/* ============================================================
   GASKET ONE — B2B Website Stylesheet
   标识规范：Deep Teal #0F5C4E / Amber #D98A2B
             Graphite #1A1A18 / Warm Grey #F3F1EA
   字体：Inter 300 / 600 / 700 / 800
   ============================================================ */

:root {
  --teal: #0F5C4E;
  --teal-dark: #0B463C;
  --teal-soft: #E7EEE9;
  --amber: #D98A2B;
  --amber-text: #A9641A;   /* 浅底小字用的加深琥珀，保证对比度 */
  --amber-soft: #FAEFDF;
  --ink: #1A1A18;          /* Graphite */
  --ink-2: #2B2B27;
  --steel: #5F5E56;
  --muted: #82806F;
  --line: #E2DFD4;
  --paper: #F3F1EA;        /* Warm Grey */
  --white: #FFFFFF;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(26, 26, 24, 0.08);
  --font: "Inter", "Helvetica Neue", "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 92px 0; }
.section.alt { background: var(--paper); }
.section-head { max-width: 720px; margin-bottom: 48px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 14px;
}
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.01em; }
h2 { font-size: clamp(28px, 3.4vw, 40px); font-weight: 800; }
h3 { font-size: 19px; font-weight: 700; }
.lead { color: var(--steel); font-size: 17px; margin-top: 14px; }

/* ---------- bilingual visibility ---------- */
body[data-lang="en"] .t-cn { display: none; }
body[data-lang="cn"] .t-en { display: none; }

/* ---------- photo ---------- */
.ph {
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--paper);
  position: relative;
}
.ph img { width: 100%; height: 100%; object-fit: cover; }
.ph::after {
  content: "";
  position: absolute; inset: 0;
  box-shadow: inset 0 0 0 1px rgba(26,26,24,0.06);
  border-radius: inherit;
  pointer-events: none;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px;
  border-radius: 8px;
  font-weight: 700; font-size: 15px;
  cursor: pointer; border: none;
  transition: all .2s ease;
}
/* 琥珀留给关键操作；配石墨字保证对比度 */
.btn-primary { background: var(--amber); color: var(--ink); }
.btn-primary:hover { background: #C4801F; transform: translateY(-1px); }
.btn-ghost { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,0.55); }
.btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,0.1); }
.btn-dark { background: var(--teal); color: #fff; }
.btn-dark:hover { background: var(--teal-dark); transform: translateY(-1px); }

/* ---------- header（深绿底 + 反白标识，规范 02）---------- */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(15, 92, 78, 0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.14);
}
.header-inner {
  display: flex; align-items: center; gap: 28px;
  height: 76px;
}
.logo { display: flex; align-items: center; gap: 11px; color: #fff; }
.logo-mark { width: 30px; height: 30px; flex-shrink: 0; }
.logo-word {
  font-size: 20px; letter-spacing: 0.04em; line-height: 1;
  display: inline-flex; align-items: baseline; gap: 6px;
}
.logo-word b { font-weight: 800; }
.logo-word i { font-style: normal; font-weight: 300; }
.logo-tag {
  color: rgba(255,255,255,0.55);
  font-size: 10.5px; letter-spacing: 0.13em; text-transform: uppercase;
  border-left: 1px solid rgba(255,255,255,0.28);
  padding-left: 12px; margin-left: 3px;
  max-width: 150px; line-height: 1.3;
}
.nav { display: flex; gap: 26px; margin-left: auto; }
.nav a {
  font-size: 15px; font-weight: 600; color: rgba(255,255,255,0.76);
  padding: 6px 0; position: relative; transition: color .2s;
}
.nav a:hover, .nav a.active { color: #fff; }
.nav a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px;
  height: 2.5px; background: var(--amber); border-radius: 2px;
}
.header-actions { display: flex; align-items: center; gap: 14px; }

.lang-switch {
  display: flex; align-items: center;
  border: 1.5px solid rgba(255,255,255,0.32); border-radius: 999px;
  padding: 3px; background: transparent;
}
.lang-switch button {
  border: none; background: transparent; cursor: pointer;
  font-family: var(--font); font-size: 13px; font-weight: 700;
  padding: 4px 12px; border-radius: 999px; color: rgba(255,255,255,0.72);
  transition: all .2s;
}
.lang-switch button.on { background: #fff; color: var(--teal); }

.header .btn-quote { padding: 10px 20px; font-size: 14px; }

.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 6px; }
.nav-toggle span { display: block; width: 22px; height: 2.5px; background: #fff; margin: 5px 0; border-radius: 2px; transition: .25s; }

/* ---------- hero ---------- */
.hero {
  position: relative;
  min-height: 86vh;
  display: flex; align-items: center;
  color: #fff;
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(12,30,26,0.9) 0%, rgba(12,30,26,0.66) 46%, rgba(12,30,26,0.3) 100%);
}
.hero-inner { position: relative; z-index: 2; max-width: 780px; padding: 118px 0; }
.hero .eyebrow { color: #E9B978; }
.hero h1 { font-size: clamp(34px, 5vw, 58px); font-weight: 800; letter-spacing: -0.02em; }
.hero p.lead { color: rgba(255,255,255,0.84); font-size: 18px; max-width: 610px; margin-top: 20px; }
.hero-cta { display: flex; gap: 14px; margin-top: 36px; flex-wrap: wrap; }

