/* 3KM brand site — shared styles (v2 · light theme) */

:root{
  --bg:#ffffff;
  --bg-soft:#f7f8fa;
  --bg-elev:#f1f3f6;
  --line:#e6e9ec;
  --line-strong:#d3d8de;
  --fg:#0d1117;
  --muted:#5b6675;
  --muted-2:#66717f;
  --accent:#15803d;
  --accent-hover:#116a33;
  --accent-soft:rgba(21,128,61,.07);
  --shadow-card:0 1px 2px rgba(13,17,23,.04), 0 10px 28px rgba(13,17,23,.05);
  --radius:8px;
  --max:1160px;
  --gutter:clamp(20px,4vw,40px);
  --space-section:clamp(96px,13vw,168px);
  --space-block:clamp(40px,6vw,68px);
  --ease:cubic-bezier(.16,1,.3,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;scroll-padding-top:90px}
body{
  background:var(--bg);color:var(--fg);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  line-height:1.85;font-size:16px;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img,svg{max-width:100%;display:block}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}
.skip-link{position:fixed;left:16px;top:12px;z-index:100;transform:translateY(-160%);background:var(--fg);color:#fff;padding:10px 14px;border-radius:6px}
.skip-link:focus{transform:none}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #0f6f35;outline-offset:3px}

h1,h2,h3{line-height:1.35;letter-spacing:0;font-weight:700;color:var(--fg)}
h1{font-size:54px}
h2{font-size:37px;margin-bottom:22px}
h3{font-size:21px;margin-bottom:12px;line-height:1.5}
p{color:var(--muted)}
strong{color:var(--fg);font-weight:600}
code{font-family:"SFMono-Regular",Consolas,"Liberation Mono",monospace;font-size:.88em;overflow-wrap:anywhere}

.eyebrow{
  display:inline-block;font-size:12.5px;letter-spacing:0;color:var(--accent);
  text-transform:uppercase;margin-bottom:20px;font-weight:700;
}
.accent{color:var(--accent)}
.lede{font-size:18px;max-width:66ch;line-height:1.9}
.section{padding:var(--space-section) 0;border-top:1px solid var(--line)}
.stack{margin-top:var(--space-block)}
.stack-sm{margin-top:36px}
.muted-small{font-size:13.5px;color:var(--muted-2)}

/* ---------- NAV ---------- */
.nav{
  position:sticky;top:0;z-index:60;background:rgba(255,255,255,.92);
  backdrop-filter:blur(16px);border-bottom:1px solid var(--line);
}
.nav__bar{display:flex;align-items:center;gap:30px;height:74px}
.logo{display:flex;align-items:center;gap:11px;font-weight:700;letter-spacing:0;font-size:17px}
.logo svg{width:27px;height:27px;color:var(--accent);transition:transform .5s var(--ease)}
.logo:hover svg{transform:rotate(90deg)}
.logo__sub{font-size:11.5px;color:var(--muted-2);font-weight:500;letter-spacing:0}
.nav__links{display:flex;gap:26px;margin-left:auto;font-size:14.5px}
.nav__links a{color:var(--muted);position:relative;padding:6px 0;transition:color .2s}
.nav__links a::after{
  content:"";position:absolute;left:0;right:100%;bottom:0;height:1.5px;
  background:var(--accent);transition:right .32s var(--ease);
}
.nav__links a:hover{color:var(--fg)}
.nav__links a:hover::after{right:0}
.nav__links a[aria-current="page"]{color:var(--fg);font-weight:650}
.nav__links a[aria-current="page"]::after{right:0}
.nav__toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line-strong);border-radius:6px;
  background:#fff;align-items:center;justify-content:center;flex-direction:column;gap:4px;cursor:pointer;
}
.nav__toggle span{display:block;width:17px;height:1.5px;background:var(--fg);transition:transform .2s,opacity .2s}
.nav.is-open .nav__toggle span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.nav.is-open .nav__toggle span:nth-child(2){opacity:0}
.nav.is-open .nav__toggle span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}
.nav__lang{font-size:13.5px;color:var(--muted-2);border:1px solid var(--line);border-radius:999px;padding:6px 13px}
.nav__lang:hover{color:var(--accent);border-color:var(--accent)}

