:root {
  --navy: #07193f;
  --navy-2: #082654;
  --blue: #075fd2;
  --cyan: #0baac1;
  --aqua: #daf6fa;
  --ink: #0b1734;
  --muted: #5d687c;
  --line: #dfe6ef;
  --soft: #f4f9fd;
  --white: #ffffff;
  --container: 1280px;
  --section-space: clamp(50px, 8vw, 80px);
  --radius: 12px;
  --shadow: 0 18px 48px rgba(8, 28, 65, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
  line-height: 1.7;
}
body.menu-open { overflow: hidden; }
img { display: block; width: 100%; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 1000; top: 8px; left: 8px; padding: 10px 16px; background: var(--navy); color: white; transform: translateY(-150%); transition: transform .2s; }
.skip-link:focus { transform: translateY(0); }
.container { width: min(calc(100% - 56px), var(--container)); margin-inline: auto; }
.section { padding-block: var(--section-space); }

.site-header { position: sticky; z-index: 100; top: 0; height: 90px; border-bottom: 1px solid rgba(7, 25, 63, .08); background: rgba(255,255,255,.96); backdrop-filter: blur(14px); }
.header-inner { width: min(calc(100% - 48px), 1480px); height: 100%; margin: auto; display: flex; align-items: center; gap: clamp(24px, 3vw, 52px); }
.brand { display: inline-flex; align-items: center; flex: 0 0 auto; gap: 10px; }
.brand img{ height: 45px; }
.brand-mark { flex: 0 0 auto; width: 42px; height: 42px; }
.brand-copy { display: flex; flex-direction: column; line-height: 1.25; }
.brand-copy strong { color: var(--navy); font-size: 19px; font-weight: 800; letter-spacing: .05em; }
.brand-copy span { margin-top: 3px; color: var(--muted); font-size: 12px; letter-spacing: .18em; }
.desktop-nav { display: flex; align-items: center; justify-content: center; gap: clamp(14px, 2.2vw, 34px); flex: 1; height: 100%; }
.nav-item { position: relative; height: 100%; }
.desktop-nav .nav-item > a { position: relative; display: inline-flex; align-items: center; gap: 7px; height: 100%; color: #15213d; font-size: 15px; font-weight: 500; white-space: nowrap; transition: color .2s; }
.desktop-nav .nav-item > a::after { content: ""; position: absolute; right: 50%; bottom: 0; left: 50%; height: 3px; background: var(--blue); transition: inset .25s ease; }
.desktop-nav .nav-item > a:hover, .desktop-nav .nav-item > a:focus-visible, .desktop-nav .nav-item > a.is-active { color: var(--blue); }
.desktop-nav .nav-item > a:hover::after, .desktop-nav .nav-item > a:focus-visible::after, .desktop-nav .nav-item > a.is-active::after { right: 0; left: 0; }
.caret { width: 8px; height: 8px; border-right: 1.7px solid currentColor; border-bottom: 1.7px solid currentColor; transform: translateY(-3px) rotate(45deg); transition: transform .25s ease; }
.nav-item.has-dropdown:hover .caret, .nav-item.has-dropdown:focus-within .caret, .nav-item.has-dropdown.is-open .caret, .m-sub-toggle[aria-expanded="true"] .caret { transform: translateY(1px) rotate(-135deg); }

.dropdown { position: absolute; top: 100%; left: 50%; z-index: 60; min-width: 208px; padding: 10px; border: 1px solid var(--line); border-radius: 12px; background: #fff; box-shadow: 0 22px 48px rgba(8, 28, 65, .16); opacity: 0; visibility: hidden; transform: translate(-50%, 10px); transition: opacity .22s ease, transform .22s ease, visibility .22s; }
.nav-item.has-dropdown:hover > .dropdown, .nav-item.has-dropdown:focus-within > .dropdown, .nav-item.has-dropdown.is-open > .dropdown { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.dropdown-inner { display: grid; gap: 2px; }
.dropdown-inner > a { padding: 11px 16px; border-radius: 8px; color: #25324a; font-size: 14px; transition: background .18s, color .18s; }
.dropdown-inner > a:hover, .dropdown-inner > a:focus-visible { background: var(--soft); color: var(--blue); }
.dropdown.mega { left: 0; min-width: min(660px, 84vw); padding: 24px; transform: translate(0, 10px); }
.nav-item.has-dropdown:hover > .dropdown.mega, .nav-item.has-dropdown:focus-within > .dropdown.mega, .nav-item.has-dropdown.is-open > .dropdown.mega { transform: translate(0, 0); }
.dropdown.mega .dropdown-inner { grid-template-columns: 190px 1fr; gap: 30px; }
.mega-col { display: grid; align-content: start; gap: 2px; }
.mega-col.mega-hot { border-left: 1px solid var(--line); padding-left: 30px; }
.mega-label { margin-bottom: 8px; color: #8d96a6; font-size: 12px; font-weight: 700; letter-spacing: .12em; }
.mega-hot a { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.mega-hot em { flex: 0 0 auto; color: #8d96a6; font-size: 13px; font-style: normal; }
.header-search { display: flex; align-items: center; width: clamp(190px, 18vw, 270px); height: 44px; padding: 0 15px; border: 1px solid #cdd6e2; border-radius: 9px; background: white; transition: border-color .2s, box-shadow .2s; }
.header-search:focus-within { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(7,95,210,.1); }
.header-search svg, .mobile-search svg { width: 20px; fill: none; stroke: #647086; stroke-width: 1.7; }
.header-search input { width: 100%; margin-left: 10px; border: 0; outline: 0; color: var(--ink); font-size: 14px; }
.header-search input::placeholder { color: #8d96a6; }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 10px; border: 0; background: transparent; cursor: pointer; }
.menu-toggle span { display: block; width: 24px; height: 2px; margin: 5px auto; background: var(--navy); transition: transform .25s, opacity .25s; }
.mobile-menu { display: none; }

