:root {
  --navy: #0b1f33;
  --navy-2: #123a5a;
  --blue: #2e7fa6;
  --cyan: #66bed1;
  --copper: #c47e4c;
  --green: #5e8b7e;
  --ink: #14283a;
  --gray: #617384;
  --line: #d7e1e7;
  --pale: #f3f6f7;
  --white: #fff;
  --shadow: 0 20px 60px rgba(11, 31, 51, .10);
  --radius: 24px;
  --container: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 86px; }
body { margin: 0; color: var(--ink); background: var(--white); font-family: "Microsoft YaHei", "Noto Sans SC", "PingFang SC", "Segoe UI", sans-serif; line-height: 1.7; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
::selection { background: rgba(102, 190, 209, .35); }
:focus-visible { outline: 3px solid rgba(102, 190, 209, .7); outline-offset: 3px; }
.progress { position: fixed; inset: 0 auto auto 0; width: 0; height: 3px; z-index: 1000; background: linear-gradient(90deg, var(--cyan), var(--copper)); }
.container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; color: var(--blue); font-size: 13px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 26px; height: 2px; background: currentColor; }
.section { padding: 96px 0; }
.section-pale { background: var(--pale); }
.section-dark { color: var(--white); background: var(--navy); }
.section-head { max-width: 760px; margin-bottom: 46px; }
.section-head h2 { margin: 12px 0 14px; color: var(--navy); font-size: clamp(30px, 4vw, 48px); line-height: 1.18; letter-spacing: -.02em; }
.section-dark .section-head h2 { color: var(--white); }
.section-head p { margin: 0; color: var(--gray); font-size: 16px; }
.section-dark .section-head p { color: #bfd0db; }
.header { position: fixed; inset: 0 0 auto 0; z-index: 900; padding: 16px 0; color: var(--white); transition: background .28s ease, padding .28s ease, box-shadow .28s ease; }
.header.scrolled { padding: 10px 0; color: var(--navy); background: rgba(255, 255, 255, .94); box-shadow: 0 10px 35px rgba(11, 31, 51, .08); backdrop-filter: blur(16px); }
.nav-wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.brand-mark { width: 42px; height: 42px; flex: 0 0 auto; }
.brand-text { min-width: 0; }
.brand strong { display: block; font-size: 15px; letter-spacing: .04em; white-space: nowrap; }
.brand small { display: block; margin-top: 1px; color: var(--cyan); font-size: 9px; letter-spacing: .12em; white-space: nowrap; }
.header.scrolled .brand small { color: var(--blue); }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a { position: relative; padding: 9px 13px; border-radius: 999px; font-size: 14px; font-weight: 700; transition: background .2s ease, color .2s ease; }
.nav a:hover, .nav a.active { background: rgba(102, 190, 209, .14); color: var(--cyan); }
.header.scrolled .nav a:hover, .header.scrolled .nav a.active { color: var(--blue); }
.menu-toggle { display: none; width: 44px; height: 44px; border: 1px solid currentColor; border-radius: 50%; color: inherit; background: transparent; cursor: pointer; }
.menu-toggle span, .menu-toggle::before, .menu-toggle::after { content: ""; display: block; width: 18px; height: 2px; margin: 5px auto; background: currentColor; transition: transform .25s ease, opacity .25s ease; }
.menu-toggle.active span { opacity: 0; }
.menu-toggle.active::before { transform: translateY(7px) rotate(45deg); }
.menu-toggle.active::after { transform: translateY(-7px) rotate(-45deg); }
.hero { position: relative; min-height: 760px; display: grid; align-items: center; overflow: hidden; color: var(--white); background: radial-gradient(circle at 82% 18%, rgba(46, 127, 166, .42), transparent 34%), linear-gradient(140deg, #0b1f33 0%, #102c46 58%, #0b1f33 100%); }
.hero::before { content: ""; position: absolute; inset: 0; opacity: .16; background-image: linear-gradient(rgba(255,255,255,.12) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.12) 1px, transparent 1px); background-size: 42px 42px; mask-image: linear-gradient(to bottom, #000, transparent 90%); }
