/* ============================================================
   main.css — 阿姆斯壮雅顿产品详情页
   依据原站设计规范复刻：futura-pt 字体 / 品牌蓝 #004a9f /
   灰底 #ededed / 深蓝页脚 #0b1b24
   ============================================================ */

:root {
  --color-brand: #004a9f;
  --color-text: #484848;
  --color-headline: #484848;
  --color-muted: #484848;
  --color-grey-bg: #ededed;
  --color-footer: #0b1b24;
  --color-dark-card: #323232;
}

/* ---------- 基础 ---------- */
html {
  font-size: 16px;
}

body {
  margin: 0;
  color: var(--color-text);
  background: #fff;
  font-family: "Poppins", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  /* 与原站一致：随视口放大，1600px 视口处封顶 18px */
  font-size: min(calc(1.0125rem + .1125vw), 1.125rem);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-brand);
  text-decoration: none;
}

a:hover {
  color: var(--color-brand);
  text-decoration: none;
}

img {
  max-width: 100%;
}

ul {
  margin: 0;
  padding: 0;
}

.list-grid {
  
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.btn-reset {
  background: none;
  border: none;
  padding: 0;
}

.pos-rel {
  position: relative;
}

.pos-abs {
  position: absolute;
}

.w-100 {
  width: 100%;
}

.flex-shrink-0 {
  flex-shrink: 0;
}

.fw--medium {
  font-weight: 500;
}

.fw--bold {
  font-weight: 700;
}

.font-light {
  font-weight: 300;
}

.lc-mb-0 {
  margin-bottom: 0;
}

.mt-3 {
  margin-top: 1rem;
}

.pt-3 {
  padding-top: 1rem;
}

.pb-3 {
  padding-bottom: 1rem;
}

.pb-4 {
  padding-bottom: 1.5rem;
}

.mb-4 {
  margin-bottom: 1.5rem;
}

.fs--text-small {
  font-size: 1rem;
}

/* 内容列缩进：10/12 宽度 + 1/12 左边距（与原站一致） */
.container--indent {
  flex: 0 0 83.3333%;
  max-width: 83.3333%;
  margin-left: 8.3333%;
}

/* ---------- 排版（与原站一致：流式字号在 1600px 视口封顶） ---------- */
h1,
h2,
h3,
h4,
h5,
h6 {
  margin-bottom: .5rem;
  font-weight: 500;
  line-height: 1.2;
}

.h1,
h1 {
  line-height: 1.1;
  color: var(--color-headline);
  font-weight: 700;
  margin-top: 1rem;
  margin-bottom: .5rem;
  font-size: min(calc(1.225rem + 2.025vw), 3.25rem);
}

.h2,
h2 {
  line-height: 1.1;
  color: var(--color-headline);
  font-weight: 700;
  margin-top: 1rem;
  margin-bottom: .5rem;
  font-size: min(calc(1.125rem + 1.125vw), 2.25rem);
}

.h3,
h3 {
  line-height: 1.25;
  color: var(--color-headline);
  font-weight: 700;
  margin-top: 1rem;
  margin-bottom: .5rem;
  font-size: min(calc(1.05rem + .45vw), 1.5rem);
}

.h4,
h4 {
  line-height: 1.1;
  color: var(--color-headline);
  font-weight: 700;
  margin-top: .5rem;
  margin-bottom: .5rem;
  font-size: min(calc(1.025rem + .225vw), 1.25rem);
}

.h5,
h5 {
  line-height: 1.1;
  color: var(--color-headline);
  font-weight: 700;
  margin-top: .5rem;
  margin-bottom: .5rem;
  font-size: min(calc(1.0125rem + .1125vw), 1.125rem);
}

/* hero 大标题：992–1600px 区间按原站 span 规则缩放 */
@media (min-width: 992px) and (max-width: 1599.98px) {
  .headline.header-element__headline span {
    font-size: min(calc(1.5rem + (100vw - 992px) * .03), 2.5rem);
  }
}

@media (min-width: 300px) and (max-width: 468px) {
  .headline.header-element__headline span {
    font-size: calc(1.59rem - (468px - 100vw) * .05);
  }
}

.fst--subheader {
  font-size: .875rem;
  font-weight: 700;
  letter-spacing: .17em;
  text-transform: uppercase;
}

.fst--startpage-subheader {
  font-size: .875rem;
  font-weight: 400;
  letter-spacing: .14875em;
  text-transform: uppercase;
}

.bodytext {
  font-weight: 400;
  font-size: min(calc(1.0125rem + .1125vw), 1.125rem);
  line-height: 1.67rem;
}

.bodytext p {
  margin-bottom: 1em;
}

.bodytext strong {
  font-weight: 700;
}

.bodytext ul {
  padding-left: 0;
  margin: 0 0 1em;
}

.bodytext ul li {
  position: relative;
  padding-left: 1.5em;
  margin-bottom: 1em;
  line-height: 1.5;
  list-style: none;
}

.bodytext ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .4em;
  width: .5em;
  height: .5em;
  background-color: var(--color-brand);
}

@media (min-width: 968px) and (max-width: 1399.98px) {
  .list-normal {
    font-size: 14px;
  }
}

