:root{--primary:#11458f;--primary-dark:#0a326f;--accent:#0b6eb5;--ink:#171b22;--muted:#69717d;--surface:#f3f4f7;--line:#d9dce2;--white:#fff;font-family:Arial,"Helvetica Neue",sans-serif;color:var(--ink);background:#fff}*{box-sizing:border-box}[hidden]{display:none!important}html{scroll-behavior:smooth}body{margin:0;line-height:1.45}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;display:block}.wrap{width:min(1420px,calc(100% - 72px));margin:auto}.utility{height:34px;background:#f3f5f7;border-bottom:1px solid #e1e4e8}.utility .wrap{height:100%;display:flex;justify-content:flex-end;align-items:center;gap:25px;font-size:13px}.masthead{height:94px;background:#fff}.masthead .wrap{height:100%;display:flex;align-items:center;gap:55px}.logo{width:315px;flex:0 0 auto}.main-nav{display:flex;align-items:center;gap:38px;margin-left:auto}.main-nav a{color:#1b2839;font-weight:700}.search-link{display:inline-flex;align-items:center;justify-content:center;width:46px;height:46px;color:#fff!important;background:var(--primary);font-size:22px}.bluebar{height:67px;background:rgba(17,69,143,0.88);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);color:#fff;position:sticky;top:0;z-index:50;border-bottom:1px solid rgba(255,255,255,0.08)}.bluebar .wrap{height:100%;display:flex;align-items:center;gap:46px}.bluebar a{color:#fff;font-weight:700}.bluebar .contact-nav{margin-left:auto;display:flex;gap:26px}.hero{position:relative;min-height:515px;color:#fff;background-position:center;background-size:cover}.hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,37,86,.78) 0%,rgba(0,37,86,.2) 50%,rgba(0,0,0,.08) 100%)}.hero-industrial{background-image:url(../images/hero-industrial.png)}.hero-people{min-height:500px;background-image:url(../images/hero-people.png);background-position:center}.hero-people:before{background:linear-gradient(90deg,rgba(0,48,93,.52),rgba(0,48,93,0) 60%)}.hero .wrap{position:relative;padding-top:115px}.hero h1{font-size:64px;line-height:1.04;margin:0 0 24px;max-width:760px;font-weight:600}.hero p{font-size:22px;max-width:660px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 23px;background:var(--primary);border:2px solid var(--primary);color:#fff;font-weight:700}.button:hover{text-decoration:none;background:var(--primary-dark)}.button-outline{background:#fff;color:var(--accent);border-color:#81b9df}.button-outline:hover{color:#fff}.intro{padding:56px 0 64px}.intro-grid{display:grid;grid-template-columns:1.6fr .72fr;gap:80px}.intro h2{font-size:52px;font-weight:400;margin:0 0 24px}.intro p{font-size:22px;color:#5c6570;max-width:850px}.contact-card{background:var(--primary);color:#fff;padding:28px 32px;align-self:center}.contact-card h3{font-size:26px;font-weight:400;margin:0 0 20px}.contact-card a{display:block;color:#fff;margin:9px 0}.page-title{background:#f4f4f7;padding:45px 0;border-bottom:1px solid var(--line)}.page-title h1{font-size:46px;margin:0 0 9px}.page-title p{color:var(--muted);margin:0}.catalog-shell{display:grid;grid-template-columns:290px 1fr;gap:48px;padding:54px 0 80px}.filters{border-right:1px solid #aeb4bc;padding-right:35px}.filters h2{font-size:24px;margin:0 0 24px}.filter-block{padding:20px 0;border-top:1px solid var(--line)}.filter-block h3{font-size:16px;margin:0 0 14px}.filter-block label{display:block;margin:11px 0;color:#2f3741}.results-toolbar{display:flex;gap:18px;align-items:center;justify-content:space-between;border-bottom:1px solid #9da4ac;padding-bottom:24px}.search-form{display:flex;flex:1;max-width:670px}.search-form