/* ============================================================
   ARCH · 建筑与设计手记 — Retro/Vintage Design System (v1)
   Template: web12 / set15
   ============================================================ */

/* === RESET === */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);background:var(--paper);color:var(--ink);line-height:1.9;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .35s}
a:hover{color:var(--brick)}
ul{list-style:none}
input,button{font-family:inherit;font-size:inherit}

/* === VARIABLES === */
:root{
  --paper:#f2ede4;
  --paper-light:#f8f4ed;
  --ink:#2c2420;
  --ink-soft:#5a4f48;
  --ink-light:#8a7f77;
  --brick:#a04535;
  --brick-dark:#7a3024;
  --brick-light:rgba(160,69,53,.1);
  --gold:#b8956e;
  --line:#cdc3b8;
  --line-light:#ddd5cb;
  --stamp:#c4412b;
  --font:'Georgia','Times New Roman','Noto Serif SC',serif;
  --font-h:'Georgia','Times New Roman','Noto Serif SC',serif;
  --font-m:'Courier New','Noto Sans SC',monospace;
  --container:1100px;
  --container-narrow:660px;
  --header-h:72px;
  --ease:.35s ease;
}

/* === TYPOGRAPHY === */
.display{font-family:var(--font-h);font-weight:400;font-size:clamp(36px,5.5vw,62px);line-height:1.15;letter-spacing:-.01em;color:var(--ink)}
.display-sm{font-family:var(--font-h);font-weight:400;font-size:clamp(22px,3vw,34px);line-height:1.3;color:var(--ink)}
.section-title{font-family:var(--font-h);font-weight:400;font-size:clamp(24px,3vw,34px);line-height:1.2;color:var(--ink);margin-bottom:8px}
.section-sub{font-size:14px;color:var(--ink-light);line-height:1.7;max-width:480px;font-family:var(--font)}
.label{display:block;font-family:var(--font-m);font-size:10px;font-weight:400;text-transform:uppercase;letter-spacing:.2em;color:var(--brick);margin-bottom:12px}
.label-line{display:block;font-family:var(--font-m);font-size:10px;font-weight:400;text-transform:uppercase;letter-spacing:.2em;color:var(--ink-light);margin-bottom:12px}
.body-lg{font-size:16px;line-height:1.9;color:var(--ink-soft)}
.body-sm{font-size:13px;line-height:1.7;color:var(--ink-light)}

/* === LAYOUT === */
.container{max-width:var(--container);margin:0 auto;padding:0 28px}
.container-narrow{max-width:var(--container-narrow);margin:0 auto;padding:0 28px}
.section{padding:100px 0}
.section-sm{padding:60px 0}
.section-head{margin-bottom:56px}
.section-head-centered{text-align:center;margin-bottom:56px}

/* === DECORATIVE === */
.rule{width:60px;height:2px;background:var(--brick);margin-bottom:20px}
.rule-center{margin-left:auto;margin-right:auto}
.ornament{display:block;text-align:center;font-size:24px;color:var(--line);letter-spacing:.5em;margin:56px 0;font-family:var(--font)}

/* === HEADER === */
.site-header{
  position:fixed;top:0;left:0;right:0;height:var(--header-h);z-index:100;
  background:var(--paper);border-bottom:2px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;padding:0 32px;
}
.site-logo{font-family:var(--font-h);font-size:20px;font-weight:400;letter-spacing:.08em;color:var(--ink);text-transform:uppercase}
.site-logo .gold{color:var(--gold)}
.nav-list{display:flex;gap:36px;align-items:center}
.nav-list a{font-family:var(--font-m);font-size:11px;font-weight:400;text-transform:uppercase;letter-spacing:.18em;color:var(--ink-soft);transition:color var(--ease);padding:4px 0}
.nav-list a:hover,.nav-list a.active{color:var(--brick);border-bottom:1px solid var(--brick)}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:4px;flex-direction:column;gap:5px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--ink);transition:all var(--ease)}

