/* ==========================================================
   杭州环康科技有限公司 企业官网 - 主样式
   风格参照：希望树（Full Of Hope）—— 绿色 + 白色 · 自然环保
   ========================================================== */
:root {
  --green:      #2f9e44;   /* 品牌主绿 */
  --green-mid:  #43a862;
  --green-deep: #14532d;   /* 深绿 */
  --green-dark: #0f3d22;   /* 页脚深绿 */
  --green-bg:   #f4faf6;   /* 浅绿底 */
  --green-soft: #e7f4ec;
  --ink:        #22301f;
  --text:       #3d4a42;
  --muted:      #7d8c82;
  --line:       #e3ede6;
  --white:      #ffffff;
  --shadow:     0 12px 30px rgba(20, 83, 45, .10);
  --radius:     14px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--white);
  font-size: 15px;
  line-height: 1.75;
}
a { color: inherit; text-decoration: none; transition: color .25s; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
.container { max-width: 1230px; margin: 0 auto; padding: 0 20px; }

/* ---------- 顶部通栏 ---------- */
.topbar { background: var(--green-deep); color: #d7ecdc; font-size: 13px; }
.topbar-inner { display: flex; justify-content: space-between; align-items: center; padding: 9px 20px; gap: 12px; }
.topbar-right strong { color: #fff; font-size: 16px; letter-spacing: 1px; }
.topbar-right em { font-style: normal; margin-left: 14px; opacity: .85; }

/* ---------- 页头导航 ---------- */
.site-header {
  background: var(--white);
  box-shadow: 0 2px 14px rgba(20, 83, 45, .08);
  position: sticky; top: 0; z-index: 100;
}
.header-inner { display: flex; justify-content: space-between; align-items: center; padding: 12px 20px; gap: 16px; }
.logo { display: flex; flex-direction: column; line-height: 1.25; }
.logo-cn { font-size: 30px; font-weight: bold; color: var(--green-deep); letter-spacing: 3px; }
.logo-cn b { color: var(--green); }
.logo-en { font-size: 11px; color: var(--green); letter-spacing: 5px; }
.main-nav ul { display: flex; gap: 2px; }
.main-nav a {
  display: block; padding: 12px 20px; font-size: 16px; color: var(--text);
  border-radius: 6px; position: relative; white-space: nowrap;
}
.main-nav a::after {
  content: ""; position: absolute; left: 50%; bottom: 6px; transform: translateX(-50%);
  width: 0; height: 3px; border-radius: 2px; background: var(--green); transition: width .25s;
}
.main-nav a:hover, .main-nav a.active { color: var(--green-deep); font-weight: bold; }
.main-nav a:hover::after, .main-nav a.active::after { width: 26px; }
.nav-toggle { display: none; background: none; border: 1px solid var(--line); border-radius: 6px; font-size: 20px; padding: 4px 12px; color: var(--green-deep); cursor: pointer; }

/* ---------- 首页轮播 ---------- */
.slider { position: relative; height: 540px; overflow: hidden; background: var(--green-soft); }
.slide {
  position: absolute; inset: 0; opacity: 0; transition: opacity .9s ease;
  background-size: cover; background-position: center top;
}
.slide.active { opacity: 1; }
.slide-caption {
  position: absolute; left: 8%; top: 50%; transform: translateY(-50%);
  background: rgba(15, 61, 34, .58); color: #fff; padding: 24px 38px;
  border-left: 5px solid var(--green-mid); font-size: 30px; letter-spacing: 5px;
  backdrop-filter: blur(2px); border-radius: 0 10px 10px 0;
}
.slide-caption em { display: block; font-style: normal; font-size: 15px; letter-spacing: 2px; margin-top: 10px; opacity: .92; }
.slider-dots { position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%); display: flex; gap: 10px; z-index: 5; }
.slider-dots span { width: 36px; height: 5px; background: rgba(255,255,255,.45); cursor: pointer; border-radius: 3px; transition: background .3s; }
.slider-dots span.on { background: var(--green-mid); }
.slider-btn {
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 5;
  width: 46px; height: 46px; border: none; border-radius: 50%;
  background: rgba(15, 61, 34, .30); color: #fff; font-size: 26px; cursor: pointer; transition: background .25s;
}
.slider-btn:hover { background: var(--green); }
.slider-btn.prev { left: 18px; }
.slider-btn.next { right: 18px; }

