/* ==========================================================================
   优客电子 · yoker-tech.com
   尺寸注释里的数字是 1920 宽版面下的像素（内容区 1600 宽）。
   主色 #007cc3 对白底只有 4.49:1，压到 #007bc2（4.54:1）；深色页脚上的链接提亮到 #1a8fd6。
   ========================================================================== */

:root {
	--c-primary: #007bc2;
	--c-primary-dark: #0252b9;
	--c-text: #333;
	--c-muted: #666;
	--c-light: #767676;
	--c-line: #cecece;
	--c-bg-grey: #f1f1f1;
	--c-footer: #07182d;
	--c-footer-link: #1a8fd6;
	--grad-blue: linear-gradient(90deg, #025cd0 0%, #0253ba 20%, #01469d 50%, #013980 78%, #01306a 100%);
	--wrap: 1600px;
	--gutter: 40px;
	--header-h: 100px;
	--radius: 8px;
	--font: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Source Han Sans SC", "Helvetica Neue", Arial, sans-serif;
	--fs-56: clamp(28px, 2.92vw, 56px);
	--fs-52: clamp(28px, 2.71vw, 52px);
	--fs-42: clamp(26px, 2.19vw, 42px);
	--fs-40: clamp(24px, 2.08vw, 40px);
	--fs-36: clamp(20px, 1.875vw, 36px);
	--fs-32: clamp(20px, 1.67vw, 32px);
	--fs-24: clamp(18px, 1.25vw, 24px);
	--fs-20: clamp(16px, 1.04vw, 20px);
}

/* ---------------------------------------------------------------- 基础 */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--header-h) + 10px); }
body { margin: 0; font-family: var(--font); font-size: 16px; line-height: 1.5; color: var(--c-text); background: #fff; -webkit-font-smoothing: antialiased; }
img, video, svg { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--c-primary); }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
h1, h2, h3, h4, p, ul, ol, figure { margin: 0; padding: 0; }
ul, ol { list-style: none; }
:focus-visible { outline: 2px solid var(--c-primary); outline-offset: 2px; }
.screen-reader-text { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.yk-skip:focus { position: fixed !important; left: 10px; top: 10px; z-index: 1000; width: auto; height: auto; clip: auto; padding: 10px 16px; background: #fff; color: var(--c-primary); }
.yk-wrap { width: min(var(--wrap), calc(100% - 2 * var(--gutter))); margin-inline: auto; }
.yk-center { text-align: center; }
.yk-empty { padding: 60px 0; text-align: center; color: var(--c-muted); }
.yk-empty a { color: var(--c-primary); }
.yk-noimg { display: block; width: 100%; height: 100%; min-height: 160px; background: #eef2f7; }
.yk-svg { width: 24px; height: 24px; flex: none; }

/* ---------------------------------------------------------------- 按钮（153×45 蓝底白字 + 箭头） */
.yk-btn { display: inline-flex; align-items: center; justify-content: center; gap: 22px; min-width: 153px; height: 45px; padding: 0 20px; border: 1px solid var(--c-primary); border-radius: 4px; background: var(--c-primary); color: #fff; font-size: 16px; line-height: 1; white-space: nowrap; transition: background .2s, color .2s, border-color .2s; }
.yk-btn .yk-svg { width: 22px; height: 22px; transition: transform .2s; }
.yk-btn:hover { background: #0068a6; border-color: #0068a6; color: #fff; }
.yk-btn:hover .yk-svg { transform: translateX(3px); }
.yk-btn--line { background: #fff; border-color: var(--c-text); color: var(--c-text); }
.yk-btn--line:hover { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }
.yk-btn--sm { min-width: 145px; }
.yk-btn--pill { min-width: 247px; border-radius: 999px; gap: 40px; }

/* ---------------------------------------------------------------- 区块标题：大标题 56px + 108×15 蓝条；小标题 24px + 70×7 蓝条 */
.yk-title { font-size: var(--fs-24); font-weight: 700; line-height: 1.33; color: var(--c-text); }
.yk-title::after { content: ""; display: block; width: 70px; height: 7px; margin-top: 11px; background: var(--c-primary); }
.yk-title--center { text-align: center; }
.yk-title--center::after { margin-inline: auto; }
.yk-title--lg { font-size: var(--fs-56); line-height: 1.32; }
.yk-title--lg::after { width: 108px; height: 15px; margin-top: 20px; }
.yk-title--light { color: #fff; }
.yk-title--light::after { background: #fff; }
.yk-bar-title { display: flex; align-items: center; gap: 24px; font-size: var(--fs-24); font-weight: 700; line-height: 53px; margin-bottom: 30px; }
.yk-bar-title::before { content: ""; width: 16px; height: 53px; background: var(--c-primary); flex: none; }

/* ---------------------------------------------------------------- 页头（100 高，白底，吸顶） */
.yk-header { position: sticky; top: 0; z-index: 100; background: #fff; transition: box-shadow .2s; }
.yk-header.is-scrolled { box-shadow: 0 2px 12px rgba(0, 0, 0, .08); }
.admin-bar .yk-header { top: 32px; }
.yk-header__inner { display: flex; align-items: center; height: var(--header-h); gap: clamp(16px, 2vw, 38px); }
.yk-logo { flex: none; width: clamp(220px, 24.7vw, 475px); }
.yk-logo img { width: 100%; max-height: 60px; object-fit: contain; object-position: left center; } /* 后台换成别的比例的 logo 也不会撑高页头 */
.yk-nav { flex: 1; min-width: 0; }
/* 设计稿 1920 下导航从 x673 到 x1449（776 宽、间距相等）：限宽 + space-between，1920 时位置和设计稿一样；
   窗口窄了、或英文菜单更长时间距自动收小，不会压到右边的语言切换（最小 8px） */
.yk-nav__list { display: flex; align-items: center; justify-content: space-between; gap: 8px; max-width: 776px; }
.yk-nav__list > li { position: relative; }
.yk-nav__list > li > a { display: block; padding: 20px 10px 19px; font-size: 18px; line-height: 24px; white-space: nowrap; border-bottom: 2px solid transparent; }
.yk-nav__list > li.current-menu-item > a, .yk-nav__list > li.current-menu-ancestor > a, .yk-nav__list > li.current_page_parent > a, .yk-nav__list > li > a:hover { color: var(--c-primary); border-bottom-color: var(--c-primary); }
.yk-nav .sub-menu { position: absolute; left: 50%; top: 100%; min-width: 160px; padding: 10px 0; background: #fff; box-shadow: 0 6px 18px rgba(0, 0, 0, .1); transform: translateX(-50%); opacity: 0; visibility: hidden; transition: opacity .2s; }
.yk-nav li:hover > .sub-menu, .yk-nav li:focus-within > .sub-menu { opacity: 1; visibility: visible; }
.yk-nav .sub-menu a { display: block; padding: 8px 20px; white-space: nowrap; }
.yk-header__tools { display: flex; align-items: center; flex: none; gap: clamp(14px, 2.2vw, 44px); }
.yk-lang { display: flex; gap: 6px; font-size: 18px; line-height: 24px; color: var(--c-text); }
.yk-lang a.is-current { color: var(--c-primary); }
.yk-search-toggle { display: grid; place-items: center; width: 30px; height: 30px; padding: 0; border: 0; background: none; color: var(--c-primary); }
.yk-search-toggle .yk-svg { width: 28px; height: 28px; }
.yk-quote { display: inline-flex; align-items: center; height: 35px; padding: 0 15px; margin-left: calc(30px - clamp(14px, 2.2vw, 44px)); border-radius: 4px; background: var(--c-primary); color: #fff; font-size: 16px; white-space: nowrap; }
.yk-quote:hover { background: #0068a6; color: #fff; }
.yk-menu-toggle { display: none; width: 40px; height: 40px; padding: 8px; border: 0; background: none; color: var(--c-text); }
.yk-menu-toggle .is-close { display: none; }
.yk-menu-toggle[aria-expanded="true"] .is-open { display: none; }
.yk-menu-toggle[aria-expanded="true"] .is-close { display: block; }
.yk-search { border-top: 1px solid #eee; background: #fff; box-shadow: 0 8px 18px rgba(0, 0, 0, .08); }
.yk-search__form { display: flex; gap: 0; padding: 20px 0; }
.yk-search__form input { flex: 1; min-width: 0; height: 50px; padding: 0 18px; border: 1px solid var(--c-line); border-right: 0; border-radius: 4px 0 0 4px; outline: none; }
.yk-search__form input:focus { border-color: var(--c-primary); }
.yk-search__form button { display: inline-flex; align-items: center; gap: 8px; height: 50px; padding: 0 26px; border: 0; border-radius: 0 4px 4px 0; background: var(--c-primary); color: #fff; }

