/* roulang page: index */
:root{
  --c-primary:#0F7A5A;
  --c-primary-dark:#0B5E45;
  --c-primary-deep:#084836;
  --c-secondary:#C97812;
  --c-secondary-dark:#A35F0C;
  --c-accent:#B4532A;
  --c-bg:#F3F5F0;
  --c-card:#FFFaf6;
  --c-dark:#121A16;
  --c-dark-2:#18221C;
  --c-dark-line:#2A3A32;
  --c-dark-text:#E7EFE9;
  --c-text:#1C241F;
  --c-muted:#5C675F;
  --c-line:#D7DDD6;
  --c-input:#C9D2CB;
  --radius:10px;
  --shadow:0 8px 24px rgba(18,26,22,.06);
  --container:1240px;
  --gutter:24px;
  --topbar-h:36px;
  --nav-h:72px;
  --bar-h:62px;
  --font:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:92px}
html,body{margin:0;padding:0}
body{
  font-family:var(--font);
  font-size:17px;
  font-weight:400;
  line-height:1.8;
  color:var(--c-text);
  background:var(--c-bg);
  overflow-x:hidden;
  padding-bottom:calc(var(--bar-h) + 16px);
}
img{max-width:100%;height:auto;display:block}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease,background .2s ease,border-color .2s ease,transform .2s ease}
a:hover{color:var(--c-primary-dark)}
button,input,select,textarea{font-family:inherit;font-size:inherit}
button{cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:650;line-height:1.28;color:var(--c-text);letter-spacing:.01em}
h1{font-size:clamp(28px,4.2vw,46px);font-weight:700}
h2{font-size:clamp(24px,3vw,34px);margin-bottom:16px}
h3{font-size:20px}
p{margin:0 0 .85em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}
.container{width:min(100% - 32px,var(--container));margin:0 auto}
.skip{position:absolute;left:-999px;top:0}
.skip:focus{left:12px;top:12px;background:#fff;padding:8px 12px;z-index:80;outline:2px solid var(--c-secondary)}
.site-header{position:relative;z-index:50}
.topbar{
  height:var(--topbar-h);
  background:var(--c-dark);
  color:#C5D4CB;
  font-size:12px;
  display:flex;
  align-items:center;
  transition:transform .25s ease,opacity .25s ease;
}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;width:min(100% - 32px,var(--container));margin:0 auto}
.topbar a{color:#E7EFE9}
.topbar a:hover{color:#fff}
.topbar-left{display:flex;gap:18px;flex-wrap:wrap;align-items:center}
.topbar-cert{
  border:1px solid #3D5348;
  color:#E7EFE9;
  padding:1px 8px;
  border-radius:4px;
  font-size:11px;
  letter-spacing:.04em;
}
.site-header.is-compact .topbar{transform:translateY(-100%);opacity:0;pointer-events:none}
.nav-main{
  background:var(--c-card);
  border-bottom:1px solid var(--c-line);
  min-height:var(--nav-h);
  display:flex;
  align-items:center;
  position:sticky;
  top:0;
  z-index:48;
}
.site-header.is-compact .nav-main{box-shadow:var(--shadow)}
.nav-inner{width:min(100% - 32px,var(--container));margin:0 auto;display:flex;align-items:center;gap:20px;min-height:var(--nav-h)}
.logo{
  display:flex;align-items:center;gap:10px;color:var(--c-text);flex:0 0 auto;font-weight:700;font-size:18px;line-height:1.2
}
.logo:hover{color:var(--c-primary)}
.logo-mark{
  width:34px;height:34px;border-radius:8px;background:var(--c-primary);color:#fff;
  display:grid;place-items:center;font-size:13px;font-weight:700;letter-spacing:-.04em
}
.logo-text{display:flex;flex-direction:column}
.logo-text small{font-size:11px;font-weight:500;color:var(--c-muted);letter-spacing:.12em}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-links a{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:44px;padding:0 12px;color:var(--c-muted);font-size:15px;font-weight:500;border-radius:8px
}
.nav-links a:hover,.nav-links a.is-active{color:var(--c-primary);background:rgba(15,122,90,.08)}
.nav-cta{margin-left:8px;flex:0 0 auto}
.menu-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--c-line);background:var(--c-card);
  border-radius:8px;padding:0;margin-left:auto;position:relative
}
.menu-toggle span,.menu-toggle::before,.menu-toggle::after{
  content:"";display:block;width:18px;height:2px;background:var(--c-text);margin:0 auto;transition:.2s
}
.menu-toggle span{margin:4px auto}
.menu-toggle.is-open span{opacity:0}
.menu-toggle.is-open::before{transform:translateY(6px) rotate(45deg)}
.menu-toggle.is-open::after{transform:translateY(-6px) rotate(-45deg)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 18px;border-radius:8px;font-weight:600;font-size:15px;border:1px solid transparent;
  transition:background .2s,border-color .2s,color .2s,transform .2s,box-shadow .2s;
}
.btn .arr{transition:transform .2s}
.btn:hover .arr{transform:translateX(1px)}
.btn:focus-visible,.nav-links a:focus-visible,.menu-toggle:focus-visible,.faq-q:focus-visible,.hero-nav:focus-visible{
  outline:2px solid var(--c-secondary);outline-offset:2px
}
.btn-primary{background:var(--c-primary);color:#fff}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff}
.btn-primary:active{background:var(--c-primary-deep);color:#fff}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-ghost:hover{background:rgba(255,255,255,.1);color:#fff;border-color:#fff}
.btn-amber{background:transparent;color:var(--c-secondary);border-color:var(--c-secondary)}
.btn-amber:hover{background:rgba(201,120,18,.1);color:var(--c-secondary-dark);border-color:var(--c-secondary-dark)}
.btn-block{width:100%}
.hero{position:relative;background:var(--c-dark);color:var(--c-dark-text);overflow:hidden}
.hero-track{position:relative;min-height:clamp(560px,62vw,720px);aspect-ratio:16/7.4}
.hero-slide{
  position:absolute;inset:0;opacity:0;visibility:hidden;transition:opacity .55s ease,visibility .55s
}
.hero-slide.is-active{opacity:1;visibility:visible;z-index:1}
.hero-slide img{width:100%;height:100%;object-fit:cover;filter:saturate(.92) contrast(1.05)}
.hero-mask{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(18,26,22,.28) 0%,rgba(18,26,22,.18) 42%,rgba(18,26,22,.82) 100%)
}
.hero-copy{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:0 0 54px;width:min(100% - 32px,var(--container));margin:0 auto
}
.hero-kicker{display:inline-flex;align-items:center;gap:8px;color:#D8E6DC;font-size:13px;font-weight:500;margin-bottom:10px;letter-spacing:.08em}
.hero-kicker i{width:18px;height:1px;background:var(--c-secondary);display:inline-block}
.hero-copy h1,.hero-copy .slide-title{margin-bottom:12px;color:#fff;max-width:18em}