/* ---------- 数字统计 ---------- */
.stats-band { background: var(--white); padding: 54px 0 46px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.stat-item { text-align: center; padding: 10px 8px; position: relative; }
.stat-item + .stat-item::before {
  content: ""; position: absolute; left: 0; top: 18%; height: 64%; width: 1px; background: var(--line);
}
.stat-num { font-size: 46px; font-weight: bold; color: var(--green); line-height: 1.1; font-family: "Arial Narrow", Arial, sans-serif; }
.stat-num small { font-size: 20px; font-weight: bold; margin-left: 2px; }
.stat-label { font-size: 17px; color: var(--ink); margin-top: 6px; letter-spacing: 2px; }
.stat-desc { font-size: 12px; color: var(--muted); margin-top: 4px; }

/* ---------- 通用版块 ---------- */
.section { padding: 66px 0; }
.section-gray { background: var(--green-bg); }
.section-head { text-align: center; margin-bottom: 44px; }
.section-head h2 { font-size: 32px; color: var(--ink); letter-spacing: 4px; }
.section-head p { font-size: 13px; color: var(--green); letter-spacing: 5px; margin-top: 8px; text-transform: uppercase; }
.section-head .head-desc { display: block; margin: 14px auto 0; max-width: 760px; color: var(--muted); font-size: 14px; }
.section-head::after {
  content: ""; display: block; width: 46px; height: 4px; border-radius: 2px;
  background: var(--green); margin: 16px auto 0;
}
.section-head.light h2 { color: #fff; }
.section-head.light p { color: #a5d8b5; }

/* ---------- 企业简介 ---------- */
.about-wrap { display: flex; gap: 46px; align-items: center; }
.about-pic { flex: 0 0 44%; position: relative; }
.about-pic img { border-radius: var(--radius); box-shadow: var(--shadow); width: 100%; }
.about-pic::after {
  content: ""; position: absolute; left: -18px; bottom: -18px; width: 62%; height: 62%;
  background: var(--green-soft); border-radius: var(--radius); z-index: -1;
}
.about-text h3 { font-size: 24px; color: var(--ink); margin-bottom: 16px; letter-spacing: 1px; }
.about-text p { margin-bottom: 13px; color: var(--text); text-align: justify; }
.about-tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 24px; }
.about-tags span {
  background: var(--green-soft); color: var(--green-deep); font-size: 13px;
  padding: 6px 16px; border-radius: 20px;
}
.btn-main, .btn-ghost {
  display: inline-block; padding: 11px 34px; border-radius: 26px; font-size: 15px;
  cursor: pointer; border: 1px solid var(--green); transition: all .25s;
}
.btn-main { background: var(--green); color: #fff; }
.btn-main:hover { background: var(--green-deep); border-color: var(--green-deep); }
.btn-ghost { color: var(--green); background: transparent; }
.btn-ghost:hover { background: var(--green); color: #fff; }

/* ---------- 服务（检测·治理） ---------- */
.svc-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.svc-card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 38px 32px; transition: all .3s; position: relative; overflow: hidden;
}
.svc-card::before {
  content: ""; position: absolute; left: 0; top: 0; width: 100%; height: 4px;
  background: linear-gradient(90deg, var(--green), var(--green-mid));
  transform: scaleX(0); transform-origin: left; transition: transform .3s;
}
.svc-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.svc-card:hover::before { transform: scaleX(1); }
.svc-icon {
  width: 68px; height: 68px; border-radius: 18px; background: var(--green-soft);
  display: flex; align-items: center; justify-content: center; font-size: 32px; margin-bottom: 20px;
}
.svc-card h3 { font-size: 21px; color: var(--ink); margin-bottom: 4px; }
.svc-card .en { font-size: 11px; color: var(--green); letter-spacing: 3px; text-transform: uppercase; }
.svc-card p { color: var(--muted); font-size: 14px; margin: 14px 0 20px; }
.svc-card .more { color: var(--green); font-size: 14px; }