/* ---------------------------------------------------------------- 内页大图（650 高，标题 52px，副标题 20px） */
.yk-hero { position: relative; display: flex; align-items: center; min-height: clamp(220px, 33.85vw, 650px); overflow: hidden; background: #0b4fa8; color: #fff; }
.yk-hero__bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 70% center; }
.yk-hero__inner { position: relative; padding: 40px 0 50px; }
.yk-hero__title { font-size: var(--fs-52); font-weight: 700; line-height: 1.33; }
.yk-hero__sub { margin-top: clamp(8px, 1vw, 19px); font-size: var(--fs-20); line-height: 1.5; }
.yk-hero--dark { color: var(--c-text); background: #e8f1fb; }
.yk-hero--dark .yk-hero__sub { color: var(--c-muted); }

/* ---------------------------------------------------------------- 详情页蓝色条（62 高，渐变，左面包屑右搜索） */
.yk-crumbs { margin-top: 18px; background: var(--grad-blue); color: #fff; }
.yk-crumbs__inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 62px; }
.yk-crumbs__trail { display: flex; align-items: center; flex-wrap: wrap; gap: 4px; min-width: 0; font-size: 16px; line-height: 24px; }
.yk-crumbs__trail a:hover { color: #fff; text-decoration: underline; }
.yk-crumbs__trail i { font-style: normal; }
.yk-crumbs__trail [aria-current] { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 60vw; }
.yk-crumbs__home { display: grid; place-items: center; width: 30px; height: 30px; margin-right: 11px; }
.yk-crumbs__home .yk-svg { width: 28px; height: 28px; }
.yk-crumbs__search { display: flex; flex: none; height: 46px; }
.yk-crumbs__search input { width: 275px; height: 46px; padding: 0 14px; border: 1px solid #fff; border-right: 0; background: #fff; color: var(--c-text); outline: none; }
.yk-crumbs__search button { display: grid; place-items: center; width: 64px; height: 46px; border: 1px solid #fff; background: var(--c-primary); color: #fff; }
.yk-crumbs__search button .yk-svg { width: 26px; height: 26px; }

/* ---------------------------------------------------------------- 分页（62×36 圆角） */
.yk-pager { display: flex; justify-content: center; flex-wrap: wrap; gap: clamp(10px, 2.1vw, 41px); margin-top: clamp(40px, 4.8vw, 92px); }
.yk-pager .page-numbers { display: grid; place-items: center; min-width: 62px; height: 36px; padding: 0 10px; border: 1px solid var(--c-line); border-radius: 18px; font-size: 16px; line-height: 26px; color: var(--c-muted); }
.yk-pager a.page-numbers:hover { border-color: var(--c-primary); color: var(--c-primary); }
.yk-pager .page-numbers.current { border-color: var(--c-primary); background: var(--c-primary); color: #fff; }
.yk-pager .page-numbers.dots { border-color: var(--c-line); }

/* ---------------------------------------------------------------- 首页 Banner（1920×750） */
.yk-banner { position: relative; overflow: hidden; background: #062a66; }
.yk-banner__track { position: relative; aspect-ratio: 1920 / 750; min-height: 240px; }
.yk-banner__slide { position: absolute; inset: 0; display: block; opacity: 0; visibility: hidden; transition: opacity .8s ease, visibility .8s; }
.yk-banner__slide.is-active { opacity: 1; visibility: visible; }
.yk-banner__slide img { width: 100%; height: 100%; object-fit: cover; object-position: left center; }
/* 图里没字的 banner：网页文字叠在左半边（设计稿：小字 y195 fs20、大标题 y247 fs52 粗、说明 y335 fs20 宽 557、按钮 y470） */
.yk-banner__text { position: absolute; left: 0; right: 0; top: 26%; color: #fff; }
.yk-banner__text > * { max-width: min(760px, 52%); }
.yk-banner__kicker { margin: 0 0 clamp(10px, 1.2vw, 24px); font-size: var(--fs-20); line-height: 1.3; }
.yk-banner__title { margin: 0 0 clamp(12px, 1.4vw, 26px); font-size: var(--fs-52); font-weight: 700; line-height: 1.2; }
.yk-banner__desc { margin: 0 0 clamp(20px, 2.4vw, 46px); max-width: min(560px, 46%); font-size: var(--fs-20); line-height: 1.55; opacity: .92; }
.yk-banner__nav { position: absolute; left: 0; right: 0; bottom: clamp(20px, 3.75vw, 72px); }
.yk-banner__dots { display: flex; align-items: center; gap: 0; }
.yk-banner__dots button { display: inline-flex; align-items: center; padding: 6px 0; border: 0; background: none; color: #c0c0c0; font-size: 14px; line-height: 18px; }
.yk-banner__dots button::after { content: ""; width: 19px; height: 1px; margin: 0 9px; background: currentColor; transition: width .4s; }
.yk-banner__dots button:last-child::after { display: none; }
.yk-banner__dots button.is-active { color: #fff; }
.yk-banner__dots button.is-active::after { width: 64px; margin: 0 7px 0 4px; background: #fff; display: block; }
.yk-banner__dots button:hover { color: #fff; }

