/* ==========================================================================
   Hebei Shanshui Fastener — Corporate Site Stylesheet
   ========================================================================== */

:root{
  --navy:#0b2545;
  --navy-700:#123a63;
  --navy-600:#1b4a7a;
  --steel:#eef2f7;
  --steel-200:#dde5ee;
  --line:#d7dee8;
  --orange:#e8620c;
  --orange-dark:#c74f05;
  --ink:#12202f;
  --muted:#5a6b7d;
  --white:#ffffff;
  --radius:10px;
  --radius-sm:6px;
  --shadow:0 2px 14px rgba(11,37,69,.08);
  --shadow-lg:0 12px 40px rgba(11,37,69,.14);
  --max:1200px;
  --font:"Segoe UI",-apple-system,BlinkMacSystemFont,Roboto,"Helvetica Neue",Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:var(--white);
  font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--navy-600);text-decoration:none;transition:color .18s}
a:hover{color:var(--orange)}

h1,h2,h3,h4{line-height:1.22;margin:0 0 .6em;color:var(--navy);font-weight:700;letter-spacing:-.01em}
h1{font-size:2.6rem}
h2{font-size:2rem}
h3{font-size:1.25rem}
p{margin:0 0 1em}

.wrap{max-width:var(--max);margin:0 auto;padding:0 22px}
.section{padding:76px 0}
.section--tight{padding:52px 0}
.section--steel{background:var(--steel)}
.section--navy{background:var(--navy);color:#dfe8f2}
.section--navy h2,.section--navy h3{color:#fff}

.eyebrow{
  display:inline-block;font-size:.78rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--orange);font-weight:700;margin-bottom:12px;
}
.section-head{max-width:780px;margin:0 auto 46px;text-align:center}
.section-head p{color:var(--muted);font-size:1.06rem;margin:0}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:9px;padding:13px 26px;border-radius:var(--radius-sm);
  font-weight:600;font-size:.95rem;border:1px solid transparent;cursor:pointer;
  transition:transform .16s,box-shadow .16s,background .16s,color .16s;
}
.btn--primary{background:var(--orange);color:#fff}
.btn--primary:hover{background:var(--orange-dark);color:#fff;transform:translateY(-1px);box-shadow:0 8px 22px rgba(232,98,12,.32)}
.btn--ghost{background:transparent;color:var(--navy);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--navy);color:var(--navy);background:#fff}
.btn--light{background:#fff;color:var(--navy)}
.btn--light:hover{color:var(--orange);transform:translateY(-1px)}

/* ---------- Top bar ---------- */
.topbar{background:var(--navy);color:#b9c9dc;font-size:.84rem}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:40px;flex-wrap:wrap}
.topbar a{color:#b9c9dc}
.topbar a:hover{color:#fff}
.topbar__list{display:flex;gap:20px;align-items:center;flex-wrap:wrap;margin:0;padding:0;list-style:none}
.topbar__list li{display:flex;align-items:center;gap:7px}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.97);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:74px}
.brand{display:flex;align-items:center;gap:12px;color:var(--navy)}
.brand:hover{color:var(--navy)}
.brand__mark{
  width:44px;height:44px;border-radius:9px;background:var(--navy);color:#fff;
  display:grid;place-items:center;font-weight:800;font-size:1.05rem;letter-spacing:.02em;flex:none;
}
.brand__text{display:flex;flex-direction:column;line-height:1.15}
.brand__name{font-weight:800;font-size:1.02rem;letter-spacing:-.01em}
.brand__sub{font-size:.7rem;color:var(--muted);letter-spacing:.09em;text-transform:uppercase}

.nav{display:flex;align-items:center;gap:4px}
.nav a{padding:10px 13px;border-radius:6px;font-size:.93rem;font-weight:600;color:var(--navy)}
.nav a:hover{background:var(--steel);color:var(--navy-600)}
.nav a[aria-current="page"]{color:var(--orange)}
.nav__cta{margin-left:10px}

.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:6px;padding:9px 11px;cursor:pointer}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--navy);margin:4px 0;border-radius:2px}

/* ---------- Hero ---------- */
.hero{
  position:relative;color:#fff;overflow:hidden;
  background:linear-gradient(118deg,#081c33 0%,#0b2545 45%,#173f6b 100%);
}
.hero::after{
  content:"";position:absolute;inset:0;opacity:.16;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.5) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(ellipse at 75% 35%,#000 0%,transparent 72%);
          mask-image:radial-gradient(ellipse at 75% 35%,#000 0%,transparent 72%);
}
.hero .wrap{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:52px;align-items:center;padding-top:78px;padding-bottom:78px}
.hero h1{color:#fff;font-size:3rem;margin-bottom:18px}
.hero h1 .accent{color:#ff9a4d}
.hero__lead{font-size:1.12rem;color:#c3d3e5;max-width:560px;margin-bottom:30px}
.hero__actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:34px}
.hero__stats{display:flex;gap:38px;flex-wrap:wrap;padding-top:26px;border-top:1px solid rgba(255,255,255,.16)}
.hero__stat strong{display:block;font-size:1.75rem;color:#fff;font-weight:800;line-height:1.1}
.hero__stat span{font-size:.82rem;color:#9fb5cc;letter-spacing:.04em}

