/* ==========================================================================
   Tobie — portfolio design system "Annotated"
   Spec: docs/design-system.md. Tokens first, then components.
   Rule of the system: portfolio chrome annotates; product surfaces are never
   re-skinned. Anything inside .product keeps the original product's look.
   ========================================================================== */

/* ---------- 1. Type ---------- */
@font-face{font-family:'Atkinson Hyperlegible Next';src:url(/assets/fonts/AtkinsonHyperlegibleNext-latin.woff2) format('woff2');font-weight:200 800;font-style:normal;font-display:swap;unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Atkinson Hyperlegible Next';src:url(/assets/fonts/AtkinsonHyperlegibleNext-latin-ext.woff2) format('woff2');font-weight:200 800;font-style:normal;font-display:swap;unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Atkinson Hyperlegible Next';src:url(/assets/fonts/AtkinsonHyperlegibleNext-Italic-latin.woff2) format('woff2');font-weight:200 800;font-style:italic;font-display:swap;unicode-range:U+0000-00FF,U+2000-206F}
@font-face{font-family:'Atkinson Hyperlegible Mono';src:url(/assets/fonts/AtkinsonHyperlegibleMono-latin.woff2) format('woff2');font-weight:200 800;font-display:swap;unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Atkinson Hyperlegible Mono';src:url(/assets/fonts/AtkinsonHyperlegibleMono-latin-ext.woff2) format('woff2');font-weight:200 800;font-display:swap;unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}

/* ---------- 2. Tokens ---------- */
:root{
  /* colour — sampled from Tobie's own material: deck teal, penguin ink, penguin beak */
  --canvas:#ECF0ED;      /* page: the working canvas */
  --frame:#FFFFFF;       /* surfaces that hold work */
  --ink:#0E2A27;         /* penguin ink */
  --ink-2:#44605B;       /* secondary text  (6.8:1 on frame) */
  --ink-3:#566A63;       /* captions, meta  (5.0:1 on canvas) */
  --rule:#CBD5D0;        /* hairlines */
  --rule-strong:#9FB0A9;
  --teal:#086D70;        /* deck teal — annotation, links, callouts */
  --teal-deep:#05504F;
  --teal-wash:#DCEDEA;
  --beak:#F7775F;        /* penguin beak — "Tobie's note", focus halo. Never text on light. */
  --beak-wash:#FDE6DF;
  --structure:#7B61FF;   /* structure mode only */
  /* project tags — sampled from each product's own UI, used only as 8px identifiers */
  --p-qingju:#10D0B0;--p-playbook:#F95757;--p-app:#4D21E8;--p-smt:#4E71FF;--p-fridge:#264846;--p-tobie:var(--beak);--p-explore:#8A9A94;

  /* type */
  --sans:'Atkinson Hyperlegible Next','PingFang SC','Hiragino Sans GB','Noto Sans SC','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  --mono:'Atkinson Hyperlegible Mono','PingFang SC','Hiragino Sans GB','Noto Sans SC',ui-monospace,'SFMono-Regular',Menlo,monospace;
  --fs-display:clamp(2.75rem,1.2rem + 4.6vw,4.75rem);  /* 44 → 76 */
  --fs-h1:clamp(2.25rem,1.3rem + 2.8vw,3.5rem);          /* 36 → 56 */
  --fs-h2:clamp(1.75rem,1.2rem + 1.4vw,2.25rem);         /* 28 → 36 */
  --fs-h3:1.375rem;                                       /* 22 */
  --fs-lead:clamp(1.125rem,1rem + .4vw,1.3125rem);        /* 18 → 21 */
  --fs-body:1.125rem;                                     /* 18 */
  --fs-small:.9375rem;                                    /* 15 */
  --fs-label:.8125rem;                                    /* 13 mono */
  --fs-micro:.75rem;                                      /* 12 mono */

  /* space (4-based) */
  --s-1:4px;--s-2:8px;--s-3:12px;--s-4:16px;--s-5:24px;--s-6:32px;--s-7:48px;--s-8:64px;--s-9:96px;--s-10:128px;

  /* shape & depth */
  --r-frame:6px;--r-card:10px;--r-pill:999px;--r-phone:34px;
  --shadow-frame:0 0 0 1px rgba(14,42,39,.08),0 18px 40px -26px rgba(14,42,39,.42);
  --shadow-lift:0 0 0 1px rgba(14,42,39,.10),0 26px 50px -26px rgba(14,42,39,.5);

  /* motion */
  --ease:cubic-bezier(.2,.7,.2,1);--t-fast:160ms;--t-state:280ms;--t-reveal:600ms;

  /* layout */
  --max:1200px;--gutter:24px;--margin:48px;
}
@media (max-width:1100px){:root{--margin:32px}}
@media (max-width:700px){:root{--margin:20px;--gutter:16px}}

/* ---------- 3. Base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px;-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{margin:0;background:var(--canvas);color:var(--ink);font-family:var(--sans);font-size:var(--fs-body);line-height:1.65;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
:lang(zh-CN) body,body:lang(zh-CN){line-height:1.8}
img,video{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer;background:none;border:0;padding:0}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.12;letter-spacing:-.015em;text-wrap:balance}
:lang(zh-CN) :is(h1,h2,h3,h4){letter-spacing:0;font-weight:700;line-height:1.3}
p{margin:0}
p,li{text-wrap:pretty}
::selection{background:var(--teal-wash)}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px;box-shadow:0 0 0 6px rgba(247,119,95,.55);border-radius:4px}
[hidden]{display:none!important}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip{position:fixed;left:var(--s-4);top:-80px;z-index:100;background:var(--ink);color:#fff;padding:10px 16px;border-radius:var(--r-pill);font-weight:700}
.skip:focus{top:var(--s-4)}
.wrap{width:min(var(--max),100% - 2*var(--margin));margin-inline:auto}