/* === BUTTONS === */
.btn{display:inline-block;padding:12px 32px;font-family:var(--font-m);font-size:11px;font-weight:400;text-transform:uppercase;letter-spacing:.18em;
  border:1px solid var(--ink);color:var(--ink);background:transparent;cursor:pointer;transition:all var(--ease);text-align:center}
.btn:hover{opacity:1;background:var(--ink);color:var(--paper)}
.btn-sm{padding:8px 22px;font-size:10px}
.btn-brick{border-color:var(--brick);color:var(--brick);background:var(--brick-light)}
.btn-brick:hover{background:var(--brick);color:var(--paper)}
.btn-line{border-color:var(--line);color:var(--ink-soft)}
.btn-line:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}

/* === HERO (editorial card stack) === */
.hero-stack{
  min-height:100vh;padding-top:var(--header-h);display:flex;align-items:center;
  position:relative;overflow:hidden;background:var(--paper);
}
.hero-stack::before{content:'';position:absolute;top:0;left:0;right:30%;bottom:0;background:var(--paper-light);z-index:0}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding:80px 0}
.hero-text .label{margin-bottom:16px}
.hero-text h1{margin-bottom:20px}
.hero-text .hero-desc{font-size:15px;color:var(--ink-soft);line-height:1.9;margin-bottom:32px;max-width:420px}
.hero-image{position:relative;aspect-ratio:4/5;overflow:hidden;border:1px solid var(--line);background:var(--paper-light)}
.hero-image img{width:100%;height:100%;object-fit:cover}
.hero-image .caption{position:absolute;bottom:0;left:0;right:0;padding:12px 16px;background:rgba(242,237,228,.9);font-family:var(--font-m);font-size:10px;text-transform:uppercase;letter-spacing:.15em;color:var(--ink-soft)}

/* === MANIFESTO (pull quote) === */
.manifesto{
  padding:100px 28px;text-align:center;background:var(--paper-light);
  border-top:2px solid var(--line);border-bottom:2px solid var(--line);
}
.manifesto blockquote{font-family:var(--font-h);font-weight:400;font-size:clamp(22px,3.5vw,40px);line-height:1.4;color:var(--ink);max-width:720px;margin:0 auto}
.manifesto cite{display:block;margin-top:24px;font-family:var(--font-m);font-size:11px;text-transform:uppercase;letter-spacing:.2em;color:var(--ink-light);font-style:normal}

/* === PROJECT GRID (2-col editorial) === */
.project-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.project-card{border-bottom:1px solid var(--line);padding-bottom:32px}
.project-card-img{aspect-ratio:16/10;overflow:hidden;border:1px solid var(--line);margin-bottom:20px;background:var(--paper-light)}
.project-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.project-card:hover .project-card-img img{transform:scale(1.03)}
.project-card .tag{font-family:var(--font-m);font-size:10px;text-transform:uppercase;letter-spacing:.15em;color:var(--brick);display:block;margin-bottom:4px}
.project-card h3{font-family:var(--font-h);font-weight:400;font-size:20px;line-height:1.3;margin-bottom:6px}
.project-card .arch{font-size:13px;color:var(--ink-light);font-style:italic}
.project-card p{font-size:14px;color:var(--ink-soft);line-height:1.8;margin-top:8px}

/* === SKETCHBOOK (3 image grid with polaroid) === */
.sketchbook-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.polaroid-card{background:var(--paper-light);border:1px solid var(--line);padding:12px 12px 40px;transform:rotate(-.5deg);transition:transform .4s}
.polaroid-card:nth-child(2){transform:rotate(1deg);margin-top:20px}
.polaroid-card:nth-child(3){transform:rotate(-1deg)}
.polaroid-card:hover{transform:rotate(0) scale(1.02)}
.polaroid-card img{width:100%;aspect-ratio:1;object-fit:cover;border:1px solid var(--line-light);background:var(--paper-light)}
.polaroid-card .caption{font-family:var(--font-m);font-size:11px;color:var(--ink-soft);margin-top:12px;text-align:center;font-style:italic}

