/* =========================================================
   SPIRAL STRAINER® — Landing Page Stylesheet
   THREE-M INDUSTRY / スリーエム工業株式会社
   Aesthetic: Engineered-premium, technical-industrial dark
   ========================================================= */

/* ---------- Design Tokens ---------- */
:root{
  --bg:        #0a1322;
  --bg-2:      #0c1828;
  --bg-3:      #102137;
  --panel:     #122642;
  --ink:       #eef4fb;
  --ink-soft:  #c4d2e4;
  --muted:     #8ba0bb;
  --muted-2:   #6e84a1;
  --accent:    #3d8fd1;   /* brand blue */
  --accent-2:  #2e87d6;   /* brighter accent */
  --accent-lt: #7cc0ee;
  --steel:     #c2ccd6;
  --line:      rgba(255,255,255,.085);
  --line-2:    rgba(255,255,255,.14);
  --glow:      rgba(61,143,209,.55);

  --ff-display: "Anton", "Zen Kaku Gothic New", sans-serif;
  --ff-jp:      "Zen Kaku Gothic New", "Noto Sans JP", sans-serif;
  --ff-body:    "Noto Sans JP", "Zen Kaku Gothic New", sans-serif;
  --ff-tech:    "Chakra Petch", "Zen Kaku Gothic New", sans-serif;

  --wrap: 1180px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

/* ---------- Reset ---------- */
*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--ff-body);
  font-weight:400;
  line-height:1.85;
  letter-spacing:.02em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{ display:block; max-width:100%; height:auto; }
a{ color:inherit; text-decoration:none; }
h1,h2,h3,p,dl,dd,dt,figure{ margin:0; }
.wrap{ width:min(var(--wrap), 90vw); margin-inline:auto; }

/* atmospheric base texture */
body::before{
  content:"";
  position:fixed; inset:0; z-index:-2;
  background:
    radial-gradient(120% 80% at 78% -10%, rgba(46,135,214,.16), transparent 55%),
    radial-gradient(90% 60% at 0% 100%, rgba(61,143,209,.10), transparent 60%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  pointer-events:none;
}

/* =========================================================
   HEADER
   ========================================================= */
.site-header{
  position:fixed; inset:0 0 auto 0; z-index:60;
  transition:background .4s var(--ease), border-color .4s var(--ease), backdrop-filter .4s;
  border-bottom:1px solid transparent;
}
.site-header.scrolled{
  background:rgba(8,16,29,.82);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom-color:var(--line);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  height:84px;
}
.brand-logo{ height:50px; width:auto; transition:transform .4s var(--ease); }
.brand:hover .brand-logo{ transform:scale(1.04); }

.nav{ display:flex; align-items:center; gap:34px; }
.nav a{
  font-family:var(--ff-jp); font-weight:500; font-size:.94rem;
  color:var(--ink-soft); letter-spacing:.06em; position:relative;
  transition:color .25s var(--ease);
}
.nav a:not(.nav-cta)::after{
  content:""; position:absolute; left:0; bottom:-6px;
  width:100%; height:1.5px; background:var(--accent-lt);
  transform:scaleX(0); transform-origin:left; transition:transform .3s var(--ease);
}
.nav a:not(.nav-cta):hover{ color:#fff; }
.nav a:not(.nav-cta):hover::after{ transform:scaleX(1); }
.nav-cta{
  padding:11px 22px; border-radius:999px;
  background:linear-gradient(120deg,var(--accent-2),var(--accent));
  color:#fff !important; font-weight:700; letter-spacing:.08em;
  box-shadow:0 6px 20px -8px var(--glow);
  transition:transform .25s var(--ease), box-shadow .25s var(--ease);
}
.nav-cta:hover{ transform:translateY(-2px); box-shadow:0 12px 26px -8px var(--glow); }

.nav-toggle{
  display:none; width:46px; height:46px; border:1px solid var(--line-2);
  background:rgba(255,255,255,.04); border-radius:12px; cursor:pointer;
  flex-direction:column; align-items:center; justify-content:center; gap:5px;
}
.nav-toggle span{ display:block; width:20px; height:2px; background:var(--ink); transition:.3s var(--ease); }
.nav-toggle.is-open span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2){ opacity:0; }
.nav-toggle.is-open span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