/* ---------- 4. Type roles ---------- */
.label{font-family:var(--mono);font-size:var(--fs-label);line-height:1.4;letter-spacing:.04em;text-transform:uppercase;color:var(--ink-2);font-weight:500}
:lang(zh-CN) .label{text-transform:none;letter-spacing:.06em}
.label--teal{color:var(--teal)}
.meta{font-family:var(--mono);font-size:var(--fs-micro);line-height:1.5;color:var(--ink-3)}
.lead{font-size:var(--fs-lead);line-height:1.6;color:var(--ink-2)}
.path{display:flex;flex-wrap:wrap;gap:6px 12px}
.path>span+span::before{content:'/';margin-right:12px;color:var(--rule-strong)}

/* ---------- 5. Top bar ---------- */
.topbar{position:sticky;top:0;z-index:40;background:rgba(236,240,237,.9);backdrop-filter:saturate(1.2) blur(12px);-webkit-backdrop-filter:saturate(1.2) blur(12px);border-bottom:1px solid transparent;transition:border-color var(--t-state)}
.topbar.is-scrolled{border-color:var(--rule)}
.topbar__inner{height:68px;display:flex;align-items:center;justify-content:space-between;gap:var(--s-5)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.3rem;letter-spacing:-.01em}
.brand__dot{width:11px;height:11px;border-radius:50%;background:var(--beak);box-shadow:0 0 0 2px var(--canvas),0 0 0 3px var(--ink)}
.brand__sub{font-family:var(--mono);font-weight:400;font-size:var(--fs-micro);color:var(--ink-3);letter-spacing:.02em;margin-left:4px}
.nav{display:flex;align-items:center;gap:6px;font-size:var(--fs-small)}
.nav a{padding:8px 12px;border-radius:var(--r-pill);transition:background var(--t-fast)}
.nav a:hover{background:rgba(14,42,39,.06)}
.nav a[aria-current="page"]{background:var(--frame);box-shadow:inset 0 0 0 1px var(--rule)}
.nav .nav__lang{font-family:var(--mono);font-size:var(--fs-label);box-shadow:inset 0 0 0 1px var(--rule-strong);margin-left:6px}
.menu-btn{display:none;height:40px;padding:0 14px;border-radius:var(--r-pill);box-shadow:inset 0 0 0 1px var(--rule-strong);font-family:var(--mono);font-size:var(--fs-label)}

/* ---------- 6. Buttons & links ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:0 22px;border-radius:var(--r-pill);background:var(--ink);color:#fff;font-weight:700;font-size:1rem;line-height:1.2;transition:transform var(--t-fast) var(--ease),background var(--t-fast)}
.btn:hover{background:var(--teal-deep);transform:translateY(-1px)}
.btn--ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--ink)}
.btn--ghost:hover{background:var(--frame);color:var(--ink)}
.btn--small{min-height:40px;padding:0 16px;font-size:var(--fs-small)}
.link{color:var(--teal);font-weight:700;text-decoration:underline;text-decoration-thickness:1.5px;text-underline-offset:4px}
.link:hover{color:var(--teal-deep);text-decoration-thickness:2.5px}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-weight:700;color:var(--ink);border-bottom:1.5px solid currentColor;padding-bottom:2px}
.link-arrow span{transition:transform var(--t-fast) var(--ease)}
.link-arrow:hover{color:var(--teal)}
.link-arrow:hover span{transform:translateX(3px)}
.chips{display:flex;flex-wrap:wrap;gap:6px;list-style:none;margin:0;padding:0}
.chip{font-family:var(--mono);font-size:var(--fs-micro);line-height:1;padding:7px 10px;border-radius:var(--r-pill);box-shadow:inset 0 0 0 1px var(--rule-strong);color:var(--ink-2);background:rgba(255,255,255,.55)}