/* ===== HERO 轮播 ===== */
.hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); background: var(--navy); }
.carousel-viewport { overflow: hidden; }
.carousel-track { display: flex; transition: transform .72s cubic-bezier(.22, .61, .36, 1); }
.slide { position: relative; display: flex; flex: 0 0 100%; align-items: center; min-height: clamp(500px, 58vh, 640px); overflow: hidden; }
.slide-media { position: absolute; inset: 0; }
.slide-media img { width: 100%; height: 100%; object-fit: cover; object-position: 51% center; }
.slide-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(255,255,255,.97) 0%, rgba(255,255,255,.88) 36%, rgba(255,255,255,.42) 62%, rgba(255,255,255,0) 84%); }
.slide-inner { position: relative; z-index: 2; width: min(calc(100% - 56px), var(--container)); margin-inline: auto; }
.slide-copy { max-width: 660px; padding-block: 64px; }
.slide-eyebrow { display: inline-block; margin-bottom: 20px; padding: 6px 14px; border-radius: 100px; background: rgba(7, 95, 210, .1); color: var(--blue); font-size: 13px; font-weight: 700; letter-spacing: .06em; }
.slide h1, .slide h2 { max-width: 640px; margin: 0; color: var(--navy); font-size: clamp(38px, 4vw, 62px); line-height: 1.14; letter-spacing: -.05em; }
.slide p { max-width: 540px; margin: 24px 0 0; color: #27334b; font-size: clamp(16px, 1.3vw, 20px); line-height: 1.8; }
.slide-art { background: linear-gradient(115deg, #e9f6fd 0%, #ffffff 46%, #f1fbfe 100%); }
.slide-art-alt { background: linear-gradient(115deg, #eef4ff 0%, #ffffff 44%, #e8fbfd 100%); }
.slide-art-alt::after { content: ""; position: absolute; top: -22%; right: -8%; width: min(760px, 58%); aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle, rgba(11,170,193,.24) 0, rgba(7,95,210,.12) 52%, transparent 72%); }
.slide-art .molecule-lines { position: absolute; right: -2%; bottom: -8%; width: min(700px, 60%); color: var(--cyan); opacity: .4; }

.carousel-arrow { position: absolute; top: 50%; z-index: 6; display: grid; width: 54px; height: 54px; place-items: center; border: 1px solid rgba(7, 25, 63, .12); border-radius: 50%; background: rgba(255, 255, 255, .86); backdrop-filter: blur(6px); cursor: pointer; transform: translateY(-50%); transition: background .2s, box-shadow .2s, opacity .2s; }
.carousel-arrow svg { width: 22px; fill: none; stroke: var(--navy); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; transition: stroke .2s; }
.carousel-arrow:hover, .carousel-arrow:focus-visible { background: #fff; box-shadow: 0 12px 28px rgba(8, 28, 65, .18); }
.carousel-arrow:hover svg, .carousel-arrow:focus-visible svg { stroke: var(--blue); }
.carousel-prev { left: max(16px, calc((100vw - 1420px) / 2)); }
.carousel-next { right: max(16px, calc((100vw - 1420px) / 2)); }
.carousel-dots { position: absolute; z-index: 6; bottom: 28px; left: 50%; display: flex; gap: 10px; transform: translateX(-50%); }
.carousel-dots button { width: 28px; height: 4px; padding: 0; border: 0; border-radius: 3px; background: rgba(7, 25, 63, .2); cursor: pointer; transition: width .28s ease, background .28s ease; }
.carousel-dots button.is-active { width: 52px; background: var(--blue); }