/* 移动端：修正 banner 因 .row 负边距导致的左右留白不等 */
@media (max-width: 767.98px) {
  .header-element__row {
    margin-left: 0;
    margin-right: 0;
  }

  .header-element__row>[class*="col-"] {
    padding-left: 0;
    padding-right: 0;
  }
}

/* ---------- SVG 图标 ---------- */
.svg-icon {
  line-height: 0;
  display: inline-block;
  height: 1em;
  width: 1em;
}

.svg-icon svg {
  display: inline-block;
  height: 1em;
  width: 1em;
  vertical-align: middle;
  fill: currentColor;
  stroke: currentColor;
  stroke-width: 0;
}

.object-fit--cover {
  object-fit: cover;
}

/* ---------- 按钮 ---------- */
.btn {
  font-size: .8125rem;
  letter-spacing: .17em;
  text-transform: uppercase;
  font-weight: 700;
  position: relative;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  color: #fff;
  background: var(--color-brand);
  transition: all .15s ease-out;
  padding: 1.2em 1.6em;
  border-radius: 0;
  border: 1px solid var(--color-brand);
  cursor: pointer;
}

.btn:active,
.btn:focus,
.btn:hover {
  color: #fff;
  background: var(--color-brand);
  box-shadow: 0 0 0 4px rgba(0, 74, 159, .3);
  text-decoration: none;
}

.btn__icon {
  margin-right: 1rem;
  display: flex;
}

/* ---------- 区块间距（与原站一致：随断点放大 480:×1.2 / 768:×1.5 / 992:×1.8 / 1680:×2.5 / 1920:×3） ---------- */
.content-element--st-none {
  padding-top: 0;
}

.content-element--sb-none {
  padding-bottom: 0;
}

.content-element--st-small {
  padding-top: 1.5rem;
}

.content-element--sb-small {
  padding-bottom: 1.5rem;
}

.content-element--st-default {
  padding-top: 3rem;
}

.content-element--sb-default {
  padding-bottom: 3rem;
}

.content-element--st-large {
  padding-top: 6rem;
}

.content-element--sb-large {
  padding-bottom: 6rem;
}

@media (min-width: 480px) {
  .content-element--st-small {
    padding-top: 1.8rem;
  }

  .content-element--sb-small {
    padding-bottom: 1.8rem;
  }

  .content-element--st-default {
    padding-top: 3.6rem;
  }

  .content-element--sb-default {
    padding-bottom: 3.6rem;
  }

  .content-element--st-large {
    padding-top: 7.2rem;
  }

  .content-element--sb-large {
    padding-bottom: 7.2rem;
  }
}

@media (min-width: 768px) {
  .content-element--st-small {
    padding-top: 2.25rem;
  }

  .content-element--sb-small {
    padding-bottom: 2.25rem;
  }

  .content-element--st-default {
    padding-top: 4.5rem;
  }

  .content-element--sb-default {
    padding-bottom: 4.5rem;
  }

  .content-element--st-large {
    padding-top: 9rem;
  }

  .content-element--sb-large {
    padding-bottom: 9rem;
  }
}

@media (min-width: 992px) {
  .content-element--st-small {
    padding-top: 2.7rem;
  }

  .content-element--sb-small {
    padding-bottom: 2.7rem;
  }

  .content-element--st-default {
    padding-top: 5.4rem;
  }

  .content-element--sb-default {
    padding-bottom: 5.4rem;
  }

  .content-element--st-large {
    padding-top: 10.8rem;
  }

  .content-element--sb-large {
    padding-bottom: 10.8rem;
  }
}

@media (min-width: 1680px) {
  .content-element--st-small {
    padding-top: 3.75rem;
  }

  .content-element--sb-small {
    padding-bottom: 3.75rem;
  }

  .content-element--st-default {
    padding-top: 7.5rem;
  }

  .content-element--sb-default {
    padding-bottom: 7.5rem;
  }

  .content-element--st-large {
    padding-top: 15rem;
  }

  .content-element--sb-large {
    padding-bottom: 15rem;
  }
}

@media (min-width: 1920px) {
  .content-element--st-small {
    padding-top: 4.5rem;
  }

  .content-element--sb-small {
    padding-bottom: 4.5rem;
  }

  .content-element--st-default {
    padding-top: 9rem;
  }

  .content-element--sb-default {
    padding-bottom: 9rem;
  }

  .content-element--st-large {
    padding-top: 18rem;
  }

  .content-element--sb-large {
    padding-bottom: 18rem;
  }
}

/* ---------- 滚动动画（scrollmonitor） ---------- */
.scrollmonitor {
  transition: .5s ease-out;
}

.animate-fade-bottom {
  transform: translateY(20%);
  transition-delay: .3s;
}

.animate-fade-bottom.scmo--visited-vp.scmo--init {
  transform: translateY(0);
}

/* ============================================================
   顶部导航
   ============================================================ */
.header {
  background: #fff;
}

.armstrong-headerbar__nav_top {
  height: 4rem;
  box-shadow: 0 0 15px rgba(0, 0, 0, .1);
  background-color: #fff;
  position: relative;
  z-index: 100;
}

.armstrong-headerbar__container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.armstrong-headerbar__container::before,
.armstrong-headerbar__container::after {
  content: none;
}