/* ---------- 7. Frame: the container for real work ---------- */
.frame-block{margin:0}
.frame-label{display:flex;align-items:baseline;justify-content:space-between;gap:var(--s-4);margin:0 2px var(--s-2);font-family:var(--mono);font-size:var(--fs-micro);line-height:1.4;color:var(--ink-2)}
.frame-label__name{display:flex;align-items:center;gap:8px;min-width:0}
.frame-label__name::before{content:'';flex:none;width:8px;height:8px;border-radius:2px;background:var(--project,var(--ink-3))}
.frame-label__name span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.prov{flex:none;font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;padding:3px 7px;border-radius:3px;background:var(--frame);box-shadow:inset 0 0 0 1px var(--rule);color:var(--ink-2)}
:lang(zh-CN) .prov{letter-spacing:.08em}
.prov--team{background:#F3F1EA;color:#6A5B2E;box-shadow:inset 0 0 0 1px #DED6BE}
.prov--live{background:var(--teal-wash);color:var(--teal-deep);box-shadow:inset 0 0 0 1px #A9D2CC}
.prov--retro{background:var(--beak-wash);color:#8A3B2A;box-shadow:inset 0 0 0 1px #F4BFB2}
.frame{position:relative;background:var(--frame);border-radius:var(--r-frame);box-shadow:var(--shadow-frame);overflow:hidden}
.frame--canvas{background:#F6F8F6}
.frame--dark{background:#1E1E1E}
.frame img{width:100%}
.frame-caption{margin:var(--s-3) 2px 0;font-size:var(--fs-small);line-height:1.55;color:var(--ink-3);max-width:62ch}
.frame-caption b{color:var(--ink-2);font-weight:700}
.enlarge{display:block;width:100%;cursor:zoom-in;position:relative}
.enlarge::after{content:'';position:absolute;right:12px;bottom:12px;width:34px;height:34px;border-radius:50%;background:var(--ink) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M14 4h6v6M10 20H4v-6M20 4l-7 7M4 20l7-7'/%3E%3C/svg%3E") center/16px no-repeat;opacity:.85;transition:opacity var(--t-fast),transform var(--t-fast)}
.enlarge:hover::after{opacity:1;transform:scale(1.06)}

/* phone + browser shells (device frames hold original screens only) */
.phone{position:relative;border-radius:var(--r-phone);background:#111;padding:9px;box-shadow:0 30px 60px -30px rgba(14,42,39,.6),0 0 0 1px rgba(0,0,0,.2)}
.phone__screen{position:relative;border-radius:calc(var(--r-phone) - 9px);overflow:hidden;background:#fff;isolation:isolate}
.phone__screen img{width:100%;display:block}
.browser{border-radius:10px;background:#fff;box-shadow:var(--shadow-frame);overflow:hidden}
.browser__bar{height:30px;display:flex;align-items:center;gap:6px;padding:0 12px;background:#F2F3F2;border-bottom:1px solid #E1E5E2}
.browser__bar i{width:9px;height:9px;border-radius:50%;background:#D5DAD7}
.browser__bar span{margin-left:10px;font-family:var(--mono);font-size:11px;color:var(--ink-3)}

/* ---------- 8. Annotation: pins, notes, Tobie's note ---------- */
.pin{display:inline-grid;place-items:center;width:26px;height:26px;border-radius:50%;background:var(--teal);color:#fff;font:700 12px/1 var(--mono);box-shadow:0 0 0 3px #fff;flex:none}
.pin--beak{background:var(--beak);color:var(--ink)}
.pin-layer{position:absolute;inset:0;pointer-events:none}
.pin-layer .pin{position:absolute;transform:translate(-50%,-50%);transition:transform var(--t-state) var(--ease),box-shadow var(--t-state)}
.pin-layer .pin.is-active{transform:translate(-50%,-50%) scale(1.25);box-shadow:0 0 0 3px #fff,0 0 0 7px rgba(247,119,95,.75)}
.note{display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:start;padding:var(--s-5);background:var(--frame);border-radius:var(--r-card);box-shadow:var(--shadow-frame)}
.note__face{width:44px;height:44px;border-radius:50%;background:#fff url(/assets/work/tobie/face.webp) center/cover;box-shadow:0 0 0 2px #fff,0 0 0 4px var(--beak)}
.note__who{font-family:var(--mono);font-size:var(--fs-micro);color:var(--ink-3);margin-bottom:4px}
.note__text{font-size:1.1875rem;line-height:1.55;font-weight:500;color:var(--ink)}
:lang(zh-CN) .note__text{font-size:1.125rem;line-height:1.75}

/* ---------- 9. Home: hero ---------- */
.hero{padding:var(--s-8) 0 var(--s-7)}
.hero__grid{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);gap:var(--s-8);align-items:center}
.hero__title{font-size:var(--fs-display);line-height:1.02;letter-spacing:-.022em;margin:var(--s-5) 0 var(--s-5)}
:lang(zh-CN) .hero__title{line-height:1.22;letter-spacing:0;font-size:clamp(2.3rem,1.1rem + 3.4vw,3.6rem)}
.hero__title em{font-style:normal;color:var(--teal)}
.hero__lead{max-width:34em}
.hero__ctas{display:flex;flex-wrap:wrap;gap:var(--s-3);margin-top:var(--s-6)}
.portrait{position:relative;max-width:440px;margin-left:auto}
.portrait .frame img{aspect-ratio:1;object-fit:cover}
.method{margin-top:var(--s-8);display:grid;grid-template-columns:auto repeat(5,minmax(0,1fr));gap:0;align-items:stretch;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.method__title{padding:var(--s-4) var(--s-5) var(--s-4) 0;align-self:center}
.method__step{display:flex;gap:10px;align-items:flex-start;padding:var(--s-4) var(--s-4);border-left:1px solid var(--rule);text-align:left;font-size:var(--fs-small);line-height:1.4;color:var(--ink);transition:background var(--t-fast)}
.method__step:hover,.method__step.is-active{background:rgba(255,255,255,.7)}
.method__step b{display:block;font-weight:700}
.method__step small{display:block;color:var(--ink-3);font-size:var(--fs-micro);font-family:var(--mono);margin-top:2px}

/* ---------- 10. Home: sections ---------- */
.section{padding:var(--s-9) 0}
.section--tight{padding-top:var(--s-7)}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:var(--s-5);margin-bottom:var(--s-7)}
.section-head h2{font-size:var(--fs-h2)}
.section-head p{max-width:32em;color:var(--ink-2)}

