/* =========================================================
   西区纸箱厂 · Award-grade design system (v2)
   ========================================================= */

:root{
  --paper:      #F4F6F8;   /* 工业冷白底 */
  --paper-2:    #EAEDEF;   /* 次级底 */
  --paper-3:    #DEE3E8;   /* 三级底 */
  --ink:        #16191D;   /* 近黑（冷）*/
  --ink-soft:   #565E68;   /* 次要灰 */
  --ink-faint:  #8A929B;   /* 弱灰 */
  --line:       rgba(22,25,29,.1);
  --clay:       #1E5AA8;   /* 工业蓝 主强调 */
  --clay-deep:  #133F73;   /* 浅底小字 */
  --clay-light: #6FA8DC;   /* 深底强调 */
  --orange:     #E8590C;   /* 工业橙 关键强调 */
  --white:      #FFFFFF;   /* 卡片纯白 */

  --ff-serif: "Noto Serif SC", "Songti SC", serif;
  --ff-sans:  "Noto Sans SC", system-ui, sans-serif;
  --ff-mono:  "Space Grotesk", "Noto Sans SC", monospace;

  --maxw: 1280px;
  --pad: clamp(20px, 5vw, 80px);
  --dur: .6s;
  --ease: cubic-bezier(.22,1,.36,1);
}

*,*::before,*::after{ box-sizing:border-box; margin:0; padding:0; }

html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
@media (prefers-reduced-motion: reduce){ html{ scroll-behavior:auto; } }

body{
  font-family:var(--ff-sans);
  background:var(--paper);
  color:var(--ink);
  line-height:1.7;
  font-weight:400;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  position:relative;
}
body::before{
  content:""; position:fixed; inset:0; pointer-events:none; z-index:1; opacity:.5;
  background-image:radial-gradient(rgba(22, 25, 29, .025) 1px, transparent 1px);
  background-size:3px 3px;
}
::selection{ background:var(--clay); color:var(--paper); }
:focus-visible{ outline:2px solid var(--clay); outline-offset:3px; border-radius:3px; }

img,svg{ display:block; max-width:100%; }
a{ color:inherit; text-decoration:none; }
ul,ol{ list-style:none; }

/* ---------- Typography ---------- */
.kicker{
  font-family:var(--ff-mono);
  font-size:13px; letter-spacing:.22em; text-transform:uppercase;
  color:var(--ink-soft); display:flex; align-items:center; gap:14px;
}
.kicker i{ width:34px; height:1px; background:var(--ink); opacity:.4; display:inline-block; }

h1,h2,h3{ font-family:var(--ff-serif); font-weight:900; line-height:1.08; letter-spacing:-.01em; }

/* ---------- Preloader ---------- */
.preloader{
  position:fixed; inset:0; z-index:200; background:var(--ink);
  display:flex; align-items:center; justify-content:center;
  transition:opacity .8s var(--ease), visibility .8s;
}
.preloader__inner{ text-align:center; color:var(--paper); }
.preloader__mark{
  font-family:var(--ff-serif); font-size:clamp(22px,4vw,34px); font-weight:700; letter-spacing:.1em;
  display:block; margin-bottom:22px; opacity:.9;
}
.preloader__bar{ width:160px; height:2px; background:rgba(245, 247, 250, .2); overflow:hidden; margin:0 auto; }
.preloader__bar i{ display:block; height:100%; width:0; background:var(--clay); transition:width .6s var(--ease); }
body.loaded .preloader{ opacity:0; visibility:hidden; }

/* ---------- Custom cursor ---------- */
.cursor,.cursor-ring{
  position:fixed; top:0; left:0; z-index:150; pointer-events:none; border-radius:50%;
  transform:translate(-50%,-50%); mix-blend-mode:difference; opacity:0;
}
.cursor{ width:7px; height:7px; background:#fff; transition:opacity .3s; }
.cursor-ring{ width:38px; height:38px; border:1px solid #fff; transition:width .25s var(--ease), height .25s var(--ease), opacity .3s; }
body.cursor-on .cursor,body.cursor-on .cursor-ring{ opacity:1; }
body.cursor-on .cursor-ring.is-hover{ width:64px; height:64px; background:rgba(255,255,255,.08); }
@media (hover:none){ .cursor,.cursor-ring{ display:none; } }

