/* Senfa Mfg — design system
   Palette: warm off-white / charcoal / single orange accent
   Principle: one thing per screen, big type, generous whitespace */

:root{
  --bg:#FAF7F3;
  --surface:#FFFFFF;
  --ink:#1D1F21;
  --muted:#6B6B6B;
  --line:#E4DED6;
  --accent:#D95B1E;
  --accent-dark:#B94A14;
  --dark:#22252A;
  --dark-ink:#F2EFEA;
  --radius:2px;
  --wrap:1180px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 28px}
.kicker{font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);font-weight:600}
h1,h2,h3{line-height:1.15;font-weight:600;letter-spacing:-.015em}
h1{font-size:clamp(38px,5.2vw,64px)}
h2{font-size:clamp(28px,3.4vw,42px)}
h3{font-size:21px}
p.lead{font-size:clamp(18px,2vw,21px);color:var(--muted);max-width:62ch}
.small{font-size:14px;color:var(--muted)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;background:rgba(250,247,243,.94);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line);
}
.hdr{display:flex;align-items:center;justify-content:space-between;height:74px}
.logo{display:flex;align-items:baseline;gap:8px;font-weight:700;letter-spacing:.06em;font-size:20px}
.logo span{color:var(--accent);font-size:12px;letter-spacing:.2em;font-weight:600}
.nav{display:flex;gap:34px;align-items:center}
.nav a{font-size:15px;color:#333;padding:6px 0;border-bottom:2px solid transparent;transition:.18s}
.nav a:hover,.nav a.active{color:var(--accent);border-bottom-color:var(--accent)}
.hdr-cta{background:var(--accent);color:#fff;padding:11px 20px;font-size:14px;font-weight:600;border-radius:var(--radius)}
.hdr-cta:hover{background:var(--accent-dark)}
.burger{display:none;background:none;border:0;cursor:pointer;flex-direction:column;gap:5px;width:26px;padding:4px 0}
.burger span{display:block;height:2px;width:100%;background:var(--ink)}

/* ---------- hero ---------- */
.hero{padding:clamp(56px,9vw,112px) 0 clamp(48px,7vw,88px);border-bottom:1px solid var(--line)}
.hero .kicker{margin-bottom:22px}
.hero h1{max-width:16ch;margin-bottom:26px}
.hero p.lead{margin-bottom:34px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.btn{display:inline-block;padding:15px 28px;font-weight:600;font-size:15px;border-radius:var(--radius);transition:.18s;border:1px solid transparent}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dark)}
.btn-ghost{border-color:#CFC7BD;color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink)}
.trust-strip{display:flex;gap:38px;flex-wrap:wrap;margin-top:52px;padding-top:26px;border-top:1px solid var(--line)}
.trust-strip div{min-width:120px}
.trust-strip b{display:block;font-size:24px;font-weight:600}
.trust-strip span{font-size:13px;color:var(--muted)}

/* ---------- sections ---------- */
section.band{padding:clamp(60px,7vw,96px) 0}
.band-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:44px;flex-wrap:wrap}
.band-head p{color:var(--muted);max-width:52ch}
.link-arrow{color:var(--accent);font-weight:600;font-size:15px;white-space:nowrap}
.link-arrow::after{content:" →"}

/* scene cards */
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.scene{
  position:relative;display:block;aspect-ratio:3/4;overflow:hidden;background:#DCD5CC;
  border-radius:var(--radius);
}
.scene img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease;filter:saturate(.92)}
.scene:hover img{transform:scale(1.04)}
.scene span{
  position:absolute;left:0;right:0;bottom:0;padding:18px;color:#fff;font-weight:600;font-size:17px;
  background:linear-gradient(transparent,rgba(20,20,20,.72));
}

/* product cards */
.prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.prod{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:.2s}
.prod:hover{border-color:#C9C0B5;transform:translateY(-2px)}
.prod-img{aspect-ratio:4/3;overflow:hidden;background:#F1ECE5}
.prod-img img{width:100%;height:100%;object-fit:cover}
.prod-body{padding:18px 18px 22px}
.prod-body h3{font-size:17px;margin-bottom:8px}
.prod-body .pain{font-size:13.5px;color:var(--muted);line-height:1.55}
.prod-body .pain b{color:#8A4B22;font-weight:600}