/* ---------- 产品卡片 ---------- */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.product-card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: transform .3s, box-shadow .3s; display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.product-thumb { background: linear-gradient(160deg, #f2faf4, #e3f2e8); }
.product-thumb img { width: 100%; aspect-ratio: 319/353; object-fit: cover; }
.product-info { padding: 20px 22px 24px; text-align: center; flex: 1; display: flex; flex-direction: column; }
.product-info h3 { font-size: 18px; color: var(--ink); }
.product-sub { color: var(--green); font-size: 14px; margin: 6px 0 12px; letter-spacing: 1px; }
.product-tags { margin-bottom: 16px; flex: 1; }
.product-tags span {
  display: inline-block; font-size: 12px; color: var(--green-deep);
  border: 1px solid #bcdcc6; border-radius: 20px; padding: 2px 11px; margin: 2px 3px;
}
.btn-line {
  display: inline-block; border: 1px solid var(--green); color: var(--green);
  padding: 7px 28px; border-radius: 24px; font-size: 14px; transition: all .25s; align-self: center;
}
.product-card:hover .btn-line { background: var(--green); color: #fff; }

/* ---------- 品牌馆 ---------- */
.brand-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 34px; }
.brand-item {
  display: flex; align-items: center; gap: 16px; padding: 20px 24px;
  border: 1px dashed #bcdcc6; border-radius: var(--radius); background: var(--white); transition: all .3s;
}
.brand-item:hover { border-color: var(--green); box-shadow: var(--shadow); }
.brand-item .b-ico {
  width: 48px; height: 48px; border-radius: 50%; background: var(--green); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 20px; flex-shrink: 0;
}
.brand-item h4 { font-size: 16px; color: var(--ink); }
.brand-item p { font-size: 12px; color: var(--muted); }

/* ---------- 客户案例 ---------- */
.case-filter { display: flex; justify-content: center; gap: 12px; margin-bottom: 34px; flex-wrap: wrap; }
.case-filter a {
  padding: 8px 26px; border-radius: 22px; border: 1px solid var(--line);
  font-size: 14px; color: var(--text); background: #fff; transition: all .25s;
}
.case-filter a:hover, .case-filter a.on { background: var(--green); border-color: var(--green); color: #fff; }
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card {
  position: relative; border-radius: var(--radius); overflow: hidden; height: 250px; display: block;
}
.case-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.case-card:hover img { transform: scale(1.07); }
.case-card .mask {
  position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: flex-end;
  padding: 18px; background: linear-gradient(180deg, rgba(15,61,34,0) 42%, rgba(15,61,34,.82) 100%);
  color: #fff;
}
.case-card .mask h3 { font-size: 18px; letter-spacing: 1px; }
.case-card .mask p { font-size: 12px; opacity: .85; margin-top: 4px; }
.case-card .cat {
  position: absolute; left: 14px; top: 14px; background: var(--green); color: #fff;
  font-size: 12px; padding: 3px 12px; border-radius: 14px;
}

/* ---------- 企业历程（时间轴） ---------- */
.timeline { position: relative; max-width: 980px; margin: 0 auto; padding: 10px 0; }
.timeline::before {
  content: ""; position: absolute; left: 50%; top: 0; bottom: 0; width: 2px;
  background: var(--green-soft); transform: translateX(-50%);
}
.tl-item { position: relative; width: 50%; padding: 0 44px 38px; }
.tl-item:nth-child(odd) { left: 0; text-align: right; }
.tl-item:nth-child(even) { left: 50%; }
.tl-item::after {
  content: ""; position: absolute; top: 8px; width: 14px; height: 14px; border-radius: 50%;
  background: var(--white); border: 3px solid var(--green);
}
.tl-item:nth-child(odd)::after { right: -7px; }
.tl-item:nth-child(even)::after { left: -7px; }
.tl-year { font-size: 26px; font-weight: bold; color: var(--green); font-family: Arial, sans-serif; }
.tl-item h4 { font-size: 17px; color: var(--ink); margin: 4px 0 6px; }
.tl-item p { font-size: 13.5px; color: var(--muted); }