/* ---------- Header ---------- */
.site-head{
  position:fixed; top:0; left:0; right:0; z-index:100;
  display:flex; align-items:center; justify-content:space-between;
  padding:18px var(--pad);
  transition:background .4s var(--ease), padding .4s var(--ease), border-color .4s;
  border-bottom:1px solid transparent;
}
.site-head.scrolled{
  background:rgba(245, 247, 250, .82); backdrop-filter:blur(14px);
  padding:12px var(--pad); border-bottom:1px solid var(--line);
}
.brand{ display:flex; align-items:center; gap:11px; font-family:var(--ff-serif); font-weight:700; font-size:18px; white-space:nowrap; }
.brand__mark{
  width:22px; height:22px; flex:none;
  transition:transform .5s var(--ease);
}
.brand:hover .brand__mark{ transform:rotate(8deg) scale(1.05); }
.brand__mark path,.brand__mark circle{ transform-origin:center; }
.nav{ display:flex; align-items:center; gap:clamp(14px,2.4vw,34px); font-size:15px; }
.nav a{ color:var(--ink-soft); position:relative; transition:color .3s; }
.nav a:not(.nav__cta)::after{
  content:""; position:absolute; left:0; bottom:-4px; width:0; height:1.5px; background:var(--ink); transition:width .35s var(--ease);
}
.nav a:not(.nav__cta):hover{ color:var(--ink); }
.nav a:not(.nav__cta):hover::after{ width:100%; }
.nav__cta{
  background:var(--ink); color:var(--paper); padding:9px 18px; border-radius:99px;
  font-size:14px; transition:background .3s, transform .3s var(--ease);
}
.nav__cta:hover{ background:var(--clay); transform:translateY(-1px); }
.nav a.is-active{ color:var(--ink); }
.nav a.is-active::after{ width:100%; }

/* ---------- Scroll progress ---------- */
.scroll-progress{ position:fixed; top:0; left:0; height:3px; width:0; background:var(--clay); z-index:101; }

/* ---------- Mobile nav ---------- */
.nav-toggle{ display:none; flex-direction:column; justify-content:center; align-items:center; gap:5px; width:42px; height:42px; background:transparent; border:0; cursor:pointer; }
.nav-toggle span{ display:block; width:22px; height:2px; background:var(--ink); transition:transform .35s var(--ease), opacity .3s, background .3s; }
body.nav-open .nav-toggle span{ background:var(--paper); }
body.nav-open .nav-toggle span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
body.nav-open .nav-toggle span:nth-child(2){ opacity:0; }
body.nav-open .nav-toggle span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }
.nav-overlay{ position:fixed; inset:0; z-index:99; background:var(--ink); display:flex; align-items:center; justify-content:center; opacity:0; visibility:hidden; transition:opacity .5s var(--ease), visibility .5s; }
body.nav-open .nav-overlay{ opacity:1; visibility:visible; }
.nav-overlay__list{ display:flex; flex-direction:column; gap:6px; text-align:center; }
.nav-overlay__list a{ font-family:var(--ff-serif); font-weight:700; font-size:clamp(28px,8vw,46px); color:var(--paper); padding:12px; transition:color .3s; }
.nav-overlay__list a:hover{ color:var(--clay-light); }
.nav-overlay__cta{ color:var(--clay-light); }

/* ---------- Hero ---------- */
.hero{
  position:relative; min-height:100vh; min-height:100svh; display:flex; flex-direction:column; justify-content:center;
  padding:120px var(--pad) 80px; overflow:hidden;
}
.hero--carousel{ color:var(--paper); }