/* ---------------------------------------------------------------- 为什么选择我们（782 高；左蓝 629 宽到屏幕边，右侧 6 张卡片 329×276） */
.yk-why { position: relative; overflow: hidden; margin-top: clamp(40px, 5.05vw, 97px); background: #e5eaf1; }
.yk-why__grid { display: grid; grid-template-columns: 29.3% minmax(0, 1fr); gap: 3.8%; }
.yk-why__panel { position: relative; padding: 50px 0 59px; color: #fff; }
.yk-why__panel::before { content: ""; position: absolute; top: 0; bottom: 0; right: 0; left: -100vw; z-index: 0; background: var(--c-primary); border-top-right-radius: 24px; }
.yk-why__panel > * { position: relative; }
.yk-why__panel .yk-title { white-space: nowrap; }
.yk-why__slogan { margin-top: clamp(30px, 3vw, 57px); font-size: var(--fs-24); font-weight: 700; line-height: 1.33; }
.yk-why__tags { display: grid; gap: 29px; margin-top: clamp(40px, 6.6vw, 126px); max-width: 365px; }
.yk-why__tags li { display: flex; align-items: center; justify-content: center; gap: 15px; height: 72px; border-radius: 6px; background: var(--c-primary-dark); font-size: var(--fs-24); font-weight: 700; }
.yk-why__tags li::before { content: ""; width: 4px; height: 22px; background: #fff; }
.yk-why__body { padding: 69px 0 59px; }
.yk-why__sub { text-align: right; font-size: var(--fs-24); line-height: 1; color: var(--c-primary); }
.yk-why__cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 23px 41px; margin-top: 55px; }
.yk-why__card { min-height: 276px; padding: 43px 20px 30px 55px; background: #fff; transition: transform .25s, box-shadow .25s; }
.yk-why__card:hover { transform: translateY(-4px); box-shadow: 0 12px 30px rgba(0, 60, 120, .12); }
.yk-why__card .yk-icon { width: 72px; height: 72px; }
.yk-why__card h3 { margin-top: 19px; font-size: var(--fs-24); line-height: 32px; }
.yk-why__card p { margin-top: 11px; font-size: 16px; line-height: 24px; color: var(--c-muted); }

/* ---------------------------------------------------------------- 公司视频中心（左封面 880×495 + 右浅蓝 721×495）+ 数据条 */
.yk-video { padding-top: clamp(60px, 6.35vw, 122px); }
.yk-video__box { display: grid; grid-template-columns: 55% 45%; margin-top: clamp(40px, 4.6vw, 88px); }
.yk-video__media { position: relative; aspect-ratio: 880 / 495; overflow: hidden; background: #dfe8f3; }
.yk-video__media > img { width: 100%; height: 100%; object-fit: cover; }
.yk-video__play { position: absolute; left: 50%; top: 50%; width: clamp(72px, 6.7vw, 128px); height: clamp(72px, 6.7vw, 128px); padding: 0; border: 0; border-radius: 50%; background: none; transform: translate(-50%, -50%); transition: transform .2s; }
.yk-video__play img { width: 100%; height: 100%; }
.yk-video__play:hover { transform: translate(-50%, -50%) scale(1.08); }
.yk-video__text { display: flex; flex-direction: column; align-items: flex-start; padding: clamp(28px, 3.5vw, 68px) clamp(16px, 1.2vw, 23px) clamp(28px, 2.3vw, 45px) clamp(24px, 3.3vw, 64px); background: #f6faff; }
.yk-video__text > p { font-size: 16px; line-height: 24px; color: var(--c-muted); }
.yk-video__values { display: flex; flex-wrap: wrap; justify-content: space-between; align-self: stretch; gap: 20px; margin: auto 0 clamp(24px, 3.4vw, 66px) -8px; padding-top: 30px; }
.yk-video__values li { display: flex; align-items: center; gap: 11px; font-size: var(--fs-24); font-weight: 700; }
.yk-video__values .yk-icon { width: 60px; height: 60px; }

.yk-stats--bar { background: var(--grad-blue); color: #fff; }
.yk-stats--bar .yk-stats__list { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px 30px; min-height: 89px; padding: 12px 0; }
.yk-stats__list li { display: flex; align-items: center; gap: 15px; font-size: var(--fs-24); font-weight: 700; line-height: 32px; }
.yk-stats__list .yk-icon { width: 48px; height: 48px; }

/* ---------------------------------------------------------------- 热销产品（4 列 388×399，图 388×314） */
.yk-hot { padding: clamp(60px, 6vw, 115px) 0 clamp(60px, 6.4vw, 123px); }
.yk-hot__grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px 16px; margin: clamp(40px, 3.6vw, 70px) 0 clamp(30px, 1.8vw, 35px); }
.yk-hot__item a { display: block; height: 100%; background: #fff; }
.yk-hot__img { display: block; aspect-ratio: 388 / 314; overflow: hidden; background: #eef3f9; }
.yk-hot__img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.yk-hot__title { display: block; padding: 18px 12px 33px; text-align: center; font-size: var(--fs-24); line-height: 32px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.yk-hot__item a:hover .yk-hot__title { color: var(--c-primary); }
.yk-hot__item a:hover img { transform: scale(1.04); }

/* ---------------------------------------------------------------- 解决方案（998 高背景图；卡片 477×530 白底，图 406×274） */
.yk-sol { position: relative; padding: clamp(60px, 4.5vw, 87px) 0 67px; background: #eef4fb url(../img/bg-solutions.jpg) center / cover no-repeat; }
.yk-sol__sub { margin-top: 23px; font-size: var(--fs-24); font-weight: 700; line-height: 32px; color: var(--c-muted); }
.yk-sol__text { margin-top: 16px; font-size: 16px; line-height: 24px; color: var(--c-muted); }
.yk-sol__cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(20px, 4.4vw, 85px); margin-top: clamp(40px, 5.6vw, 109px); }
.yk-sol__card { display: flex; flex-direction: column; align-items: center; padding: 34px 37px; border-radius: 20px; background: #fff; box-shadow: 0 10px 30px rgba(0, 50, 120, .06); }
.yk-sol__card h3 { align-self: stretch; font-size: var(--fs-32); line-height: 42px; }
.yk-sol__img { align-self: stretch; aspect-ratio: 406 / 274; margin-top: 23px; overflow: hidden; border-radius: 8px; background: #f2f6fb; }
.yk-sol__img img { width: 100%; height: 100%; object-fit: cover; }
.yk-sol__tags { align-self: stretch; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 16px 0 29px; }
.yk-sol__tags li { display: grid; place-items: center; min-height: 33px; padding: 4px 6px; border: 1px solid #d9d9d9; background: #eee; font-size: 16px; line-height: 1.25; text-align: center; } /* 英文标签长，允许折两行 */

/* ---------------------------------------------------------------- 页脚（288 高） */
.yk-footer { background: var(--c-footer); color: #fff; font-size: 14px; line-height: 24px; }
.yk-footer__top { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: 73px 0 33px; border-bottom: 1px solid #d1d1d1; }
.yk-footer__logo { flex: none; width: clamp(240px, 32.7vw, 627px); }
.yk-footer__logo img { max-height: 80px; object-fit: contain; object-position: left center; }
.yk-footer__list { display: flex; flex-wrap: wrap; gap: 10px clamp(20px, 3.8vw, 73px); }
.yk-footer__list a { font-size: 16px; color: var(--c-footer-link); }
.yk-footer__list a:hover { color: #fff; }
.yk-footer__bottom { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); align-items: center; gap: 20px; padding: 32px 0 50px; }
.yk-footer__copy { display: flex; flex-wrap: wrap; gap: 4px 34px; }
.yk-footer__copy a:hover { color: var(--c-footer-link); }
.yk-social { display: flex; gap: 20px; }
.yk-social a { display: block; width: 36px; height: 36px; transition: transform .2s; }
.yk-social a:hover { transform: translateY(-2px); }
.yk-footer__slogan { text-align: right; }