.armstrong-headerbar__logo-wrapper {
  position: relative;
  align-items: center;
  display: flex;
  width: 100%;
  padding-left: 15px;
}

.armstrong-headerbar__logo-link {
  position: relative;
  overflow: hidden;
  display: block;
}

.armstrong-headerbar__logo-container {
  background: #fff;
}

.armstrong-headerbar__logo-container--default {
  position: relative;
  z-index: 1;
}

.armstrong-headerbar__logo-container:not(.armstrong-headerbar__logo-container--default) {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  opacity: 0;
}

.armstrong-headerbar__logo {
  display: block;
  height: 2rem;
  width: auto;
}

.armstrong-headerbar__logo:not(.armstrong-headerbar__logo--default) {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

.armstrong-headerbar__center {
  flex-grow: 1;
}

/* 主导航 */
.main-navigation {
  display: none;
}

.main-navigation__list--level-1,
.main-navigation__list-item--level-1,
.main-navigation__wrapper {
  display: flex;
}

.main-navigation__list {
  list-style: none;
  margin: 0;
}

.main-navigation__list-item--level-1 {
  margin: 0 .5em;
}

.main-navigation__list-item-wrap--level-1 {
  display: flex;
  align-items: center;
}

.main-navigation__list-item-link--level-1 {
  position: relative;
  display: flex;
  transition: color .15s ease-out;
  color: var(--color-text);
}

.main-navigation__list-item-link--level-1::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--color-brand);
  transition: transform .2s ease-out;
  transform: scaleX(0);
}

.main-navigation__list-item-link--level-1:hover::after,
.main-navigation__list-item-link--level-1.main-navigation__list-item-link--active::after {
  transform: scaleX(1);
}

.main-navigation__list-item-link--level-1.main-navigation__list-item-link--active {
  color: var(--color-brand);
}

/* 语言切换 */
.language-switcher {
  font-size: 1rem;
  font-weight: 500;
  position: relative;
  align-self: center;
  z-index: 1;
  padding: 0 1em;
}

.language-switcher__active {
  display: flex;
  align-items: center;
  color: var(--color-text);
  cursor: pointer;
}

.language-switcher__active-text {
  display: flex;
  align-items: center;
}

.language-switcher__active-icon {
  margin-left: .5em;
  font-size: .8em;
  color: var(--color-brand);
}

.language-switcher__active svg {
  transition: transform .2s ease-out;
}

.language-switcher__active:not(.collapsed) svg {
  transform: scale(-1);
}

.language-switcher__translations {
  position: absolute;
  background: #e9f1f5;
  display: none;
}

.language-switcher__translations.show {
  display: block;
}

.language-switcher__translations-list {
  list-style: none;
  padding: .5em 1em;
  margin: 0;
}

.language-switcher__translations-list a {
  color: var(--color-text);
  display: block;
  padding: .25em 0;
}

/* 联系我们按钮 */
.armstrong-headerbar__right {
  display: flex;
  align-items: center;
}

.armstrong-headerbar__contact_wrapper {
  display: inline-block;
  flex-direction: row;
  border-left: 1px solid var(--color-grey-bg);
  border-right: 1px solid var(--color-grey-bg);
}

.armstrong-headerbar__contact_link {
  position: relative;
  display: flex;
  background-color: #fff;
  height: 4rem;
}

.armstrong-headerbar__contact_text {
  padding: 0 1.5em;
  overflow: hidden;
  white-space: nowrap;
  position: relative;
  align-items: center;
  display: flex;
  z-index: 1;
  color: var(--color-text);
}

.armstrong-headerbar__contact_text--toggle {
  display: none;
}

.armstrong-headerbar__contact_backdrop {
  background: var(--color-brand);
  position: absolute;
  z-index: 0;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform .3s ease-out;
}

.armstrong-headerbar__contact_envelope {
  background-color: var(--color-brand);
  color: #fff;
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  height: 4rem;
  width: 4rem;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.armstrong-headerbar__contact_envelope_icon {
  margin: 0 auto;
  transition: .3s;
  width: 20px;
}

.armstrong-headerbar__contact_link:hover .armstrong-headerbar__contact_envelope_icon {
  animation: headerEnvelopeHover .6s;
}

@keyframes headerEnvelopeHover {
  0% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(120%);
  }

  51% {
    transform: translateY(-120%);
  }

  100% {
    transform: translateY(0);
  }
}

/* 汉堡菜单 */
.header__toggle-nav {
  background: none;
  border: none;
  padding: 0 1rem;
  cursor: pointer;
  display: block;
}

.header__toggle-nav:focus {
  outline: none;
}

.header__toggle-nav span {
  display: block;
  width: 1.5rem;
  height: 2px;
  background: var(--color-brand);
  transition: transform .2s ease-out;
}

.header__toggle-nav span:not(:last-child) {
  margin-bottom: 6px;
}

.menu--active .header__toggle-nav span:first-child {
  transform: rotate(45deg) translate(3px, 4px);
}

.menu--active .header__toggle-nav span:last-child {
  transform: rotate(-45deg) translate(1px, -3px);
}

