:root{
  --blue:#1675a8;
  --cyan:#69c8df;
  --deep:#082f4b;
  --deep-2:#0a496d;
  --ink:#173447;
  --muted:#607584;
  --line:#d9e6ed;
  --pale:#f3f8fb;
  --white:#fff;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:104px}
body{margin:0;color:var(--ink);background:#fff;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
img{max-width:100%}
.site-shell{width:min(1180px,calc(100% - 48px));margin:0 auto}

.site-header{position:sticky;top:0;z-index:100;height:88px;background:#fff;border-bottom:1px solid rgba(10,62,94,.12);box-shadow:0 4px 16px rgba(7,47,75,.055)}
.header-inner{height:100%;display:flex;align-items:center;justify-content:space-between;gap:32px}
.brand img{display:block;width:138px;height:auto}
.main-nav{display:flex;align-items:center;gap:29px}
.main-nav a{position:relative;padding:34px 0 31px;color:#2a4252;font-size:15px;font-weight:600;white-space:nowrap}
.main-nav a:after{content:"";position:absolute;left:0;right:0;bottom:21px;height:2px;background:var(--blue);transform:scaleX(0);transition:.2s}
.main-nav a:hover,.main-nav a.active{color:var(--blue)}
.main-nav a:hover:after,.main-nav a.active:after{transform:scaleX(1)}

.product-hero{position:relative;min-height:850px;padding:105px 0 0;color:#fff;background:linear-gradient(122deg,#062b45 0%,#084463 54%,#0b5b7e 100%);overflow:hidden}
.hero-grid{position:absolute;inset:0;opacity:.17;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:64px 64px;mask-image:linear-gradient(90deg,transparent 0%,#000 47%,#000 100%)}
.hero-orbit{position:absolute;border:1px solid rgba(128,220,241,.23);border-radius:50%;pointer-events:none}
.hero-orbit-a{width:630px;height:630px;right:-150px;top:-265px;box-shadow:0 0 0 105px rgba(111,209,231,.035),0 0 0 210px rgba(111,209,231,.02)}
.hero-orbit-b{width:340px;height:340px;right:8%;bottom:-220px;border-style:dashed}
.hero-layout{position:relative;z-index:2;display:grid;grid-template-columns:1.12fr .88fr;align-items:center;gap:76px}
.eyebrow{margin:0 0 19px;color:#9ddcec;font-size:14px;font-weight:700;letter-spacing:.15em}
.hero-copy h1{margin:0;color:#fff;font-size:clamp(45px,4.3vw,60px);line-height:1.16;letter-spacing:-.038em}
.hero-copy h1 span{display:inline-block;margin-top:9px;font-size:.72em;letter-spacing:-.025em;white-space:nowrap}
.hero-lead{max-width:705px;margin:27px 0 0;color:rgba(255,255,255,.8);font-size:17px;line-height:2}
.hero-actions,.match-actions{display:flex;gap:14px;margin-top:32px}
.btn{display:inline-flex;min-height:49px;padding:0 25px;align-items:center;justify-content:center;border:1px solid transparent;border-radius:3px;font-size:15px;font-weight:700;transition:.2s}
.btn-white{background:#fff;color:var(--deep)}
.btn-white:hover{background:#def3f9}
.btn-outline{border-color:rgba(255,255,255,.68);color:#fff}
.btn-outline:hover{background:rgba(255,255,255,.1)}

.hero-selector{position:relative;padding:18px 18px 18px 60px;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.07);backdrop-filter:blur(8px)}
.hero-selector a{position:relative;display:grid;grid-template-columns:60px 1fr auto;align-items:center;gap:17px;min-height:86px;padding:8px 13px;border-bottom:1px solid rgba(255,255,255,.14);transition:.2s}
.hero-selector a:last-child{border-bottom:0}
.hero-selector a:hover{background:rgba(255,255,255,.08)}
.hero-selector a>strong{font-size:38px;font-weight:300;color:#8bd8eb}
.hero-selector b,.hero-selector small{display:block}
.hero-selector b{margin-bottom:6px;font-size:16px;color:#fff}
.hero-selector small{font-size:12px;color:rgba(255,255,255,.55)}
.hero-selector em{font-style:normal;color:rgba(255,255,255,.34);font-size:12px}
.selector-axis{position:absolute;left:29px;top:55px;bottom:55px;width:1px;background:rgba(132,220,240,.42)}
.selector-axis i{position:absolute;left:-4px;width:9px;height:9px;border:1px solid #8bd8eb;border-radius:50%;background:#0a4c6c}
.selector-axis i:nth-child(1){top:0}.selector-axis i:nth-child(2){top:33.333%}.selector-axis i:nth-child(3){top:66.666%}.selector-axis i:nth-child(4){bottom:0}