.hero-copy .lead{max-width:46em;font-size:16px;line-height:1.8;color:#D5E2D9;margin-bottom:18px}
.hero-copy .sub{max-width:28em;color:#D5E2D9;font-size:16px;margin-bottom:18px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:16px}
.trust-row{display:flex;flex-wrap:wrap;gap:8px}
.badge{
  display:inline-flex;align-items:center;gap:6px;min-height:28px;padding:0 10px;
  border:1px solid rgba(231,239,233,.28);border-radius:6px;font-size:12px;color:#E7EFE9;background:rgba(18,26,22,.35)
}
.badge b{color:var(--c-secondary);font-weight:700}
.hero-nav{
  position:absolute;top:46%;z-index:3;width:44px;height:44px;border-radius:8px;
  border:1px solid rgba(231,239,233,.25);background:rgba(18,26,22,.45);color:#fff
}
.hero-prev{left:max(12px,calc((100% - var(--container))/2 - 8px))}
.hero-next{right:max(12px,calc((100% - var(--container))/2 - 8px))}
.hero-nav:hover{background:var(--c-primary);border-color:var(--c-primary)}
.hero-progress{position:absolute;left:0;right:0;bottom:0;height:3px;background:#2A3A32;z-index:4}
.hero-progress span{display:block;height:100%;width:0;background:var(--c-primary);transition:width .2s linear}
.section{padding:112px 0;position:relative}
.section-head{margin-bottom:36px;max-width:760px}
.section-head p{color:var(--c-muted);font-size:16px}
.kicker{color:var(--c-accent);font-size:12px;font-weight:600;letter-spacing:.14em;margin-bottom:8px}
.selling{background:var(--c-dark);color:var(--c-dark-text);padding:0}
.selling-grid{display:grid;grid-template-columns:repeat(3,1fr)}
.sell-item{
  display:grid;grid-template-columns:auto 1fr;gap:16px 18px;align-items:start;
  padding:36px 28px;border-right:1px solid var(--c-dark-line);min-height:168px
}
.sell-item:last-child{border-right:0}
.sell-no{font-size:42px;font-weight:700;color:var(--c-secondary);line-height:1;font-variant-numeric:tabular-nums}
.sell-item h3{color:#fff;font-size:20px;margin-bottom:6px}
.sell-item p{color:#C9D6CE;font-size:15px}
.sell-item a{color:var(--c-secondary);font-weight:600;font-size:14px;grid-column:2}
.sell-item a:hover{color:#E39A2A}
.intro{background:var(--c-bg)}
.intro-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:var(--gutter);align-items:stretch}
.intro-pic{border-radius:var(--radius);overflow:hidden;border:1px solid var(--c-line);min-height:420px;background:#dfe6df}
.intro-pic img{width:100%;height:100%;object-fit:cover;min-height:420px}
.intro-body{background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius);padding:36px 32px;box-shadow:var(--shadow)}
.param-list{margin-top:22px;display:grid;gap:12px}
.param{
  display:grid;grid-template-columns:110px 1fr auto;gap:10px;align-items:center;
  padding-bottom:10px;border-bottom:1px dashed var(--c-line);font-size:14px
}
.param span{color:var(--c-muted)}
.param strong{font-weight:650}
.param .val{color:var(--c-primary);font-variant-numeric:tabular-nums;font-weight:700}
.meter{height:6px;background:#E6EBE4;border-radius:99px;overflow:hidden;grid-column:2 / -1}
.meter b{display:block;height:100%;background:linear-gradient(90deg,var(--c-primary),#1A9A72);border-radius:99px}
.tag{display:inline-flex;align-items:center;padding:0 8px;min-height:22px;border-radius:4px;font-size:12px;background:rgba(180,83,42,.1);color:var(--c-accent);font-weight:600}
.adv{background:#EAEFE8}
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gutter)}
.card{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:22px;position:relative;overflow:hidden
}
.card:hover{border-color:#B9C7BE;transform:translateY(-2px)}
.plate-no{position:absolute;left:16px;top:14px;font-size:11px;letter-spacing:.16em;color:var(--c-muted);font-weight:600}
.plate-mark{position:absolute;right:14px;top:12px;font-size:11px;padding:2px 8px;border-radius:4px;background:rgba(201,120,18,.12);color:var(--c-secondary);font-weight:700}
.card h3{margin:28px 0 10px;font-size:18px}
.card p,.card li{color:var(--c-muted);font-size:15px}
.card ul{display:grid;gap:6px;margin-top:8px}
.card li{padding-left:14px;position:relative}
.card li::before{content:"";width:6px;height:6px;border-radius:1px;background:var(--c-primary);position:absolute;left:0;top:.55em}
.card-media{margin:28px -22px -22px;height:150px;overflow:hidden;border-top:1px solid var(--c-line)}
.card-media img{width:100%;height:100%;object-fit:cover}
.card-bar{margin-top:14px}
.bar-row{display:flex;justify-content:space-between;font-size:12px;color:var(--c-muted);margin-bottom:4px}
.card.shift{padding-bottom:0}
.products{background:var(--c-bg)}
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gutter)}
.prod{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column
}
.prod-pic{height:210px;background:#d7ddd6;position:relative}
.prod-pic img{width:100%;height:100%;object-fit:cover}
.prod-body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:12px;flex:1}
.prod h3{font-size:20px}
.spec{width:100%;border-collapse:collapse;font-size:14px}
.spec th,.spec td{padding:7px 0;border-bottom:1px solid var(--c-line);text-align:left}
.spec th{color:var(--c-muted);font-weight:500;width:38%}
.spec td{font-variant-numeric:tabular-nums;font-weight:600}
.scene-tag{font-size:13px;color:var(--c-muted)}
.scenes{background:#E7EBE4;overflow:hidden}
.scene-track{
  display:grid;grid-auto-flow:column;grid-auto-columns:minmax(280px,1fr);gap:16px;overflow-x:auto;
  padding-bottom:8px;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch
}
.scene{
  scroll-snap-align:start;min-height:320px;border-radius:var(--radius);overflow:hidden;position:relative;border:1px solid var(--c-line);color:#fff;display:block
}
.scene img{width:100%;height:100%;object-fit:cover;min-height:320px;position:absolute;inset:0}
.scene-panel{
  position:absolute;left:0;right:0;bottom:0;padding:20px;
  background:linear-gradient(180deg,transparent,rgba(18,26,22,.88) 55%)
}
.scene h3{color:#fff;margin-bottom:6px}
.scene p{color:#D5E2D9;font-size:14px;margin-bottom:10px}
.chip{display:inline-flex;align-items:center;min-height:24px;padding:0 8px;border-radius:4px;background:rgba(15,122,90,.9);color:#fff;font-size:12px;font-weight:600;margin-right:6px;margin-bottom:4px}
.cases{background:var(--c-dark);color:var(--c-dark-text);padding:120px 0;overflow:hidden}