.hero-actions { display: flex; align-items: center; gap: 42px; margin-top: 42px; }
.button { display: inline-flex; min-height: 54px; align-items: center; justify-content: center; padding: 0 28px; border-radius: 7px; font-size: 16px; font-weight: 700; transition: transform .2s, box-shadow .2s, background .2s; }
.button-primary { background: var(--blue); color: white; box-shadow: 0 10px 24px rgba(7,95,210,.18); }
.button-primary:hover, .button-primary:focus-visible { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(7,95,210,.26); background: #064fac; }
.text-link, .line-link { color: var(--blue); font-weight: 650; }
.text-link span, .line-link span { display: inline-block; margin-left: 12px; transition: transform .2s; }
.text-link:hover span, .line-link:hover span { transform: translateX(5px); }
.section-heading h2 { margin: 0; color: var(--navy); font-size: clamp(34px, 3vw, 48px); line-height: 1.2; letter-spacing: -.035em; }
.section-heading.centered { text-align: center; }
.title-rule { display: block; width: 68px; height: 3px; margin-top: 20px; background: linear-gradient(90deg, var(--blue), var(--cyan)); }
.centered .title-rule { margin-inline: auto; }
.product-list { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 68px; }
.product-item { display: grid; grid-template-columns: 112px 1fr; gap: 30px; min-height: 280px; padding: 18px 44px 10px; border-right: 1px solid var(--line); }
.product-item:first-child { padding-left: 0; }
.product-item:last-child { padding-right: 0; border-right: 0; }
.product-icon { display: grid; width: 112px; height: 112px; place-items: center; color: var(--blue); background: radial-gradient(circle, #ebfbfd 0 35%, transparent 36%); }
.product-icon svg { width: 92px; height: 92px; fill: none; stroke: currentColor; stroke-width: 2.25; stroke-linecap: round; stroke-linejoin: round; }
.product-item h3 { margin: 6px 0 13px; color: var(--navy); font-size: 23px; line-height: 1.4; }
.product-item p { min-height: 100px; margin: 0; color: var(--muted); font-size: 15px; line-height: 1.85; }
.line-link { position: relative; display: inline-flex; margin-top: 24px; padding-bottom: 5px; font-size: 15px; }
.line-link::after { content: ""; position: absolute; right: 38px; bottom: 0; left: 0; height: 2px; background: var(--blue); }

/* ===== 产品列表版块 ===== */
.section-heading-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; margin-bottom: 48px; }
.more-link { display: inline-flex; align-items: center; gap: 8px; padding-bottom: 6px; border-bottom: 2px solid transparent; color: var(--blue); font-size: 15px; font-weight: 650; transition: border-color .2s; }
.more-link:hover, .more-link:focus-visible { border-color: var(--blue); }
.more-link span { display: inline-block; transition: transform .2s; }
.more-link:hover span, .more-link:focus-visible span { transform: translateX(5px); }

.hot-products { background: linear-gradient(180deg, #fbfdff 0%, #f5fafe 100%); }
.product-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 26px; }
.product-card { position: relative; display: flex; flex-direction: column; overflow: hidden; border: 1px solid var(--line); border-radius: 14px; background: #fff; transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease; }
.product-card:hover, .product-card:focus-visible { transform: translateY(-6px); border-color: rgba(7, 95, 210, .38); box-shadow: 0 20px 44px rgba(8, 28, 65, .13); }
.product-badge { position: absolute; z-index: 2; top: 14px; left: 14px; padding: 4px 11px; border-radius: 100px; background: rgba(7, 95, 210, .92); color: #fff; font-size: 12px; font-weight: 600; letter-spacing: .02em; }
.product-thumb { display: block; aspect-ratio: 4 / 3; overflow: hidden; background: #f0f8fd; }
.product-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .55s ease; }
.product-card:hover .product-thumb img { transform: scale(1.06); }
.product-body { display: flex; flex-direction: column; gap: 10px; padding: 20px 20px 22px; }
.product-title { color: var(--navy); font-size: 16px; font-weight: 700; line-height: 1.55; transition: color .2s; }
.product-card:hover .product-title { color: var(--blue); }
.product-sku { color: var(--muted); font-size: 14px; letter-spacing: .02em; }

/* ===== 新闻资讯版块 ===== */
.news-features { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; }
.news-card { overflow: hidden; border: 1px solid var(--line); border-radius: 14px; background: #fff; transition: transform .25s ease, box-shadow .25s ease; }
.news-card:hover { transform: translateY(-4px); box-shadow: 0 20px 44px rgba(8, 28, 65, .12); }
.news-card-link { display: grid; grid-template-columns: 230px minmax(0, 1fr); }
.news-thumb { display: block; overflow: hidden; background: #eef6fb; }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .55s ease; }
.news-card:hover .news-thumb img { transform: scale(1.06); }
.news-body { display: grid; align-content: start; gap: 10px; padding: 24px 26px 26px; }
.news-body time { color: var(--cyan); font-size: 13px; font-weight: 700; letter-spacing: .04em; }
.news-body h3 { margin: 0; color: var(--navy); font-size: 19px; line-height: 1.55; transition: color .2s; }
.news-card:hover .news-body h3 { color: var(--blue); }
.news-body p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.85; }
.news-body .line-link { margin-top: 6px; font-size: 14px; }

.news-list { margin-top: 34px; border-top: 1px solid var(--line); }
.news-row { display: grid; grid-template-columns: 116px minmax(0, 1fr) 42px; align-items: center; gap: 22px; padding: 22px 12px; border-bottom: 1px solid var(--line); transition: background .2s, padding .25s ease; }
.news-row:hover, .news-row:focus-visible { padding-inline: 22px; background: var(--soft); }
.news-row time { color: #8d96a6; font-size: 14px; letter-spacing: .02em; }
.news-row-main { display: grid; gap: 6px; }
.news-row-main strong { color: var(--navy); font-size: 16px; font-weight: 700; line-height: 1.6; transition: color .2s; }
.news-row:hover .news-row-main strong { color: var(--blue); }
.news-summary { color: var(--muted); font-size: 14px; line-height: 1.8; }
.news-arrow { justify-self: end; color: var(--blue); font-size: 18px; font-weight: 700; transition: transform .2s; }
.news-row:hover .news-arrow { transform: translateX(5px); }