.hero-badges {
  position: relative; z-index: 2;
  border-top: 1px solid rgba(255,255,255,0.16);
  background: rgba(12,30,26,0.6);
  backdrop-filter: blur(6px);
}
.hero-badges-inner {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  padding: 22px 0;
}
.badge-item { display: flex; flex-direction: column; gap: 2px; }
.badge-item b { font-size: 17px; }
.badge-item span { font-size: 12.5px; color: rgba(255,255,255,0.62); letter-spacing: 0.04em; }

/* ---------- page hero ---------- */
.page-hero {
  background: var(--teal);
  color: #fff;
  padding: 84px 0 76px;
  position: relative; overflow: hidden;
}
.page-hero::after {
  content: ""; position: absolute; right: -140px; top: -140px;
  width: 480px; height: 480px; border-radius: 50%;
  border: 70px solid rgba(217, 138, 43, 0.16);
}
.page-hero .eyebrow { color: #E9B978; }
.page-hero h1 { font-size: clamp(30px, 4vw, 46px); font-weight: 800; }
.page-hero p { color: rgba(255,255,255,0.76); max-width: 660px; margin-top: 16px; font-size: 17px; }

/* ---------- split ---------- */
.split { display: grid; grid-template-columns: 1.05fr 1fr; gap: 64px; align-items: center; }
.split.rev { grid-template-columns: 1fr 1.05fr; }
.split .ph { aspect-ratio: 4 / 3; }

/* ---------- cards ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 28px;
  transition: all .25s ease;
}
.card:hover { box-shadow: var(--shadow); transform: translateY(-4px); border-color: transparent; }
.card .icon {
  width: 46px; height: 46px; border-radius: 11px;
  background: var(--teal-soft); color: var(--teal);
  display: flex; align-items: center; justify-content: center;
  font-size: 21px; margin-bottom: 18px;
}
.card h3 { margin-bottom: 9px; }
.card p { color: var(--steel); font-size: 14.5px; }

/* ---------- product cards ---------- */
.product-card {
  border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; background: var(--white);
  transition: all .25s ease; display: flex; flex-direction: column;
}
.product-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.product-card .ph { border-radius: 0; aspect-ratio: 16 / 10; }
.product-card .pc-body { padding: 22px 24px 26px; }
.product-card h3 { font-size: 17.5px; margin-bottom: 8px; }
.product-card p { color: var(--steel); font-size: 14px; flex: 1; }
.product-card .pc-link {
  margin-top: 16px; display: inline-flex; align-items: center; gap: 6px;
  color: var(--amber-text); font-weight: 700; font-size: 14px;
  transition: gap .2s;
}
.product-card:hover .pc-link { gap: 10px; }

/* ---------- chips ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  padding: 8px 18px; border-radius: 999px;
  background: var(--white); border: 1px solid var(--line);
  font-size: 14px; font-weight: 600; color: var(--ink-2);
}
.chip.hot { background: var(--teal); color: #fff; border-color: var(--teal); }

/* ---------- industries ---------- */
.ind-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.ind-item {
  display: flex; align-items: center; gap: 14px;
  background: var(--white); border: 1px solid var(--line);
  border-radius: 12px; padding: 18px 20px;
  font-weight: 700; font-size: 15px;
  transition: all .2s;
}
.ind-item:hover { border-color: var(--amber); color: var(--amber-text); }
.ind-item .ic { font-size: 22px; }

/* ---------- steps ---------- */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; counter-reset: step; }
.step {
  background: var(--white); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px 22px; position: relative;
}
.step::before {
  counter-increment: step; content: "0" counter(step);
  font-size: 30px; font-weight: 800; color: var(--amber);
  display: block; margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
}
.step h3 { font-size: 16px; margin-bottom: 7px; }
.step p { font-size: 13.5px; color: var(--steel); }

/* ---------- stats ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat b { font-size: clamp(32px, 3.6vw, 46px); font-weight: 800; color: var(--ink); display: block; line-height: 1.1; }
.stat b em { font-style: normal; color: var(--amber-text); }
.stat span { color: var(--steel); font-size: 14px; margin-top: 6px; display: block; }

/* ---------- tables ---------- */
.spec-table { width: 100%; border-collapse: collapse; background: var(--white); border-radius: var(--radius); overflow: hidden; box-shadow: 0 1px 0 var(--line); }
.spec-table th, .spec-table td { padding: 15px 20px; text-align: left; font-size: 14.5px; border-bottom: 1px solid var(--line); }
.spec-table th { background: var(--teal); color: #fff; font-weight: 700; font-size: 13.5px; letter-spacing: 0.04em; }
.spec-table tr:last-child td { border-bottom: none; }
.spec-table tr:nth-child(even) td { background: var(--paper); }
.spec-table td:first-child { font-weight: 700; }