/* === TIMELINE (vertical) === */
.timeline{position:relative;padding-left:40px;max-width:600px;margin:0 auto}
.timeline::before{content:'';position:absolute;left:16px;top:0;bottom:0;width:1px;background:var(--line)}
.timeline-item{position:relative;padding-bottom:40px}
.timeline-item:last-child{padding-bottom:0}
.timeline-item .dot{position:absolute;left:-32px;top:6px;width:10px;height:10px;border-radius:50%;background:var(--brick);border:2px solid var(--paper)}
.timeline-item .year{font-family:var(--font-m);font-size:12px;font-weight:600;color:var(--brick);letter-spacing:.1em;margin-bottom:4px}
.timeline-item h4{font-family:var(--font-h);font-weight:400;font-size:18px;color:var(--ink);margin-bottom:4px}
.timeline-item p{font-size:14px;color:var(--ink-soft);line-height:1.7}

/* === ARTICLE GRID (3-col for latest) === */
.art-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.art-card{border-bottom:1px solid var(--line);padding-bottom:24px}
.art-card .date{font-family:var(--font-m);font-size:10px;text-transform:uppercase;letter-spacing:.15em;color:var(--ink-light);display:block;margin-bottom:8px}
.art-card h4{font-family:var(--font-h);font-weight:400;font-size:17px;line-height:1.35;margin-bottom:6px}
.art-card p{font-size:13px;color:var(--ink-soft);line-height:1.7}
.art-card .more{display:inline-block;margin-top:10px;font-family:var(--font-m);font-size:10px;text-transform:uppercase;letter-spacing:.15em;color:var(--brick);border-bottom:1px solid transparent;transition:border-color var(--ease)}
.art-card .more:hover{border-bottom-color:var(--brick)}

/* === NEWSLETTER (vintage letterpress) === */
.vintage-letter{
  padding:100px 0;text-align:center;background:var(--paper-light);
  border-top:2px solid var(--line);border-bottom:2px solid var(--line);
}
.vintage-letter h2{font-family:var(--font-h);font-weight:400;font-size:clamp(24px,3vw,34px);color:var(--ink);margin-bottom:8px}
.vintage-letter p{font-size:14px;color:var(--ink-soft);margin-bottom:32px;font-style:italic}
.vintage-form{display:flex;gap:0;max-width:440px;margin:0 auto;border:1px solid var(--line);background:var(--paper)}
.vintage-form input{flex:1;border:none;background:transparent;padding:14px 18px;font-size:14px;font-family:var(--font);color:var(--ink);outline:none}
.vintage-form input::placeholder{color:var(--ink-light);font-style:italic}
.vintage-form button{border:none;background:var(--ink);color:var(--paper);padding:14px 28px;font-family:var(--font-m);font-size:11px;text-transform:uppercase;letter-spacing:.18em;cursor:pointer;transition:opacity var(--ease)}
.vintage-form button:hover{opacity:.85}
.vintage-links{display:flex;justify-content:center;gap:24px;margin-top:32px;flex-wrap:wrap}
.vintage-links a{font-family:var(--font-m);font-size:10px;text-transform:uppercase;letter-spacing:.15em;color:var(--ink-light);border-bottom:1px solid var(--line-light);padding-bottom:2px;transition:all var(--ease)}
.vintage-links a:hover{color:var(--brick);border-bottom-color:var(--brick)}

