/* ============ 致可智能 ZHIKE ROBOTICS - 全站样式 ============ */
:root {
  --c-primary: #0a5cff;
  --c-primary-dark: #0846c9;
  --c-dark: #0b0f1a;
  --c-dark-2: #111827;
  --c-text: #1a2230;
  --c-text-2: #5b6472;
  --c-line: #e6e9ef;
  --c-bg-soft: #f5f7fa;
  --radius: 14px;
  --shadow: 0 12px 40px rgba(10, 20, 50, .10);
  --maxw: 1200px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--c-text);
  background: #fff;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,.86);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--c-line);
  transition: .3s;
}
.site-header.scrolled { box-shadow: 0 4px 20px rgba(0,0,0,.06); }
.nav-wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; height: 64px; display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 19px; letter-spacing: 1px; }
.logo-mark { width: 34px; height: 34px; flex: none; }
.logo .en { font-size: 11px; color: var(--c-text-2); letter-spacing: 2.5px; display: block; line-height: 1.1; font-weight: 500; }
.main-nav ul { display: flex; gap: 6px; }
.main-nav a {
  display: block; padding: 8px 16px; font-size: 15px; color: var(--c-text);
  border-radius: 8px; transition: .2s; position: relative;
}
.main-nav a:hover, .main-nav a.active { color: var(--c-primary); background: rgba(10,92,255,.06); }
.nav-cta {
  background: var(--c-primary); color: #fff !important; padding: 9px 22px !important;
  border-radius: 999px !important; font-weight: 600;
}
.nav-cta:hover { background: var(--c-primary-dark) !important; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; width: 40px; height: 40px; position: relative; }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 8px; width: 24px; height: 2px; background: var(--c-text); transition: .3s;
}
.nav-toggle span { top: 19px; }
.nav-toggle span::before { top: -7px; left: 0; }
.nav-toggle span::after { top: 7px; left: 0; }

/* ---------- Hero ---------- */
.hero {
  position: relative; min-height: 92vh; display: flex; align-items: center;
  color: #fff; overflow: hidden; background: var(--c-dark);
}
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; opacity: .55; }
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(6,10,24,.92) 0%, rgba(6,10,24,.55) 45%, rgba(6,10,24,.15) 100%);
}
.hero-inner { position: relative; z-index: 2; max-width: var(--maxw); margin: 0 auto; padding: 140px 24px 100px; width: 100%; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px; font-size: 13px; letter-spacing: 3px;
  color: #7fb0ff; border: 1px solid rgba(127,176,255,.4); padding: 6px 16px; border-radius: 999px; margin-bottom: 28px;
}
.hero h1 { font-size: clamp(34px, 5.2vw, 62px); line-height: 1.25; font-weight: 700; letter-spacing: 1px; }
.hero h1 .grad {
  background: linear-gradient(90deg, #4d8dff, #7fb0ff);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.sub { margin: 22px 0 40px; font-size: clamp(15px, 1.6vw, 18px); color: #b8c2d4; max-width: 560px; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 13px 34px; border-radius: 999px;
  font-size: 15px; font-weight: 600; transition: .25s; cursor: pointer; border: none;
}
.btn-primary { background: var(--c-primary); color: #fff; }
.btn-primary:hover { background: #2b76ff; transform: translateY(-2px); box-shadow: 0 10px 26px rgba(10,92,255,.4); }
.btn-ghost { border: 1px solid rgba(255,255,255,.45); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.12); }
.btn-dark { background: var(--c-dark); color: #fff; }
.btn-dark:hover { background: #232c3f; }
.btn-outline { border: 1.5px solid var(--c-primary); color: var(--c-primary); background: #fff; }
.btn-outline:hover { background: rgba(10,92,255,.07); }
.hero-stats { display: flex; gap: clamp(24px, 5vw, 64px); margin-top: 64px; flex-wrap: wrap; }
.hero-stats .num { font-size: clamp(26px, 3vw, 38px); font-weight: 700; font-family: Georgia, serif; }
.hero-stats .num i { font-style: normal; color: #7fb0ff; }
.hero-stats .lbl { font-size: 13px; color: #93a1b8; letter-spacing: 1px; }