/* 回到顶部（固定定位，不占文档流，与原站一致：滚动超过一屏后出现） */
.armstrong-headerbar__top_button_container {
  position: fixed;
  top: 90vh;
  right: 3vw;
  transform: rotate(270deg);
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s ease-out, visibility .3s ease-out;
  z-index: 90;
}

.armstrong-headerbar__top_button_container.scroll-top--visible {
  opacity: 1;
  visibility: visible;
}

.armstrong-headerbar__top_button {
  color: #fff;
  background-color: var(--color-brand);
  height: 3em;
  width: 3em;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
}

.armstrong-headerbar__top_button svg {
  transform: rotate(90deg);
}

/* ============================================================
   产品 Banner（header-element）
   ============================================================ */
.header-element {
  display: flex;
  position: relative;
}

.header-element__wrapper {
  position: relative;
}

.header-element__container {
  display: flex;
  flex-wrap: wrap;
}

.header-element__image_row {
  text-align: center;
  flex-grow: 1;
  overflow: hidden;
}

.header-element__image-container {
  position: relative;
}

.header-element__image {
  width: 100%;
}

.object-fit--cover.header-element__image {
  object-position: 0%;
}

.header-element__row {
  width: 100%;
}

.header-element__text-wrapper {
  margin-top: 2rem;
}

.header-element__back {
  display: flex;
  align-items: center;
  margin-bottom: 2em;
}

.header-element__back-icon {
  font-size: .8em;
  color: var(--color-brand);
  margin-right: .5em;
  transition: transform .2s ease-out;
}

.header-element__back:hover .header-element__back-icon {
  transform: translateX(10%);
}

.header-element__back-link {
  color: var(--color-text);
}

.header-element__subheader {
  color: var(--color-muted);
  letter-spacing: .1em;
}

.header-element__headline {
  color: var(--color-text);
}

.header-element__separator {
  display: block;
  height: 2px;
  width: 3.5rem;
  margin: .5em 0;
  background-color: var(--color-brand);
}

.header-element__description {
  color: var(--color-text);
  margin-top: 2rem;
}

.header-element__link-container {
  margin-top: 1.5em;
  display: grid;
  gap: 1em;
  flex-grow: 1;
}

.header-element__btn {
  text-align: center;
  justify-content: center;
}

/* 可用区域 */
.available-regions {
  align-items: flex-start;
}

.available-regions__icon {
  color: var(--color-brand);
  margin-right: .5em;
  font-size: 1.5em;
}

.available-regions__title {
  color: var(--color-text);
}

.available-regions__list {
  list-style: none;
  margin: .5em 0 0;
}

.available-regions__list-item {
  display: inline;
  white-space: nowrap;
}

.available-regions__list-item:not(:last-child)::after {
  content: ", ";
  margin-left: -4px;
}

.available-regions__list-item__text {
  color: inherit;
  text-decoration: underline;
}

.available-regions__list-item__text--active {
  font-weight: 700;
}

.available-regions__list-item__text--button {
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
  font-size: inherit;
  font-family: inherit;
}

.available-region__show-more {
  padding: 0;
  border: none;
  text-decoration: underline;
  background: none;
  color: var(--color-brand);
  cursor: pointer;
  font-size: 1rem;
  font-family: inherit;
}

.available-regions__collapse {
  display: none;
}

.available-regions__collapse.show {
  display: block;
}

.available-regions__button.link {
  border: none;
  background: none;
  color: var(--color-brand);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  font-size: inherit;
  font-family: inherit;
  padding: 0;
}

.link__label {
  border-bottom: 1px solid var(--color-brand);
}

.link__icon {
  margin-left: .5em;
  font-size: .8em;
}

/* 区域国家弹层 */
.region-country-overlay {
  position: fixed;
  top: 50%;
  left: 50%;
  z-index: 9;
  padding: 2em;
  box-shadow: 0 0 10px rgba(0, 0, 0, .3);
  width: 25em;
  max-width: 90%;
  background: #fff;
  transform: translate(-50%, -50%);
}

.region-country-overlay[hidden] {
  display: none;
}

.region-country-overlay__close-button {
  color: var(--color-brand);
  position: absolute;
  top: 1em;
  right: 1em;
  padding: 0;
  background: none;
  border: none;
  display: flex;
  cursor: pointer;
}

.region-country-overlay__title {
  margin-top: 0;
  margin-bottom: .5em;
}

.region-country-overlay__country-list {
  padding-left: 0;
  max-height: 12em;
  padding-right: .5em;
  margin: 1em 0;
  overflow: auto;
  list-style: none;
}

.region-country-overlay__country-list li {
  padding-left: 1em;
  line-height: 1.3;
  margin-bottom: .5em;
  position: relative;
}

.region-country-overlay__country-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .4em;
  width: .5em;
  height: .5em;
  background: var(--color-brand);
}

/* ============================================================
   材质与尺寸（armstrong-materials）
   ============================================================ */
.armstrong-materials__wrapper {
  position: relative;
  overflow: hidden;
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
}

.armstrong-materials__background-box {
  background: var(--color-grey-bg);
  position: absolute;
  top: 0;
  bottom: 0;
  right: 0;
  left: 0;
  z-index: 0;
}

