:root {
  --ink: #171713;
  --ink-soft: #4e4a42;
  --muted: #767066;
  --paper: #f7f7f3;
  --surface: #ffffff;
  --surface-2: #eef3ef;
  --line: rgba(23, 23, 19, 0.12);
  --green: #1f6b5e;
  --green-dark: #17483f;
  --ox: #862d28;
  --brass: #b77a2d;
  --shadow: 0 24px 70px rgba(21, 24, 20, 0.15);
  --radius: 8px;
  --header-height: 72px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC", Arial, sans-serif;
  line-height: 1.6;
  letter-spacing: 0;
}

body.modal-open {
  overflow: hidden;
}

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

img {
  display: block;
  max-width: 100%;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

[data-lucide] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-style: normal;
  line-height: 1;
}

.page-shell {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--header-height);
  background: rgba(247, 247, 243, 0.88);
  border-bottom: 1px solid rgba(255, 255, 255, 0.24);
  backdrop-filter: blur(18px);
  transition: box-shadow 0.2s ease, background 0.2s ease;
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 12px 35px rgba(21, 24, 20, 0.08);
}

.header-inner {
  width: min(1240px, calc(100% - 32px));
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand-text {
  display: grid;
  gap: 1px;
  min-width: 154px;
}

.brand-kicker {
  color: var(--green);
  font-size: 10px;
  font-weight: 800;
}

.brand-name {
  color: var(--ink);
  font-size: 20px;
  font-weight: 800;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 5px;
  border: 1px solid rgba(23, 23, 19, 0.08);
  background: rgba(255, 255, 255, 0.62);
  border-radius: var(--radius);
}

.site-nav a {
  padding: 8px 12px;
  color: var(--ink-soft);
  font-size: 14px;
  border-radius: 6px;
  transition: background 0.2s ease, color 0.2s ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  background: var(--green);
  color: #fff;
}

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

.icon-button,
.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.icon-button:hover,
.primary-button:hover,
.secondary-button:hover {
  transform: translateY(-1px);
}

.icon-button svg,
.primary-button svg,
.secondary-button svg,
.contact-card svg,
.product-card svg,
.back-top svg {
  width: 18px;
  height: 18px;
  stroke-width: 2;
}

.phone-button {
  padding: 0 14px;
  background: var(--ink);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: var(--radius);
  cursor: pointer;
}

.hero {
  position: relative;
  min-height: 82svh;
  display: grid;
  align-items: center;
  overflow: hidden;
  background: #12120e;
}

.hero-media,
.hero-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-media img {
  object-fit: cover;
  object-position: center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(14, 16, 13, 0.84), rgba(14, 16, 13, 0.42) 46%, rgba(14, 16, 13, 0.14) 75%),
    linear-gradient(180deg, rgba(14, 16, 13, 0.1), rgba(14, 16, 13, 0.55));
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: calc(var(--header-height) + 56px) 0 62px;
  color: #fff;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--brass);
  font-size: 13px;
  font-weight: 800;
}

.hero .eyebrow {
  color: #f0c275;
}

.hero h1 {
  width: min(720px, 100%);
  margin: 0;
  font-size: clamp(40px, 7vw, 78px);
  line-height: 1.08;
  font-weight: 900;
}

.hero h1 span {
  display: block;
}

.hero-lead {
  width: min(610px, 100%);
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: clamp(17px, 2vw, 20px);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0 0;
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 6px 12px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  color: #fff;
  font-size: 14px;
  backdrop-filter: blur(14px);
}

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

.primary-button,
.secondary-button {
  padding: 0 18px;
  font-weight: 800;
}

.primary-button {
  background: var(--green);
  color: #fff;
}

.primary-button:hover {
  background: var(--green-dark);
}

.secondary-button {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.3);
  color: #fff;
}

.secondary-button:hover {
  background: rgba(255, 255, 255, 0.2);
}

.secondary-button.light {
  background: #fff;
  color: var(--ink);
  border-color: rgba(255, 255, 255, 0.3);
}

.primary-button.dark {
  background: #fff;
  color: var(--ink);
}

.facts-band {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.facts-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
}

.fact-item {
  display: grid;
  gap: 5px;
  min-height: 118px;
  padding: 24px;
  background: var(--surface);
}

.fact-item span {
  color: var(--muted);
  font-size: 14px;
}

.fact-item strong {
  color: var(--ink);
  font-size: clamp(22px, 2.5vw, 30px);
  line-height: 1.15;
}