/* ---------------------------------------------------------------- 关于我们：公司简介 */
.yk-intro { padding: clamp(60px, 9.9vw, 191px) 0 clamp(60px, 6.1vw, 118px); }
.yk-intro__grid { display: grid; grid-template-columns: minmax(0, 746fr) minmax(0, 764fr); gap: clamp(30px, 4.7vw, 91px); align-items: start; }
.yk-intro__text { padding-top: 0; }
.yk-intro__img { margin-top: 25px; }
.yk-intro__paras { margin-top: clamp(24px, 2.2vw, 43px); font-size: 16px; line-height: 24px; color: var(--c-muted); }
.yk-intro__paras p { text-indent: 2em; }
.yk-intro__paras p + p { margin-top: 24px; }
.yk-stats--box { margin-top: clamp(30px, 3.3vw, 64px); padding: 23px 23px; border-radius: 12px; background: var(--c-primary); color: #fff; }
.yk-stats--box .yk-stats__list { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 19px 20px; }
.yk-stats--box .yk-stats__list li:nth-child(2n) { padding-left: clamp(0px, 8%, 50px); }
.yk-intro__img { overflow: hidden; border-radius: 10px; box-shadow: 0 10px 30px rgba(0, 0, 0, .08); }
.yk-intro__img img { width: 100%; aspect-ratio: 764 / 476; object-fit: cover; }

/* ---------------------------------------------------------------- 关于我们：发展历程（灰底，年份 42px，波浪线 + 圆点） */
.yk-history { padding: clamp(60px, 4.9vw, 94px) 0 clamp(60px, 6.5vw, 125px); background: var(--c-bg-grey); }
.yk-history__list { position: relative; display: grid; grid-template-columns: repeat(var(--n, 7), minmax(0, 1fr)); gap: 50px 12px; margin-top: clamp(40px, 5.2vw, 100px); }
.yk-history__list::before { content: ""; position: absolute; left: calc(50% / var(--n, 7)); right: calc(50% / var(--n, 7)); top: 100px; height: 76px; background: var(--yk-history-line, url(../img/timeline-wave.png)) center / 100% 100% no-repeat; pointer-events: none; } /* 波浪线可在网站设置里换（about.php 行内 --yk-history-line） */
.yk-history__list li { position: relative; display: flex; flex-direction: column; align-items: center; text-align: center; }
.yk-history__year { font-size: var(--fs-42); line-height: 45px; color: var(--c-primary); }
.yk-history__list h3 { margin-top: 11px; font-size: 16px; line-height: 21px; white-space: nowrap; }
.yk-history__dot { position: relative; width: 21px; height: 21px; margin: 52px 0 49px; border-radius: 50%; background: var(--c-primary); box-shadow: 0 0 0 6px rgba(0, 123, 194, .15); }
.yk-history__list p { max-width: 198px; font-size: 16px; line-height: 21px; }

/* ---------------------------------------------------------------- 关于我们：企业文化（516×352，第一张蓝底，鼠标移到哪张哪张变蓝） */
.yk-culture { padding: clamp(60px, 4.4vw, 84px) 0 0; }
.yk-culture__grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 26px; margin-top: clamp(40px, 3.2vw, 61px); }
.yk-culture__card { display: flex; flex-direction: column; align-items: center; min-height: 352px; padding: 54px 40px 40px; border-radius: 10px; background: var(--c-bg-grey); color: var(--c-text); text-align: center; transition: background .3s, color .3s; }
.yk-culture__icon { width: 80px; height: 80px; background: var(--c-primary); -webkit-mask: var(--ico) center / contain no-repeat; mask: var(--ico) center / contain no-repeat; transition: background .3s; }
.yk-culture__card h3 { margin-top: 47px; font-size: var(--fs-24); font-weight: 400; line-height: 32px; }
.yk-culture__card p { max-width: 435px; margin-top: 21px; font-size: 16px; line-height: 21px; color: var(--c-muted); transition: color .3s; }
.yk-culture__card:first-child, .yk-culture__card:hover { background: var(--c-primary); color: #fff; }
.yk-culture__card:first-child p, .yk-culture__card:hover p { color: #fff; }
.yk-culture__card:first-child .yk-culture__icon, .yk-culture__card:hover .yk-culture__icon { background: #fff; }
.yk-culture__grid:hover .yk-culture__card:first-child:not(:hover) { background: var(--c-bg-grey); color: var(--c-text); }
.yk-culture__grid:hover .yk-culture__card:first-child:not(:hover) p { color: var(--c-muted); }
.yk-culture__grid:hover .yk-culture__card:first-child:not(:hover) .yk-culture__icon { background: var(--c-primary); }

/* ---------------------------------------------------------------- 关于我们：公司环境（一屏 4 张 361×352，下方长条 + 圆点分页） */
.yk-env { padding: clamp(60px, 5vw, 98px) 0 clamp(60px, 6.7vw, 128px); }
.yk-carousel { margin-top: clamp(40px, 3.1vw, 60px); }
.yk-carousel__track { display: grid; grid-auto-flow: column; grid-auto-columns: calc((100% - 3 * 52px) / 4); gap: 52px; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; }
.yk-carousel__track::-webkit-scrollbar { display: none; }
.yk-carousel__track > li { scroll-snap-align: start; overflow: hidden; border-radius: 6px; }
.yk-carousel__track img { width: 100%; aspect-ratio: 361 / 352; object-fit: cover; }
.yk-carousel__dots { display: flex; justify-content: center; gap: 12px; margin-top: 46px; }
.yk-carousel__dots button { width: 21px; height: 21px; padding: 0; border: 0; border-radius: 11px; background: #d9d9d9; transition: width .3s, background .3s; }
.yk-carousel__dots button.is-active { width: 249px; background: var(--c-primary); }

/* ---------------------------------------------------------------- 关于我们：合作伙伴（631 高，深蓝背景图，右侧 4×4 logo） */
.yk-partners { position: relative; overflow: hidden; background: #02204d; color: #fff; }
.yk-partners__bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.yk-partners__grid { position: relative; display: grid; grid-template-columns: minmax(260px, 1fr) minmax(0, 965px); gap: 40px; align-items: center; min-height: 631px; padding: 60px 0; }
.yk-partners__en { font-size: var(--fs-40); line-height: 53px; color: #3a9be0; }
.yk-partners__head .yk-title { margin-top: 11px; }
.yk-partners__btn { display: inline-grid; place-items: center; width: 261px; height: 50px; margin-top: clamp(40px, 9.3vw, 180px); border-radius: 25px; background: var(--c-primary); color: #fff; font-size: var(--fs-24); font-weight: 700; }
.yk-partners__btn:hover { background: #0068a6; color: #fff; }
.yk-partners__logos { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 30px 47px; }
.yk-partners__logos img { width: 100%; height: auto; }