/* === FOOTER === */
.site-footer{padding:60px 0 40px;background:var(--paper);border-top:2px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:48px;padding-bottom:40px;border-bottom:1px solid var(--line)}
.footer-brand .site-logo{margin-bottom:12px;display:block}
.footer-brand p{font-size:13px;color:var(--ink-light);line-height:1.7;font-style:italic;max-width:300px}
.footer-col h5{font-family:var(--font-m);font-size:10px;font-weight:400;text-transform:uppercase;letter-spacing:.2em;margin-bottom:16px;color:var(--ink)}
.footer-col a{display:block;font-size:14px;color:var(--ink-soft);line-height:2.2;transition:color var(--ease)}
.footer-col a:hover{color:var(--brick)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:20px;font-size:12px;color:var(--ink-light);font-family:var(--font-m)}
.footer-contact{display:flex;gap:24px}

/* === ABOUT PAGE === */
.about-hero{
  padding:140px 24px 80px;margin-top:calc(-1 * var(--header-h));
  text-align:center;background:var(--paper-light);
}
.about-hero .label{margin-bottom:16px}
.about-hero h1{margin-bottom:12px}
.about-hero p{font-size:14px;color:var(--ink-soft);max-width:500px;margin:0 auto;line-height:1.8}
.about-story{padding:80px 0}
.about-story-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.about-story-text h2{margin-bottom:16px}
.about-story-text p{font-size:14px;color:var(--ink-soft);line-height:1.9;margin-bottom:16px}
.about-story-img{aspect-ratio:4/3;border:1px solid var(--line);background:var(--paper-light);display:flex;align-items:center;justify-content:center;overflow:hidden}
.about-story-img img{width:100%;height:100%;object-fit:cover}
.about-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);margin:60px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stat-item{background:var(--paper);padding:48px 24px;text-align:center}
.stat-item .num{font-family:var(--font-h);font-size:clamp(36px,4vw,48px);color:var(--brick);line-height:1;font-weight:400}
.stat-item .lbl{font-family:var(--font-m);font-size:11px;color:var(--ink-light);text-transform:uppercase;letter-spacing:.15em;margin-top:8px;display:block}
.about-mission{padding:80px 0;text-align:center}
.about-mission .container-narrow h2{margin-bottom:16px}
.about-mission p{font-size:15px;color:var(--ink-soft);line-height:1.9}
.about-team-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;margin-top:40px}
.team-member{text-align:center}
.team-member img{width:100%;aspect-ratio:1;object-fit:cover;border:1px solid var(--line);background:var(--paper-light);margin-bottom:16px}
.team-member h4{font-family:var(--font-h);font-size:16px;font-weight:400;margin-bottom:2px}
.team-member p{font-size:12px;color:var(--ink-light);font-family:var(--font-m);text-transform:uppercase;letter-spacing:.12em}

/* === APP PAGE === */
.app-hero{
  padding:140px 24px 80px;margin-top:calc(-1 * var(--header-h));background:var(--paper-light);
}
.app-hero .container{max-width:var(--container);margin:0 auto}
.app-hero h1{font-family:var(--font-h);font-weight:400;font-size:clamp(36px,5vw,52px);line-height:1.15;margin-bottom:12px}
.app-hero p{font-size:14px;color:var(--ink-soft);max-width:420px;line-height:1.8;margin-bottom:28px}
.app-grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.app-card{border-bottom:1px solid var(--line);padding-bottom:24px}
.app-card .icon{font-family:var(--font-m);font-size:12px;color:var(--brick);text-transform:uppercase;letter-spacing:.1em;display:block;margin-bottom:4px}
.app-card h4{font-family:var(--font-h);font-weight:400;font-size:17px;margin-bottom:6px}
.app-card p{font-size:13px;color:var(--ink-light);line-height:1.7}
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}
.step-box{text-align:center;padding:32px 20px;border:1px solid var(--line);background:var(--paper-light)}
.step-box .num{font-family:var(--font-h);font-size:40px;color:var(--gold);line-height:1;margin-bottom:8px}
.step-box h4{font-family:var(--font-h);font-weight:400;font-size:16px;margin-bottom:6px}
.step-box p{font-size:13px;color:var(--ink-light);line-height:1.7}
.platform-wrap{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
.platform-wrap span{padding:6px 16px;border:1px solid var(--line);font-family:var(--font-m);font-size:11px;color:var(--ink-soft)}