.armstrong-materials__container {
  position: relative;
  margin-bottom: 2em;
  z-index: 1;
}

.armstrong-materials__header-wrapper {
  margin-bottom: 3em;
}

.armstrong-materials__header {
  color: var(--color-headline);
  font-weight: 700;
}

.armstrong-materials__header-separator {
  background-color: var(--color-brand);
  height: 2px;
  width: 3.5rem;
  margin-top: .3rem;
}

.armstrong-materials__items {
  overflow: visible;
}

.armstrong-materials__item {
  background-color: var(--color-dark-card);
  height: auto;
  box-shadow: 0 5px 15px rgba(0, 0, 0, .1);
  width: 256px;
}

.armstrong-materials__image-wrapper {
  background-color: #fff;
  display: block;
  border: .5em solid #fff;
}

.armstrong-materials__image {
  width: 100%;
  display: block;
}

.armstrong-materials__image_text {
  color: #fff;
  padding: 1em;
  line-height: 1.2rem;
}

/* 轮播滚动条 */
.armstrong-materials__swiper-scrollbar>.swiper-scrollbar-drag {
  background-color: var(--color-brand);
}

.swiper-container-horizontal>.swiper-scrollbar {
  position: static;
  width: 450px;
  max-width: 50%;
  margin: 2em auto 0;
}

/* 轮播箭头 */
.swiper-navigation {
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1;
  pointer-events: none;
  transition: opacity .2s ease-out;
}

.swiper-container .swiper-navigation {
  opacity: 0;
}

.swiper-container:hover .swiper-navigation {
  opacity: 1;
}

.swiper-navigation__button {
  width: 3em;
  height: 3em;
  background: var(--color-brand);
  color: #fff;
  transition: all .2s ease-out;
  pointer-events: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.swiper-navigation__button.swiper-button-disabled {
  opacity: 0;
  pointer-events: none;
}

.swiper-navigation__button:active,
.swiper-navigation__button:focus,
.swiper-navigation__button:hover {
  outline: none;
  box-shadow: 0 0 0 5px rgba(0, 74, 159, .2);
}

.swiper-navigation__icon-container {
  display: flex;
}

.swiper-navigation__icon {
  display: flex;
  justify-content: center;
  align-items: center;
}

.swiper-navigation__button--prev {
  transform: translateX(100%);
}

.swiper-navigation__button--prev svg {
  transform: rotate(-180deg);
}

.swiper-navigation__button--next {
  transform: translateX(-100%);
}

.armstrong-materials__swiper-navigation {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  display: none;
}

/* ============================================================
   技术规格标题（armstrong-headline）
   ============================================================ */
.armstrong-headline__container {
  margin-bottom: 2em;
}

.armstrong-headline__separator {
  height: 2px;
  width: 3.5rem;
  margin-top: .3rem;
  background-color: var(--color-brand);
}

/* ============================================================
   产品特色（text）
   ============================================================ */
.text__separator {
  height: 2px;
  width: 100%;
  background-color: var(--color-grey-bg);
  margin-bottom: 1em;
}

.text__headline {
  margin-top: 0;
}

/* ============================================================
   产品参数（product-features）
   ============================================================ */
.product-features__separator {
  height: 2px;
  width: 3.5rem;
  background-color: var(--color-brand);
  margin-top: .3rem;
}

.product-features__element {
  position: relative;
  text-align: center;
  margin: 0 0 2em;
  display: flex;
  align-items: center;
  flex-direction: row;
}

.product-features__icon-wrapper {
  font-size: 2.25em;
  position: relative;
  margin-bottom: .75rem;
  margin-right: 1rem;
}

.product-features__icon {
  font-size: 1em;
  color: var(--color-brand);
}

.product-features__icon-text-wrapper {
  display: flex;
  flex-direction: column;
  align-items: start;
  flex-grow: 1;
  text-align: left;
}

.product-features__icon-title {
  margin-top: 0;
  font-weight: 500;
}

.product-features__icon-description {
  color: var(--color-muted);
}

/* ============================================================
   产品单页下载（downloads）
   ============================================================ */
.downloads {
  position: relative;
  overflow: hidden;
  background: #fff;
  z-index: 1;
}

.downloads__wrapper {
  background: var(--color-grey-bg);
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
}

@media (min-width: 480px) {
  .downloads__wrapper {
    padding-top: 1.8rem;
    padding-bottom: 1.8rem;
  }
}

@media (min-width: 768px) {
  .downloads__wrapper {
    padding-top: 2.25rem;
    padding-bottom: 2.25rem;
  }
}

@media (min-width: 992px) {
  .downloads__wrapper {
    padding-top: 2.7rem;
    padding-bottom: 2.7rem;
  }
}

@media (min-width: 1680px) {
  .downloads__wrapper {
    padding-top: 3.75rem;
    padding-bottom: 3.75rem;
  }
}

@media (min-width: 1920px) {
  .downloads__wrapper {
    padding-top: 4.5rem;
    padding-bottom: 4.5rem;
  }
}

.downloads__separator {
  height: 2px;
  width: 3.5rem;
  background-color: var(--color-brand);
  margin-top: .3rem;
}