.work{display:grid;gap:var(--s-9)}
.work-item{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:var(--gutter);align-items:center}
.work-item__visual{grid-column:1/span 8}
.work-item__copy{grid-column:9/span 4}
.work-item:nth-child(even) .work-item__visual{grid-column:5/span 8;grid-row:1}
.work-item:nth-child(even) .work-item__copy{grid-column:1/span 4;grid-row:1}
.work-item__visual>a{display:block;border-radius:var(--r-frame);transition:transform var(--t-state) var(--ease)}
.work-item__visual>a:hover{transform:translateY(-3px)}
.work-item__visual>a:hover .frame{box-shadow:var(--shadow-lift)}
.work-item__meta{margin-bottom:var(--s-4)}
.work-item h3{font-size:clamp(1.6rem,1.2rem + 1vw,2.1rem);line-height:1.12;margin-bottom:var(--s-4)}
.work-item h3 a:hover{color:var(--teal)}
.work-item__name{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.0625rem;margin-bottom:var(--s-2)}
.work-item__name::before{content:'';width:10px;height:10px;border-radius:3px;background:var(--project)}
.work-item__summary{color:var(--ink-2);margin-bottom:var(--s-4)}
.work-item__actions{display:flex;flex-wrap:wrap;gap:var(--s-3) var(--s-5);margin-top:var(--s-5)}
.work-item .chips{margin-top:var(--s-4)}

/* collages built only from original screens */
.collage{position:relative;aspect-ratio:16/10.5;overflow:hidden;border-radius:var(--r-frame);background:var(--bg,#F6F8F6)}
.collage img{position:absolute;display:block;border-radius:6px;box-shadow:0 22px 40px -22px rgba(0,0,0,.45),0 0 0 1px rgba(0,0,0,.06)}
.collage .collage__phone{border-radius:14px}

.explore-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gutter)}
.explore h3{font-size:var(--fs-h3);margin:var(--s-4) 0 var(--s-2)}
.explore p{font-size:var(--fs-small);color:var(--ink-2);margin-bottom:var(--s-3)}
.explore .frame img{aspect-ratio:3/2;object-fit:cover;transition:transform .5s var(--ease)}
.explore a:hover .frame img{transform:scale(1.03)}

.about{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:var(--s-8);align-items:start}
.about__intro h2{font-size:var(--fs-h2);margin:var(--s-3) 0 var(--s-5)}
.about__text>p{font-size:var(--fs-lead);line-height:1.65;margin-bottom:var(--s-6)}
.spec{margin:0;border-top:1px solid var(--ink)}
.spec>div{display:grid;grid-template-columns:150px minmax(0,1fr);gap:var(--s-4);padding:var(--s-4) 0;border-bottom:1px solid var(--rule)}
.spec dt{font-family:var(--mono);font-size:var(--fs-label);color:var(--ink-3);padding-top:2px}
.spec dd{margin:0;font-size:var(--fs-small);line-height:1.6}

/* contact / footer */
.contact{background:var(--ink);color:#E9F0ED;padding:var(--s-9) 0 var(--s-6);margin-top:var(--s-8);position:relative;overflow:hidden}
.contact__grid{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:var(--s-7);align-items:end}
.contact .label{color:#9FC3BC}
.contact h2{font-size:clamp(2.2rem,1.4rem + 3vw,4rem);line-height:1.05;margin:var(--s-4) 0 var(--s-6);color:#fff}
.contact__mail{display:inline-flex;align-items:center;gap:14px;font-size:clamp(1.25rem,1rem + 1vw,1.9rem);font-weight:700;color:#fff;border-bottom:2px solid var(--beak);padding-bottom:4px}
.contact__mail:hover{color:var(--beak)}
.contact__links{display:flex;flex-wrap:wrap;gap:var(--s-2) var(--s-5);margin-top:var(--s-6);font-size:var(--fs-small)}
.contact__links a{color:#CFE0DB;border-bottom:1px solid rgba(207,224,219,.35)}
.contact__links a:hover{color:#fff;border-color:#fff}
.contact__penguins{width:min(300px,40vw);filter:drop-shadow(0 20px 30px rgba(0,0,0,.35))}
.contact__penguins img{border-radius:12px}
.footer-row{display:flex;justify-content:space-between;gap:var(--s-5);flex-wrap:wrap;margin-top:var(--s-8);padding-top:var(--s-5);border-top:1px solid rgba(233,240,237,.16);font-family:var(--mono);font-size:var(--fs-micro);color:#9FB7B1}

/* ---------- 11. Case study ---------- */
.case-head{padding:var(--s-7) 0 var(--s-6)}
.back{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:var(--fs-label);color:var(--ink-2);margin-bottom:var(--s-7)}
.back:hover{color:var(--teal)}
.case-head h1{font-size:var(--fs-h1);max-width:18em;margin:var(--s-4) 0 var(--s-5)}
.case-head .lead{max-width:40em}
.case-spec{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;margin:var(--s-7) 0 0;border-top:1px solid var(--ink)}
.case-spec>div{padding:var(--s-4) var(--s-4) var(--s-4) 0;border-bottom:1px solid var(--rule)}
.case-spec>div+div{padding-left:var(--s-4);border-left:1px solid var(--rule)}
.case-spec dt{font-family:var(--mono);font-size:var(--fs-micro);color:var(--ink-3);text-transform:uppercase;letter-spacing:.05em;margin-bottom:6px}
:lang(zh-CN) .case-spec dt{text-transform:none}
.case-spec dd{margin:0;font-size:var(--fs-small);line-height:1.5}
.case-hero{margin:var(--s-6) 0 var(--s-8)}
.case-hero__actions{display:flex;flex-wrap:wrap;gap:var(--s-3);margin-top:var(--s-5)}