/* Carousel background */
.hero__carousel{
  position:absolute; inset:0; z-index:0; background:var(--ink);
}
.hero__slide{
  position:absolute; inset:0; opacity:0; visibility:hidden;
  transition:opacity 1s var(--ease), visibility 1s;
}
.hero__slide.is-active{ opacity:1; visibility:visible; }
.hero__slide img{
  width:100%; height:100%; object-fit:cover; object-position:center;
}
.hero__overlay{
  position:absolute; inset:0; z-index:1; pointer-events:none;
  background:
    linear-gradient(90deg, rgba(22,25,29,.82) 0%, rgba(22,25,29,.55) 50%, rgba(22,25,29,.28) 100%),
    linear-gradient(180deg, rgba(22,25,29,.35) 0%, transparent 40%, rgba(22,25,29,.45) 100%);
}

/* Carousel controls */
.hero__arrow{
  position:absolute; top:50%; z-index:3; transform:translateY(-50%);
  width:48px; height:48px; border-radius:50%;
  background:rgba(244,246,248,.12); color:var(--paper); border:1px solid rgba(244,246,248,.25);
  font-size:28px; line-height:1; cursor:pointer; display:flex; align-items:center; justify-content:center;
  transition:background .3s, border-color .3s, transform .3s var(--ease);
}
.hero__arrow:hover{ background:rgba(244,246,248,.25); border-color:rgba(244,246,248,.45); transform:translateY(-50%) scale(1.05); }
.hero__arrow--prev{ left:24px; }
.hero__arrow--next{ right:24px; }
.hero__dots{
  position:absolute; bottom:34px; left:50%; z-index:3; transform:translateX(-50%);
  display:flex; gap:10px;
}
.hero__dots button{
  width:10px; height:10px; border-radius:50%; border:1px solid rgba(244,246,248,.45);
  background:transparent; cursor:pointer; padding:0; transition:background .3s, transform .3s;
}
.hero__dots button.is-active{ background:var(--paper); transform:scale(1.2); border-color:var(--paper); }
.hero__dots button:hover{ background:rgba(244,246,248,.6); }

.hero__content{ position:relative; z-index:2; max-width:920px; will-change:transform; transition:transform .15s linear; }

.hero__title{
  font-size:clamp(42px, 7vw, 92px); margin:22px 0 0; letter-spacing:-.03em; line-height:1.05;
}
.hero__title .line{ display:block; overflow:hidden; padding-bottom:.04em; }
.hero__title .word{ display:inline-block; transform:translateY(110%); transition:transform .9s var(--ease); }
body.loaded .hero__title .word{ transform:translateY(0); }
body.loaded .hero__title .line:nth-child(1) .word{ transition-delay:.15s; }
body.loaded .hero__title .line:nth-child(2) .word{ transition-delay:.30s; }
body.loaded .hero__title .line:nth-child(3) .word{ transition-delay:.45s; }
.hero__title .accent{ color:var(--clay-light); }
.hero--carousel .hero__lead{ max-width:560px; margin:30px 0 0; font-size:clamp(15px,1.6vw,19px); color:rgba(244,246,248,.82); }
.hero--carousel .hero__actions{ display:flex; flex-wrap:wrap; gap:14px; margin-top:34px; }

.hero__scroll{
  position:absolute; bottom:34px; left:var(--pad); z-index:2;
  display:flex; align-items:center; gap:10px; font-family:var(--ff-mono);
  font-size:12px; letter-spacing:.2em; color:rgba(244,246,248,.7);
}
.hero__scroll i{ width:1px; height:34px; background:var(--paper); opacity:.5; animation:scrolly 1.8s var(--ease) infinite; transform-origin:top; }
@keyframes scrolly{ 0%{ transform:scaleY(0); } 50%{ transform:scaleY(1); } 100%{ transform:scaleY(0); transform-origin:bottom; } }

/* Carousel buttons: light on dark */
.hero--carousel .btn--solid{ background:var(--paper); color:var(--ink); border-color:var(--paper); }
.hero--carousel .btn--solid:hover{ background:var(--clay-light); color:var(--ink); border-color:var(--clay-light); transform:translateY(-2px); }
.hero--carousel .btn--ghost{ background:transparent; color:var(--paper); border-color:rgba(244,246,248,.5); }
.hero--carousel .btn--ghost:hover{ background:var(--paper); color:var(--ink); border-color:var(--paper); transform:translateY(-2px); }

