:root{
  --bg:#fffef9;
  --bg-alt:#f2f2f2;
  --ink:#06312e;
  --surface:#ffffff;
  --surface-2:#efefef;
  --line:rgba(6,49,46,.11);
  --text:#171717;
  --muted:#5f625d;
  --dim:#686b66;
  --accent:#0f766e;
  --accent-hover:#0a655e;
  --accent-soft:rgba(15,118,110,.10);
  --accent-bright:#3edab2;
  --btn-2:#efefef;
  --btn-2-hover:#e8e8e8;
  --warn:#b45309;
  --warn-soft:rgba(180,83,9,.10);
  --mono:ui-monospace,SFMono-Regular,Consolas,monospace;
  --nav-h:60px;
  --r-s:12px;
  --r:18px;
  --r-l:24px;
  --pill:980px;
  --button-r:10px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --max:1120px;
  --shadow:0 24px 70px rgba(6,49,46,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{margin:0;padding-top:var(--nav-h);background:var(--bg);color:var(--text);font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit}
button{font:inherit}
::selection{background:var(--accent);color:#fff}
.skip{position:fixed;left:18px;top:-90px;z-index:200;background:var(--accent);color:#fff;padding:10px 18px;border-radius:var(--pill);font-weight:700;text-decoration:none}
.skip:focus{top:12px}
.wrap{width:min(calc(100% - 40px),var(--max));margin-inline:auto}

/* ---- 小标签（统一为无衬线） ---- */
.overline,.section-kicker,.spec-label,.evidence em,.start-card dt,.audience-dims b,.report-grid dt{display:block;font-family:inherit;font-size:12px;font-weight:600;line-height:1.4;letter-spacing:0;text-transform:none;color:var(--accent)}

/* ---- 顶部导航：单栏，桌面端唯一导航 ---- */
.nav{position:fixed;inset:0 0 auto;z-index:100;background:rgba(6,49,46,.96);-webkit-backdrop-filter:saturate(160%) blur(18px);backdrop-filter:saturate(160%) blur(18px);color:#fffef9}
.nav-inner{min-height:var(--nav-h);display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;font-size:13px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.brand-mark{display:grid;place-items:center;width:25px;height:25px;border-radius:8px;background:var(--accent-bright);color:var(--ink);font:800 10px/1 var(--mono)}
.brand em{font-style:normal;color:var(--accent-bright)}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links>a:not(.nav-cta){color:rgba(255,254,249,.78);font-size:12.5px;text-decoration:none;transition:color .2s var(--ease)}
.nav-links>a:not(.nav-cta):hover{color:#fff}
.nav-links>a[aria-current="page"]{color:#fff;text-decoration:underline;text-decoration-color:var(--accent-bright);text-decoration-thickness:2px;text-underline-offset:9px}
.nav-cta{display:inline-flex;align-items:center;justify-content:center;min-height:34px;padding:0 15px;border-radius:var(--button-r);background:var(--accent-bright);color:var(--ink);text-decoration:none;font-size:12px;font-weight:700;transition:background-color .2s var(--ease),transform .2s var(--ease)}
.nav-cta:hover{background:#57dfcd}
.menu{display:none}

/* ---- 主题条：仅移动端显示，替代汉堡菜单 ---- */
.topic-bar{display:none}

/* ---- 按钮 ---- */
.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;border:0;border-radius:var(--button-r);text-decoration:none;font-weight:650;font-size:15px;transition:background-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease)}
.button.primary{background:var(--accent);color:#fff}
.button.primary:hover{background:var(--accent-hover)}
.button.secondary{background:var(--btn-2);color:var(--text)}
.button.secondary:hover{background:var(--btn-2-hover)}
.button:active{transform:scale(.98)}
.button-link{display:inline-flex;align-items:center;min-height:46px;padding:0 6px;color:var(--accent);font-weight:600;font-size:15px;text-decoration:none;transition:color .2s var(--ease)}
.button-link::after,.link-cta::after{content:"›";margin-left:6px;font-size:1.1em;line-height:1}
.button-link:hover{color:var(--accent-hover);text-decoration:underline;text-underline-offset:5px}
.link-cta{display:inline-flex;align-items:center;color:inherit;font-size:14px;font-weight:650;text-decoration:none}
.link-cta:hover{text-decoration:underline;text-underline-offset:5px}
/* 卡片内的入口改为文字链接，减少按钮堆叠 */
.start-card .button,.spec-head .button{min-height:auto;width:auto;padding:0;border-radius:0;background:transparent;color:var(--accent);font-size:14px;justify-content:flex-start}
.start-card .button::after,.spec-head .button::after{content:"›";margin-left:6px;font-size:1.1em;line-height:1}
.start-card .button:hover,.spec-head .button:hover{background:transparent;color:var(--accent-hover);text-decoration:underline;text-underline-offset:5px;transform:none}

