/* Anvilstead V1.3 — engineering case studies. Existing V1.2 homepage style is untouched. */
:root{--v13-ink:#0d252f;--v13-night:#07151d;--v13-mint:#b8e8e5;--v13-orange:#e69d62}
html{scroll-padding-top:90px}
.case-hero-jump{display:inline-flex;align-items:center;gap:35px;color:#fff;font-size:12px;font-weight:600;letter-spacing:.025em;text-decoration:none;border:1px solid #ffffff7d;padding:15px 18px;margin-top:29px;background:#07172366;backdrop-filter:blur(8px);border-radius:3px;transition:.25s}
.case-hero-jump:hover{background:#fff;color:#0c2630;gap:46px}
.case-hero-jump span{font-size:18px}
.v13-intro,.v13-engineering,.v13-credibility{position:relative;overflow:hidden}
.v13-intro{background:#0a1821;color:#f0f4f1;padding:112px 0 115px}
.v13-intro:before{content:"";position:absolute;left:-18%;top:120px;width:50vw;height:55vw;border-radius:50%;background:#0f6e8321;filter:blur(100px);pointer-events:none}
.v13-section-top{position:relative;display:flex;align-items:center;justify-content:space-between;gap:20px;border-top:1px solid #8aabb455;padding-top:20px;font-size:10px;font-weight:600;letter-spacing:.18em}
.v13-intro .v13-section-top{color:#98bbc0}.v13-engineering .v13-section-top{color:#789197}
.v13-kicker{font-size:10px;color:inherit}
.v13-title-row{position:relative;display:grid;grid-template-columns:minmax(0,1.25fr) minmax(300px,.65fr);gap:12%;align-items:end;margin:40px 0 70px}
.v13-title-row h2{max-width:820px;font-size:clamp(45px,5.7vw,92px);font-weight:500;line-height:1.02;letter-spacing:-.068em;text-wrap:balance}
.v13-eyebrow{font-size:10px;font-weight:650;letter-spacing:.16em;color:#6f9ea6;text-transform:uppercase}
.v13-title-row p{font-size:clamp(15px,1.3vw,18px);line-height:1.8;color:#b5c8cc;margin:12px 0 0;max-width:430px}
.showcase-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.7fr) minmax(300px,.65fr);gap:0;min-height:560px;background:#0b222e;border:1px solid #ffffff21;border-radius:10px;overflow:hidden;box-shadow:0 60px 90px #0002}
.showcase-picture{min-width:0;min-height:580px;display:flex;position:relative;overflow:hidden}
.showcase-art{position:relative;flex:1;min-height:100%;overflow:hidden;isolation:isolate}
.art-stamp{position:absolute;bottom:22px;left:30px;right:30px;z-index:6;display:flex;align-items:center;justify-content:space-between;border-top:1px solid #ffffff32;padding-top:12px;color:#d4e4e5a3;font-size:10px;letter-spacing:.15em;font-weight:600}
.art-stamp span{color:#e4ecea;font-size:21px}
.scene-choices{padding:50px 36px 38px;background:#f1f2ed;color:#18333c;display:flex;flex-direction:column;align-items:flex-start;justify-content:center;position:relative}
.scene-choices:before{content:"";position:absolute;left:0;top:42px;bottom:42px;width:1px;background:#647f8866}
.panel-mini{font-size:10px;color:#6d8388;letter-spacing:.17em;font-weight:680}
.scene-choices h3{font-size:clamp(28px,2.4vw,39px);line-height:1.12;font-weight:540;letter-spacing:-.055em;margin:27px 0 15px}
.scene-intro{font-size:15px;line-height:1.65;color:#687d83;min-height:76px;max-width:250px}
.scene-tabs{display:flex;flex-direction:column;gap:8px;width:100%;margin-top:29px}
.scene-tab{display:flex;align-items:center;text-align:left;width:100%;padding:14px 16px;color:#24424a;background:#e5e9e5;border:1px solid #d6dfdc;cursor:pointer;border-radius:4px;font-weight:620;font-size:12px;transition:.2s}
.scene-tab:after{content:"↗";margin-left:auto;font-size:15px;color:#7d9495}
.scene-tab:hover{background:#dae6e3}.scene-tab.is-active,.scene-tab[aria-pressed="true"]{background:#173946;border-color:#173946;color:white}.scene-tab.is-active:after{color:#b0e7e1}
.scene-tab:focus-visible{outline:3px solid #3e9faa;outline-offset:3px}
.scene-disclaimer{font-size:11px;color:#7b8d91;line-height:1.7;margin-top:32px;max-width:260px}