/* Kicker light on carousel */
.hero--carousel .kicker{ color:rgba(244,246,248,.85); }
.hero--carousel .kicker i{ background:rgba(244,246,248,.35); }

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:14px 28px; border-radius:99px; font-size:15px; font-weight:500;
  cursor:pointer; border:1px solid transparent; transition:transform .3s var(--ease), background .3s, color .3s, border-color .3s;
}
.btn--solid{ background:var(--ink); color:var(--paper); }
.btn--solid:hover{ background:var(--clay); transform:translateY(-2px); }
.btn--ghost{ border-color:var(--ink); color:var(--ink); }
.btn--ghost:hover{ background:var(--ink); color:var(--paper); transform:translateY(-2px); }

/* ---------- Marquee ---------- */
.marquee{ overflow:hidden; background:var(--ink); color:var(--paper); padding:16px 0; border-top:1px solid var(--ink); }
.marquee__track{ display:flex; gap:26px; white-space:nowrap; width:max-content; animation:scrollx 28s linear infinite; }
.marquee__track span{ font-family:var(--ff-serif); font-size:clamp(18px,2.4vw,28px); font-weight:500; }
.marquee__track i{ color:var(--clay-light); font-style:normal; }
@keyframes scrollx{ to{ transform:translateX(-50%); } }

/* ---------- Section base ---------- */
.section{ padding:clamp(70px,11vw,150px) var(--pad); max-width:var(--maxw); margin:0 auto; position:relative; }
section[id]{ scroll-margin-top:90px; }
.section__head{ display:flex; align-items:baseline; gap:18px; margin-bottom:clamp(36px,5vw,64px); }
.section__idx{ font-family:var(--ff-mono); font-size:14px; color:var(--clay-deep); letter-spacing:.1em; }
.section__title{ font-size:clamp(30px,5.2vw,60px); max-width:14ch; }

/* ---------- Story ---------- */
.story__grid{ display:grid; grid-template-columns:1.1fr 1fr; gap:clamp(30px,5vw,72px); align-items:start; }
.story__text p{ font-size:clamp(15px,1.5vw,18px); color:var(--ink-soft); margin-bottom:18px; }
.story__text strong{ color:var(--ink); font-weight:700; }
.story__note{ font-family:var(--ff-mono); font-size:13px; letter-spacing:.04em; color:var(--ink-faint); border-left:2px solid var(--clay); padding-left:14px; }
.stats{ display:grid; grid-template-columns:1fr 1fr; gap:1px; background:var(--line); border:1px solid var(--line); }
.stat{ background:var(--paper); padding:clamp(22px,3vw,34px); }
.stat__num{ font-family:var(--ff-serif); font-weight:900; font-size:clamp(38px,6vw,68px); line-height:1; color:var(--ink); display:block; }
.stat__label{ display:block; margin-top:10px; font-size:13px; color:var(--ink-soft); letter-spacing:.02em; }

/* ---------- Products ---------- */
.cards{ display:grid; grid-template-columns:repeat(auto-fit,minmax(248px,1fr)); gap:18px; }
.card{
  position:relative; background:var(--white); border:1px solid var(--line); border-radius:14px;
  padding:30px 26px 26px; overflow:hidden; transform-style:preserve-3d;
  transition:border-color .4s, transform .15s var(--ease), box-shadow .4s var(--ease);
}
.card::after{
  content:""; position:absolute; inset:0; background:linear-gradient(135deg, rgba(30, 90, 168, .06), transparent 40%);
  opacity:0; transition:opacity .4s;
}
.card:hover{ border-color:var(--clay); box-shadow:0 24px 50px -28px rgba(22, 25, 29, .4); }
.card:hover::after{ opacity:1; }
.card__icon{ width:46px; height:46px; color:var(--clay); margin-bottom:18px; transition:transform .4s var(--ease); }
.card:hover .card__icon{ transform:translateZ(30px) scale(1.05); }
.card h3{ font-size:21px; margin-bottom:10px; }
.card p{ font-size:14.5px; color:var(--ink-soft); position:relative; z-index:1; }
.card__tag{
  display:inline-block; margin-top:16px; font-family:var(--ff-mono); font-size:11.5px; letter-spacing:.06em;
  color:var(--ink-faint); border:1px solid var(--line); border-radius:99px; padding:4px 12px;
}

