/* FILE: css/style.css | 完整交付，无省略 */
:root{--bp:#1B3A5C;--bp-soft:#23466B;--line:#3E638C;--grid:#2A4E74;--text:#EAF2FA;--muted:#9FB8CF;--white:#FFFFFF;--accent:#7FD1FF;--warn:#FFB454;--ink:#0D1710;--container:min(1180px,calc(100% - 36px));}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background-color:var(--bp);color:var(--text);font-family:"Inter",system-ui,sans-serif;line-height:1.6;overflow-x:hidden;background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px),linear-gradient(rgba(62,99,140,.25) 1px,transparent 1px),linear-gradient(90deg,rgba(62,99,140,.25) 1px,transparent 1px);background-size:24px 24px,24px 24px,120px 120px,120px 120px}
a{color:inherit;text-decoration:none}img{display:block;max-width:100%}button,input,select,textarea{font:inherit}button{cursor:pointer}:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.container{width:var(--container);margin:auto}.site-header{position:sticky;top:0;z-index:80;background:rgba(27,58,92,.97);border-bottom:1px solid var(--line);backdrop-filter:blur(8px)}.nav{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:10px;font:600 15px "IBM Plex Mono",monospace}.logo-grid{width:34px;height:34px;display:grid;place-items:center}.logo-grid svg{width:34px;height:34px}.nav-links{display:flex;gap:22px;align-items:center;font:11px "IBM Plex Mono",monospace;text-transform:uppercase}.nav-links a{color:var(--muted)}.nav-links a:hover{color:var(--white)}.nav-actions{display:flex;align-items:center;gap:10px}.cart-link{position:relative;padding:7px}.cart-link svg{width:22px;height:22px}.cart-badge{position:absolute;right:-2px;top:-2px;min-width:17px;height:17px;border-radius:2px;background:var(--warn);color:var(--bp);font:600 10px/17px "IBM Plex Mono",monospace;text-align:center}.hamburger{display:none;background:none;border:0;padding:7px}.hamburger span{display:block;width:26px;height:2px;background:var(--white);margin:5px 0}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:43px;padding:9px 15px;border:1px solid var(--line);border-radius:2px;background:transparent;color:var(--text);transition:.2s}.btn-primary{background:var(--accent);color:var(--bp);border-color:var(--accent);font-family:"IBM Plex Mono",monospace;font-weight:600}.btn-primary:hover{filter:brightness(1.1)}.btn-secondary{border-color:var(--white);color:var(--white)}.btn-secondary:hover{border-color:var(--accent);color:var(--accent)}.btn-dark{background:var(--bp-soft);border-color:var(--white);color:var(--white)}.btn-small{min-height:36px;padding:7px 11px;font-size:11px}.page-head{text-align:center;padding:64px 0 32px}.eyebrow,.micro,.measure,.fig-label{font:11px/1.4 "IBM Plex Mono",monospace;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}.page-head h1,.hero-title{font:600 clamp(36px,6vw,62px)/1.12 "Unbounded",sans-serif;letter-spacing:-.055em;margin:9px auto 18px}.lede{max-width:760px;margin:0 auto;color:var(--muted)}.hero-shell{min-height:calc(100vh - 72px);display:flex;align-items:center;padding:26px 0 54px}.hero-frame{position:relative;min-height:690px;border:1px solid var(--line);padding:22px;background:rgba(27,58,92,.88);overflow:hidden}.hero-corner{position:absolute;width:34px;height:34px;border-color:var(--white);opacity:.8}.hero-corner.tl{left:10px;top:10px;border-left:1px solid;border-top:1px solid}.hero-corner.tr{right:10px;top:10px;border-right:1px solid;border-top:1px solid}.hero-corner.bl{left:10px;bottom:10px;border-left:1px solid;border-bottom:1px solid}.hero-corner.br{right:10px;bottom:10px;border-right:1px solid;border-bottom:1px solid}.hero-topline{display:flex;justify-content:space-between;gap:14px;color:var(--muted);font:11px "IBM Plex 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16px;padding:13px;border:1px solid var(--line);background:rgba(35,70,107,.86);position:relative;transition:.2s}.masonry-card