.visual-clarity{margin-top:24px;display:flex;gap:14px;align-items:flex-start;max-width:900px;color:#94afb8;font-size:12px;line-height:1.7}
.visual-clarity strong{color:#b7d0d2;font-weight:650}.clarity-dot{flex:0 0 8px;background:#dca36f;width:8px;height:8px;border-radius:50%;margin-top:7px}
/* Dayu: CSS-only exploratory phone devices; no real screenshots claimed */
.dayu-art{background:radial-gradient(ellipse at 53% 45%,#255068 0%,#123646 34%,#061722 75%)}
.dayu-art:before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(90deg,transparent 0 61px,#9cdce90a 62px 63px);opacity:.35}
.ambient{position:absolute;border-radius:50%;filter:blur(22px);pointer-events:none}.ambient-cyan{width:350px;height:350px;left:18%;top:28%;background:#43b3c741}
.device-shadow{position:absolute;top:80%;width:60%;height:100px;background:#000a;filter:blur(30px);left:25%}
.phone-back,.phone-front{position:absolute;background:#050c14;border:7px solid #889faa;border-radius:37px;width:248px;height:474px;box-shadow:16px 28px 50px #0009;overflow:hidden}
.phone-back{left:12%;top:22%;transform:rotate(-17deg) scale(.9);border-color:#446276}
.phone-front{left:40%;top:12%;transform:rotate(8deg);z-index:2;border-color:#adc9ce}
.device-top{height:20px;background:#071520;display:flex;justify-content:center;align-items:flex-start}.bar-notch{display:block;width:70px;height:9px;border-radius:0 0 15px 15px;background:#000}
.back-visual{height:100%;position:relative;background:linear-gradient(160deg,#171e42,#275067 60%,#051822);color:#d7fafa;display:flex;align-items:end;padding:0 26px 75px;font-size:29px;font-weight:700;line-height:1.15;letter-spacing:-.06em}
.big-circle{position:absolute;top:26%;left:13%;width:190px;height:190px;border-radius:50%;border:1px solid #80f7f7aa;box-shadow:inset 0 0 50px #b4f9ff66,0 0 50px #40cbe966;background:radial-gradient(circle at 30% 35%,#c7faf9bb,#2b9bba33 60%,transparent)}
.device-screen{background:#eaf0ee;color:#163943;height:calc(100% - 20px);padding:28px 18px 10px;display:flex;flex-direction:column}
.mini-overline{font-size:8px;letter-spacing:.13em;font-weight:720;color:#62969e}.phone-heading{font-size:28px;font-weight:690;letter-spacing:-.06em;margin:17px 0 4px}.phone-desc{font-size:9px;color:#647b85;line-height:1.6;min-height:30px}.demo-avatar-row{display:flex;gap:9px;margin:20px 0}.demo-avatar-row span{width:33px;height:33px;display:grid;place-items:center;background:#b5dcda;color:#194652;border-radius:50%;font-size:11px;font-weight:700}.demo-avatar-row span:nth-child(even){background:#e5c4b7}
.phone-demo-content{display:flex;flex-direction:column;gap:8px}.demo-feed-card{display:flex;align-items:center;gap:10px;background:#fff;padding:12px 8px;border-radius:8px;border:1px solid #dbe6e6}.demo-feed-icon{width:31px;height:31px;border-radius:8px;background:#d7e8e9;color:#2d8592;display:grid;place-items:center}.demo-feed-card b{font-size:10px;display:block}.demo-feed-card small{font-size:8px;color:#72848a}.demo-feed-card.muted{background:#eef4f2}.phone-tabbar{margin-top:auto;display:flex;justify-content:space-around;align-items:center;font-size:16px;padding:9px 0;border-top:1px solid #d6e2e2;color:#66949c}
/* Jiewen: orchestrated nodes */
.jiewen-art{background:radial-gradient(ellipse at 54% 45%,#22394a 0%,#0c2230 49%,#06131d 82%)}
.jiewen-art:after{content:"";position:absolute;inset:0;background-image:radial-gradient(#ffffff3a 1px,transparent 1px);background-size:43px 43px;mask-image:radial-gradient(ellipse,black,transparent 76%);opacity:.35}
.halo-orbit{position:absolute;border:1px solid #90b0b047;border-radius:50%;width:560px;height:350px;top:22%;left:50%;transform:translateX(-50%) rotate(-23deg)}.halo-orbit.two{transform:translateX(-50%) rotate(24deg);border-color:#f3ad6470}
