:root {
  /* 品牌色取自 Logo；深色阶沿用 Logo 字标色以保障白字对比度。 */
  --blue: #5bb8e7;
  --blue-dark: #327fa7;
  --navy: #213849;
  --ink: #172b3a;
  --muted: #526775;
  --line: #d7e2e9;
  --pale: #eef8fd;
  --white: #fff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--white); font-family: "Manrope", Arial, sans-serif; line-height: 1.6; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid #f0b429; outline-offset: 4px; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 100; padding: 10px 16px; background: var(--white); transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }

.site-header { position: fixed; z-index: 20; top: 0; width: 100%; height: 78px; background: rgba(255,255,255,.96); border-bottom: 1px solid rgba(33,56,73,.1); backdrop-filter: blur(12px); }
.header-inner { width: min(1350px, calc(100% - 48px)); height: 100%; margin: auto; display: flex; align-items: center; justify-content: space-between; }
/* 适度放大页眉企业 Logo，提升品牌识别度并保持导航栏高度稳定。 */
.brand img { width: 230px; height: 58px; object-fit: contain; }
.site-nav { display: flex; align-items: center; gap: 42px; height: 100%; }
.site-nav a, .site-nav .nav-label { position: relative; display: flex; align-items: center; height: 100%; font-size: 14px; font-weight: 600; }
.site-nav a::after { content: ""; position: absolute; right: 0; bottom: 0; left: 0; height: 3px; background: var(--blue); transform: scaleX(0); transition: transform .25s ease; }
.site-nav a:hover::after, .site-nav a.active::after { transform: scaleX(1); }
.site-nav .nav-label { cursor: default; }
.menu-toggle { display: none; width: 42px; height: 42px; padding: 10px; border: 0; background: transparent; cursor: pointer; }
.menu-toggle span { display: block; height: 2px; margin: 5px 0; background: var(--navy); transition: transform .2s; }

.hero { position: relative; height: clamp(440px, 58vh, 540px); margin-top: 78px; color: var(--white); overflow: hidden; }
.hero-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(33,56,73,.92) 0%, rgba(33,56,73,.72) 38%, rgba(33,56,73,.16) 72%, rgba(33,56,73,.05) 100%); }
.hero-content { position: relative; z-index: 2; width: min(1350px, calc(100% - 48px)); height: 100%; display: flex; justify-content: center; align-items: flex-start; flex-direction: column; margin: auto; }
.eyebrow { margin: 0 0 17px; font-size: 12px; font-weight: 700; letter-spacing: 2.2px; text-transform: uppercase; }
.eyebrow.blue { color: var(--blue); }
.hero h1 { max-width: 800px; margin: 0; font-size: clamp(48px, 6.2vw, 86px); font-weight: 500; line-height: 1.04; letter-spacing: 0; }
.hero-copy { max-width: 610px; margin: 38px 0 0; font-size: 18px; line-height: 1.55; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.button { min-height: 50px; display: inline-flex; align-items: center; gap: 20px; padding: 12px 22px; border: 1px solid rgba(255,255,255,.85); font-size: 14px; font-weight: 700; transition: background .2s, color .2s; }
.button-primary { color: var(--navy); background: var(--white); }
.button-primary:hover { color: var(--white); background: var(--blue); border-color: var(--blue); }
.button-ghost:hover { color: var(--navy); background: var(--white); }
.button-disabled { cursor: default; }
.button-disabled:hover { color: var(--navy); background: var(--white); border-color: rgba(255,255,255,.85); }
.hero-scroll { position: absolute; z-index: 2; bottom: 35px; left: 50%; width: 28px; height: 43px; border: 1px solid rgba(255,255,255,.7); border-radius: 20px; }
.hero-scroll span { position: absolute; top: 9px; left: 12px; width: 3px; height: 7px; border-radius: 3px; background: var(--white); animation: scroll 1.8s infinite; }
@keyframes scroll { 0% { transform: translateY(0); opacity: 1; } 75% { transform: translateY(15px); opacity: 0; } 100% { opacity: 0; } }

