/*
  设计哲学：工业产品摄影式企业官网美学。
  本文件为纯 CSS 版本，不依赖 Tailwind、React 或任何构建工具。
*/

:root {
  --gold: #d6a12b;
  --gold-dark: #b77d05;
  --ink: #151512;
  --muted: #4f5452;
  --paper: #ffffff;
  --footer: #101719;
  --soft-bg: #f6f6f2;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  color: var(--ink);
  background: var(--soft-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: geometricPrecision;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
.site-shell { min-height: 100vh; overflow-x: hidden; background: var(--soft-bg); }

.topbar {
  position: sticky; top: 0; z-index: 50; height: 72px;
  padding: 0 clamp(32px, 4.7vw, 56px);
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(255,255,255,0.96);
  box-shadow: 0 1px 0 rgba(20,20,20,0.08);
  backdrop-filter: blur(14px);
}
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: 190px; }
.brand-mark {
  width: 34px; height: 38px; display: grid; place-items: center;
  border: 2px solid var(--gold); color: var(--gold); font-weight: 900; font-size: 26px;
  line-height: 1; border-radius: 8px 8px 15px 15px; transform: skew(-5deg);
  box-shadow: inset 0 -9px 0 rgba(214,161,43,0.12);
}
.brand-copy { display: flex; flex-direction: column; line-height: 1.05; }
.brand-copy strong { font-size: 22px; letter-spacing: -0.055em; font-weight: 900; color: #111; }
.brand-copy em { font-size: 9px; font-style: italic; font-weight: 700; color: #111; }
/* 顶部导航与下拉菜单统一使用 main.css 中的全局样式，避免覆盖 factory 页面基准效果。 */
.nav-actions { display: flex; align-items: center; gap: 18px; color: #111; }
.lang-btn, .icon-btn { border: 0; background: transparent; display: inline-flex; align-items: center; gap: 4px; color: #111; padding: 8px; }
.mobile-only { display: none; }
.icon-search { width: 20px; height: 20px; border: 2px solid #111; border-radius: 50%; position: relative; display: inline-block; }
.icon-search::after { content: ""; width: 8px; height: 2px; background: #111; position: absolute; right: -6px; bottom: -3px; transform: rotate(45deg); border-radius: 2px; }
.menu-lines, .menu-lines::before, .menu-lines::after { display: block; width: 22px; height: 2px; background: #111; border-radius: 2px; position: relative; }
.menu-lines::before, .menu-lines::after { content: ""; position: absolute; left: 0; }
.menu-lines::before { top: -7px; } .menu-lines::after { top: 7px; }

