/* Siru Consulting — site styles */
@font-face{font-family:"Sora";src:url("fonts/sora-latin-400-normal.woff2") format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"Sora";src:url("fonts/sora-latin-600-normal.woff2") format("woff2");font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:"Plus Jakarta Sans";src:url("fonts/plus-jakarta-sans-latin-400-normal.woff2") format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"Plus Jakarta Sans";src:url("fonts/plus-jakarta-sans-latin-500-normal.woff2") format("woff2");font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:"Plus Jakarta Sans";src:url("fonts/plus-jakarta-sans-latin-600-normal.woff2") format("woff2");font-weight:600;font-style:normal;font-display:swap}

:root{
  --ink:#2B2A2E; --ink-deep:#232226; --ink-soft:#3F3D42; --mute:#5C5650;
  --coral:#C2553D; --coral-text:#A8462F; --coral-light:#E8836B;
  --paper:#FAF6F0; --white:#FFFFFF; --blush:#F1D9CF; --tag-bg:#F6E4DC; --tag-ink:#8E3A27;
  --line:#E9E1D6; --line-dark:#45434A; --on-dark:#FAF6F0; --on-dark-mute:#CFC8C0; --on-dark-faint:#A9A29A;
  --display:"Sora","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --body:"Plus Jakarta Sans","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --wrap:1200px; --radius:18px; --ease:cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased}
img,svg{display:block;max-width:100%}
a{color:var(--coral-text)}
a:hover{color:var(--ink)}
:focus-visible{outline:3px solid var(--coral);outline-offset:3px;border-radius:6px}
h1,h2,h3{font-family:var(--display);font-weight:600;letter-spacing:-.02em;margin:0;color:inherit}
p{margin:0}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-9999px;top:8px;background:var(--ink);color:var(--paper);padding:10px 16px;border-radius:8px;z-index:100}
.skip:focus{left:16px}
.eyebrow{font-size:13px;letter-spacing:.24em;text-transform:uppercase;font-weight:600;color:var(--coral-text)}
:lang(zh) .eyebrow{letter-spacing:.16em}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(250,246,240,.86);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid transparent;transition:border-color .3s,box-shadow .3s}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 6px 24px rgba(43,42,46,.05)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:16px;padding-bottom:16px}
.brand{display:flex;align-items:center;text-decoration:none}
.brand img{height:34px;width:auto}
.nav-links{display:flex;align-items:center;gap:28px;font-size:15px;font-weight:500}
.nav-links a{color:var(--ink);text-decoration:none;position:relative}
.nav-links a.link::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;background:var(--coral);transform:scaleX(0);transform-origin:left;transition:transform .35s var(--ease)}
.nav-links a.link:hover::after{transform:scaleX(1)}
.lang{display:flex;border:1px solid #D9CFC2;border-radius:999px;overflow:hidden;font-size:13px}
.lang a{padding:6px 12px;text-decoration:none;color:var(--ink)}
.lang a[aria-current="true"]{background:var(--ink);color:var(--paper)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:12px 24px;border-radius:999px;font-weight:600;font-size:16px;text-decoration:none;transition:transform .25s var(--ease),background .25s,color .25s,box-shadow .25s}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--coral);color:var(--white)}
.btn-primary:hover{background:var(--coral-text);color:var(--white);box-shadow:0 10px 24px rgba(194,85,61,.25)}
.btn-dark{background:var(--ink);color:var(--paper)}
.btn-dark:hover{background:var(--ink-deep);color:var(--paper);box-shadow:0 10px 24px rgba(43,42,46,.2)}
.btn-ghost{border:1px solid var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--paper)}
.btn .arrow{transition:transform .25s var(--ease)}
.btn:hover .arrow{transform:translateX(3px)}
.nav .btn{min-height:42px;padding:10px 20px;font-size:15px}

/* Hero */
.hero{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,340px),1fr));gap:48px;align-items:center;padding-top:88px;padding-bottom:80px}
.hero-copy{display:flex;flex-direction:column;gap:26px}
.hero h1{font-size:clamp(40px,5.4vw,70px);line-height:1.05;letter-spacing:-.03em}
:lang(zh) .hero h1{letter-spacing:0;line-height:1.2}
.hero h1 em{font-style:normal;color:var(--coral)}
.hero .lead{font-size:19px;line-height:1.7;color:var(--ink-soft);max-width:35rem}
.actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-art{display:flex;justify-content:center}
.hero-art svg{width:min(440px,100%);height:auto}
.orbit{transform-origin:100px 100px;animation:spin 60s linear infinite}
.orbit-rev{transform-origin:100px 100px;animation:spin 90s linear infinite reverse}
.arc{stroke-dasharray:120;stroke-dashoffset:120;animation:draw 1.6s var(--ease) forwards}
.arc-2{animation-delay:.45s}
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes spin{to{transform:rotate(360deg)}}

/* Marquee */
.marquee{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--white);overflow:hidden}
.marquee-track{display:flex;width:max-content;animation:marquee 40s linear infinite}
.marquee:hover .marquee-track{animation-play-state:paused}
.marquee ul{display:flex;align-items:center;gap:44px;list-style:none;margin:0;padding:18px 22px;font-family:var(--display);font-weight:600;font-size:15px;white-space:nowrap}
.marquee li.dot{color:var(--coral);font-size:11px}
@keyframes marquee{to{transform:translateX(-50%)}}

