/* ================= 华亿净化 · 设计系统 ================= */
:root {
  --brand: #1b60c8;
  --brand-2: #65b73b;
  --brand-dark: #10356e;
  --grad: linear-gradient(135deg, #1554ad 0%, #2f7dd1 100%);
  --ink: #17233a;
  --ink-2: #52627a;
  --line: #dce8f6;
  --bg-soft: #f1f6fd;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(27, 96, 200, .10);
  --wrap: 1380px;
}

html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  font-size: 16px;
  line-height: 1.75;
}
a { text-decoration: none; color: inherit; }
.wrap { width: min(100% - 32px, var(--wrap)); margin-inline: auto; }
@media (min-width: 1400px) { .wrap { width: var(--wrap); } }

/* ---------- 顶部条 ---------- */
.topbar { background: var(--brand-dark); color: rgba(255,255,255,.85); }
.topbar a { color: #bcd3f0; }
.topbar a:hover { color: #fff; }
.topbar > .wrap { min-height: 36px; }

/* ---------- 导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 1030;
  background: #fff; box-shadow: 0 2px 14px rgba(0,0,0,.06);
}
.site-header .wrap { display: flex; align-items: stretch; }
.navbar-brand { padding: 14px 0; }
.brand-logo { height: 43px; width: auto; flex: none; }
.brand-mark {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  background: var(--grad); color: #fff; font-size: 22px; flex: none;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; border-left: 1px solid rgba(16, 53, 110, .15); padding-left: 12px; }
.brand-text b { font-size: 21px; letter-spacing: 1px; color: var(--brand-dark); }
.brand-text small { font-size: 12px; color: var(--ink-2); }
.ft-logo { background: #fff; border-radius: 10px; padding: 5px 10px; display: inline-flex; align-items: center; flex: none; }
.ft-logo img { height: 38px; width: auto; }
.main-nav { gap: 6px; align-items: stretch; }
.main-nav > li { position: relative; display: flex; align-items: center; }
.main-nav > li > a {
  padding: 10px 16px; font-size: 16.5px; font-weight: 500; color: var(--ink);
  border-radius: 8px; transition: .2s; white-space: nowrap;
}
.main-nav > li > a:hover, .main-nav > li > a.active { color: var(--brand); background: var(--bg-soft); }
.main-nav > li > a.active::after {
  content: ""; display: block; position: absolute; left: 16px; right: 16px; bottom: 4px;
  height: 3px; border-radius: 3px; background: var(--grad);
}
@media (max-width: 991.98px) {
  .main-nav { flex-direction: column; width: 100%; padding-bottom: 12px; }
  .main-nav > li { flex-direction: column; align-items: stretch; }
  .site-header .wrap { flex-wrap: wrap; }
}