input{height:48px;flex:1;border:1px solid #9ea5ad;padding:0 16px;font-size:16px}.search-form button{height:48px;border:0;background:var(--primary);color:#fff;padding:0 24px;font-weight:700}.results-toolbar span{font-weight:700}.catalog-item{display:grid;grid-template-columns:185px 1fr;gap:34px;padding:38px 0;border-bottom:1px solid #aeb4bc}.product-image,.detail-image,.recommend-image{display:flex;align-items:center;justify-content:center;border:1px solid #cfd3d8;background:#fff;overflow:hidden}.product-image{height:185px}.product-image img{width:72%;height:72%;object-fit:contain}.catalog-copy .eyebrow,.eyebrow{color:var(--primary);font-weight:700;margin:0 0 6px}.catalog-copy h2{font-size:31px;margin:0 0 10px}.catalog-copy h2 a{color:var(--ink)}.catalog-copy p{color:#59616c}.catalog-meta{display:flex;gap:35px;margin:12px 0;color:#4d5661}.site-footer{border-top:1px solid var(--line);padding:35px 0;background:#f5f6f8}.site-footer .wrap{display:flex;justify-content:space-between;gap:30px}.site-footer p{margin:0;color:#59616c}.site-footer a{margin-left:22px}.detail-section{background:#f4f4f8;padding:48px 0 72px}.detail-grid{display:grid;grid-template-columns:215px 1fr;gap:55px}.detail-side{display:flex;flex-direction:column;gap:16px}.detail-image{height:215px}.detail-image img{width:76%;height:76%;object-fit:contain}.detail-side>a{font-weight:700;padding:9px 0;border-bottom:1px solid #d9dce2}.detail-main h1{font-size:45px;line-height:1.1;margin:10px 0 24px}.lead{font-size:20px;max-width:1040px}.detail-facts{display:flex;gap:42px;margin:26px 0}.detail-facts div{min-width:160px}.detail-facts dt{font-weight:700}.detail-facts dd{margin:5px 0 0;color:#56606b}.table-wrap{overflow:auto}.variants{width:100%;border-collapse:collapse;margin-top:20px;background:#fff}.variants th,.variants td{text-align:left;padding:16px;border-bottom:1px solid var(--line);white-space:nowrap}.variants th{font-size:14px}.status-dot{display:inline-flex;border:2px solid #20a86b;border-radius:50%;color:#20a86b;width:23px;height:23px;align-items:center;justify-content:center;margin-right:8px}.detail-actions{display:flex;justify-content:flex-end;gap:16px;margin-top:28px}.recommended{background:#fff;border-top:1px solid #ced2d8;border-bottom:1px solid #ced2d8;padding:46px 0;margin:70px calc(50% - 50vw) 0}.recommended>h2,.recommended>.recommend-grid{width:min(1420px,calc(100% - 72px));margin-left:auto;margin-right:auto}.recommended h2{text-transform:uppercase;font-size:30px;letter-spacing:.03em}.recommend-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:38px}.recommend-card{display:grid;grid-template-columns:125px 1fr;column-gap:20px;color:var(--ink)}.recommend-card:hover{text-decoration:none}.recommend-image{grid-row:1/4;height:125px}.recommend-image img{width:72%;height:72%;object-fit:contain}.recommend-card span{color:var(--primary)}.recommend-card strong{font-size:19px}.properties{padding-top:48px}.properties h2{text-transform:uppercase;font-size:30px}.properties dl{max-width:980px}.properties dl div{display:grid;grid-template-columns:270px 1fr;padding:15px 0;border-bottom:1px solid #cfd3d8}.properties dt{font-weight:700}.properties dd{margin:0}.alt-intro{padding:36px 0 70px}.alt-intro p{font-size:20px;color:#315a78;max-width:980px}.four-links{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:#d5d9df;border-top:1px solid #d5d9df}.four-links a{background:#fff;padding:26px;text-align:center;font-weight:700}.mobile-nav{display:none}