/* ---------- 荣誉认证 ---------- */
.cert-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.cert-item {
  display: flex; align-items: center; gap: 14px; background: var(--white);
  border: 1px solid var(--line); border-radius: 12px; padding: 18px 22px; transition: all .3s;
}
.cert-item:hover { border-color: var(--green); box-shadow: var(--shadow); }
.cert-item .ico { color: var(--green); font-size: 24px; }
.cert-item p { font-size: 14px; color: var(--text); }

/* ---------- 合作客户 ---------- */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 18px; }
.partner-item {
  background: var(--white); border: 1px solid var(--line); border-radius: 10px;
  padding: 16px; display: flex; align-items: center; justify-content: center; height: 96px;
  filter: grayscale(1); opacity: .78; transition: all .3s;
}
.partner-item:hover { filter: none; opacity: 1; box-shadow: var(--shadow); }
.partner-item img { max-height: 62px; object-fit: contain; }

/* ---------- 客户答疑 ---------- */
.faq-tabs {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 4px 8px;
  max-width: 900px; margin: 26px auto; padding: 10px 18px;
  border: 1px solid var(--line); border-radius: 12px; background: var(--white);
}
.faq-tab {
  position: relative; border: 0; background: none; cursor: pointer;
  padding: 10px 18px 12px; font-size: 15px; color: var(--muted);
  font-family: inherit; transition: color .2s;
}
.faq-tab::after {
  content: ""; position: absolute; left: 50%; bottom: 4px; transform: translateX(-50%);
  width: 0; height: 3px; border-radius: 2px; background: var(--green); transition: width .25s;
}
.faq-tab:hover { color: var(--green); }
.faq-tab.active { color: var(--green-deep); font-weight: bold; }
.faq-tab.active::after { width: 32px; }
.faq-list { max-width: 900px; margin: 0 auto; }
.faq-item.hide { display: none; }
.faq-item { border: 1px solid var(--line); border-radius: 12px; margin-bottom: 16px; background: var(--white); overflow: hidden; }
.faq-q {
  display: flex; gap: 14px; align-items: flex-start; padding: 18px 22px; cursor: pointer;
  font-size: 15.5px; color: var(--ink); font-weight: bold;
}
.faq-q .q-ico {
  flex-shrink: 0; width: 26px; height: 26px; border-radius: 50%; background: var(--green);
  color: #fff; font-size: 14px; display: flex; align-items: center; justify-content: center;
}
.faq-a { display: none; padding: 0 22px 20px 62px; color: var(--muted); font-size: 14px; }
.faq-item.open .faq-a { display: block; }
.faq-item.open .faq-q { color: var(--green-deep); }
.faq-item.open .q-ico::after { content: "−"; }
.faq-q .q-ico::after { content: "?"; }
.faq-q .q-ico { font-weight: bold; }

/* ---------- 新闻 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.news-card {
  display: flex; gap: 18px; background: var(--white); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden; padding: 14px; transition: box-shadow .3s;
}
.news-card:hover { box-shadow: var(--shadow); }
.news-pic { flex: 0 0 170px; }
.news-pic img { width: 170px; height: 118px; object-fit: cover; border-radius: 8px; background: var(--green-soft); }
.news-body h3 { font-size: 16px; color: var(--ink); margin: 6px 0; line-height: 1.5; }
.news-card:hover .news-body h3 { color: var(--green); }
.news-body p { font-size: 13px; color: var(--muted); margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-body time { font-size: 12px; color: #a3b1a8; }
.news-cat { display: inline-block; font-size: 12px; background: var(--green-soft); color: var(--green); border-radius: 3px; padding: 1px 9px; }