.downloads__list {
  margin-top: 3em;
  margin-bottom: -1.5em;
}

.download-item {
  margin-bottom: 1.5rem;
}

.download-item__link {
  display: flex;
  align-items: center;
  background-color: #fff;
  box-shadow: 0 5px 15px rgba(0, 0, 0, .1);
  transition: .3s;
  color: var(--color-text);
  height: 100%;
}

.download-item__link:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 25px rgba(0, 0, 0, .1);
  text-decoration: none;
}

.download-item__icon-container {
  background: var(--color-brand);
  color: #fff;
  position: relative;
  height: 4.5em;
  width: 4.5em;
  padding: 1em;
  margin-right: 1.25em;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.download-item__icon {
  font-size: 1.5rem;
  display: flex;
}

.download-item__text {
  display: flex;
  flex-direction: column;
}

.download-item-title {
  color: #0b1b24;
  font-weight: 500;
}

.download-item__information {
  color: var(--color-muted);
  font-weight: 500;
}

/* ============================================================
   下载，联系人&新闻（teaser）
   ============================================================ */
.teaser {
  overflow: hidden;
}

.teaser__top {
  padding-top: 1rem;
  margin-bottom: 1.5rem;
}

.teaser__backdrop {
  background: var(--color-grey-bg);
  right: auto;
  width: 100%;
  z-index: -1;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
}

.teaser__backdrop::before {
  content: "";
  position: absolute;
  width: 100vw;
  left: -100vw;
  background: inherit;
  top: 0;
  bottom: 0;
}

.teaser__headline {
  margin-top: 0;
}

.teaser-item {
  background-color: #fff;
  box-shadow: rgba(0, 0, 0, .3) 0 3px 20px 0;
  margin: 0 0 2rem;
  width: 100%;
}

.teaser-item__media-container {
  position: relative;
  padding-block-end: 56.25%;
  overflow: hidden;
}

.teaser-item__image-container {
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}

.teaser-item__image {
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.teaser-item__content {
  padding: 1em;
}

.teaser-item__headline {
  color: inherit;
  margin: 0 0 .5em;
}

.teaser-item__link-container {
  margin-top: 1.5em;
}

.teaser-item__btn {
  align-self: flex-start;
}

/* ============================================================
   页脚（footer）
   ============================================================ */
.armstrong-footer__navbar {
  margin-bottom: 0;
  border-radius: 0;
  border: 0;
  background-color: var(--color-footer);
}

.armstrong-footer__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-direction: column-reverse;
  padding-bottom: 3rem;
}

.armstrong-footer__nav_wrapper {
  flex-grow: 2;
  display: flex;
  justify-content: center;
  align-items: self-start;
  padding-top: 6.25rem;
  width: 100%;
}

.armstrong-footer__logo {
  width: auto;
  height: 72px;
}

.footer-navigation__list {
  list-style: none;
  margin: 0;
}

.footer-navigation__list-item-headline {
  color: hsla(0, 0%, 100%, .7);
  margin-bottom: 1em;
}

.footer-navigation__list-item-link--level-1 {
  color: #fff;
}

.footer-navigation__link-title--level-1 {
  color: #fff;
}

.footer-navigation__list-item--level-1 {
  margin-bottom: .5em;
}

.footer-navigation__list-item-link--level-1:hover .footer-navigation__link-title--level-1 {
  color: #fff;
}

.legal-footer__container {
  margin: 0 auto;
  padding-top: 2.5rem;
  padding-bottom: 2.5rem;
}

.legal-footer__wrapper {
  margin-left: .938rem;
  margin-right: .938rem;
}

.legal-footer__copyright-wrapper {
  color: var(--color-muted);
}

.legal-footer__icp-number {
  color: var(--color-muted);
}

.legal-footer__icp-number .MainBox {
  display: flex;
  align-items: center;
  gap: .5em;
}

.legal-footer__icp-number .InnerBox a {
  color: var(--color-muted);
}

.legal-footer__icp-number .InnerBox span {
  color: var(--color-muted);
}

/* ============================================================
   隐私覆盖层（默认隐藏，结构与原站一致）
   ============================================================ */
.privacy-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
}

.privacy-overlay__backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .6);
  z-index: 199;
  display: none;
}

/* ============================================================
   响应式（与原站断点一致：480 / 768 / 992 / 1680 / 1920）
   ============================================================ */

@media (min-width: 480px) {
  .header-element__link-container {
    grid-template-columns: repeat(2, max-content);
    flex-grow: 0;
  }

  .armstrong-materials__wrapper {
    padding-top: 1.8rem;
    padding-bottom: 1.8rem;
  }
}

@media (min-width: 768px) {

  /* 与原站一致：宽容器 1600px + 40px 内边距 */
  .container {
    max-width: 1600px;
    padding-left: 40px;
    padding-right: 40px;
  }

  .header-element__image_row {
    margin-left: -5vw;
    margin-right: -5vw;
  }

  .teaser .teaser-item {
    margin-bottom: 3rem;
  }

  .armstrong-materials__wrapper {
    padding-top: 2.25rem;
    padding-bottom: 2.25rem;
  }

  .teaser__top {
    padding-top: 2rem;
  }

  /* 产品参数：图标居上、文字居中（与原站 ≥768px 一致） */
  .product-features__element {
    display: block;
    margin: 2em 0;
    text-align: center;
  }