/* ---------- 通用 Section ---------- */
.section { padding: 96px 0; }
.section.tight { padding: 72px 0; }
.section.dark { background: var(--c-dark); color: #fff; }
.section.soft { background: var(--c-bg-soft); }
.sec-head { text-align: center; max-width: 760px; margin: 0 auto 56px; }
.sec-head.left { text-align: left; margin-left: 0; }
.sec-kicker { font-size: 13px; letter-spacing: 4px; color: var(--c-primary); font-weight: 600; text-transform: uppercase; }
.section.dark .sec-kicker { color: #7fb0ff; }
.sec-head h2 { font-size: clamp(26px, 3.4vw, 40px); margin: 12px 0 14px; font-weight: 700; }
.sec-head p { color: var(--c-text-2); font-size: 16px; }
.section.dark .sec-head p { color: #9aa7bd; }

/* ---------- 产品卡片 ---------- */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.product-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  overflow: hidden; transition: .3s; display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.product-card .pic { aspect-ratio: 4/3; overflow: hidden; background: #0d1424; }
.product-card .pic img { width: 100%; height: 100%; object-fit: cover; transition: .6s; }
.product-card:hover .pic img { transform: scale(1.06); }
.product-card .body { padding: 26px; flex: 1; display: flex; flex-direction: column; }
.product-card h3 { font-size: 20px; margin-bottom: 4px; }
.product-card .en-name { font-size: 12px; letter-spacing: 2px; color: var(--c-text-2); margin-bottom: 12px; }
.product-card p { font-size: 14px; color: var(--c-text-2); flex: 1; }
.product-card .tags { display: flex; gap: 8px; flex-wrap: wrap; margin: 16px 0 14px; }
.tag { font-size: 12px; padding: 4px 12px; border-radius: 999px; background: rgba(10,92,255,.08); color: var(--c-primary); }
.product-card .more { color: var(--c-primary); font-weight: 600; font-size: 14px; }
.product-card .more:hover { text-decoration: underline; }
.center-cta { text-align: center; margin-top: 48px; }

/* ---------- 行业应用 ---------- */
.industry-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.industry-card {
  position: relative; border-radius: var(--radius); overflow: hidden; min-height: 300px;
  display: flex; align-items: flex-end; color: #fff; isolation: isolate;
}
.industry-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: .6s; z-index: -2; }
.industry-card::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(180deg, rgba(8,12,24,.05) 30%, rgba(8,12,24,.85) 100%);
}
.industry-card:hover img { transform: scale(1.07); }
.industry-card .body { padding: 26px; width: 100%; }
.industry-card .icon { width: 42px; height: 42px; margin-bottom: 14px; }
.industry-card .icon svg { width: 100%; height: 100%; }
.industry-card h3 { font-size: 19px; margin-bottom: 6px; }
.industry-card p { font-size: 13px; color: #ccd4e2; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.industry-card .arrow { position: absolute; top: 22px; right: 22px; width: 34px; height: 34px; border-radius: 50%; background: rgba(255,255,255,.18); backdrop-filter: blur(6px); display: flex; align-items: center; justify-content: center; font-size: 16px; transition: .3s; }
.industry-card:hover .arrow { background: var(--c-primary); transform: translateX(4px); }

/* 图标式行业网格（无图版） */
.icon-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.icon-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  padding: 34px 30px; transition: .3s;
}
.icon-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); border-color: transparent; }
.icon-card .icon-box {
  width: 56px; height: 56px; border-radius: 14px; background: linear-gradient(135deg, #e8f0ff, #f4f8ff);
  display: flex; align-items: center; justify-content: center; margin-bottom: 20px;
}
.icon-card .icon-box svg { width: 30px; height: 30px; }
.icon-card h3 { font-size: 18px; margin-bottom: 10px; }
.icon-card p { font-size: 14px; color: var(--c-text-2); margin-bottom: 14px; }
.icon-card .apps { font-size: 12.5px; color: var(--c-primary); background: rgba(10,92,255,.06); padding: 8px 12px; border-radius: 8px; line-height: 1.8; }

/* ---------- 数字横幅 ---------- */
.stats-band { background: linear-gradient(135deg, #0a1836, #0b2545 55%, #08306b); color: #fff; padding: 64px 0; }
.stats-band .grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stats-band .num { font-size: clamp(28px, 3.4vw, 44px); font-weight: 700; font-family: Georgia, serif; }
.stats-band .num i { font-style: normal; color: #6ea8ff; }
.stats-band .lbl { font-size: 14px; color: #8fa3c4; margin-top: 6px; }