.btn{
  display:inline-flex;align-items:center;gap:8px;border-radius:999px;
  padding:13px 26px;font-size:15px;font-weight:650;border:1px solid var(--line-strong);
  transition:transform .22s var(--ease),background .22s,border-color .22s,box-shadow .22s;
  white-space:nowrap;
}
.btn--primary{background:var(--accent);color:#ffffff;border-color:var(--accent)}
.btn--primary:hover{transform:translateY(-2px);background:var(--accent-hover);box-shadow:0 12px 30px rgba(21,128,61,.22)}
.btn--ghost{color:var(--fg);background:#fff}
.btn--ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.nav .btn{padding:10px 20px;font-size:14px}

/* ---------- HERO ---------- */
.hero{
  position:relative;overflow:hidden;display:flex;align-items:center;
  min-height:min(680px,calc(100svh - 112px));padding:clamp(72px,9vw,112px) 0 64px;
  background:#0b0d0c url("brand-hero-desktop.webp") center 58%/cover no-repeat;color:#fff;
}
.hero::before{
  content:"";position:absolute;inset:0;background:rgba(4,7,5,.63);
}
.hero__inner{position:relative;z-index:1;width:100%;min-width:0}
.hero h1{max-width:21ch;margin-bottom:30px}
.hero .lede{margin-bottom:40px;max-width:62ch}
.hero__actions{display:flex;gap:16px;flex-wrap:wrap;align-items:center}
.hero__note{margin-top:22px;font-size:14px;color:var(--muted-2)}
.hero__pills{display:flex;gap:12px;flex-wrap:wrap;margin-top:52px}
.hero h1,.hero strong{color:#fff}
.hero .eyebrow{color:#b8e4c5}
.hero .lede{color:rgba(255,255,255,.88)}
.hero .hero__note{color:rgba(255,255,255,.7)}
.hero .btn--ghost{color:#fff;background:rgba(8,12,9,.38);border-color:rgba(255,255,255,.52);backdrop-filter:blur(10px)}
.hero .btn--ghost:hover{background:#fff;color:var(--fg);border-color:#fff}
.hero .pill{color:rgba(255,255,255,.86);border-color:rgba(255,255,255,.25);background:rgba(8,12,9,.38);backdrop-filter:blur(8px)}
.hero .pill:hover{color:#fff;border-color:rgba(255,255,255,.7)}
#choose{padding-top:36px}
.js #choose > .wrap > .reveal:first-child{opacity:1;transform:none}
.pill{
  font-size:13.5px;color:var(--muted);border:1px solid var(--line);
  padding:8px 16px;border-radius:999px;background:var(--bg-soft);
  transition:border-color .25s,color .25s,transform .25s var(--ease);
}
.pill:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}

.hero--image{
  display:flex;align-items:flex-end;min-height:clamp(570px,calc(100svh - 110px),720px);
  padding:clamp(88px,12vw,156px) 0 clamp(62px,8vw,92px);background:#0b0e0c;color:#fff;
}
.hero__media,.hero__scrim{position:absolute;inset:0}
.hero__media img{width:100%;height:100%;object-fit:cover}
.hero__scrim{background:linear-gradient(90deg,rgba(7,10,8,.9) 0%,rgba(7,10,8,.7) 44%,rgba(7,10,8,.18) 78%,rgba(7,10,8,.35) 100%)}
.hero--image .hero__inner{z-index:1;width:100%}
.hero--image h1{max-width:14ch;color:#fff}
.hero--image .lede{color:rgba(255,255,255,.82);max-width:56ch}
.hero--image .eyebrow{color:#9ee6b6}
.hero--image strong{color:#fff}
.hero--image .hero__note{color:rgba(255,255,255,.62);max-width:66ch}
.hero--image .btn--ghost{background:rgba(8,12,9,.3);color:#fff;border-color:rgba(255,255,255,.48);backdrop-filter:blur(10px)}
.hero--image .btn--ghost:hover{background:#fff;color:var(--fg);border-color:#fff}

.evidence-strip{border-bottom:1px solid var(--line);background:#fff}
.evidence-strip__grid{display:grid;grid-template-columns:repeat(3,1fr)}
.evidence-strip__grid div{padding:24px clamp(18px,3vw,36px);border-right:1px solid var(--line)}
.evidence-strip__grid div:first-child{padding-left:0}
.evidence-strip__grid div:last-child{border-right:0;padding-right:0}
.evidence-strip strong,.evidence-strip span{display:block}
.evidence-strip strong{font-size:15px}
.evidence-strip span{font-size:13px;color:var(--muted);margin-top:3px;line-height:1.55}
.section-heading{max-width:790px}
.section--soft{background:var(--bg-soft)}
.product-card{display:flex;flex-direction:column;min-height:310px}
.product-card .card__link{margin-top:auto;padding-top:26px}
.product-card .card__link::after,.text-link::after{content:"  →"}

