:root {
  --black: #080808;
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --soft: #f5f5f7;
  --panel: #ffffff;
  --line: #e5e5ea;
  --deep-blue: #12304a;
  --green: #2f6f5e;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.08);
  --radius: 28px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background: #fff;
  line-height: 1.55;
}

a { color: inherit; text-decoration: none; }

.en, .lang-en .zh { display: none; }
.lang-en .en { display: inline; }
p.en, .lang-en p.en { display: none; }
.lang-en p.en { display: block; }

.glass-nav {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 50;
  width: min(1180px, calc(100% - 32px));
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 10px 12px 10px 20px;
  border: 1px solid rgba(255, 255, 255, 0.64);
  border-radius: 24px;
  background: rgba(246, 246, 248, 0.74);
  box-shadow: 0 16px 50px rgba(0, 0, 0, 0.08);
  backdrop-filter: saturate(180%) blur(22px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
  font-size: 14px;
  letter-spacing: 0;
}

.brand-dot {
  width: 24px;
  height: 24px;
  border-radius: 8px;
  background: linear-gradient(135deg, #111, #9a9a9f);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--muted);
  font-size: 13px;
}

.nav-links a {
  padding: 9px 10px;
  border-radius: 999px;
}

.nav-links a:hover {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.82);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.lang-toggle,
.quote-pill,
.button,
.quote-form button {
  min-height: 42px;
  border: 0;
  border-radius: 999px;
  padding: 0 18px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.lang-toggle {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.86);
}

.quote-pill,
.button.dark,
.quote-form button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: var(--black);
}

.button.light {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--black);
  background: #f1f1f3;
}

.section-shell {
  width: min(1240px, calc(100% - 44px));
  margin: 0 auto;
  padding: 108px 0;
}

.hero {
  min-height: 820px;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(420px, 1fr);
  gap: clamp(28px, 6vw, 80px);
  align-items: center;
  padding-top: 156px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }

.hero h1 {
  margin-bottom: 24px;
  font-size: clamp(48px, 7vw, 92px);
  line-height: 0.98;
  letter-spacing: 0;
}

.lead {
  max-width: 670px;
  color: var(--muted);
  font-size: clamp(18px, 2vw, 23px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.hero-visual {
  position: relative;
  min-height: 560px;
  border-radius: 38px;
  overflow: hidden;
  background:
    radial-gradient(circle at 58% 30%, rgba(255, 255, 255, 0.92), transparent 22%),
    linear-gradient(145deg, #f7f7f8, #d8d9dd);
  box-shadow: var(--shadow);
}

.floating-card,
.placeholder {
  border: 1px solid rgba(255, 255, 255, 0.88);
  border-radius: var(--radius);
  background: linear-gradient(145deg, #f8f8fa, #d8d9de);
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.9), 0 24px 60px rgba(0, 0, 0, 0.09);
}

.box-wide { position: absolute; right: 58px; bottom: 84px; width: 320px; height: 170px; }
.box-tall { position: absolute; right: 132px; top: 82px; width: 210px; height: 260px; }
.box-small { position: absolute; left: 58px; bottom: 138px; width: 160px; height: 132px; }
.cube-wire {
  position: absolute;
  left: 80px;
  top: 96px;
  width: 180px;
  height: 180px;
  border: 2px solid rgba(88, 88, 92, 0.2);
  border-radius: 34px;
  transform: rotate(-8deg);
}

.section-heading {
  max-width: 820px;
  margin-bottom: 42px;
}

.section-heading.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-heading h2 {
  margin-bottom: 14px;
  font-size: clamp(36px, 5vw, 68px);
  line-height: 1.04;
  letter-spacing: 0;
}

.section-heading p {
  color: var(--muted);
  font-size: 19px;
}

.featured-product {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.72fr);
  gap: 42px;
  align-items: center;
  padding: clamp(32px, 5vw, 68px);
  border-radius: 38px;
  background: #f5f5f7;
}

.product-badge {
  display: inline-flex;
  margin-bottom: 22px;
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--green);
  background: rgba(47, 111, 94, 0.1);
  font-weight: 700;
  font-size: 13px;
}

.featured-product h3 {
  font-size: clamp(34px, 4vw, 58px);
  line-height: 1.04;
}

.featured-product p {
  color: var(--muted);
  font-size: 18px;
}

.package-large { min-height: 360px; }

.product-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 18px;
  margin-top: 20px;
}

.product-card {
  display: flex;
  flex-direction: column;
  min-height: 470px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: #fff;
  box-shadow: 0 14px 38px rgba(0, 0, 0, 0.04);
}

.product-card.primary-card {
  border-color: rgba(18, 48, 74, 0.18);
  background: linear-gradient(180deg, #fff, #f5f8fb);
}

.product-card .placeholder {
  height: 150px;
  margin-bottom: 22px;
}

.product-card h3 {
  margin-bottom: 4px;
  font-size: 21px;
}

.product-card h4 {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 14px;
}

.product-card p {
  color: var(--muted);
  font-size: 14px;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  margin-bottom: 18px;
}

.tags span,
.material-list span {
  padding: 7px 10px;
  border-radius: 999px;
  color: #57575c;
  background: #f2f2f4;
  font-size: 12px;
  font-weight: 600;
}

.product-card a {
  color: var(--deep-blue);
  font-weight: 700;
  font-size: 14px;
}

.bag { border-radius: 18px 18px 30px 30px; }
.rigid { border-radius: 28px; }
.eco { background: linear-gradient(145deg, #f8f9f8, #dce3df); }
.label { height: 120px !important; border-radius: 999px; }