.applications { border-top: 1px solid #f0f3f7; background: linear-gradient(180deg, #fbfdff 0%, #fff 100%); }
.application-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.16fr); align-items: center; gap: clamp(64px, 7vw, 108px); }
.application-media { aspect-ratio: 1.04; margin: 0; overflow: hidden; border-radius: var(--radius); box-shadow: var(--shadow); }
.application-media img { height: 100%; object-fit: cover; object-position: 47% center; }
.application-list { display: grid; grid-template-columns: 1fr 1fr; margin-top: 38px; border-top: 1px solid var(--line); }
.application-item { display: grid; grid-template-columns: 48px 1fr; gap: 20px; min-height: 190px; padding: 32px 30px 26px 0; border-bottom: 1px solid var(--line); }
.application-item:nth-child(odd) { border-right: 1px solid var(--line); }
.application-item:nth-child(even) { padding-left: 30px; }
.application-item svg { width: 42px; fill: none; stroke: var(--cyan); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.application-item h3 { margin: 0 0 8px; color: var(--navy); font-size: 24px; }
.application-item p { margin: 0 0 12px; color: var(--muted); font-size: 14px; }
.application-item a { color: var(--cyan); font-size: 14px; font-weight: 700; }
.application-item a span { margin-left: 6px; }

.mission { position: relative; overflow: hidden; background: radial-gradient(circle at 80% 50%, #0d3d75 0, var(--navy-2) 30%, var(--navy) 72%); color: white; }
.mission::before { content: ""; position: absolute; inset: 0; opacity: .14; background-image: linear-gradient(rgba(255,255,255,.08) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.08) 1px, transparent 1px); background-size: 76px 76px; mask-image: linear-gradient(90deg, transparent 20%, black 100%); }
.mission-grid { position: relative; min-height: 430px; display: grid; grid-template-columns: 1.15fr .85fr; align-items: center; gap: 70px; padding-block: 76px; }
.mission-copy { max-width: 690px; }
.mission h2 { margin: 0 0 25px; font-size: clamp(38px, 4vw, 58px); line-height: 1.2; letter-spacing: -.04em; }
.mission p { max-width: 650px; margin: 10px 0; color: #cfddf1; font-size: 17px; line-height: 1.95; }
.mission-visual { position: relative; height: 300px; overflow: hidden; border-radius: 50%; mask-image: radial-gradient(ellipse at center, #000 48%, rgba(0,0,0,.7) 68%, transparent 84%); }
.mission-visual img { width: 100%; height: 100%; object-fit: cover; object-position: 65% 44%; opacity: .82; mix-blend-mode: screen; filter: saturate(1.2) contrast(1.08); }

.about-grid { display: grid; grid-template-columns: .88fr 1.12fr; align-items: center; gap: clamp(60px, 7vw, 110px); }
.about-copy h3 { margin: 44px 0 25px; color: var(--navy); font-size: clamp(31px, 3vw, 47px); line-height: 1.42; letter-spacing: -.04em; }
.about-copy p { max-width: 570px; margin: 0 0 14px; color: var(--muted); font-size: 16px; line-height: 1.95; }
.about-media { aspect-ratio: 1.55; margin: 0; overflow: hidden; border-radius: var(--radius); box-shadow: var(--shadow); }
.about-media img { height: 100%; object-fit: cover; object-position: 42% center; }

.resources { padding-block: 68px 80px; border-top: 1px solid var(--line); background: #fbfdff; }
.resources-grid { display: grid; grid-template-columns: .25fr .75fr; align-items: start; gap: 70px; }
.resource-list { border-top: 1px solid #bcc9da; }
.resource-row { display: grid; grid-template-columns: 64px 1fr 40px; align-items: center; min-height: 88px; border-bottom: 1px solid #bcc9da; transition: color .2s, padding .2s, background .2s; }
.resource-row:hover, .resource-row:focus-visible { padding-inline: 14px; color: var(--blue); background: white; }
.document-icon svg { width: 36px; height: 42px; fill: none; stroke: var(--blue); stroke-width: 1.5; }
.document-icon text { fill: var(--blue); stroke: none; font: 8px Arial; }
.resource-row strong { color: var(--navy); font-size: 19px; }
.download-icon svg { width: 28px; fill: none; stroke: var(--blue); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }

.site-footer { background: var(--navy); color: white; }
.footer-grid { display: grid; grid-template-columns: .3fr .7fr; gap: 75px; padding-block: 70px 58px; }
.brand-inverse .brand-copy { color: white; }
.footer-brand > p { margin: 10px 0 5px; color: #d7e2f2; font-size: 15px; }
.footer-note { color: #65d7e2; font-size: 13px; letter-spacing: .22em; }
.footer-links { display: grid; grid-template-columns: repeat(4, 1fr); gap: 36px; }
.footer-links div { display: flex; flex-direction: column; gap: 10px; }
.footer-links h2 { margin: 0 0 7px; font-size: 16px; }
.footer-links a { width: fit-content; color: #aebdd1; font-size: 14px; transition: color .2s; }
.footer-links a:hover, .footer-links a:focus-visible { color: #62d7e1; }
.footer-bottom { display: flex; justify-content: space-between; padding-block: 22px; border-top: 1px solid rgba(255,255,255,.12); color: #7f91ac; font-size: 12px; }

