/* Watchdog Strata — "Tower log" identity.
   Navy ink + amber signal (shared with the resident app), Archivo's width axis as the type signature:
   expanded for display, condensed for labels. Mono for anything that is a record. */
:root{
  --ink:#14213D; --ink-2:#22325A; --tower:#2B4C7E; --tower-2:#3E6AA8; --signal:#E8A33D; --signal-2:#F5C46B; --signal-soft:#FBEFD9;
  --paper:#F3F5F8; --card:#FFFFFF; --line:#DCE2EA; --line-2:#C6CFDB; --muted:#5D6B82; --good:#2F8F6B; --good-soft:#E2F3EC; --alert:#C8463D; --alert-soft:#FBE6E3; --wait:#7A5AC0;
  --display:'Archivo',system-ui,sans-serif; --body:'Figtree',system-ui,-apple-system,'Segoe UI',sans-serif; --mono:'JetBrains Mono',ui-monospace,Menlo,monospace;
  --zh:'PingFang SC','Noto Sans SC','Microsoft YaHei','Hiragino Sans GB',sans-serif;
  --r:14px; --wrap:1180px; --shadow:0 1px 2px rgba(20,33,61,.06),0 10px 30px rgba(20,33,61,.08);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:84px}
body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.6 var(--body);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
html[lang^=zh] body{font-family:var(--body),var(--zh)}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--tower);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{color:var(--ink)}
:focus-visible{outline:3px solid var(--signal);outline-offset:2px;border-radius:4px}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-9999px;top:8px;background:var(--ink);color:#fff;padding:10px 14px;border-radius:8px;z-index:99}
.skip:focus{left:12px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- type ---------- */
h1,h2,h3,.disp{font-family:var(--display);font-variation-settings:'wdth' 112;letter-spacing:-.015em;line-height:1.08;margin:0 0 .5em;font-weight:780}
h1{font-size:clamp(2.2rem,5.2vw,4.1rem);font-variation-settings:'wdth' 118}
h2{font-size:clamp(1.6rem,3.1vw,2.45rem)}
h3{font-size:1.22rem;font-variation-settings:'wdth' 104;letter-spacing:-.005em;font-weight:720}
p{margin:0 0 1em}
.eyebrow,.label{font-family:var(--display);font-variation-settings:'wdth' 66;text-transform:uppercase;letter-spacing:.14em;font-size:.8rem;font-weight:700;color:var(--tower)}
.eyebrow{display:inline-flex;align-items:center;gap:10px;margin-bottom:14px}
.eyebrow::before{content:'';width:22px;height:3px;background:var(--signal);border-radius:2px}
.lede{font-size:clamp(1.08rem,1.6vw,1.28rem);color:var(--ink-2);max-width:62ch}
.mono{font-family:var(--mono);font-size:.86em}
.muted{color:var(--muted)}
.small{font-size:.9rem}