/* ---------- 新闻列表页 / 详情页 ---------- */
.news-list { max-width: 900px; margin: 0 auto; display: flex; flex-direction: column; gap: 18px; }
.news-row {
  display: flex; gap: 20px; background: var(--white); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 16px; transition: box-shadow .3s;
}
.news-row:hover { box-shadow: var(--shadow); }
.article {
  max-width: 900px; margin: 0 auto; background: var(--white);
  border: 1px solid var(--line); border-radius: var(--radius); padding: 40px;
}
.article-title { font-size: 26px; color: var(--ink); line-height: 1.4; }
.article-meta { margin: 14px 0 24px; display: flex; gap: 14px; align-items: center; color: #999; font-size: 13px; }
.article-pic img { border-radius: 10px; margin-bottom: 24px; max-height: 430px; object-fit: cover; width: 100%; }
.article-body p { margin-bottom: 15px; text-indent: 2em; text-align: justify; }
.article-body img { border-radius: 8px; margin: 10px auto; max-width: 100%; }
.article-nav { max-width: 900px; margin: 26px auto 0; display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; }
.article-nav a { color: var(--green-deep); font-size: 14px; }
.article-nav a:hover { color: var(--green); }

/* ---------- 内页 banner ---------- */
.page-banner {
  background-color: var(--green-deep);
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  color: #fff; text-align: center; padding: 72px 0;
  position: relative;
}
.page-banner::before { content: ""; position: absolute; inset: 0; background: rgba(15, 61, 34, .74); }
.page-banner h1, .page-banner p, .page-banner .breadcrumb { position: relative; z-index: 1; }
.page-banner h1 { font-size: 34px; letter-spacing: 6px; }
.page-banner p { margin-top: 10px; font-size: 13px; letter-spacing: 4px; color: #a5d8b5; }
.breadcrumb { text-align: center; margin-top: 18px; font-size: 13px; color: #cfe6d6; }
.breadcrumb a:hover { color: #fff; }

/* ---------- 案例详情 ---------- */
.case-detail { max-width: 960px; margin: 0 auto; }
.case-meta { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 28px; }
.case-meta div {
  background: var(--green-bg); border-radius: 10px; padding: 14px 18px; text-align: center;
}
.case-meta span { display: block; font-size: 12px; color: var(--muted); }
.case-meta strong { font-size: 16px; color: var(--green-deep); }
.case-pic img { border-radius: var(--radius); box-shadow: var(--shadow); width: 100%; margin-bottom: 26px; }

/* ---------- 服务详情页 ---------- */
.svc-detail { display: flex; gap: 40px; align-items: flex-start; margin-bottom: 50px; }
.svc-detail-pic { flex: 0 0 42%; }
.svc-detail-pic img { border-radius: var(--radius); box-shadow: var(--shadow); }
.svc-detail-body h3 { font-size: 24px; color: var(--ink); margin-bottom: 16px; }
.svc-detail-body p { margin-bottom: 12px; text-align: justify; }
.spec-table { width: 100%; border-collapse: collapse; margin: 22px 0 10px; }
.spec-table th, .spec-table td { border: 1px solid var(--line); padding: 10px 14px; font-size: 14px; text-align: center; }
.spec-table th { background: var(--green-soft); color: var(--green-deep); }
.point-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; margin-top: 18px; }
.point-grid div {
  background: var(--green-bg); border-radius: 10px; text-align: center; padding: 16px 8px; font-size: 14px;
}
.point-grid span { display: block; color: var(--green); font-weight: bold; margin-bottom: 4px; }
.svc-tab { display: flex; justify-content: center; gap: 12px; margin-bottom: 40px; }

/* ---------- 联系我们 ---------- */
.contact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; margin-bottom: 42px; }
.contact-item { text-align: center; padding: 34px 18px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); transition: all .3s; }
.contact-item:hover { border-color: var(--green); box-shadow: var(--shadow); }
.contact-item .ico { font-size: 30px; margin-bottom: 10px; }
.contact-item h3 { color: var(--ink); font-size: 17px; margin-bottom: 8px; }
.contact-item p { color: var(--muted); font-size: 14px; }
.contact-item p strong { color: var(--green); font-size: 19px; }