  .product-features__icon-wrapper {
    margin-left: auto;
    margin-right: auto;
  }

  .product-features__icon-text-wrapper {
    display: block;
    text-align: center;
  }

  .product-features__icon-description {
    margin-top: .5em;
  }
}

@media (min-width: 992px) {

  /* 导航 */
  .main-navigation {
    display: flex;
  }

  .main-navigation__list-item__arrow {
    display: none;
  }

  .main-navigation__list-item--level-1 {
    position: relative;
  }

  .main-navigation__list--level-1 .main-navigation__list {
    position: absolute;
    display: block;
  }

  .main-navigation__list-item-link--level-1 {
    padding: .5em;
  }

  .main-navigation__link-title--level-1 {
    text-transform: uppercase;
    font-size: 14px;
    letter-spacing: 2.38px;
  }

  .main-navigation__list--level-2 {
    background: #fff;
    min-width: 12rem;
    top: calc(4rem - 15px);
    margin: 0;
    padding: 1.5rem 2.875rem 2.5rem;
    box-shadow: 0 0 25px rgba(0, 0, 0, .0706);
    position: absolute;
    left: 0;
    margin-bottom: 2em;
    z-index: -1;
    visibility: hidden;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity .2s ease-out, transform .2s ease-out, visibility .2s;
  }

  .main-navigation__list-item--level-1:hover .main-navigation__list--level-2,
  .main-navigation__list-item--level-1:focus-within .main-navigation__list--level-2 {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
  }

  .main-navigation__list-item--level-2 {
    margin: .5em 0;
  }

  .main-navigation__list-item--level-2:first-child {
    font-weight: 500;
  }

  .main-navigation__list-item-link--level-2 {
    color: var(--color-text);
  }

  .main-navigation__list-item-link--level-2:hover {
    color: var(--color-brand);
  }

  .armstrong-headerbar__logo-wrapper {
    padding: 0 10px 0 0;
    width: 125px;
    min-width: 125px;
  }

  .armstrong-headerbar__contact_wrapper {
    display: flex;
    border-right: none;
  }

  .armstrong-headerbar__contact_link:hover .armstrong-headerbar__contact_backdrop {
    transform: scaleX(1);
  }

  .armstrong-headerbar__contact_link:hover .armstrong-headerbar__contact_text {
    color: #fff;
  }

  .header__toggle-nav {
    display: none;
  }

  /* Banner：右侧斜切大图 */
  .header-element {
    position: relative;
  }

  .header-element--has-image .header-element__container {
    min-height: 550px;
  }

  .header-element__image_row {
    min-height: 570px;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: 0;
    z-index: 0;
  }

  .header-element__image-container {
    position: absolute;
    top: 0;
    bottom: 0;
    right: 0;
    left: 50vw;
    transform: skew(-8deg);
    transform-origin: 0 100%;
    overflow: hidden;
  }

  .header-element__image {
    transform: skew(8deg);
    transform-origin: 0 100%;
    height: 100%;
  }

  .header-element__row {
    position: relative;
    z-index: 1;
  }

  .header-element--back .header-element__text-wrapper {
    margin-top: 2rem;
  }

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

  /* 材质轮播箭头 */
  .armstrong-materials__swiper-navigation {
    display: flex;
  }

  .armstrong-materials__container {
    margin-bottom: 0;
  }

  .armstrong-materials__wrapper {
    padding-top: 2.7rem;
    padding-bottom: 2.7rem;
  }

  /* teaser 卡片 */
  .teaser-item__headline {
    margin: 0 0 1em;
  }

  .teaser-item__content {
    padding: 2em;
  }

  .teaser__top {
    padding-top: 3rem;
    margin-bottom: 3rem;
  }
}

@media (min-width: 1680px) {
  .armstrong-materials__wrapper {
    padding-top: 3.75rem;
    padding-bottom: 3.75rem;
  }
}

@media (min-width: 1920px) {
  .armstrong-materials__wrapper {
    padding-top: 4.5rem;
    padding-bottom: 4.5rem;
  }
}

/* ---------- 移动端菜单（<992px） ---------- */
@media (max-width: 991.98px) {
  .armstrong-headerbar__center {
    display: none;
    position: fixed;
    top: 4rem;
    left: 0;
    right: 0;
    bottom: 0;
    background: #fff;
    overflow-y: auto;
    z-index: 99;
  }

  .menu--active .armstrong-headerbar__center {
    display: block;
  }

  .main-navigation {
    display: block;
    padding: 0 1rem;
  }

  .main-navigation__list--level-1 {
    display: block;
  }

  .main-navigation__list-item--level-1 {
    margin: 0 1.5em;
    padding-bottom: 1.5rem;
    padding-top: 1.5rem;
    border-bottom: 2px solid hsla(0, 0%, 96.1%, .8);
  }

  .main-navigation__list-item-wrap--level-1 {
    justify-content: space-between;
    margin-bottom: 0;
  }

  .main-navigation__list-item-link--level-1 {
    flex-grow: 1;
    color: var(--color-text);
  }

