:root{--ink:#17222b;--muted:#5d6a75;--line:#dce3e8;--soft:#f4f7f9;--green:#76b900;--blue:#1769c2;--dark:#07111f}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font:15px/1.72 "Microsoft YaHei",Arial,sans-serif;background:#fff}a{color:var(--blue);text-decoration:none}img{max-width:100%}.wrap{width:min(1180px,calc(100% - 40px));margin:auto}.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line)}.header-inner{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:13px;color:var(--ink)}.brand img{width:52px;height:36px;object-fit:contain}.brand strong{display:block;font-size:17px}.brand small{display:block;color:var(--muted)}nav{display:flex;gap:22px;align-items:center}nav a{color:#3d4a55;font-weight:700}.hero{background:#08120d;color:#fff}.hero-grid{min-height:470px;display:grid;grid-template-columns:minmax(0,1fr) 440px;gap:54px;align-items:center;padding:54px 0}.eyebrow{display:block;margin-bottom:12px;color:#76b900;font-size:12px;font-weight:900;text-transform:uppercase}.hero h1{margin:0 0 18px;font-size:clamp(34px,5vw,58px);line-height:1.12}.hero p{max-width:690px;color:#ced9d1;font-size:17px}.hero-media{position:relative;overflow:hidden;aspect-ratio:1200/630;border:1px solid #344338;border-radius:8px;background:#000}.hero-media img{width:100%;height:100%;object-fit:cover}.hero-badge{position:absolute;right:12px;bottom:12px;padding:7px 10px;background:rgba(0,0,0,.75);font-weight:800}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}.btn{display:inline-flex;min-height:48px;align-items:center;justify-content:center;padding:11px 22px;border-radius:6px;font-weight:850}.btn-primary{background:var(--blue);color:#fff}.btn-secondary{border:1px solid #77857b;color:#fff}.meta-row{display:flex;gap:18px;flex-wrap:wrap;margin-top:20px;color:#aebbb2;font-size:13px}.section{padding:64px 0}.section:nth-child(odd){background:var(--soft)}.section-heading{max-width:800px;margin-bottom:28px}.section h2{margin:0;font-size:30px;line-height:1.3}.decision,.record-grid,.variant-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.decision article,.record-grid article,.variant-grid article{padding:24px;border:1px solid var(--line);border-top:4px solid var(--green);background:#fff}.decision b{color:var(--blue);font-size:13px}.decision h3,.variant-grid h3{margin:8px 0}.decision p,.record-grid p,.variant-grid p,.prose{color:var(--muted)}.split{display:grid;grid-template-columns:1.1fr .9fr;gap:30px}.callout,.warning{padding:24px;border-left:4px solid var(--green);background:#eef5e8}.warning{border-color:#d88b22;background:#fff7e8}.table-wrap{overflow-x:auto;border:1px solid var(--line)}table{width:100%;min-width:650px;border-collapse:collapse;background:#fff}th,td{padding:15px 18px;border-bottom:1px solid 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var(--line)}.intent-map{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.intent-map.four{grid-template-columns:repeat(4,1fr)}.intent-map a{padding:22px;border:1px solid var(--line);background:#fff}.intent-map b,.intent-map span{display:block}.intent-map span{margin-top:7px;color:var(--muted)}.checklist span{color:var(--green);font-weight:900}.mid-cta{padding:28px;background:#102035;color:#fff;display:flex;justify-content:space-between;align-items:center;gap:20px}.mid-cta p{margin:4px 0 0;color:#c7d2df}.source-note{font-size:13px;color:var(--muted)}.site-footer{padding:36px 0;background:#0e1a27;color:#b7c2cd}.footer-grid{display:flex;justify-content:space-between;gap:30px}.footer-links{display:flex;gap:18px;flex-wrap:wrap}.site-footer a,.legal a{color:#fff}.legal{padding:18px 20px;background:#07111f;color:#cbd5e1;text-align:center;font-size:12px}.legal p{margin:3px}.mobile-download{display:none}.menu{display:none}@media(max-width:800px){.hero-grid{grid-template-columns:1fr;gap:28px}.hero-media{width:100%}.decision,.record-grid,.variant-grid,.intent-map,.intent-map.four,.facts{grid-template-columns:1fr 1fr}.split{grid-template-columns:1fr}nav{display:none}.menu{display:block;border:0;background:none;font-size:24px}.mobile-download{position:fixed;z-index:40;left:12px;right:12px;bottom:10px;display:flex;min-height:50px;align-items:center;justify-content:center;border-radius:6px;background:var(--blue);color:#fff;font-weight:850;box-shadow:0 10px 30px #0005}body{padding-bottom:70px}}@media(max-width:520px){.wrap{width:min(100% - 28px,1180px)}.hero h1{font-size:34px}.hero-grid{padding:38px 0}.section{padding:48px 0}.section h2{font-size:25px}.decision,.record-grid,.variant-grid,.intent-map,.intent-map.four,.facts,.compare-strip{grid-template-columns:1fr}.mid-cta,.footer-grid{align-items:flex-start;flex-direction:column}.timeline