/* ---------- header ---------- */
.top{position:sticky;top:0;z-index:50;background:rgba(243,245,248,.88);backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid transparent;transition:border-color .2s}
.top.scrolled{border-bottom-color:var(--line)}
.top .wrap{display:flex;align-items:center;gap:22px;height:70px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-family:var(--display);font-weight:800;font-variation-settings:'wdth' 120;font-size:1.12rem;letter-spacing:-.01em;white-space:nowrap}
.brand small{display:block;font-variation-settings:'wdth' 66;font-weight:700;letter-spacing:.2em;font-size:.6rem;color:var(--muted);text-transform:uppercase;margin-top:1px}
.brand svg{width:34px;height:34px;flex:none}
.nav{display:flex;gap:4px;margin-left:auto;align-items:center}
.nav a{color:var(--ink);text-decoration:none;font-weight:600;font-size:.95rem;padding:8px 12px;border-radius:9px}
.nav a:hover,.nav a[aria-current=page]{background:#E6EBF2}
.nav .btn{margin-left:6px}
.menu-btn{display:none;margin-left:auto;background:none;border:1px solid var(--line-2);border-radius:10px;padding:8px 10px;color:var(--ink);font:600 .9rem var(--body)}
@media (max-width:960px){
  .menu-btn{display:inline-flex}
  .nav{display:none;position:absolute;top:70px;left:0;right:0;background:var(--paper);flex-direction:column;align-items:stretch;padding:10px 18px 20px;border-bottom:1px solid var(--line);gap:2px}
  .nav.open{display:flex}
  .nav a{padding:12px}
  .nav .btn{margin:6px 0 0;justify-content:center}
}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;border:0;border-radius:11px;padding:12px 18px;font:700 .98rem var(--body);text-decoration:none;cursor:pointer;background:var(--ink);color:#fff;transition:transform .12s,background .2s,box-shadow .2s;white-space:nowrap}
.btn:hover{background:var(--ink-2);color:#fff;transform:translateY(-1px)}
.btn.amber{background:var(--signal);color:var(--ink)}
.btn.amber:hover{background:var(--signal-2);color:var(--ink)}
.btn.ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--line-2)}
.btn.ghost:hover{box-shadow:inset 0 0 0 1.5px var(--ink);background:transparent}
.btn.sm{padding:9px 14px;font-size:.9rem}
.btn svg{width:18px;height:18px}
.ctas{display:flex;gap:12px;flex-wrap:wrap;align-items:center}

/* ---------- hero (home) ---------- */
.hero{padding:56px 0 70px;position:relative;overflow:hidden}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1 em{font-style:normal;color:var(--tower);font-variation-settings:'wdth' 125}
.hero .lede{margin:18px 0 26px}
.trust{display:flex;gap:18px;flex-wrap:wrap;margin-top:26px;font-size:.92rem;color:var(--muted)}
.trust span{display:inline-flex;align-items:center;gap:7px}
.trust svg{width:17px;height:17px;color:var(--good)}
@media (max-width:960px){.hero .wrap{grid-template-columns:1fr;gap:40px}.hero{padding:30px 0 50px}}

/* The signature: a tower cross-section where every floor is a live log line. */
.tower{position:relative;background:var(--ink);border-radius:22px 22px 10px 10px;padding:18px 18px 0;box-shadow:var(--shadow);color:#E9EEF6;isolation:isolate}
.tower::before{content:'';position:absolute;inset:-1px;border-radius:inherit;background:linear-gradient(180deg,rgba(232,163,61,.35),transparent 40%);z-index:-1;opacity:.5}
.tower-head{display:flex;justify-content:space-between;align-items:center;font-family:var(--mono);font-size:.74rem;color:#9FB0C9;padding:0 4px 12px;border-bottom:1px dashed #33456B}
.tower-head b{color:#fff;font-family:var(--display);font-variation-settings:'wdth' 70;letter-spacing:.14em;text-transform:uppercase;font-size:.78rem}
.live{display:inline-flex;align-items:center;gap:7px}
.live i{width:8px;height:8px;border-radius:50%;background:var(--good);box-shadow:0 0 0 0 rgba(47,143,107,.7);animation:pulse 2s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 9px rgba(47,143,107,0)}100%{box-shadow:0 0 0 0 rgba(47,143,107,0)}}
.floors{list-style:none;margin:0;padding:6px 0 0}
.floor{display:grid;grid-template-columns:52px 1fr auto;gap:12px;align-items:center;padding:11px 4px;border-bottom:1px solid #22345A;opacity:0;transform:translateY(6px);animation:rise .5s forwards}
.floor:last-child{border-bottom:0}
.lvl{font-family:var(--display);font-variation-settings:'wdth' 62;font-weight:800;font-size:.95rem;color:var(--ink);background:#E9EEF6;border-radius:8px;text-align:center;padding:5px 0;box-shadow:inset 0 -3px 0 rgba(20,33,61,.18)}
.floor.hot .lvl{background:var(--signal)}
.floor p{margin:0;font-size:.92rem;line-height:1.35;color:#fff}
.floor p span{display:block;font-family:var(--mono);font-size:.72rem;color:#8FA2C0;margin-top:2px}
.tag{font-family:var(--display);font-variation-settings:'wdth' 66;font-weight:700;letter-spacing:.08em;text-transform:uppercase;font-size:.66rem;padding:4px 8px;border-radius:6px;background:#22345A;color:#C9D5E8;white-space:nowrap}
.tag.good{background:rgba(47,143,107,.22);color:#8FE0BE}.tag.amber{background:rgba(232,163,61,.2);color:var(--signal-2)}.tag.red{background:rgba(200,70,61,.25);color:#FFB3AB}
.lobby{display:flex;justify-content:space-between;align-items:center;margin:0 -18px;padding:12px 22px;background:#0E1830;border-radius:0 0 10px 10px;font-family:var(--mono);font-size:.74rem;color:#8FA2C0}
.lobby b{color:var(--signal)}
@keyframes rise{to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){.floor{animation:none;opacity:1;transform:none}.live i{animation:none}}