.split-layout{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(320px,.92fr);gap:clamp(38px,6vw,82px);align-items:center}
.split-layout__media{overflow:hidden;border-radius:8px;aspect-ratio:16/10;background:#111}
.split-layout__media img{width:100%;height:100%;object-fit:cover}
.numbered-flow{list-style:none;display:grid;gap:0;margin-top:32px;border-top:1px solid var(--line)}
.numbered-flow li{display:grid;gap:3px;padding:18px 0;border-bottom:1px solid var(--line)}
.numbered-flow strong{font-size:15.5px}
.numbered-flow span{font-size:14px;color:var(--muted)}
.text-link{display:inline-block;margin-top:24px;color:var(--accent);font-weight:650;font-size:14.5px}

.publish-path{border-top:1px solid var(--line)}
.publish-path__item{display:grid;grid-template-columns:64px 1fr;gap:24px;padding:28px 0;border-bottom:1px solid var(--line)}
.publish-path__item > span{font-size:12px;color:var(--accent);font-weight:700;padding-top:5px}
.publish-path__item h3{margin-bottom:5px}
.publish-path__item p{max-width:78ch}
.notice{display:grid;grid-template-columns:150px 1fr;gap:28px;margin-top:34px;padding:24px 26px;border-left:3px solid var(--accent);background:var(--accent-soft);border-radius:0 6px 6px 0}
.notice p{font-size:14.5px}

.product-hero{padding:clamp(70px,9vw,118px) 0;border-bottom:1px solid var(--line);background:var(--bg-soft)}
.product-hero__grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(380px,.88fr);gap:clamp(40px,6vw,84px);align-items:center}
.product-hero h1{font-size:clamp(39px,4.6vw,58px);max-width:13ch;margin-bottom:28px}
.product-hero .lede{max-width:58ch}
.product-hero .hero__actions{margin-top:34px}
.product-hero__media{aspect-ratio:4/3;overflow:hidden;border-radius:8px;background:#111;box-shadow:var(--shadow-card)}
.product-hero__media img{width:100%;height:100%;object-fit:cover}
.product-hero__media--portal img{object-position:center}
.product-hero--plain{background:#fff}

.process-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.process-grid--3{grid-template-columns:repeat(3,1fr)}
.process-step{padding:30px 26px;border-right:1px solid var(--line);min-height:220px}
.process-step:last-child{border-right:0}
.process-step > span{font-size:12px;color:var(--accent);font-weight:700}
.process-step h3{margin-top:30px}
.process-step p{font-size:14.5px}
.split-copy{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:clamp(44px,7vw,96px);align-items:start}
.principle-list{border-top:1px solid var(--line)}
.principle-list > div{display:grid;grid-template-columns:120px 1fr;gap:22px;padding:20px 0;border-bottom:1px solid var(--line)}
.principle-list p{font-size:14.5px}

.evidence-board{border:1px solid var(--line-strong);border-radius:8px;background:var(--bg-soft);padding:28px;box-shadow:var(--shadow-card)}
.evidence-board__head{display:flex;justify-content:space-between;gap:16px;align-items:center;padding-bottom:18px;border-bottom:1px solid var(--line)}
.evidence-board__head span{font-size:12px;color:var(--accent);font-weight:700}
.evidence-board__head strong{font-size:14px}
.evidence-board__row{display:grid;grid-template-columns:100px 1fr;gap:16px;padding:18px 0;border-bottom:1px solid var(--line)}
.evidence-board__row span{font-size:13px;color:var(--muted)}
.evidence-board__row b{font-size:14px;color:var(--fg);font-weight:600}
.evidence-board > p{font-size:12px;margin-top:18px}

.domain-map{display:grid;grid-template-columns:1fr 56px 1fr;align-items:stretch}
.domain-map__node{border:1px solid var(--line);background:#fff;border-radius:8px;padding:30px}
.domain-map__node span{display:block;font-size:12px;color:var(--accent);font-weight:700;margin-bottom:12px}
.domain-map__node strong{display:block;font-family:"SFMono-Regular",Consolas,monospace;font-size:clamp(15px,2vw,19px);overflow-wrap:anywhere}
.domain-map__node p{font-size:14px;margin-top:14px}
.domain-map__arrow{display:grid;place-items:center;color:var(--accent);font-size:22px}
.status-note{margin-top:28px;font-size:13px;color:var(--muted-2)}