img{width:100%;border:1px solid var(--line)}.masonry-card:hover{border-color:var(--accent)}.masonry-card:after{content:"";position:absolute;top:14px;right:14px;width:9px;height:9px;border:1px solid var(--accent)}.quote-sheet{border:1px dashed var(--white);padding:52px 28px;text-align:center}.quote-sheet blockquote{max-width:900px;margin:0 auto 12px;font:italic clamp(26px,4.4vw,42px)/1.2 Georgia,serif}.work-strip{display:flex;gap:14px;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:10px}.work-card{min-width:320px;scroll-snap-align:start;border:1px solid var(--line);background:rgba(35,70,107,.84);padding:11px}.work-card img{width:100%;border:1px solid var(--line)}.work-card p{margin:8px 0 0;color:var(--muted);font-size:13px}.legend-line{display:flex;gap:20px;flex-wrap:wrap;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:17px 0}.legend-item{display:flex;align-items:center;gap:8px;font:12px "IBM Plex Mono",monospace}.legend-dot{width:13px;height:13px;border:1px solid var(--white)}.legend-draft{background:var(--white)}.legend-blueprint{background:var(--accent)}.legend-surveyor{background:var(--warn)}.legend-architect{background:var(--bp-soft)}.ticket{max-width:600px;margin:auto;border:1px solid var(--line);padding:26px;background:rgba(35,70,107,.85)}.ticket-head{display:flex;justify-content:space-between;gap:20px;border-bottom:1px dashed var(--line);padding-bottom:15px;margin-bottom:18px}.progress{display:flex;justify-content:center;gap:22px;flex-wrap:wrap;margin:30px 0 20px}.progress-step{display:flex;align-items:center;gap:7px;color:var(--muted);font:11px "IBM Plex Mono",monospace}.progress-step .n{width:25px;height:25px;border:1px solid var(--line);display:grid;place-items:center}.progress-step.active .n{background:var(--accent);border-color:var(--accent);color:var(--bp)}.progress-step.done 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var(--line);padding:76px 20px}.ruler-icon{width:82px;height:82px;margin:0 auto 14px}.checkout-center{max-width:600px;margin:auto}.order-summary{border:1px solid var(--line);padding:15px;background:rgba(35,70,107,.78)}.order-summary summary{cursor:pointer;font:12px "IBM Plex Mono",monospace}.notice{border:1px dashed var(--accent);padding:12px 14px;color:var(--muted);font-size:12px;margin:16px 0}.payment-option{display:flex;align-items:center;gap:10px;border:1px solid var(--line);padding:12px;margin:7px 0}.success-panel{display:none;border:1px solid var(--accent);padding:36px;text-align:center}.success-mark{width:74px;height:74px;border:1px solid var(--accent);display:grid;place-items:center;margin:0 auto 16px;color:var(--accent);font:40px "IBM Plex Mono",monospace}.plan-grid-split{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}.preview-pane{position:sticky;top:94px;border:1px solid var(--line);background:rgba(35,70,107,.9);padding:18px}.preview-large{border:1px 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0;font-size:17px}.review-meta{color:var(--muted);font-size:12px}.verified{display:inline-block;background:var(--accent);color:var(--bp);padding:3px 7px;font:700 10px "IBM Plex Mono",monospace}.review-helpful{color:var(--muted);font:11px "IBM Plex Mono",monospace}.also-scroll{display:flex;gap:12px;overflow-x:auto;scroll-snap-type:x mandatory}.also-card{min-width:220px;scroll-snap-align:start;border:1px solid var(--line);background:rgba(35,70,107,.8);padding:10px}.also-card img{width:100%;border:1px solid var(--line)}.also-card strong{display:block;margin-top:9px}.also-card span{font:11px "IBM Plex Mono",monospace;color:var(--accent)}.stair-wrap{display:grid;gap:10px}.stair-row{position:relative;border:1px solid var(--line);background:rgba(35,70,107,.84);padding:18px 20px;display:grid;grid-template-columns:1.05fr 1.55fr .9fr;gap:18px;align-items:center;transition:.2s}.stair-row:hover{border-color:var(--accent)}.stair-row:nth-child(1){width:60%}.stair-row:nth-child(2){width:74%}.stair-row:nth-child(3){width:87%}.stair-row:nth-child(4){width:100%}.stair-row.surveyor{background:rgba(35,70,107,.97);border-color:var(--warn)}.stair-features{display:flex;gap:8px;flex-wrap:wrap}.stair-features span{font-size:11px;color:var(--muted);white-space:nowrap}.stair-price{text-align:right;font:600 21px "IBM Plex Mono",monospace}.stair-actions{display:flex;justify-content:flex-end;gap:6px;flex-wrap:wrap}.plan-badge{position:absolute;right:-1px;top:-1px;background:var(--warn);color:var(--bp);padding:5px 8px;font:700 10px "IBM Plex Mono",monospace;transform:rotate(-3deg)}.table-wrap{overflow:auto;border:1px solid var(--line);background:rgba(35,70,107,.75)}.compare-table{width:100%;min-width:950px;border-collapse:collapse}.compare-table th,.compare-table td{padding:12px;border-bottom:1px solid var(--line);font-size:12px;text-align:left}.compare-table th{font:500 11px "IBM Plex Mono",monospace;color:var(--muted)}.compare-table .highlight{background:rgba(255,180,84,.14);color:var(--white)}.spec-page{display:grid;grid-template-columns:220px 1fr;gap:30px}.spec-nav{position:sticky;top:96px;height:max-content;border:1px solid var(--line);padding:15px;background:rgba(35,70,107,.82)}.spec-nav a{display:block;padding:6px 0;color:var(--muted);font:11px "IBM Plex Mono",monospace}.spec-section{padding:0 0 38px;margin-bottom:38px;border-bottom:1px dashed var(--line)}.spec-section h2{font:600 27px/1.2 "Unbounded",sans-serif;margin:5px 0 12px}.spec-section p{color:var(--muted)}.param-table{width:100%;border-collapse:collapse}.param-table th,.param-table td{padding:9px;border-bottom:1px solid var(--line);font-size:12px;text-align:left}.param-table th{font:500 11px "IBM Plex Mono",monospace;color:var(--muted)}.archive-layout{display:grid;grid-template-columns:220px 1fr;gap:30px}.archive-card{position:sticky;top:96px;height:max-content;border:1px solid var(--line);padding:17px;background:rgba(35,70,107,.82)}.archive-card strong{font:600 14px "IBM Plex Mono",monospace}.archive-card p{color:var(--muted);font-size:12px}.story-stack{display:grid;gap:20px}.story-card{border:1px solid var(--line);background:rgba(35,70,107,.8);padding:21px}.story-card h2{font:600 24px/1.2 "Unbounded",sans-serif}.value-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.value-card{border:1px solid var(--line);padding:18px;background:rgba(35,70,107,.82)}.value-card h3{font:600 15px "IBM Plex Mono",monospace}.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.faq-group{border:1px solid var(--line);padding:18px;background:rgba(35,70,107,.72)}.faq-group h2{font:600 15px "IBM Plex Mono",monospace}.faq-group details{border-top:1px dashed var(--line);padding:12px 0}.faq-group details:first-of-type{border-top:0}.faq-group summary{cursor:pointer;list-style:none;font:12px "IBM Plex Mono",monospace}.faq-group summary::-webkit-details-marker{display:none}.faq-group details p{color:var(--muted);font-size:13px;margin:9px 0 0}.company-strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:12px 0;color:var(--muted);font-size:12px}.company-strip .container{display:flex;gap:16px;flex-wrap:wrap}.inline-form{display:flex;gap:8px;max-width:520px;margin:18px auto 0}.inline-form input{flex:1;padding:10px 0;background:transparent;color:var(--text);border:0;border-bottom:1px solid var(--line)}footer{margin-top:70px;border-top:1px solid var(--line)}.footer-top{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:30px;padding:44px 0 28px}.footer-links{display:grid;grid-template-columns:1fr 1fr;gap:20px}.footer-links h4{margin:0 0 9px;font:600 11px "IBM Plex Mono",monospace}.footer-links a{display:block;color:var(--muted);font-size:12px;margin:4px 0}.footer-brand