/* Sections */
.section{padding-top:104px;padding-bottom:104px}
.section-head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:48px}
.section-head .titles{display:flex;flex-direction:column;gap:14px;max-width:44rem}
.section h2{font-size:clamp(30px,3.4vw,46px);line-height:1.15}
:lang(zh) .section h2{letter-spacing:0;line-height:1.3}
.rule{width:56px;height:3px;background:var(--coral);border-radius:2px}

/* Services */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:24px}
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:36px 32px;display:flex;flex-direction:column;gap:18px;transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s}
.card:hover{transform:translateY(-6px);box-shadow:0 18px 40px rgba(43,42,46,.08);border-color:#E2D3C4}
.card .num{font-family:var(--display);font-weight:600;font-size:14px;color:var(--coral-text)}
.card h3{font-size:24px;line-height:1.25}
.card p{font-size:16px;line-height:1.7;color:var(--ink-soft)}
.card p + p{margin-top:-6px}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding:0;list-style:none}
.tags li{font-size:13px;padding:6px 12px;border-radius:999px;background:var(--tag-bg);color:var(--tag-ink)}
.card.dark{background:var(--ink);border-color:var(--ink);color:var(--on-dark)}
.card.dark .num{color:var(--coral-light)}
.card.dark p{color:var(--on-dark-mute)}
.card.dark .tags li{background:#3A383E;color:#F3D3C8}

/* Approach */
.band{background:var(--white);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr));border-top:2px solid var(--ink)}
.steps li{padding:28px 24px 8px 0;display:flex;flex-direction:column;gap:12px}
.steps .n{font-family:var(--display);font-weight:600;font-size:40px;color:#D9CFC2;transition:color .4s}
.steps li:hover .n,.steps li:last-child .n{color:var(--coral)}
.steps h3{font-size:20px}
.steps p{font-size:15px;line-height:1.7;color:var(--ink-soft)}

/* About */
.about{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,340px),1fr));gap:56px;align-items:start}
.about .titles{display:flex;flex-direction:column;gap:14px}
.about .body{display:flex;flex-direction:column;gap:22px;font-size:17px;line-height:1.8;color:var(--ink-soft)}
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px;margin:8px 0 0;padding:0}
.facts div{border-top:1px solid #D9CFC2;padding-top:14px}
.facts dt{font-family:var(--display);font-size:15px;font-weight:600;color:var(--ink)}
.facts dd{margin:0;font-size:15px}

/* Contact */
.contact{background:var(--ink);color:var(--on-dark)}
.contact .eyebrow{color:var(--coral-light)}
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,340px),1fr));gap:48px;align-items:end}
.contact h2{font-size:clamp(32px,3.8vw,52px);line-height:1.1}
:lang(zh) .contact h2{letter-spacing:0;line-height:1.3}
.contact-list{margin:0;padding:0;border-top:1px solid var(--line-dark)}
.contact-list div{display:flex;justify-content:space-between;align-items:baseline;gap:16px;padding:22px 0;border-bottom:1px solid var(--line-dark);font-size:20px}
.contact-list dt{color:var(--on-dark-faint);font-size:15px}
.contact-list dd{margin:0;text-align:right}
.contact-list a{color:var(--on-dark);text-decoration:none;background-image:linear-gradient(var(--coral-light),var(--coral-light));background-size:0 1px;background-position:0 100%;background-repeat:no-repeat;transition:background-size .35s var(--ease)}
.contact-list a:hover{background-size:100% 1px;color:var(--on-dark)}

/* Footer */
.site-footer{background:var(--ink-deep);color:var(--on-dark-faint)}
.footer-inner{display:flex;flex-direction:column;gap:22px;padding-top:40px;padding-bottom:48px}
.footer-top{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;font-size:14px}
.footer-top img{height:28px;width:auto}
.disclaimer{font-size:13px;line-height:1.75;max-width:64rem}

/* 404 */
.notfound{min-height:70vh;display:flex;flex-direction:column;justify-content:center;gap:24px;padding-top:80px;padding-bottom:80px}
.notfound h1{font-size:clamp(36px,5vw,60px)}

/* Scroll reveal (only when JS is running) */
.js .reveal{opacity:0;transform:translateY(24px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.js .reveal.is-in{opacity:1;transform:none}
.js .reveal.d1{transition-delay:.08s}.js .reveal.d2{transition-delay:.16s}.js .reveal.d3{transition-delay:.24s}

/* Small screens */
@media (max-width:760px){
  body{font-size:16px}
  .nav-links .link{display:none}
  .nav-links{gap:12px}
  .brand img{height:28px}
  .hero{padding-top:56px;padding-bottom:56px;gap:32px}
  .hero-art{order:-1}
  .hero-art svg{width:220px}
  .section{padding-top:72px;padding-bottom:72px}
  .contact-list div{flex-direction:column;align-items:flex-start;gap:4px}
  .contact-list dd{text-align:left}
}
@media (max-width:420px){
  .nav .btn{display:none}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .arc{stroke-dashoffset:0}
  .js .reveal{opacity:1;transform:none}
}