.hero::after { content: ""; position: absolute; width: 640px; height: 640px; right: -230px; top: 40px; border: 1px solid rgba(102,190,209,.28); border-radius: 50%; box-shadow: inset 0 0 0 70px rgba(102,190,209,.035), inset 0 0 0 150px rgba(102,190,209,.025); animation: breathe 8s ease-in-out infinite; }
@keyframes breathe { 50% { transform: scale(1.045); opacity: .75; } }
.hero .container { position: relative; z-index: 2; padding-top: 130px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(310px, .8fr); gap: 60px; align-items: center; }
.hero-copy .eyebrow { color: var(--cyan); }
.hero h1 { max-width: 820px; margin: 18px 0 22px; font-size: clamp(42px, 6.1vw, 76px); line-height: 1.08; letter-spacing: -.045em; }
.hero h1 span { color: var(--cyan); }
.hero-copy p { max-width: 700px; margin: 0; color: #c5d4df; font-size: clamp(16px, 2vw, 19px); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 50px; padding: 0 24px; border: 1px solid transparent; border-radius: 999px; font-weight: 800; transition: transform .2s ease, background .2s ease, border-color .2s ease, color .2s ease; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { color: var(--navy); background: var(--cyan); }
.btn-primary:hover { background: #8bd1df; }
.btn-ghost { color: var(--white); border-color: rgba(255,255,255,.34); background: rgba(255,255,255,.04); }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }
.btn-copper { color: var(--white); background: var(--copper); }
.btn-copper:hover { background: #d59262; }
.hero-visual { position: relative; min-height: 420px; display: grid; place-items: center; }
.ring-art { width: min(100%, 400px); aspect-ratio: 1; position: relative; filter: drop-shadow(0 30px 60px rgba(0,0,0,.25)); }
.ring-art svg { width: 100%; height: 100%; animation: float 7s ease-in-out infinite; }
@keyframes float { 50% { transform: translateY(-12px) rotate(3deg); } }
.hero-badge { position: absolute; left: 0; bottom: 30px; width: 190px; padding: 18px; border: 1px solid rgba(255,255,255,.14); border-radius: 18px; background: rgba(255,255,255,.08); backdrop-filter: blur(14px); }
.hero-badge strong { display: block; color: var(--cyan); font-size: 26px; line-height: 1; }
.hero-badge span { display: block; margin-top: 8px; color: #c7d6df; font-size: 12px; }
.metrics { position: relative; z-index: 5; margin-top: 64px; display: grid; grid-template-columns: repeat(5, 1fr); overflow: hidden; border: 1px solid rgba(255,255,255,.13); border-radius: 20px; background: rgba(255,255,255,.07); backdrop-filter: blur(12px); }
.metric { padding: 22px 20px; border-right: 1px solid rgba(255,255,255,.12); }
.metric:last-child { border-right: 0; }
.metric strong { display: block; color: var(--white); font-size: 25px; line-height: 1.1; }
.metric span { display: block; margin-top: 8px; color: #b9cbd7; font-size: 12px; }
.about-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 60px; align-items: start; }
.about-story p { margin: 0 0 18px; color: var(--gray); font-size: 16px; }
.fact-panel { padding: 34px; border-radius: var(--radius); color: var(--white); background: var(--navy); box-shadow: var(--shadow); }
.fact-panel .overline { color: var(--cyan); font-size: 13px; font-weight: 800; letter-spacing: .1em; }
.fact-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px 20px; margin-top: 28px; }
.fact strong { display: block; color: var(--white); font-size: 28px; line-height: 1.15; }
.fact span { display: block; margin-top: 5px; color: #b8cad6; font-size: 13px; }
.capability-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 42px; }
.capability { padding: 26px; border: 1px solid var(--line); border-radius: 20px; background: var(--white); transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease; }