p{color:var(--muted);max-width:320px}.ownership-note{color:var(--accent)!important;font-size:11px!important;max-width:370px!important}.footer-bottom{border-top:1px solid var(--line);padding:15px 0;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;color:var(--muted);font:11px "IBM Plex Mono",monospace}.cookie-banner{display:none;position:fixed;left:16px;right:16px;bottom:16px;z-index:100}.cookie-inner{max-width:1040px;margin:auto;padding:14px 16px;border:1px solid var(--white);background:var(--bp-soft);display:flex;align-items:center;justify-content:space-between;gap:14px}.cookie-actions{display:flex;gap:8px;flex-shrink:0}.lightbox{display:none;position:fixed;inset:0;background:rgba(13,23,16,.92);z-index:120;align-items:center;justify-content:center;padding:25px}.lightbox.open{display:flex}.lightbox img{max-width:92vw;max-height:88vh;border:1px solid var(--white)}.sub-total{margin-top:11px;color:var(--accent);font:11px "IBM Plex Mono",monospace}.unit-switch{display:flex;gap:6px;margin-top:12px}.unit-switch button{border:1px solid var(--line);background:transparent;color:var(--muted);padding:7px 11px;border-radius:2px;font:11px "IBM Plex Mono",monospace}.unit-switch button.active{border-color:var(--accent);color:var(--accent)}.qty{display:inline-flex;border:1px solid var(--line);margin-top:10px}.qty button{border:0;background:transparent;color:var(--white);padding:4px 9px}.qty span{padding:4px 9px;font:11px "IBM Plex Mono",monospace}.muted{color:var(--muted)}
@media (prefers-reduced-motion:no-preference){.draw-line{stroke-dasharray:900;stroke-dashoffset:900;animation:drawLine 1.2s ease forwards}.fade-in{animation:fadeIn .6s ease both}@keyframes drawLine{to{stroke-dashoffset:0}}@keyframes fadeIn{from{opacity:0}to{opacity:1}}}
@media (max-width:900px){.nav-links{display:none;position:absolute;left:18px;right:18px;top:72px;background:var(--bp-soft);border:1px solid var(--line);padding:14px;flex-direction:column;align-items:stretch}.nav.nav-open .nav-links{display:flex}.hamburger{display:block}.footer-top{grid-template-columns:1fr}.plan-grid-split,.spec-page,.archive-layout,.cart-grid{grid-template-columns:1fr}.preview-pane,.spec-nav,.archive-card{position:static}.doc-column{border-left:0;padding-left:0}.stair-row,.stair-row:nth-child(1),.stair-row:nth-child(2),.stair-row:nth-child(3),.stair-row:nth-child(4){width:100%}}
@media (max-width:640px){:root{--container:calc(100% - 24px)}.hero-frame{min-height:620px;padding:15px}.live-form{margin-top:58px;padding:18px}.form-grid{grid-template-columns:1fr}.section{padding:55px 0}.section-head{display:block}.masonry{columns:1}.work-card{min-width:82%}.trust-row{grid-template-columns:1fr 1fr}.stair-row{grid-template-columns:1fr}.stair-price{text-align:left}.stair-actions{justify-content:flex-start}.kv-grid,.review-layout,.value-grid,.faq-grid{grid-template-columns:1fr}.cookie-inner{flex-direction:column;align-items:flex-start}.cookie-actions{width:100%}.cookie-actions .btn{flex:1}.cart-item{grid-template-columns:70px 1fr}.cart-item>.item-price{grid-column:2}.footer-bottom{flex-direction:column}}

.field.full{grid-column:1/-1}.contact-narrow{max-width:600px;margin-inline:auto}

.promo-strip{border:1px solid var(--line);background:var(--warn);color:var(--bp);padding:15px;text-align:center;font:12px "IBM Plex Mono",monospace;margin:24px 0}.trust-row{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line)}.trust-item{padding:15px;text-align:center;border-right:1px solid var(--line);color:var(--muted);font:11px "IBM Plex Mono",monospace}.trust-item:last-child{border-right:0}.compare-block{margin-top:45px}.center{text-align:center}

.faq-cta{margin-top:48px}

.contact-strip{max-width:600px;margin:26px auto 0}

.detail-container{padding-top:28px}.detail-head{padding:12px 0 25px}

.legal-shell{max-width:820px;margin:auto}.compare-block{margin-top:45px}