/* ---------------------------------------------------------------- 产品中心：分类标签 + 4 列卡片（359×485，图 359×318） */
.yk-products { padding: clamp(40px, 4.6vw, 89px) 0 clamp(60px, 8.9vw, 170px); }
.yk-cats { position: relative; z-index: 5; margin-bottom: clamp(30px, 3.4vw, 70px); }
.yk-cats__list { display: flex; flex-wrap: wrap; align-items: center; }
.yk-cats__item { position: relative; display: flex; align-items: center; font-size: var(--fs-20); line-height: 59px; }
.yk-cats__item + .yk-cats__item::before { content: "|"; padding: 0 clamp(12px, 1.5vw, 28px); color: var(--c-text); }
.yk-cats__item > a { white-space: nowrap; }
.yk-cats__item.is-active > a { color: var(--c-primary); }
.yk-cats__more { display: none; width: 30px; height: 30px; padding: 3px; border: 0; background: none; color: inherit; }
.yk-cats__sub { position: absolute; left: -25px; top: 100%; min-width: 173px; padding: 12px 25px; background: #fdfdfd; box-shadow: 0 4px 14px rgba(0, 0, 0, .12); opacity: 0; visibility: hidden; transform: translateY(6px); transition: opacity .2s, transform .2s; }
.yk-cats__item + .yk-cats__item .yk-cats__sub { left: calc(clamp(12px, 1.5vw, 28px) * 2 - 25px + .4em); }
.yk-cats__sub a { display: block; font-size: var(--fs-20); line-height: 36px; white-space: nowrap; }
.yk-cats__sub li.is-active a { color: var(--c-primary); }
.yk-cats__item.has-sub:hover .yk-cats__sub, .yk-cats__item.has-sub:focus-within .yk-cats__sub { opacity: 1; visibility: visible; transform: none; }
.yk-pgrid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 37px clamp(16px, 2.9vw, 55px); }
.yk-pcard { display: flex; flex-direction: column; align-items: center; border: 1px solid #f1f1f1; background: #fff; padding-bottom: 40px; transition: border-color .2s, box-shadow .2s; }
.yk-pcard__img { display: block; align-self: stretch; aspect-ratio: 359 / 318; overflow: hidden; background: #eef3f9; }
.yk-pcard__img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.yk-pcard__title { align-self: stretch; margin: 36px 20px 31px; font-size: 16px; font-weight: 400; line-height: 24px; color: var(--c-muted); text-align: center; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.yk-pcard:hover { border-color: var(--c-primary); box-shadow: 0 8px 24px rgba(0, 60, 120, .08); }
.yk-pcard:hover .yk-pcard__img img { transform: scale(1.04); }
.yk-pcard:hover .yk-btn--line { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }
.yk-pcard:hover .yk-pcard__title a { color: var(--c-primary); }

/* ---------------------------------------------------------------- 产品详情 */
.yk-pd { padding: clamp(40px, 6.1vw, 116px) 0 clamp(60px, 5.3vw, 102px); }
.yk-pd__top { display: grid; grid-template-columns: 540px minmax(0, 1fr); gap: clamp(30px, 6.9vw, 133px); margin-bottom: clamp(40px, 3vw, 58px); }
.yk-gallery { display: grid; grid-template-columns: 437px 91px; gap: 12px; align-items: start; }
.yk-gallery__main { border: 1px solid #ddd; background: #f5f8fc; aspect-ratio: 437 / 445; overflow: hidden; }
.yk-gallery__slide { height: 100%; }
.yk-gallery__slide img { width: 100%; height: 100%; object-fit: cover; }
.yk-gallery__side { display: flex; flex-direction: column; gap: 12px; height: 100%; max-height: 445px; }
.yk-gallery__arrow { display: grid; place-items: center; height: 21px; padding: 0; border: 0; background: var(--c-bg-grey); color: var(--c-muted); flex: none; }
.yk-gallery__arrow .yk-svg { width: 18px; height: 18px; }
.yk-gallery__arrow--next { background: var(--c-primary); color: #fff; }
.yk-gallery__thumbs { display: flex; flex-direction: column; gap: 19px; flex: 1; overflow: hidden; scroll-behavior: auto; }
.yk-gallery__thumbs button { display: block; width: 91px; height: 81px; padding: 0; border: 1px solid #ddd; background: #fff; flex: none; }
.yk-gallery__thumbs button.is-active { border-color: var(--c-primary); }
.yk-gallery__thumbs img { width: 100%; height: 100%; object-fit: cover; }
.yk-pd__title { font-size: var(--fs-36); line-height: 1.33; }
.yk-pd__tag { display: inline-grid; place-items: center; min-width: 131px; height: 34px; margin-top: 27px; padding: 0 16px; border: 1px solid #d9d9d9; border-radius: 4px; background: #ececec; color: var(--c-primary); font-size: 16px; letter-spacing: .2em; }
.yk-pd__excerpt { margin-top: 24px; font-size: 16px; line-height: 28px; color: var(--c-muted); }
.yk-pd__info { display: flex; flex-direction: column; align-items: flex-start; padding-bottom: 49px; }
.yk-pd__info .yk-btn { margin: auto 0 0 12px; }
.yk-pd__sec { margin-top: clamp(30px, 2.3vw, 45px); }
.yk-prose { font-size: 16px; line-height: 32px; color: var(--c-muted); overflow-wrap: anywhere; }
.yk-prose > * + * { margin-top: 1em; }
.yk-prose img { border-radius: 10px; margin-inline: auto; }
.yk-prose h2, .yk-prose h3 { color: var(--c-text); line-height: 1.5; }
.yk-prose a { color: var(--c-primary); text-decoration: underline; }
.yk-prose ul { list-style: disc; padding-left: 1.5em; }
.yk-prose ol { list-style: decimal; padding-left: 1.5em; }
.yk-prose table { width: 100%; border-collapse: collapse; }
.yk-prose th, .yk-prose td { padding: 8px 12px; border: 1px solid #ddd; }
.yk-prose figure { margin-inline: auto; }
.yk-pd__apps { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(20px, 3.3vw, 64px) clamp(20px, 5.5vw, 106px); margin-top: 18px; }
.yk-pd__apps figure { overflow: hidden; }
.yk-pd__apps figure.is-wide { grid-column: 1 / -1; }
.yk-pd__apps img { width: 100%; aspect-ratio: 747 / 436; object-fit: cover; }
.yk-pd__apps figure.is-wide img { aspect-ratio: 1599 / 421; }

/* ---------------------------------------------------------------- 资质认证（标签 + 4 列证书 350×460） */
.yk-certs { padding: clamp(40px, 4.8vw, 93px) 0 clamp(60px, 13vw, 250px); }
.yk-tabs { display: flex; gap: 68px; margin-bottom: clamp(30px, 3.9vw, 73px); font-size: 16px; line-height: 21px; }
.yk-tabs a.is-active { color: var(--c-primary); }
.yk-certs__grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 63px clamp(16px, 3.5vw, 67px); }
.yk-certs__grid a { display: block; transition: transform .25s, box-shadow .25s; }
.yk-certs__grid a:hover { transform: translateY(-4px); box-shadow: 0 12px 28px rgba(0, 0, 0, .12); }
.yk-certs__grid img { width: 100%; aspect-ratio: 350 / 460; object-fit: cover; }
.yk-lightbox { position: fixed; inset: 0; z-index: 1000; display: grid; place-items: center; padding: 40px 20px; background: rgba(0, 0, 0, .8); }
.yk-lightbox img, .yk-lightbox video { max-width: min(1100px, 100%); max-height: calc(100vh - 80px); width: auto; height: auto; background: #000; }
.yk-lightbox__close { position: absolute; right: 16px; top: 16px; width: 44px; height: 44px; padding: 10px; border: 0; border-radius: 50%; background: rgba(255, 255, 255, .15); color: #fff; }