.hero-section { position: relative; min-height: 362px; display: flex; align-items: stretch; color: white; overflow: hidden; background: #070a0b; }
.hero-visual { position: absolute; inset: 0; background: radial-gradient(circle at 70% 44%, rgba(214,161,43,0.24), transparent 20%), radial-gradient(circle at 88% 18%, rgba(104,116,113,0.24), transparent 24%), linear-gradient(100deg, rgba(0,0,0,0.95) 0%, rgba(5,8,9,0.91) 35%, rgba(6,9,10,0.76) 62%, rgba(0,0,0,0.78) 100%), repeating-linear-gradient(90deg, rgba(255,255,255,0.035) 0 1px, transparent 1px 64px), repeating-linear-gradient(0deg, transparent 0 52px, rgba(214,161,43,0.05) 52px 54px), linear-gradient(135deg, #0b1011, #20231f 46%, #090909 100%); }
.hero-visual .hero-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 0; }
.hero-visual::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px); background-size: 48px 48px; mask-image: linear-gradient(90deg, transparent, black 48%, black); }
.hero-visual::after { content: ""; position: absolute; right: 9%; bottom: 54px; width: 520px; height: 210px; background: linear-gradient(90deg, transparent 0 8%, rgba(255,255,255,0.12) 8% 9%, transparent 9% 18%, rgba(255,255,255,0.08) 18% 19%, transparent 19%), repeating-linear-gradient(90deg, transparent 0 46px, rgba(214,161,43,0.18) 46px 51px), linear-gradient(180deg, rgba(255,255,255,0.08), rgba(0,0,0,0.1)); opacity: 0.48; clip-path: polygon(0 35%, 18% 35%, 18% 12%, 30% 12%, 30% 35%, 50% 35%, 50% 5%, 62% 5%, 62% 35%, 100% 35%, 100% 100%, 0 100%); filter: blur(0.2px); }
.hero-rig { position: absolute; right: 8%; background: linear-gradient(160deg, rgba(214,161,43,0.85), rgba(37,42,42,0.92)); box-shadow: 0 22px 50px rgba(0,0,0,0.45), inset 0 1px 0 rgba(255,255,255,0.35); border: 1px solid rgba(255,255,255,0.16); }
.rig-a { width: 430px; height: 84px; bottom: 72px; border-radius: 999px 18px 18px 999px; transform: skewX(-8deg); opacity: 0.72; }
.rig-b { width: 240px; height: 240px; bottom: 68px; right: 22%; border-radius: 50%; opacity: 0.42; background: radial-gradient(circle, rgba(214,161,43,0.35), rgba(39,42,39,0.65) 55%, rgba(0,0,0,0.25) 56%); }
.rig-c { width: 124px; height: 235px; bottom: 56px; right: 8%; border-radius: 18px 18px 7px 7px; background: linear-gradient(180deg, #d9d3c8, #6d706b 48%, var(--gold)); opacity: 0.76; }
.hero-road { position: absolute; inset: auto 0 0 0; height: 95px; background: linear-gradient(180deg, transparent, rgba(0,0,0,0.72)), repeating-linear-gradient(100deg, rgba(214,161,43,0.32) 0 2px, transparent 2px 120px); opacity: 0.72; }
.hero-badge, .scene-label, .map-label { position: absolute; right: 26px; bottom: 18px; font-size: 10px; letter-spacing: 0.16em; color: rgba(255,255,255,0.45); border: 1px solid rgba(255,255,255,0.15); padding: 6px 9px; border-radius: 99px; }
.hero-content { position: relative; z-index: 2; width: min(1180px, calc(100% - 88px)); margin: 0 auto; padding: 28px 0 34px; display: flex; flex-direction: column; justify-content: center; }
.breadcrumb { display: flex; align-items: center; gap: 8px; margin-bottom: 34px; font-size: 14px; color: rgba(255,255,255,0.78); }
.hero-content h1 { margin: 0 0 12px; max-width: 720px; font-size: clamp(38px, 4.55vw, 56px); line-height: 1.06; font-weight: 900; letter-spacing: -0.055em; text-shadow: 0 18px 45px rgba(0,0,0,0.45); animation: riseIn 650ms ease both; }
.hero-subtitle { margin: 0 0 24px; font-family: "Arial Narrow", Arial, sans-serif; font-size: clamp(17px, 2vw, 23px); font-weight: 700; letter-spacing: -0.02em; color: #f4f1e8; animation: riseIn 750ms ease 80ms both; }
.hero-description { margin: 0 0 38px; max-width: 640px; font-size: 17px; line-height: 1.82; font-weight: 500; color: rgba(255,255,255,0.92); animation: riseIn 750ms ease 140ms both; }
.advantage-row { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(22px, 4vw, 64px); max-width: 1040px; }
.advantage-item { display: flex; align-items: center; gap: 15px; color: rgba(255,255,255,0.94); animation: riseIn 700ms ease both; }
.advantage-item strong { display: block; margin-bottom: 4px; font-size: 15px; font-weight: 800; }
.advantage-item span:last-child { display: block; font-size: 13px; color: rgba(255,255,255,0.68); }
.line-icon { width: 37px; height: 37px; flex: none; border: 2px solid var(--gold); border-radius: 10px; position: relative; filter: drop-shadow(0 0 10px rgba(214,161,43,0.18)); }
.line-icon::after { content: ""; position: absolute; inset: 9px; border: 2px solid var(--gold); border-radius: 50%; }
.line-icon.building::after { border-radius: 2px; border-top-width: 6px; }
.line-icon.wrench::after { border-radius: 99px; transform: rotate(-35deg); }
.line-icon.globe::after { border-radius: 50%; }

.hero-features { display: grid; grid-template-columns: repeat(4, minmax(160px, 1fr)); gap: 18px 28px; max-width: 900px; }
.hero-features article { display: flex; align-items: center; gap: 10px; min-width: 0; }
.hero-features article > div { flex: 1 1 120px; min-width: 0; }
.hero-features strong { display: block; font-size: 14px; font-weight: 700; color: #fff; white-space: nowrap; }
.hero-features span { display: block; margin-top: 3px; font-size: 11px; color: rgba(255,255,255,.72); white-space: nowrap; }
.hero-features .feature-img { width: 38px; height: 38px; object-fit: contain; flex: 0 0 auto; }