/* =========================================================
   HERO
   ========================================================= */
.hero{
  position:relative; min-height:100svh; display:flex; align-items:center;
  padding:140px 0 80px; overflow:hidden;
}
.hero-bg{ position:absolute; inset:0; z-index:0; pointer-events:none; }
.hero-rings{
  position:absolute; top:50%; left:62%; transform:translate(-50%,-50%);
  width:min(1100px,120vw); height:auto; opacity:.5;
}
.hero-rings circle{ fill:none; stroke:rgba(124,192,238,.22); stroke-width:1; }
.hero-glow{
  position:absolute; top:34%; right:8%; width:46vw; height:46vw; max-width:680px; max-height:680px;
  background:radial-gradient(circle, rgba(46,135,214,.30), transparent 62%);
  filter:blur(20px);
}
.hero-spiral{
  position:absolute; top:50%; left:62%; width:520px; height:520px; max-width:60vw; max-height:60vw;
  transform:translate(-50%,-50%);
  background:conic-gradient(from 0deg,
    transparent 0deg, rgba(124,192,238,.12) 60deg, transparent 130deg,
    rgba(124,192,238,.10) 220deg, transparent 300deg);
  border-radius:50%;
  -webkit-mask:radial-gradient(circle, transparent 24%, #000 26%, #000 70%, transparent 72%);
          mask:radial-gradient(circle, transparent 24%, #000 26%, #000 70%, transparent 72%);
  animation:slowspin 70s linear infinite;
}
@keyframes slowspin{ to{ transform:translate(-50%,-50%) rotate(360deg); } }

.hero-inner{
  position:relative; z-index:2;
  display:grid; grid-template-columns:minmax(0,1.04fr) minmax(0,.96fr); align-items:center; gap:48px;
}

/* tags */
.tag-row{ display:flex; gap:12px; align-items:center; margin-bottom:26px;
  opacity:0; transform:translateY(14px); animation:rise .8s var(--ease) .1s forwards; }
.pill{
  font-family:var(--ff-tech); font-size:.74rem; font-weight:600; letter-spacing:.16em;
  padding:7px 15px; border-radius:999px; display:inline-flex; align-items:center; gap:8px;
}
.pill-accent{ background:linear-gradient(120deg,var(--accent-2),var(--accent)); color:#fff;
  box-shadow:0 8px 22px -10px var(--glow); }
.pill-accent .dot{ width:7px; height:7px; border-radius:50%; background:#fff; box-shadow:0 0 0 4px rgba(255,255,255,.25); }
.pill-ghost{ border:1px solid var(--line-2); color:var(--ink-soft); }

.eyebrow{
  display:flex; align-items:center; gap:14px; color:var(--muted);
  font-family:var(--ff-jp); font-weight:500; font-size:.92rem; letter-spacing:.14em; margin-bottom:18px;
  opacity:0; transform:translateY(14px); animation:rise .8s var(--ease) .2s forwards;
}
.eyebrow-en{ font-family:var(--ff-tech); letter-spacing:.22em; color:var(--accent-lt); }
.eyebrow-bar{ width:38px; height:1px; background:var(--line-2); }

/* hero brand lockup: logo mark + eyebrow */
.hero-brand-lockup{
  display:flex; align-items:center; gap:16px; margin-bottom:14px;
  opacity:0; transform:translateY(14px); animation:rise .8s var(--ease) .18s forwards;
}
.hero-mark{
  width:58px; height:58px; flex:none;
  filter:drop-shadow(0 6px 18px rgba(46,135,214,.5));
}
.hero-eyebrow{
  display:flex; align-items:center; gap:14px; color:var(--muted);
  font-family:var(--ff-jp); font-weight:500; font-size:.92rem; letter-spacing:.14em;
}