/* ---------- sections ---------- */
.sec{padding:84px 0}
.sec.tight{padding:56px 0}
.sec.dark{background:var(--ink);color:#E9EEF6}
.sec.dark h2,.sec.dark h3{color:#fff}
.sec.dark .eyebrow{color:var(--signal-2)}
.sec.dark .lede,.sec.dark p{color:#C9D5E8}
.sec.white{background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.head{max-width:760px;margin-bottom:40px}
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media (max-width:960px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.g2,.g3,.g4{grid-template-columns:1fr}.sec{padding:60px 0}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:24px;position:relative}
.card h3{margin-bottom:.35em}
.card p{color:var(--ink-2);font-size:.98rem;margin:0}
a.card{text-decoration:none;color:inherit;transition:border-color .2s,transform .15s,box-shadow .2s}
a.card:hover{border-color:var(--tower);transform:translateY(-2px);box-shadow:var(--shadow)}
a.card .more{display:inline-block;margin-top:12px;font-weight:700;color:var(--tower);font-size:.92rem}
.ico{width:42px;height:42px;border-radius:11px;background:var(--signal-soft);color:#9A6411;display:grid;place-items:center;margin-bottom:14px}
.ico svg{width:22px;height:22px}
.sec.dark .card{background:#1B2B4E;border-color:#2C3F68}
.sec.dark .card p{color:#C9D5E8}

/* differentiators: numbered because it IS a ranked list on the page */
.proof{counter-reset:p;display:grid;gap:0;border-top:1px solid #2C3F68}
.proof li{list-style:none;display:grid;grid-template-columns:72px 1fr 1.1fr;gap:24px;padding:26px 0;border-bottom:1px solid #2C3F68;align-items:start}
.proof li::before{counter-increment:p;content:counter(p,decimal-leading-zero);font-family:var(--mono);color:var(--signal);font-size:.95rem;padding-top:4px}
.proof h3{margin:0;font-size:1.3rem}
.proof p{margin:0}
@media (max-width:760px){.proof li{grid-template-columns:44px 1fr}.proof li p{grid-column:2}}

/* roles strip */
.roles{display:grid;grid-template-columns:repeat(6,1fr);gap:10px}
.roles a{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;text-decoration:none;color:var(--ink);font-weight:700;font-size:.95rem;display:flex;flex-direction:column;gap:6px}
.roles a span{font-weight:500;color:var(--muted);font-size:.84rem;line-height:1.35}
.roles a:hover{border-color:var(--tower)}
@media (max-width:960px){.roles{grid-template-columns:repeat(3,1fr)}}
@media (max-width:560px){.roles{grid-template-columns:repeat(2,1fr)}}

/* screens */
.shots{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;align-items:start}
.shot{margin:0}
.shot img{border-radius:22px;border:6px solid var(--ink);box-shadow:var(--shadow);background:#fff;aspect-ratio:9/17;object-fit:cover;object-position:top;width:100%}
.shot figcaption{font-size:.88rem;color:var(--muted);margin-top:10px;text-align:center}
@media (max-width:960px){.shots{grid-template-columns:repeat(2,1fr)}}