.industry-section { padding: 39px clamp(22px, 2.5vw, 32px) 58px; background: #fff; }
.section-heading { text-align: center; margin-bottom: 27px; }
.section-heading h2 { margin: 0; font-size: clamp(31px, 3vw, 40px); font-weight: 850; letter-spacing: -0.045em; color: var(--ink); }
.section-heading span { display: block; width: 38px; height: 4px; margin: 15px auto 0; background: var(--gold); border-radius: 99px; }
.industry-grid { width: 100%; max-width: 1248px; margin: 0 auto; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 14px; }
.industry-card { position: relative; overflow: hidden; min-height: 565px; background: #fff; border: 1px solid rgba(16,18,18,0.1); box-shadow: 0 18px 36px rgba(26,30,30,0.07); border-radius: 10px; transition: transform 260ms ease, box-shadow 260ms ease, border-color 260ms ease; }
.industry-card:hover { transform: translateY(-9px); border-color: rgba(214,161,43,0.45); box-shadow: 0 26px 55px rgba(26,30,30,0.14); }
.placeholder-scene { position: relative; height: 194px; overflow: hidden; background: linear-gradient(135deg, #2c3231, #111), radial-gradient(circle at 70% 24%, rgba(214,161,43,0.38), transparent 30%); }
.placeholder-scene::before { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 50%, rgba(0,0,0,0.42)), repeating-linear-gradient(90deg, rgba(255,255,255,0.08) 0 1px, transparent 1px 28px); opacity: 0.75; }
.placeholder-scene.power { background: linear-gradient(135deg, #263231, #111a1d), radial-gradient(circle at 16% 12%, #d6a12b, transparent 34%); }
.placeholder-scene.construction { background: linear-gradient(135deg, #564016, #171511), radial-gradient(circle at 80% 18%, #f2c14d, transparent 32%); }
.placeholder-scene.mining { background: linear-gradient(135deg, #4a3322, #10100d), radial-gradient(circle at 36% 28%, #c58725, transparent 32%); }
.placeholder-scene.auto { background: linear-gradient(135deg, #1f2629, #0b0e10), radial-gradient(circle at 70% 25%, #d6a12b, transparent 31%); }
.placeholder-scene.metal { background: linear-gradient(135deg, #40120a, #0d0b0b), radial-gradient(circle at 66% 34%, #ff8b1f, transparent 35%); }
.scene-grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,0.07) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.07) 1px, transparent 1px); background-size: 34px 34px; opacity: 0.32; }
.scene-sun { position: absolute; width: 70px; height: 70px; right: 24px; top: 22px; border-radius: 50%; background: radial-gradient(circle, rgba(255,198,81,0.75), transparent 68%); }
.scene-machine { position: absolute; bottom: 27px; border-radius: 8px; background: linear-gradient(145deg, rgba(214,161,43,0.86), rgba(18,20,20,0.96)); box-shadow: inset 0 1px 0 rgba(255,255,255,0.28), 0 12px 24px rgba(0,0,0,0.3); }
.scene-machine.one { width: 112px; height: 60px; left: 27px; transform: skewX(-12deg); }
.scene-machine.two { width: 76px; height: 108px; right: 34px; bottom: 22px; opacity: 0.88; }
.scene-label { left: 15px; right: auto; bottom: 12px; color: rgba(255,255,255,0.28); transform: scale(0.86); transform-origin: left bottom; }
.placeholder-scene::after { content: ""; position: absolute; left: 10%; right: 8%; bottom: 27px; height: 96px; background: radial-gradient(circle at 14% 77%, #0b0d0d 0 18px, transparent 19px), radial-gradient(circle at 76% 78%, #0b0d0d 0 18px, transparent 19px), linear-gradient(115deg, transparent 0 11%, rgba(246,179,40,0.85) 11% 34%, transparent 34%), linear-gradient(0deg, rgba(12,13,13,0.92), rgba(46,45,39,0.84)); border-radius: 18px 18px 8px 8px; box-shadow: 0 18px 26px rgba(0,0,0,0.28); transform: skewX(-5deg); }
.placeholder-scene.metal::after { background: radial-gradient(circle at 72% 34%, rgba(255,139,31,0.95) 0 22px, transparent 23px), radial-gradient(circle at 52% 52%, rgba(255,185,74,0.58), transparent 42%), linear-gradient(100deg, rgba(12,13,13,0.92), rgba(72,20,9,0.9)); }
.placeholder-scene.power::after { clip-path: polygon(0 68%, 10% 68%, 13% 18%, 21% 18%, 24% 68%, 44% 68%, 47% 0, 58% 0, 61% 68%, 100% 68%, 100% 100%, 0 100%); }
.placeholder-scene.auto::after { border-radius: 42px 52px 12px 12px; height: 76px; bottom: 38px; }
.placeholder-scene .scene-machine { z-index: 2; opacity: 0.76; }
.placeholder-scene { display: none; }
.industry-image { position: relative; height: 194px; overflow: hidden; background: linear-gradient(135deg, #2c3231, #111); }
.industry-image img { width: 100%; height: 100%; object-fit: cover; display: block; }
.industry-icon {
  position: absolute;
  top: 168px;
  left: 24px;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  overflow: hidden;
  display: block;
  background: transparent;
  border: 5px solid #fff;
  box-shadow: 0 12px 24px rgba(0,0,0,0.16);
  transition: transform 260ms ease;
  z-index: 2;
}
.industry-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: 50%;
}
.industry-card:hover .industry-icon { transform: rotate(4deg) scale(1.04); }
.industry-body { padding: 51px 20px 22px; }
.industry-body h3 { margin: 0 0 2px; font-size: 23px; font-weight: 850; letter-spacing: -0.04em; color: var(--ink); }
.industry-en { margin: 0 0 20px; font-size: 14px; color: var(--muted); font-family: "Arial Narrow", Arial, sans-serif; }
.industry-desc { min-height: 88px; margin: 0 0 19px; font-size: 13px; line-height: 1.72; color: #484d4a; }
.industry-body ul { list-style: none; padding: 0; margin: 0 0 30px; display: grid; gap: 11px; }
.industry-body li { position: relative; padding-left: 19px; font-size: 14px; color: #343836; }
.industry-body li::before { content: ""; position: absolute; left: 0; top: 9px; width: 5px; height: 5px; border-radius: 50%; background: var(--gold); }
.text-link { display: inline-flex; align-items: center; gap: 5px; color: var(--gold-dark); font-weight: 800; font-size: 14px; transition: gap 180ms ease; }
.text-link:hover { gap: 10px; }