.cases::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.35;
  background-image:linear-gradient(rgba(42,58,50,.7) 1px,transparent 1px),linear-gradient(90deg,rgba(42,58,50,.7) 1px,transparent 1px);
  background-size:48px 48px
}
.cases-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:40px;position:relative}
.cases h2,.cases p,.cases h3{color:var(--c-dark-text)}
.cases .muted{color:#A8B8AF}
.case-item{border:1px solid var(--c-dark-line);padding:20px 22px;margin-bottom:12px;border-radius:8px;background:#161F1A}
.case-item h3{font-size:18px;margin-bottom:8px;color:#fff}
.case-meta{display:flex;flex-wrap:wrap;gap:10px 18px;font-size:14px;color:#C9D6CE}
.case-meta b{color:var(--c-secondary);font-variant-numeric:tabular-nums}
.stories{background:var(--c-bg)}
.story-list{display:grid;gap:24px}
.story{display:grid;grid-template-columns:220px 1fr;gap:28px;background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.story img{width:100%;height:100%;object-fit:cover;min-height:220px}
.story-body{padding:28px 28px 28px 0}
.quote{font-size:18px;line-height:1.75;margin-bottom:14px}
.quote::before{content:"“";color:var(--c-primary);font-size:32px;line-height:0;margin-right:4px}
.story-who{color:var(--c-muted);font-size:14px}
.stats{background:var(--c-primary);color:#fff;padding:56px 0}
.stats-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.stat{border-left:1px solid rgba(255,255,255,.2);padding:8px 8px 8px 18px}
.stat:first-child{border-left:0;padding-left:0}
.stat b{display:block;font-size:34px;line-height:1.1;font-variant-numeric:tabular-nums}
.stat span{display:block;opacity:.86;font-size:13px;margin-top:6px}
.compare{background:var(--c-bg)}
.table-wrap{overflow-x:auto;border:1px solid var(--c-line);border-radius:var(--radius);background:var(--c-card);box-shadow:var(--shadow)}
.compare-table{width:100%;min-width:720px;border-collapse:collapse;font-size:15px}
.compare-table th,.compare-table td{padding:14px 16px;border-bottom:1px solid var(--c-line);text-align:left;vertical-align:top}
.compare-table thead th{background:#E7EEE8;font-weight:650}
.compare-table thead th:last-child{background:var(--c-secondary);color:#fff}
.compare-table td:last-child{background:rgba(201,120,18,.08);font-weight:600;color:var(--c-text)}
.compare-table tr:last-child td{border-bottom:0}
.reviews{background:#EAEFE8}
.review-list{display:grid;gap:0}
.review{
  display:grid;grid-template-columns:210px 1fr;gap:20px;padding:22px 0;
  border-bottom:1px solid var(--c-line)
}
.review:first-child{border-top:1px solid var(--c-line)}
.review-side{font-size:14px;color:var(--c-muted)}
.review-side strong{display:block;color:var(--c-text);font-size:16px}
.review blockquote{margin:0;padding-left:16px;border-left:3px solid var(--c-primary);color:var(--c-text);font-size:16px}
.news{background:var(--c-bg)}
.news-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.news-card{background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius);padding:20px;min-height:190px;display:flex;flex-direction:column}
.news-card time{font-size:12px;color:var(--c-accent);font-variant-numeric:tabular-nums;letter-spacing:.04em}
.news-card h3{font-size:16px;margin:10px 0 8px}
.news-card p{color:var(--c-muted);font-size:14px;flex:1}
.news-more{margin-top:18px}
.process{background:#E7EBE4}
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;counter-reset:step}
.step{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius);padding:20px 18px 22px;position:relative
}
.step::before{
  counter-increment:step;content:counter(step,decimal-leading-zero);
  display:block;font-size:13px;letter-spacing:.14em;color:var(--c-secondary);font-weight:700;margin-bottom:10px
}
.step h3{font-size:17px;margin-bottom:8px}
.step p{font-size:14px;color:var(--c-muted)}
.faq{background:var(--c-bg)}
.faq-list{display:grid;gap:10px;max-width:920px}
.faq-item{background:var(--c-card);border:1px solid var(--c-line);border-left:3px solid var(--c-line);border-radius:0 10px 10px 0}
.faq-item.is-open{border-left-color:var(--c-primary)}
.faq-q{
  width:100%;text-align:left;background:transparent;border:0;padding:16px 48px 16px 18px;
  font-weight:650;color:var(--c-text);position:relative;min-height:52px
}
.faq-q::after{content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);color:var(--c-primary);font-size:20px}
.faq-item.is-open .faq-q::after{content:"–"}
.faq-a{display:none;padding:0 18px 16px;color:var(--c-muted);font-size:16px}
.faq-item.is-open .faq-a{display:block}
.contact{background:var(--c-card);border-top:1px solid var(--c-line)}
.guarantee{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:40px}
.g-item{border:1px solid var(--c-line);border-radius:var(--radius);padding:18px 16px;background:#F7F8F4}
.g-ico{width:36px;height:36px;border-radius:8px;background:var(--c-primary);color:#fff;display:grid;place-items:center;font-weight:700;margin-bottom:10px;font-size:13px}
.g-item h3{font-size:16px;margin-bottom:6px}
.g-item p{font-size:14px;color:var(--c-muted)}
.form-wrap{display:grid;grid-template-columns:1fr 1.1fr;gap:32px;align-items:start}
.form-note{color:var(--c-muted)}
.form{background:#F7F8F4;border:1px solid var(--c-line);border-radius:var(--radius);padding:24px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1 / -1}
.field label{font-size:13px;font-weight:600}
.field input,.field select,.field textarea{
  height:48px;border:1px solid var(--c-input);border-radius:8px;padding:0 12px;background:#fff;color:var(--c-text)
}
.field textarea{height:110px;padding:12px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--c-primary);border-color:var(--c-primary)}
.field.is-err input,.field.is-err select,.field.is-err textarea{border-color:var(--c-accent);outline:2px solid rgba(180,83,42,.25)}
.err{display:none;color:var(--c-accent);font-size:12px}
.field.is-err .err{display:block}
.form-msg{display:none;margin-top:10px;font-size:14px;color:var(--c-primary)}
.form-msg.is-show{display:block}
.cta-end{background:var(--c-dark);color:var(--c-dark-text);padding:88px 0;text-align:left}
.cta-end h2{color:#fff}
.cta-end p{color:#C9D6CE;max-width:46em;margin-bottom:20px}
.cta-contacts{display:flex;flex-wrap:wrap;gap:18px;margin-top:18px;color:#E7EFE9}