.case-layout{display:grid;grid-template-columns:200px minmax(0,1fr);gap:var(--s-8);align-items:start}
.toc{position:sticky;top:100px;display:grid;gap:2px;padding:var(--s-2) 0}
.toc__title{margin-bottom:var(--s-3)}
.toc a{display:grid;grid-template-columns:22px 1fr;gap:8px;padding:7px 0;font-size:var(--fs-small);line-height:1.35;color:var(--ink-3);transition:color var(--t-fast)}
.toc a span{font-family:var(--mono);font-size:var(--fs-micro);padding-top:2px}
.toc a:hover{color:var(--ink)}
.toc a.is-current{color:var(--teal);font-weight:700}
.case-body{min-width:0}
.case-section{scroll-margin-top:100px;padding-bottom:var(--s-9)}
.case-section>h2{font-size:var(--fs-h2);max-width:20em;margin:var(--s-3) 0 var(--s-5)}
.prose{max-width:40em}
.prose p{margin-bottom:var(--s-4);color:#243F3B}
.prose p:last-child{margin-bottom:0}
.case-section .note{margin:var(--s-6) 0;max-width:46em}
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gutter);margin:var(--s-6) 0;counter-reset:step}
.step{background:var(--frame);border-radius:var(--r-card);padding:var(--s-5);box-shadow:inset 0 0 0 1px var(--rule)}
.step h3{font-size:1.125rem;margin:var(--s-3) 0 var(--s-2)}
.step p{font-size:var(--fs-small);color:var(--ink-2);line-height:1.6}
.figure{margin:var(--s-6) 0}
.figure--wide{margin-right:0}
.figures{display:grid;gap:var(--gutter);margin:var(--s-6) 0}
.figures--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.figures--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.phone-strip{display:grid;grid-template-columns:repeat(var(--n,3),minmax(0,1fr));gap:var(--s-5);padding:var(--s-6);align-items:start}
.phone-strip figure{margin:0}
.phone-strip img{border-radius:12px;box-shadow:0 16px 30px -18px rgba(0,0,0,.45),0 0 0 1px rgba(0,0,0,.06)}
.phone-strip img.screen{aspect-ratio:390/844;object-fit:cover;object-position:top;width:100%}
.phone-strip figcaption{margin-top:var(--s-3);font-family:var(--mono);font-size:var(--fs-micro);color:var(--ink-2);line-height:1.45}
.phone-strip figcaption b{color:var(--teal);font-weight:700;margin-right:6px}
.outcome{background:var(--frame);border-radius:var(--r-card);padding:var(--s-6);box-shadow:inset 0 0 0 1px var(--rule);max-width:46em}
.outcome p{color:#243F3B}
.outcome p+p{margin-top:var(--s-4)}
.source-line{margin-top:var(--s-6);font-family:var(--mono);font-size:var(--fs-micro);color:var(--ink-3)}
.source-line a{color:var(--teal);text-decoration:underline;text-underline-offset:3px}
.next{display:flex;justify-content:space-between;align-items:center;gap:var(--s-5);padding:var(--s-7) 0;border-top:1px solid var(--ink);margin-top:var(--s-6)}
.next__name{font-size:var(--fs-h2);font-weight:800;line-height:1.1;margin-top:var(--s-2);display:block}
.next__arrow{width:64px;height:64px;border-radius:50%;display:grid;place-items:center;background:var(--ink);color:#fff;font-size:26px;transition:transform var(--t-state) var(--ease),background var(--t-fast)}
.next:hover .next__arrow{transform:translateX(6px);background:var(--teal)}
.next:hover .next__name{color:var(--teal)}