/* ---------- Product types (实物展示) ---------- */
.prod-types{ margin-top:clamp(48px, 6vw, 76px); }
.prod-types__head{ text-align:center; max-width:680px; margin:0 auto clamp(30px, 4vw, 42px); }
.prod-types__kicker{ font-family:var(--ff-mono); font-size:12px; letter-spacing:.14em; color:var(--clay); text-transform:uppercase; }
.prod-types__title{ font-size:clamp(22px, 3vw, 30px); margin:12px 0 12px; }
.prod-types__lead{ font-size:15px; color:var(--ink-soft); }
.prod-grid{ display:grid; grid-template-columns:repeat(3, 1fr); gap:18px; }
.prod-gallery__item{
  margin:0; background:var(--white); border:1px solid var(--line); border-radius:14px; overflow:hidden;
  cursor:pointer; transition:border-color .4s, box-shadow .4s var(--ease), transform .4s var(--ease);
}
.prod-gallery__item:hover{ border-color:var(--clay); box-shadow:0 18px 40px -26px rgba(22, 25, 29, .45); transform:translateY(-3px); }
.prod-gallery__media{ aspect-ratio:1/1; overflow:hidden; background:var(--paper-2); }
.prod-gallery__media img{ width:100%; height:100%; object-fit:cover; transition:transform .7s var(--ease); }
.prod-gallery__item:hover .prod-gallery__media img{ transform:scale(1.05); }
.prod-gallery__body{ padding:14px 16px 18px; display:flex; flex-direction:column; gap:3px; }
.prod-gallery__title{ font-family:var(--ff-serif); font-weight:700; font-size:17px; color:var(--ink); }
.prod-gallery__desc{ font-size:13.5px; color:var(--ink-faint); }

/* ---------- Process ---------- */
.steps{ display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--line); border:1px solid var(--line); }
.step{ background:var(--paper); padding:clamp(26px,3vw,38px) clamp(20px,2vw,30px); position:relative; }
.step__no{ font-family:var(--ff-mono); font-size:14px; color:var(--clay-deep); }
.step h3{ font-size:20px; margin:16px 0 10px; }
.step p{ font-size:14px; color:var(--ink-soft); }
.step::before{ content:""; position:absolute; left:clamp(20px,2vw,30px); top:clamp(26px,3vw,38px); width:26px; height:2px; background:var(--clay); transform:scaleX(0); transform-origin:left; transition:transform .5s var(--ease); }
.step:hover::before{ transform:scaleX(1); }

/* ---------- Trust ---------- */
.trust__grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line); }
.trust__item{ background:var(--paper); padding:clamp(26px,3vw,40px); transition:background .4s; }
.trust__item:hover{ background:var(--paper-2); }
.trust__k{ font-family:var(--ff-serif); font-weight:700; font-size:19px; display:block; margin-bottom:12px; position:relative; padding-left:18px; }
.trust__k::before{ content:""; position:absolute; left:0; top:9px; width:8px; height:8px; background:var(--clay); border-radius:2px; }
.trust__item p{ font-size:14.5px; color:var(--ink-soft); }

