/* ============================================================
   One1 marketing site — shared design system
   (tokens & atoms from One1 设计规范 / 标注稿; matches web/index.html landing)
   Used by: pricing.html, solutions.html, docs.html, login.html,
            register.html, forgot.html
   ============================================================ */
:root{
  --purple:#5A3DF0; --purple-head:#5338CA; --purple-dot:#795AF2;
  --purple-surface:#F1EBFF; --cta-bg:#F4F2FE; --purple-track:#D8D3F5;
  --ink:#101014; --nav:#3A3A3E; --text:#6B7280; --muted:#9CA3AF; --faint:#B0AEA9; --faint-2:#B7B4AE;
  --line-strong:#374151;
  --cream:#FAF9F7; --alt:#FAFAF9; --white:#FFFFFF;
  --border:#ECEAE6; --border-2:#F3F1EE; --border-3:#F0EEEB; --chip:#F5F3F0;
  --dark:#111114;
  --risk:#FD3F56; --risk-bg:#FEECEE; --warn:#D97706; --warn-bg:#FEF3E9;
  --low:#C68A2E; --low-bg:#FEF9ED; --ok:#16A34A; --ok-bg:#DCFCE7; --check:#22C55E;
  --r-sq:8px; --r-btn:9px; --r-btn-2:11px; --r-card:14px; --r-elev:16px; --r-cta:20px; --r-pill:999px;
  --sh-hero-soft:0 20px 45px rgba(109,79,240,.10);
  --sh-report:0 20px 50px rgba(20,15,60,.06);
  --sh-nav:0 8px 30px rgba(20,15,60,.06);
  --sh-plan:0 24px 55px rgba(90,61,240,.16);
  --ease:cubic-bezier(.16,1,.3,1);
  --maxw:1280px; --pad-x:56px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--white);color:var(--ink);
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;line-height:1.5}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
img,svg{display:block}
h1,h2,h3,p{margin:0}
input{font-family:inherit}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
.wrap{max-width:var(--maxw);margin:0 auto;padding-left:var(--pad-x);padding-right:var(--pad-x)}

/* ---------- atoms ---------- */
.eyebrow{font-size:11.5px;font-weight:700;letter-spacing:.09em;color:var(--purple);text-transform:uppercase}
.link-arrow{display:inline-flex;align-items:center;gap:5px;font-size:13px;font-weight:600;color:var(--purple)}
.link-arrow svg{width:11px;height:11px}
.risk-badge{font-size:11.5px;font-weight:600;padding:5px 12px;border-radius:var(--r-pill);white-space:nowrap;display:inline-block}
.risk-high{background:var(--risk-bg);color:var(--risk)} .risk-med{background:var(--warn-bg);color:var(--warn)} .risk-low{background:var(--low-bg);color:var(--low)}
.badge-reg{font-size:11px;font-weight:600;padding:4px 10px;border-radius:var(--r-pill);background:var(--ok-bg);color:var(--ok)}
.tag-pill{font-size:11px;font-weight:600;color:var(--purple);background:var(--purple-surface);padding:4px 10px;border-radius:var(--r-pill);white-space:nowrap}
.icon-tile{border-radius:10px;background:var(--purple-surface);display:flex;align-items:center;justify-content:center;color:var(--purple);flex:none}
.card{background:var(--white);border:1px solid var(--border);border-radius:var(--r-card);padding:20px}