/* ---------- 案例 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.case-card {
  border-radius: var(--radius); overflow: hidden; position: relative; min-height: 380px;
  display: flex; align-items: flex-end; color: #fff; isolation: isolate;
}
.case-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: .6s; z-index: -2; }
.case-card::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(180deg, rgba(8,12,24,.05) 25%, rgba(8,12,24,.9) 100%); }
.case-card:hover img { transform: scale(1.05); }
.case-card .body { padding: 30px; }
.case-card .cat { display: inline-block; font-size: 12px; letter-spacing: 2px; padding: 5px 14px; border-radius: 999px; background: rgba(10,92,255,.85); margin-bottom: 14px; }
.case-card h3 { font-size: 21px; margin-bottom: 10px; }
.case-card p { font-size: 14px; color: #c8d1e0; max-width: 520px; }

/* 案例 - 客户 logo 墙 */
.logo-wall { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.logo-wall .cell {
  background: #fff; border: 1px solid var(--c-line); border-radius: 12px; height: 86px;
  display: flex; align-items: center; justify-content: center; font-weight: 700; color: #9aa5b5;
  font-size: 15px; letter-spacing: 1px; transition: .3s;
}
.logo-wall .cell:hover { color: var(--c-primary); border-color: var(--c-primary); }

/* ---------- 解决方案步骤 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
.step { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 30px 26px; position: relative; }
.step .no { font-family: Georgia, serif; font-size: 40px; font-weight: 700; color: rgba(10,92,255,.15); line-height: 1; margin-bottom: 16px; }
.step h3 { font-size: 17px; margin-bottom: 10px; }
.step p { font-size: 13.5px; color: var(--c-text-2); }

/* ---------- 服务与支持 ---------- */
.support-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.support-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 36px 32px;
  display: flex; gap: 22px; transition: .3s;
}
.support-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.support-card .icon-box {
  width: 58px; height: 58px; flex: none; border-radius: 14px;
  background: linear-gradient(135deg, var(--c-primary), #4d8dff);
  display: flex; align-items: center; justify-content: center;
}
.support-card .icon-box svg { width: 28px; height: 28px; }
.support-card h3 { font-size: 19px; margin-bottom: 8px; }
.support-card p { font-size: 14px; color: var(--c-text-2); }

/* FAQ */
.faq-item { border-bottom: 1px solid var(--c-line); }
.faq-item button {
  width: 100%; background: none; border: none; text-align: left; padding: 22px 8px;
  font-size: 16.5px; font-weight: 600; color: var(--c-text); cursor: pointer;
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
.faq-item button .plus { font-size: 22px; color: var(--c-primary); transition: .3s; flex: none; }
.faq-item.open .plus { transform: rotate(45deg); }
.faq-item .ans { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-item .ans p { padding: 0 8px 22px; color: var(--c-text-2); font-size: 14.5px; max-width: 900px; }

/* 联系表单 */
.contact-wrap { display: grid; grid-template-columns: 1fr 1.3fr; gap: 48px; align-items: start; }
.contact-info h3 { font-size: 24px; margin-bottom: 16px; }
.contact-info p { color: var(--c-text-2); font-size: 15px; margin-bottom: 28px; }
.contact-info .row { display: flex; gap: 14px; align-items: flex-start; margin-bottom: 18px; font-size: 14.5px; }
.contact-info .row .ic { width: 40px; height: 40px; flex: none; border-radius: 10px; background: rgba(10,92,255,.08); display: flex; align-items: center; justify-content: center; }
.contact-info .row .ic svg { width: 20px; height: 20px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-grid .full { grid-column: 1 / -1; }
.form-grid input, .form-grid select, .form-grid textarea {
  width: 100%; padding: 13px 16px; border: 1px solid var(--c-line); border-radius: 10px;
  font-size: 14.5px; font-family: inherit; background: #fff; color: var(--c-text); outline: none; transition: .2s;
}
.form-grid input:focus, .form-grid select:focus, .form-grid textarea:focus { border-color: var(--c-primary); box-shadow: 0 0 0 3px rgba(10,92,255,.12); }
.form-grid textarea { resize: vertical; min-height: 110px; }