.toast { position: fixed; z-index: 999; right: 24px; bottom: 24px; max-width: min(380px, calc(100% - 48px)); padding: 14px 18px; border-radius: 8px; background: var(--navy); color: white; box-shadow: 0 12px 36px rgba(0,0,0,.2); opacity: 0; transform: translateY(12px); pointer-events: none; transition: opacity .2s, transform .2s; }
.toast.is-visible { opacity: 1; transform: translateY(0); }
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-delay, .reveal-delay-1 { transition-delay: .1s; }
.reveal-delay-2 { transition-delay: .2s; }

@media (max-width: 1240px) {
  .desktop-nav { gap: 16px; }
  .desktop-nav .nav-item > a { font-size: 14px; }
  .dropdown.mega { min-width: min(560px, 88vw); padding: 20px; }
  .dropdown.mega .dropdown-inner { grid-template-columns: 160px 1fr; gap: 22px; }
}

@media (max-width: 1180px) {
  .header-search { display: none; }
  .product-item { grid-template-columns: 80px 1fr; padding-inline: 28px; }
  .product-icon { width: 80px; height: 90px; }
  .product-icon svg { width: 75px; height: 75px; }
  .product-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
  .news-card-link { grid-template-columns: 180px minmax(0, 1fr); }
}

@media (max-width: 980px) {
  .carousel-arrow { width: 46px; height: 46px; }
  .slide-media::after { background: linear-gradient(90deg, rgba(255,255,255,.97) 0%, rgba(255,255,255,.92) 52%, rgba(255,255,255,.55) 100%); }
}

@media (max-width: 900px) {
  .container { width: min(calc(100% - 40px), var(--container)); }
  .desktop-nav { display: none; }
  .header-inner { width: calc(100% - 32px); justify-content: space-between; }
  .menu-toggle { display: block; }
  .menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .mobile-menu { inset: 90px 0 0; display: block; padding: 30px 22px 40px; background:var(--navy); opacity: 0; visibility: hidden; transform: translateY(-12px); transition: opacity .25s, visibility .25s, transform .25s; }
  .mobile-menu.is-open { opacity: 1; visibility: visible; transform: translateY(0); }
  .mobile-menu nav { display: grid; }
  .m-item > a, .m-sub-toggle { display: flex; align-items: center; justify-content: space-between; gap: 12px; width: 100%; padding: 16px 4px; border: 0; border-bottom: 1px solid var(--line); background: none; color: var(--white); font-size: 18px; font-weight: 650; text-align: left; cursor: pointer; }
  .m-sub-toggle .caret { width: 9px; height: 9px; }
  .m-sub { display: grid; max-height: 0; overflow: hidden; background: #f8fbfe; transition: max-height .32s ease; }
  .m-sub.is-open { max-height: 680px; }
  .m-sub a { padding: 13px 4px 13px 18px; border-bottom: 1px solid #edf2f7; color: #3b4a63; font-size: 15px; font-weight: 500; }
  .m-sub .mega-label { padding: 16px 4px 4px 18px; }
  .mobile-search { display: flex; margin-top: 28px; border: 1px solid #cdd6e2; border-radius: 8px; overflow: hidden; }
  .mobile-search input { width: 100%; height: 50px; padding: 0 15px; border: 0; outline: 0; }
  .mobile-search button { width: 54px; border: 0; background: var(--blue); }
  .mobile-search button svg { stroke: white; }
  .slide { min-height: 470px; }
  .slide-inner { width: calc(100% - 48px); }
  .slide-copy { padding-block: 72px; }
  .carousel-dots { bottom: 20px; }
  .section-heading-row { align-items: flex-start; flex-direction: column; gap: 18px; margin-bottom: 36px; }
  .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .news-features { grid-template-columns: 1fr; }
  .news-row { grid-template-columns: 100px minmax(0, 1fr) 32px; gap: 16px; }
  .product-list { grid-template-columns: 1fr; }
  .product-item, .product-item:first-child, .product-item:last-child { grid-template-columns: 100px 1fr; min-height: 0; padding: 32px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .product-item:last-child { border-bottom: 0; }
  .product-item p { min-height: 0; }
  .application-grid, .about-grid { grid-template-columns: 1fr; }
  .application-media { aspect-ratio: 1.45; }
  .mission-grid { grid-template-columns: 1fr; gap: 20px; }
  .mission-visual { height: 220px; }
  .about-media { order: -1; }
  .resources-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  :root { --section-space: 76px; }
  .site-header { height: 72px; }
  .brand-mark { width: 38px; height: 38px; }
  .brand-copy strong { font-size: 17px; }
  .brand-copy span { margin-top: 4px; font-size: 11px; }
  .mobile-menu { inset-block-start: 72px; }
  .slide { min-height: 420px; }
  .slide-inner { width: calc(100% - 40px); }
  .slide-copy { padding-block: 60px; }
  .slide h1, .slide h2 { font-size: clamp(32px, 9vw, 46px); letter-spacing: -.05em; }
  .slide p { margin-top: 18px; font-size: 16px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 20px; margin-top: 30px; }
  .button { min-height: 50px; padding-inline: 24px; }
  .carousel-arrow { width: 42px; height: 42px; opacity: .9; }
  .product-grid { grid-template-columns: 1fr; }
  .news-card-link { grid-template-columns: 1fr; }
  .news-thumb { aspect-ratio: 1.9; }
  .news-body { padding: 20px 20px 22px; }
  .news-row { grid-template-columns: 1fr; gap: 8px; padding: 18px 8px; }
  .news-row:hover, .news-row:focus-visible { padding-inline: 14px; }
  .news-arrow { display: none; }
  .section-heading h2 { font-size: 34px; }
  .product-list { margin-top: 40px; }
  .product-item, .product-item:first-child, .product-item:last-child { grid-template-columns: 72px 1fr; gap: 20px; }
  .product-icon { width: 72px; height: 80px; }
  .product-icon svg { width: 66px; height: 66px; }
  .product-item h3 { font-size: 20px; }
  .application-media { aspect-ratio: .95; }
  .application-media img { object-position: 44% center; }
  .application-list { grid-template-columns: 1fr; }
  .application-item, .application-item:nth-child(even) { min-height: 0; padding: 26px 0; border-right: 0; }
  .mission-grid { padding-block: 68px 56px; }
  .mission h2 { font-size: 38px; }
  .mission p { font-size: 15px; }
  .mission-visual { transform: scale(.84); }
  .about-copy h3 { margin-top: 34px; font-size: 31px; }
  .about-media { aspect-ratio: 1.05; }
  .about-media img { object-position: 35% center; }
  .resources { padding-block: 62px; }
  .resource-row { grid-template-columns: 54px 1fr 32px; }
  .footer-links { grid-template-columns: 1fr 1fr; row-gap: 42px; }
  .footer-bottom { align-items: flex-start; flex-direction: column; gap: 5px; }
}