.capability:hover { transform: translateY(-5px); border-color: rgba(46,127,166,.36); box-shadow: var(--shadow); }
.capability .icon, .quality-card .icon, .industry .icon { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 15px; color: var(--blue); background: #e8f2f6; }
.capability h3, .quality-card h3 { margin: 20px 0 8px; font-size: 18px; }
.capability p, .quality-card p { margin: 0; color: var(--gray); font-size: 14px; }
.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.product { position: relative; min-height: 250px; overflow: hidden; padding: 28px; border: 1px solid var(--line); border-radius: 22px; background: var(--white); transition: transform .25s ease, box-shadow .25s ease; }
.product::after { content: ""; position: absolute; width: 130px; height: 130px; right: -55px; bottom: -55px; border: 1px solid rgba(46,127,166,.16); border-radius: 50%; box-shadow: 0 0 0 22px rgba(46,127,166,.035), 0 0 0 44px rgba(46,127,166,.025); }
.product:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.product .icon { width: 64px; height: 64px; color: var(--blue); }
.product:nth-child(2n) .icon { color: var(--copper); }
.product h3 { position: relative; z-index: 1; margin: 24px 0 10px; font-size: 19px; line-height: 1.4; }
.product p { position: relative; z-index: 1; margin: 0; color: var(--gray); font-size: 14px; }
.product .tag { position: absolute; right: 22px; top: 22px; color: #a7b5bf; font-size: 11px; font-weight: 800; letter-spacing: .12em; }
.industry-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.industry { padding: 26px 18px; text-align: center; border: 1px solid rgba(255,255,255,.12); border-radius: 18px; background: rgba(255,255,255,.055); transition: transform .25s ease, background .25s ease; }
.industry:hover { transform: translateY(-5px); background: rgba(255,255,255,.09); }
.industry .icon { margin: 0 auto; color: var(--cyan); background: rgba(102,190,209,.12); }
.industry strong { display: block; margin-top: 18px; color: var(--white); font-size: 15px; }
.industry span { display: block; margin-top: 7px; color: #afc2ce; font-size: 12px; }
.quality-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.quality-card { padding: 30px; border: 1px solid var(--line); border-radius: 22px; background: var(--white); }
.quote { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 28px; margin-top: 8px; padding: 34px; border-radius: 22px; color: var(--white); background: linear-gradient(120deg, var(--navy), var(--navy-2)); }
.quote strong { font-size: clamp(20px, 3vw, 30px); line-height: 1.4; }
.quote span { padding: 0 24px; color: var(--cyan); font-size: 13px; border-inline: 1px solid rgba(255,255,255,.2); }
.quote em { color: var(--copper); font-size: clamp(18px, 2.5vw, 26px); font-style: normal; font-weight: 800; }
.market-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.market-card { padding: 36px; border-radius: 24px; background: var(--white); border: 1px solid var(--line); }
.market-card .num { color: var(--blue); font-size: 12px; font-weight: 900; letter-spacing: .14em; }
.market-card h3 { margin: 16px 0 12px; font-size: 24px; }
.market-card p { margin: 0; color: var(--gray); }
.market-card.dark { color: var(--white); background: var(--navy); border-color: var(--navy); }
.market-card.dark .num { color: var(--cyan); }
.market-card.dark p { color: #bdced9; }
.market-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.market-tags span { padding: 8px 14px; border: 1px solid rgba(255,255,255,.16); border-radius: 999px; color: #dce6ec; font-size: 12px; }
.contact { position: relative; overflow: hidden; background: var(--pale); }
.contact::before { content: ""; position: absolute; right: -120px; top: -120px; width: 420px; height: 420px; border: 1px solid rgba(46,127,166,.16); border-radius: 50%; box-shadow: 0 0 0 60px rgba(46,127,166,.025), 0 0 0 120px rgba(46,127,166,.018); }