/* ---- 首页 Hero：暖色留白、分行入场、单主按钮 ---- */
.hero{padding:110px 0 56px;text-align:center;background:linear-gradient(135deg,#fffef9 0%,#eefbf7 100%)}
.hero-inner{max-width:880px;margin:0 auto}
.hero h1{margin:18px auto 22px;font-size:clamp(44px,5.8vw,72px);line-height:1.04;letter-spacing:-.035em;font-weight:650}
.hero-line{display:block;overflow:hidden}
.hero-line>span{display:inline-block;will-change:transform,opacity}
.hero-word+.hero-word{margin-left:.08em}
.hero-line.is-accent{color:var(--accent)}
.keep{white-space:nowrap}
.hero-copy{max-width:680px;margin:0 auto;color:var(--muted);font-size:clamp(16px,1.6vw,19px)}
.hero-copy strong{color:var(--text);font-weight:600}
.actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:30px}
.hero .actions{justify-content:center}
.hero-note{margin:22px auto 0;color:var(--dim);font-size:12px}

/* ---- 首页证据条 ---- */
.evidence-bar{padding:42px 0 18px;background:var(--bg)}
.evidence-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.evidence{padding:24px 22px 26px;background:var(--surface);border-radius:var(--r);box-shadow:0 10px 28px rgba(6,49,46,.05)}
.evidence em{margin-bottom:12px;font-style:normal}
.evidence strong{display:block;margin-bottom:6px;font:600 24px/1.25 var(--mono);letter-spacing:-.02em;color:var(--text)}
.evidence strong small{font-size:12px;color:var(--accent);letter-spacing:0}
.evidence span{display:block;color:var(--muted);font-size:12.5px;line-height:1.55}

/* ---- 企业 AI 私有化交付架构：原创信息图 ---- */
.system-section{padding:78px 0 88px;background:var(--bg)}
.system-shell{display:grid;grid-template-columns:minmax(0,.78fr) minmax(0,1.55fr);gap:52px;align-items:center;padding:54px;background:var(--ink);border-radius:var(--r-l);color:#fffef9;box-shadow:var(--shadow)}
.system-copy .section-kicker{color:var(--accent-bright)}
.system-copy h2{max-width:500px;margin:16px 0 18px;font-size:clamp(30px,3.5vw,46px);line-height:1.12;letter-spacing:-.03em;font-weight:650;word-break:keep-all;text-wrap:wrap}
.system-copy p{margin:0 0 24px;color:rgba(255,254,249,.70);font-size:15px}
.system-copy .link-cta{color:var(--accent-bright)}
.system-map{margin:0;padding:18px;background:#0a403c;border-radius:20px}
.map-caption{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:14px;padding:2px 4px 0;color:rgba(255,254,249,.66);font-size:11.5px}
.map-caption b{color:#fffef9;font-size:12px;font-weight:650}
.map-tags{display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.map-tags span{padding:5px 9px;border-radius:var(--pill);background:rgba(62,218,178,.12);color:var(--accent-bright);font-size:10.5px}
.map-flow{display:grid;grid-template-columns:minmax(0,1fr) 18px minmax(0,1fr) 18px minmax(0,1fr) 18px minmax(0,1fr);gap:7px;align-items:stretch}
.map-node{min-width:0;padding:18px 14px;background:#fffef9;border-radius:var(--r-s);color:var(--text)}
.map-node.is-core{background:var(--accent-bright);color:var(--ink)}
.map-node small{display:block;margin-bottom:10px;color:var(--accent);font-size:10.5px;font-weight:700}
.map-node.is-core small{color:rgba(6,49,46,.68)}
.map-node b{display:block;margin-bottom:8px;font-size:14px;line-height:1.35;font-weight:700}
.map-node span{display:block;color:var(--muted);font-size:11.5px;line-height:1.55}
.map-node.is-core span{color:rgba(6,49,46,.76)}
.map-arrow{display:grid;place-items:center;color:var(--accent-bright);font-size:17px}
.map-guardrails{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:8px}
.map-guardrails div{padding:12px 13px;background:rgba(255,254,249,.08);border-radius:10px}
.map-guardrails b{display:block;margin-bottom:3px;color:#fffef9;font-size:11px}
.map-guardrails span{display:block;color:rgba(255,254,249,.62);font-size:10.5px;line-height:1.45}