/* =========================================================
   内页通用组件（栏目横幅 / 面包屑 / 侧栏 / 正文区块 / 表单）
   ========================================================= */
.page-banner { position: relative; overflow: hidden; background: radial-gradient(circle at 82% 40%, #0d3d75 0, var(--navy-2) 34%, var(--navy) 76%); color: #fff; }
.page-banner::before { content: ""; position: absolute; inset: 0; opacity: .16; background-image: linear-gradient(rgba(255,255,255,.08) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.08) 1px, transparent 1px); background-size: 72px 72px; mask-image: linear-gradient(90deg, transparent 30%, black 100%); }
.page-banner-inner { position: relative; z-index: 2; padding-block: clamp(58px, 6vw, 92px); }
.page-banner h1 { margin: 16px 0 0; font-size: clamp(34px, 3.6vw, 52px); line-height: 1.18; letter-spacing: -.04em; }
.page-banner p { max-width: 720px; margin: 16px 0 0; color: #cfddf1; font-size: clamp(15px, 1.2vw, 18px); line-height: 1.9; }
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; color: #8fa6c4; font-size: 13px; }
.breadcrumb a { color: #a9c6e8; transition: color .2s; }
.breadcrumb a:hover, .breadcrumb a:focus-visible { color: #65d7e2; }
.breadcrumb .sep { color: #56708f; }
.breadcrumb .current { color: #eaf2fb; }

.page-body { display: grid; grid-template-columns: 258px minmax(0, 1fr); align-items: start; gap: clamp(36px, 4.5vw, 76px); padding-block: clamp(56px, 6vw, 88px) clamp(70px, 7vw, 110px); }
.page-body.full { grid-template-columns: minmax(0, 1fr); }

.side-nav { border: 1px solid var(--line); border-radius: 12px; background: #fff; box-shadow: 0 10px 30px rgba(8, 28, 65, .05); overflow: hidden; }
.side-nav-title { padding: 20px 22px; border-bottom: 1px solid var(--line); background: linear-gradient(120deg, #f3f9fe, #eaf5fc); color: var(--navy); font-size: 17px; font-weight: 700; letter-spacing: -.01em; }
.side-nav ul { margin: 0; padding: 10px; list-style: none; }
.side-nav li + li { margin-top: 2px; }
.side-nav a { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 14px; border-radius: 8px; color: #33445f; font-size: 15px; transition: background .18s, color .18s; }
.side-nav a::after { content: "→"; color: #b9c6d6; font-size: 13px; transition: transform .2s, color .2s; }
.side-nav a:hover, .side-nav a:focus-visible { background: var(--soft); color: var(--blue); }
.side-nav a:hover::after { transform: translateX(4px); color: var(--blue); }
.side-nav li.is-active a { background: var(--blue); color: #fff; font-weight: 650; }
.side-nav li.is-active a::after { color: rgba(255, 255, 255, .75); }
.side-card { margin-top: 24px; padding: 26px 24px; border-radius: 12px; background: linear-gradient(150deg, var(--navy-2), var(--navy)); color: #fff; }
.side-card h2 { margin: 0 0 10px; font-size: 18px; }
.side-card p { margin: 0 0 20px; color: #c2d4ec; font-size: 14px; line-height: 1.85; }
.side-card .button { width: 100%; min-height: 46px; font-size: 15px; }
.side-card .button-primary { background: var(--cyan); box-shadow: none; }
.side-card .button-primary:hover, .side-card .button-primary:focus-visible { background: #0995a9; }