/* ---------------------------------------------------------------- 新闻资讯：行业新闻（3 张 503×693 卡片） */
.yk-news-top { padding: clamp(36px, 2.6vw, 50px) 0 0; }
.yk-ncards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(16px, 2.7vw, 51px); margin-top: 45px; }
.yk-ncard { display: flex; flex-direction: column; border-radius: 8px; background: #f0f0f0; overflow: hidden; }
.yk-ncard__img { display: block; aspect-ratio: 503 / 375; overflow: hidden; border-radius: 8px; }
.yk-ncard__img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.yk-ncard:hover .yk-ncard__img img { transform: scale(1.04); }
.yk-ncard__title { margin: 41px 34px 0; font-size: var(--fs-36); line-height: 1.33; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; min-height: 4em; }
.yk-ncard .yk-btn { align-self: flex-end; margin: auto 25px 22px 0; }
.yk-ncard__title + .yk-btn { margin-top: 30px; }

/* ---------------------------------------------------------------- 新闻资讯：公司资讯列表（左图 533×330 + 日期块，右文字） */
.yk-news-list { padding: clamp(50px, 5.9vw, 115px) 0 clamp(60px, 8.9vw, 170px); }
.yk-news-list--archive { padding-top: clamp(40px, 4vw, 80px); }
.yk-nlist { display: grid; gap: 65px; margin-top: 42px; }
.yk-news-list--archive .yk-nlist { margin-top: 0; }
.yk-nitem { display: grid; grid-template-columns: 533px minmax(0, 1fr); gap: 107px; align-items: start; }
.yk-nitem__img { position: relative; display: block; aspect-ratio: 533 / 330; overflow: hidden; border-radius: 6px; }
.yk-nitem__img > img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.yk-nitem:hover .yk-nitem__img > img { transform: scale(1.04); }
.yk-date { position: absolute; left: 28px; top: 11px; display: flex; flex-direction: column; align-items: center; justify-content: center; width: 76px; height: 76px; border-radius: 4px; background: var(--c-primary); color: #fff; line-height: 21px; }
.yk-date b { font-size: 24px; font-weight: 400; }
.yk-date i { width: 31px; height: 1px; margin: 5px 0 3px; background: #fff; }
.yk-date span { font-size: 16px; }
.yk-nitem__body { display: flex; flex-direction: column; align-items: flex-start; max-width: 665px; padding-top: 11px; }
.yk-nitem__title { font-size: var(--fs-36); line-height: 1.33; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.yk-nitem__text { margin-top: 20px; font-size: 16px; line-height: 32px; color: var(--c-muted); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.yk-nitem__body .yk-btn { margin-top: 40px; }

/* ---------------------------------------------------------------- 新闻详情 */
.yk-article { padding: clamp(30px, 2.7vw, 52px) 0 clamp(60px, 9.5vw, 183px); }
.yk-article__back { display: inline-block; font-size: var(--fs-20); line-height: 26px; }
.yk-article__head { margin-top: clamp(40px, 4.6vw, 90px); text-align: center; }
.yk-article__title { font-size: var(--fs-36); line-height: 1.33; }
.yk-article__meta { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px 92px; margin-top: 29px; font-size: 16px; line-height: 21px; color: var(--c-light); }
.yk-article__meta b { font-weight: 400; }
.yk-article__body { margin-top: 41px; }
.yk-article__body img { max-width: 628px; width: 100%; }
.yk-article__body .wp-block-image { margin-block: 60px; }
.yk-article__nav { display: grid; gap: 31px; margin-top: clamp(50px, 4.4vw, 85px); padding-top: 57px; border-top: 1px solid #555; }
.yk-article__nav a { display: flex; align-items: center; gap: 29px; min-width: 0; }
.yk-article__nav span { display: grid; place-items: center; flex: none; width: 125px; height: 36px; border: 1px solid var(--c-line); border-radius: 18px; font-size: 16px; color: var(--c-light); transition: background .2s, color .2s, border-color .2s; }
.yk-article__nav b { font-weight: 400; font-size: 16px; line-height: 21px; color: var(--c-light); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.yk-article__nav a.is-prev span { border-color: var(--c-primary); background: var(--c-primary); color: #fff; }
.yk-article__nav a.is-prev b { color: var(--c-text); }
.yk-article__nav a:hover span { border-color: var(--c-primary); background: var(--c-primary); color: #fff; }
.yk-article__nav a:hover b { color: var(--c-primary); }

.yk-subscribe { position: relative; overflow: hidden; margin-bottom: 56px; background: #e3eefc; }
.yk-subscribe__bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: right center; }
.yk-subscribe__inner { position: relative; display: flex; align-items: center; justify-content: space-between; gap: 30px; min-height: 313px; padding: 40px 0; }
.yk-subscribe__inner .yk-btn { margin-right: clamp(0px, 10vw, 205px); }
.yk-subscribe__title { font-size: var(--fs-36); line-height: 48px; }
.yk-subscribe__text { margin-top: 15px; font-size: 16px; line-height: 24px; color: var(--c-muted); }

/* ---------------------------------------------------------------- 联系我们 */
.yk-contact { padding: clamp(50px, 5vw, 97px) 0 clamp(60px, 11.5vw, 221px); }
.yk-contact__grid { display: grid; grid-template-columns: minmax(0, 756fr) minmax(0, 643fr); gap: clamp(30px, 10.5vw, 201px); align-items: start; }
.yk-contact__list { display: grid; gap: 42px; margin-top: 61px; }
.yk-contact__list li { display: grid; grid-template-columns: 54px minmax(0, 1fr); gap: 45px; align-items: start; }
.yk-contact__list .yk-icon { width: 54px; height: 54px; }
.yk-contact__list h3 { font-size: 20px; line-height: 21px; }
.yk-contact__list p { margin-top: 10px; font-size: 16px; line-height: 21px; overflow-wrap: anywhere; }
.yk-contact__map { margin-top: 63px; overflow: hidden; }
.yk-contact__map img { width: 100%; aspect-ratio: 756 / 331; object-fit: cover; }
.yk-contact__intro { margin-top: 25px; font-size: 16px; line-height: 21px; }
.yk-form { margin-top: 42px; }
.yk-form__row + .yk-form__row { margin-top: 31px; }
.yk-form input[type="text"], .yk-form input[type="tel"], .yk-form input[type="email"], .yk-form textarea { display: block; width: 100%; height: 61px; padding: 0 24px; border: 1px solid #f8f8f8; border-radius: 8px; background: #f8f8f8; font-size: 16px; outline: none; transition: border-color .2s, background .2s; }
.yk-form textarea { height: 169px; padding: 18px 24px; resize: vertical; line-height: 24px; }
.yk-form input:focus, .yk-form textarea:focus { border-color: var(--c-primary); background: #fff; }
.yk-form ::placeholder { color: #8f8f8f; opacity: 1; }
.yk-form .is-invalid { border-color: #d63638 !important; }
.yk-form__hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.yk-form__consent { margin-top: 13px; font-size: 16px; line-height: 21px; color: #6f6f6f; }
.yk-form__consent label { display: flex; align-items: flex-start; gap: 12px; padding-left: 6px; cursor: pointer; }
.yk-form__consent input { appearance: none; -webkit-appearance: none; flex: none; width: 18px; height: 18px; margin: 2px 0 0; border-radius: 50%; background: #d9d9d9; cursor: pointer; }
.yk-form__consent input:checked { background: var(--c-primary) radial-gradient(circle, #fff 0 3px, transparent 3.5px); }
.yk-form__consent a { color: var(--c-primary); }
.yk-form__msg { min-height: 0; margin-top: 10px; font-size: 15px; }
.yk-form__msg.is-error { color: #d63638; }
.yk-form__msg.is-ok { color: #1a7f37; }
.yk-form__submit { display: block; width: 100%; height: 61px; margin-top: 10px; border: 0; border-radius: 8px; background: var(--c-primary); color: #fff; font-size: 20px; transition: background .2s; }
.yk-form__submit:hover { background: #0068a6; }
.yk-form__submit[disabled] { opacity: .6; cursor: wait; }

