:root{--bg:#06090f;--bg2:#0b111b;--surface:#101824;--surface2:#151f2d;--card:#0d1420;--ink:#f7f2e8;--muted:#a9b3c3;--soft:#d8c28a;--gold:#d8b866;--gold2:#fff1bd;--line:rgba(255,255,255,.12);--line2:rgba(216,184,102,.28);--shadow:0 28px 80px rgba(0,0,0,.42);--radius:28px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 20% 0,rgba(216,184,102,.13),transparent 34%),radial-gradient(circle at 88% 18%,rgba(74,128,255,.1),transparent 32%),linear-gradient(180deg,var(--bg),#090d14 48%,#05070b);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.72;-webkit-font-smoothing:antialiased;text-rendering:optimizeSpeed}a{text-decoration:none;color:inherit}img{display:block;max-width:100%;height:auto}button,input,select,textarea{font:inherit}.container{width:min(1200px,calc(100% - 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@media(max-width:1180px){.nav-wrap{grid-template-columns:1fr 44px}.nav,.nav-actions{display:none}.menu-toggle{display:flex}.nav.open{display:flex!important;position:absolute;top:72px;left:12px;right:12px;flex-direction:column;background:#0b111b;border:1px solid var(--line);border-radius:22px;padding:18px;box-shadow:var(--shadow);align-items:flex-start;z-index:999}.nav.open a{font-size:16px}.hero,.split-head,.support-grid,.verify-download,.contact-panel{grid-template-columns:1fr}.quick-entry,.intro-grid,.channel-notes,.product-grid,.article-grid{grid-template-columns:1fr 1fr}.model-strip{grid-template-columns:repeat(3,1fr)}.product-wide{grid-column:auto;grid-template-columns:210px 1fr}.route-line{grid-template-columns:1fr;gap:10px}.route-line i{height:18px;width:1px;justify-self:center;background:linear-gradient(transparent,var(--gold),transparent)}.compare-row{grid-template-columns:1fr 1fr}.compare-row.head{display:none}.download-card{grid-template-columns:1fr}.footer-grid{flex-direction:column}.footer-links{align-items:flex-start}}
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/* ===== Layout refinement v6: desktop + mobile polish ===== */
:root{--content:1180px}.container{width:min(var(--content),calc(100% - 48px))}.section{padding:82px 0}.section-head{margin-bottom:30px}.section-head h2,.channel h2,.support-copy h2,.contact-panel h2{font-size:clamp(30px,3vw,44px);line-height:1.16;letter-spacing:-.035em}.section-head p{max-width:900px}.hero{padding:84px 0 64px;grid-template-columns:1.02fr .98fr;gap:54px;align-items:center}.hero h1{font-size:clamp(38px,4.4vw,58px);line-height:1.05;letter-spacing:-.055em;margin:10px 0 18px;max-width:760px}.hero p{max-width:760px;font-size:18px;line-height:1.82}.hero-keywords{gap:10px;margin:22px 0}.hero-keywords a{font-size:13px;padding:8px 12px}.hero-actions{margin-top:24px}.hero-visual{min-height:500px;border-radius:36px}.hero-device{width:min(88%,520px);max-height:430px;object-fit:contain;filter:drop-shadow(0 30px 56px rgba(0,0,0,.55))}.hero-card{left:22px;right:22px;bottom:22px}.quick-entry{gap:18px}.quick-entry a{min-height:150px;padding:22px}.split-head{gap:34px;align-items:start}.intro-grid article,.channel-notes article,.model-strip article,.article-grid article{border-radius:26px}.model-strip{grid-template-columns:repeat(5,minmax(0,1fr));gap:14px;margin-bottom:26px}.model-strip article{min-height:144px;padding:20px}.model-strip b{font-size:18px;line-height:1.22}.product-grid{gap:22px}.product-card{grid-template-columns:230px 1fr;gap:24px;padding:24px;border-radius:34px;min-height:360px;align-items:stretch;position:relative}.product-wide{grid-template-columns:280px 1fr;min-height:310px}.product-media{min-height:300px;border-radius:26px;padding:24px;background:radial-gradient(circle at 50% 34%,rgba(255,255,255,.1),rgba(216,184,102,.1) 