/* ---------- 留言表单 ---------- */
.message-wrap { display: flex; gap: 40px; max-width: 1020px; margin: 0 auto; }
.message-tips { flex: 0 0 300px; background: var(--green-bg); border-radius: var(--radius); padding: 28px; border: 1px solid var(--line); }
.message-tips h3 { color: var(--ink); margin-bottom: 14px; }
.message-tips li { position: relative; padding-left: 18px; font-size: 13px; color: var(--muted); margin-bottom: 10px; }
.message-tips li::before { content: ""; position: absolute; left: 0; top: 10px; width: 6px; height: 6px; border-radius: 50%; background: var(--green); }
.tips-contact { margin-top: 22px; padding-top: 18px; border-top: 1px dashed #bcdcc6; }
.tips-contact strong { color: var(--green); font-size: 19px; }
.message-form { flex: 1; }
.message-form label { display: block; margin-bottom: 18px; }
.message-form label span { display: block; margin-bottom: 8px; font-size: 14px; color: var(--ink); }
.message-form em { color: #d0342c; font-style: normal; }
.message-form input, .message-form textarea, .message-form select {
  width: 100%; border: 1px solid var(--line); border-radius: 8px; padding: 11px 14px;
  font-size: 14px; font-family: inherit; outline: none; transition: border .25s; resize: vertical; background: #fff;
}
.message-form input:focus, .message-form textarea:focus { border-color: var(--green); }
.form-msg { padding: 12px 16px; border-radius: 8px; margin-bottom: 18px; font-size: 14px; }
.form-msg.error { background: #fdecea; color: #c0392b; border: 1px solid #f5c6cb; }
.form-msg.success { background: #e9f7ef; color: #1e7e34; border: 1px solid #bee5c8; }

/* ---------- CTA 条 ---------- */
.cta-band {
  background: linear-gradient(115deg, var(--green-deep), var(--green) 90%);
  color: #fff; padding: 52px 0; text-align: center;
}
.cta-band h2 { font-size: 28px; letter-spacing: 3px; margin-bottom: 8px; }
.cta-band p { opacity: .9; margin-bottom: 22px; }
.cta-band .btn-white {
  display: inline-block; background: #fff; color: var(--green-deep); padding: 12px 40px;
  border-radius: 26px; font-size: 15px; font-weight: bold; transition: all .25s;
}
.cta-band .btn-white:hover { transform: translateY(-3px); box-shadow: 0 10px 22px rgba(0,0,0,.2); }
.cta-band .tel { font-size: 24px; font-weight: bold; margin-left: 18px; vertical-align: middle; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--green-dark); color: #b9d4c2; margin-top: 70px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.3fr; gap: 30px; padding: 52px 20px 38px; }
.footer-logo { color: #fff; font-size: 24px; letter-spacing: 3px; margin-bottom: 6px; }
.footer-logo em { font-style: normal; font-size: 12px; color: #7fbf95; letter-spacing: 4px; margin-left: 8px; }
.footer-slogan { color: #8fc7a2; font-size: 13px; letter-spacing: 2px; margin-bottom: 14px; }
.footer-col p { font-size: 13px; line-height: 1.9; }
.footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 16px; letter-spacing: 2px; }
.footer-links li, .footer-contact li { font-size: 13px; margin-bottom: 9px; }
.footer-links a:hover { color: #fff; }
.footer-contact strong { color: #fff; font-size: 15px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding: 16px 0; text-align: center; font-size: 12px; color: #7fa98c; }
.footer-bottom a { color: #7fa98c; }
.footer-bottom a:hover { color: #fff; }

/* ---------- 回到顶部 ---------- */
.back-top {
  position: fixed; right: 26px; bottom: 30px; width: 46px; height: 46px; border-radius: 50%;
  background: var(--green); color: #fff; border: none; font-size: 20px; cursor: pointer;
  opacity: 0; pointer-events: none; transition: all .3s; z-index: 90; box-shadow: var(--shadow);
}
.back-top.show { opacity: 1; pointer-events: auto; }
.back-top:hover { background: var(--green-deep); }