/* ---- 通用小节：居中标题，内容满宽 ---- */
.section{padding:96px 0}
.section.alt{background:var(--bg-alt);--surface:#ffffff;--surface-2:#efefef}
.section-shell{display:block}
.section-side{text-align:center;margin-bottom:10px}
.section-main>h2{max-width:820px;margin:0 auto;text-align:center;font-size:clamp(28px,3.4vw,44px);line-height:1.15;letter-spacing:-.025em;font-weight:650;text-wrap:balance}
.section-intro{max-width:700px;margin:16px auto 44px;text-align:center;color:var(--muted);font-size:16px}
.section-main>.section-intro:first-child{margin-top:0}
.section-note{max-width:700px;margin:28px auto 0;text-align:center;color:var(--dim);font-size:13px}
.section-note a{color:var(--accent);text-underline-offset:4px}

/* ---- 首页：三种启动方式 ---- */
.start-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.start-card{display:flex;flex-direction:column;padding:30px 27px 27px;background:var(--surface);border-radius:var(--r-l)}
.start-card.featured{background:var(--ink);color:#fffef9}
.start-card.featured dt,.start-card.featured .button{color:var(--accent-bright)}
.start-card.featured dd{color:rgba(255,254,249,.68)}
.start-card h3{margin:0 0 16px;font-size:21px;line-height:1.3;letter-spacing:-.015em;font-weight:650}
.start-card dl{flex:1;display:grid;gap:14px;margin:0 0 22px}
.start-card dd{margin:4px 0 0;color:var(--muted);font-size:14px}

/* ---- 首页：交付方法摘要 ---- */
.method-flow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:0;padding:0;list-style:none}
.method-flow li{position:relative;padding:24px 22px 26px;background:var(--surface);border-radius:var(--r)}
.method-flow b{display:block;margin-bottom:6px;font-size:17px;font-weight:650}
.method-flow span{display:block;color:var(--muted);font-size:13.5px}
.method-flow li:not(:last-child)::after{content:"›";position:absolute;right:-13px;top:50%;width:12px;transform:translateY(-50%);color:var(--dim);font-size:18px;line-height:1;text-align:center}

/* ---- 三栏条件 / 判断维度 ---- */
.condition-grid,.judge-row{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.judge-row{margin-bottom:16px}
.condition,.judge-row>div{padding:24px 24px 26px;background:var(--surface);border-radius:var(--r)}
.condition h3,.judge-row b{display:block;margin:0 0 8px;font-size:16px;font-weight:650}
.condition p,.judge-row span{display:block;margin:0;color:var(--muted);font-size:13.5px}

/* ---- 合作判断 ---- */
.fit-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.fit-column{padding:26px 26px 20px;background:var(--surface);border-radius:var(--r-l)}
.fit-column h3{margin:0 0 12px;font-size:19px;font-weight:650}
.fit-column ul{margin:0;padding:0;list-style:none}
.fit-column li{display:grid;grid-template-columns:26px 1fr;gap:12px;padding:13px 0;border-top:1px solid var(--line);color:var(--muted);font-size:14px}
.fit-column li::before{content:"适";display:grid;place-items:center;width:22px;height:22px;border-radius:50%;background:var(--accent-soft);color:var(--accent);font-size:11px;font-weight:700;line-height:1}
.fit-column.caution li::before{content:"缓";background:var(--warn-soft);color:var(--warn)}

