18202a;
}

.compare-table{overflow:hidden}
.compare-row{
  display:grid;
  grid-template-columns:1fr 1.45fr 1.2fr 1fr 1.45fr .65fr;
  gap:14px;
  align-items:center;
  padding:16px 20px;
  border-bottom:1px solid var(--line-soft);
}
.compare-row:last-child{border-bottom:0}
.compare-head{
  background:#161b22;
  color:#fff;
}
.table-btn{
  padding:10px 12px;
  border-radius:999px;
  background:#fff;
  border:1px solid #d9cfbf;
  cursor:pointer;
}

.split-grid,
.support-grid,
.subhero-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:32px;
  align-items:center;
}
.split-image img,
.subhero-image img{
  width:100%;
  min-height:420px;
  object-fit:cover;
}
.bullet-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:14px;
  margin:22px 0 24px;
}
.bullet-grid div{
  background:#fff;
  border:1px solid var(--line);
  border-radius:20px;
  padding:15px 16px;
  box-shadow:var(--shadow);
}
.bullet-grid strong{display:block;font-size:15px}
.bullet-grid span{display:block;color:#6a7481;font-size:14px}

.timeline{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
}
.timeline-item{
  padding:24px;
}
.timeline-item b{
  width:46px;height:46px;
  display:grid;place-items:center;
  border-radius:15px;
  background:#12161d;
  color:#fff;
  font-weight:900;
  margin-bottom:16px;
}

.safety-list{
  display:grid;
  gap:14px;
}
.safety-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:22px;
  padding:16px 18px;
  box-shadow:var(--shadow);
}
.safety-item strong{
  display:block;
  font-size:16px;
}
.safety-item p{
  margin:8px 0 0;
  color:var(--ink-soft);
}

.support-grid{grid-template-columns:.95fr 1.05fr}
.support-copy{
  padding:28px;
}
.support-tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.support-actions{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
  margin-top:22px;
}
.support-image img{width:100%;min-height:360px;object-fit:cover}

.faq-wrap{max-width:980px}
.faq-list{
  display:grid;
  gap:14px;
}
.faq-list details{
  background:#fff;
  border:1px solid var(--line);
  border-radius:22px;
  padding:18px 20px;
  box-shadow:var(--shadow);
}
.faq-list summary{
  list-style:none;
  cursor:pointer;
  font-weight:900;
}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list p{margin-top:12px}

.subhero{padding:42px 0 28px}
.showcase-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:18px;
}
.showcase-card{
  padding:26px;
}
.showcase-card strong{
  display:block;
  margin:12px 0 18px;
  word-break:break-all;
}

.site-footer{
  margin-top:22px;
  border-top:1px solid rgba(18,22,29,.08);
}
.footer-grid{
  display:flex;
  justify-content:space-between;
  gap:24px;
  align-items:flex-start;
  padding:28px 0 34px;
}
.footer-brand strong{font-size:24px}
.footer-brand p{max-width:640px;margin-top:8px}
.footer-links{
  display:flex;
  flex-direction:column;
  align-items:flex-end;
  gap:8px;
}
.footer-contact{
  padding:11px 16px;
  border-radius:999px;
  border:1px solid #d6cbba;
  background:#fff;
  cursor:pointer;
}

.contact-modal{
  display:none;
  position:fixed;
  inset:0;
  z-index:120;
  align-items:center;
  justify-content:center;
}
.contact-modal.open{display:flex}
.modal-mask{
  position:absolute;
  inset:0;
  background:rgba(17,21,28,.5);
  backdrop-filter:blur(10px);
}
.modal-panel{
  position:relative;
  z-index:2;
  width:min(460px, calc(100% - 28px));
  background:#fff;
  border:1px solid var(--line);
  border-radius:30px;
  padding:28px;
  box-shadow:0 40px 120px rgba(16,20,28,.24);
  text-align:center;
}
.modal-close{
  position:absolute;
  top:10px;right:14px;
  border:0;background:transparent;
  font-size:34px;
  color:#12161d;
  cursor:pointer;
}
.modal-panel h2{
  margin:0 0 18px;
  font-size:34px;
}
.modal-image{
  border-radius:22px;
  overflow:hidden;
  border:1px solid var(--line);
}
.modal-image img{width:100%}
.modal-links{
  display:flex;
  justify-content:center;
  flex-wrap:wrap;
  gap:10px;
  margin-top:16px;
}
.modal-links a{
  padding:10px 14px;
  border-radius:999px;
  background:#faf7f2;
  border:1px solid var(--line);
}

.float-contact{
  position:fixed;
  right:18px;
  bottom:18px;
  z-index:80;
  padding:14px 18px;
  border:0;
  border-radius:999px;
  background:#12161d;
  color:#fff;
  font-weight:900;
  box-shadow:0 18px 40px rgba(16,20,28,.2);
  cursor:pointer;
}
body.lock{overflow:hidden}

@media (max-width:1180px){
  .main-nav,.header-actions{display:none}
  .nav-toggle{display:block}
  .header-inner.open .main-nav{
    display:flex;
    position:absolute;
    left:12px;
    right:12px;
    top:74px;
    flex-direction:column;
    gap:0;
    background:#fff;
    border:1px solid var(--line);
    border-radius:20px;
    padding:8px;
    box-shadow:var(--shadow-lg);
  }
  .header-inner.open .main-nav a{
    padding:12px 14px;
    border-radius:14px;
  }
  .header-inner.open .header-actions{
    display:flex;
    position:absolute;
    left:12px;
    right:12px;
    top:calc(74px + 7 * 49px + 8px);
    gap:8px;
    background:#fff;
    border:1px solid var(--line);
    border-radius:20px;
    padding:12px;
    box-shadow:var(--shadow-lg);
  }
  .hero-grid,.entry-grid,.value-grid,.split-grid,.support-grid,.subhero-grid,.showcase-grid,.product-panel,.product-panel.reverse{
    grid-template-columns:1fr;
  }
  .product-panel.reverse .product-copy,.product-panel.reverse .product-image{
    order:unset;
  }
  .timeline{grid-template-columns:repeat(2,1fr)}
  .compare-head{display:none}
  .compare-row{
    grid-template-columns:1fr 1fr;
  }
  .footer-grid{
    flex-direction:column;
  }
  .footer-links{
    align-items:flex-start;
  }
}
@media (max-width:760px){
  .container{width:min(var(--container), calc(100% - 24px))}
  .section-head h2,.hero-copy h1,.subhero-copy h1{font-size:42px}
  .hero-actions,.support-actions{flex-direction:column}
  .hero-meta,.bullet-grid,.timeline,.compare-row{grid-template-columns:1fr}
  .btn{width:100%}
  .hero-badge-left,.hero-badge-right{
    position:static;
    margin:12px 0 0;
  }
  .hero-visual{
    min-height:auto;
    display:flex;
    flex-direction:column;
  }
  .hero-visual img{min-height:auto}
  .float-contact{
    right:14px;
    bottom:14px;
  }
}