/* ---------- GRIDS / CARDS ---------- */
.grid{display:grid;gap:24px}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--2{grid-template-columns:repeat(2,1fr)}
.card{
  display:block;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:clamp(28px,3vw,40px) clamp(24px,2.6vw,34px);
  transition:border-color .3s,transform .3s var(--ease),box-shadow .3s,background .3s;
}
.card:hover{border-color:var(--line-strong);transform:translateY(-5px);box-shadow:var(--shadow-card);background:var(--bg-soft)}
.card h3{margin-bottom:14px}
.card p{font-size:15px;line-height:1.85}
.card__link{display:inline-block;margin-top:20px;font-size:14.5px;color:var(--accent);font-weight:650}
.card:hover .card__link{text-decoration:underline;text-underline-offset:4px}
.card__note{display:block;margin-top:18px}
.num{font-size:11.5px;color:var(--accent);font-weight:700;letter-spacing:0;margin-bottom:16px;display:block;opacity:.9}

/* ---------- DEFINITION BLOCK (AI/爬虫可引用) ---------- */
.definition{
  padding:clamp(28px,3.4vw,46px);
  border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(21,128,61,.045),rgba(255,255,255,0) 72%);
}
.definition h2{font-size:27px;margin-bottom:16px}
.definition dl{display:grid;gap:20px;margin-top:26px}
.definition dt{font-weight:650;color:var(--fg);font-size:15px;margin-bottom:5px}
.definition dd{color:var(--muted);font-size:15px;line-height:1.9}
.definition dd b{color:var(--fg);font-weight:600}

/* ---------- PROBLEM ---------- */
.problem{margin-top:var(--space-block);border-top:1px solid var(--line)}
.problem__item{
  display:grid;grid-template-columns:minmax(180px,232px) 1fr;gap:clamp(24px,4vw,56px);
  padding:clamp(34px,4.4vw,52px) 0;border-bottom:1px solid var(--line);
}
.problem__item h3{margin:0;color:var(--fg)}
.problem__item p{font-size:15.5px;line-height:1.9}
.punch{
  margin-top:var(--space-block);padding:clamp(26px,3vw,36px) clamp(26px,3vw,38px);
  border-left:3px solid var(--accent);background:var(--accent-soft);
  border-radius:0 var(--radius) var(--radius) 0;
  font-size:19px;color:var(--fg);font-weight:600;line-height:1.8;
}

#network{
  position:relative;overflow:hidden;background:#0b0d0c url("brand-member-journey.webp") center/cover no-repeat;color:#fff;
}
#network::before{content:"";position:absolute;inset:0;background:rgba(4,7,5,.7)}
#network > .wrap{position:relative;z-index:1}
#network h2,#network h3{color:#fff}
#network .lede,#network .card p{color:rgba(255,255,255,.78)}
#network .eyebrow,#network .num{color:#b8e4c5}
#network .card{background:rgba(8,12,9,.66);border-color:rgba(255,255,255,.2);backdrop-filter:blur(10px)}
#network .card:hover{background:rgba(8,12,9,.78);border-color:rgba(255,255,255,.42)}

/* ---------- STATS STRIP ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stat{
  border:1px solid var(--line);border-radius:12px;background:#fff;
  padding:clamp(22px,2.6vw,30px) clamp(20px,2.4vw,26px);
  transition:border-color .3s,transform .3s var(--ease),box-shadow .3s,background .3s;
}
.stat:hover{border-color:var(--accent);transform:translateY(-4px);box-shadow:var(--shadow-card);background:var(--bg-soft)}
.stat__num{
  font-size:34px;font-weight:700;color:var(--accent);
  line-height:1.15;letter-spacing:0;
}
.stat__label{font-size:13.5px;color:var(--fg);margin-top:12px;line-height:1.6;font-weight:500}
.stat__src{font-size:12px;color:var(--muted-2);margin-top:8px}