/* ---------- 关于我们 ---------- */
.about-split { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; }
.about-split .pic { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.about-split h2 { font-size: clamp(24px, 3vw, 34px); margin-bottom: 18px; }
.about-split p { color: var(--c-text-2); font-size: 15px; margin-bottom: 14px; }
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.value-card { text-align: center; padding: 40px 26px; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); }
.value-card .icon-box { width: 62px; height: 62px; margin: 0 auto 20px; border-radius: 50%; background: linear-gradient(135deg, #e8f0ff, #f4f8ff); display: flex; align-items: center; justify-content: center; }
.value-card .icon-box svg { width: 30px; height: 30px; }
.value-card h3 { font-size: 18px; margin-bottom: 10px; }
.value-card p { font-size: 14px; color: var(--c-text-2); }

/* 时间线 */
.timeline { position: relative; max-width: 860px; margin: 0 auto; padding-left: 36px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(180deg, var(--c-primary), #bcd2ff); }
.tl-item { position: relative; padding-bottom: 40px; }
.tl-item::before {
  content: ""; position: absolute; left: -34px; top: 7px; width: 14px; height: 14px; border-radius: 50%;
  background: #fff; border: 3px solid var(--c-primary);
}
.tl-item .year { font-family: Georgia, serif; font-size: 22px; font-weight: 700; color: var(--c-primary); }
.tl-item h3 { font-size: 17px; margin: 4px 0 6px; }
.tl-item p { font-size: 14px; color: var(--c-text-2); max-width: 640px; }

/* 荣誉 */
.honor-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.honor-card { background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.12); border-radius: 12px; padding: 28px 22px; text-align: center; }
.honor-card .medal { font-size: 30px; margin-bottom: 12px; }
.honor-card h3 { font-size: 15.5px; font-weight: 600; }
.honor-card p { font-size: 12.5px; color: #8fa3c4; margin-top: 6px; }

/* ---------- 页面 Banner ---------- */
.page-banner {
  background: linear-gradient(120deg, #0a1836 0%, #0b2545 55%, #0a3a7c 100%);
  color: #fff; padding: 170px 0 90px; text-align: center; position: relative; overflow: hidden;
}
.page-banner::before {
  content: ""; position: absolute; right: -120px; top: -120px; width: 460px; height: 460px;
  border-radius: 50%; background: radial-gradient(circle, rgba(50,120,255,.35), transparent 65%);
}
.page-banner h1 { font-size: clamp(30px, 4vw, 46px); letter-spacing: 2px; }
.page-banner p { margin-top: 14px; color: #9db4d8; font-size: 16px; max-width: 640px; margin-inline: auto; }
.crumbs { font-size: 13px; color: #7e94bb; margin-top: 22px; letter-spacing: 1px; }
.crumbs a { color: #b9cae8; }
.crumbs a:hover { color: #fff; }

/* ---------- 新闻 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.news-card { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); overflow: hidden; transition: .3s; }
.news-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.news-card .pic { aspect-ratio: 16/9; background: linear-gradient(135deg, #0b2545, #0a5cff); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,.25); font-size: 40px; font-weight: 800; letter-spacing: 4px; }
.news-card .body { padding: 24px; }
.news-card .date { font-size: 12.5px; color: var(--c-text-2); letter-spacing: 1px; }
.news-card h3 { font-size: 16.5px; margin: 8px 0 10px; line-height: 1.5; }
.news-card p { font-size: 13.5px; color: var(--c-text-2); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--c-dark); color: #aab4c6; padding: 72px 0 0; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 48px; }
.footer-grid h4 { color: #fff; font-size: 15px; margin-bottom: 18px; letter-spacing: 1px; }
.footer-grid li { margin-bottom: 11px; }
.footer-grid a { color: #aab4c6; font-size: 13.5px; transition: .2s; }
.footer-grid a:hover { color: #fff; }
.footer-brand p { font-size: 13.5px; margin: 16px 0 22px; max-width: 300px; line-height: 1.8; }
.footer-brand .hotline { font-size: 22px; font-weight: 700; color: #fff; font-family: Georgia, serif; }
.footer-brand .hotline small { display: block; font-size: 12px; color: #8a94a8; font-weight: 400; font-family: inherit; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 22px 0; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 12.5px; color: #6f7a8e; }