/* ---------- 首页 Hero ---------- */
.hero {
  position: relative; color: #fff; overflow: hidden;
  background:
    radial-gradient(900px 400px at 85% 10%, rgba(101,183,59,.35), transparent 60%),
    radial-gradient(700px 500px at 10% 90%, rgba(255,255,255,.08), transparent 55%),
    linear-gradient(120deg, #0a1f3f 0%, #1554ad 55%, #2f7dd1 100%);
}
.hero .wrap { position: relative; z-index: 2; padding: 88px 0 96px; display: grid;
  grid-template-columns: minmax(0,1.15fr) minmax(0,.85fr); gap: 40px; align-items: center; }
.hero h1 { font-size: clamp(30px, 3.6vw, 52px); font-weight: 800; line-height: 1.28; margin: 0 0 18px; }
.hero h1 .em { background: linear-gradient(90deg,#a8d4ff,#93e06a); -webkit-background-clip: text;
  background-clip: text; color: transparent; }
.hero .lead-txt { font-size: 18px; color: rgba(255,255,255,.82); max-width: 620px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 30px; }
.hero-tags span {
  border: 1px solid rgba(255,255,255,.35); background: rgba(255,255,255,.08);
  padding: 6px 16px; border-radius: 999px; font-size: 14.5px; backdrop-filter: blur(4px);
}
.btn-hero { background: #fff; color: var(--brand-dark); font-weight: 700; border-radius: 999px;
  padding: 13px 34px; }
.btn-hero:hover { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(0,0,0,.25); }
.btn-hero-ghost { border: 1.5px solid rgba(255,255,255,.65); color: #fff; border-radius: 999px;
  padding: 13px 30px; font-weight: 600; }
.btn-hero-ghost:hover { background: rgba(255,255,255,.12); }
.hero-phone { margin-top: 30px; display: flex; align-items: baseline; gap: 12px; }
.hero-phone i { font-size: 26px; }
.hero-phone b { font-size: clamp(24px,2.6vw,34px); letter-spacing: 1px; }
.hero-art { position: relative; }
.hero-art .ring { border: 1.5px dashed rgba(255,255,255,.35); border-radius: 50%;
  aspect-ratio: 1; display: grid; place-items: center; animation: spin 40s linear infinite; }
.hero-art .core { width: 62%; aspect-ratio: 1; border-radius: 50%; display: grid; place-items: center;
  background: radial-gradient(circle at 30% 25%, rgba(160,200,240,.4), rgba(27,96,200,.65));
  border: 1px solid rgba(255,255,255,.35); box-shadow: inset 0 0 60px rgba(6, 25, 55, .5);
  font-size: clamp(60px, 8vw, 110px); animation: spin 40s linear infinite reverse; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (max-width: 991.98px) { .hero .wrap { grid-template-columns: 1fr; padding: 60px 0; } .hero-art { display: none; } }

/* ---------- 数字条 ---------- */
.stat-strip { background: #fff; border-bottom: 1px solid var(--line); }
.stat-strip .wrap { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; padding: 34px 0; }
.stat-cell { text-align: center; }
.stat-cell b { font-size: clamp(26px, 2.6vw, 40px); color: var(--brand); font-weight: 800; }
.stat-cell b small { font-size: 16px; margin-left: 2px; }
.stat-cell span { color: var(--ink-2); font-size: 15px; }
@media (max-width: 767.98px) { .stat-strip .wrap { grid-template-columns: repeat(2,1fr); } }

/* ---------- 区块标题 ---------- */
.section { padding: 72px 0; }
.section.soft { background: var(--bg-soft); }
.sec-head { text-align: center; margin-bottom: 44px; }
.sec-head .en { color: var(--brand-2); font-weight: 700; letter-spacing: 3px; text-transform: uppercase; font-size: 13px; }
.sec-head h2 { font-size: clamp(24px, 2.4vw, 34px); font-weight: 800; margin: 6px 0 10px; }
.sec-head p { color: var(--ink-2); max-width: 800px; margin: 0 auto; }
.sec-head .bar { width: 56px; height: 4px; border-radius: 4px; background: var(--grad); margin: 14px auto 0; }

/* ---------- 卡片 ---------- */
.card-x {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: .25s; height: 100%; display: flex; flex-direction: column;
}
.card-x:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: #bcd6ea; }
.card-x .thumb { aspect-ratio: 16/10; background: linear-gradient(135deg,#e8f2fb,#f2fbfc); overflow: hidden; }
.card-x .thumb img { width: 100%; height: 100%; object-fit: cover; transition: .5s; }
.card-x:hover .thumb img { transform: scale(1.06); }
.card-x .bd { padding: 18px 20px 20px; flex: 1; display: flex; flex-direction: column; }
.card-x h3 { font-size: 17.5px; font-weight: 700; margin: 0 0 8px; }
.card-x h3 a:hover { color: var(--brand); }
.card-x .desc { color: var(--ink-2); font-size: 14px; flex: 1;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-x .meta { display: flex; justify-content: space-between; align-items: center; margin-top: 14px;
  color: #93a3b1; font-size: 13px; }
.card-x .more { color: var(--brand); font-size: 14px; font-weight: 600; }