/* ---------- POLICY ---------- */
.policy{display:grid;gap:14px;margin-top:var(--space-block)}
.policy__row{
  display:grid;grid-template-columns:1fr auto;gap:20px;align-items:baseline;
  padding:22px 26px;border:1px solid var(--line);border-radius:12px;background:#fff;
  transition:border-color .28s,background .28s,transform .28s var(--ease),box-shadow .28s;
}
.policy__row:hover{border-color:var(--accent);background:var(--bg-soft);transform:translateX(3px);box-shadow:var(--shadow-card)}
.policy__row strong{color:var(--fg);font-weight:600;font-size:15.5px;line-height:1.7}
.policy__row strong a{color:var(--fg);border-bottom:1px solid transparent;transition:color .22s,border-color .22s}
.policy__row strong a:hover{color:var(--accent);border-bottom-color:var(--accent)}
.policy__row span{font-size:13px;color:var(--muted-2);white-space:nowrap}

/* ---------- PORTAL GRID ---------- */
.portal{
  display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,4vw,56px);
  align-items:center;
}
.portal__points{display:grid;gap:16px;margin-top:26px}
.portal__point{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--muted)}
.portal__point::before{content:"";flex:0 0 6px;height:6px;border-radius:50%;background:var(--accent);margin-top:11px}
.portal__card{
  border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-soft);
  padding:clamp(22px,2.6vw,30px);font-size:13.5px;line-height:1.8;
  box-shadow:var(--shadow-card);
}
.portal__bar{display:flex;gap:7px;margin-bottom:18px}
.portal__dot{width:9px;height:9px;border-radius:50%;background:var(--line-strong)}
.portal__line{color:var(--muted-2);margin-bottom:9px}
.portal__line b{color:var(--accent);font-weight:600}
.portal__line--head{color:var(--fg);font-size:14.5px;font-weight:650;margin-bottom:14px}

/* ---------- COMPARISON TABLE ---------- */
.compare-wrap{
  margin-top:var(--space-block);border:1px solid var(--line);
  border-radius:var(--radius);overflow-x:auto;background:#fff;
  box-shadow:var(--shadow-card);
}
.compare{width:100%;border-collapse:collapse;font-size:14.5px;min-width:640px}
.compare th,.compare td{text-align:left;padding:18px 20px;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.7}
.compare thead th{color:var(--fg);font-weight:650;font-size:14px;border-bottom:1px solid var(--line-strong);white-space:nowrap;background:var(--bg-soft)}
.compare tbody th{color:var(--muted);font-weight:500;width:20%;white-space:nowrap}
.compare tbody tr:last-child th,.compare tbody tr:last-child td{border-bottom:none}
.compare td{color:var(--muted)}
.compare td.is-3km{color:var(--fg);font-weight:550;background:rgba(21,128,61,.045)}
.compare thead th.is-3km{color:var(--accent);background:rgba(21,128,61,.07)}
@media(max-width:820px){
  h1{font-size:40px}
  h2{font-size:30px}
  h3{font-size:20px}
  .lede{font-size:17px}
  .definition h2{font-size:24px}
  .punch{font-size:17px}
  .stat__num{font-size:29px}
  .final h2{font-size:34px}
  .hero{min-height:min(640px,calc(100svh - 96px));padding:64px 0 48px}
  .compare{font-size:13.5px;min-width:560px}
  .compare th,.compare td{padding:14px 14px}
}

@media(max-width:680px){
  .hero{background-image:url("brand-hero-mobile.webp");background-position:center 55%}
  #network{background-image:url("brand-member-journey-720.webp")}
}

/* ---------- FAQ ---------- */
.faq{margin-top:var(--space-block);border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line);transition:background .25s}
.faq details:hover{background:var(--bg-soft)}
.faq summary{
  cursor:pointer;padding:26px 0;font-weight:600;font-size:16.5px;color:var(--fg);
  list-style:none;display:flex;justify-content:space-between;gap:20px;align-items:center;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-size:21px;font-weight:400;line-height:1;transition:transform .3s var(--ease)}
.faq details[open] summary::after{content:"–"}
.faq p{padding:0 0 28px;font-size:15px;max-width:72ch;line-height:1.95}

/* ---------- FINAL ---------- */
.final{text-align:center;padding:clamp(96px,13vw,168px) 0;background:var(--bg-soft)}
.final h2{font-size:43px;max-width:26ch;margin:0 auto 26px;line-height:1.4}
.final .lede{margin:0 auto 38px}