.product-detail {
  display: grid;
  grid-template-columns: minmax(360px, 0.9fr) minmax(380px, 1fr);
  gap: 48px;
  align-items: center;
}

.detail-box { min-height: 560px; }

.detail-panel {
  padding: clamp(28px, 4vw, 56px);
  border-radius: 34px;
  background: #f5f5f7;
}

.detail-panel h2 {
  font-size: clamp(34px, 4vw, 56px);
  line-height: 1;
}

dl {
  display: grid;
  gap: 1px;
  margin: 28px 0;
  overflow: hidden;
  border-radius: 20px;
  background: #dedee3;
}

dl div {
  display: grid;
  grid-template-columns: 0.9fr 1fr;
  gap: 18px;
  padding: 14px 16px;
  background: #fff;
}

dt {
  color: var(--muted);
  font-size: 13px;
}

dd {
  margin: 0;
  font-weight: 650;
}

.muted-section,
.quote-section {
  width: 100%;
  max-width: none;
  padding-left: max(22px, calc((100% - 1240px) / 2));
  padding-right: max(22px, calc((100% - 1240px) / 2));
  background: var(--soft);
}

.application-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 14px;
}

.application-grid article {
  padding: 14px;
  border-radius: 24px;
  background: #fff;
}

.mini {
  height: 118px;
  margin-bottom: 18px;
  border-radius: 20px;
}

.application-grid h3 {
  margin-bottom: 2px;
  font-size: 17px;
}

.application-grid p {
  color: var(--muted);
  font-size: 13px;
}

.process-line {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.process-line li {
  min-height: 190px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: linear-gradient(180deg, #fff, #f7f7f8);
}

.process-line span {
  display: inline-flex;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  margin-bottom: 38px;
  border-radius: 50%;
  color: #fff;
  background: var(--ink);
  font-size: 12px;
  font-weight: 800;
}

.process-line p,
.capability-grid p {
  color: var(--muted);
}

.dark-section {
  width: 100%;
  max-width: none;
  padding-left: max(22px, calc((100% - 1240px) / 2));
  padding-right: max(22px, calc((100% - 1240px) / 2));
  color: #fff;
  background: #111113;
}

.dark-section .eyebrow,
.dark-section .section-heading p {
  color: #a1a1a6;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.capability-grid article {
  min-height: 160px;
  padding: 22px;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 24px;
  background: rgba(255,255,255,0.05);
}

.line-icon {
  display: block;
  width: 42px;
  height: 42px;
  margin-bottom: 28px;
  border: 2px solid #777;
  border-radius: 14px;
}

.eco-section {
  text-align: center;
}

.material-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  max-width: 760px;
  margin: 28px auto 0;
}

.quote-form {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  padding: clamp(22px, 4vw, 42px);
  border-radius: 34px;
  background: #fff;
  box-shadow: var(--shadow);
}

.quote-form label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.quote-form input,
.quote-form textarea,
.quote-form select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 13px 14px;
  color: var(--ink);
  background: #f7f7f8;
  font: inherit;
}

.quote-form .wide {
  grid-column: span 2;
}

.quote-form button {
  grid-column: span 2;
}

.form-note {
  grid-column: span 2;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.faq-list {
  max-width: 920px;
  margin: 0 auto;
  display: grid;
  gap: 12px;
}

details {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
  overflow: hidden;
}

summary {
  cursor: pointer;
  padding: 22px 24px;
  font-weight: 750;
}

details p {
  margin: 0;
  padding: 0 24px 24px;
  color: var(--muted);
}

.site-footer {
  display: grid;
  grid-template-columns: 1.8fr 0.8fr 0.8fr 1fr;
  gap: 34px;
  padding: 72px max(22px, calc((100% - 1240px) / 2));
  color: rgba(255,255,255,0.72);
  background: #080808;
}

.site-footer h2,
.site-footer h3 {
  color: #fff;
}

.site-footer a,
.site-footer p {
  display: block;
  margin: 0 0 10px;
  color: rgba(255,255,255,0.72);
}

.copyright {
  grid-column: 1 / -1;
  padding-top: 30px;
  border-top: 1px solid rgba(255,255,255,0.1);
}

@media (max-width: 1120px) {
  .glass-nav {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .nav-links {
    order: 3;
    width: 100%;
    overflow-x: auto;
  }

  .hero,
  .featured-product,
  .product-detail {
    grid-template-columns: 1fr;
  }

  .product-grid,
  .application-grid,
  .capability-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .process-line,
  .quote-form,
  .site-footer {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .glass-nav {
    top: 10px;
    width: calc(100% - 20px);
    border-radius: 20px;
  }

  .brand strong { font-size: 12px; }
  .nav-actions { width: 100%; }
  .lang-toggle, .quote-pill { flex: 1; padding: 0 10px; }

  .section-shell {
    width: min(100% - 28px, 1240px);
    padding: 72px 0;
  }

  .hero {
    min-height: auto;
    padding-top: 178px;
  }

  .hero h1 {
    font-size: 46px;
  }

  .hero-visual {
    min-height: 390px;
    border-radius: 28px;
  }

  .box-wide { width: 220px; height: 124px; right: 24px; bottom: 64px; }
  .box-tall { width: 148px; height: 190px; right: 68px; top: 54px; }
  .box-small { width: 110px; height: 92px; left: 28px; bottom: 98px; }
  .cube-wire { width: 110px; height: 110px; left: 36px; top: 72px; }

  .product-grid,
  .application-grid,
  .capability-grid,
  .process-line,
  .quote-form,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .quote-form .wide,
  .quote-form button,
  .form-note {
    grid-column: auto;
  }

  dl div {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}