.hero__panel{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);border-radius:var(--radius);padding:26px}
.hero__panel h3{color:#fff;font-size:1rem;letter-spacing:.03em;text-transform:uppercase;margin-bottom:6px}
.hero__panel p{color:#b8cade;font-size:.9rem;margin-bottom:18px}
.hero__panel ul{list-style:none;margin:0 0 20px;padding:0;display:grid;gap:9px}
.hero__panel li{display:grid;grid-template-columns:16px 1fr auto;gap:11px;align-items:center;font-size:.92rem;color:#dbe6f2}
.hero__panel li i{color:#ff9a4d;font-style:normal;font-weight:800}
.hero__panel li em{font-style:normal;color:#8fa6bf;font-size:.8rem}

/* ---------- Page hero (inner pages) ---------- */
.page-hero{background:linear-gradient(118deg,#081c33,#0b2545 60%,#173f6b);color:#fff;padding:58px 0}
.page-hero h1{color:#fff;margin-bottom:10px}
.page-hero p{color:#b8cade;max-width:760px;margin:0}
.breadcrumb{display:flex;gap:9px;align-items:center;font-size:.85rem;color:#8fa6bf;margin-bottom:14px;flex-wrap:wrap}
.breadcrumb a{color:#9fb5cc}
.breadcrumb a:hover{color:#fff}
.breadcrumb span{color:#ff9a4d}

/* ---------- Cards / grids ---------- */
.grid{display:grid;gap:24px}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}

.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .2s,box-shadow .2s,border-color .2s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--steel-200)}
.card > img{width:100%;aspect-ratio:4/3;object-fit:cover;border-bottom:1px solid var(--line)}
.card__body{padding:24px;flex:1;display:flex;flex-direction:column}
.card__body h3{margin-bottom:8px}
.card__body p{color:var(--muted);font-size:.93rem;margin-bottom:14px}
.card__link{margin-top:auto;font-weight:600;font-size:.9rem}
.card__link::after{content:" →"}

.thumb{
  aspect-ratio:4/3;background:
    radial-gradient(circle at 30% 25%,#f4f7fa,#dfe7f0 70%);
  display:grid;place-items:center;border-bottom:1px solid var(--line);position:relative;overflow:hidden;
}
.thumb svg{width:62%;height:62%;opacity:.9}
.thumb__tag{
  position:absolute;top:12px;left:12px;background:var(--navy);color:#fff;font-size:.7rem;
  letter-spacing:.07em;text-transform:uppercase;padding:4px 9px;border-radius:4px;font-weight:700;
}
/* photo variant of the card thumbnail */
.thumb--photo{background:#f6f8fb}
.thumb--photo img{width:100%;height:100%;object-fit:cover;display:block}

/* ---------- Feature list ---------- */
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.feature__icon{
  width:48px;height:48px;border-radius:10px;background:var(--steel);color:var(--orange);
  display:grid;place-items:center;margin-bottom:16px;font-weight:800;font-size:1.15rem;
}
.feature h3{font-size:1.08rem;margin-bottom:8px}
.feature p{color:var(--muted);font-size:.92rem;margin:0}

/* ---------- Spec table ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius)}
table.spec{width:100%;border-collapse:collapse;font-size:.92rem;min-width:560px;background:#fff}
table.spec th,table.spec td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line)}
table.spec th{background:var(--steel);color:var(--navy);font-weight:700;font-size:.83rem;letter-spacing:.04em;text-transform:uppercase}
table.spec tr:last-child td{border-bottom:none}
table.spec tbody tr:hover{background:#fafcfe}

/* ---------- Check list ---------- */
.checks{list-style:none;margin:0;padding:0;display:grid;gap:11px}
.checks li{display:grid;grid-template-columns:20px 1fr;gap:11px;align-items:start;font-size:.95rem}
.checks li::before{content:"✓";color:#0f9d58;font-weight:800}

/* ---------- Process ---------- */
.process{counter-reset:step;display:grid;gap:20px;grid-template-columns:repeat(4,1fr)}
.process__item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;position:relative}
.process__item::before{
  counter-increment:step;content:counter(step,decimal-leading-zero);
  font-size:.8rem;font-weight:800;color:var(--orange);letter-spacing:.1em;display:block;margin-bottom:10px;
}
.process__item h3{font-size:1rem;margin-bottom:6px}
.process__item p{color:var(--muted);font-size:.9rem;margin:0}