/* === LEGAL === */
.legal-page{padding:120px 0 80px;margin-top:calc(-1 * var(--header-h))}
.legal-page h1{font-family:var(--font-h);font-weight:400;font-size:clamp(28px,3.5vw,38px);color:var(--ink);margin-bottom:4px}
.legal-page .e-date{font-size:12px;color:var(--ink-light);margin-bottom:40px;font-style:italic}
.legal-page .toc{display:flex;flex-direction:column;gap:6px;margin-bottom:48px;padding:24px;border:1px solid var(--line);background:var(--paper-light)}
.legal-page .toc a{font-size:13px;color:var(--ink-soft);transition:color var(--ease)}
.legal-page .toc a:hover{color:var(--brick)}
.legal-page h2{font-family:var(--font-h);font-weight:400;font-size:20px;color:var(--ink);margin:36px 0 12px}
.legal-page h2:first-of-type{margin-top:0}
.legal-page p,.legal-page li{font-size:14px;color:var(--ink-soft);line-height:1.9;margin-bottom:10px}
.legal-page ul,.legal-page ol{padding-left:20px;margin-bottom:16px}
.legal-page li{margin-bottom:6px}

/* === NEWS LIST === */
.news-list-page{padding:120px 0 80px;margin-top:calc(-1 * var(--header-h))}
.news-list-page h1{font-family:var(--font-h);font-weight:400;font-size:clamp(28px,3.5vw,38px);margin-bottom:4px}
.news-list-page .subtitle{font-size:14px;color:var(--ink-light);margin-bottom:48px;font-style:italic}
.news-feature{display:grid;grid-template-columns:1fr 1fr;gap:0;margin-bottom:48px;border:1px solid var(--line);background:var(--paper-light)}
.news-feature-img{min-height:300px;overflow:hidden;background:var(--paper-light)}
.news-feature-img img{width:100%;height:100%;object-fit:cover}
.news-feature-body{padding:36px 32px;display:flex;flex-direction:column;justify-content:center}
.news-feature-body .date{font-family:var(--font-m);font-size:10px;text-transform:uppercase;letter-spacing:.15em;color:var(--ink-light);margin-bottom:8px}
.news-feature-body h2{font-family:var(--font-h);font-weight:400;font-size:clamp(20px,2.5vw,28px);line-height:1.3;margin-bottom:8px}
.news-feature-body p{font-size:13px;color:var(--ink-soft);line-height:1.8;margin-bottom:20px}
.news-list-remaining{display:flex;flex-direction:column;gap:0}
.news-list-item{display:grid;grid-template-columns:140px 1fr;gap:24px;padding:20px 0;border-bottom:1px solid var(--line-light);align-items:center;transition:background var(--ease)}
.news-list-item:hover{background:var(--paper-light)}
.news-list-item img{width:140px;height:100px;object-fit:cover;border:1px solid var(--line);background:var(--paper-light)}
.news-list-item-body .date{font-family:var(--font-m);font-size:10px;text-transform:uppercase;letter-spacing:.12em;color:var(--ink-light);display:block;margin-bottom:4px}
.news-list-item-body h4{font-family:var(--font-h);font-weight:400;font-size:16px;line-height:1.35;margin-bottom:4px}
.news-list-item-body p{font-size:12px;color:var(--ink-light);line-height:1.5;-webkit-line-clamp:2;-webkit-box-orient:vertical;display:-webkit-box;overflow:hidden}
.pagination{display:flex;justify-content:center;align-items:center;gap:6px;margin-top:48px}
.page-btn{display:inline-flex;align-items:center;justify-content:center;min-width:38px;height:38px;
  font-family:var(--font-m);font-size:13px;color:var(--ink-soft);border:1px solid var(--line);background:var(--paper);
  transition:all var(--ease)}
.page-btn:hover,.page-btn.active{border-color:var(--brick);color:var(--brick)}
.page-btn.active{background:var(--brick);color:var(--paper);border-color:var(--brick)}