/* ---------- PUBLIC P0 PAGES ---------- */
.subpage-hero{padding:clamp(64px,9vw,112px) 0;border-bottom:1px solid var(--line);background:var(--bg-soft)}
.subpage-hero h1{max-width:16ch;margin-bottom:24px}
.subpage-hero .lede{max-width:58ch}
.subpage-hero .hero__actions{margin-top:32px}
.trust-note{margin-top:22px;font-size:14px;max-width:62ch}
.trust-note a,.legal-page a,.support-link{color:var(--accent);text-decoration:underline;text-underline-offset:3px}
.page-content{padding:clamp(64px,9vw,112px) 0}
.join-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(280px,.65fr);gap:clamp(28px,5vw,64px);align-items:start}
.content-block + .content-block{margin-top:56px}
.content-block h2{margin-bottom:16px}
.steps-list{display:grid;gap:0;margin-top:30px;border-top:1px solid var(--line)}
.step-row{display:grid;grid-template-columns:64px 1fr;gap:20px;padding:24px 0;border-bottom:1px solid var(--line)}
.step-row strong{font-size:13px;color:var(--accent);letter-spacing:0}
.step-row h3{margin-bottom:6px}
.check-list{display:grid;gap:12px;margin-top:24px;list-style:none}
.check-list li{position:relative;padding-left:24px;color:var(--muted)}
.check-list li::before{content:"";position:absolute;left:0;top:.8em;width:8px;height:8px;border-radius:50%;background:var(--accent)}
.action-panel{position:sticky;top:98px;border:1px solid var(--line-strong);border-radius:8px;background:#fff;padding:28px;box-shadow:var(--shadow-card)}
.action-panel h2{font-size:1.3rem;margin-bottom:12px}
.action-panel .btn{width:100%;justify-content:center;margin-top:18px}
.action-panel .btn + .btn{margin-top:12px}
.action-panel__meta{margin-top:22px;padding-top:20px;border-top:1px solid var(--line);font-size:13px}
.legal-page{max-width:860px;margin:0 auto;padding:clamp(56px,8vw,96px) var(--gutter)}
.legal-page h1{margin:14px 0 22px}
.legal-page__intro{font-size:18px;line-height:1.9}
.legal-meta{display:grid;gap:10px;margin:28px 0 48px;padding:22px;border-left:3px solid var(--accent);background:var(--accent-soft)}
.legal-meta p{font-size:14px}
.legal-page article{padding:32px 0;border-top:1px solid var(--line)}
.legal-page article h2{font-size:23px;margin-bottom:16px}
.legal-page article p + p{margin-top:12px}
.legal-page article p{line-height:1.9}
.legal-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:34px}

/* ---------- FOOTER ---------- */
.footer{border-top:1px solid var(--line);padding:clamp(64px,8vw,96px) 0 48px;font-size:14px;background:#fff}
.footer__top{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:clamp(28px,4vw,56px);margin-bottom:56px}
.footer__tag{color:var(--fg);font-weight:600;margin-bottom:18px;font-size:15px}
.footer__links{display:grid;gap:12px}
.footer__links a{color:var(--muted);transition:color .2s,transform .2s var(--ease)}
.footer__links a:hover{color:var(--accent);transform:translateX(3px)}
.footer__bottom{border-top:1px solid var(--line);padding-top:26px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--muted-2);font-size:13px}

/* ---------- MOTION ---------- */
.js .reveal{opacity:0;transform:translateY(22px);transition:opacity .85s var(--ease),transform .85s var(--ease)}
.js .reveal.is-visible{opacity:1;transform:none}