/* ================= 交互与反馈 ================= */

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 30px;
  transform: translateX(-50%) translateY(16px);
  background: rgba(17, 27, 34, 0.94);
  color: #fff;
  padding: 12px 20px;
  border-radius: 6px;
  font-size: 14px;
  line-height: 1.4;
  max-width: min(90vw, 420px);
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease, transform 0.22s ease;
  z-index: 1600;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* CAS / SKU 复制按钮 */
.copy-chip {
  display: inline;
  border: 0;
  border-bottom: 1px dashed currentColor;
  background: none;
  color: inherit;
  font: inherit;
  padding: 0;
  cursor: copy;
}
.copy-chip:hover,
.copy-chip:focus-visible {
  color: var(--accent);
  outline: none;
}

/* 文字链接按钮 */
.link-button {
  border: 0;
  background: none;
  color: var(--accent);
  font: inherit;
  padding: 0;
  cursor: pointer;
}
.link-button:hover {
  text-decoration: underline;
}

/* button 元素继承字体 */
button.button,
.button {
  font-family: inherit;
  cursor: pointer;
}

/* 分类筛选 */
.filter-check {
  display: flex !important;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}
.filter-check input {
  margin: 0;
  accent-color: var(--primary);
}
.filter-check span {
  flex: 1;
}
.filter-check em {
  font-style: normal;
  font-size: 12px;
  color: var(--muted);
  background: var(--surface);
  border-radius: 10px;
  padding: 1px 8px;
}
.filter-clear {
  margin-top: 12px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--primary);
  font-weight: 700;
  font-size: 13px;
  padding: 7px 14px;
  cursor: pointer;
}
.filter-clear:hover {
  background: var(--surface);
}

/* 空结果 */
.catalog-empty {
  padding: 56px 24px;
  text-align: center;
  color: var(--muted);
  border-bottom: 1px solid #aeb4bc;
}
.catalog-empty strong {
  display: block;
  color: var(--ink);
  font-size: 22px;
  margin-bottom: 8px;
}
.catalog-empty .catalog-empty-reset {
  margin-top: 18px;
  min-height: 42px;
  padding: 0 20px;
  border: 2px solid var(--primary);
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  cursor: pointer;
}
.catalog-empty .catalog-empty-reset:hover {
  background: var(--primary-dark);
}

/* CAS 未收录询问 */
.cas-ask {
  margin: 18px 0 0;
  color: var(--ink);
  font-size: 15px;
}
.cas-ask .link-button {
  font-weight: 700;
  border-bottom: 1px dashed currentColor;
}

/* 计数动画 */
@keyframes bump {
  0% { transform: scale(1); }
  40% { transform: scale(1.18); }
  100% { transform: scale(1); }
}
#result-count.bump {
  display: inline-block;
  animation: bump 0.32s ease;
}

/* 详情图 hover 轻微放大 */
.detail-image img {
  transition: transform 0.35s ease;
}
.detail-image:hover img {
  transform: scale(1.045);
}

/* 回到顶部 */
#back-to-top {
  position: fixed;
  right: 24px;
  bottom: 88px;
  width: 46px;
  height: 46px;
  border: 0;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 20px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
  z-index: 900;
  box-shadow: 0 6px 18px rgba(17, 69, 143, 0.3);
}
#back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
#back-to-top:hover {
  background: var(--primary-dark);
}

/* 浮动 WhatsApp */
#float-whatsapp {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: #25d366;
  color: #fff !important;
  font-size: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  z-index: 900;
  box-shadow: 0 8px 22px rgba(37, 211, 102, 0.38);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
#float-whatsapp:hover {
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 10px 26px rgba(37, 211, 102, 0.48);
}