.hero-summary{position:relative;z-index:3;display:grid;grid-template-columns:repeat(3,1fr);margin-top:73px;border-top:1px solid rgba(255,255,255,.2);border-bottom:1px solid rgba(255,255,255,.2)}
.hero-summary article{min-height:120px;padding:25px 28px;border-right:1px solid rgba(255,255,255,.17)}
.hero-summary article:first-child{padding-left:0}.hero-summary article:last-child{border-right:0}
.hero-summary span,.hero-summary strong{display:block}
.hero-summary span{margin-bottom:11px;color:#81d4e8;font-size:12px;font-weight:700;letter-spacing:.1em}
.hero-summary strong{font-size:16px;line-height:1.6}

.section{position:relative;padding:108px 0;overflow:hidden}
.section-head{position:relative;z-index:2;max-width:850px;margin-bottom:49px}
.section-index{display:flex;align-items:center;gap:11px;margin:0 0 14px;color:var(--blue);font-size:15px;font-weight:700;letter-spacing:.1em}
.section-index span{display:inline-flex;width:36px;height:25px;align-items:center;justify-content:center;color:#fff;background:var(--blue);font-size:12px;letter-spacing:0}
.section-head h2,.platform-copy h2,.match-layout h2{margin:0;color:var(--deep);font-size:clamp(36px,4vw,49px);line-height:1.25;letter-spacing:-.025em}
.section-head>p:last-child{margin:18px 0 0;color:var(--muted);font-size:18px;line-height:1.85}

.selection{background:linear-gradient(180deg,#fff 0%,#f7fafc 100%)}
.selection-lines{position:absolute;right:-40px;top:24px;width:680px;opacity:.28;pointer-events:none}
.selection-lines svg{display:block;width:100%}
.selection-lines path,.selection-lines circle{fill:none;stroke:#72bcd4;stroke-width:1.25;vector-effect:non-scaling-stroke}
.selection-lines circle{fill:#fff;stroke:#2d91b8;stroke-width:1.6}
.selection-grid{position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line);background:rgba(255,255,255,.92);box-shadow:0 15px 48px rgba(7,47,75,.055)}
.selection-grid>a{position:relative;min-height:430px;padding:31px 27px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);transition:.22s;overflow:hidden}
.selection-grid>a:after{content:"";position:absolute;right:-65px;bottom:-65px;width:145px;height:145px;border:1px solid #d5eaf1;border-radius:50%;transition:.25s}
.selection-grid>a:hover{z-index:2;transform:translateY(-5px);background:#f7fbfd;box-shadow:0 18px 35px rgba(7,47,75,.09)}
.selection-grid>a:hover:after{transform:scale(1.16);border-color:#8bcde0}
.selection-no{position:absolute;right:23px;top:22px;color:#98aeb9;font-size:12px}
.selection-mark{display:flex;width:69px;height:69px;align-items:center;justify-content:center;margin:0 0 29px;border:1px solid #b8dbe7;border-radius:50%;color:var(--blue);background:#edf7fa;font-size:30px;font-weight:300}
.selection-grid h3{margin:0 0 15px;color:var(--deep);font-size:21px;line-height:1.45}
.selection-grid p{min-height:81px;margin:0;color:var(--muted);font-size:15px;line-height:1.8}
.selection-impact{min-height:70px;margin-top:22px;padding-top:16px;border-top:1px solid #e0eaef}
.selection-impact span,.selection-impact b{display:block}
.selection-impact span{margin-bottom:6px;color:#7893a1;font-size:11px;font-weight:700;letter-spacing:.08em}
.selection-impact b{color:#385d72;font-size:13px;font-weight:600;line-height:1.55}
.selection-impact.impact-accent{padding:16px 15px 12px;border-top:0;border-left:3px solid var(--blue);background:#e9f4f8}
.selection-impact.impact-accent span{color:var(--blue)}
.selection-grid>a>strong{position:absolute;left:27px;bottom:29px;color:var(--blue);font-size:14px}
.selection-note{position:relative;z-index:2;margin:24px 0 0;padding:18px 23px;border-left:3px solid var(--blue);background:#eaf4f8;color:#526e7e;font-size:14px;line-height:1.7}