/* ---------- 动画 ---------- */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity .8s ease, transform .8s ease; }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .12s; } .reveal.d2 { transition-delay: .24s; } .reveal.d3 { transition-delay: .36s; }

/* ---------- 追加：真实内容版块 ---------- */

/* 产品详情分栏 */
.pd { display: grid; grid-template-columns: 1fr 1.15fr; gap: 44px; align-items: center; margin-bottom: 72px; }
.pd:last-child { margin-bottom: 0; }
.pd.rev .pd-pic { order: 2; }
.pd-pic img { border-radius: var(--radius); width: 100%; box-shadow: var(--shadow); object-fit: cover; }
.pd-info h3 { font-size: 24px; margin-bottom: 6px; }
.pd-info .sub { font-size: 13px; color: var(--c-text-2); letter-spacing: 1px; margin-bottom: 16px; }
.pd-info p.desc { font-size: 14.5px; color: var(--c-text-2); margin-bottom: 18px; }
.spec-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 18px 0; }
.spec-cell { background: var(--c-bg-soft); border-radius: 10px; padding: 12px 10px; text-align: center; }
.spec-cell b { display: block; font-size: 16px; color: var(--c-primary); }
.spec-cell span { font-size: 12px; color: var(--c-text-2); }

/* 技术要点/场景列表 */
.feat-list li { position: relative; padding-left: 24px; margin-bottom: 9px; font-size: 14.5px; color: var(--c-text-2); }
.feat-list li::before { content: "✓"; position: absolute; left: 0; color: var(--c-primary); font-weight: 700; }
.feat-list.dash li::before { content: "—"; font-weight: 600; }
.block-title { font-size: 15px; font-weight: 700; margin: 20px 0 12px; display: flex; align-items: center; gap: 8px; }
.block-title::before { content: ""; width: 4px; height: 16px; border-radius: 2px; background: var(--c-primary); }

/* ZK 平台卡片 */
.platform-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.platform-card { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 30px; transition: .3s; }
.platform-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.platform-card h3 { font-size: 19px; margin-bottom: 4px; }
.platform-card .p-en { font-size: 12px; letter-spacing: 2px; color: var(--c-primary); margin-bottom: 14px; }
.platform-card p { font-size: 14px; color: var(--c-text-2); margin-bottom: 18px; }
.metric-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; border-top: 1px dashed var(--c-line); padding-top: 16px; }
.metric-row div b { display: block; font-size: 17px; color: var(--c-primary); font-family: Georgia, serif; }
.metric-row div span { font-size: 11.5px; color: var(--c-text-2); }

/* 四维卡片（降本/增效） */
.quad-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.quad-card { background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.14); border-radius: 12px; padding: 26px 22px; }
.quad-card h3 { font-size: 16.5px; margin-bottom: 8px; }
.quad-card p { font-size: 13px; color: #9db0cc; }

/* 技术参数表 */
.param-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.param-table th, .param-table td { padding: 15px 20px; text-align: left; font-size: 14px; border-bottom: 1px solid var(--c-line); }
.param-table th { background: var(--c-dark); color: #fff; font-weight: 600; letter-spacing: 1px; }
.param-table tr:last-child td { border-bottom: none; }
.param-table td:first-child { font-weight: 600; white-space: nowrap; }
.param-table tr:nth-child(even) td { background: var(--c-bg-soft); }
.table-wrap { overflow-x: auto; }

/* 系列横幅 */
.sol-banner { position: relative; border-radius: var(--radius); overflow: hidden; min-height: 260px; display: flex; align-items: flex-end; color: #fff; margin-bottom: 36px; }
.sol-banner img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.sol-banner::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(6,12,28,.85), rgba(6,12,28,.25)); }
.sol-banner .body { position: relative; z-index: 2; padding: 34px; }
.sol-banner h3 { font-size: 26px; margin-bottom: 8px; }
.sol-banner p { font-size: 14px; color: #c9d4e6; max-width: 720px; }
.sol-feats { display: flex; gap: 26px; flex-wrap: wrap; margin-top: 16px; }
.sol-feats b { font-size: 14px; }
.sol-feats span { display: block; font-size: 12px; color: #9db0cc; font-weight: 400; }