/* product name — dominant element of the first view */
.hero-product{
  margin-bottom:18px; line-height:1;
  opacity:0; transform:translateY(20px); animation:rise .9s var(--ease) .28s forwards;
}
.hero-product-en{
  display:block;
  font-family:var(--ff-display); font-weight:400;
  font-size:clamp(2.4rem, 5.4vw, 4.6rem); line-height:.95; letter-spacing:.012em;
  background:linear-gradient(150deg,#ffffff 0%, var(--accent-lt) 52%, var(--accent) 100%);
  -webkit-background-clip:text; background-clip:text; color:transparent;
  text-shadow:0 0 60px var(--glow);
  filter:drop-shadow(0 14px 34px rgba(46,135,214,.28));
}
.hero-product-en sup{
  font-size:.26em; -webkit-text-fill-color:var(--accent-lt); color:var(--accent-lt);
  vertical-align:baseline; position:relative; top:-2.85em; left:.05em; line-height:0;
}
.hero-product-jp{
  display:block; margin-top:12px;
  font-family:var(--ff-jp); font-weight:700; color:var(--ink);
  font-size:clamp(1.05rem,2.1vw,1.5rem); letter-spacing:.34em;
}

/* catch copy — supporting tagline */
.hero-catch{
  font-family:var(--ff-jp); font-weight:900; color:var(--ink);
  font-size:clamp(1.5rem, 3.4vw, 2.5rem); line-height:1.28; letter-spacing:.01em;
  margin-bottom:14px;
  opacity:0; transform:translateY(18px); animation:rise .9s var(--ease) .4s forwards;
}
.hero-catch .hl{ position:relative; white-space:nowrap; color:#fff; }
.hero-catch .hl small{ font-size:.42em; font-weight:700; color:var(--accent-lt); letter-spacing:.04em; }
.hero-catch .hl::after{
  content:""; position:absolute; left:-.06em; right:-.06em; bottom:.08em; height:.14em;
  background:linear-gradient(90deg,var(--accent-2),transparent); border-radius:2px; z-index:-1;
}
.hero-catch-accent{
  background:linear-gradient(110deg,#fff 10%,var(--accent-lt) 55%,var(--accent) 100%);
  -webkit-background-clip:text; background-clip:text; color:transparent;
}

.hero-sub{
  font-family:var(--ff-display); font-size:clamp(1.4rem,3vw,2.2rem); letter-spacing:.06em;
  color:var(--accent-lt); margin-bottom:24px; text-shadow:0 6px 30px var(--glow);
  opacity:0; transform:translateY(16px); animation:rise .9s var(--ease) .5s forwards;
}
.hero-lead{
  color:var(--ink-soft); font-size:clamp(.96rem,1.4vw,1.08rem); max-width:30em; line-height:1.95;
  margin-bottom:38px; font-weight:300;
  opacity:0; transform:translateY(16px); animation:rise .9s var(--ease) .6s forwards;
}

.hero-actions{ display:flex; gap:16px; flex-wrap:wrap; margin-bottom:42px;
  opacity:0; transform:translateY(16px); animation:rise .9s var(--ease) .72s forwards; }

.coming-soon{ display:flex; align-items:center; gap:18px; max-width:340px;
  opacity:0; animation:fade 1s var(--ease) 1s forwards; }
.cs-line{ flex:1; height:1px; background:linear-gradient(90deg,transparent,var(--line-2),transparent); }
.cs-text{ font-family:var(--ff-tech); font-weight:600; letter-spacing:.4em; font-size:.82rem; color:var(--muted); }

/* hero visual */
.hero-visual{ position:relative; display:flex; flex-direction:column; align-items:center;
  opacity:0; transform:translateY(24px) scale(.97); animation:rise 1.1s var(--ease) .5s forwards; }
.hero-photo-wrap{ position:relative; width:100%; max-width:560px; }
.hero-photo-wrap::after{
  content:""; position:absolute; left:8%; right:8%; bottom:-6%; height:40px;
  background:radial-gradient(ellipse at center, rgba(0,0,0,.55), transparent 70%); filter:blur(8px);
}
.hero-photo{
  width:100%; border-radius:18px;
  box-shadow:0 50px 90px -40px rgba(0,0,0,.8), 0 0 0 1px var(--line);
  animation:float 7s ease-in-out infinite;
}
@keyframes float{ 0%,100%{ transform:translateY(0); } 50%{ transform:translateY(-12px); } }

/* scroll cue */
.scroll-cue{ position:absolute; left:50%; bottom:26px; transform:translateX(-50%); z-index:3;
  display:flex; flex-direction:column; align-items:center; gap:10px; color:var(--muted);
  font-family:var(--ff-tech); font-size:.66rem; letter-spacing:.32em; }
.scroll-bar{ width:1px; height:46px; background:linear-gradient(180deg,var(--accent-lt),transparent);
  position:relative; overflow:hidden; }
.scroll-bar::after{ content:""; position:absolute; inset:0; background:var(--accent-lt); animation:scrolldrop 2.2s var(--ease) infinite; }
@keyframes scrolldrop{ 0%{ transform:translateY(-100%);} 60%,100%{ transform:translateY(100%);} }