.agent-core{position:absolute;z-index:2;width:220px;height:220px;top:29%;left:50%;transform:translateX(-50%);border-radius:50%;background:radial-gradient(circle at 31% 24%,#f8ffffaa 0%,#6d9cab29 14%,transparent 42%),radial-gradient(circle at 60% 65%,#f3b56fba 0%,#9b503b72 24%,#153246cc 51%,#060e16 79%);box-shadow:inset -20px -20px 48px #0009,inset 17px 14px 22px #ffffff43,0 0 70px #e0a56b6e;display:flex;flex-direction:column;align-items:center;justify-content:center;color:white;border:1px solid #aacfd1c4}
.agent-core strong{font-size:54px;font-weight:450;letter-spacing:-.08em}.agent-core span{font-size:8px;letter-spacing:.15em;color:#c7d7d4}
.agent-glint{position:absolute;inset:20px;border:1px solid #ffdfae43;border-radius:50%}
.agent-branch{position:absolute;z-index:4;color:#c7d9dc;font-size:9px;font-weight:650;letter-spacing:.11em;display:flex;align-items:center;gap:10px}.agent-branch i{width:31px;height:31px;border-radius:50%;display:block;background:radial-gradient(circle at 30% 25%,#ffffffd7,#60879789 27%,#1a3549 58%,#081720);border:1px solid #d6f6fa75;box-shadow:0 0 21px #61bdd440}.branch-a{top:15%;left:15%}.branch-b{top:13%;right:8%}.branch-c{top:53%;left:6%}.branch-d{top:69%;right:6%}.branch-e{top:78%;left:23%}
/* JINKA: browser-like commerce vignette */
.jinka-art{background:radial-gradient(ellipse at 45% 65%,#5a6e72 0%,#20313c 54%,#101b25 100%);display:flex;align-items:center;justify-content:center;padding:26px}
.commerce-window{position:relative;z-index:2;background:#f3f5f2;color:#142d38;width:100%;max-width:765px;min-height:435px;box-shadow:0 34px 75px #0008;border:1px solid #c7dcdf7c;border-radius:9px;overflow:hidden}
.commerce-top{height:47px;padding:0 18px;display:flex;align-items:center;justify-content:space-between;background:#fff;border-bottom:1px solid #dbe4e4;color:#48656b;font-size:9px;letter-spacing:.12em;font-weight:700}
.commerce-layout{display:grid;grid-template-columns:1.15fr .85fr;min-height:387px}
.commerce-image{position:relative;overflow:hidden;background:#142732}.commerce-image img{width:100%;height:100%;position:absolute;inset:0;object-fit:cover}.commerce-image:after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,#07131dcc,transparent 60%)}.commerce-image small{position:absolute;bottom:14px;left:12px;right:10px;z-index:2;color:#d9e3e6;font-size:8px;letter-spacing:.08em}
.commerce-info{padding:29px 20px;display:flex;flex-direction:column;gap:10px}.commerce-info h3{font-size:27px;font-weight:620;letter-spacing:-.052em;line-height:1.08;margin:8px 0 2px}.commerce-info p{font-size:11px;line-height:1.6;color:#687c82}.commerce-spec{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:10px;border-top:1px solid #d7e2e0;padding:10px 0;color:#71868a}.commerce-spec b{font-size:10px;color:#204551;font-weight:600;text-align:right}.commerce-action{display:inline-flex;background:#142d39;color:white;padding:11px 14px;font-size:10px;font-weight:650;justify-content:space-between;margin-top:auto;border-radius:3px}.commerce-info>small{font-size:8px;color:#849396}.commerce-info[dir="rtl"] .commerce-spec b{text-align:left}
/* Xiaomei: calm exploratory interaction */
.xiaomei-art{background:radial-gradient(ellipse at 45% 45%,#a88475 0%,#55413a 36%,#121b20 88%)}
.xiaomei-art>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.73;filter:saturate(.8);}
.xiaomei-art:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,#091a1bb8,transparent 50%,#091a1b7c);z-index:1}
.personality-panel{position:absolute;z-index:2;left:6%;top:15%;width:min(340px,65%);padding:24px;background:#071821bf;border:1px solid #ffffff58;backdrop-filter:blur(16px);color:#e8f1ef;border-radius:5px}.personality-panel .mini-overline{color:#eccead}.personality-quote{font-family:Georgia,serif;font-size:clamp(20px,2.5vw,32px);line-height:1.25;margin:24px 0 34px}.personality-meta{display:flex;gap:9px;align-items:center;font-size:9px;letter-spacing:.13em;color:#b8d0cb}.mini-pulse{width:8px;height:8px;border-radius:50%;background:#e8ae78;box-shadow:0 0 15px #f8ce92}