.cta-contacts a{color:#fff;font-weight:650}
.site-footer{background:#0E1411;color:#B7C4BC;padding:56px 0 120px;border-top:1px solid var(--c-dark-line);font-size:14px}
.foot-grid{display:grid;grid-template-columns:1.3fr .8fr 1fr .9fr;gap:28px}
.site-footer h3{color:#E7EFE9;font-size:16px;margin-bottom:12px}
.site-footer a{color:#C9D6CE}
.site-footer a:hover{color:#fff}
.foot-brand strong{display:block;color:#fff;font-size:18px;margin-bottom:8px}
.foot-links{display:grid;gap:8px}
.icp{margin-top:28px;padding-top:16px;border-top:1px solid #24332B;display:flex;flex-wrap:wrap;gap:8px 18px;color:#8A978F}
.convert-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:60;
  background:var(--c-dark);color:#E7EFE9;border-top:1px solid var(--c-dark-line);
  transform:translateY(110%);transition:transform .25s ease
}
.convert-bar.is-show{transform:translateY(0)}
.convert-inner{width:min(100% - 16px,var(--container));margin:0 auto;min-height:var(--bar-h);display:flex;align-items:center;gap:10px;justify-content:space-between}
.convert-inner a.tel{color:#fff;font-weight:700;font-variant-numeric:tabular-nums}
.convert-actions{display:flex;gap:8px}
body.is-form-focus .convert-bar{transform:translateY(110%)}
.drawer-mask{display:none}
@media (max-width:1280px){
  .hero-track{aspect-ratio:16/8;min-height:540px}
}
@media (max-width:1024px){
  .section{padding:80px 0}
  .intro-grid,.cases-grid,.form-wrap{grid-template-columns:1fr}
  .adv-grid,.prod-grid,.guarantee,.stats-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid,.steps{grid-template-columns:repeat(2,1fr)}
  .story{grid-template-columns:180px 1fr}
  .review{grid-template-columns:1fr}
  .nav-links a{padding:0 8px;font-size:14px}
  .foot-grid{grid-template-columns:1fr 1fr}
  .hero-copy .lead{font-size:15px}
}
@media (max-width:768px){
  .topbar-left span:nth-child(3){display:none}
  .menu-toggle{display:block}
  .nav-cta{display:none}
  .nav-links{
    position:fixed;top:0;right:0;bottom:0;width:min(82vw,360px);background:var(--c-card);
    flex-direction:column;align-items:stretch;padding:84px 22px 24px;gap:4px;
    transform:translateX(104%);transition:transform .25s ease;box-shadow:-12px 0 32px rgba(18,26,22,.12);z-index:70
  }
  .nav-links.is-open{transform:none}
  .nav-links a{justify-content:flex-start;min-height:48px;font-size:16px;border-bottom:1px solid var(--c-line);border-radius:0}
  .drawer-mask.is-on{display:block;position:fixed;inset:0;background:rgba(18,26,22,.45);z-index:65}
  .hero-track{aspect-ratio:auto;min-height:560px}
  .hero-nav{display:none}
  .selling-grid{grid-template-columns:1fr}
  .sell-item{border-right:0;border-bottom:1px solid var(--c-dark-line)}
  .prod-grid,.adv-grid{grid-template-columns:1fr}
  .story,.intro-grid{grid-template-columns:1fr}
  .story-body{padding:20px}
  .stats-grid,.guarantee,.news-grid,.steps,.form-grid,.foot-grid{grid-template-columns:1fr}
  .stat{border-left:0;border-top:1px solid rgba(255,255,255,.2);padding:16px 0}
  .convert-inner{flex-wrap:wrap;padding:8px 0}
  .convert-actions .btn{min-height:40px;padding:0 12px;font-size:13px}
  .section{padding:64px 0}
  .cta-end,.cases{padding:72px 0}
  .site-footer{padding-bottom:132px}
}
@media (max-width:520px){
  body{font-size:16px}
  .container,.topbar-inner,.nav-inner,.hero-copy,.convert-inner{width:min(100% - 24px,var(--container))}
  .logo-text small{display:none}
  .hero-actions .btn{width:100%}
  .adv-grid{grid-template-columns:1fr}
  h1{font-size:28px}
  .param{grid-template-columns:1fr;gap:4px}
}

/* roulang page: index */
:root {
      --copper: #C4853A;
      --copper-deep: #A36C2C;
      --dawn: #E0B25A;
      --graphite: #3A4148;
      --ink: #1B1E22;
      --green: #1F6F5B;
      --paper: #F3F0E8;
      --mist: #E6E8E6;
      --white: #FFFFFF;
      --text: #22262B;
      --muted: #5C646C;
      --line: #D5D2C8;
      --err: #A6452A;
      --radius: 8px;
      --shadow: 0 4px 8px rgba(27, 30, 34, 0.08);
      --shadow-hard: 0 6px 12px rgba(27, 30, 34, 0.12);
      --space: 88px;
      --gutter: 24px;
      --max: 1240px;
      --nav-h: 64px;
      --top-h: 36px;
      --font: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 86px; }
    body {
      margin: 0;
      font-family: var(--font);
      font-size: 17px;
      line-height: 1.8;
      color: var(--text);
      background: var(--paper);
      letter-spacing: 0.01em;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: var(--copper-deep); text-decoration: none; }
    a:hover { color: var(--copper); }
    button, input, textarea, select { font-family: inherit; }
    button { cursor: pointer; }
    h1, h2, h3, h4 { margin: 0; font-weight: 700; letter-spacing: 0.02em; line-height: 1.28; color: var(--ink); }
    p { margin: 0 0 0.85em; }
    p:last-child { margin-bottom: 0; }
    ul, ol, dl { margin: 0; padding: 0; }
    :focus-visible { outline: 2px solid var(--copper); outline-offset: 2px; }
    .skip-link {
      position: absolute; left: 12px; top: -48px; z-index: 300;
      background: var(--copper); color: var(--ink); padding: 8px 14px; border-radius: 6px;
    }
    .skip-link:focus { top: 8px; color: var(--ink); }
    .container { width: min(100% - 32px, var(--max)); margin: 0 auto; }
    .topbar {
      background: var(--mist); color: var(--graphite); font-size: 13px; line-height: 1.3;
      border-bottom: 1px solid var(--line); height: var(--top-h);
    }
    .topbar-inner {
      width: min(100% - 32px, var(--max)); margin: 0 auto; height: 100%;
      display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 12px;
    }
    .topbar a { color: var(--ink); }
    .topbar a:hover { color: var(--copper-deep); }
    .top-left, .top-right { display: flex; align-items: center; gap: 14px; min-height: 28px; }
    .top-right { justify-content: flex-end; }
    .cert-pills { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
    .cert-pill {
      border: 1px solid var(--graphite); color: var(--graphite); padding: 2px 8px;
      font-size: 12px; letter-spacing: 0.04em; background: transparent; border-radius: 2px;
    }
    .top-scheme { color: var(--copper-deep); font-weight: 600; }
    .site-header {
      background: var(--graphite); color: var(--white); position: sticky; top: 0; z-index: 110;