/* =========================================================
   BUTTONS
   ========================================================= */
.btn{
  display:inline-flex; align-items:center; gap:10px;
  font-family:var(--ff-jp); font-weight:700; font-size:.96rem; letter-spacing:.04em;
  padding:15px 30px; border-radius:999px; cursor:pointer;
  transition:transform .28s var(--ease), box-shadow .28s var(--ease), background .28s, border-color .28s;
}
.btn .arrow{ transition:transform .28s var(--ease); }
.btn:hover .arrow{ transform:translateX(5px); }
.btn-primary{ background:linear-gradient(120deg,var(--accent-2),var(--accent)); color:#fff;
  box-shadow:0 14px 30px -12px var(--glow); }
.btn-primary:hover{ transform:translateY(-3px); box-shadow:0 20px 40px -14px var(--glow); }
.btn-ghost{ border:1px solid var(--line-2); color:var(--ink); background:rgba(255,255,255,.02); }
.btn-ghost:hover{ border-color:var(--accent-lt); color:#fff; background:rgba(124,192,238,.08); transform:translateY(-3px); }
.btn-lg{ padding:18px 38px; font-size:1.04rem; }

/* =========================================================
   VALUE STRIP
   ========================================================= */
.value-strip{ border-block:1px solid var(--line); background:rgba(255,255,255,.015); position:relative; z-index:3; }
.value-inner{ display:grid; grid-template-columns:repeat(4,1fr); }
.value-item{
  display:flex; align-items:center; gap:14px; padding:26px 8px;
  font-family:var(--ff-jp); font-weight:500; font-size:1.02rem; color:var(--ink-soft);
  justify-content:center; position:relative;
}
.value-item + .value-item::before{ content:""; position:absolute; left:0; top:24%; height:52%; width:1px; background:var(--line); }
.vnum{ font-family:var(--ff-tech); font-weight:700; color:var(--accent-lt); font-size:1.15rem; letter-spacing:.05em; }

/* =========================================================
   SECTION SHARED
   ========================================================= */
.section{ padding:clamp(80px,12vw,150px) 0; position:relative; }
.kicker{ margin-bottom:18px; }
.kicker-en{
  font-family:var(--ff-tech); font-weight:700; letter-spacing:.34em; font-size:.82rem; color:var(--accent-lt);
  display:inline-flex; align-items:center; gap:14px;
}
.kicker-en::before{ content:""; width:34px; height:2px; background:var(--accent); display:inline-block; }
.section-title{
  font-family:var(--ff-jp); font-weight:900; line-height:1.18;
  font-size:clamp(1.9rem,4.6vw,3.4rem); letter-spacing:.02em; color:var(--ink);
}
.accent-word{ color:var(--accent-lt); }
.section-desc{ color:var(--muted); margin-top:22px; max-width:42em; font-weight:300; line-height:1.95; }

/* reveal animation */
.reveal{ opacity:0; transform:translateY(34px); transition:opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.in{ opacity:1; transform:none; }

/* =========================================================
   CONCEPT
   ========================================================= */
.concept-grid{ display:grid; grid-template-columns:1.4fr 1fr; gap:56px; align-items:center; margin-top:56px; }
.concept-lead{ font-family:var(--ff-jp); font-weight:400; font-size:clamp(1.05rem,1.7vw,1.4rem);
  line-height:2.1; color:var(--ink-soft); }
.concept-lead strong{ color:#fff; font-weight:700; }
.quote-word{ color:var(--accent-lt); font-weight:700; }
.concept-stats{ display:flex; flex-direction:column; gap:18px; }
.stat{ border:1px solid var(--line); border-radius:16px; padding:26px 28px;
  background:linear-gradient(135deg, rgba(18,38,66,.6), rgba(12,24,40,.3));
  display:flex; align-items:center; gap:22px; transition:border-color .3s var(--ease), transform .3s var(--ease); }
.stat:hover{ border-color:var(--line-2); transform:translateX(4px); }
.stat-num{ font-family:var(--ff-display); font-size:clamp(2.4rem,5vw,3.4rem); line-height:1; color:#fff; display:flex; align-items:baseline; }
.stat-num small{ font-family:var(--ff-tech); font-size:.26em; font-weight:600; letter-spacing:.14em; color:var(--accent-lt); margin-left:6px; }
.stat-label{ font-family:var(--ff-jp); font-weight:500; font-size:.94rem; color:var(--muted); line-height:1.6; }