/* ---------- 12. Prototype player (original screens + hotspots) ---------- */
.proto{margin:var(--s-7) 0;scroll-margin-top:96px}
.proto__stage{display:grid;grid-template-columns:minmax(0,340px) minmax(0,1fr);gap:var(--s-7);padding:var(--s-7);align-items:start}
.proto__device{position:relative}
.proto__screens{position:relative}
.proto__screen{display:block;width:100%;transition:opacity var(--t-state) var(--ease)}
.proto__screen[data-hidden]{position:absolute;inset:0;opacity:0;pointer-events:none}
.hotspot{position:absolute;border-radius:10px;z-index:2;outline-offset:0;transition:box-shadow var(--t-fast),background var(--t-fast)}
.hotspot:hover{background:rgba(8,109,112,.12);box-shadow:0 0 0 2px var(--teal)}
.hotspot:focus-visible{outline:2px solid var(--teal);box-shadow:0 0 0 5px rgba(247,119,95,.6)}
.proto.is-hinting .hotspot{animation:hint 1.2s var(--ease) 2}
@keyframes hint{0%,100%{background:rgba(247,119,95,0);box-shadow:0 0 0 0 rgba(247,119,95,0)}45%{background:rgba(247,119,95,.28);box-shadow:0 0 0 3px var(--beak)}}
.proto__side{display:flex;flex-direction:column;gap:var(--s-5);min-width:0}
.proto__intro h3{font-size:var(--fs-h3);margin:var(--s-2) 0 var(--s-2)}
.proto__intro p{font-size:var(--fs-small);color:var(--ink-2)}
.rail{list-style:none;margin:0;padding:0;display:grid;gap:4px}
.rail button{width:100%;display:grid;grid-template-columns:26px 1fr;gap:12px;align-items:center;text-align:left;padding:8px 10px 8px 6px;border-radius:8px;font-size:var(--fs-small);line-height:1.35;color:var(--ink-2);transition:background var(--t-fast),color var(--t-fast)}
.rail button .pin{background:#fff;color:var(--ink-2);box-shadow:inset 0 0 0 1.5px var(--rule-strong)}
.rail button:hover{background:rgba(14,42,39,.05);color:var(--ink)}
.rail button[aria-current="step"]{background:var(--teal-wash);color:var(--ink);font-weight:700}
.rail button[aria-current="step"] .pin{background:var(--teal);color:#fff;box-shadow:none}
.rail button.is-done .pin{background:var(--ink);color:#fff;box-shadow:none}
.proto__note{min-height:7.5em}
.proto__note .note__text{font-size:1.0625rem}
.proto__next{display:flex;align-items:center;gap:10px;font-family:var(--mono);font-size:var(--fs-label);color:var(--teal-deep);background:var(--teal-wash);padding:10px 12px;border-radius:8px}
.proto__next::before{content:'';width:8px;height:8px;border-radius:50%;background:var(--teal);animation:pulse 1.8s var(--ease) infinite}
@keyframes pulse{50%{box-shadow:0 0 0 6px rgba(8,109,112,.18)}}
.proto__tools{display:flex;flex-wrap:wrap;gap:var(--s-2) var(--s-4);align-items:center;padding-top:var(--s-4);border-top:1px solid var(--rule)}
.tool-btn{display:inline-flex;align-items:center;gap:6px;font-family:var(--mono);font-size:var(--fs-label);color:var(--ink-2);padding:6px 0;border-bottom:1px solid var(--rule-strong)}
.tool-btn:hover{color:var(--teal);border-color:var(--teal)}
.proto__end{position:absolute;inset:0;z-index:3;display:grid;place-items:center;padding:24px;background:rgba(14,42,39,.84);color:#fff;text-align:center;border-radius:inherit}
.proto__end p{font-size:var(--fs-small);line-height:1.5;margin-bottom:14px}
.proto__end .btn{background:#fff;color:var(--ink)}
.proto__prov{padding:var(--s-4) var(--s-7);border-top:1px solid var(--rule);font-family:var(--mono);font-size:var(--fs-micro);line-height:1.6;color:var(--ink-3);background:#FAFBFA}

/* Studio tour: zoom into regions of the original screen */
.tour{padding:var(--s-6) var(--s-6) var(--s-5)}
.tour__viewport{position:relative;overflow:hidden;border-radius:0 0 10px 10px;aspect-ratio:16/9;background:#fff}
.tour__canvas{position:absolute;left:0;top:0;width:100%;transform-origin:0 0;transition:transform 700ms var(--ease)}
.tour__canvas img{width:100%;display:block}
.tour__mark{position:absolute;border:2px solid var(--teal);border-radius:8px;box-shadow:0 0 0 9999px rgba(14,42,39,.28);transition:all 700ms var(--ease);pointer-events:none}
.tour__mark[data-off]{opacity:0}
.tour__branch{position:absolute;border-radius:6px;pointer-events:none;transition:opacity var(--t-state)}
.tour__branch--dim{background:rgba(236,240,237,.78)}
.tour__controls{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:var(--s-6);margin-top:var(--s-5);align-items:start}
.toggle{display:inline-flex;padding:3px;border-radius:var(--r-pill);background:var(--canvas);box-shadow:inset 0 0 0 1px var(--rule)}
.toggle button{padding:7px 14px;border-radius:var(--r-pill);font-family:var(--mono);font-size:var(--fs-label);color:var(--ink-2)}
.toggle button[aria-pressed="true"]{background:var(--ink);color:#fff}
.toggle-row{display:flex;flex-wrap:wrap;align-items:center;gap:var(--s-3);margin-top:var(--s-4);font-size:var(--fs-small);color:var(--ink-2)}
.formula{font-family:var(--mono);font-size:var(--fs-label);background:var(--canvas);border-radius:6px;padding:10px 12px;color:var(--ink);margin-top:var(--s-3);line-height:1.5}