      box-shadow: 0 4px 8px rgba(27, 30, 34, 0.18);
    }
    .nav-row {
      width: min(100% - 32px, var(--max)); margin: 0 auto; height: var(--nav-h);
      display: flex; align-items: center; gap: 18px;
    }
    .logo {
      display: flex; align-items: center; gap: 10px; color: var(--white); flex-shrink: 0;
    }
    .logo:hover { color: var(--dawn); }
    .logo-mark { width: 34px; height: 34px; display: block; }
    .logo-text { display: flex; flex-direction: column; line-height: 1.15; }
    .logo-text strong { font-size: 15px; font-weight: 700; letter-spacing: 0.06em; }
    .logo-text span { font-size: 11px; color: var(--dawn); letter-spacing: 0.12em; }
    .nav-links { display: flex; align-items: center; gap: 4px; margin-left: auto; list-style: none; }
    .nav-links a {
      color: #E8E4DA; font-size: 14px; padding: 8px 9px; display: inline-flex; align-items: center;
      min-height: 44px; border-bottom: 2px solid transparent; letter-spacing: 0.02em;
    }
    .nav-links a:hover, .nav-links a.is-active { color: var(--white); border-bottom-color: var(--copper); }
    .nav-cta { margin-left: 10px; flex-shrink: 0; }
    .nav-toggle {
      display: none; width: 44px; height: 44px; margin-left: auto; border: 1px solid #6A7178;
      background: transparent; color: var(--white); border-radius: 6px; position: relative;
    }
    .nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
      position: absolute; left: 12px; width: 18px; height: 2px; background: currentColor; content: "";
    }
    .nav-toggle span { top: 21px; }
    .nav-toggle span::before { top: -6px; }
    .nav-toggle span::after { top: 6px; }
    .nav-drawer {
      display: none; position: fixed; inset: calc(var(--top-h) + var(--nav-h)) 0 0 0; z-index: 120;
      background: var(--ink); padding: 18px 20px 32px; overflow: auto;
    }
    body.nav-open .nav-drawer { display: block; }
    body.nav-open { overflow: hidden; }
    .nav-drawer a {
      display: flex; align-items: center; min-height: 48px; color: #E8E4DA;
      border-bottom: 1px solid #2C3238; font-size: 16px;
    }
    .nav-drawer a:hover { color: var(--dawn); }
    .header-compact .topbar { display: none; }
    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 6px;
      min-height: 44px; padding: 0 18px; border-radius: var(--radius); font-size: 14px; font-weight: 600;
      border: 1px solid transparent; transition: background .2s, border-color .2s, transform .2s, color .2s;
      letter-spacing: 0.04em;
    }
    .btn:active { transform: translateY(1px); }
    .btn-primary { background: var(--copper); color: var(--ink); }
    .btn-primary:hover { background: var(--copper-deep); color: var(--white); }
    .btn-ghost { background: transparent; color: var(--white); border-color: #C5C0B6; }
    .btn-ghost:hover { border-color: var(--dawn); color: var(--dawn); }
    .btn-line { background: transparent; color: var(--graphite); border-color: var(--graphite); }
    .btn-line:hover { color: var(--copper-deep); border-color: var(--copper); }
    .btn-dark { background: var(--ink); color: var(--white); }
    .btn-dark:hover { background: #101215; color: var(--dawn); }
    .hero { position: relative; min-height: min(86vh, 780px); background: var(--ink); color: var(--white); overflow: hidden; }
    .hero-slides { position: absolute; inset: 0; }
    .hero-slide { position: absolute; inset: 0; opacity: 0; transition: opacity .6s ease; }
    .hero-slide.is-on { opacity: 1; z-index: 1; }
    .hero-slide img { width: 100%; height: 100%; object-fit: cover; }
    .hero-mask {
      position: absolute; inset: 0;
      background: linear-gradient(90deg, rgba(27,30,34,.86) 0%, rgba(27,30,34,.55) 48%, rgba(27,30,34,.28) 100%);
    }
    .hero-grid {
      position: relative; z-index: 2; width: min(100% - 32px, var(--max)); margin: 0 auto;
      min-height: min(86vh, 780px); display: grid; grid-template-columns: 1.15fr .85fr;
      gap: 36px; align-items: center; padding: 54px 0 92px;
    }
    .kicker { color: var(--dawn); font-size: 13px; letter-spacing: 0.18em; margin-bottom: 12px; }
    .hero h1, .hero .slide-title {
      font-size: clamp(30px, 4.4vw, 46px); color: var(--white); margin-bottom: 16px; max-width: 16em;
    }
    .hero-lead { font-size: 16px; line-height: 1.85; color: #E6E2D8; max-width: 38em; margin-bottom: 22px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 10px; }
    .hero-copy[hidden] { display: none !important; }
    .hero-book {
      background: var(--paper); color: var(--text); border-radius: var(--radius);
      padding: 22px 22px 18px; box-shadow: var(--shadow-hard); border-top: 3px solid var(--copper);
    }
    .hero-book h2 { font-size: 18px; margin-bottom: 8px; }
    .hero-book p { font-size: 14px; color: var(--muted); line-height: 1.7; margin-bottom: 14px; }
    .slot-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 14px; }
    .slot {
      min-height: 52px; border: 1px solid var(--line); background: var(--white); color: var(--ink);
      border-radius: 6px; text-align: left; padding: 8px 10px; font-size: 13px; line-height: 1.35;
    }
    .slot small { display: block; color: var(--muted); font-size: 12px; }
    .slot.is-on, .slot[aria-pressed="true"] { border-color: var(--copper); box-shadow: inset 0 0 0 1px var(--copper); }
    .hero-book .btn { width: 100%; }
    .hero-ctrl {
      position: absolute; z-index: 3; left: 0; right: 0; bottom: 78px;
      width: min(100% - 32px, var(--max)); margin: 0 auto;
      display: flex; align-items: center; gap: 10px;
    }
    .hero-arrow, .hero-pause {
      width: 44px; height: 44px; border-radius: 6px; border: 1px solid rgba(224,178,90,.55);
      background: rgba(27,30,34,.45); color: var(--white);
    }
    .hero-arrow:hover, .hero-pause:hover { border-color: var(--dawn); color: var(--dawn); }
    .hero-dots { display: flex; gap: 6px; margin-left: 8px; }
    .hero-dots button {
      width: 28px; height: 4px; border: 0; background: rgba(255,255,255,.35); border-radius: 1px; padding: 0;
    }
    .hero-dots button.is-on { background: var(--dawn); }
    .proof {
      position: relative; z-index: 4; margin-top: -48px; margin-bottom: 8px;