.contact-grid { position: relative; display: grid; grid-template-columns: .85fr 1.15fr; gap: 48px; align-items: center; }
.contact h2 { margin: 12px 0 16px; color: var(--navy); font-size: clamp(32px, 4.4vw, 52px); line-height: 1.15; }
.contact-copy p { margin: 0; color: var(--gray); }
.contact-panel { padding: 34px; border-radius: 26px; background: var(--white); box-shadow: var(--shadow); }
.contact-row { display: grid; grid-template-columns: 92px 1fr; gap: 18px; padding: 17px 0; border-bottom: 1px solid var(--line); }
.contact-row:last-of-type { border-bottom: 0; }
.contact-row span { color: var(--gray); font-size: 13px; }
.contact-row strong { color: var(--navy); font-size: 16px; word-break: break-word; }
.contact-actions { display: flex; gap: 12px; margin-top: 22px; }
.footer { padding: 36px 0; color: #9cb0be; background: #081827; }
.footer-grid { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.footer-brand { display: flex; align-items: center; gap: 12px; color: var(--white); }
.footer-brand svg { width: 34px; height: 34px; }
.footer p { margin: 0; font-size: 12px; }
.top-btn { position: fixed; right: 24px; bottom: 24px; z-index: 800; width: 46px; height: 46px; border: 0; border-radius: 50%; color: var(--white); background: var(--navy); box-shadow: 0 12px 30px rgba(11,31,51,.22); cursor: pointer; opacity: 0; transform: translateY(20px); pointer-events: none; transition: opacity .25s ease, transform .25s ease, background .25s ease; }
.top-btn.show { opacity: 1; transform: translateY(0); pointer-events: auto; }
.top-btn:hover { background: var(--blue); }
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (max-width: 980px) {
  .hero-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
  .hero .container { padding-top: 150px; padding-bottom: 70px; }
  .hero-visual { min-height: 340px; }
  .ring-art { width: 320px; }
  .metrics { grid-template-columns: repeat(3, 1fr); }
  .metric:nth-child(3) { border-right: 0; }
  .metric:nth-child(n+4) { border-top: 1px solid rgba(255,255,255,.12); }
  .products-grid, .quality-grid { grid-template-columns: repeat(2, 1fr); }
  .capability-list { grid-template-columns: repeat(2, 1fr); }
  .industry-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 720px) {
  .container { width: min(calc(100% - 28px), var(--container)); }
  .section { padding: 72px 0; }
  .header { padding: 10px 0; }
  .nav { position: absolute; left: 14px; right: 14px; top: 72px; display: grid; gap: 2px; padding: 12px; border-radius: 18px; color: var(--navy); background: rgba(255,255,255,.98); box-shadow: 0 20px 50px rgba(11,31,51,.16); opacity: 0; transform: translateY(-8px); pointer-events: none; transition: opacity .22s ease, transform .22s ease; }
  .nav.open { opacity: 1; transform: none; pointer-events: auto; }
  .nav a { padding: 12px 14px; border-radius: 12px; }
  .menu-toggle { display: block; }
  .brand strong { font-size: 13px; }
  .brand small { font-size: 8px; }
  .hero h1 { font-size: clamp(36px, 12vw, 54px); }
  .hero-badge { left: 0; bottom: 0; }
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .metric:nth-child(3) { border-right: 1px solid rgba(255,255,255,.12); }
  .metric:nth-child(2n) { border-right: 0; }
  .metric:nth-child(n+3) { border-top: 1px solid rgba(255,255,255,.12); }
  .products-grid, .quality-grid, .capability-list, .market-grid { grid-template-columns: 1fr; }
  .industry-grid { grid-template-columns: repeat(2, 1fr); }
  .quote { grid-template-columns: 1fr; text-align: center; }
  .quote span { padding: 14px 0; border: 0; border-block: 1px solid rgba(255,255,255,.2); }
  .footer-grid { flex-direction: column; align-items: flex-start; }
  .contact-actions { flex-direction: column; }
  .btn { 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; }
}