/* ---------- 13. SMT positions table: rebuilt from the original component ---------- */
.product{font-family:'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans SC',sans-serif}
.smt{background:#fff;color:#333;font-size:13px;line-height:1;letter-spacing:0}
.smt__titlebar{display:flex;align-items:center;justify-content:space-between;height:36px;padding:0 16px;border-bottom:1px solid #F2F2F3;font-weight:600;font-size:14px}
.smt__refresh{width:14px;height:14px;border:1.5px solid #666;border-radius:50%;border-top-color:transparent}
.smt__search{display:flex;align-items:center;gap:8px;width:188px;height:28px;margin:10px 16px;padding:0 10px;border:1px solid #E5E6E9;border-radius:2px;color:#999;font-size:13px}
.smt__search svg{flex:none}
.smt__scroll{overflow-x:auto;scrollbar-width:thin}
.smt table{border-collapse:collapse;width:100%;min-width:1040px;table-layout:fixed;font-variant-numeric:tabular-nums}
.smt th,.smt td{height:28px;padding:0 10px;border-right:1px solid #F2F2F3;border-bottom:1px solid #F2F2F3;white-space:nowrap;font-weight:400;text-align:right;overflow:hidden}
.smt th{background:#F2F2F3;color:#8E8E8E;font-size:13px;border-color:#F2F2F3}
.smt th:nth-child(-n+3),.smt td:nth-child(-n+3){text-align:left}
.smt td:first-child,.smt th:first-child{text-align:center}
.smt tbody tr{cursor:pointer;transition:background 80ms}
.smt tbody tr:hover,.smt tbody tr.is-hover{background:#E5E6E9}
.smt tbody tr.is-selected{background:#F1F4FF}
.smt tbody tr:focus-visible{outline:2px solid #4E71FF;outline-offset:-2px;box-shadow:none}
.smt .up{color:#DF3537}.smt .down{color:#1D9920}
.smt tr.is-empty td{color:transparent}
.smt__status{display:flex;justify-content:space-between;align-items:center;height:30px;padding:0 16px;background:#F2F2F3;color:#8E8E8E;font-size:12px}

/* ---------- 14. Live prototype (Commons Fridge) ---------- */
.live{display:grid;grid-template-columns:minmax(0,340px) minmax(0,1fr);gap:var(--s-7);padding:var(--s-7);align-items:start}
.live__phone .phone__screen{aspect-ratio:390/780;background:#F6F1E6}
.live__phone iframe{position:absolute;inset:0;width:100%;height:100%;border:0;background:#F6F1E6}
.live__poster{position:absolute;inset:0;display:grid;place-items:end center;padding:22px}
.live__poster img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:top}
.live__poster .btn{position:relative;box-shadow:0 10px 30px -10px rgba(0,0,0,.5)}
.routes{display:flex;flex-wrap:wrap;gap:8px;margin:var(--s-4) 0}
.routes button{font-family:var(--mono);font-size:var(--fs-label);padding:8px 12px;border-radius:var(--r-pill);box-shadow:inset 0 0 0 1px var(--rule-strong);background:#fff}
.routes button:hover{box-shadow:inset 0 0 0 1.5px var(--teal);color:var(--teal)}
.routes button:disabled{opacity:.45;cursor:not-allowed}

/* ---------- 15. Original recordings ---------- */
.clips__tabs{display:flex;flex-wrap:wrap;gap:6px;padding:var(--s-5) var(--s-6) 0}
.clips__tabs button{font-family:var(--mono);font-size:var(--fs-label);padding:8px 12px;border-radius:var(--r-pill);box-shadow:inset 0 0 0 1px var(--rule-strong)}
.clips__tabs button[aria-pressed="true"]{background:var(--ink);color:#fff;box-shadow:none}
.clips figure{margin:0;padding:var(--s-5) var(--s-6) var(--s-6)}
.clips video{width:100%;border-radius:8px;background:#EEF1EF}
.clips figcaption{margin-top:var(--s-3);font-size:var(--fs-small);color:var(--ink-3)}

/* ---------- 16. Lightbox ---------- */
.lightbox{border:0;padding:0;background:transparent;max-width:none;max-height:none;width:100vw;height:100vh;overflow:auto}
.lightbox::backdrop{background:rgba(14,42,39,.9)}
.lightbox__inner{min-height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:64px 24px 32px}
.lightbox img{max-width:min(1600px,100%);max-height:calc(100vh - 150px);width:auto;border-radius:6px;background:#fff}
.lightbox p{color:#DCE7E3;font-size:var(--fs-small);max-width:70ch;text-align:center}
.lightbox__close{position:fixed;top:16px;right:16px;background:#fff;color:var(--ink);border-radius:var(--r-pill);padding:10px 16px;font-family:var(--mono);font-size:var(--fs-label)}
.lightbox a{color:#fff;font-family:var(--mono);font-size:var(--fs-micro);text-decoration:underline}

/* ---------- 17. Reveal ---------- */
.js .reveal{opacity:0;transform:translateY(14px);transition:opacity var(--t-reveal) var(--ease),transform var(--t-reveal) var(--ease)}
.js .reveal.is-in{opacity:1;transform:none}
.js .portrait .pin{opacity:0;transform:translate(-50%,-50%) scale(.4)}
.js .portrait.is-in .pin{opacity:1;transform:translate(-50%,-50%) scale(1);transition:opacity .4s var(--ease),transform .5s var(--ease)}
.js .portrait.is-in .pin:nth-child(2){transition-delay:.12s}.js .portrait.is-in .pin:nth-child(3){transition-delay:.24s}.js .portrait.is-in .pin:nth-child(4){transition-delay:.36s}.js .portrait.is-in .pin:nth-child(5){transition-delay:.48s}
.js .portrait.is-in .pin.is-active{transform:translate(-50%,-50%) scale(1.25);transition-delay:0s}