/* =========================================================
   MECHANISM
   ========================================================= */
.mechanism{ background:linear-gradient(180deg, transparent, rgba(255,255,255,.018) 50%, transparent); }
.mech-head{ max-width:760px; }
.mech-figure{ display:grid; grid-template-columns:1.6fr .7fr; gap:36px; align-items:center; margin-top:56px; }
.mech-image-card{
  position:relative; background:#f4f7fb; border-radius:20px; padding:30px 26px 54px;
  box-shadow:0 40px 80px -40px rgba(0,0,0,.7); border:1px solid var(--line);
}
.mech-image-card img{ width:100%; }
.mech-compare-arrow{
  position:absolute; top:42%; left:50%; transform:translate(-50%,-50%);
  width:64px; height:64px; border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  background:linear-gradient(135deg,var(--accent-2),var(--accent));
  color:#fff; box-shadow:0 14px 30px -10px var(--glow), 0 0 0 6px rgba(244,247,251,.9);
  z-index:2;
}
.mech-compare-arrow svg{ width:34px; height:auto; }
.mech-compare-arrow::after{
  content:""; position:absolute; inset:-6px; border-radius:50%;
  border:1px solid var(--accent); opacity:.45; animation:arrowpulse 3.4s var(--ease) infinite;
}
@keyframes arrowpulse{ 0%{ transform:scale(1); opacity:.45;} 70%,100%{ transform:scale(1.4); opacity:0;} }
.mech-callouts{ position:absolute; left:0; right:0; bottom:18px; display:flex; justify-content:space-around; }
.callout{ font-family:var(--ff-jp); font-weight:700; font-size:.82rem; letter-spacing:.05em;
  padding:6px 16px; border-radius:999px; color:#fff; }
.callout-left{ background:#5a6b80; }
.callout-right{ background:linear-gradient(120deg,#e0483b,#c5392d); box-shadow:0 8px 18px -8px rgba(197,57,45,.6); }

.mech-side{ display:flex; flex-direction:column; gap:24px; }
.mech-action{
  border:1px solid var(--accent); border-radius:18px; padding:30px 26px; text-align:center;
  background:linear-gradient(160deg, rgba(46,135,214,.16), rgba(18,38,66,.2));
  position:relative; overflow:hidden;
}
.mech-action::after{ content:""; position:absolute; top:-30px; right:-30px; width:120px; height:120px;
  background:radial-gradient(circle, rgba(124,192,238,.3), transparent 70%); }
.mech-action-icon{ display:block; font-size:2.4rem; color:var(--accent-lt); margin-bottom:10px; line-height:1; }
.mech-action-text{ font-family:var(--ff-jp); font-weight:500; color:var(--ink-soft); font-size:1.06rem; line-height:1.7; }
.mech-action-text strong{ color:#fff; font-weight:900; font-size:1.2rem; }
.mech-note{ font-size:.82rem; color:var(--muted-2); line-height:1.85;
  border-left:2px solid var(--line-2); padding-left:16px; }

/* =========================================================
   FEATURES
   ========================================================= */
.feat-head{ max-width:680px; margin-bottom:60px; }
.feature-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:24px; }
.feature-card{
  position:relative; border:1px solid var(--line); border-radius:20px;
  padding:42px 38px 46px; background:linear-gradient(150deg, rgba(18,38,66,.5), rgba(10,19,34,.25));
  overflow:hidden; transition:transform .4s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
}
.feature-card::before{
  content:""; position:absolute; inset:0; border-radius:20px; padding:1px;
  background:linear-gradient(135deg, var(--accent-lt), transparent 40%);
  -webkit-mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite:xor; mask-composite:exclude; opacity:0; transition:opacity .4s var(--ease);
}
.feature-card:hover{ transform:translateY(-8px); border-color:transparent;
  box-shadow:0 40px 70px -36px rgba(0,0,0,.7); }
.feature-card:hover::before{ opacity:1; }
.feat-index{
  font-family:var(--ff-display); font-size:3.4rem; line-height:.8; letter-spacing:.02em;
  background:linear-gradient(180deg,var(--accent-lt),rgba(124,192,238,.15));
  -webkit-background-clip:text; background-clip:text; color:transparent; display:block; margin-bottom:20px;
}
.feat-title{ font-family:var(--ff-jp); font-weight:900; font-size:1.5rem; margin-bottom:16px; letter-spacing:.02em; }
.feat-body{ color:var(--muted); font-weight:300; line-height:1.95; font-size:.98rem; }