/* 分类宫格 */
.cat-cell {
  display: flex; flex-direction: column; align-items: center; gap: 12px; text-align: center;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 16px; transition: .25s; height: 100%;
}
.cat-cell:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent;
  background: var(--grad); color: #fff; }
.cat-cell:hover .cat-ico { background: rgba(255,255,255,.18); color: #fff; }
.cat-cell:hover p { color: rgba(255,255,255,.85); }
.cat-ico { width: 66px; height: 66px; border-radius: 18px; display: grid; place-items: center;
  font-size: 30px; background: var(--bg-soft); color: var(--brand); transition: .25s; }
.cat-cell b { font-size: 17px; }
.cat-cell p { font-size: 13px; color: var(--ink-2); margin: 0; }

/* 新闻列表行 */
.news-row { display: flex; gap: 18px; padding: 18px 0; border-bottom: 1px dashed var(--line); }
.news-row:last-child { border-bottom: 0; }
.news-row .date { flex: none; width: 74px; text-align: center; border-radius: 10px;
  background: var(--bg-soft); color: var(--brand); padding: 8px 0; }
.news-row .date b { display: block; font-size: 22px; line-height: 1.1; }
.news-row h4 { font-size: 16.5px; margin: 0 0 6px; font-weight: 600; }
.news-row h4:hover { color: var(--brand); }
.news-row p { color: var(--ink-2); font-size: 14px; margin: 0; }

/* ---------- 内页横幅 ---------- */
.page-banner {
  background:
    radial-gradient(600px 300px at 90% 0%, rgba(101,183,59,.4), transparent 60%),
    linear-gradient(115deg, #0a1f3f, #1554ad 70%, #2f7dd1);
  color: #fff; padding: 52px 0;
}
.page-banner h1 { font-size: clamp(24px, 2.6vw, 36px); font-weight: 800; margin: 0; }
.page-banner .crumb { font-size: 14px; color: rgba(255,255,255,.75); margin-top: 8px; }
.page-banner .crumb a { color: #bcd3f0; }

/* ---------- 侧栏 ---------- */
.side-box { background: var(--bg-soft); border-radius: var(--radius); padding: 22px; margin-bottom: 22px; }
.side-box h5 { font-size: 17px; font-weight: 800; border-left: 4px solid var(--brand); padding-left: 10px; margin-bottom: 14px; }
.side-contact { background: var(--grad); color: #fff; border-radius: var(--radius); padding: 24px; }
.side-contact h5 { color: #fff; border: none; padding: 0; }
.side-contact .tel { font-size: 22px; font-weight: 800; }
.side-contact a { color: #fff; }
.side-contact a.btn { color: var(--bs-btn-color); }

/* ---------- 富文本正文 ---------- */
.rich-content { font-size: 16px; color: #2c3a47; }
.rich-content img { max-width: 100%; height: auto; border-radius: 10px; margin: 10px 0; }
.rich-content p { margin-bottom: 14px; }
.rich-content h2, .rich-content h3 { font-weight: 700; margin: 26px 0 12px; color: var(--brand-dark); }
.rich-content table { width: 100%; border-collapse: collapse; margin: 16px 0; }
.rich-content td, .rich-content th { border: 1px solid var(--line); padding: 8px 12px; }
.rich-content ul, .rich-content ol { padding-left: 24px; }

/* ---------- 详情页 ---------- */
.article-head { border-bottom: 1px solid var(--line); padding-bottom: 18px; margin-bottom: 24px; }
.article-head h1 { font-size: clamp(21px, 2vw, 28px); font-weight: 800; }
.article-meta { color: #93a3b1; font-size: 14px; display: flex; flex-wrap: wrap; gap: 18px; margin-top: 10px; }
.prevnext { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; }
.prevnext a { flex: 1 1 300px; border: 1px solid var(--line); border-radius: 10px; padding: 12px 16px;
  color: var(--ink-2); transition: .2s; }
.prevnext a:hover { border-color: var(--brand); color: var(--brand); }

/* ---------- CTA 条 ---------- */
.cta-band { background: var(--grad); color: #fff; border-radius: 18px; padding: 40px 44px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.cta-band h3 { margin: 0 0 6px; font-size: 24px; font-weight: 800; }
.cta-band p { margin: 0; opacity: .85; }
.btn-cta { background: #fff; color: var(--brand); font-weight: 700; border-radius: 999px; padding: 12px 32px; }
.btn-cta:hover { transform: translateY(-2px); box-shadow: 0 10px 22px rgba(0,0,0,.2); }