    }
    .proof-row {
      display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px;
      background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
      box-shadow: var(--shadow); padding: 16px 8px;
    }
    .proof-item { text-align: center; padding: 4px 10px; border-right: 1px solid var(--mist); }
    .proof-item:last-child { border-right: 0; }
    .proof-item strong { display: block; color: var(--copper); font-size: 18px; }
    .proof-item span { font-size: 13px; color: var(--muted); }
    main { padding-bottom: 88px; }
    .section { padding: var(--space) 0; }
    .section-alt { background: var(--white); }
    .section-mist { background: var(--mist); }
    .section-head { max-width: 42em; margin-bottom: 36px; }
    .section-head h2 { font-size: clamp(22px, 2.4vw, 30px); margin-bottom: 12px; }
    .section-head h2::before {
      content: ""; display: block; width: 36px; height: 2px; background: var(--copper); margin-bottom: 14px;
    }
    .section-head p { color: var(--muted); font-size: 16px; line-height: 1.85; }
    .steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-top: 1px solid var(--line); }
    .step { padding: 28px 24px 8px 0; border-right: 1px solid var(--line); }
    .step:last-child { border-right: 0; padding-right: 0; }
    .step-no { font-size: 13px; color: var(--copper); letter-spacing: 0.16em; font-weight: 700; }
    .step h3 { font-size: 20px; margin: 8px 0 10px; }
    .step p { color: var(--muted); font-size: 15px; line-height: 1.75; min-height: 3.4em; }
    .step a { font-size: 14px; font-weight: 600; color: var(--copper-deep); }
    .split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
    .split-media { position: relative; }
    .split-media img { width: 100%; height: 420px; object-fit: cover; border-radius: var(--radius); box-shadow: var(--shadow); }
    .param-bar {
      display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line);
      margin-top: 18px; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
    }
    .param-bar div { background: var(--paper); padding: 12px 10px; }
    .param-bar dt { font-size: 12px; color: var(--muted); }
    .param-bar dd { margin: 0; font-size: 15px; font-weight: 600; color: var(--ink); }
    .check-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 28px; align-items: start; }
    .check-list { list-style: none; display: grid; gap: 10px; }
    .check-list li {
      background: var(--white); border: 1px solid var(--line); border-left: 3px solid var(--copper);
      border-radius: 6px; padding: 14px 16px; min-height: 64px;
    }
    .check-list strong { display: block; font-size: 16px; }
    .check-list span { font-size: 14px; color: var(--muted); }
    .check-note {
      background: var(--ink); color: #E8E4DA; padding: 28px 24px; border-radius: var(--radius);
    }
    .check-note h3 { color: var(--dawn); font-size: 18px; margin-bottom: 10px; }
    .check-note p { color: #C9C4B8; font-size: 15px; line-height: 1.85; }
    .scene-tabs { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 8px; margin-bottom: 16px; }
    .scene-tabs button {
      flex: 0 0 auto; min-height: 44px; padding: 8px 14px; border-radius: 6px;
      border: 1px solid var(--line); background: var(--white); color: var(--graphite); font-size: 14px;
    }
    .scene-tabs button.is-on { background: var(--graphite); color: var(--white); border-color: var(--graphite); }
    .scene-stage { position: relative; border-radius: var(--radius); overflow: hidden; min-height: 420px; }
    .scene-panel { display: none; position: relative; }
    .scene-panel.is-on { display: block; }
    .scene-panel img { width: 100%; height: 460px; object-fit: cover; }
    .scene-cap {
      position: absolute; left: 16px; right: 16px; bottom: 16px;
      background: rgba(27,30,34,.88); color: #F3F0E8; padding: 16px 18px; border-radius: 6px;
      border-left: 3px solid var(--copper);
    }
    .scene-cap h3 { color: var(--white); font-size: 18px; margin-bottom: 6px; }
    .scene-cap p { color: #D8D3C8; font-size: 14px; line-height: 1.7; }
    .bento {
      display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
      grid-template-areas:
        "a a b c"
        "d e e f";
    }
    .bento-card {
      background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
      overflow: hidden; box-shadow: var(--shadow); transition: transform .2s, border-color .2s;
      display: flex; flex-direction: column; min-height: 220px;
    }
    .bento-card:hover { transform: translateY(-2px); border-color: var(--copper); }
    .bento-card img { width: 100%; height: 128px; object-fit: cover; }
    .bento-card .body { padding: 14px 16px 16px; }
    .bento-card h3 { font-size: 17px; margin-bottom: 6px; }
    .bento-card p { font-size: 14px; color: var(--muted); line-height: 1.7; }
    .bento-card--wide img { height: 168px; }
    .a { grid-area: a; } .b { grid-area: b; } .c { grid-area: c; }
    .d { grid-area: d; } .e { grid-area: e; } .f { grid-area: f; }
    .product-stage { display: grid; grid-template-columns: 1.35fr .65fr; gap: 16px; }
    .product-lead {
      display: grid; grid-template-columns: 1fr 1fr; background: var(--white);
      border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
    }
    .product-lead img { width: 100%; height: 100%; min-height: 280px; object-fit: cover; }
    .product-lead .body { padding: 22px 22px 18px; }
    .product-lead h3 { font-size: 22px; margin: 6px 0 8px; }
    .tag {
      display: inline-block; font-size: 12px; letter-spacing: 0.08em; color: var(--green);
      border: 1px solid var(--green); padding: 2px 8px; border-radius: 2px;
    }
    .spec { margin: 12px 0 16px; }
    .spec div { display: flex; justify-content: space-between; gap: 12px; font-size: 14px; padding: 6px 0; border-bottom: 1px dashed var(--line); }
    .spec dt { color: var(--muted); }
    .spec dd { margin: 0; font-weight: 600; }
    .product-side { display: grid; gap: 16px; }
    .spec-card {
      background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
      padding: 16px; box-shadow: var(--shadow); transition: transform .2s, border-color .2s;
    }