/* =========================================================
   SPECIFICATIONS
   ========================================================= */
.spec{ background:linear-gradient(180deg, transparent, rgba(255,255,255,.02)); }
.spec-inner{ display:grid; grid-template-columns:.9fr 1.1fr; gap:64px; align-items:center; }
.spec-visual{ position:relative; }
.spec-photo-frame{
  border-radius:20px; overflow:hidden; border:1px solid var(--line);
  background:radial-gradient(circle at 50% 30%, rgba(46,135,214,.18), transparent 60%);
  box-shadow:0 40px 80px -40px rgba(0,0,0,.7);
}
.spec-photo-frame img{ width:100%; }

.spec-table{ margin-top:38px; border-top:1px solid var(--line-2); }
.spec-row{ display:grid; grid-template-columns:.85fr 1.15fr; gap:18px; align-items:center;
  padding:24px 4px; border-bottom:1px solid var(--line); transition:background .3s var(--ease); }
.spec-row:hover{ background:rgba(124,192,238,.04); }
.spec-row dt{ font-family:var(--ff-jp); font-weight:700; font-size:1.06rem; color:var(--ink);
  display:flex; flex-direction:column; gap:3px; }
.dt-en{ font-family:var(--ff-tech); font-weight:500; font-size:.7rem; letter-spacing:.16em; color:var(--muted-2); }
.spec-row dd{ font-family:var(--ff-tech); font-weight:600; font-size:1.18rem; color:var(--accent-lt); letter-spacing:.04em; }
.spec-tag{ font-family:var(--ff-tech); font-size:.72rem; font-weight:600; letter-spacing:.1em;
  border:1px solid var(--line-2); color:var(--ink-soft); padding:4px 11px; border-radius:6px; vertical-align:middle; margin-left:6px; }
.spec-plan{ font-family:var(--ff-jp); font-size:.82rem; color:var(--muted); font-weight:500; }
.spec-note{ margin-top:26px; font-size:.82rem; color:var(--muted-2); line-height:1.8; }

/* =========================================================
   DOWNLOAD
   ========================================================= */
.download{ background:linear-gradient(180deg, transparent, rgba(255,255,255,.018)); }
.dl-head{ max-width:680px; margin-bottom:54px; }
.dl-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:24px; }
.dl-grid-single{ grid-template-columns:minmax(0,640px); }
.dl-card{
  position:relative; display:flex; align-items:center; gap:22px;
  padding:30px 30px; border:1px solid var(--line); border-radius:18px;
  background:linear-gradient(150deg, rgba(18,38,66,.5), rgba(10,19,34,.25));
  overflow:hidden; cursor:pointer;
  transition:transform .4s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
}
.dl-card::before{
  content:""; position:absolute; inset:0; border-radius:18px; padding:1px;
  background:linear-gradient(135deg, var(--accent-lt), transparent 45%);
  -webkit-mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite:xor; mask-composite:exclude; opacity:0; transition:opacity .4s var(--ease);
}
.dl-card:hover{ transform:translateY(-6px); border-color:transparent;
  box-shadow:0 34px 64px -34px rgba(0,0,0,.7); }
.dl-card:hover::before{ opacity:1; }
.dl-card:focus-visible{ outline:2px solid var(--accent-lt); outline-offset:3px; }

.dl-icon{
  flex:none; width:60px; height:60px; border-radius:14px;
  display:flex; align-items:center; justify-content:center;
  background:linear-gradient(135deg, rgba(46,135,214,.2), rgba(18,38,66,.4));
  border:1px solid var(--line-2); color:var(--accent-lt);
  transition:background .4s var(--ease), color .4s var(--ease);
}
.dl-icon svg{ width:28px; height:28px; }
.dl-card:hover .dl-icon{ background:linear-gradient(135deg,var(--accent-2),var(--accent)); color:#fff; }