  .main-navigation__list-item--active>span>a {
    color: var(--color-brand);
  }

  .main-navigation__list-item__arrow {
    display: flex;
    align-items: center;
    cursor: pointer;
    color: var(--color-brand);
    font-size: 1.2em;
    padding: .5em;
  }

  .main-navigation__list--level-2 {
    display: none;
    padding-left: 1em;
  }

  .main-navigation__list--level-2.main-navigation__list--active {
    display: block;
  }

  .main-navigation__list-item--level-2 {
    margin: .75em 0;
  }

  .main-navigation__list-item-link--level-2 {
    color: var(--color-text);
  }

  .armstrong-headerbar__contact_text {
    display: none !important;
  }

  .armstrong-headerbar__contact_envelope {
    width: 3.5rem;
  }
}

@media (max-width: 767.98px) {
  .language-switcher {
    padding: 0 .5em;
  }
}

/* ============================================================
   站点共享头尾适配（knauf.css 与本页共用时的隔离层）
   页面已换用其他页面同款的 site-header / mobile-menu / site-footer，
   此处确保：头尾容器宽度/内边距与其他页面一致（knauf.css 1400px 规范），
   不受本页 1600px 宽容器规则影响；正文区块保持原布局不变。
   ============================================================ */

/* 头尾容器：恢复 knauf.css 规范（覆盖本页 ≥768px 的 1600px 容器规则） */
.site-header__inner,
.site-footer .container {
  max-width: 1400px;
  padding-left: 40px;
  padding-right: 40px;
}

@media (max-width: 980px) {

  .site-header__inner,
  .site-footer .container {
    padding-left: 28px;
    padding-right: 28px;
  }
}

@media (max-width: 820px) {

  .site-header__inner,
  .site-footer .container {
    padding-left: 20px;
    padding-right: 20px;
  }
}

@media (max-width: 560px) {

  .site-header__inner,
  .site-footer .container {
    padding-left: 16px;
    padding-right: 16px;
  }
}

/* 正文容器：保持原站移动端 15px 内边距（knauf.css 全局 .container 规则会覆盖 Bootstrap） */
@media (max-width: 767.98px) {
  .page__content .container {
    padding-left: 15px;
    padding-right: 15px;
  }
}

/* 头部改为 sticky（knauf.css，z-index 1000），弹层层级相应提高，避免被头部遮挡 */
.region-country-overlay {
  z-index: 1100;
}

.privacy-overlay {
  z-index: 1200;
}

.privacy-overlay__backdrop {
  z-index: 1199;
}


.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.25s;
}

.lightbox.is-open {
  display: flex;
  display: flex;
  opacity: 1;
}

.lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
}

.lightbox__img {
  position: relative;
  z-index: 1;
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
}

.lightbox__close {
  position: absolute;
  top: 20px;
  right: 30px;
  z-index: 2;
  font-size: 48px;
  line-height: 1;
  color: #fff;
  background: none;
  border: none;
  cursor: pointer;
}

.lightbox__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  width: 56px;
  height: 56px;
  font-size: 40px;
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  user-select: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox__nav svg {
  display: inline-block;
  height: .5em;
  width: .5em;
  vertical-align: middle;
  fill: currentColor;
  stroke: currentColor;
  stroke-width: 0;
}

.lightbox__nav:hover {
  background: rgba(255, 255, 255, 0.25);
}

.lightbox__nav--prev {
  left: 24px;
}

.lightbox__nav--next {
  right: 24px;
}

/* 提示图片可点击放大 */
.armstrong-materials__item {
  cursor: zoom-in;
}

@media (max-width: 560px) {
  .lightbox__nav {
    top: 80%;
  }
}

/* 产品网格 */
.product-grid.products {
  padding: 1em 0;
}
.product-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}

.product-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  display: flex; flex-direction: column;
  transition: box-shadow .2s, transform .2s;
}
.product-card:hover {
  box-shadow: 0 16px 40px rgba(0, 0, 0, .08);
  transform: translateY(-3px);
}

.product-card__image {
  aspect-ratio: 4/3;
  background: #eef2f6;
  position: relative; overflow: hidden;
}
.product-card__image svg { width: 100%; height: 100%; display: block; }
.product-card__image img { width: 100%; height: 100%; display: block; object-fit: cover; }

.product-card__body {
  padding: 20px 22px 22px;
  display: flex; flex-direction: column; gap: 10px;
  flex: 1;
}
.product-card__title {
  font-size: 17px; font-weight: 700;
  color: var(--brand);
  line-height: 1.35;
}
.product-card__desc {
  font-size: 14px; color: var(--text-2);
  line-height: 1.6;
  flex: 1;
}
.product-card__link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; font-weight: 600;
  color: var(--brand);
  margin-top: 4px;
}
.product-card__link svg {
  width: 15px; height: 15px;
  fill: var(--brand);
  transition: transform .18s;
}
.product-card:hover .product-card__link svg { transform: translateX(3px); }

/* ===== 响应式 ===== */
@media (max-width: 980px) {
  .catalog-layout { grid-template-columns: 1fr; gap: 28px; }
  .category-tree { position: static; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .page-banner h1 { font-size: 28px; }
}
@media (max-width: 560px) {
  .product-grid { grid-template-columns: 1fr; }
}