/* ---------------------------------------------------------------- 普通页面 / 搜索 / 404 */
.yk-page { padding: clamp(40px, 4vw, 80px) 0 clamp(60px, 6vw, 120px); }
.yk-page__title { margin-bottom: 40px; text-align: center; }
.yk-page .yk-prose { max-width: 1000px; margin-inline: auto; line-height: 30px; }
.yk-searchres { padding: clamp(40px, 4vw, 70px) 0 clamp(60px, 6vw, 120px); }
.yk-searchres__title { margin-bottom: 40px; font-size: var(--fs-24); }
.yk-searchres .yk-bar-title { margin-top: 40px; }
.yk-404 { padding: clamp(60px, 7vw, 140px) 0; text-align: center; }
.yk-404__code { font-size: clamp(80px, 9vw, 160px); font-weight: 700; line-height: 1; color: var(--c-primary); }
.yk-404__title { margin-top: 20px; font-size: var(--fs-32); }
.yk-404__text { margin-top: 16px; color: var(--c-muted); }
.yk-404__links { display: flex; justify-content: center; gap: 20px; margin-top: 36px; }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1600px) {
	.yk-why__card { padding-left: clamp(24px, 2.8vw, 55px); }
	.yk-pd__top { grid-template-columns: minmax(0, 540px) minmax(0, 1fr); }
	.yk-gallery { grid-template-columns: minmax(0, 1fr) 91px; }
}
@media (max-width: 1440px) {
	.yk-nav__list > li > a { font-size: 17px; padding-inline: 6px; }
	.yk-lang { font-size: 16px; }
	.yk-why__cards { gap: 20px; }
	.yk-why__card { min-height: 240px; padding-top: 32px; }
	.yk-nitem { grid-template-columns: 45% minmax(0, 1fr); gap: 50px; }
	.yk-history__list h3 { white-space: normal; }
	.yk-partners__logos { gap: 20px; }
}
@media (max-width: 1200px) {
	:root { --header-h: 80px; }
	.yk-nav__list > li > a { font-size: 16px; padding: 14px 4px; }
	.yk-quote { display: none; }
	.yk-why__grid { grid-template-columns: 32% minmax(0, 1fr); }
	.yk-why__cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
	.yk-video__box { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
	.yk-video__media { aspect-ratio: auto; min-height: 100%; }
	.yk-hot__grid, .yk-pgrid, .yk-certs__grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
	.yk-sol__card { padding: 26px 22px; }
	.yk-sol__tags { gap: 8px; }
	.yk-sol__tags li { font-size: 14px; }
	.yk-btn--pill { min-width: 0; width: 100%; gap: 20px; }
	.yk-history__list { grid-template-columns: repeat(4, minmax(0, 1fr)); }
	.yk-history__list::before { display: none; }
	.yk-history__dot { margin: 22px 0; }
	.yk-partners__grid { grid-template-columns: minmax(0, 1fr); min-height: 0; }
	.yk-partners__btn { margin-top: 30px; }
	.yk-pd__top { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 40px; }
	.yk-gallery { grid-template-columns: minmax(0, 1fr) 80px; }
	.yk-gallery__thumbs button { width: 80px; height: 72px; }
	.yk-contact__grid { gap: 50px; }
}
@media (max-width: 992px) {
	:root { --header-h: 64px; --gutter: 20px; }
	.admin-bar .yk-header { top: 46px; }
	.yk-header__inner { gap: 12px; }
	.yk-logo { width: 220px; }
	.yk-header__tools { margin-left: auto; gap: 14px; }
	.yk-quote { display: none; }
	.yk-menu-toggle { display: block; }
	.yk-nav { position: fixed; left: 0; right: 0; top: var(--header-h); bottom: 0; z-index: 99; padding: 10px 20px 40px; overflow-y: auto; background: #fff; border-top: 1px solid #eee; transform: translateX(100%); visibility: hidden; transition: transform .3s, visibility .3s; }
	.admin-bar .yk-nav { top: calc(var(--header-h) + 46px); }
	.yk-nav.is-open { transform: none; visibility: visible; }
	.yk-nav__list { flex-direction: column; align-items: stretch; justify-content: flex-start; gap: 0; max-width: none; }
	.yk-nav__list > li > a { padding: 16px 4px; font-size: 17px; border-bottom: 1px solid #eee; }
	.yk-nav__list > li.current-menu-item > a { border-bottom-color: #eee; }
	.yk-nav .sub-menu { position: static; transform: none; opacity: 1; visibility: visible; box-shadow: none; padding: 0 0 0 16px; }
	body.nav-open { overflow: hidden; }