.dl-text{ display:flex; flex-direction:column; gap:5px; flex:1; min-width:0; }
.dl-title{ font-family:var(--ff-jp); font-weight:900; font-size:1.25rem; color:var(--ink); letter-spacing:.02em; }
.dl-sub{ font-family:var(--ff-jp); font-weight:300; font-size:.9rem; color:var(--muted);
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }

.dl-meta{ flex:none; display:flex; align-items:center; gap:16px; }
.dl-format{
  font-family:var(--ff-tech); font-weight:700; font-size:.72rem; letter-spacing:.12em;
  color:var(--ink-soft); border:1px solid var(--line-2); padding:5px 11px; border-radius:7px;
}
.dl-action{
  width:42px; height:42px; border-radius:50%; flex:none;
  display:flex; align-items:center; justify-content:center;
  background:rgba(255,255,255,.04); border:1px solid var(--line-2); color:var(--accent-lt);
  transition:background .35s var(--ease), color .35s var(--ease), transform .35s var(--ease);
}
.dl-action svg{ width:18px; height:18px; }
.dl-card:hover .dl-action{ background:linear-gradient(135deg,var(--accent-2),var(--accent)); color:#fff; transform:translateY(3px); }
.dl-note{ margin-top:26px; font-size:.82rem; color:var(--muted-2); line-height:1.8; }

/* =========================================================
   CTA
   ========================================================= */
.cta{ position:relative; padding:clamp(90px,13vw,160px) 0; overflow:hidden; text-align:center; }
.cta-bg{ position:absolute; inset:0; z-index:0;
  background:
    radial-gradient(60% 80% at 50% 0%, rgba(46,135,214,.28), transparent 60%),
    linear-gradient(180deg, var(--bg-2), var(--bg-3));
  border-top:1px solid var(--line); }
.cta-bg::after{ content:""; position:absolute; inset:0;
  background:conic-gradient(from 200deg at 50% 120%, transparent, rgba(124,192,238,.10), transparent 60%); }
.cta-inner{ position:relative; z-index:2; }
.cta-coming{ font-family:var(--ff-tech); font-weight:700; letter-spacing:.5em; font-size:.9rem; color:var(--accent-lt); margin-bottom:22px; }
.cta-title{ font-family:var(--ff-jp); font-weight:900; font-size:clamp(2rem,5vw,3.6rem); line-height:1.2; color:#fff; }
.cta-lead{ color:var(--ink-soft); margin:24px auto 44px; max-width:36em; font-weight:300; }
.cta-actions{ display:flex; gap:18px; justify-content:center; flex-wrap:wrap; }

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer{ background:#070e1a; border-top:1px solid var(--line); padding-top:72px; }
.footer-inner{ display:grid; grid-template-columns:1fr 1.5fr; gap:54px; padding-bottom:54px; }
.footer-logo{ height:84px; width:auto; margin-bottom:20px; }
.footer-company{ font-family:var(--ff-jp); font-weight:700; font-size:1.1rem; color:var(--ink);
  display:flex; flex-direction:column; gap:4px; }
.footer-company-en{ font-family:var(--ff-tech); font-weight:500; font-size:.74rem; letter-spacing:.22em; color:var(--muted-2); }
.footer-offices{ display:grid; grid-template-columns:repeat(3,1fr); gap:30px; }
.office-name{ font-family:var(--ff-tech); font-weight:700; letter-spacing:.16em; font-size:.78rem;
  color:var(--accent-lt); padding-bottom:12px; margin-bottom:14px; border-bottom:1px solid var(--line); }
.office-addr{ color:var(--muted); font-size:.9rem; font-weight:300; line-height:1.8; }
.office-addr a{ color:var(--ink-soft); border-bottom:1px solid var(--line-2); transition:color .25s; }
.office-addr a:hover{ color:var(--accent-lt); }
.office-tel{ margin-top:14px; font-family:var(--ff-tech); font-weight:600; font-size:1.02rem; color:var(--ink); display:flex; align-items:center; gap:10px; }
.office-tel span{ font-size:.66rem; letter-spacing:.18em; color:var(--muted-2); border:1px solid var(--line-2); padding:3px 8px; border-radius:5px; }