.btn-dark{display:inline-flex;align-items:center;gap:8px;background:var(--dark);color:#fff;font-size:13.5px;font-weight:600;
  padding:10px 18px;border-radius:var(--r-pill);white-space:nowrap;transition:transform .2s var(--ease),box-shadow .2s var(--ease)}
.btn-dark:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(16,16,20,.22)}
.btn-dark svg{width:13px;height:13px}
.btn-purple{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--purple);color:#fff;font-weight:600;
  border-radius:var(--r-btn-2);white-space:nowrap;transition:transform .2s var(--ease),box-shadow .2s var(--ease)}
.btn-purple:hover{transform:translateY(-1px);box-shadow:0 12px 26px rgba(90,61,240,.32)}
.btn-purple svg{width:13px;height:13px}
.btn-outline{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--border);color:var(--ink);
  font-size:13.5px;font-weight:600;padding:12px;border-radius:10px;background:#fff;transition:border-color .2s,background .2s}
.btn-outline:hover{border-color:var(--purple-track);background:#FBFAFF}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.85);backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid transparent;transition:border-color .25s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease)}
.nav.scrolled{border-bottom-color:var(--border-3);box-shadow:var(--sh-nav);background:rgba(255,255,255,.92)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:16px var(--pad-x)}
.brand{display:flex;align-items:center;gap:8px}
.brand .mark{width:20px;height:20px;flex:none}
.brand .name{font-size:20px;font-weight:800;color:var(--ink);letter-spacing:-.01em}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-links a{display:flex;align-items:center;gap:4px;font-size:14px;color:var(--nav);font-weight:500;transition:color .18s}
.nav-links a:hover{color:var(--ink)}
.nav-links a.active{color:var(--purple);font-weight:700}
.nav-links a.active svg{stroke:var(--purple)}
.nav-links svg{width:11px;height:11px;color:var(--muted)}
.nav-right{display:flex;align-items:center;gap:24px}
.nav-login{font-size:14px;color:var(--nav);font-weight:500;transition:color .18s}
.nav-login:hover{color:var(--ink)}
.nav-toggle{display:none;width:40px;height:40px;border-radius:10px;align-items:center;justify-content:center;color:var(--ink)}
.nav-toggle svg{width:22px;height:22px}

/* ---------- page header ---------- */
.page-head{text-align:center;padding:48px var(--pad-x) 8px}
.page-head .eyebrow{margin-bottom:14px}
.page-head h1{font-size:clamp(32px,4.6vw,44px);font-weight:700;color:var(--ink);letter-spacing:-.02em;margin:0 auto 14px;max-width:760px}
.page-head p{font-size:16px;color:var(--text);margin:0 auto;max-width:560px}
.sec-alt{background:var(--alt)}

/* ---------- footer ---------- */
.foot{padding:48px var(--pad-x) 28px;border-top:1px solid var(--border-3);background:var(--white)}
.foot-grid{display:grid;grid-template-columns:repeat(5,1fr) 1.3fr;gap:24px;margin-bottom:40px}
.foot-col .ct{font-size:13.5px;font-weight:700;color:var(--ink);margin-bottom:16px}
.foot-col a{display:block;font-size:13px;color:var(--text);margin-bottom:12px;transition:color .18s}
.foot-col a:hover{color:var(--purple)}
.foot-brand .fb-top{display:flex;align-items:center;gap:6px;margin-bottom:12px}
.foot-brand .fb-top .name{font-size:16px;font-weight:800;color:var(--ink)}
.foot-brand .fb-desc{font-size:13px;line-height:1.5;color:var(--text);margin-bottom:16px}
.socials{display:flex;gap:10px}
.socials a{width:32px;height:32px;border-radius:50%;background:var(--chip);display:flex;align-items:center;justify-content:center;color:var(--text);transition:background .18s,color .18s}
.socials a:hover{background:var(--purple-surface);color:var(--purple)}
.socials svg{width:14px;height:14px}
.foot-bottom{display:flex;align-items:center;justify-content:space-between;padding-top:24px;border-top:1px solid var(--border-3);flex-wrap:wrap;gap:12px}
.foot-bottom .cpy{font-size:12.5px;color:var(--muted)}
.foot-bottom .lang{display:flex;align-items:center;gap:6px;font-size:12.5px;color:var(--muted)}
.foot-bottom .lang svg{width:13px;height:13px}

/* ---------- reveal ---------- */
.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.js .reveal{opacity:1;transform:none;transition:none} html{scroll-behavior:auto}}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .foot-grid{grid-template-columns:repeat(3,1fr);row-gap:32px}
  .foot-brand{grid-column:1 / -1}
}
@media (max-width:900px){
  :root{--pad-x:32px}
  .nav-links,.nav-login{display:none}
  .nav-toggle{display:flex}
  .nav.nav-open .nav-links{display:flex;position:absolute;top:100%;left:0;right:0;flex-direction:column;
    align-items:flex-start;gap:4px;background:#fff;padding:16px var(--pad-x);border-bottom:1px solid var(--border-3);box-shadow:var(--sh-nav)}
  .nav.nav-open .nav-login{display:flex}
}
@media (max-width:620px){:root{--pad-x:20px} .foot-grid{grid-template-columns:repeat(2,1fr)}}