/* ---------- Factory flow ---------- */
.factory__lead{ max-width:640px; font-size:clamp(15px,1.6vw,18px); color:var(--ink-soft); margin:-18px 0 clamp(36px,5vw,56px); }
.flow{
  display:grid; grid-template-columns:repeat(4,1fr); gap:18px;
}
.flow__item{
  display:flex; flex-direction:column; margin:0;
  background:var(--white); border:1px solid var(--line); border-radius:14px; overflow:hidden;
  cursor:pointer;
  transition:border-color .4s, box-shadow .4s var(--ease), transform .4s var(--ease);
}
.flow__item:hover{ border-color:var(--clay); box-shadow:0 18px 40px -26px rgba(22,25,29,.45); transform:translateY(-3px); }
.flow__media{ position:relative; aspect-ratio:4/3; overflow:hidden; background:var(--paper-2); }
.flow__media img{ width:100%; height:100%; object-fit:cover; transition:transform .7s var(--ease); }
.flow__item:hover .flow__media img{ transform:scale(1.05); }
.flow__step{
  position:absolute; top:10px; left:10px; z-index:2;
  background:var(--clay); color:#fff; font-family:var(--ff-mono); font-size:12px; letter-spacing:.06em;
  padding:3px 10px; border-radius:99px;
}
.flow__body{ padding:14px 16px 18px; display:flex; flex-direction:column; gap:4px; }
.flow__title{ font-family:var(--ff-serif); font-weight:700; font-size:16px; color:var(--ink); }
.flow__desc{ font-size:13px; color:var(--ink-soft); line-height:1.5; }

/* ---------- Lightbox ---------- */
.lightbox{
  position:fixed; inset:0; z-index:300;
  background:rgba(22, 25, 29, .96);
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  opacity:0; visibility:hidden;
  transition:opacity .4s var(--ease), visibility .4s;
  padding:var(--pad);
}
.lightbox.is-open{ opacity:1; visibility:visible; }
.lightbox img{
  max-width:100%; max-height:78vh; object-fit:contain; border-radius:4px;
  box-shadow:0 30px 80px rgba(0,0,0,.5);
  transform:scale(.96); transition:transform .4s var(--ease);
}
.lightbox.is-open img{ transform:scale(1); }
.lightbox img[src=""]{ display:none; }
.lightbox__close{
  position:absolute; top:24px; right:24px; z-index:3;
  width:48px; height:48px; background:transparent;
  border:1px solid rgba(245, 247, 250, .3); color:var(--paper);
  border-radius:50%; font-size:22px; cursor:pointer;
  transition:background .3s, transform .3s var(--ease), border-color .3s;
}
.lightbox__close:hover{ background:var(--clay); border-color:var(--clay); transform:rotate(90deg); }
.lightbox__caption{
  color:var(--paper); margin-top:18px; font-size:15px;
  text-align:center; max-width:600px; line-height:1.5;
}
.lightbox__stage{ margin:0; display:flex; flex-direction:column; align-items:center; max-width:92vw; }
.lightbox__nav{
  position:absolute; top:50%; transform:translateY(-50%); z-index:2;
  width:54px; height:54px; border-radius:50%;
  background:rgba(245, 247, 250, .08); border:1px solid rgba(245, 247, 250, .24); color:var(--paper);
  font-size:30px; line-height:1; cursor:pointer;
  display:flex; align-items:center; justify-content:center;
  transition:background .3s, border-color .3s, transform .3s var(--ease);
}
.lightbox__nav:hover{ background:var(--clay); border-color:var(--clay); }
.lightbox__nav--prev{ left:clamp(12px,4vw,40px); }
.lightbox__nav--next{ right:clamp(12px,4vw,40px); }
.lightbox__nav:hover.lightbox__nav--prev{ transform:translateY(-50%) translateX(-3px); }
.lightbox__nav:hover.lightbox__nav--next{ transform:translateY(-50%) translateX(3px); }
.lightbox__count{
  position:absolute; bottom:24px; left:50%; transform:translateX(-50%); z-index:2;
  font-family:var(--ff-mono); font-size:13px; letter-spacing:.14em; color:var(--ink-faint);
}

/* ---------- Cases ---------- */
.case-list{ border-top:1px solid var(--line); }
.case{ display:grid; grid-template-columns:200px 1fr; gap:24px; align-items:center; padding:26px 4px; border-bottom:1px solid var(--line); transition:padding-left .4s var(--ease); }
.case:hover{ padding-left:14px; }
.case__tag{ font-family:var(--ff-mono); font-size:13px; letter-spacing:.05em; color:var(--clay-deep); }
.case p{ font-size:clamp(15px,1.6vw,18px); color:var(--ink-soft); }