/* dark block */
.dark{background:var(--dark);color:var(--dark-ink)}
.dark .kicker{color:#E88A4F}
.dark h2{color:#fff}
.dark p{color:#B9B4AC}
.dark-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:64px;align-items:center}
.dark-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:36px}
.dark-stats div{border-top:1px solid #3C4046;padding-top:16px}
.dark-stats b{display:block;font-size:34px;color:#fff;font-weight:600;line-height:1}
.dark-stats span{font-size:13px;color:#9A958D;display:block;margin-top:8px}
.dark-list li{padding:18px 0;border-bottom:1px solid #34383E;display:flex;gap:14px;font-size:15px;color:#C9C4BC}
.dark-list li:last-child{border:0}
.dark-list b{color:#fff;font-weight:600}
.dark-list .n{color:#E88A4F;font-variant-numeric:tabular-nums}

/* one-stop strip */
.onestop{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#F4F0EA}
.trim-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.trim{padding:34px 26px;border-right:1px solid var(--line)}
.trim:last-child{border-right:0}
.trim h3{font-size:16px;margin-bottom:8px}
.trim p{font-size:13.5px;color:var(--muted)}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;counter-reset:s}
.step{counter-increment:s;border-top:2px solid var(--ink);padding-top:18px}
.step::before{content:"0" counter(s);display:block;font-size:13px;color:var(--accent);font-weight:600;letter-spacing:.1em;margin-bottom:10px}
.step h3{font-size:17px;margin-bottom:8px}
.step p{font-size:14px;color:var(--muted)}

/* cta band */
.cta-band{background:var(--accent);color:#fff;padding:clamp(48px,6vw,76px) 0}
.cta-band h2{color:#fff;max-width:24ch}
.cta-band p{color:#FFE6D9;margin:16px 0 30px;max-width:56ch}
.cta-band .btn{background:#1D1F21;color:#fff}
.cta-band .btn:hover{background:#000}
.cta-contacts{display:flex;gap:26px;flex-wrap:wrap;margin-top:26px;font-size:15px}
.cta-contacts a{border-bottom:1px solid rgba(255,255,255,.5);padding-bottom:2px}

/* page head (inner pages) */
.page-head{padding:clamp(48px,6vw,84px) 0 clamp(32px,4vw,52px);border-bottom:1px solid var(--line)}
.page-head h1{font-size:clamp(32px,4.2vw,50px);max-width:22ch}
.page-head p{color:var(--muted);max-width:64ch;margin-top:18px}
.crumb{font-size:13px;color:var(--muted);margin-bottom:18px}
.crumb a:hover{color:var(--accent)}

/* gallery */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:38px}
.gallery img{width:100%;height:auto;aspect-ratio:1;object-fit:cover;border-radius:var(--radius);background:#F1ECE5}

/* spec table */
.spec{width:100%;border-collapse:collapse;margin-top:28px;font-size:15px;background:var(--surface)}
.spec th,.spec td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--line);vertical-align:top}
.spec th{width:32%;font-weight:600;color:#333;background:#F8F4EF}
.spec tr:last-child td,.spec tr:last-child th{border-bottom:0}

/* two col content */
.two-col{display:grid;grid-template-columns:1.15fr .85fr;gap:64px}
.aside-box{background:var(--surface);border:1px solid var(--line);padding:28px;border-radius:var(--radius);height:fit-content}
.aside-box h3{font-size:16px;margin-bottom:14px}
.aside-box ul li{padding:9px 0;border-bottom:1px solid #F0EBE4;font-size:14.5px;color:#444}
.aside-box ul li:last-child{border:0}

/* faq */
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);margin-bottom:12px}
.faq summary{padding:20px 22px;font-weight:600;cursor:pointer;font-size:16px;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-size:20px;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq .ans{padding:0 22px 22px;color:#494949;font-size:15px;max-width:74ch}