/* === NEWS ARTICLE === */
.article-page{padding-top:60px;margin-top:calc(-1 * var(--header-h))}
.article-header{text-align:center;padding:100px 24px 40px;max-width:680px;margin:0 auto}
.article-header .date{font-family:var(--font-m);font-size:11px;text-transform:uppercase;letter-spacing:.15em;color:var(--ink-light);display:block;margin-bottom:12px}
.article-header h1{font-family:var(--font-h);font-weight:400;font-size:clamp(28px,4vw,42px);line-height:1.2;margin-bottom:16px}
.article-header p{font-size:14px;color:var(--ink-soft);line-height:1.8;max-width:560px;margin:0 auto;font-style:italic}
.article-hero-img{width:100%;max-height:480px;object-fit:cover;margin-bottom:48px;border:1px solid var(--line)}
.article-body{font-size:15px;line-height:2.1;color:var(--ink-soft);max-width:640px;margin:0 auto;padding:0 24px}
.article-body p{margin-bottom:20px}
.article-body h2{font-family:var(--font-h);font-weight:400;font-size:22px;color:var(--ink);margin:36px 0 12px}
.article-body h3{font-family:var(--font-h);font-weight:400;font-size:17px;color:var(--ink);margin:28px 0 8px}
.article-body ul,.article-body ol{padding-left:20px;margin-bottom:20px}
.article-body li{margin-bottom:8px}
.article-footer{text-align:center;padding:60px 24px}
.article-footer a{font-family:var(--font-m);font-size:11px;text-transform:uppercase;letter-spacing:.15em;color:var(--ink-soft);border:1px solid var(--line);padding:10px 24px;transition:all var(--ease)}
.article-footer a:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.article-body p:first-child:first-letter{
  font-size:3.5em;float:left;line-height:1;padding-right:10px;padding-top:6px;
  font-weight:400;color:var(--brick);font-family:var(--font-h);
}

/* === RESPONSIVE === */
@media(max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:40px;padding:60px 0}
  .hero-image{aspect-ratio:16/10;max-height:400px}
  .project-grid{grid-template-columns:1fr;gap:32px}
  .about-story-grid{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .news-feature{grid-template-columns:1fr}
  .news-feature-img{min-height:220px}
}
@media(max-width:768px){
  .section{padding:64px 0}
  .nav-list{display:none;position:fixed;top:var(--header-h);left:0;right:0;
    background:var(--paper);flex-direction:column;padding:24px;gap:20px;
    border-bottom:2px solid var(--line)}
  .nav-list.open{display:flex}
  .nav-toggle{display:flex}
  .sketchbook-grid{grid-template-columns:1fr;max-width:400px;margin:0 auto}
  .polaroid-card:nth-child(2){margin-top:0}
  .art-grid{grid-template-columns:1fr;gap:24px}
  .app-grid-3{grid-template-columns:1fr;gap:24px}
  .steps-grid{grid-template-columns:1fr;gap:24px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;gap:8px;text-align:center}
  .about-stats{grid-template-columns:1fr}
  .about-team-grid{grid-template-columns:1fr;max-width:320px;margin:40px auto 0}
  .news-list-item{grid-template-columns:100px 1fr;gap:16px}
  .news-list-item img{width:100px;height:80px}
}
@media(max-width:480px){
  .container{padding:0 16px}
  .site-header{padding:0 16px}
  .about-hero,.app-hero{padding:120px 16px 60px}
  .article-header{padding:80px 16px 24px}
  .article-header h1{font-size:24px}
  .hero-text{padding:0}
  .vintage-letter{padding:64px 0}
  .vintage-form{flex-direction:column}
  .vintage-form button{width:100%}
}