/* ---- 服务对象 ---- */
.audience-grid{display:grid;gap:16px}
.audience-card{padding:28px 26px 26px;background:var(--surface);border-radius:var(--r-l)}
.audience-card h3{margin:0 0 18px;font-size:22px;line-height:1.3;letter-spacing:-.015em;font-weight:650}
.audience-dims{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.audience-dims>div{padding:18px 18px 20px;background:var(--surface-2);border-radius:var(--r-s)}
.audience-dims b{margin-bottom:8px}
.audience-dims p{margin:0;color:var(--muted);font-size:13.5px}

/* ---- 服务范围（Scope of Work） ---- */
.spec-list{display:grid;gap:22px}
.service-spec{padding:10px;background:var(--surface);border-radius:var(--r-l)}
.spec-head{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;padding:22px 20px 24px}
.spec-label{margin-bottom:10px}
.spec-head h3{margin:0 0 6px;font-size:25px;line-height:1.3;letter-spacing:-.015em;font-weight:650}
.spec-head p{margin:0;color:var(--muted);font-size:14.5px}
.spec-head .button{flex:0 0 auto;margin-top:6px}
.spec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:0}
.spec-grid>div{padding:20px 20px 22px;background:var(--surface-2);border-radius:var(--r-s)}
.spec-grid dt{margin-bottom:8px;color:var(--text);font-size:13.5px;font-weight:650}
.spec-grid dd{margin:0;color:var(--muted);font-size:13.5px}
.spec-exclude{margin:0;padding:20px 20px 14px;color:var(--muted);font-size:13.5px}
.spec-exclude b{display:inline-block;margin-right:10px;color:var(--warn);font-size:12px;font-weight:600}
.service-note{margin:26px auto 0;max-width:760px;text-align:center;color:var(--dim);font-size:12.5px}
.capability-line{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:16px}
.capability-line span{padding:8px 14px;border-radius:var(--pill);background:var(--surface);color:var(--muted);font-size:12.5px}
.scope-list{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:0;padding:0;list-style:none}
.scope-list li{padding:16px 20px;background:var(--surface);border-radius:var(--r-s);color:var(--text);font-size:14.5px}

/* ---- 项目证据（测试报告） ---- */
.report{padding:10px;background:var(--surface);border-radius:var(--r-l)}
.report-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:10px}
.report-metrics div{padding:22px 22px 24px;background:var(--surface-2);border-radius:var(--r-s)}
.report-metrics strong{display:block;font:600 30px/1.2 var(--mono);letter-spacing:-.02em}
.report-metrics strong small{font-size:13px;color:var(--accent);letter-spacing:0}
.report-metrics span{display:block;margin-top:8px;color:var(--muted);font-size:12.5px}
.report-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:0}
.report-grid>div{padding:20px 22px 22px;background:var(--surface-2);border-radius:var(--r-s)}
.report-grid dt{margin-bottom:8px}
.report-grid dd{margin:0;color:var(--muted);font-size:13.5px}
.report-grid dd b{color:var(--text);font-weight:650}
.standard-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.standard{padding:26px 24px 28px;background:var(--surface);border-radius:var(--r)}
.standard h3{margin:0 0 14px;font-size:17px;font-weight:650}
.standard ul{display:grid;gap:9px;margin:0;padding:0;list-style:none}
.standard li{position:relative;padding-left:16px;color:var(--muted);font-size:14px}
.standard li::before{content:"";position:absolute;left:0;top:.62em;width:6px;height:6px;border-radius:50%;background:var(--accent)}

/* ---- 交付方法（阶段 Gate 表） ---- */
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;padding:6px 24px;background:var(--surface);border-radius:var(--r-l)}
.gate-table{width:100%;min-width:720px;border-collapse:collapse;font-size:13.5px}
.gate-table th,.gate-table td{padding:18px 14px;border-top:1px solid var(--line);text-align:left;vertical-align:top}
.gate-table thead th{border-top:0;padding-top:20px;padding-bottom:8px;color:var(--dim);font-size:12px;font-weight:600}
.gate-table tbody th{font-size:16px;font-weight:650;white-space:nowrap}
.gate-table td{color:var(--muted)}
.gate-table td b{color:var(--accent);font-weight:650;white-space:nowrap}
.callout{margin:0 0 16px;padding:26px 28px;background:var(--accent-soft);border-radius:var(--r-l)}
.callout p{margin:0;color:var(--text);font-size:16px}
.callout p+p{margin-top:10px;color:var(--muted);font-size:14.5px}

