:root{--bg:#f5f5f7;--card:rgba(255,255,255,.78);--text:#1d1d1f;--subtext:#6e6e73;--line:rgba(0,0,0,.08);--white:#fff;--black:#111;--blue:#0071e3;--shadow:0 10px 30px rgba(0,0,0,.06);--radius-xl:28px;--radius-lg:20px;--radius-md:14px;--radius-sm:10px}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","PingFang SC","Helvetica Neue",Arial,sans-serif;color:var(--text);background:linear-gradient(180deg,#fbfbfd 0%,#f5f5f7 100%);line-height:1.6}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}button{border:none;background:none}input,textarea,select{width:100%;border:1px solid var(--line);background:rgba(255,255,255,.95);border-radius:16px;padding:14px 16px;outline:none;color:var(--text)}.container{width:min(1200px,calc(100% - 40px));margin:0 auto}.topbar{position:sticky;top:0;z-index:50;backdrop-filter:blur(18px);background:rgba(255,255,255,.72);border-bottom:1px solid var(--line)}.nav{min-height:76px;display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;column-gap:24px}.logo{display:flex;align-items:center;gap:10px;font-weight:600;font-size:18px;line-height:1;justify-self:start}.logo-mark{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;overflow:hidden;background:#fff}.logo-mark-image{width:100%;height:100%;object-fit:contain;display:block}.nav-links{display:flex;align-items:center;justify-self:center;gap:28px}.nav-links a{display:inline-flex;align-items:center;justify-content:center;min-height:40px;color:var(--subtext);border-bottom:2px solid transparent;line-height:1}.nav-links a.active,.nav-links a:hover{color:var(--black);border-bottom-color:var(--black)}.nav-actions{display:flex;gap:12px;align-items:center;justify-self:end}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:42px;padding:10px 18px;border-radius:999px;line-height:1;cursor:pointer}.btn-dark{background:var(--black);color:#fff}.btn-light{background:#fff;border:1px solid var(--line);color:var(--text)}.hero{padding:78px 0 48px}.hero-inner{max-width:860px;text-align:center}.hero h1{font-size:clamp(34px,5vw,60px);line-height:1.08;letter-spacing:-.03em}.hero-desc{color:var(--subtext);font-size:18px;max-width:700px;margin:18px auto 28px}.layout,.page-grid,.publish-page,.message-page,.auth-wrap{display:grid;gap:24px}.layout{grid-template-columns:1.8fr .9fr;padding-bottom:48px}.page-grid{grid-template-columns:1.6fr .85fr;padding:34px 0 48px}.publish-page{grid-template-columns:1.5fr .8fr;padding:34px 0 48px}.message-page{grid-template-columns:360px 1fr;padding:34px 0 48px;min-height:calc(100vh - 120px);height:calc(100vh - 120px);overflow:hidden}.auth-wrap{grid-template-columns:1.1fr .9fr;align-items:center;min-height:calc(100vh - 100px);padding:32px 0 56px}.sidebar{display:flex;flex-direction:column;gap:18px}.section-card{background:var(--card);border:1px solid rgba(255,255,255,.65);border-radius:var(--radius-xl);backdrop-filter:blur(20px);box-shadow:var(--shadow)}.feed{display:flex;flex-direction:column}h1,h2,h3{font-weight:600}h1{font-size:clamp(28px,4vw,60px);line-height:1.08}h2{font-size:21px;line-height:1.35}h3{font-size:18px}p{margin:0}@media(max-width:1080px){.layout,.page-grid,.publish-page,.message-page,.auth-wrap{grid-template-columns:1fr}.sidebar{order:-1}}@media(max-width:760px){.container{width:min(100% - 24px,1200px)}.nav-links{display:none}.nav{grid-template-columns:minmax(0,1fr) auto;min-height:68px}.hero{padding-top:54px}.hero h1{font-size:36px}.hero-desc{font-size:16px}}