/* ---------- FAQ ---------- */
.faq__list{ border-top:1px solid var(--line); }
.faq__item{ border-bottom:1px solid var(--line); }
.faq__item summary{
  list-style:none; cursor:pointer; padding:24px 0; display:flex; justify-content:space-between; align-items:center;
  font-family:var(--ff-serif); font-weight:700; font-size:clamp(17px,2vw,22px); transition:color .3s;
}
.faq__item summary::-webkit-details-marker{ display:none; }
.faq__item summary:hover{ color:var(--clay-deep); }
.faq__item i{ position:relative; width:18px; height:18px; flex:none; }
.faq__item i::before,.faq__item i::after{ content:""; position:absolute; background:var(--ink); transition:transform .4s var(--ease); }
.faq__item i::before{ top:8px; left:0; width:18px; height:2px; }
.faq__item i::after{ top:0; left:8px; width:2px; height:18px; }
.faq__item[open] i::after{ transform:scaleY(0); }
.faq__item[open] summary{ color:var(--clay-deep); }
.faq__body{ padding:0 0 26px; max-width:680px; color:var(--ink-soft); font-size:15px; }

/* ---------- News ---------- */
.news-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(280px,1fr)); gap:18px; }
.news-card{ background:var(--white); border:1px solid var(--line); border-radius:14px; padding:26px; display:flex; flex-direction:column; gap:12px; transition:transform .4s var(--ease), box-shadow .4s; }
.news-card:hover{ transform:translateY(-4px); box-shadow:0 20px 44px -28px rgba(22, 25, 29, .4); }
.news-card__cat{ font-family:var(--ff-mono); font-size:11.5px; letter-spacing:.08em; color:var(--clay-deep); text-transform:uppercase; }
.news-card__title{ font-family:var(--ff-serif); font-weight:700; font-size:19px; line-height:1.3; }
.news-card__date{ font-size:12.5px; color:var(--ink-faint); margin-top:auto; }
.news__empty{ color:var(--ink-faint); font-size:14px; }

/* ---------- Contact (full-bleed dark) ---------- */
.contact{ background:var(--ink); color:var(--paper); max-width:none; margin:0; }
.contact .section__head, .contact__grid{ max-width:var(--maxw); margin-left:auto; margin-right:auto; }
.contact .section__idx{ color:var(--clay-light); }
.contact .section__title{ color:var(--paper); }
.contact__grid{ display:grid; grid-template-columns:1fr 1fr; gap:clamp(34px,5vw,72px); align-items:start; }
.contact__big{ font-family:var(--ff-serif); font-weight:900; font-size:clamp(40px,8vw,84px); color:var(--paper); display:inline-block; transition:color .3s; }
.contact__big:hover{ color:var(--clay-light); }
.contact__role{ font-family:var(--ff-mono); font-size:13px; letter-spacing:.1em; color:var(--ink-faint); margin:6px 0 30px; }
.contact__list li{ padding:14px 0; border-top:1px solid rgba(245, 247, 250, .14); font-size:15px; color:rgba(245, 247, 250, .78); }
.contact__list span{ display:inline-block; width:64px; color:var(--clay-light); font-family:var(--ff-mono); font-size:12px; letter-spacing:.08em; }
.contact__list a{ color:inherit; text-decoration:underline; text-underline-offset:3px; transition:color .3s; }
.contact__list a:hover{ color:var(--clay-light); text-decoration:none; }
.contact__form{ display:flex; flex-direction:column; gap:14px; }
.contact__form label{ display:flex; flex-direction:column; gap:7px; font-size:13px; color:rgba(245, 247, 250, .6); font-family:var(--ff-mono); letter-spacing:.04em; }
.contact__form input,.contact__form textarea{
  background:rgba(245, 247, 250, .06); border:1px solid rgba(245, 247, 250, .16); border-radius:10px;
  padding:13px 15px; color:var(--paper); font-family:var(--ff-sans); font-size:15px; resize:vertical; transition:border-color .3s, background .3s;
}
.contact__form input:focus,.contact__form textarea:focus{ outline:none; border-color:var(--clay-light); background:rgba(245, 247, 250, .1); }
.contact__form .btn--solid{ align-self:flex-start; margin-top:6px; }
.contact__hint{ font-size:13px; color:var(--ink-faint); min-height:18px; }