/* ---- 服务规则 ---- */
.rule-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.rule{padding:26px 24px 28px;background:var(--surface);border-radius:var(--r)}
.rule h3{margin:0 0 8px;font-size:18px;font-weight:650}
.rule p{margin:0;color:var(--muted);font-size:14px}

/* ---- 常见问题 ---- */
.faq{padding:4px 26px;background:var(--surface);border-radius:var(--r-l)}
.faq details{border-top:1px solid var(--line)}
.faq details:first-child{border-top:0}
.faq summary{cursor:pointer;list-style:none;display:grid;grid-template-columns:40px 1fr 24px;gap:14px;align-items:center;padding:20px 0;font-weight:650;font-size:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"Q";display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--accent-soft);color:var(--accent);font-size:12px;font-weight:700;line-height:1}
.faq summary::after{content:"+";color:var(--dim);font-size:22px;font-weight:300;text-align:right}
.faq details[open] summary::after{content:"−"}
.faq .answer{max-width:790px;padding:0 24px 22px 54px;color:var(--muted);font-size:14.5px}

/* ---- 页尾 CTA：深色居中色块，一主按钮 + 一文字链 ---- */
.final-cta{padding:8px 0 96px}
.final-layout{padding:70px 40px;background:var(--ink);border-radius:var(--r-l);text-align:center;color:#fffef9;box-shadow:var(--shadow)}
.final-cta .overline{color:var(--accent-bright)}
.final-cta h2{max-width:760px;margin:14px auto 12px;font-size:clamp(28px,3.4vw,44px);line-height:1.15;letter-spacing:-.025em;font-weight:650;text-wrap:balance}
.final-cta p{max-width:640px;margin:0 auto;color:rgba(255,254,249,.72);font-size:15px}
.final-cta .actions{justify-content:center;margin-top:28px}
.final-cta .button.primary{background:var(--accent-bright);color:var(--ink)}
.final-cta .button.primary:hover{background:#57dfcd}
.final-cta .button.secondary{background:transparent;color:#fffef9;padding:0 8px}
.final-cta .button.secondary::after{content:"›";margin-left:6px;font-size:1.1em;line-height:1}
.final-cta .button.secondary:hover{background:transparent;color:var(--accent-bright)}

/* ---- Footer ---- */
footer{padding:48px 0 56px;background:var(--bg-alt)}
.footer-grid{display:grid;grid-template-columns:1.45fr .8fr .9fr;gap:50px}
footer .brand{color:var(--text)}
footer .brand-mark{background:var(--ink);color:var(--accent-bright)}
footer .brand em{color:var(--accent)}
.footer-copy{max-width:490px;margin:14px 0 0;color:var(--muted);font-size:12.5px}
.footer-title{margin-bottom:10px;color:var(--text);font-size:12.5px;font-weight:700}
.footer-links{display:grid;gap:7px}
.footer-links a,.placeholder{color:var(--muted);font-size:12.5px;text-decoration:none}
.footer-icp a{color:var(--muted);font-size:12.5px;text-decoration:none}.footer-icp a:hover{color:var(--text);text-decoration:underline}
.footer-links a:hover{color:var(--accent)}
.legal{grid-column:1/-1;margin-top:10px;padding-top:18px;border-top:1px solid var(--line);color:var(--dim);font-size:11.5px}

/* ---- 主题页页头 / 翻页 ---- */
.page-head{padding:72px 0 56px;text-align:center}
.page-head h1{max-width:820px;margin:14px auto 14px;font-size:clamp(32px,4.4vw,56px);line-height:1.12;letter-spacing:-.025em;font-weight:650;text-wrap:balance}
.page-head .lead{max-width:720px;margin:0 auto;color:var(--muted);font-size:16px}
.pager{display:flex;justify-content:space-between;gap:20px;padding:24px 0 40px;font-size:13.5px}
.pager a{color:var(--muted);text-decoration:none;transition:color .2s var(--ease)}
.pager a:hover{color:var(--accent)}
.pager .pager-cta{color:var(--accent);font-weight:600}