.business-section { --section-gap: 144px; padding: 105px max(24px, calc((100% - 1350px) / 2)); background: var(--white); }
.business-section { padding-bottom: 30px; }
.company-intro, .company-values { display: grid; gap: clamp(48px, 6vw, 88px); align-items: center; min-height: 360px; }
.company-intro { grid-template-columns: 1.28fr .72fr; margin-bottom: var(--section-gap); }
.company-values { grid-template-columns: .72fr 1.28fr; margin-bottom: var(--section-gap); }
.company-intro-image { height: 360px; overflow: hidden; }
.company-feature-image { height: 360px; overflow: hidden; }
.company-intro-image img, .company-feature-image img { width: 100%; height: 100%; object-fit: cover; object-position: center; }
.company-intro-copy, .company-feature-copy { padding: 0; }
.company-intro-copy h2, .company-feature-copy h2 { max-width: 720px; margin: 0 0 34px; color: var(--blue); font-size: clamp(36px, 3.5vw, 50px); font-weight: 500; line-height: 1.15; }
.company-intro-copy > p, .company-feature-copy > p { max-width: 720px; margin: 0 0 24px; color: var(--ink); font-size: 17px; line-height: 1.72; }
.company-intro-copy > p:last-child, .company-feature-copy > p:last-child { margin-bottom: 0; }
.company-feature-copy br { display: block; content: ""; margin-top: 22px; }
.product-section { margin-bottom: var(--section-gap); padding: 0; }
/* 四个首页内容板块共用统一间距，Why AIP 适当增高以增强页面饱满度。 */
.why-aip { --content-gutter: max(24px, calc((100vw - 1350px) / 2)); width: calc(100% + var(--content-gutter) + var(--content-gutter)); height: 420px; display: grid; grid-template-columns: .72fr 1.28fr; gap: clamp(55px, 7vw, 105px); align-items: center; margin-left: calc(-1 * var(--content-gutter)); padding: 58px var(--content-gutter); color: var(--ink); background: var(--white); }
.why-aip h2 { max-width: 560px; margin: 0; color: var(--blue); font-size: clamp(36px, 3.5vw, 50px); font-weight: 500; line-height: 1.15; }
.why-aip-heading { align-self: stretch; display: flex; justify-content: space-between; flex-direction: column; padding-right: 34px; border-right: 1px solid var(--line); }
.why-aip-stat { display: flex; align-items: center; gap: 16px; color: var(--navy); }
.why-aip-stat strong { color: var(--blue); font-size: 48px; font-weight: 500; line-height: 1; }
.why-aip-stat span { font-size: 12px; font-weight: 600; line-height: 1.45; }
.why-aip-content p { max-width: 820px; margin: 0 0 16px; font-size: 16px; line-height: 1.65; }
.why-aip-content p:last-of-type { margin-bottom: 22px; }
.why-aip-highlights { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 0; padding: 0; list-style: none; }
.why-aip-highlights li { display: flex; align-items: center; gap: 9px; min-height: 44px; padding: 9px 12px; background: var(--pale); font-size: 12px; font-weight: 700; }
.why-aip-highlights li span { width: 22px; height: 22px; display: inline-flex; flex: 0 0 22px; align-items: center; justify-content: center; color: var(--white); background: var(--blue); border-radius: 50%; font-size: 12px; }
.about-section { padding: 105px max(24px, calc((100% - 1350px) / 2)); }
.section-intro { display: grid; grid-template-columns: .5fr 1.35fr 1fr; gap: 45px; align-items: start; margin-bottom: 58px; }
.specializing-intro { display: block; margin-bottom: 38px; }
.specializing-intro .eyebrow { margin-bottom: 0; color: var(--blue); font-size: clamp(36px, 3.5vw, 50px); font-weight: 500; line-height: 1.15; letter-spacing: 0; text-transform: none; }
.section-intro h2, .about-lead h2, .contact-section h2 { margin: 0; font-size: clamp(35px, 4vw, 56px); font-weight: 500; line-height: 1.15; }
.section-intro > p:last-child { margin: 10px 0 0; color: var(--muted); font-size: 16px; }
.section-intro.specializing-intro > .eyebrow { margin: 0; color: var(--blue); font-size: clamp(36px, 3.5vw, 50px); font-weight: 500; line-height: 1.15; letter-spacing: 0; text-transform: none; }
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); }
.product-card { min-height: 520px; position: relative; padding: 34px 30px; border-right: 1px solid var(--line); overflow: hidden; transition: transform .25s, box-shadow .25s, background .25s; }
.product-card:last-child { border-right: 0; }
.product-card:hover { color: var(--white); background: var(--blue-dark); transform: translateY(-8px); box-shadow: 0 20px 45px rgba(33,56,73,.18); }
.product-index { margin: 12px 0 35px; font-size: 12px; font-weight: 700; opacity: .65; }
.product-card h3 { min-height: 66px; margin: 0 0 22px; font-size: 25px; line-height: 1.32; }
.product-card > p:not(.product-index) { margin: 0; color: var(--muted); font-size: 16px; line-height: 1.65; }
.product-card:hover > p { color: rgba(255,255,255,.78); }
.product-card .product-link { position: absolute; right: 30px; bottom: 30px; left: 30px; display: block; padding-top: 18px; border-top: 1px solid currentColor; font-size: 13px; font-weight: 700; }
.product-icon { width: 86px; height: 86px; position: relative; margin: 5px 0 22px; color: var(--blue); }
.product-card:hover .product-icon { color: var(--blue); }
.wafer-rings, .wafer-rings::before, .wafer-rings::after { position: absolute; border: 2px solid currentColor; border-radius: 50%; }
.wafer-rings { inset: 7px 16px 14px 7px; }
.wafer-rings::before { content: ""; inset: 9px; }.wafer-rings::after { content: ""; inset: 19px; }
.laser::before { content: ""; position: absolute; left: 3px; top: 31px; width: 50px; height: 25px; border: 2px solid currentColor; }
.laser::after { content: ""; position: absolute; left: 54px; top: 42px; width: 32px; border-top: 3px solid currentColor; box-shadow: 8px -9px 0 -1px currentColor, 8px 9px 0 -1px currentColor; }
.transceiver::before { content: ""; position: absolute; inset: 19px 8px 14px 4px; border: 2px solid currentColor; transform: skewY(-8deg); }
.transceiver::after { content: ""; position: absolute; left: 16px; top: 33px; width: 38px; height: 20px; border: 2px solid currentColor; }
.components::before { content: ""; position: absolute; inset: 15px; border: 2px solid currentColor; transform: rotate(45deg); }
.components::after { content: ""; position: absolute; top: 41px; left: 1px; width: 84px; border-top: 2px solid currentColor; box-shadow: 0 -14px 0 -1px currentColor, 0 14px 0 -1px currentColor; }