/* ---------- CTA band ---------- */
.cta-band {
  background: var(--teal); color: #fff;
  border-radius: 20px;
  padding: 60px 56px;
  display: flex; align-items: center; justify-content: space-between; gap: 32px;
  position: relative; overflow: hidden;
}
.cta-band::after {
  content: ""; position: absolute; right: -80px; bottom: -120px;
  width: 320px; height: 320px; border-radius: 50%;
  border: 46px solid rgba(217,138,43,0.22);
}
.cta-band h2 { font-size: clamp(24px, 3vw, 34px); }
.cta-band p { color: rgba(255,255,255,0.74); margin-top: 10px; }
.cta-band .btn { position: relative; z-index: 2; flex-shrink: 0; }

/* ---------- contact ---------- */
.contact-wrap { display: grid; grid-template-columns: 1fr 1.2fr; gap: 56px; align-items: start; }
.info-card {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 20px 0; border-bottom: 1px solid var(--line);
}
.info-card:last-child { border-bottom: none; }
.info-card .ic {
  width: 42px; height: 42px; flex-shrink: 0; border-radius: 10px;
  background: var(--teal-soft); color: var(--teal);
  display: flex; align-items: center; justify-content: center; font-size: 19px;
}
.info-card b { display: block; font-size: 15px; margin-bottom: 2px; }
.info-card span, .info-card a { color: var(--steel); font-size: 14.5px; }
.info-card a:hover { color: var(--teal); }

.form-card {
  background: var(--white); border: 1px solid var(--line);
  border-radius: 18px; padding: 36px;
  box-shadow: var(--shadow);
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-grid .full { grid-column: 1 / -1; }
.field label { display: block; font-size: 13px; font-weight: 700; margin-bottom: 7px; color: var(--ink-2); }
.field input, .field textarea, .field select {
  width: 100%; padding: 12px 14px;
  border: 1.5px solid var(--line); border-radius: 9px;
  font-family: var(--font); font-size: 14.5px; color: var(--ink);
  background: var(--paper); transition: border .2s;
}
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--teal); background: #fff; }
.field textarea { min-height: 120px; resize: vertical; }
.form-note { font-size: 12.5px; color: var(--muted); margin-top: 14px; }
.form-status { margin-top: 12px; font-size: 14px; color: var(--teal); font-weight: 600; display: none; }
.form-status.show { display: block; }

/* ---------- check list ---------- */
.check-list li {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 9px 0; color: var(--steel); font-size: 15px;
}
.check-list li::before {
  content: "✓"; flex-shrink: 0;
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--teal-soft); color: var(--teal);
  font-size: 12px; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  margin-top: 3px;
}

/* ---------- about ---------- */
.about-img-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 20px; }
.about-img-grid .ph { aspect-ratio: auto; height: 300px; }

/* ---------- footer ---------- */
.footer { background: var(--ink); color: rgba(255,255,255,0.72); padding: 64px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 44px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer a:hover { color: #fff; }
.footer li { padding: 5px 0; font-size: 14px; }
.footer .f-about p { font-size: 14px; margin-top: 14px; max-width: 300px; }
.footer .f-logo { color: #fff; display: inline-flex; align-items: center; gap: 10px; }
.footer .f-logo svg { width: 28px; height: 28px; }

.footer-bottom { display: flex; justify-content: space-between; gap: 16px; padding-top: 24px; font-size: 13px; color: rgba(255,255,255,0.45); flex-wrap: wrap; }
.footer-legal { margin-top: 6px; font-size: 12.5px; line-height: 1.7; color: rgba(255,255,255,0.42); }
.trade-strip { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 34px; }
.trade-strip .chip { padding: 9px 16px; border: 1px solid var(--line); border-radius: 999px; background: #fff; font-size: 13.5px; font-weight: 600; line-height: 1.2; color: var(--teal); }

/* ---------- reveal ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 1100px) {
  .logo-tag { display: none; }
}
@media (max-width: 1024px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .ind-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .split, .split.rev, .contact-wrap { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-badges-inner { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .nav {
    display: none; position: absolute; top: 76px; left: 0; right: 0;
    background: #fff; flex-direction: column; gap: 0;
    border-bottom: 1px solid var(--line);
    padding: 8px 24px 16px; box-shadow: var(--shadow);
  }
  .nav.open { display: flex; }
  .nav a { color: var(--ink); padding: 13px 0; border-bottom: 1px solid var(--paper); }
  .nav a:hover, .nav a.active { color: var(--teal); }
  .nav-toggle { display: block; }
  .header .btn-quote { display: none; }
  .header-actions { margin-left: auto; }
  .grid-3, .grid-4, .steps { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .form-grid { grid-template-columns: 1fr; }
  .cta-band { flex-direction: column; align-items: flex-start; padding: 44px 30px; }
  .section { padding: 64px 0; }
  .hero-inner { padding: 88px 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .logo-word { font-size: 17px; }
}