/* ---- 移动端 Sticky CTA（仅手机宽度显示） ---- */
.mobile-cta{display:none}
:focus-visible{outline:3px solid rgba(15,118,110,.5);outline-offset:3px}
.nav :focus-visible,.final-layout :focus-visible{outline-color:rgba(45,212,191,.75)}

/* ---- 文字入场：首屏分行，正文滚动进入；减少动态时全部关闭 ---- */
@keyframes hero-line-in{from{opacity:0;transform:translateY(112%)}to{opacity:1;transform:translateY(0)}}
@keyframes hero-rise{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}
.hero-line>span{animation:hero-line-in .92s var(--ease) both}
.hero-line:nth-child(1)>.hero-word:nth-child(1){animation-delay:.10s}
.hero-line:nth-child(1)>.hero-word:nth-child(2){animation-delay:.17s}
.hero-line:nth-child(2)>.hero-word:nth-child(1){animation-delay:.24s}
.hero-line:nth-child(2)>.hero-word:nth-child(2){animation-delay:.31s}
.hero [data-hero-reveal]{animation:hero-rise .78s var(--ease) both}
.hero>.wrap>.overline{animation-delay:.04s}
.hero-copy{animation-delay:.28s!important}
.hero .actions{animation-delay:.38s!important}
.hero-note{animation-delay:.48s!important}
.page-head .overline,.page-head h1,.page-head .lead{animation:hero-rise .78s var(--ease) both}
.page-head .overline{animation-delay:.04s}
.page-head h1{animation-delay:.12s}
.page-head .lead{animation-delay:.22s}
.reveal-ready{opacity:0;transform:translateY(26px);transition:opacity .72s var(--ease),transform .72s var(--ease);transition-delay:var(--reveal-delay,0ms)}
.reveal-ready.is-visible{opacity:1;transform:translateY(0)}