/* Architecture and credibility */
.v13-engineering{padding:122px 0 130px;background:#f1f2ee;color:#12323b}
.v13-eng-head{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(260px,.65fr);gap:8%;align-items:end;margin:46px 0 72px}
.v13-eng-head h2{font-size:clamp(43px,5.6vw,84px);font-weight:500;letter-spacing:-.065em;line-height:1.03}
.v13-eng-head h2 em,.proof-top h2 em{font-family:Georgia,serif;font-weight:400;color:#669b9f}
.v13-eng-head>p{font-size:16px;line-height:1.8;color:#658088;max-width:400px}
.architecture-flow{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));margin-bottom:96px;gap:10px}
.architecture-step{position:relative;min-height:195px;border:1px solid #ccd9d7;background:#fff;padding:21px 17px 25px;transition:transform .25s,box-shadow .25s}
.architecture-step:hover{transform:translateY(-5px);box-shadow:0 20px 40px #23475316}
.architecture-step:not(:last-child):after{content:"→";position:absolute;right:-17px;top:36px;z-index:2;color:#347380;font-size:19px;background:#f1f2ee;border-radius:50%;width:25px;height:25px;display:grid;place-items:center}
.arch-index{display:block;color:#76a5a9;font-size:12px;letter-spacing:.15em;margin-bottom:42px}.arch-node-title{font-weight:650;font-size:17px;letter-spacing:-.03em}.arch-node p{font-size:12px;line-height:1.6;color:#71858a;margin-top:9px}
.v13-two-col{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(290px,.8fr);gap:12%;align-items:start}
.eng-copy h3{font-size:clamp(34px,3.6vw,56px);line-height:1.1;letter-spacing:-.057em;font-weight:500;margin:23px 0 26px;max-width:600px}.eng-copy p{font-size:17px;line-height:1.8;color:#5b7580;max-width:650px;margin-bottom:19px}
.scope-panel{padding:38px;background:#15343e;color:#f4f7f4;box-shadow:20px 25px 55px #0b333227}.scope-panel .v13-eyebrow{color:#91c7cc}.scope-panel h3{font-size:39px;font-weight:530;letter-spacing:-.055em;line-height:1.07;margin:20px 0 27px}.scope-panel ul{list-style:none;margin:0;padding:0}.scope-panel li{display:flex;gap:12px;align-items:baseline;border-top:1px solid #ffffff2b;padding:13px 0;font-size:13px;color:#d5e1e0}.scope-icon{color:#99e5e0;flex:none}.scope-tech{border-top:1px solid #ffffff55;margin-top:25px;padding-top:22px}.scope-tech p{font-size:13px;line-height:1.75;color:#c7d8d8;margin-top:13px}
.v13-credibility{background:#0a1921;color:#eff4f1;padding:111px 0 105px}.proof-top{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:end;gap:35px;margin-bottom:60px}.proof-top h2{font-size:clamp(45px,5.3vw,83px);font-weight:500;letter-spacing:-.067em;line-height:1.05}.proof-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid #ffffff3d;border-bottom:1px solid #ffffff3d}.proof-grid article{padding:33px 37px 42px 0}.proof-grid article:not(:last-child){border-right:1px solid #ffffff24;margin-right:37px}.proof-grid article>span{color:#87b4b9;font-size:10px;letter-spacing:.16em}.proof-grid h3{font-size:26px;letter-spacing:-.05em;font-weight:520;line-height:1.1;margin:28px 0 18px}.proof-grid p{font-size:13px;line-height:1.8;color:#9cb6bc;max-width:370px}.proof-actions{display:flex;align-items:center;gap:28px;flex-wrap:wrap;margin-top:53px}.proof-actions .btn{padding:17px 22px;background:#eef3ef;color:#112b35;text-decoration:none;display:inline-flex;gap:35px;border-radius:3px;font-size:12px;font-weight:680}.proof-actions .btn:hover{background:#aee4e2}.proof-link{color:#c5dade;font-size:13px;text-decoration:none}.proof-link:hover{text-decoration:underline}
.v13-work-context{display:flex;align-items:center;justify-content:space-between;gap:35px;padding:20px 0 35px;border-top:1px solid #c8d4d1}.v13-work-context>span{flex:0 0 36%;font-size:10px;color:#38727d;font-weight:700;letter-spacing:.15em}.v13-work-context p{max-width:650px;font-size:14px;line-height:1.7;color:#5d767c}.v13-card-chip{display:inline-block;margin-top:13px;color:#ccf0e7;font-size:11px;letter-spacing:.035em;border-bottom:1px solid #a5cfc560;padding-bottom:5px}