/* split media row */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split.rev>:first-child{order:2}
@media (max-width:900px){.split{grid-template-columns:1fr;gap:28px}.split.rev>:first-child{order:0}}
.ticks{list-style:none;padding:0;margin:18px 0 0;display:grid;gap:10px}
.ticks li{display:grid;grid-template-columns:22px 1fr;gap:10px;align-items:start}
.ticks li::before{content:'';width:18px;height:18px;margin-top:4px;border-radius:5px;background:var(--good-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232F8F6B' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12.5l4.5 4.5L19 7.5'/%3E%3C/svg%3E") center/12px no-repeat}
.ticks.no li::before{background:var(--alert-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23C8463D' stroke-width='3.2' stroke-linecap='round'%3E%3Cpath d='M7 7l10 10M17 7L7 17'/%3E%3C/svg%3E") center/11px no-repeat}

/* ---------- page header (inner pages) ---------- */
.phead{padding:44px 0 34px}
.phead h1{font-size:clamp(2rem,4.4vw,3.3rem);max-width:20ch}
.crumbs{font-size:.86rem;color:var(--muted);margin-bottom:18px;display:flex;flex-wrap:wrap;gap:6px}
.crumbs a{color:var(--muted)}
.crumbs span[aria-hidden]{opacity:.5}
.answer{background:var(--card);border:1px solid var(--line);border-left:5px solid var(--signal);border-radius:12px;padding:20px 22px;font-size:1.08rem;max-width:860px;margin-top:22px;color:var(--ink)}
.answer .label{display:block;margin-bottom:6px;color:#9A6411}
.stamp{font-family:var(--mono);font-size:.76rem;color:var(--muted);margin-top:14px;display:flex;gap:14px;flex-wrap:wrap}

/* ---------- article layout ---------- */
.article{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;padding-bottom:70px;align-items:start}
@media (max-width:1000px){.article{grid-template-columns:1fr;gap:30px}}
.prose{max-width:760px}
.prose h2{font-size:1.75rem;margin-top:1.8em}
.prose h3{margin-top:1.5em}
.prose ul,.prose ol{padding-left:1.25em;margin:0 0 1.1em}
.prose li{margin:.3em 0}
.prose table{margin:1.2em 0}
.tbl{width:100%;border-collapse:separate;border-spacing:0;background:var(--card);border:1px solid var(--line);border-radius:12px;overflow:hidden;font-size:.94rem;display:table}
@media (max-width:700px){.tbl{display:block;overflow-x:auto}}
.tbl thead th{background:var(--ink);color:#fff;font-family:var(--display);font-variation-settings:'wdth' 80;font-weight:700;text-align:left;letter-spacing:.02em}
.tbl th,.tbl td{padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left}
.tbl tbody tr:last-child td,.tbl tbody tr:last-child th{border-bottom:0}
.tbl tbody th{font-weight:700;background:#F8FAFC;min-width:150px}
.tbl tbody tr:nth-child(even) td{background:#FBFCFD}
.callout{background:#EAF0F8;border-radius:12px;padding:16px 18px;margin:1.2em 0;border-left:4px solid var(--tower)}
.callout.warn{background:var(--signal-soft);border-left-color:var(--signal)}
.tldr{background:var(--ink);color:#E9EEF6;border-radius:14px;padding:20px 24px 12px;margin:0 0 1.6em}
.tldr::before{content:'Key points';display:block;font-family:var(--display);font-variation-settings:'wdth' 66;text-transform:uppercase;letter-spacing:.14em;font-size:.76rem;font-weight:700;color:var(--signal-2);margin-bottom:8px}
.tldr ul{margin:0;padding-left:1.1em}.tldr li{margin:.35em 0}
.note{font-size:.88rem;color:var(--muted);border-top:1px solid var(--line);padding-top:14px;margin-top:2em}
.aside{position:sticky;top:90px;display:grid;gap:16px}
.aside .card{padding:20px}
.aside h3{font-size:1rem}
.aside ul{list-style:none;padding:0;margin:0;display:grid;gap:8px;font-size:.94rem}
.toc a{text-decoration:none}
.faq{margin-top:2.4em}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:12px;margin:10px 0;padding:0 18px}
.faq summary{cursor:pointer;font-weight:700;padding:16px 0;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:'+';font-family:var(--mono);color:var(--tower);font-size:1.2rem;line-height:1}
.faq details[open] summary::after{content:'–'}
.faq details p{margin:0 0 16px;color:var(--ink-2)}
.sources{font-size:.9rem;margin-top:2em}
.sources ol{padding-left:1.2em}
.sources li{margin:.35em 0;word-break:break-word}