.contact-panel { min-height: 246px; padding: 43px clamp(40px, 7vw, 88px); display: grid; grid-template-columns: minmax(310px, 0.88fr) minmax(360px, 1.12fr); gap: 35px; align-items: center; background: linear-gradient(100deg, #f1f2ec 0%, #f7f7f3 47%, #eef0ea 100%); border-top: 1px solid rgba(0,0,0,0.05); }
.contact-copy h2 { margin: 0 0 15px; font-size: clamp(28px, 3vw, 36px); font-weight: 850; letter-spacing: -0.045em; }
.contact-copy p { margin: 0 0 31px; max-width: 620px; color: #4b504c; font-size: 17px; line-height: 1.78; }
.contact-actions { display: flex; gap: 26px; flex-wrap: wrap; }
.primary-cta, .secondary-cta { height: 52px; min-width: 156px; padding: 0 25px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; border-radius: 7px; font-weight: 800; transition: transform 220ms ease, box-shadow 220ms ease, background 220ms ease; }
.primary-cta { background: var(--gold); color: #161410; box-shadow: 0 16px 30px rgba(214,161,43,0.28); }
.secondary-cta { background: #fff; color: #252924; border: 1px solid rgba(21,21,18,0.16); }
.primary-cta:hover, .secondary-cta:hover { transform: translateY(-3px); box-shadow: 0 18px 32px rgba(20,20,20,0.11); }
.world-map-visual { position: relative; height: clamp(218px, 23vw, 288px); min-height: 218px; border-radius: 16px; overflow: hidden; background: linear-gradient(180deg, rgba(255,255,255,0.36), rgba(255,255,255,0.08)); }
.world-map-visual::before { content: ""; position: absolute; inset: 6px 0 0; background: radial-gradient(circle at 18% 42%, rgba(214,161,43,0.12), transparent 14%), radial-gradient(circle at 49% 66%, rgba(214,161,43,0.10), transparent 16%), radial-gradient(circle at 75% 34%, rgba(214,161,43,0.09), transparent 18%); pointer-events: none; }
.solution-world-map { position: relative; z-index: 1; display: block; width: 100%; height: 100%; color: var(--gold); }
.solution-world-map .map-dot-pixel { fill: rgba(93,101,96,0.18); }
.solution-world-map .map-land path { fill: url(#solutionMapDots); opacity: 0.96; }
.solution-world-map .map-routes path { fill: none; stroke: var(--gold); stroke-width: 2.2; stroke-linecap: round; stroke-dasharray: 2 9; opacity: 0.62; }
.solution-world-map .network-node { color: var(--gold); filter: drop-shadow(0 8px 16px rgba(20,20,20,0.08)); }
.solution-world-map .node-halo { fill: rgba(214,161,43,0.07); stroke: rgba(214,161,43,0.22); stroke-width: 1; }
.solution-world-map .node-circle { fill: rgba(255,255,255,0.78); stroke: var(--gold); stroke-width: 2.4; }
.solution-world-map .node-icon { fill: none; stroke: currentColor; stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }

.footer { background: var(--footer); color: rgba(255,255,255,0.78); padding: 34px clamp(32px, 5vw, 58px) 0; }
.footer-grid { max-width: 1210px; margin: 0 auto; display: grid; grid-template-columns: 1.55fr repeat(4, 0.75fr) 1.45fr; gap: 42px; padding-bottom: 34px; }
.footer .brand-copy strong, .footer .brand-copy em { color: #fff; }
.footer-brand p { margin: 20px 0 24px; max-width: 260px; font-size: 14px; line-height: 1.8; color: rgba(255,255,255,0.58); }
.socials { display: flex; gap: 14px; }
.socials span { width: 25px; height: 25px; border-radius: 50%; display: grid; place-items: center; background: rgba(255,255,255,0.12); color: white; font-size: 11px; }
.footer-column h4, .footer-contact h4 { margin: 0 0 17px; color: #fff; font-size: 16px; font-weight: 850; }
.footer-column a { display: block; margin-bottom: 11px; font-size: 14px; color: rgba(255,255,255,0.58); transition: color 180ms ease; }
.footer-column a:hover { color: var(--gold); }
.footer-contact p { margin: 0 0 12px; font-size: 14px; line-height: 1.55; color: rgba(255,255,255,0.68); }
.footer-bottom { max-width: 1210px; margin: 0 auto; min-height: 62px; border-top: 1px solid rgba(255,255,255,0.08); display: flex; align-items: center; justify-content: center; gap: 28px; font-size: 13px; color: rgba(255,255,255,0.45); }
.footer-bottom a:hover { color: var(--gold); }

@keyframes riseIn { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: translateY(0); } }

@media (max-width: 1180px) {
  .hero-section { min-height: 390px; }
  .industry-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .industry-card { min-height: 545px; }
  .footer-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
  .topbar { height: 74px; padding: 0 22px; }
  .mobile-only { display: inline-flex; }
  .brand-copy strong { font-size: 20px; }
  .hero-section { min-height: 500px; }
  .hero-content { width: calc(100% - 44px); padding: 32px 0 38px; }
  .breadcrumb { margin-bottom: 34px; }
  .advantage-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero-rig { opacity: 0.36; }
  .hero-visual::after { right: -10%; opacity: 0.26; }
  .industry-section { padding-inline: 18px; }
  .industry-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
  .contact-panel { grid-template-columns: 1fr; padding-inline: 24px; }
}
@media (max-width: 620px) {
  .brand { min-width: auto; }
  .brand-copy em { display: none; }
  .lang-btn { display: none; }
  .hero-section { min-height: 570px; }
  .hero-description { font-size: 16px; margin-bottom: 34px; }
  .advantage-row { grid-template-columns: 1fr; gap: 18px; }
  .industry-grid { grid-template-columns: 1fr; }
  .industry-card { min-height: auto; }
  .placeholder-scene { height: 210px; }
  .industry-image { height: 210px; }
  .industry-icon { top: 182px; }
  .industry-desc { min-height: auto; }
  .contact-actions { gap: 12px; }
  .primary-cta, .secondary-cta { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 25px; }
  .footer-bottom { flex-wrap: wrap; gap: 12px 22px; padding: 18px 0; text-align: center; }
}

.topbar.is-scrolled { box-shadow: 0 8px 24px rgba(0,0,0,0.10); }
.link-pulse { color: var(--gold-dark) !important; }
@media (max-width: 900px) {
  .icon-btn.is-open .menu-lines { background: transparent; }
  .icon-btn.is-open .menu-lines::before { top: 0; transform: rotate(45deg); }
  .icon-btn.is-open .menu-lines::after { top: 0; transform: rotate(-45deg); }
}