    .spec-card:hover { transform: translateY(-2px); border-color: var(--copper); }
    .spec-card img { width: 100%; height: 120px; object-fit: cover; border-radius: 6px; margin-bottom: 10px; }
    .spec-card h3 { font-size: 17px; margin-bottom: 6px; }
    .spec-card p { font-size: 14px; color: var(--muted); margin-bottom: 10px; }
    .table-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); }
    table.sheet { width: 100%; min-width: 720px; border-collapse: collapse; font-size: 14px; }
    .sheet th { background: var(--graphite); color: var(--white); font-weight: 600; text-align: left; padding: 12px 14px; }
    .sheet td { padding: 12px 14px; border-bottom: 1px solid var(--mist); }
    .sheet tr:nth-child(even) td { background: #F7F5EF; }
    .badge-wall { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 22px; }
    .badge {
      border: 1px solid var(--graphite); border-radius: 4px; padding: 16px 12px; text-align: center; background: var(--white);
    }
    .badge strong { display: block; color: var(--green); font-size: 15px; letter-spacing: 0.04em; }
    .badge span { font-size: 13px; color: var(--muted); }
    .batch-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 28px; }
    .progress-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; margin-bottom: 12px; }
    .progress-card h3 { font-size: 16px; margin-bottom: 8px; }
    .bar { height: 8px; background: var(--mist); border-radius: 4px; overflow: hidden; }
    .bar > span { display: block; height: 100%; background: var(--copper); }
    .progress-card p { font-size: 13px; color: var(--muted); margin-top: 8px; }
    .tiers { display: grid; grid-template-columns: 1fr 1.15fr 1fr; gap: 12px; margin-top: 8px; }
    .tier { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 16px; }
    .tier-rec { border-color: var(--copper); box-shadow: var(--shadow); transform: translateY(-4px); }
    .tier h3 { font-size: 16px; margin-bottom: 8px; }
    .tier ul { list-style: none; font-size: 14px; color: var(--muted); }
    .tier li { padding: 4px 0 4px 14px; position: relative; }
    .tier li::before { content: ""; width: 6px; height: 6px; background: var(--copper); position: absolute; left: 0; top: 11px; border-radius: 1px; }
    .dark-case {
      position: relative; color: #E8E4DA; padding: 96px 0;
      background: #1B1E22 center/cover no-repeat;
    }
    .dark-case::before {
      content: ""; position: absolute; inset: 0; background: rgba(27,30,34,.82);
    }
    .dark-case .container { position: relative; z-index: 1; display: grid; grid-template-columns: .9fr 1.1fr; gap: 40px; }
    .dark-case h2 { color: var(--white); }
    .dark-case h2::before { background: var(--dawn); }
    .dark-case .section-head p { color: #C9C4B8; }
    .case-slices { display: grid; gap: 12px; }
    .case-slices article {
      border: 1px solid #3A4148; padding: 16px 18px; border-radius: 6px; background: rgba(27,30,34,.55);
    }
    .case-slices h3 { color: var(--dawn); font-size: 16px; margin-bottom: 6px; }
    .case-slices p { color: #D4CFC4; font-size: 14px; line-height: 1.75; }
    .story { display: grid; grid-template-columns: 1fr 1fr; gap: 0; }
    .story article { display: grid; grid-template-columns: 1fr 1fr; min-height: 320px; }
    .story article:nth-child(2) { direction: rtl; }
    .story article:nth-child(2) > * { direction: ltr; }
    .story img { width: 100%; height: 100%; object-fit: cover; min-height: 280px; }
    .story .body { padding: 36px 28px; background: var(--white); display: flex; flex-direction: column; justify-content: center; }
    .story h3 { font-size: 20px; margin-bottom: 10px; }
    .story p { color: var(--muted); font-size: 15px; line-height: 1.85; }
    .stats { display: grid; grid-template-columns: repeat(6, 1fr); gap: 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .stat { padding: 28px 12px; text-align: center; border-right: 1px solid var(--line); }
    .stat:last-child { border-right: 0; }
    .stat strong { display: block; font-size: 28px; color: var(--copper); font-weight: 700; }
    .stat span { font-size: 13px; color: var(--muted); }
    .compare { display: grid; grid-template-columns: 1fr 1fr; gap: 0; overflow: hidden; border-radius: var(--radius); border: 1px solid var(--line); }
    .compare-col { padding: 28px 24px; }
    .compare-col h3 { font-size: 18px; margin-bottom: 12px; }
    .compare-col ul { list-style: none; }
    .compare-col li { padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 15px; color: var(--muted); }
    .compare-col li strong { display: block; color: var(--ink); font-size: 14px; }
    .ours { background: var(--ink); color: #E8E4DA; }
    .ours h3 { color: var(--dawn); }
    .ours li { border-bottom-color: #343A40; color: #C9C4B8; }
    .ours li strong { color: var(--white); }
    .quotes { display: grid; gap: 12px; }
    .quote {
      background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow);
      border-left: 3px solid var(--copper); padding: 18px 20px;
    }
    .quote p { font-size: 15px; line-height: 1.8; margin-bottom: 8px; }
    .quote cite { font-style: normal; font-size: 13px; color: var(--muted); }
    .news-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 14px; }
    .news-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); display: flex; flex-direction: column; }
    .news-card img { width: 100%; height: 180px; object-fit: cover; }
    .news-card .body { padding: 16px; flex: 1; display: flex; flex-direction: column; }
    .news-card h3 { font-size: 17px; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
    .news-card p { font-size: 14px; color: var(--muted); line-height: 1.7; }
    .news-card a { margin-top: auto; font-size: 14px; font-weight: 600; }
    .faq-item { border: 1px solid var(--line); border-radius: 6px; overflow: hidden; margin-bottom: 8px; }
    .faq-item button {
      width: 100%; text-align: left; min-height: 52px; padding: 12px 48px 12px 16px;
      background: var(--graphite); color: var(--white); border: 0; font-size: 16px; position: relative;
    }
    .faq-item button::after {
      content: "+"; position: absolute; right: 16px; top: 50%; transform: translateY(-50%);
      color: var(--dawn); font-size: 20px;