/* ---------- Gallery ---------- */
.gallery figure{margin:0}
.gallery img{width:100%;aspect-ratio:4/3;object-fit:cover;border-bottom:1px solid var(--line)}
.gallery figcaption{padding:12px 16px;font-size:.85rem;color:var(--muted);background:#fff}
.grid--4.gallery figcaption{padding:10px 13px;font-size:.8rem}

/* ---------- CTA band ---------- */
.cta-band{background:linear-gradient(118deg,#0b2545,#173f6b);color:#fff;border-radius:var(--radius);padding:48px;display:grid;grid-template-columns:1.4fr auto;gap:30px;align-items:center}
.cta-band h2{color:#fff;margin-bottom:8px}
.cta-band p{color:#b8cade;margin:0}
.cta-band__actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:44px;align-items:start}
.info-list{list-style:none;margin:0;padding:0;display:grid;gap:20px}
.info-list li{display:grid;grid-template-columns:44px 1fr;gap:15px;align-items:start}
.info-list__icon{width:44px;height:44px;border-radius:9px;background:var(--steel);display:grid;place-items:center;color:var(--orange);font-weight:800}
.info-list strong{display:block;color:var(--navy);font-size:.85rem;letter-spacing:.05em;text-transform:uppercase;margin-bottom:3px}
.info-list a,.info-list span{color:var(--ink);font-size:.97rem;word-break:break-word}

form.inquiry{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow)}
.field{margin-bottom:18px}
.field label{display:block;font-size:.85rem;font-weight:700;color:var(--navy);margin-bottom:7px}
.field label .req{color:var(--orange)}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:var(--radius-sm);
  font-family:inherit;font-size:.94rem;color:var(--ink);background:#fff;transition:border-color .16s,box-shadow .16s;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--navy-600);box-shadow:0 0 0 3px rgba(27,74,122,.12);
}
.field textarea{resize:vertical;min-height:120px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-note{font-size:.82rem;color:var(--muted);margin:14px 0 0}
.form-status{margin-top:14px;padding:12px 14px;border-radius:var(--radius-sm);font-size:.9rem;display:none}
.form-status.is-ok{display:block;background:#e8f6ee;color:#0f6b3c;border:1px solid #b9e2ca}
.form-status.is-err{display:block;background:#fdeceb;color:#96231c;border:1px solid #f4c4c0}

/* ---------- Footer ---------- */
.site-footer{background:#08192c;color:#93a9c1;padding:58px 0 0;font-size:.92rem}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:36px;padding-bottom:40px}
.site-footer h4{color:#fff;font-size:.82rem;letter-spacing:.11em;text-transform:uppercase;margin-bottom:16px}
.site-footer a{color:#93a9c1}
.site-footer a:hover{color:#fff}
.site-footer ul{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.footer-brand .brand__mark{background:var(--orange)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:.85rem;color:#7b93ad}

/* ---------- Utility ---------- */
.lead{font-size:1.08rem;color:var(--muted)}
.mt-0{margin-top:0}.mb-0{margin-bottom:0}
.center{text-align:center}
.muted{color:var(--muted)}
.badge{display:inline-block;background:var(--steel);color:var(--navy);font-size:.78rem;font-weight:700;padding:5px 11px;border-radius:999px;letter-spacing:.03em}
.badge--orange{background:#fdeee3;color:var(--orange-dark)}

/* ---------- Responsive ---------- */
@media (max-width:1000px){
  .hero .wrap{grid-template-columns:1fr;gap:38px;padding-top:56px;padding-bottom:56px}
  .hero h1{font-size:2.35rem}
  .grid--4{grid-template-columns:repeat(2,1fr)}
  .process{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr;gap:34px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .cta-band{grid-template-columns:1fr;padding:36px}
}
@media (max-width:760px){
  h1{font-size:2rem}.hero h1{font-size:1.95rem}
  h2{font-size:1.6rem}
  .section{padding:54px 0}
  .grid--2,.grid--3,.grid--4{grid-template-columns:1fr}
  .process{grid-template-columns:1fr}
  .field-row{grid-template-columns:1fr}
  .nav{
    display:none;position:absolute;top:100%;left:0;right:0;background:#fff;
    flex-direction:column;align-items:stretch;padding:12px;border-bottom:1px solid var(--line);box-shadow:var(--shadow-lg);
  }
  .nav.is-open{display:flex}
  .nav a{padding:13px}
  .nav-toggle{display:block}
  .site-header .wrap{position:relative}
  .topbar__list{font-size:.78rem;gap:14px}
  .hero__stats{gap:24px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .cta-band{padding:28px}
}