.section {
  padding: clamp(72px, 9vw, 118px) 0;
}

.section-grid {
  display: grid;
  align-items: center;
  gap: clamp(34px, 6vw, 76px);
}

.two-columns {
  grid-template-columns: minmax(0, 0.95fr) minmax(340px, 1.05fr);
}

.image-left {
  grid-template-columns: minmax(320px, 0.98fr) minmax(0, 1fr);
}

.section-copy h2,
.section-heading h2,
.contact-section h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(30px, 4.8vw, 52px);
  line-height: 1.14;
}

.section-copy p,
.section-heading p,
.contact-section p {
  color: var(--ink-soft);
  font-size: 17px;
}

.section-copy p {
  width: min(640px, 100%);
}

.section-heading {
  margin-bottom: 38px;
}

.section-heading p {
  width: min(720px, 100%);
}

.section-heading.compact {
  margin-bottom: 30px;
}

.info-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.info-list {
  margin: 0;
}

.info-list div {
  display: grid;
  grid-template-columns: 128px 1fr;
  gap: 20px;
  padding: 20px 22px;
  border-bottom: 1px solid var(--line);
}

.info-list div:last-child {
  border-bottom: 0;
}

.info-list dt {
  color: var(--muted);
  font-weight: 700;
}

.info-list dd {
  margin: 0;
  color: var(--ink);
  font-weight: 700;
}

.text-tool {
  margin-left: 8px;
  padding: 2px 8px;
  border: 1px solid rgba(31, 107, 94, 0.25);
  background: rgba(31, 107, 94, 0.08);
  color: var(--green);
  border-radius: 5px;
  cursor: pointer;
}

.products-section {
  background: var(--surface-2);
}

.product-showcase {
  display: grid;
  grid-template-columns: minmax(320px, 0.98fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 46px);
  align-items: stretch;
}

.showcase-image,
.operations-image {
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.showcase-image img,
.operations-image img {
  width: 100%;
  height: 100%;
  min-height: 420px;
  object-fit: cover;
}

.product-card-grid {
  display: grid;
  gap: 14px;
}

.product-card {
  width: 100%;
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 4px 16px;
  align-items: center;
  min-height: 132px;
  padding: 22px;
  border: 1px solid rgba(23, 23, 19, 0.1);
  background: #fff;
  color: var(--ink);
  text-align: left;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.product-card:hover {
  transform: translateY(-2px);
  border-color: rgba(31, 107, 94, 0.36);
  box-shadow: 0 18px 38px rgba(21, 24, 20, 0.12);
}

.product-card svg {
  grid-row: 1 / span 2;
  width: 34px;
  height: 34px;
  padding: 7px;
  color: var(--green);
  background: rgba(31, 107, 94, 0.1);
  border-radius: var(--radius);
}

.product-card span {
  color: var(--brass);
  font-size: 14px;
  font-weight: 800;
}

.product-card strong {
  font-size: clamp(18px, 2vw, 23px);
  line-height: 1.3;
}

.model-section {
  background: var(--paper);
}

.mode-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 28px 0 16px;
}

.mode-tab {
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid rgba(23, 23, 19, 0.12);
  background: #fff;
  color: var(--ink-soft);
  border-radius: var(--radius);
  cursor: pointer;
}

.mode-tab.is-active {
  background: var(--ox);
  color: #fff;
  border-color: var(--ox);
}

.mode-detail {
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.mode-detail h3 {
  margin: 0 0 8px;
  font-size: 22px;
}

.mode-detail p {
  margin: 0;
}

.process-list {
  display: grid;
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.process-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 48px;
  padding: 10px 0;
  color: var(--ink-soft);
  border-bottom: 1px solid rgba(23, 23, 19, 0.1);
  font-weight: 700;
}

.process-list span {
  color: var(--green);
  font-weight: 900;
}

.disclosure-section {
  background: #fff;
}

.disclosure-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.disclosure-card {
  min-height: 188px;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.disclosure-card[open] {
  border-color: rgba(31, 107, 94, 0.3);
  box-shadow: 0 18px 42px rgba(21, 24, 20, 0.1);
}

.disclosure-card summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 66px;
  padding: 18px;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  font-weight: 900;
}

.disclosure-card summary::-webkit-details-marker {
  display: none;
}

.disclosure-card summary svg {
  width: 18px;
  height: 18px;
  color: var(--green);
  transition: transform 0.2s ease;
}