li{grid-template-columns:1fr;gap:2px}}.steps{counter-reset:step;display:grid;gap:0;margin:0;padding:0;list-style:none}.steps li{position:relative;min-height:108px;padding:0 0 26px 76px}.steps li:before{counter-increment:step;content:"0" counter(step);position:absolute;left:0;top:0;display:grid;width:47px;height:47px;place-items:center;border-radius:50%;background:var(--blue);color:#fff;font-size:13px;font-weight:900}.steps li:not(:last-child):after{content:"";position:absolute;left:23px;top:52px;bottom:5px;border-left:1px solid #b6cfdf}.steps h3{font-size:20px;margin-bottom:8px}.steps p{margin:0;color:var(--muted)}.case-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.case-grid article{padding:24px;border:1px solid var(--line);border-radius:14px;background:#fff}.case-grid h3{font-size:19px}.case-grid p{margin:0;color:var(--muted)}.case-label{display:inline-block;padding:4px 8px;margin-bottom:13px;border-radius:6px;background:#eaf3ff;color:var(--blue);font-size:12px;font-weight:900}.check{margin:0;padding:0;list-style:none}.check li{position:relative;margin:0 0 15px;padding:15px 17px 15px 43px;border:1px solid var(--line);border-radius:8px;background:#fff}.check li:before{content:"✓";position:absolute;left:16px;color:#4d8d00;font-weight:900}@media(max-width:760px){.case-grid{grid-template-columns:1fr}}

/* ===== GTX 780 正文模块（仅 article.post 体系） ===== */
.safe-download-btn{display:inline-grid;grid-template-columns:34px minmax(0,1fr);align-items:center;gap:13px;min-width:278px;min-height:72px;padding:12px 22px;text-align:left}
.safe-download-copy{display:flex;min-width:0;flex-direction:column;align-items:flex-start;justify-content:center;line-height:1.25}
.safe-download-copy strong{font-size:19px;font-weight:800;color:inherit}
.safe-download-copy small{margin-top:4px;font-size:13px;font-weight:500;color:inherit;opacity:.86;white-space:nowrap}
.source-note{margin-top:16px!important;padding-top:14px;border-top:1px solid var(--line);font-size:12px!important;color:#71808d!important}
.source-note a{color:var(--blue);text-decoration:underline}
.post{max-width:780px;margin:0 auto;padding:28px 0 64px}
.post-head h1{font-size:clamp(28px,4vw,38px);line-height:1.3;margin-bottom:16px;letter-spacing:-.02em}
.post-meta{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:14px;margin-bottom:28px;padding-bottom:22px;border-bottom:1px solid var(--line)}
.post-body p{color:#4a5a68;font-size:16px;line-height:1.9;margin-bottom:20px}
.post-body h2{font-size:24px;margin:40px 0 16px}
.post-body h3{font-size:18px;margin:28px 0 10px}
.post-body ol{list-style:decimal;padding-left:24px;margin:0 0 20px}
.post-body li{position:static;min-height:auto;margin:0 0 10px;padding:0 0 0 6px;border:none;border-radius:0;background:none;color:#4a5a68}
.post-lead{font-size:17px!important;color:#536273!important;padding:16px 20px;background:var(--soft);border-left:3px solid var(--blue);border-radius:8px;margin-bottom:28px!important}
.post-download{margin:32px 0;padding:28px 24px;background:var(--soft);border-radius:12px;text-align:center}
.card-info{display:grid;grid-template-columns:1fr 1fr;gap:14px 28px;margin:0;align-content:center}
.card-info>div{display:flex;flex-direction:column;gap:3px;padding-bottom:10px;border-bottom:1px solid var(--soft)}
.card-info dt{font-size:12px;color:var(--muted)}
.card-info dd{margin:0;font-size:15px;font-weight:700;color:var(--ink)}
.safe-download-btn>.icon{width:32px;height:32px;flex:none}
.card-download .safe-download-btn{width:100%;min-width:0;min-height:70px;padding:11px 18px}
.card-download .safe-download-copy small{white-space:normal}
.post-cover{margin:0 auto 24px;max-width:440px;border-radius:16px;overflow:hidden;box-shadow:0 20px 50px rgba(35,74,104,.14)}
.post-cover img{width:100%;height:auto;display:block}
@media(max-width:640px){.card-info{grid-template-columns:1fr 1fr}}
.post-body .post-tip{margin:20px 0;padding:14px 18px;border:1px solid #bee5ce;border-radius:8px;background:#effaf3;color:#2d6a4f;font-size:15px}
.post-body a{color:var(--blue);text-decoration:underline}
.post-table{overflow-x:auto;margin:20px 0 28px;border:1px solid var(--line);border-radius:12px}
.post-table table{width:100%;border-collapse:collapse;min-width:560px}
.post-table th,.post-table td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);font-size:15px}
.post-table th{background:#f3f7fa;color:#445365;font-size:13px;font-weight:700}
.post-table td{color:#4a5a68}
.post-table tbody tr:last-child td{border-bottom:none}
.post-body details.faq-item{border-bottom:1px solid var(--line)}