/* 语言按钮激活态增强 */
.lang-switch button.active {
  font-weight: 700;
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ================= 询盘弹窗 ================= */

body.modal-open {
  overflow: hidden;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 1500;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.modal[hidden] {
  display: none !important;
}
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(8, 20, 38, 0.58);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}
.modal-card {
  position: relative;
  background: #fff;
  width: min(520px, 100%);
  max-height: 90vh;
  overflow: auto;
  padding: 34px 32px 30px;
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.32);
  animation: modal-in 0.2s ease;
}
@keyframes modal-in {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}
.modal-close {
  position: absolute;
  top: 10px;
  right: 12px;
  border: 0;
  background: none;
  font-size: 28px;
  line-height: 1;
  color: #8a919b;
  cursor: pointer;
  padding: 4px 8px;
}
.modal-close:hover {
  color: var(--ink);
}
.modal-card h2 {
  font-size: 28px;
  margin: 0 0 6px;
}
.modal-sub {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 22px;
}

/* 表单 */
.field {
  display: block;
  margin-bottom: 16px;
}
.field > span {
  display: block;
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 6px;
  color: #2f3741;
}
.field em {
  color: #c8322b;
  font-style: normal;
}
.field input {
  width: 100%;
  height: 46px;
  border: 1px solid #9ea5ad;
  padding: 0 14px;
  font-size: 15px;
  font-family: inherit;
  background: #fff;
  color: var(--ink);
}
.field input:focus {
  outline: 2px solid rgba(17, 69, 143, 0.25);
  border-color: var(--primary);
}
.field-readonly p {
  margin: 0;
  padding: 12px 14px;
  background: var(--surface);
  border: 1px dashed #c3c9d2;
  font-size: 14px;
  color: #2f3741;
  line-height: 1.45;
}
.form-error {
  color: #b42318;
  font-size: 14px;
  margin: 0 0 14px;
}
.quote-submit {
  width: 100%;
}

/* 成功视图 */
.quote-success-icon {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: #e6f6ee;
  color: #20a86b;
  font-size: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 0 16px;
}
.quote-success-text {
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 10px;
  line-height: 1.55;
}
.quote-success-sub {
  font-size: 14px;
  color: var(--muted);
  margin: 0 0 22px;
  line-height: 1.55;
}
.quote-success-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}
.quote-success-actions .button {
  width: 100%;
}
.quote-success-actions .button-outline {
  background: #fff;
}
.quote-done {
  display: block;
  margin: 0 auto;
  color: var(--muted);
}

/* ================= 定制产品蓝色卡片 ================= */

.custom-promo {
  position: relative;
  border: 2px solid var(--primary);
  background: linear-gradient(135deg, #eaf2fc 0%, #ffffff 70%);
  padding: 22px 26px 24px;
  margin-bottom: 28px;
  box-shadow: 0 8px 22px rgba(17, 69, 143, 0.1);
}
.custom-promo::after {
  content: "";
  position: absolute;
  inset: 0 0 auto auto;
  width: 6px;
  height: 100%;
  background: var(--primary);
  opacity: 0.9;
}
.custom-promo-badge {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  margin-bottom: 10px;
}
.custom-promo-title {
  font-size: 26px;
  margin: 0 0 6px;
  color: var(--primary-dark);
}
.custom-promo-cn {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: #b42318;
  line-height: 1.5;
}
.custom-promo-en {
  margin: 0 0 16px;
  font-size: 14px;
  color: #4d5661;
  line-height: 1.55;
  max-width: 720px;
}
.custom-promo .button {
  min-height: 44px;
}