/* footer */
.site-footer{background:var(--dark);color:#B9B4AC;padding:66px 0 34px;font-size:14.5px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:44px}
.site-footer h4{color:#fff;font-size:14px;letter-spacing:.12em;text-transform:uppercase;margin-bottom:16px;font-weight:600}
.site-footer a:hover{color:#fff}
.site-footer li{padding:5px 0}
.foot-bottom{margin-top:48px;padding-top:22px;border-top:1px solid #34383E;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:13px;color:#8A857E}

/* misc */
.tag-row{display:flex;gap:10px;flex-wrap:wrap;margin:26px 0 0}
.tag{font-size:12.5px;border:1px solid #D5CCC1;padding:6px 12px;border-radius:99px;color:#5B5B5B}
.note{font-size:13px;color:var(--muted);margin-top:14px}

/* responsive */
@media(max-width:1000px){
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .prod-grid{grid-template-columns:repeat(2,1fr)}
  .trim-grid{grid-template-columns:repeat(2,1fr)}
  .trim:nth-child(2){border-right:0}
  .dark-grid,.two-col{grid-template-columns:1fr;gap:40px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  body{font-size:16px}
  .nav{display:none;position:absolute;top:74px;left:0;right:0;background:var(--bg);border-bottom:1px solid var(--line);flex-direction:column;gap:0;padding:10px 28px 22px}
  .nav.open{display:flex}
  .nav a{width:100%;padding:13px 0;border-bottom:1px solid var(--line)}
  .burger{display:flex}
  .hdr-cta{display:none}
  .prod-grid{grid-template-columns:1fr}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr}
  .trust-strip{gap:22px}
  .dark-stats{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr}
}

/* ---------- homepage v2: photo-led ---------- */
.logo svg{display:block}
.hero-grid{display:grid;grid-template-columns:1.04fr .96fr;gap:56px;align-items:center}
.hero-media{position:relative}
.hero-media img{width:100%;aspect-ratio:14/9;object-fit:cover;border-radius:var(--radius);display:block}
.hero-media::after{content:"";position:absolute;inset:0;border:1px solid var(--line);border-radius:var(--radius);pointer-events:none}
.scene span i{font-style:normal;margin-left:10px;opacity:0;transform:translateX(-6px);transition:.25s;display:inline-block}
.scene:hover span i{opacity:1;transform:translateX(0)}
.trim-split{display:grid;grid-template-columns:.92fr 1.08fr;gap:56px;align-items:center}
.trim-media img{width:100%;aspect-ratio:14/10;object-fit:cover;border-radius:var(--radius);display:block}
.trim-grid--2{grid-template-columns:1fr 1fr;border:0}
.trim-grid--2 .trim{padding:22px 0 0;border-right:0;border-top:2px solid var(--line)}
.trim-grid--2 .trim:nth-child(even){padding-left:26px;border-left:1px solid var(--line)}
@media(max-width:1000px){
  .hero-grid,.trim-split{grid-template-columns:1fr;gap:36px}
  .hero-media{order:-1}
}
@media(max-width:680px){
  .trim-grid--2{grid-template-columns:1fr}
  .trim-grid--2 .trim:nth-child(even){padding-left:0;border-left:0}
}

/* homepage: 6-card grid (3 cols) */
.prod-grid--3{grid-template-columns:repeat(3,1fr)}
@media(max-width:1000px){.prod-grid--3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.prod-grid--3{grid-template-columns:1fr}}

/* ---------- lite mode: notice bar / disabled nav / coming-soon ---------- */
.notice-bar{background:#1D1F21;color:#F2EFEA;text-align:center;font-size:14px;letter-spacing:.04em;padding:11px 20px}
.notice-bar::before{content:"● ";color:#E06618;font-size:10px;vertical-align:2px}
/* 临时期：栏目文字保留但不可点，光标保持默认，悬停靠 title 提示"更新中" */
.nav-off{color:#B4AA9D;cursor:default}
.nav .nav-off.active{color:#1D1F21}
.prod-lite{padding:30px 30px 26px}
.prod-lite .pain{margin:0}
.coming-soon{border:1.5px dashed #C9BEAF;border-radius:var(--radius);padding:56px 28px;text-align:center;background:#FBF8F4}
.cs-title{font-size:20px;font-weight:600;color:#1D1F21}
.cs-sub{font-size:15px;color:#6B6B6B;max-width:52ch;margin:12px auto 24px}