.about-section { padding-top: 90px; background: var(--pale); }
.about-lead { display: grid; grid-template-columns: 1.1fr 1fr; gap: 90px; padding-bottom: 74px; }
.about-lead > p { margin: 35px 0 0; color: var(--muted); font-size: 18px; }
.capability-layout { display: grid; grid-template-columns: 1.12fr .88fr; background: var(--white); }
.capability-image-wrap { min-height: 630px; position: relative; overflow: hidden; }
.capability-image-wrap > img { width: 100%; height: 100%; object-fit: cover; object-position: 46% center; }
.experience-badge { position: absolute; right: 0; bottom: 0; display: flex; align-items: center; gap: 18px; padding: 22px 30px; color: var(--white); background: var(--blue); }
.experience-badge strong { font-size: 40px; line-height: 1; }.experience-badge span { font-size: 12px; line-height: 1.4; }
.capability-copy { padding: 65px 58px; }
.capability-copy h3 { margin: 0 0 28px; font-size: 35px; font-weight: 500; line-height: 1.25; }
.capability-copy > p:not(.eyebrow) { color: var(--muted); font-size: 14px; }
.capability-stats { display: grid; grid-template-columns: repeat(3, 1fr); margin: 38px 0 0; padding-top: 28px; border-top: 1px solid var(--line); }
.capability-stats div { padding-right: 12px; }.capability-stats dt { color: var(--blue); font-size: 21px; font-weight: 700; }.capability-stats dd { margin: 3px 0 0; color: var(--muted); font-size: 11px; }
.value-band { display: grid; grid-template-columns: .5fr 1.5fr 1fr; gap: 45px; margin-top: 32px; padding: 62px; color: var(--white); background: var(--navy); }
.value-band blockquote { margin: 0; font-size: clamp(28px, 3vw, 42px); font-weight: 500; line-height: 1.28; }
.value-band > p:last-child { margin: 6px 0; color: rgba(255,255,255,.7); font-size: 14px; }
.detail-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 32px; background: var(--line); }
.detail-grid article { padding: 45px 38px; background: var(--white); }
.detail-number { color: var(--blue); font-size: 12px; font-weight: 700; }
.detail-grid h3 { margin: 28px 0 18px; font-size: 23px; line-height: 1.35; }
.detail-grid article > p:last-child { color: var(--muted); font-size: 14px; }

.contact-section { display: grid; grid-template-columns: 1.1fr .9fr; gap: 90px; padding: 100px max(24px, calc((100% - 1350px) / 2)); color: var(--navy); background: var(--blue); }
.contact-section h2 { max-width: 680px; }
.contact-copy { align-self: end; }.contact-copy > p:first-child { max-width: 520px; margin: 0 0 30px; font-size: 17px; }.location { padding-top: 22px; border-top: 1px solid rgba(33,56,73,.35); font-size: 13px; }
.location span { margin-right: 8px; font-size: 20px; }
.site-footer { padding: 55px max(24px, calc((100% - 1350px) / 2)) 28px; background: #f8fafb; }
.footer-top, .footer-bottom { display: flex; align-items: center; justify-content: space-between; }.footer-brand img { width: 175px; }.footer-top nav { display: flex; gap: 34px; font-size: 13px; font-weight: 700; }.footer-top nav a:hover { color: var(--blue); }.footer-top .nav-label { cursor: default; }
.footer-bottom { margin-top: 42px; padding-top: 22px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11px; }