/* glossary */
.terms{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.terms dt{font-family:var(--display);font-variation-settings:'wdth' 104;font-weight:750;font-size:1.08rem}
.terms div{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px}
.terms dd{margin:6px 0 0;color:var(--ink-2);font-size:.96rem}
@media (max-width:760px){.terms{grid-template-columns:1fr}}

/* pricing */
.price-card{background:var(--card);border:2px solid var(--ink);border-radius:20px;padding:34px;box-shadow:var(--shadow)}
.price{font-family:var(--display);font-variation-settings:'wdth' 120;font-weight:800;font-size:clamp(3rem,7vw,4.6rem);line-height:1;letter-spacing:-.03em}
.price small{font-family:var(--body);font-size:1rem;font-weight:600;color:var(--muted);letter-spacing:0}
.calc{display:grid;gap:10px;margin-top:20px;background:var(--paper);border-radius:12px;padding:18px}
.calc label{font-weight:700;font-size:.94rem;display:flex;justify-content:space-between}
.calc input[type=range]{width:100%;accent-color:var(--ink)}
.calc output{font-family:var(--mono)}

/* forms */
.form{display:grid;gap:14px}
.form label{display:grid;gap:6px;font-weight:600;font-size:.94rem}
.form input,.form select,.form textarea{font:inherit;font-size:1rem;padding:12px 14px;border:1.5px solid var(--line-2);border-radius:10px;background:#fff;color:var(--ink);width:100%}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--tower);box-shadow:0 0 0 3px rgba(43,76,126,.15)}
.form textarea{min-height:120px;resize:vertical}
.form .two{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:560px){.form .two{grid-template-columns:1fr}}
.hp{position:absolute;left:-5000px}
.ok{background:var(--good-soft);border-radius:12px;padding:16px;color:#1F5E46;font-weight:600}
.err{background:var(--alert-soft);border-radius:12px;padding:12px 14px;color:#8E2C24}

/* login chooser */
.bld{display:flex;align-items:center;gap:16px;padding:18px 20px}
.bld .lvl{width:54px;flex:none;padding:8px 0;font-size:1rem}

/* CTA band */
.band{background:var(--signal);color:var(--ink);border-radius:22px;padding:44px;display:grid;grid-template-columns:1.3fr auto;gap:30px;align-items:center}
.band h2{margin:0 0 .25em}
.band p{margin:0;color:#3A2A0C}
@media (max-width:760px){.band{grid-template-columns:1fr;padding:30px}}

/* footer */
.foot{background:var(--ink);color:#B8C5DA;padding:64px 0 34px;margin-top:80px;font-size:.93rem}
.foot a{color:#DCE4F0;text-decoration:none}
.foot a:hover{color:#fff;text-decoration:underline}
.foot .cols{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:30px}
.foot h4{font-family:var(--display);font-variation-settings:'wdth' 66;text-transform:uppercase;letter-spacing:.14em;font-size:.76rem;color:var(--signal-2);margin:0 0 12px}
.foot ul{list-style:none;margin:0;padding:0;display:grid;gap:7px}
.foot .brand{color:#fff}
.foot .legal{border-top:1px solid #2C3F68;margin-top:40px;padding-top:20px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:.84rem}
@media (max-width:900px){.foot .cols{grid-template-columns:1fr 1fr}}
.lang a{font-family:var(--zh)}