@media(max-width:1020px){
  .spec-grid{grid-template-columns:1fr 1fr}
  .final-layout{padding:52px 32px}
  .system-shell{grid-template-columns:1fr;gap:34px;padding:44px}
}
@media(max-width:820px){
  html{scroll-padding-top:110px}
  .nav-links{display:none}
  .topic-bar{display:flex;position:sticky;top:var(--nav-h);z-index:95;overflow-x:auto;scrollbar-width:none;background:rgba(255,254,249,.94);-webkit-backdrop-filter:saturate(160%) blur(18px);backdrop-filter:saturate(160%) blur(18px);border-bottom:1px solid var(--line)}
  .topic-bar::-webkit-scrollbar{display:none}
  .topic-bar a{flex:0 0 auto;padding:13px 16px;text-decoration:none;color:var(--muted);font-size:13.5px;font-weight:600;white-space:nowrap}
  .topic-bar a[aria-current="page"]{color:var(--text);box-shadow:inset 0 -2px 0 var(--accent)}
  .section{padding:72px 0}
  .start-grid{grid-template-columns:1fr}.method-flow{grid-template-columns:1fr 1fr}.method-flow li:nth-child(2)::after{display:none}
  .audience-dims{grid-template-columns:1fr}
  .spec-head{flex-direction:column;gap:12px}
  .scope-list{grid-template-columns:1fr 1fr}
  .report-metrics strong{font-size:24px}
  .standard-grid,.condition-grid,.judge-row{grid-template-columns:1fr}
  .rule-list{grid-template-columns:1fr}
  .footer-grid{gap:32px}
}
@media(max-width:680px){
  .wrap{width:min(calc(100% - 28px),var(--max))}.nav-inner{gap:10px}
  .hero{padding:60px 0 34px}.hero h1{font-size:38px}.hero-copy{font-size:16px}
  .actions{display:grid;gap:8px}.button,.button-link{width:100%;justify-content:center}.hero-note{font-size:11.5px;line-height:1.7}
  .evidence-bar{padding-top:28px}.evidence-grid{grid-template-columns:1fr 1fr;gap:10px}.evidence{padding:18px 16px 20px;border-radius:var(--r-s)}.evidence em{margin-bottom:8px}
  .system-section{padding:48px 0 58px}.system-shell{gap:28px;padding:30px 18px}.system-copy h2{font-size:29px}.system-map{padding:12px}.map-caption{align-items:flex-start;flex-direction:column}.map-tags{justify-content:flex-start}.map-flow{grid-template-columns:1fr;gap:7px}.map-arrow{height:16px;transform:rotate(90deg)}.map-node{padding:16px}.map-guardrails{grid-template-columns:1fr}
  .section{padding:56px 0}.section-main>h2{font-size:27px}.section-intro{margin-bottom:28px;font-size:15px}
  .page-head{padding:40px 0 32px}.page-head h1{font-size:30px}.page-head .lead{font-size:15px}
  .start-card{padding:24px 20px 22px;border-radius:var(--r)}.start-card .button{width:auto;justify-content:flex-start}
  .method-flow{grid-template-columns:1fr;gap:10px}.method-flow li::after{display:none}
  .fit-grid{grid-template-columns:1fr;gap:12px}.fit-column{padding:22px 20px 14px;border-radius:var(--r)}
  .audience-card{padding:22px 18px 18px;border-radius:var(--r)}.audience-dims{gap:8px}.audience-dims>div{padding:16px}
  .service-spec{padding:8px;border-radius:var(--r)}.spec-head{padding:18px 14px 20px}.spec-head h3{font-size:22px}.spec-head .button{width:auto;justify-content:flex-start}
  .spec-grid{grid-template-columns:1fr;gap:8px}.spec-grid>div{padding:16px}
  .spec-exclude{padding:16px 14px 10px}.spec-exclude b{display:block;margin:0 0 6px}
  .scope-list{grid-template-columns:1fr;gap:8px}
  .report{padding:8px;border-radius:var(--r)}.report-metrics{grid-template-columns:1fr;gap:8px;margin-bottom:8px}.report-metrics div{padding:16px 18px}
  .report-grid{grid-template-columns:1fr;gap:8px}.report-grid>div{padding:16px 18px}
  .table-scroll{padding:4px 18px;border-radius:var(--r)}
  .gate-table{min-width:0}.gate-table thead{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
  .gate-table tr{display:block;padding:18px 0;border-top:1px solid var(--line)}.gate-table tbody tr:first-child{border-top:0}.gate-table tbody th{display:block;padding:0 0 10px;border:0;white-space:normal}
  .gate-table td{display:grid;grid-template-columns:88px 1fr;gap:10px;padding:6px 0;border:0}.gate-table td::before{content:attr(data-label);padding-top:2px;color:var(--dim);font-size:11.5px;font-weight:600}
  .callout{padding:20px 18px;border-radius:var(--r)}
  .faq{padding:2px 16px;border-radius:var(--r)}.faq summary{grid-template-columns:36px 1fr 20px;gap:10px;font-size:15px}.faq .answer{padding:0 8px 20px 46px}
  .pager{padding:20px 0 28px}
  .final-cta{padding-bottom:56px}.final-layout{padding:40px 22px;border-radius:var(--r)}
  footer{padding-bottom:104px}.footer-grid{grid-template-columns:1fr}.legal{grid-column:auto}
  .mobile-cta{display:block;position:fixed;z-index:90;left:14px;right:14px;bottom:max(12px,env(safe-area-inset-bottom));padding:14px 18px;background:var(--accent);border-radius:var(--pill);color:#fff;text-align:center;text-decoration:none;font-weight:600;font-size:15px;box-shadow:0 10px 30px rgba(0,0,0,.2);transition:transform .25s var(--ease),opacity .25s var(--ease)}
  .mobile-cta.is-hidden{transform:translateY(140%);opacity:0;pointer-events:none}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button,.button-link,.nav-cta,.topic-bar a,.mobile-cta,.nav-links>a,.pager a,.reveal-ready{transition:none}.hero-line>span,.hero [data-hero-reveal],.page-head .overline,.page-head h1,.page-head .lead{animation:none}.reveal-ready{opacity:1;transform:none}}