    }
    .faq-item button[aria-expanded="true"]::after { content: "–"; color: var(--copper); }
    .faq-item .panel { background: var(--white); padding: 16px 18px 18px; color: var(--muted); font-size: 15px; line-height: 1.85; }
    .faq-item .panel[hidden] { display: none; }
    .strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 28px; }
    .strip-item {
      background: rgba(255,255,255,.04); border: 1px solid #3A4148; border-radius: 6px; padding: 16px;
    }
    .strip-item strong { display: block; color: var(--dawn); margin-bottom: 4px; }
    .strip-item span { font-size: 14px; color: #C9C4B8; }
    .cta-band { background: var(--ink); color: #E8E4DA; padding: 88px 0 108px; }
    .cta-band h2 { color: var(--white); }
    .cta-band h2::before { background: var(--dawn); }
    .cta-band .section-head p { color: #C9C4B8; }
    .cta-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 36px; }
    .value-list { list-style: none; }
    .value-list li { padding: 10px 0 10px 18px; position: relative; border-bottom: 1px solid #2C3238; font-size: 15px; }
    .value-list li::before { content: ""; width: 8px; height: 2px; background: var(--copper); position: absolute; left: 0; top: 20px; }
    .form-card { background: #23272C; padding: 24px; border-radius: var(--radius); border: 1px solid #3A4148; }
    label { display: block; font-size: 13px; margin: 0 0 6px; color: #D8D3C8; }
    .field { margin-bottom: 12px; }
    input[type="text"], input[type="tel"], textarea {
      width: 100%; border: 1px solid #5C646C; background: #1B1E22; color: var(--white);
      border-radius: 6px; min-height: 44px; padding: 8px 12px; font-size: 15px;
    }
    textarea { min-height: 96px; resize: vertical; }
    input:focus, textarea:focus { border-color: var(--copper); outline: none; }
    .checks { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
    .checks label { display: flex; align-items: center; gap: 8px; min-height: 44px; margin: 0; color: #E8E4DA; font-size: 14px; }
    .form-note, .form-err, .form-ok { font-size: 13px; margin-top: 10px; }
    .form-note { color: #A8B0B6; }
    .form-err { color: #E8A394; }
    .form-ok { color: #8FCBB8; }
    .form-err[hidden], .form-ok[hidden] { display: none; }
    .site-footer { background: #14171A; color: #C9C4B8; padding: 48px 0 24px; font-size: 14px; }
    .foot-grid { display: grid; grid-template-columns: 1.2fr .9fr 1fr; gap: 28px; margin-bottom: 28px; }
    .site-footer h2, .site-footer h3 { color: var(--white); font-size: 16px; margin-bottom: 12px; }
    .site-footer a { color: #D8D3C8; }
    .site-footer a:hover { color: var(--dawn); }
    .foot-map { list-style: none; display: grid; gap: 8px; }
    .foot-deco {
      height: 10px; margin-bottom: 18px;
      background: repeating-linear-gradient(90deg, var(--copper) 0 6px, transparent 6px 12px);
      opacity: .35; width: 120px;
    }
    .foot-bar {
      border-top: 1px solid #2C3238; padding-top: 16px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
      color: #8B9298; font-size: 13px;
    }
    .stick-bar {
      position: fixed; left: 0; right: 0; bottom: 0; z-index: 40;
      background: var(--graphite); color: var(--white); transform: translateY(110%);
      transition: transform .25s ease; box-shadow: 0 -4px 10px rgba(27,30,34,.2);
    }
    .stick-bar.is-show { transform: translateY(0); }
    .stick-inner {
      width: min(100% - 32px, var(--max)); margin: 0 auto; min-height: 60px;
      display: flex; align-items: center; gap: 16px; padding: 8px 0;
    }
    .stick-inner p { margin: 0; font-size: 14px; }
    .stick-inner .btn { margin-left: auto; }
    @media (max-width: 1199px) {
      .bento { grid-template-columns: 1fr 1fr; grid-template-areas: "a a" "b c" "e e" "d f"; }
      .news-grid, .stats { grid-template-columns: repeat(3, 1fr); }
      .stats .stat:nth-child(3) { border-right: 0; }
    }
    @media (max-width: 991px) {
      :root { --space: 64px; }
      .nav-links, .nav-cta { display: none; }
      .nav-toggle { display: inline-flex; }
      .hero-grid, .split, .check-grid, .product-stage, .batch-grid, .dark-case .container, .cta-grid, .foot-grid {
        grid-template-columns: 1fr;
      }
      .product-lead { grid-template-columns: 1fr; }
      .product-lead img { min-height: 220px; height: 220px; }
      .story, .story article { grid-template-columns: 1fr; }
      .story article:nth-child(2) { direction: ltr; }
      .badge-wall, .strip, .proof-row { grid-template-columns: 1fr 1fr; }
      .proof-item:nth-child(2) { border-right: 0; }
      .tiers { grid-template-columns: 1fr; }
      .tier-rec { transform: none; }
      .hero { min-height: auto; }
      .hero-grid { min-height: auto; padding: 36px 0 110px; }
      .hero-slide img { min-height: 100%; }
    }
    @media (max-width: 767px) {
      body { font-size: 16px; }
      .topbar-inner { grid-template-columns: 1fr auto; }
      .cert-pills, .top-mail { display: none; }
      .steps { grid-template-columns: 1fr; }
      .step { border-right: 0; border-bottom: 1px solid var(--line); padding: 20px 0; }
      .param-bar, .stats, .compare, .news-grid { grid-template-columns: 1fr; }
      .stat { border-right: 0; border-bottom: 1px solid var(--line); }
      .scene-panel img, .split-media img { height: 240px; }
      .hero h1, .hero .slide-title { font-size: 28px; }
      .stick-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
      .stick-inner p { display: none; }
      .stick-inner a.btn, .stick-inner a.tel-btn { width: 100%; margin: 0; }
      .slot-grid, .checks { grid-template-columns: 1fr; }
      .foot-bar { flex-direction: column; }
    }
    @media (max-width: 520px) {
      :root { --space: 48px; }
      .container, .topbar-inner, .nav-row, .hero-grid, .hero-ctrl, .stick-inner { width: min(100% - 24px, var(--max)); }
      .badge-wall, .strip, .proof-row, .bento { grid-template-columns: 1fr; grid-template-areas: none; }
      .a, .b, .c, .d, .e, .f { grid-area: auto; }
      .proof-item { border-right: 0; border-bottom: 1px solid var(--mist); }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after { animation: none !important; transition: none !important; }
    }