.platform-section{min-height:780px;display:flex;align-items:center;background:#fff}
.platform-a{background:var(--pale)}
.platform-layout{position:relative;z-index:2;display:grid;grid-template-columns:.92fr 1.08fr;align-items:center;gap:76px}
.reverse-layout .product-stage{order:2}.reverse-layout .platform-copy{order:1}
.product-stage{position:relative;height:510px;border:1px solid #d7e5ec;background:#fff;box-shadow:0 18px 50px rgba(7,47,75,.07);overflow:hidden}
.product-stage:before{content:"";position:absolute;left:7%;right:7%;bottom:61px;height:1px;background:linear-gradient(90deg,transparent,#b9dbe6 20%,#b9dbe6 80%,transparent)}
.product-stage:after{content:"";position:absolute;left:50%;bottom:43px;width:66%;height:22px;border-radius:50%;background:rgba(18,70,99,.08);filter:blur(13px);transform:translateX(-50%)}
.stage-corner{position:absolute;z-index:5;left:0;top:0;width:96px;height:96px;background:linear-gradient(145deg,#0a557f,#1780b3);clip-path:polygon(0 0,100% 0,0 100%);filter:drop-shadow(5px 6px 10px rgba(8,47,75,.12))}
.stage-corner span{position:absolute;left:18px;top:13px;color:#fff;font-size:31px;font-weight:500;line-height:1}
.stage-grid{position:absolute;inset:0;opacity:.55;background-image:linear-gradient(#edf4f7 1px,transparent 1px),linear-gradient(90deg,#edf4f7 1px,transparent 1px);background-size:46px 46px;mask-image:linear-gradient(145deg,#000 0%,transparent 72%)}
.product-crop{position:absolute;z-index:2;left:50%;top:38px;width:72%;max-width:370px;height:375px;overflow:hidden;transform:translateX(-50%)}
.product-crop img{position:absolute;left:50%;top:-75px;width:auto;height:420px;max-width:none}
.crop-p img{transform:translateX(-21%)}
.crop-x img{transform:translateX(-79%)}
.crop-a img{transform:translateX(-21%)}
.crop-c{top:25px;width:86%;max-width:445px;height:415px}
.crop-c img{top:-140px;height:580px;transform:translateX(-82%)}
.product-stage>p{position:absolute;z-index:3;left:27px;bottom:20px;margin:0;color:#7c9aaa;font-size:11px;font-weight:700;letter-spacing:.15em}
.platform-copy{position:relative}
.platform-en{margin:0 0 10px;color:#7aa8bc;font-size:11px;font-weight:700;letter-spacing:.15em}
.platform-copy h2{font-size:clamp(35px,3.5vw,47px)}
.platform-copy h3{margin:19px 0 16px;color:#286b8e;font-size:22px;line-height:1.45}
.platform-lead{margin:0;color:var(--muted);font-size:16px;line-height:1.9}
.spec-grid{display:grid;grid-template-columns:repeat(2,1fr);margin-top:27px;border-top:1px solid var(--line);border-left:1px solid var(--line)}
.spec-grid article{min-height:91px;padding:17px 18px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(255,255,255,.66)}
.spec-grid span,.spec-grid strong{display:block}
.spec-grid span{margin-bottom:7px;color:#7091a2;font-size:12px}
.spec-grid strong{color:var(--deep);font-size:15px;line-height:1.45}
.project-fit{display:grid;grid-template-columns:80px 1fr;gap:15px;margin-top:23px;padding:18px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.project-fit span{color:var(--blue);font-size:13px;font-weight:700}
.project-fit p{margin:0;color:#5c7381;font-size:14px;line-height:1.75}
.text-link{display:inline-block;margin-top:24px;color:var(--blue);font-size:15px;font-weight:700;border-bottom:1px solid rgba(22,117,168,.3);padding-bottom:4px}

.platform-decoration{position:absolute;right:0;top:74px;width:31%;height:230px;opacity:.42}
.platform-decoration:before,.platform-decoration:after{content:"";position:absolute;border:1px solid #9bcfdd;border-radius:50%}
.platform-decoration:before{right:-70px;top:-110px;width:330px;height:330px}
.platform-decoration:after{right:29px;top:-30px;width:168px;height:168px;border-style:dashed}
.platform-decoration i{position:absolute;right:0;height:1px;background:#9bcfdd}
.platform-decoration i:nth-child(1){top:54px;width:84%}.platform-decoration i:nth-child(2){top:88px;width:65%}.platform-decoration i:nth-child(3){top:122px;width:45%}
.platform-decoration span{position:absolute;right:84%;top:50px;width:8px;height:8px;border:1px solid #3a98bb;border-radius:50%;background:#fff}
.decoration-a{left:0;right:auto;transform:scaleX(-1)}