/* 采购合作 */
.coop-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 48px; }
.coop-card { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 34px 30px; text-align: center; transition: .3s; }
.coop-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.coop-card .ic { width: 64px; height: 64px; margin: 0 auto 18px; border-radius: 50%; background: linear-gradient(135deg, var(--c-primary), #4d8dff); display: flex; align-items: center; justify-content: center; }
.coop-card .ic svg { width: 30px; height: 30px; }
.coop-card h3 { font-size: 18px; margin-bottom: 10px; }
.coop-card p { font-size: 14px; color: var(--c-text-2); }

/* 科研方向卡片 */
.research-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.research-card { background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.14); border-radius: var(--radius); padding: 36px 32px; }
.research-card h3 { font-size: 20px; margin-bottom: 16px; }
.research-card li { position: relative; padding-left: 20px; margin-bottom: 10px; font-size: 14px; color: #a9b8d4; }
.research-card li::before { content: "•"; position: absolute; left: 0; color: #6ea8ff; }

/* 知识产权数据 */
.ip-band { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.ip-band .cell { background: var(--c-bg-soft); border-radius: 12px; padding: 26px 16px; text-align: center; }
.ip-band .cell b { display: block; font-size: 34px; font-family: Georgia, serif; color: var(--c-primary); }
.ip-band .cell span { font-size: 13px; color: var(--c-text-2); }

/* 招聘卡片 */
.job-card { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 32px; margin-bottom: 24px; }
.job-card h3 { font-size: 19px; margin-bottom: 14px; }
.job-card p { font-size: 14px; color: var(--c-text-2); margin-bottom: 12px; }
.job-tag { display: inline-block; font-size: 12.5px; color: var(--c-primary); background: rgba(10,92,255,.07); border-radius: 8px; padding: 6px 12px; margin: 0 8px 8px 0; }

/* 媒体报道 */
.tv-card { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: center; }
.tv-card .pic img { border-radius: var(--radius); box-shadow: var(--shadow); }
.tv-card h3 { font-size: 22px; margin-bottom: 14px; }
.tv-card p { font-size: 14.5px; color: var(--c-text-2); margin-bottom: 10px; }

/* 图片双拼 */
.img-duo { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.img-duo img { border-radius: 12px; width: 100%; object-fit: cover; }

/* 页脚联系 */
.footer-contact div { margin-bottom: 8px; font-size: 13.5px; }

@media (max-width: 1024px) {
  .pd, .tv-card { grid-template-columns: 1fr; }
  .pd.rev .pd-pic { order: 0; }
  .platform-grid, .coop-grid { grid-template-columns: 1fr 1fr; }
  .quad-grid, .ip-band { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .platform-grid, .coop-grid, .quad-grid, .ip-band, .research-grid, .img-duo { grid-template-columns: 1fr; }
  .spec-row { grid-template-columns: 1fr 1fr; }
}

/* ---------- 响应式（原） ---------- */
@media (max-width: 1024px) {
  .product-grid, .industry-grid, .icon-grid, .value-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
  .honor-grid, .steps { grid-template-columns: repeat(2, 1fr); }
  .stats-band .grid { grid-template-columns: repeat(2, 1fr); row-gap: 40px; }
  .logo-wall { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .about-split, .contact-wrap { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .main-nav {
    position: fixed; top: 64px; left: 0; right: 0; background: #fff;
    flex-direction: column; padding: 12px 24px 20px; border-bottom: 1px solid var(--c-line);
    transform: translateY(-130%); transition: .35s; box-shadow: 0 20px 40px rgba(0,0,0,.1);
  }
  .main-nav.open { transform: none; }
  .main-nav ul { flex-direction: column; gap: 2px; }
  .main-nav a { padding: 13px 8px; font-size: 16px; }
  .nav-toggle { display: block; }
  .product-grid, .industry-grid, .icon-grid, .case-grid, .support-grid, .value-grid, .news-grid, .steps, .form-grid { grid-template-columns: 1fr; }
  .honor-grid { grid-template-columns: 1fr 1fr; }
  .logo-wall { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 64px 0; }
  .hero { min-height: 86vh; }
  .footer-grid { grid-template-columns: 1.4fr 1fr; }
}