/* ---------- 滚动进入动画（仅当 html.anim 时启用） ---------- */
html.anim .reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
html.anim .reveal.in { opacity: 1; transform: none; }
html:not(.anim) .slide, html:not(.anim) .reveal, html:not(.anim) .stat-num { transition: none !important; }

/* 尊重系统"减少动态效果"设置 */
@media (prefers-reduced-motion: reduce) {
  html .reveal, html .slide, html .stat-num { transition: none !important; }
  html .reveal { opacity: 1 !important; transform: none !important; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
  .slider { height: 380px; }
  .slide-caption { font-size: 20px; left: 5%; padding: 16px 24px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 26px; }
  .stat-item + .stat-item::before { display: none; }
  .product-grid, .case-grid, .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .partner-grid { grid-template-columns: repeat(3, 1fr); }
  .brand-strip { grid-template-columns: 1fr; }
  .svc-grid, .news-grid { grid-template-columns: 1fr; }
  .about-wrap, .svc-detail, .message-wrap { flex-direction: column; }
  .about-pic, .svc-detail-pic { flex: none; width: 100%; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .point-grid { grid-template-columns: repeat(2, 1fr); }
  .case-meta { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .header-inner { flex-wrap: wrap; }
  .nav-toggle { display: block; order: 3; }
  .main-nav { display: none; width: 100%; order: 4; }
  .main-nav.open { display: block; }
  .main-nav ul { flex-wrap: wrap; }
  .main-nav a { padding: 10px 14px; }
  /* 时间轴改单侧 */
  .timeline::before { left: 10px; }
  .tl-item { width: 100%; left: 0 !important; text-align: left !important; padding: 0 0 30px 38px; }
  .tl-item::after { left: 3px !important; right: auto !important; }
}
@media (max-width: 576px) {
  .slider { height: 280px; }
  .product-grid, .case-grid, .cert-grid, .news-grid, .contact-grid { grid-template-columns: 1fr; }
  .partner-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .topbar-inner span:first-child { display: none; }
  .section { padding: 46px 0; }
  .article { padding: 24px 18px; }
  .stat-num { font-size: 36px; }
}

/* ---------- 新闻富文本正文：插图与链接 ---------- */
.article-body img { max-width: 100%; height: auto; border-radius: 4px; margin: 10px 0; }
.article-body a { color: var(--green); text-decoration: underline; }
.article-body a:hover { color: var(--green-deep); }
.article-body table { border-collapse: collapse; width: 100%; margin: 10px 0; }
.article-body td, .article-body th { border: 1px solid #d8dee4; padding: 6px 10px; }

/* ---------- SEO/GEO 改造新增样式 ---------- */
/* 视觉隐藏但可被搜索引擎/读屏器读取（不用 display:none） */
.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
/* 产品页首屏导语 */
.seo-lead { max-width: 900px; margin: 0 auto 26px; font-size: 16px; line-height: 1.9; color: #33413c; background: #f2f8f4; border-left: 4px solid var(--green); padding: 16px 20px; border-radius: 0 8px 8px 0; }
/* 产品参数表 */
.spec-table { width: 100%; max-width: 900px; margin: 0 auto 40px; border-collapse: collapse; font-size: 14.5px; background: #fff; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.spec-table th, .spec-table td { border-bottom: 1px solid #edf2f0; padding: 11px 18px; text-align: left; vertical-align: top; }
.spec-table th { width: 220px; background: #f7faf8; color: #3c4a44; font-weight: 600; white-space: nowrap; }
.spec-table tr:last-child th, .spec-table tr:last-child td { border-bottom: none; }
/* 新闻详情页栏目名降级为面包屑链接（不再占用 h1） */
.page-crumb { font-size: 15px; letter-spacing: 2px; }
.page-crumb a { color: #fff; text-decoration: none; }
.page-crumb a:hover { color: var(--green-light, #a5d8b5); text-decoration: underline; }