/* ---------- 18. Structure mode (reveals the page's own system) ---------- */
.structure-toggle{font-family:var(--mono);font-size:var(--fs-micro);color:var(--ink-3);display:inline-flex;align-items:center;gap:8px}
.structure-toggle i{width:26px;height:15px;border-radius:9px;background:var(--rule);position:relative;transition:background var(--t-fast)}
.structure-toggle i::after{content:'';position:absolute;left:2px;top:2px;width:11px;height:11px;border-radius:50%;background:#fff;transition:transform var(--t-fast) var(--ease)}
.structure-toggle[aria-pressed="true"] i{background:var(--structure)}
.structure-toggle[aria-pressed="true"] i::after{transform:translateX(11px)}
.show-structure [data-component]{outline:1px dashed var(--structure);outline-offset:4px;position:relative}
.show-structure [data-component]::before{content:attr(data-component);position:absolute;left:-1px;top:-24px;z-index:30;font:500 10.5px/1 var(--mono);color:#fff;background:var(--structure);padding:4px 6px;border-radius:3px;white-space:nowrap;pointer-events:none}

/* ---------- 19. Responsive ---------- */
@media (max-width:1100px){
  .hero__grid{gap:var(--s-7)}
  .method{grid-template-columns:repeat(5,minmax(0,1fr))}
  .method__title{grid-column:1/-1;padding:var(--s-4) 0 var(--s-2);border-bottom:0}
  .method__step:first-of-type{border-left:0}
  .case-layout{grid-template-columns:160px minmax(0,1fr);gap:var(--s-6)}
  .proto__stage,.live{grid-template-columns:minmax(0,300px) minmax(0,1fr);gap:var(--s-6);padding:var(--s-6)}
  .about{gap:var(--s-7)}
}
@media (max-width:860px){
  .nav a:not(.nav__lang){display:none}
  .nav.is-open{position:absolute;left:0;right:0;top:68px;display:grid;padding:var(--s-4) var(--margin) var(--s-5);background:var(--canvas);border-bottom:1px solid var(--rule)}
  .nav.is-open a{display:block;padding:12px 0;border-radius:0;border-bottom:1px solid var(--rule)}
  .nav.is-open .nav__lang{justify-self:start;margin:var(--s-3) 0 0;padding:8px 14px;border-radius:var(--r-pill);border:0}
  .menu-btn{display:inline-flex;align-items:center}
  .section-head{flex-direction:column;align-items:flex-start;gap:var(--s-3);margin-bottom:var(--s-6)}
  .hero__grid{grid-template-columns:minmax(0,1fr)}
  .portrait{margin:0 auto;max-width:380px;width:100%}
  .method{grid-template-columns:repeat(2,minmax(0,1fr))}
  .method__step{border-left:0;border-top:1px solid var(--rule)}
  .method__step:nth-of-type(even){border-left:1px solid var(--rule)}
  .work-item{grid-template-columns:minmax(0,1fr)}
  .work-item__visual,.work-item__copy,.work-item:nth-child(even) .work-item__visual,.work-item:nth-child(even) .work-item__copy{grid-column:1;grid-row:auto}
  .explore-grid{grid-template-columns:minmax(0,1fr)}
  .about{grid-template-columns:minmax(0,1fr)}
  .contact__grid{grid-template-columns:minmax(0,1fr)}
  .contact__penguins{width:220px}
  .case-spec{grid-template-columns:repeat(2,minmax(0,1fr))}
  .case-spec>div:nth-child(3){padding-left:0;border-left:0}
  .case-layout{display:block}
  .toc{position:static;display:flex;gap:6px;overflow-x:auto;margin-bottom:var(--s-6);padding-bottom:var(--s-3);scrollbar-width:none}
  .toc__title{display:none}
  .toc a{flex:none;display:block;padding:8px 12px;border-radius:var(--r-pill);background:var(--frame);box-shadow:inset 0 0 0 1px var(--rule);white-space:nowrap}
  .toc a span{display:none}
  .steps,.figures--3,.figures--2{grid-template-columns:minmax(0,1fr)}
  .proto__stage,.live{grid-template-columns:minmax(0,1fr);padding:var(--s-5)}
  .proto__device,.live__phone{max-width:320px;margin:0 auto;width:100%}
  .proto__prov{padding:var(--s-4) var(--s-5)}
  .tour{padding:var(--s-4)}
  .tour__controls{grid-template-columns:minmax(0,1fr)}
  .phone-strip{grid-template-columns:repeat(var(--n,3),minmax(160px,1fr));overflow-x:auto;padding:var(--s-5);scroll-snap-type:x mandatory}
  .phone-strip figure{scroll-snap-align:start}
}
@media (max-width:520px){
  .brand__sub{display:none}
  .hero{padding-top:var(--s-6)}
  .hero__ctas .btn{flex:1 1 auto}
  .method{grid-template-columns:minmax(0,1fr)}
  .method__step:nth-of-type(even){border-left:0}
  .case-spec{grid-template-columns:minmax(0,1fr)}
  .case-spec>div+div{padding-left:0;border-left:0}
  .spec>div{grid-template-columns:minmax(0,1fr);gap:4px}
  .next__arrow{width:48px;height:48px}
}

/* ---------- 20. Preferences ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  .js .reveal{opacity:1;transform:none}
}
@media print{.topbar,.toc,.proto__tools,.contact__penguins{display:none}.contact{background:#fff;color:#000}}