.disclosure-card[open] summary svg {
  transform: rotate(180deg);
}

.disclosure-card p {
  margin: 0;
  padding: 0 18px 20px;
  color: var(--ink-soft);
}

.contact-section {
  padding: clamp(72px, 9vw, 110px) 0;
  background: var(--green-dark);
  color: #fff;
}

.contact-section .eyebrow {
  color: #f0c275;
}

.contact-section h2,
.contact-section p {
  color: #fff;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  align-items: end;
}

.contact-layout p {
  width: min(690px, 100%);
  color: rgba(255, 255, 255, 0.78);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.9fr 0.9fr;
  gap: 14px;
  margin-top: 34px;
}

.contact-card {
  min-height: 220px;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
}

.contact-card > svg {
  width: 28px;
  height: 28px;
  color: #f0c275;
}

.contact-card h3 {
  margin: 20px 0 8px;
  font-size: 22px;
}

.contact-card p {
  margin: 0 0 18px;
  color: rgba(255, 255, 255, 0.75);
}

.contact-card a,
.contact-card button {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  padding: 0 13px;
  border: 1px solid rgba(255, 255, 255, 0.26);
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border-radius: var(--radius);
  cursor: pointer;
}

.site-footer {
  background: #121410;
  color: rgba(255, 255, 255, 0.72);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 0;
  font-size: 14px;
}

.footer-inner p {
  margin: 0;
}

.product-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.product-modal.is-open {
  display: flex;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 12, 10, 0.68);
  backdrop-filter: blur(8px);
}

.modal-panel {
  position: relative;
  z-index: 1;
  width: min(620px, 100%);
  padding: clamp(24px, 5vw, 38px);
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: var(--radius);
  cursor: pointer;
}

.modal-tag {
  display: inline-flex;
  margin-bottom: 12px;
  color: var(--green);
  font-weight: 900;
}

.modal-panel h2 {
  margin: 0 44px 12px 0;
  font-size: clamp(28px, 5vw, 42px);
  line-height: 1.15;
}

.modal-panel p {
  color: var(--ink-soft);
}

.modal-panel ul {
  display: grid;
  gap: 8px;
  margin: 18px 0 26px;
  padding-left: 20px;
  color: var(--ink-soft);
}

.back-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 40;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 0;
  background: var(--ink);
  color: #fff;
  border-radius: var(--radius);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.back-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 22px;
  z-index: 120;
  min-width: min(360px, calc(100% - 40px));
  max-width: calc(100% - 40px);
  padding: 12px 16px;
  background: rgba(18, 20, 16, 0.94);
  color: #fff;
  text-align: center;
  border-radius: var(--radius);
  box-shadow: 0 14px 35px rgba(0, 0, 0, 0.22);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (max-width: 980px) {
  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 10px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .menu-toggle {
    display: grid;
    place-items: center;
  }

  .two-columns,
  .image-left,
  .product-showcase,
  .contact-layout,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .contact-actions {
    justify-content: flex-start;
  }

  .disclosure-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .facts-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 680px) {
  :root {
    --header-height: 66px;
  }

  .page-shell,
  .header-inner {
    width: min(100% - 24px, 1180px);
  }

  .brand-kicker {
    display: none;
  }

  .brand-name {
    font-size: 18px;
  }

  .phone-button span {
    display: none;
  }

  .phone-button {
    width: 44px;
    padding: 0;
  }

  .hero {
    min-height: 78svh;
  }

  .hero-content {
    padding: calc(var(--header-height) + 38px) 0 44px;
  }

  .hero h1 {
    font-size: clamp(34px, 10.4vw, 42px);
  }

  .hero-meta span {
    width: 100%;
  }

  .hero-actions,
  .contact-actions {
    width: 100%;
  }

  .hero-actions a,
  .contact-actions a,
  .contact-actions button {
    width: 100%;
  }

  .facts-grid,
  .disclosure-grid {
    grid-template-columns: 1fr;
  }

  .fact-item {
    min-height: 96px;
    padding: 18px;
  }

  .info-list div {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .showcase-image img,
  .operations-image img {
    min-height: 280px;
  }

  .product-card {
    grid-template-columns: 38px 1fr;
    min-height: 118px;
    padding: 18px;
  }

  .product-card svg {
    width: 32px;
    height: 32px;
  }

  .footer-inner {
    display: grid;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}