.footer-bar{ border-top:1px solid var(--line); padding:22px 0; }
.footer-bar-inner{ display:flex; justify-content:space-between; align-items:center; gap:16px;
  font-size:.78rem; color:var(--muted-2); letter-spacing:.04em; }
.footer-trademark{ font-family:var(--ff-tech); letter-spacing:.08em; }

/* =========================================================
   ANIMATIONS
   ========================================================= */
@keyframes rise{ to{ opacity:1; transform:none; } }
@keyframes fade{ to{ opacity:1; } }

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width:1080px){
  .hero-inner{ grid-template-columns:1fr 1fr; gap:30px; }
  .concept-grid{ grid-template-columns:1fr; gap:40px; }
  .concept-stats{ flex-direction:row; }
  .stat{ flex:1; }
  .mech-figure{ grid-template-columns:1fr; gap:30px; }
  .spec-inner{ grid-template-columns:1fr; gap:60px; }
  .footer-inner{ grid-template-columns:1fr; gap:40px; }
}

@media (max-width:860px){
  .header-inner{ height:72px; }
  .brand-logo{ height:42px; }
  .nav-toggle{ display:flex; }
  .nav{
    position:absolute; top:72px; left:0; right:0;
    flex-direction:column; align-items:stretch; gap:0;
    background:rgba(8,16,29,.97); backdrop-filter:blur(16px);
    border-bottom:1px solid var(--line); padding:8px 0 18px;
    clip-path:inset(0 0 100% 0); opacity:0; pointer-events:none;
    transition:clip-path .4s var(--ease), opacity .3s var(--ease);
  }
  .nav.open{ clip-path:inset(0 0 0 0); opacity:1; pointer-events:auto; }
  .nav a{ padding:16px 7vw; font-size:1.02rem; }
  .nav a:not(.nav-cta)::after{ display:none; }
  .nav-cta{ margin:12px 7vw 0; text-align:center; justify-content:center; }

  .hero{ padding:120px 0 90px; }
  .hero-inner{ grid-template-columns:1fr; gap:42px; }
  .hero-visual{ order:-1; }
  .hero-photo-wrap{ max-width:420px; }
  .hero-rings,.hero-spiral{ left:50%; opacity:.35; }
  .scroll-cue{ display:none; }
  .mech-compare-arrow{ width:54px; height:54px; }
  .mech-compare-arrow svg{ width:28px; }

  .value-inner{ grid-template-columns:repeat(2,1fr); }
  .value-item + .value-item:nth-child(odd)::before{ display:none; }
  .value-item:nth-child(3), .value-item:nth-child(4){ border-top:1px solid var(--line); }

  .feature-grid{ grid-template-columns:1fr; }
  .dl-grid{ grid-template-columns:1fr; }
  .footer-offices{ grid-template-columns:1fr; gap:24px; }
  .footer-bar-inner{ flex-direction:column; align-items:flex-start; gap:8px; }
}

@media (max-width:600px){
  .hero-product-jp{ letter-spacing:.26em; font-size:1.05rem; }
}

@media (max-width:480px){
  .wrap{ width:90vw; }
  .concept-stats{ flex-direction:column; }
  .hero-actions{ width:100%; }
  .hero-actions .btn{ flex:1; justify-content:center; }
  .hero-product-jp{ letter-spacing:.24em; }
  .hero-catch .hl{ white-space:normal; }
  .mech-compare-arrow{ width:46px; height:46px; box-shadow:0 10px 22px -10px var(--glow), 0 0 0 4px rgba(244,247,251,.9); }
  .mech-compare-arrow svg{ width:24px; }
  .feature-card{ padding:34px 26px 36px; }
  .cta-actions{ width:100%; }
  .cta-actions .btn{ width:100%; justify-content:center; }
  .spec-row{ grid-template-columns:1fr; gap:6px; padding:18px 4px; }
  .dl-card{ padding:22px 20px; gap:16px; }
  .dl-icon{ width:50px; height:50px; }
  .dl-icon svg{ width:24px; height:24px; }
  .dl-format{ display:none; }
}

/* reduced motion */
@media (prefers-reduced-motion:reduce){
  *{ animation:none !important; transition-duration:.01ms !important; }
  .reveal{ opacity:1; transform:none; }
}