@media(min-width:1540px){.showcase-picture{min-height:640px}.phone-front{left:43%;top:16%}.phone-back{top:20%;left:19%}}
@media(max-width:1080px){.v13-title-row,.v13-eng-head{gap:5%}.showcase-grid{grid-template-columns:1.35fr minmax(270px,.8fr)}.phone-front{left:40%}.phone-back{left:9%}.scene-choices{padding:33px 24px}.showcase-picture{min-height:540px}.commerce-layout{grid-template-columns:1fr}.commerce-window{max-width:430px}.commerce-image{height:220px}.commerce-info{min-height:220px}.commerce-window{min-height:0}.commerce-info h3{font-size:23px}.architecture-step{padding:17px 12px}.v13-two-col{gap:6%}}
@media(max-width:760px){.v13-intro,.v13-engineering,.v13-credibility{padding:77px 0 80px}.v13-section-top{flex-wrap:wrap;gap:12px}.v13-title-row,.v13-eng-head,.v13-two-col{display:block}.v13-title-row{margin:33px 0 38px}.v13-title-row h2{font-size:clamp(45px,10vw,67px)}.v13-title-row>div+div{margin-top:30px}.v13-title-row p{max-width:600px}.showcase-grid{display:flex;flex-direction:column}.showcase-picture{min-height:500px}.showcase-art{min-height:500px}.scene-choices:before{display:none}.scene-choices{padding:30px 26px}.scene-choices h3{margin:17px 0 12px}.scene-intro{min-height:0;max-width:initial}.scene-tabs{flex-direction:row;flex-wrap:wrap;margin-top:20px}.scene-tab{width:auto;flex:1 1 auto;justify-content:center;gap:20px}.scene-tab:after{margin-left:0}.scene-disclaimer{max-width:initial;margin-top:18px}.visual-clarity{margin-top:18px}.phone-front{left:45%;top:8%}.phone-back{left:9%;top:18%}.v13-eng-head{margin:35px 0}.v13-eng-head h2{font-size:clamp(42px,10vw,65px)}.v13-eng-head>p{margin-top:30px}.architecture-flow{grid-template-columns:repeat(2,minmax(0,1fr));margin-bottom:55px}.architecture-step{min-height:142px}.architecture-step:after{display:none!important}.arch-index{margin-bottom:24px}.scope-panel{margin-top:45px}.proof-top{margin-bottom:35px}.proof-grid{grid-template-columns:1fr}.proof-grid article{padding:23px 0 30px!important;margin:0!important;border-right:0!important}.proof-grid article+article{border-top:1px solid #ffffff2b}.proof-grid h3{margin:15px 0 10px}.proof-actions{align-items:stretch;gap:21px}.proof-link{display:block}.v13-work-context{display:block}.v13-work-context p{margin-top:15px}}
@media(max-width:430px){.v13-title-row h2{font-size:45px}.showcase-picture,.showcase-art{min-height:465px}.phone-front,.phone-back{width:212px;height:407px;border-width:6px;border-radius:32px}.phone-front{left:39%;top:8%}.phone-back{left:2%;top:20%}.device-screen{padding:19px 13px 10px}.phone-heading{font-size:25px;margin-top:10px}.demo-avatar-row{margin:13px 0}.back-visual{font-size:25px}.big-circle{width:156px;height:156px}.agent-core{width:155px;height:155px;top:35%}.agent-core strong{font-size:38px}.halo-orbit{width:380px;height:260px;left:49%;top:30%}.agent-branch{font-size:7px}.agent-branch i{width:24px;height:24px}.branch-a{left:5%;top:18%}.branch-b{right:4%;top:17%}.branch-c{left:3%;top:60%}.branch-d{right:3%;top:74%}.branch-e{left:15%;top:81%}.jinka-art{padding:14px}.commerce-top{font-size:8px}.commerce-image{height:180px}.commerce-info{padding:18px;min-height:240px}.commerce-info h3{font-size:24px}.commerce-info p{font-size:10px}.personality-panel{width:79%;left:7%;top:10%}.architecture-flow{grid-template-columns:1fr 1fr;gap:8px}.architecture-step{padding:13px}.arch-node-title{font-size:14px}.arch-node p{font-size:11px}.scope-panel{padding:26px}.art-stamp{left:17px;right:17px;bottom:14px;font-size:8px}.scene-tabs .scene-tab{font-size:11px;padding:10px}}
@media(prefers-reduced-motion:reduce){.architecture-step,.scene-tab,.case-hero-jump{transition:none!important}}