.dark-platform{color:#fff;background:linear-gradient(132deg,#072d47 0%,#0a496c 100%)}
.dark-orbit{position:absolute;border:1px solid rgba(123,214,234,.13);border-radius:50%}
.dark-orbit-a{width:610px;height:610px;left:-270px;bottom:-350px;box-shadow:0 0 0 95px rgba(109,207,229,.026)}
.dark-orbit-b{width:330px;height:330px;right:-90px;top:-165px;border-style:dashed}
.dark-platform .section-index{color:#fff}.dark-platform .section-index span{background:rgba(255,255,255,.14)}
.dark-platform .platform-en{color:#83d2e5}
.dark-platform .platform-copy h2{color:#fff}
.dark-platform .platform-copy h3{color:#a5deea}
.dark-platform .platform-lead{color:rgba(255,255,255,.7)}
.dark-platform .spec-grid{border-color:rgba(255,255,255,.16)}
.dark-platform .spec-grid article{border-color:rgba(255,255,255,.16);background:rgba(255,255,255,.055)}
.dark-platform .spec-grid span{color:#85b5c8}
.dark-platform .spec-grid strong{color:#fff}
.dark-platform .project-fit{border-color:rgba(255,255,255,.16)}
.dark-platform .project-fit span,.dark-platform .text-link{color:#91d8e8}
.dark-platform .project-fit p{color:rgba(255,255,255,.66)}
.dark-platform .text-link{border-color:rgba(145,216,232,.35)}
.dark-stage{border-color:rgba(255,255,255,.23);box-shadow:0 22px 55px rgba(0,0,0,.18)}

.project-match{background:linear-gradient(180deg,#fff,#f2f8fb)}
.match-layout{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:85px;align-items:start}
.match-layout h2{font-size:clamp(36px,3.4vw,43px)}
.match-layout>div:first-child>p:last-child{margin:22px 0 0;color:var(--muted);font-size:17px;line-height:1.9}
.match-inputs{padding:32px 34px;border:1px solid var(--line);background:rgba(255,255,255,.88);box-shadow:0 15px 45px rgba(7,47,75,.06)}
.match-inputs>p{margin:0 0 20px;color:var(--deep);font-size:19px;font-weight:700}
.match-inputs ul{display:grid;grid-template-columns:repeat(2,1fr);gap:0;margin:0;padding:0;list-style:none;border-top:1px solid var(--line);border-left:1px solid var(--line)}
.match-inputs li{padding:13px 14px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);color:#586f7c;font-size:14px}
.match-actions{margin-top:25px}
.btn-blue{background:var(--blue);color:#fff}.btn-blue:hover{background:#0e608e}
.btn-line{border-color:#9dbfce;color:var(--deep)}.btn-line:hover{background:#edf6f9}
.match-graphic{position:absolute;left:-30px;bottom:0;width:400px;opacity:.27}
.match-graphic svg{display:block;width:100%}
.match-graphic path,.match-graphic circle{fill:none;stroke:#5aabc7;stroke-width:1.3;vector-effect:non-scaling-stroke}
.match-graphic circle{fill:#fff;stroke:#2d8fb5}

.site-footer{padding:56px 0 20px;background:#06283d;color:#fff}
.footer-main{display:flex;justify-content:space-between;gap:60px;padding-bottom:40px}
.footer-brand img{width:150px;filter:brightness(0) invert(1);margin-bottom:20px}
.footer-brand h2{margin:0 0 9px;color:#fff;font-size:20px}
.footer-brand p{margin:0;color:rgba(255,255,255,.6);font-size:14px}
.footer-nav{display:grid;grid-template-columns:repeat(3,auto);gap:17px 32px;align-content:start}
.footer-nav a{color:rgba(255,255,255,.72);font-size:14px}.footer-nav a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;padding-top:18px;border-top:1px solid rgba(255,255,255,.13);color:rgba(255,255,255,.45);font-size:12px}
.footer-bottom a{color:inherit}