/* ---------- 留言表单 ---------- */
.msg-form { scroll-margin-top: 96px; }
.msg-form .form-control, .msg-form .form-select {
  border-radius: 10px; border-color: var(--line); padding: 12px 14px; }
.msg-form .form-control:focus { border-color: var(--brand-2); box-shadow: 0 0 0 .2rem rgba(27,96,200,.18); }
.hp-field { position: absolute !important; left: -9999px; opacity: 0; height: 0; }

/* ---------- 页脚 ---------- */
.site-footer { background: #0b1e3a; color: #b7c7dd; font-size: 14.5px; }
.site-footer h6 { color: #fff; font-weight: 700; margin-bottom: 16px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer ul li { margin-bottom: 10px; }
.site-footer a:hover { color: #8fd45e; }
.ft-desc { color: #97aac6; }
.ft-badge { border: 1px solid rgba(255,255,255,.18); color: #b9c8de; border-radius: 999px;
  padding: 4px 12px; font-size: 12.5px; }
.ft-contact li { display: flex; gap: 10px; align-items: flex-start; }
.ft-contact i { color: var(--brand-2); margin-top: 4px; }
.ft-copy { border-top: 1px solid rgba(255,255,255,.08); padding: 18px 0 26px; font-size: 13px; color: #7e91ab; }

/* ---------- 悬浮工具 ---------- */
.float-tools { position: fixed; right: 18px; bottom: 90px; z-index: 1040; display: flex;
  flex-direction: column; gap: 10px; }
.ftool { width: 52px; height: 52px; border-radius: 12px; background: #fff; box-shadow: 0 6px 20px rgba(0,0,0,.12);
  display: grid; place-items: center; color: var(--brand); font-size: 20px; text-align: center;
  border: 1px solid var(--line); transition: .2s; }
.ftool span { font-size: 11px; line-height: 1; }
.ftool:hover { background: var(--grad); color: #fff; transform: translateY(-3px); }
@media (max-width: 767.98px) { .float-tools { bottom: 24px; right: 10px; } .ftool { width: 44px; height: 44px; font-size: 17px; } }
/* 移动端底部快捷条 */
.mobile-callbar { display: none; position: fixed; left: 0; right: 0; bottom: 0; z-index: 1035;
  background: var(--grad); }
.mobile-callbar a { flex: 1; color: #fff; text-align: center; padding: 13px 0; font-weight: 600; }
@media (max-width: 991.98px) { .mobile-callbar { display: flex; } body { padding-bottom: 52px; } }

/* ---------- 分页 ---------- */
.pagination { --bs-pagination-color: var(--brand); --bs-pagination-active-bg: var(--brand);
  --bs-pagination-active-border-color: var(--brand); --bs-pagination-border-radius: 8px; }

/* ---------- 动效 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: .7s cubic-bezier(.2,.7,.3,1); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Bootstrap 主色覆盖（跟随品牌蓝） ---------- */
.btn-primary { --bs-btn-bg: var(--brand); --bs-btn-border-color: var(--brand);
  --bs-btn-hover-bg: #1554ad; --bs-btn-hover-border-color: #1554ad;
  --bs-btn-active-bg: #12468f; --bs-btn-active-border-color: #12468f;
  --bs-btn-focus-shadow-rgb: 27, 96, 200; }
.btn-outline-primary { --bs-btn-color: var(--brand); --bs-btn-border-color: var(--brand);
  --bs-btn-hover-bg: var(--brand); --bs-btn-hover-border-color: var(--brand);
  --bs-btn-active-bg: #1554ad; --bs-btn-active-border-color: #1554ad;
  --bs-btn-focus-shadow-rgb: 27, 96, 200; }
.text-primary { color: var(--brand) !important; }