.block + .block { margin-top: clamp(52px, 5vw, 78px); }
.block-head { margin-bottom: 30px; }
.block-head h2 { margin: 0; color: var(--navy); font-size: clamp(24px, 2.2vw, 32px); line-height: 1.35; letter-spacing: -.03em; }
.block-head .title-rule { margin-top: 16px; }
.block-head p { max-width: 780px; margin: 14px 0 0; color: var(--muted); font-size: 15px; line-height: 1.9; }
.block-lead { color: #2b3a55; font-size: 16px; line-height: 2; }
.block-lead p { margin: 0 0 16px; }
.block-lead p:last-child { margin-bottom: 0; }

/* 卡片网格 */
.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.card-grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card-grid.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.info-card { display: flex; flex-direction: column; overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: #fff; transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease; }
.info-card:hover { transform: translateY(-5px); border-color: rgba(7, 95, 210, .34); box-shadow: 0 18px 40px rgba(8, 28, 65, .12); }
.info-card-media { aspect-ratio: 16 / 10; overflow: hidden; background: #f0f8fd; }
.info-card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .55s ease; }
.info-card:hover .info-card-media img { transform: scale(1.06); }
.info-card-body { display: flex; flex: 1; flex-direction: column; gap: 10px; padding: 22px 22px 24px; }
.info-card-tag { display: inline-block; width: fit-content; padding: 3px 10px; border-radius: 100px; background: rgba(11, 170, 193, .12); color: #0a8ea1; font-size: 12px; font-weight: 700; }
.info-card-body h3 { margin: 0; color: var(--navy); font-size: 18px; line-height: 1.5; transition: color .2s; }
.info-card:hover .info-card-body h3 { color: var(--blue); }
.info-card-body p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.85; }
.info-card-body .line-link { margin-top: auto; padding-top: 6px; font-size: 14px; }

/* 规格表 */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.spec-table { width: 100%; min-width: 640px; border-collapse: collapse; font-size: 14px; }
.spec-table caption { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
.spec-table th, .spec-table td { padding: 16px 20px; text-align: left; border-bottom: 1px solid #edf2f7; }
.spec-table thead th { background: #f3f9fe; color: var(--navy); font-size: 14px; font-weight: 700; white-space: nowrap; }
.spec-table tbody tr:last-child td { border-bottom: 0; }
.spec-table tbody tr { transition: background .18s; }
.spec-table tbody tr:hover { background: #f7fcff; }
.spec-table td:first-child { color: var(--navy); font-weight: 650; }
.spec-table .sku { color: var(--blue); font-weight: 700; letter-spacing: .02em; }

/* 要点 / 步骤列表 */
.point-list, .step-list { display: grid; gap: 18px; margin: 0; padding: 0; list-style: none; }
.point-list.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.point-item, .step-item { padding: 22px 24px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.step-list { grid-template-columns: repeat(4, minmax(0, 1fr)); counter-reset: step; }
.step-item { position: relative; padding-top: 30px; }
.step-item::before { counter-increment: step; content: "0" counter(step); display: block; margin-bottom: 12px; color: var(--cyan); font-size: 26px; font-weight: 800; letter-spacing: -.02em; }
.point-item h3, .step-item h3 { margin: 0 0 8px; color: var(--navy); font-size: 17px; line-height: 1.5; }
.point-item p, .step-item p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.85; }
.check-list { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.check-list li { position: relative; padding-left: 30px; color: #2b3a55; font-size: 15px; line-height: 1.9; }
.check-list li::before { content: ""; position: absolute; top: 11px; left: 0; width: 16px; height: 9px; border-left: 2.4px solid var(--cyan); border-bottom: 2.4px solid var(--cyan); transform: rotate(-45deg); }

/* 下载列表 */
.download-list { border-top: 1px solid #cbd7e4; }
.download-row { display: grid; grid-template-columns: 56px minmax(0, 1fr) auto; align-items: center; gap: 20px; padding: 20px 12px; border-bottom: 1px solid #dde5ee; transition: background .2s, padding .25s ease; }
.download-row:hover, .download-row:focus-visible { padding-inline: 20px; background: #f7fbff; }
.download-row .document-icon svg { width: 34px; height: 40px; }
.download-row-main { display: grid; gap: 5px; }
.download-row-main strong { color: var(--navy); font-size: 16px; font-weight: 700; }
.download-row-main span { color: var(--muted); font-size: 13px; }
.download-row .download-icon svg { width: 26px; }