@media(max-width:1100px){
  .main-nav{gap:17px}.main-nav a{font-size:13px}
  .hero-layout{grid-template-columns:1fr;gap:50px}.product-hero{min-height:auto}.hero-selector{display:grid;grid-template-columns:repeat(2,1fr);padding:14px}.hero-selector a:nth-child(2),.hero-selector a:nth-child(4){border-right:1px solid rgba(255,255,255,.14)}.selector-axis{display:none}.hero-summary{margin-top:55px}
  .selection-grid{grid-template-columns:repeat(2,1fr)}
  .platform-layout{grid-template-columns:.9fr 1.1fr;gap:48px}.product-stage{height:485px}.product-crop img{height:400px}.crop-c{top:24px;width:86%;max-width:405px;height:395px}.crop-c img{top:-128px;height:535px;transform:translateX(-82%)}
  .match-layout{gap:50px}.match-graphic{display:none}
}

@media(max-width:820px){
  html{scroll-padding-top:132px}.site-shell{width:min(100% - 32px,680px)}
  .site-header{height:auto}.header-inner{display:block;padding:15px 0}.brand img{width:118px}.main-nav{margin-top:12px;padding-top:12px;border-top:1px solid var(--line);gap:10px 20px;overflow:auto}.main-nav a{padding:5px 0 8px}.main-nav a:after{bottom:0}
  .product-hero{padding-top:75px}.hero-copy h1{font-size:41px}.hero-copy h1 span{white-space:normal}.hero-lead{font-size:16px}.hero-summary{grid-template-columns:1fr}.hero-summary article,.hero-summary article:first-child{min-height:auto;padding:19px 0;border-right:0;border-bottom:1px solid rgba(255,255,255,.17)}.hero-summary article:last-child{border-bottom:0}
  .section{padding:78px 0}.section-head{margin-bottom:36px}.section-head h2,.platform-copy h2,.match-layout h2{font-size:34px}.section-head>p:last-child{font-size:16px}
  .selection-lines,.platform-decoration{display:none}.selection-grid>a{min-height:410px}
  .platform-section{min-height:auto}.platform-layout,.match-layout{grid-template-columns:1fr}.reverse-layout .product-stage,.reverse-layout .platform-copy{order:initial}.product-stage{height:500px;max-width:580px;width:100%;margin:0 auto}.platform-copy h3{font-size:20px}.platform-lead{font-size:16px}
  .match-layout{gap:37px}.match-inputs{padding:28px}
  .footer-main{display:block}.footer-nav{margin-top:30px;grid-template-columns:repeat(2,1fr)}
}

@media(max-width:560px){
  .site-shell{width:calc(100% - 28px)}.main-nav{gap:10px 18px}
  .product-hero{padding-top:56px}.hero-copy h1{font-size:34px}.hero-actions,.match-actions{align-items:stretch;flex-direction:column}.btn{width:100%}
  .hero-selector{grid-template-columns:1fr}.hero-selector a,.hero-selector a:nth-child(2),.hero-selector a:nth-child(4){border-right:0}.hero-summary{margin-top:38px}
  .section{padding:68px 0}.section-head h2,.platform-copy h2,.match-layout h2{font-size:29px}
  .selection-grid{grid-template-columns:1fr}.selection-grid>a{min-height:355px}.selection-grid p{min-height:0}.selection-impact{min-height:68px}
  .platform-layout{gap:39px}.product-stage{height:390px}.product-crop{top:34px;width:78%;max-width:286px;height:290px}.product-crop img{height:335px;top:-60px}.crop-c{top:20px;width:88%;max-width:320px;height:310px}.crop-c img{height:430px;top:-110px;transform:translateX(-82%)}.stage-corner{width:78px;height:78px}.stage-corner span{left:14px;top:10px;font-size:27px}.platform-copy h3{margin-top:15px}.spec-grid{grid-template-columns:1fr}.spec-grid article{min-height:auto}.project-fit{grid-template-columns:1fr;gap:7px}
  .match-inputs{padding:22px}.match-inputs ul{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
}

/* 14英寸笔记本阅读校准：提高参数说明可读性，并保护短标签不拆字 */
@media(min-width:821px){
  .hero-selector small,.hero-summary span{font-size:13px}
  .selection-impact span{font-size:13px;white-space:nowrap}.selection-impact b{font-size:14px}
  .selection-grid>a>strong{font-size:15px}
  .spec-grid span{font-size:13px}.spec-grid strong{font-size:16px}
  .project-fit{grid-template-columns:96px minmax(0,1fr)}.project-fit span{font-size:14px;white-space:nowrap}.project-fit p{font-size:15px}
}