/* ---------- 介绍页关联文章 ---------- */
.pa-title { font-size: 20px; font-weight: 800; color: var(--brand-dark);
  border-left: 4px solid var(--brand); padding-left: 12px; margin-bottom: 18px; }
.pa-item { display: flex; align-items: center; gap: 8px; background: var(--bg-soft);
  border: 1px solid var(--line); border-radius: 10px; padding: 13px 16px; color: var(--ink);
  transition: .2s; height: 100%; }
.pa-item i { color: var(--brand); flex: none; }
.pa-item span { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 15px; }
.pa-item:hover { background: #fff; border-color: var(--brand-2); box-shadow: var(--shadow); color: var(--brand); transform: translateY(-2px); }

/* ---------- 首页行业资讯双栏 ---------- */
.nk-box { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; height: 100%; }
.nk-head { font-size: 17px; font-weight: 800; color: var(--brand-dark); padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.nk-head i { color: var(--brand); margin-right: 6px; }
.nk-box .news-row { padding: 14px 0; }
.nk-box .pa-item { padding: 10px 12px; margin-top: 9px; height: auto; }
.nk-foot { text-align: right; padding-top: 14px; }
.nk-foot a { color: var(--brand); font-size: 14px; }
.nk-foot a:hover { text-decoration: underline; }

/* ---------- 客户墙 ---------- */
.cust-wall { display: flex; flex-wrap: wrap; gap: 12px; }
.cust-cell { flex: 0 0 calc(20% - 9.6px); box-sizing: border-box; min-height: 54px; display: flex; align-items: center; justify-content: center; text-align: center; padding: 9px 10px; background: #fff; border: 1px solid var(--line); border-radius: 10px; font-size: 13.5px; color: var(--ink); line-height: 1.45; transition: .25s; }
.cust-cell:hover { border-color: var(--brand-2); color: var(--brand); box-shadow: var(--shadow); transform: translateY(-3px); }
.cust-cell-cta { background: var(--grad); color: #fff; border: 0; font-weight: 600; }
.cust-cell-cta:hover { color: #fff; }
.cust-cell-tel { border-color: var(--brand-2); color: var(--brand); font-weight: 700; }
@media (max-width: 1199.98px) { .cust-cell { flex-basis: calc(25% - 9px); } }
@media (max-width: 767.98px) { .cust-cell { flex-basis: calc(50% - 6px); min-height: 46px; font-size: 12.5px; } }

/* ---------- 联系我们页 ---------- */
.ct-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px; height: 100%; transition: .25s; }
.ct-card:hover { border-color: var(--brand-2); box-shadow: var(--shadow); transform: translateY(-4px); }
.ct-card .lbl { font-size: 13.5px; color: var(--ink-2); margin-bottom: 8px; }
.ct-card .lbl i { color: var(--brand); margin-right: 6px; }
.ct-card .val { font-size: 21px; font-weight: 800; color: var(--brand-dark); line-height: 1.35; display: block; word-break: break-all; }
.ct-card a.val:hover { color: var(--brand); }
.ct-card .val.sm { font-size: 16px; }
.ct-card .sub { font-size: 12.5px; color: var(--ink-2); margin-top: 6px; }
.ct-card.ct-main { background: var(--grad); border: 0; color: #fff; }
.ct-card.ct-main .lbl, .ct-card.ct-main .sub { color: rgba(255,255,255,.8); }
.ct-card.ct-main .lbl i { color: #fff; }
.ct-card.ct-main .val, .ct-card.ct-main a.val { color: #fff; }
.ct-scope { margin-top: 34px; background: var(--bg-soft); border: 1px dashed var(--brand-2); border-radius: var(--radius); padding: 18px 22px; display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.ct-scope b { color: var(--brand-dark); margin-right: 4px; }
.ct-scope span { background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 4px 14px; font-size: 13.5px; color: var(--brand); }
.ct-scope em { flex: 1 1 260px; font-style: normal; text-align: right; color: var(--ink-2); font-size: 13px; }
@media (max-width: 767.98px) { .ct-scope em { text-align: left; } .ct-card .val { font-size: 18px; } }