/* ================= Technical documents 右侧提示卡 ================= */

.doc-hint {
  position: fixed;
  right: 24px;
  top: 42%;
  transform: translateY(-50%);
  width: min(340px, calc(100vw - 32px));
  background: #fff;
  border-top: 4px solid var(--primary);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.22);
  padding: 22px 22px 20px;
  z-index: 1400;
  animation: doc-hint-in 0.22s ease;
}
@keyframes doc-hint-in {
  from { opacity: 0; transform: translateY(-50%) translateX(18px); }
  to { opacity: 1; transform: translateY(-50%) translateX(0); }
}
.doc-hint[hidden] {
  display: none !important;
}
.doc-hint h3 {
  margin: 0 0 8px;
  font-size: 20px;
  color: var(--primary-dark);
}
.doc-hint p {
  margin: 0 0 16px;
  font-size: 14px;
  color: #4d5661;
  line-height: 1.55;
}
.doc-hint-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.doc-hint-actions .button {
  width: 100%;
  min-height: 42px;
  font-size: 14px;
}
.doc-hint-close {
  position: absolute;
  top: 6px;
  right: 8px;
  border: 0;
  background: none;
  font-size: 24px;
  line-height: 1;
  color: #8a919b;
  cursor: pointer;
  padding: 4px 8px;
}
.doc-hint-close:hover {
  color: var(--ink);
}

/* ================= 响应式 ================= */
@media (max-width: 900px) {
  .wrap{width:min(100% - 36px,760px)}
  .utility{display:none}
  .masthead{height:76px}
  .logo{width:235px}
  .main-nav{display:none}
  .bluebar{height:auto}
  .bluebar .wrap{gap:18px;padding:16px 0;flex-wrap:wrap}
  .bluebar .contact-nav{width:100%;margin:0}
  .hero,.hero-people{min-height:440px}
  .hero .wrap{padding-top:80px}
  .hero h1{font-size:44px}
  .intro-grid,.catalog-shell,.detail-grid{grid-template-columns:1fr}
  .filters{border-right:0;border-bottom:1px solid var(--line);padding:0 0 20px}
  .filters .filter-block:nth-of-type(n+3){display:none}
  .catalog-item{grid-template-columns:125px 1fr}
  .product-image{height:125px}
  .detail-side{display:grid;grid-template-columns:180px 1fr}
  .detail-image{grid-row:1/4;height:180px}
  .recommend-grid{grid-template-columns:1fr}
  .site-footer .wrap{display:block}
  .site-footer nav{margin-top:18px}
  .site-footer a{margin:0 16px 0 0}
  .four-links{grid-template-columns:1fr 1fr}
  .doc-hint{top: auto; bottom: 96px; transform: none;}
  @keyframes doc-hint-in {
    from { opacity: 0; transform: translateY(14px); }
    to { opacity: 1; transform: translateY(0); }
  }
}

@media (max-width: 560px) {
  .wrap{width:calc(100% - 28px)}
  .logo{width:210px}
  .bluebar a{font-size:14px}
  .contact-nav{display:none!important}
  .hero h1{font-size:37px}
  .hero p{font-size:18px}
  .intro{padding-top:38px}
  .intro h2{font-size:38px}
  .intro p{font-size:18px}
  .page-title h1{font-size:36px}
  .catalog-item{grid-template-columns:1fr}
  .product-image{width:150px}
  .results-toolbar{align-items:stretch;flex-direction:column}
  .detail-side{grid-template-columns:130px 1fr}
  .detail-image{height:130px}
  .detail-main h1{font-size:36px}
  .detail-facts{display:grid;grid-template-columns:1fr 1fr;gap:20px}
  .recommend-card{grid-template-columns:95px 1fr}
  .recommend-image{height:95px}
  .properties dl div{grid-template-columns:130px 1fr}
  .four-links{grid-template-columns:1fr}
  #back-to-top{right:16px;bottom:84px;width:42px;height:42px}
  #float-whatsapp{right:16px;bottom:20px;width:48px;height:48px;font-size:24px}
  .toast{bottom:84px;font-size:13px;padding:10px 16px}
  .modal{padding:14px}
  .modal-card{padding:26px 20px 22px}
  .modal-card h2{font-size:24px}
  .quote-success-text{font-size:17px}
  .custom-promo{padding:18px 18px 20px}
  .custom-promo-title{font-size:22px}
  .custom-promo-cn{font-size:15px}
  .doc-hint{right:14px;left:14px;width:auto;bottom:88px}
}