@media (max-width: 980px) {
  .company-intro, .company-values { grid-template-columns: 1fr; gap: 40px; }.company-intro-image, .company-feature-image { height: 360px; min-height: 0; }.company-intro-copy, .company-feature-copy { padding: 0; }.why-aip { height: auto; min-height: 360px; grid-template-columns: 1fr; gap: 28px; }.why-aip-heading { gap: 35px; padding-right: 0; padding-bottom: 28px; border-right: 0; border-bottom: 1px solid var(--line); }
  .section-intro { grid-template-columns: 1fr 2fr; }.section-intro > p:last-child { grid-column: 2; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }.product-card { min-height: 460px; border-bottom: 1px solid var(--line); }.product-card:nth-child(2) { border-right: 0; }
  .about-lead, .capability-layout { grid-template-columns: 1fr; }.capability-image-wrap { min-height: 500px; }.about-lead { gap: 25px; }
  .value-band { grid-template-columns: 1fr 2fr; }.value-band > p:last-child { grid-column: 2; }
  .detail-grid { grid-template-columns: 1fr; }.contact-section { gap: 45px; }
}

@media (max-width: 700px) {
  .site-header { height: 68px; }.header-inner { width: calc(100% - 32px); }.brand img { width: 180px; height: 46px; }
  .menu-toggle { display: block; }.site-nav { position: absolute; top: 68px; right: 0; left: 0; height: auto; display: none; align-items: stretch; flex-direction: column; gap: 0; padding: 10px 24px 22px; background: var(--white); border-bottom: 1px solid var(--line); }.site-nav.open { display: flex; }.site-nav a, .site-nav .nav-label { height: 48px; border-bottom: 1px solid var(--line); }.site-nav a::after { display: none; }
  .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); }
  .hero { height: 400px; margin-top: 68px; }.hero-image { object-position: center; }.hero-shade { background: linear-gradient(90deg, rgba(33,56,73,.92), rgba(33,56,73,.45)); }.hero-content { width: calc(100% - 40px); }.hero h1 { font-size: 45px; }.hero-copy { max-width: 340px; margin-top: 28px; font-size: 15px; }
  .business-section { --section-gap: 100px; padding: 75px 20px 15px; }.company-intro, .company-values { gap: 30px; min-height: 0; }.company-intro, .company-values { margin-bottom: var(--section-gap); }.company-intro-image, .company-feature-image { height: 260px; }.company-intro-copy h2, .company-feature-copy h2 { margin-bottom: 28px; font-size: 32px; }.company-intro-copy > p, .company-feature-copy > p { margin-bottom: 20px; font-size: 16px; line-height: 1.68; }.specializing-intro .eyebrow, .why-aip h2 { font-size: 32px; }.product-section { margin-bottom: var(--section-gap); }.product-card { min-height: 450px; padding: 30px 25px; }.product-card h3 { min-height: auto; font-size: 23px; }.product-card > p:not(.product-index) { font-size: 15px; }.product-card .product-link { right: 25px; bottom: 25px; left: 25px; }.why-aip { height: auto; min-height: 400px; gap: 22px; padding: 54px 20px; }.why-aip-heading { gap: 28px; padding-bottom: 24px; }.why-aip-stat strong { font-size: 42px; }.why-aip-content p { font-size: 16px; line-height: 1.68; }.why-aip-highlights { grid-template-columns: 1fr; }.why-aip-highlights li { min-height: 42px; }
  .about-section { padding: 75px 20px; }.section-intro, .about-lead, .value-band, .contact-section { grid-template-columns: 1fr; }.section-intro { gap: 18px; }.section-intro > p:last-child, .value-band > p:last-child { grid-column: auto; }.section-intro h2, .about-lead h2, .contact-section h2 { font-size: 37px; }
  .product-grid { grid-template-columns: 1fr; }.product-card { min-height: 410px; border-right: 0; }
  .about-lead { padding-bottom: 45px; }.about-lead > p { margin-top: 10px; font-size: 16px; }.capability-image-wrap { min-height: 420px; }.experience-badge { padding: 17px 20px; }.capability-copy { padding: 42px 25px; }.capability-copy h3 { font-size: 29px; }.capability-stats { gap: 9px; }.capability-stats dt { font-size: 17px; }
  .value-band { gap: 18px; padding: 42px 25px; }.value-band blockquote { font-size: 29px; }.detail-grid article { padding: 35px 25px; }
  .contact-section { gap: 28px; padding: 70px 24px; }.footer-top, .footer-bottom { align-items: flex-start; flex-direction: column; gap: 22px; }.footer-top nav { flex-wrap: wrap; gap: 18px 26px; }.footer-bottom { gap: 6px; }.footer-bottom p { margin: 0; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation: none !important; transition: none !important; } }