/* 表单 */
.form-card { padding: clamp(26px, 3vw, 40px); border: 1px solid var(--line); border-radius: 12px; background: #fff; box-shadow: 0 12px 32px rgba(8, 28, 65, .06); }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.form-field { display: grid; gap: 8px; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { color: var(--navy); font-size: 14px; font-weight: 650; }
.form-field input, .form-field select, .form-field textarea { width: 100%; padding: 12px 14px; border: 1px solid #cdd6e2; border-radius: 8px; background: #fff; color: var(--ink); font: inherit; font-size: 15px; transition: border-color .2s, box-shadow .2s; }
.form-field textarea { min-height: 132px; resize: vertical; }
.form-field input:focus, .form-field select:focus, .form-field textarea:focus { outline: 0; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(7, 95, 210, .12); }
.form-actions { display: flex; align-items: center; gap: 18px; margin-top: 26px; }
.form-note { color: #8d96a6; font-size: 13px; }

/* 联系信息 */
.contact-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.contact-item { padding: 26px 24px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.contact-item h3 { margin: 0 0 12px; color: var(--navy); font-size: 17px; }
.contact-item p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.95; }
.contact-item strong { display: block; margin-top: 6px; color: var(--blue); font-size: 18px; }

/* 图集（荣誉 / 团队） */
.gallery-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 22px; }
.gallery-item { border: 1px solid var(--line); border-radius: 12px; background: #fff; overflow: hidden; transition: transform .25s ease, box-shadow .25s ease; }
.gallery-item:hover { transform: translateY(-5px); box-shadow: 0 18px 40px rgba(8, 28, 65, .12); }
.gallery-thumb { display: grid; aspect-ratio: 4 / 3; place-items: center; background: linear-gradient(140deg, #eef7fd, #e3f2fb); }
.gallery-thumb svg { width: 64%; fill: none; stroke: var(--blue); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.gallery-body { padding: 18px 20px 20px; }
.gallery-body h3 { margin: 0 0 6px; color: var(--navy); font-size: 16px; }
.gallery-body p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

/* 列表页条目 */
.entry-list { border-top: 1px solid var(--line); }
.entry-row { display: grid; grid-template-columns: 116px minmax(0, 1fr) 42px; align-items: center; gap: 22px; padding: 24px 12px; border-bottom: 1px solid var(--line); transition: background .2s, padding .25s ease; }
.entry-row:hover, .entry-row:focus-visible { padding-inline: 22px; background: var(--soft); }
.entry-row time { color: #8d96a6; font-size: 14px; letter-spacing: .02em; }
.entry-row-main { display: grid; gap: 6px; }
.entry-row-main strong { color: var(--navy); font-size: 16px; font-weight: 700; line-height: 1.6; transition: color .2s; }
.entry-row:hover .entry-row-main strong { color: var(--blue); }
.entry-row-main span { color: var(--muted); font-size: 14px; line-height: 1.8; }
.entry-row .news-arrow { justify-self: end; color: var(--blue); font-size: 18px; font-weight: 700; transition: transform .2s; }
.entry-row:hover .news-arrow { transform: translateX(5px); }
.pagination { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 44px; }
.pagination a, .pagination span { display: grid; min-width: 42px; height: 42px; padding: 0 12px; place-items: center; border: 1px solid var(--line); border-radius: 8px; color: #3b4a63; font-size: 14px; transition: background .2s, color .2s, border-color .2s; }
.pagination a:hover, .pagination a:focus-visible { border-color: var(--blue); color: var(--blue); background: var(--soft); }
.pagination .is-current { border-color: var(--blue); background: var(--blue); color: #fff; }

/* 底部行动条 */
.cta-band { padding-block: clamp(56px, 6vw, 84px); background: linear-gradient(120deg, #f2f9ff, #e8f7fb); border-top: 1px solid var(--line); }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.cta-inner h2 { margin: 0; color: var(--navy); font-size: clamp(26px, 2.6vw, 38px); line-height: 1.3; letter-spacing: -.03em; }
.cta-inner p { margin: 12px 0 0; color: var(--muted); font-size: 15px; line-height: 1.9; }

@media (max-width: 1180px) {
  .card-grid, .gallery-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .step-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contact-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .page-side{ margin-bottom:30px;}
  .page-body { display: block; grid-template-columns: 1fr; gap: 34px; }
  .side-nav { position: static; }
  .side-nav ul { display: grid; grid-template-columns: 1fr 1fr; }
  .point-list.cols-2 { grid-template-columns: 1fr; }
  .cta-inner { flex-direction: column; align-items: flex-start; gap: 24px; }
  .entry-row { grid-template-columns: 100px minmax(0, 1fr) 32px; gap: 16px; }
}

@media (max-width: 620px) {
  .card-grid, .card-grid.cols-2, .card-grid.cols-4, .gallery-grid, .step-list, .contact-grid, .form-grid { grid-template-columns: 1fr; }
  .side-nav ul { grid-template-columns: 1fr; }
  .entry-row { grid-template-columns: 1fr; gap: 8px; padding: 18px 8px; }
  .entry-row:hover { padding-inline: 14px; }
  .entry-row .news-arrow { display: none; }
  .download-row { grid-template-columns: 40px minmax(0, 1fr) 28px; gap: 12px; padding: 16px 6px; }
  .form-actions { flex-direction: column; align-items: stretch; }
  .form-actions .button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}