48%,rgba(255,255,255,.025) 72%)}.product-media img{height:260px;width:100%;object-fit:contain;filter:drop-shadow(0 22px 34px rgba(0,0,0,.48))}.product-wide .product-media{min-height:270px}.product-wide .product-media img{height:240px}.product-content{min-width:0}.product-content h3{font-size:24px;line-height:1.25;margin:7px 0 10px}.product-content p{font-size:15px;line-height:1.72}.specs{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:8px 0 20px}.specs b{min-height:54px;display:flex;align-items:center;line-height:1.45}.product-content .btn{align-self:flex-start;padding:12px 18px}.buy-guide{margin-top:24px;padding:28px 30px;border-radius:32px}.compare-table{border-radius:30px}.compare-row{grid-template-columns:1fr 1fr 1.2fr 1.15fr 1.6fr .75fr;padding:18px 20px}.verify-download{gap:22px}.download-card,.verify-card,.support-form,.contact-panel{border-radius:34px}.download-card{grid-template-columns:1fr 240px}.download-card img{max-height:240px}.article-grid{gap:18px}.faq-list details{border-radius:22px}.footer{padding:46px 0 90px}.footer-grid{align-items:flex-start}.footer-brand{max-width:850px}.footer strong{line-height:1.28}.footer-links{min-width:130px}.contact-modal{padding:18px}.modal-card{border-radius:32px}.qr-box img{aspect-ratio:1/1;object-fit:cover}
@media(max-width:1180px){.container{width:min(100%,calc(100% - 36px))}.section{padding:70px 0}.hero{grid-template-columns:1fr;gap:34px;padding-top:60px}.hero h1{font-size:clamp(36px,7vw,50px)}.hero-visual{min-height:430px}.hero-device{max-height:340px}.model-strip{grid-template-columns:repeat(3,1fr)}.product-grid{grid-template-columns:1fr}.product-card,.product-wide{grid-template-columns:240px 1fr;min-height:auto}.product-wide{grid-column:auto}.product-media{min-height:270px}.product-media img,.product-wide .product-media img{height:235px}.download-card{grid-template-columns:1fr}.footer-grid{gap:24px}.footer-links{display:grid;grid-template-columns:repeat(3,max-content);align-items:center;justify-content:start}}
@media(max-width:760px){.container{width:min(100%,calc(100% - 24px))}.section{padding:50px 0}.section-head{margin-bottom:20px}.section-head h2,.channel h2,.support-copy h2,.contact-panel h2{font-size:27px;line-height:1.18}.nav-wrap{height:68px}.hero{padding:38px 0 18px;gap:22px}.hero h1{font-size:30px;line-height:1.16;letter-spacing:-.035em;margin-bottom:12px}.hero p{font-size:15px;line-height:1.76}.hero-keywords{margin:16px 0;gap:8px}.hero-keywords a{font-size:12px;padding:7px 10px}.hero-actions{gap:10px;margin-top:18px}.hero-actions .btn{min-height:46px;display:flex;align-items:center;justify-content:center}.hero-visual{min-height:320px;border-radius:24px;padding:16px}.hero-device{width:86%;max-height:230px}.hero-card{position:static;margin:12px 0 0;width:100%;padding:14px;border-radius:18px}.quick-entry{grid-template-columns:1fr;gap:12px}.quick-entry a{min-height:120px;padding:18px;border-radius:22px}.split-head{gap:18px}.intro-grid,.channel-notes,.model-strip,.article-grid{gap:12px}.model-strip article{min-height:auto;padding:16px}.product-grid{gap:16px}.product-card,.product-wide{grid-template-columns:1fr;padding:16px;border-radius:24px;gap:16px}.product-media,.product-wide .product-media{min-height:220px;padding:18px;border-radius:22px}.product-media img,.product-wide .product-media img{height:190px;max-width:94%;margin:auto}.product-content span{font-size:11px}.product-content h3{font-size:21px;line-height:1.28}.product-content p{font-size:14px;line-height:1.72}.specs{grid-template-columns:1fr;gap:8px}.specs b{min-height:auto;padding:10px 12px}.product-content .btn,.buy-guide .btn,.support-form .btn,.download-card .btn,.verify-card .btn,.qr-preview .btn{width:100%;justify-content:center;text-align:center}.buy-guide{padding:18px;border-radius:24px;gap:14px}.buy-guide h3{font-size:22px}.compare-table{border-radius:22px}.compare-row{grid-template-columns:1fr;gap:6px;padding:15px}.compare-row span:not(:first-child){border-top:1px solid rgba(255,255,255,.08);padding-top:8px}.verify-download{gap:16px}.download-card,.verify-card,.support-form,.contact-panel{border-radius:24px;padding:18px}.support-tags{gap:8px}.support-tags span{font-size:12px;padding:7px 10px}.contact-panel{grid-template-columns:1fr}.qr-preview img{max-width:280px;margin:auto}.footer{padding:32px 0 86px}.footer-brand{gap:12px}.footer strong{font-size:18px}.footer p{font-size:13px;line-height:1.7;word-break:break-word}.footer-links{grid-template-columns:1fr 1fr;gap:8px;width:100%}.footer-links a,.footer-btn{text-align:center;border:1px solid var(--line);border-radius:999px;padding:9px 10px}.footer-btn{width:100%}.modal-card{width:min(390px,100%);padding:22px 16px}.modal-card h2{font-size:25px}.floating-contact{font-size:15px;min-height:48px}}
@media(max-width:420px){.hero h1{font-size:28px}.section-head h2,.channel h2,.support-copy h2,.contact-panel h2{font-size:25px}.hero-device{max-height:210px}.product-media img,.product-wide .product-media img{height:170px}.footer-links{grid-template-columns:1fr}}

/* ===== Buy guide beautify ===== */
.buy-guide{margin-top:24px;padding:30px 32px;border-radius:32px;border:1px solid var(--line2);background:linear-gradient(135deg,rgba(216,184,102,.16),rgba(255,255,255,.04) 38%,rgba(50,82,140,.08));display:grid;grid-template-columns:minmax(0,1.45fr) minmax(250px,.55fr);gap:26px;align-items:stretch;box-shadow:0 22px 60px rgba(0,0,0,.24)}
.guide-copy{min-width:0}
.guide-copy .eyebrow{margin-bottom:10px}
.buy-guide h3{margin:0 0 10px;font-size:clamp(28px,2.4vw,36px);line-height:1.18;letter-spacing:-.03em;text-wrap:balance;max-width:16em}
.buy-guide > p,.guide-copy > p{margin:0;color:var(--muted);font-size:15px;line-height:1.82;max-width:70ch}
.guide-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:20px}
.guide-steps article{border:1px solid rgba(255,255,255,.08);background:rgba(6,9,15,.26);border-radius:22px;padding:18px 16px;min-height:168px;display:flex;flex-direction:column;gap:10px;backdrop-filter:blur(6px)}
.guide-steps i{font-style:normal;display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:999px;background:rgba(216,184,102,.14);border:1px solid var(--line2);color:var(--gold2);font-size:13px;font-weight:950;letter-spacing:.08em}
.guide-steps b{font-size:18px;line-height:1.2;color:var(--ink)}
.guide-steps span{color:var(--muted);font-size:14px;line-height:1.72}
.guide-action{display:flex;flex-direction:column;justify-content:center;gap:14px;padding:20px;border:1px solid rgba(255,255,255,.08);border-radius:26px;background:rgba(6,9,15,.28)}
.guide-action .btn{width:100%;min-height:52px;padding:14px 18px;font-size:16px;box-shadow:none}
.guide-action p{margin:0;color:var(--muted);font-size:14px;line-height:1.8}
@media(max-width:1180px){.buy-guide{grid-template-columns:1fr}.guide-action{padding:18px}.guide-steps{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:760px){.buy-guide{padding:20px;border-radius:24px;gap:16px}.buy-guide h3{font-size:24px;max-width:none}.guide-steps{grid-template-columns:1fr;gap:10px;margin-top:16px}.guide-steps article{min-height:auto;padding:16px;border-radius:18px}.guide-action{padding:16px;border-radius:20px}.guide-action .btn{font-size:15px;min-height:48px}.guide-action p,.guide-steps span,.guide-copy > p{font-size:14px;line-height:1.72}}