/* ---------- RESPONSIVE ---------- */
@media(max-width:980px){
  .grid--3,.grid--2{grid-template-columns:1fr}
  .problem__item{grid-template-columns:1fr;gap:14px}
  .nav__bar{position:relative;gap:12px}
  .js .nav__toggle{display:flex;margin-left:auto}
  .nav__links{
    display:flex;position:absolute;top:calc(100% - 1px);left:var(--gutter);right:var(--gutter);
    flex-direction:column;gap:0;margin-left:0;padding:10px;background:#fff;border:1px solid var(--line);
    border-radius:8px;box-shadow:var(--shadow-card);
  }
  .js .nav__links{display:none}
  .js .nav.is-open .nav__links{display:flex}
  html:not(.js) .nav__bar{height:auto;min-height:74px;flex-wrap:wrap;padding-top:12px;padding-bottom:12px}
  html:not(.js) .nav__links{position:static;order:4;width:100%}
  .nav__links a{padding:11px 12px;border-radius:5px}
  .nav__links a:hover,.nav__links a[aria-current="page"]{background:var(--bg-soft)}
  .nav__links a::after{display:none}
  .footer__top{grid-template-columns:1fr}
  .policy__row{grid-template-columns:1fr;gap:8px}
  .hero__pills{margin-top:38px}
  .portal{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .join-grid{grid-template-columns:1fr}
  .action-panel{position:static}
  .split-layout,.product-hero__grid,.split-copy{grid-template-columns:1fr}
  .product-hero__media{max-width:760px}
  .process-grid{grid-template-columns:repeat(2,1fr)}
  .process-step:nth-child(2){border-right:0}
  .process-step:nth-child(-n+2){border-bottom:1px solid var(--line)}
}
@media(max-width:520px){
  h1{font-size:31px}
  h2{font-size:24px}
  h3{font-size:18px}
  .lede{font-size:16px}
  .definition h2{font-size:20px}
  .punch{font-size:16px}
  .stat__num{font-size:24px}
  .final h2{font-size:27px}
  .hero{min-height:560px;padding:28px 0 20px}
  .hero .eyebrow{margin-bottom:8px}
  .hero h1{margin-bottom:14px}
  .hero .lede{margin-bottom:18px;line-height:1.72}
  .hero__actions{gap:10px}
  .hero__actions .btn{flex:0 1 auto;padding:11px 16px;font-size:14px}
  .hero .hero__note{margin-top:10px}
  .hero__pills{flex-wrap:nowrap;margin-top:16px;overflow-x:auto;padding-bottom:4px;scrollbar-width:none}
  .hero__pills::-webkit-scrollbar{display:none}
  .hero .pill{flex:0 0 auto}
  #choose{padding-top:24px}
  .hero__actions .btn{justify-content:center}
  .stats{grid-template-columns:1fr}
  .logo__sub{display:none}
  .nav__bar{gap:14px}
  .nav .btn{margin-left:0;padding:9px 13px}
  .step-row{grid-template-columns:46px 1fr;gap:12px}
  .legal-actions .btn{width:100%;justify-content:center}
}

@media(max-width:820px){
  .hero--image{min-height:600px;padding:72px 0 52px}
  .hero--image h1{font-size:40px}
  .evidence-strip__grid{grid-template-columns:1fr}
  .evidence-strip__grid div,.evidence-strip__grid div:first-child,.evidence-strip__grid div:last-child{padding:16px 0;border-right:0;border-bottom:1px solid var(--line)}
  .evidence-strip__grid div:last-child{border-bottom:0}
  .product-hero{padding:64px 0}
  .product-hero h1{font-size:40px}
  .publish-path__item{grid-template-columns:44px 1fr;gap:14px}
  .notice{grid-template-columns:1fr;gap:6px}
  .domain-map{grid-template-columns:1fr}
  .domain-map__arrow{height:48px;transform:rotate(90deg)}
  .principle-list > div{grid-template-columns:1fr;gap:5px}
}

@media(max-width:520px){
  .hero--image{min-height:0;padding:28px 0 18px}
  .hero--image h1,.product-hero h1{font-size:31px}
  .hero--image .lede{margin-bottom:24px}
  .hero--image .hero__note{margin-top:12px;font-size:12.5px;line-height:1.65}
  .hero__scrim{background:linear-gradient(180deg,rgba(7,10,8,.58) 0%,rgba(7,10,8,.88) 72%,rgba(7,10,8,.94) 100%)}
  .hero--image .hero__actions,.product-hero .hero__actions{display:grid;grid-template-columns:1fr}
  .hero--image .hero__actions .btn,.product-hero .hero__actions .btn{width:100%;justify-content:center}
  .product-card{min-height:0}
  .product-hero__media{aspect-ratio:4/3}
  .process-grid,.process-grid--3{grid-template-columns:1fr}
  .process-step,.process-step:nth-child(2){border-right:0;border-bottom:1px solid var(--line);min-height:0;padding:24px 0}
  .process-step:last-child{border-bottom:0}
  .process-step h3{margin-top:16px}
  .evidence-board{padding:20px}
  .evidence-board__row{grid-template-columns:1fr;gap:4px}
  .publish-path__item{grid-template-columns:1fr;gap:4px}
  .notice{padding:20px}
}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .js .reveal{opacity:1!important;transform:none!important}
}