/* ---------- Back to top ---------- */
.back-to-top{
  position:fixed; right:24px; bottom:24px; z-index:90;
  width:48px; height:48px; border-radius:50%;
  background:var(--ink); color:var(--paper); border:1px solid rgba(245,247,250,.15);
  display:flex; align-items:center; justify-content:center;
  cursor:pointer; opacity:0; visibility:hidden; transform:translateY(20px);
  transition:opacity .4s var(--ease), visibility .4s, transform .4s var(--ease), background .3s;
  box-shadow:0 8px 24px rgba(22,25,29,.18);
}
.back-to-top.is-visible{ opacity:1; visibility:visible; transform:translateY(0); }
.back-to-top:hover{ background:var(--clay); transform:translateY(-2px); }
.back-to-top svg{ width:22px; height:22px; }
@media (max-width: 560px){ .back-to-top{ right:16px; bottom:16px; width:44px; height:44px; } }

/* ---------- Footer ---------- */
.site-foot{ background:var(--ink); color:var(--paper); padding:0 var(--pad) 40px; border-top:1px solid rgba(245, 247, 250, .14); }
.site-foot__top{ max-width:var(--maxw); margin:0 auto; padding:50px 0 36px; display:flex; align-items:center; gap:18px; flex-wrap:wrap; border-bottom:1px solid rgba(245, 247, 250, .14); }
.site-foot__name{ font-family:var(--ff-serif); font-weight:700; font-size:18px; margin-right:auto; }
.site-foot__nav{ display:flex; gap:22px; font-size:14px; }
.site-foot__nav a{ color:rgba(245, 247, 250, .7); transition:color .3s; }
.site-foot__nav a:hover{ color:var(--clay-light); }
.site-foot__bottom{ max-width:var(--maxw); margin:0 auto; padding-top:24px; display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap; font-size:12.5px; color:var(--ink-faint); }
.site-foot__statement{ max-width:var(--maxw); margin:0 auto; padding:clamp(48px,8vw,96px) 0 clamp(40px,6vw,72px); border-bottom:1px solid rgba(245, 247, 250, .14); }
.site-foot__statement .kicker{ color:var(--ink-faint); margin-bottom:22px; }
.site-foot__claim{ font-family:var(--ff-serif); font-weight:900; font-size:clamp(30px,6.4vw,76px); line-height:1.08; letter-spacing:-.02em; color:var(--paper); max-width:18ch; }
.site-foot__claim em{ font-style:normal; color:var(--clay-light); }

/* ---------- Reveal animation ---------- */
.reveal{ opacity:0; transform:translateY(26px); transition:opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.in{ opacity:1; transform:none; }

/* ---------- Responsive ---------- */
@media (max-width: 900px){
  .nav{ display:none; }
  .nav-toggle{ display:flex; }
  .story__grid{ grid-template-columns:1fr; }
  .steps{ grid-template-columns:1fr 1fr; }
  .trust__grid{ grid-template-columns:1fr 1fr; }
  .contact__grid{ grid-template-columns:1fr; }
  .case{ grid-template-columns:1fr; gap:8px; }
  .flow{ grid-template-columns:repeat(3,1fr); }
  .prod-grid{ grid-template-columns:repeat(3,1fr); gap:14px; }
}
@media (max-width: 560px){
  .stats{ grid-template-columns:1fr; }
  .steps{ grid-template-columns:1fr; }
  .trust__grid{ grid-template-columns:1fr; }
  .hero__box{ opacity:.08; right:-20%; }
  .site-foot__bottom{ flex-direction:column; }
  .flow{ grid-template-columns:repeat(2,1fr); gap:12px; }
  .prod-grid{ grid-template-columns:repeat(2,1fr); gap:12px; }
}

@media (prefers-reduced-motion: reduce){
  *{ animation:none !important; transition:none !important; }
  .reveal{ opacity:1; transform:none; }
  .hero__title .word{ transform:none; }
  .hero__box .draw{ stroke-dashoffset:0; }
}