	.yk-why__grid { grid-template-columns: minmax(0, 1fr); gap: 0; }
	.yk-why__panel { padding: 40px 0; }
	.yk-why__panel::before { left: -50vw; right: -50vw; border-radius: 0; }
	.yk-why__tags { grid-template-columns: repeat(3, minmax(0, 1fr)); max-width: none; gap: 12px; margin-top: 30px; }
	.yk-why__tags li { height: 52px; }
	.yk-why__body { padding: 30px 0 40px; }
	.yk-why__sub { text-align: left; line-height: 1.5; }
	.yk-why__cards { margin-top: 24px; }
	.yk-video__box { grid-template-columns: minmax(0, 1fr); }
	.yk-video__media { aspect-ratio: 880 / 495; }
	.yk-stats--bar .yk-stats__list { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); padding: 20px 0; }
	.yk-sol__cards { grid-template-columns: minmax(0, 1fr); max-width: 560px; margin-inline: auto; }
	.yk-footer__top { flex-direction: column; align-items: flex-start; padding-top: 50px; }
	.yk-footer__bottom { grid-template-columns: minmax(0, 1fr); padding-bottom: 36px; }
	.yk-footer__slogan { text-align: left; }
	.yk-intro__grid { grid-template-columns: minmax(0, 1fr); }
	.yk-intro__text { padding-top: 0; }
	.yk-culture__grid { grid-template-columns: minmax(0, 1fr); }
	.yk-culture__card { min-height: 0; padding: 36px 24px; }
	.yk-culture__card h3 { margin-top: 24px; }
	.yk-carousel__track { grid-auto-columns: calc((100% - 20px) / 2); gap: 20px; }
	.yk-carousel__dots button.is-active { width: 120px; }
	.yk-cats__item { line-height: 44px; }
	.yk-pd__top { grid-template-columns: minmax(0, 1fr); }
	.yk-pd__info { padding-bottom: 0; }
	.yk-pd__info .yk-btn { margin: 30px 0 0; }
	.yk-ncards { grid-template-columns: minmax(0, 1fr); max-width: 560px; margin-inline: auto; }
	.yk-nitem { grid-template-columns: minmax(0, 1fr); gap: 20px; }
	.yk-contact__grid { grid-template-columns: minmax(0, 1fr); }
	.yk-crumbs { margin-top: 0; }
	.yk-crumbs__inner { flex-wrap: wrap; padding: 10px 0; }
	.yk-crumbs__search { width: 100%; }
	.yk-crumbs__search input { flex: 1; width: auto; }
	.yk-subscribe__inner { flex-direction: column; align-items: flex-start; min-height: 0; padding: 50px 0; }
	.yk-subscribe__bg { opacity: .5; }
}
@media (max-width: 768px) {
	.yk-banner__text { top: 50%; transform: translateY(-50%); }
	.yk-banner__text > * { max-width: 62%; }
	.yk-banner__kicker, .yk-banner__desc { display: none; }
	.yk-banner__title { font-size: 20px; margin-bottom: 14px; }
	.yk-banner__text .yk-btn { min-width: 0; height: 36px; padding: 0 14px; gap: 10px; font-size: 14px; }
	.yk-banner__track { aspect-ratio: auto; height: clamp(220px, 58vw, 420px); }
	.yk-lang { font-size: 15px; }
	.yk-hot__grid, .yk-pgrid, .yk-certs__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
	.yk-hot__title { padding: 12px 8px 18px; font-size: 16px; line-height: 24px; }
	.yk-pcard { padding-bottom: 20px; }
	.yk-pcard__title { margin: 16px 10px; }
	.yk-pcard .yk-btn { min-width: 0; height: 38px; padding: 0 14px; gap: 10px; font-size: 14px; }
	.yk-history__list { grid-template-columns: minmax(0, 1fr); gap: 0; padding-left: 36px; }
	.yk-history__list::after { content: ""; position: absolute; left: 10px; top: 10px; bottom: 10px; width: 2px; background: rgba(0, 123, 194, .25); }
	.yk-history__list li { align-items: flex-start; text-align: left; padding-bottom: 28px; }
	.yk-history__dot { position: absolute; left: -36px; top: 10px; margin: 0; }
	.yk-history__list p { max-width: none; margin-top: 6px; }
	.yk-partners__logos { grid-template-columns: repeat(2, minmax(0, 1fr)); }
	.yk-article__meta { gap: 8px 30px; }
	.yk-article__nav a { gap: 14px; }
	.yk-article__nav span { width: 90px; }
	.yk-tabs { gap: 32px; }
}
@media (max-width: 576px) {
	.yk-logo { width: 180px; }
	.yk-lang { gap: 3px; font-size: 14px; } /* 英文上线后手机上也要能切换语言（原来这里是隐藏） */
	.yk-why__tags li { font-size: 15px; gap: 8px; }
	.yk-why__tags li::before { height: 16px; }
	.yk-why__cards { grid-template-columns: minmax(0, 1fr); }
	.yk-why__card { min-height: 0; }
	.yk-video__values li { font-size: 17px; }
	.yk-video__values .yk-icon { width: 44px; height: 44px; }
	.yk-stats__list li { font-size: 16px; gap: 10px; }
	.yk-stats__list .yk-icon { width: 36px; height: 36px; }
	.yk-stats--box .yk-stats__list li:nth-child(2n) { padding-left: 0; }
	.yk-carousel__track { grid-auto-columns: 82%; gap: 14px; }
	.yk-carousel__dots button.is-active { width: 64px; }
	.yk-gallery { grid-template-columns: minmax(0, 1fr); }
	.yk-gallery__side { flex-direction: row; max-height: none; }
	.yk-gallery__arrow { display: none; }
	.yk-gallery__thumbs { flex-direction: row; gap: 10px; overflow-x: auto; }
	.yk-pd__apps { grid-template-columns: minmax(0, 1fr); }
	.yk-contact__list li { gap: 20px; }
	.yk-404__links { flex-direction: column; align-items: center; }
}
/* 小屏手机：页头多了 CN / EN 之后放不下（360 宽会横向滚动），logo 和图标间距再收一点 */
@media (max-width: 380px) {
	.yk-logo { width: 140px; }
	.yk-header__tools { gap: 10px; }
}
@media (max-width: 340px) {
	.yk-logo { width: 116px; }
}

@media (prefers-reduced-motion: reduce) {
	*, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; scroll-behavior: auto !important; }
}

/* 手机上产品分类的子分类：点小箭头展开（放在最后，覆盖上面的悬停下拉） */
@media (max-width: 992px) {
	.yk-cats__list { gap: 4px 0; }
	.yk-cats__more { display: inline-grid; place-items: center; }
	.yk-cats__more[aria-expanded="true"] .yk-svg { transform: rotate(180deg); }
	.yk-cats__item.has-sub:hover .yk-cats__sub { opacity: 0; visibility: hidden; }
	.yk-cats__item.is-open .yk-cats__sub, .yk-cats__item.is-open:hover .yk-cats__sub { opacity: 1; visibility: visible; transform: none; z-index: 6; }
}

/* 手机上：内页大图文字压在图片上，加一层渐变保证可读；产品分类改成圆角标签 */
@media (max-width: 768px) {
	.yk-hero__inner { z-index: 1; }
	.yk-hero::after { content: ""; position: absolute; inset: 0; z-index: 0; background: linear-gradient(90deg, rgba(0, 50, 130, .8) 0%, rgba(0, 50, 130, .5) 60%, rgba(0, 50, 130, .1) 100%); }
	.yk-hero--dark::after { background: linear-gradient(90deg, rgba(255, 255, 255, .9) 0%, rgba(255, 255, 255, .55) 60%, rgba(255, 255, 255, .1) 100%); }
	.yk-cats__list { gap: 8px; }
	.yk-cats__item { line-height: 1; }
	.yk-cats__item + .yk-cats__item::before { display: none; }
	.yk-cats__item > a { display: block; padding: 9px 14px; border: 1px solid var(--c-line); border-radius: 18px; font-size: 15px; line-height: 18px; }
	.yk-cats__item.is-active > a { border-color: var(--c-primary); background: var(--c-primary); color: #fff; }
	.yk-cats__item + .yk-cats__item .yk-cats__sub, .yk-cats__sub { left: 0; top: calc(100% + 6px); }
}