.post-body details.faq-item summary{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 4px;font-size:17px;font-weight:700;cursor:pointer;list-style:none;color:var(--ink)}
.post-body details.faq-item summary::-webkit-details-marker{display:none}
.post-body details.faq-item summary::after{content:"+";font-size:24px;font-weight:400;color:var(--blue);flex:none;line-height:1;transition:transform .2s}
.post-body details.faq-item[open] summary::after{transform:rotate(45deg)}
.post-body details.faq-item p{margin:0 0 20px;padding-right:32px}
.post-body li .inline-shot{margin:14px 0 8px;text-align:center}
.post-body li .inline-shot img{max-width:100%;height:auto;border-radius:10px;border:1px solid var(--line)}
.hero-split{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:stretch;margin-bottom:28px}
.hero-visual{display:flex;flex-direction:column;gap:16px;justify-content:center}
.hero-visual .post-cover{margin:0;max-width:none}
.hero-visual .safe-download-btn{width:100%;min-width:0}
.hero-split .card-info{grid-template-columns:1fr 1fr;gap:14px 16px;align-content:space-between}
.post-body h2 .h2-no{display:inline-block;margin-right:6px;color:var(--blue);font-weight:900}
.post-body h2 .h2-no::after{content:"、"}
@media(max-width:480px){.hero-split{grid-template-columns:1fr}
.hero-visual{flex-direction:row;align-items:center}}
/* 右侧导航 */
.post{max-width:1140px}
.post-head{max-width:calc(100% - 336px)}
.post-layout{display:grid;grid-template-columns:minmax(0,1fr) 268px;gap:68px;align-items:start}
.post-main{min-width:0}
.post-body,.post-side{min-width:0}
.post-side{position:sticky;top:92px;display:flex;flex-direction:column;gap:14px}
.side-card{padding:18px;border:1px solid var(--line);border-radius:14px;background:#fff;box-shadow:0 10px 26px rgba(35,74,104,.05)}
.side-card h3{margin:0 0 12px;font-size:15px;color:var(--ink)}
.side-card ul{margin:0;padding:0;list-style:none}
.side-card li{margin:0}
.side-card a{display:block;padding:9px 0;border-bottom:1px solid var(--soft);font-size:14px;font-weight:600;color:var(--blue);text-decoration:none}
.side-card li:last-child a{border-bottom:0}
.side-card a:hover{color:#1753ad}
@media(max-width:920px){.post{max-width:820px}
.post-head{max-width:none}
.post-head{max-width:none}
.post-layout{grid-template-columns:minmax(0,1fr)}
.post-side{position:static}}
.wrap .hero-split{margin-top:28px}
.safe-download-btn{display:inline-grid;grid-template-columns:26px minmax(0,1fr);align-items:center;gap:11px;min-width:0;min-height:58px;padding:9px 16px;border-radius:8px;text-align:left}
.safe-download-btn>svg{width:26px;height:26px;flex:none;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.safe-download-copy{display:flex;min-width:0;flex-direction:column;align-items:flex-start;justify-content:center;line-height:1.3}
.safe-download-copy strong{font-size:16px;font-weight:800;color:#fff}
.safe-download-copy small{margin-top:3px;font-size:12px;font-weight:600;color:#e8f1ff;opacity:1;white-space:normal}
.hero-visual .safe-download-btn{width:100%}

/* ===== 页脚三栏导航：对齐另三页（5090） ===== */
.btn-light{background:#fff;color:var(--blue)}
.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:50px}
.footer-grid>div:not(.footer-brand){display:flex;flex-direction:column;gap:9px}
.footer-grid strong{margin-bottom:9px;color:#fff}
.footer-grid a{font-size:14px;color:#aab8c4}
.footer-grid a:hover{color:#fff}
.footer-brand img{width:134px;height:auto;max-height:55px;object-fit:contain;padding:0;border-radius:5px;background:#fff}
.footer-brand p{max-width:360px;margin:18px 0;color:#aab8c4}
.footer-brand .btn{width:max-content}
.footer-brand .btn-light{background:var(--blue);color:#fff;border-color:var(--blue);box-shadow:0 10px 24px rgba(46,117,232,.24)}
.footer-brand .btn-light:hover{background:var(--blue-dark);border-color:var(--blue-dark);color:#fff}
.footer-brand .btn-light{background:var(--blue);color:#fff;border-color:var(--blue);box-shadow:0 10px 24px rgba(46,117,232,.24)}
.footer-brand .btn-light:hover{background:var(--blue-dark);border-color:var(--blue-dark);color:#fff}
@media(max-width:1050px){.footer-grid{grid-template-columns:1.3fr 1fr 1fr}
.footer-grid>div:last-child{display:none}}
@media(max-width:800px){.footer-grid{grid-template-columns:1fr 1fr}
.footer-brand{grid-column:1/-1}}
@media(max-width:520px){.footer-grid{grid-template-columns:1fr}
.footer-grid>div{display:flex!important}
.footer-brand{grid-column:auto}}
.footer-grid{display:flex;justify-content:space-between;gap:30px}
@media(max-width:520px){.mid-cta,.footer-grid{align-items:flex-start;flex-direction:column}}