/* ---------- 关于我们 ---------- */
.about-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 34px; box-shadow: var(--shadow); height: 100%; }
.about-h { font-size: 20px; font-weight: 800; margin: 0 0 14px; color: var(--brand-dark);
  padding-left: 12px; border-left: 4px solid var(--brand-2); }
.about-info { background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 26px; box-shadow: var(--shadow); }
.about-info h3 { font-size: 18px; font-weight: 800; margin: 0 0 14px; color: var(--brand-dark); }
.about-info ul { list-style: none; padding: 0; margin: 0; }
.about-info li { display: flex; gap: 12px; padding: 11px 0; border-bottom: 1px dashed var(--line); font-size: 15px; }
.about-info li:last-child { border-bottom: 0; }
.about-info li span { color: var(--ink-2); flex: none; width: 72px; }
.about-info li b { font-weight: 600; color: var(--ink); }
.about-tel { margin-top: 16px; background: var(--grad); color: #fff; border-radius: var(--radius);
  padding: 22px 26px; box-shadow: var(--shadow); }
.about-tel .lbl { font-size: 14px; opacity: .85; }
.about-tel a { display: block; margin-top: 6px; color: #fff; font-size: 26px; font-weight: 800; letter-spacing: .5px; }
.about-tel .sub { margin-top: 8px; font-size: 13px; opacity: .85; }
.about-block { margin-top: 56px; }
.about-block .sec-head { margin-bottom: 30px; }
.ab-biz { display: block; height: 100%; background: #fff; border: 1px solid var(--line);
  border-radius: 14px; padding: 26px 22px; box-shadow: var(--shadow); transition: .25s; color: var(--ink); }
.ab-biz i { font-size: 28px; color: var(--brand); }
.ab-biz b { display: block; margin: 12px 0 6px; font-size: 17px; font-weight: 700; }
.ab-biz span { font-size: 13.5px; color: var(--ink-2); line-height: 1.6; }
.ab-biz:hover { transform: translateY(-4px); border-color: var(--brand-2); color: var(--brand); }
.stat-strip.inner { background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); margin-bottom: 26px; }
.ab-flow { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
.ab-flow .step { position: relative; background: #fff; border: 1px solid var(--line); border-radius: 14px;
  padding: 22px 14px 18px; text-align: center; box-shadow: var(--shadow); }
.ab-flow .step b { position: absolute; top: 8px; left: 10px; font-size: 12px; color: var(--brand-2); font-weight: 800; }
.ab-flow .step i { display: block; font-size: 24px; color: var(--brand); margin-bottom: 8px; }
.ab-flow .step span { font-size: 14.5px; font-weight: 600; }
@media (max-width: 991.98px) { .ab-flow { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 575.98px) { .ab-flow { grid-template-columns: repeat(2, 1fr); } }
.ab-why { height: 100%; background: var(--bg-soft); border: 1px solid var(--line); border-radius: 14px; padding: 22px; }
.ab-why i { font-size: 22px; color: var(--brand); }
.ab-why b { display: block; margin: 10px 0 6px; font-size: 16px; font-weight: 700; }
.ab-why span { font-size: 13.5px; color: var(--ink-2); line-height: 1.7; }
.ab-cert { display: flex; justify-content: center; }
.cert-card { display: block; max-width: 560px; width: 100%; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); transition: .25s; }
.cert-card img { width: 100%; border-radius: 10px; border: 1px solid var(--line); }
.cert-card .cap { text-align: center; margin-top: 14px; }
.cert-card .cap b { display: block; font-size: 17px; color: var(--brand-dark); margin-bottom: 4px; }
.cert-card .cap span { font-size: 13px; color: var(--ink-2); }
.cert-card:hover { transform: translateY(-4px); box-shadow: 0 14px 30px rgba(16,53,110,.14); border-color: var(--brand-2); }

/* ---------- 列表页顶部分类横条 ---------- */
.cat-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.cat-bar a { padding: 9px 24px; border-radius: 999px; border: 1px solid var(--line);
  background: #fff; color: var(--ink); font-size: 15px; font-weight: 500; transition: .2s; }
.cat-bar a:hover { border-color: var(--brand-2); color: var(--brand); transform: translateY(-1px); }
.cat-bar a.on { background: var(--grad); color: #fff; border-color: transparent;
  box-shadow: 0 4px 12px rgba(21,84,173,.28); }