/* Shared styles for the personal brand site (static HTML). */
:root{
  --color-primary:#2C3E50;
  --color-accent:#E67E22;
  --color-bg:#F9F9F9;
  --color-card:#FFFFFF;
  --color-text:#333333;
  --color-muted:#777777;
  --color-border:#EEEEEE;
  --radius-card:12px;
  --radius-pill:30px;
  --radius-img:8px;
  --shadow-soft:0 2px 8px rgba(0,0,0,0.04);
  --container:1200px;
  --gutter-desktop:20px;
  --gutter-mobile:16px;
  --transition:ease-out 0.2s;
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, "Noto Sans", "Liberation Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    sans-serif;
  background:var(--color-bg);
  color:var(--color-text);
  line-height:1.6;
}

a{ color:inherit; text-decoration:none; }
img{ max-width:100%; display:block; }

.container{
  max-width:var(--container);
  margin:0 auto;
  padding:0 var(--gutter-desktop);
}
@media (max-width: 640px){
  .container{ padding:0 var(--gutter-mobile); }
  body{ font-size:14px; }
}

/* Motion */
.fade-in{
  opacity:0;
  transform:translateY(6px);
  transition:opacity 0.3s ease-out, transform 0.3s ease-out;
}
.fade-in.is-visible{
  opacity:1;
  transform:translateY(0);
}

/* Header / Nav */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:#fff;
  box-shadow: 0 2px 14px rgba(0,0,0,0.04);
}
.nav-inner{
  height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  min-width:180px;
}
.brand-mark{
  width:36px;
  height:36px;
  border-radius:10px;
  background:linear-gradient(135deg, var(--color-primary), #1f2d3a);
  box-shadow:0 6px 22px rgba(44,62,80,0.18);
}
.brand-title{
  display:flex;
  flex-direction:column;
  line-height:1.2;
}
.brand-title strong{
  font-weight:500;
  letter-spacing:0.2px;
}
.brand-title span{
  font-size:12px;
  color:var(--color-muted);
}

.nav-links{
  display:flex;
  align-items:center;
  gap:18px;
}
.nav-links a{
  color:var(--color-primary);
  font-weight:500;
  padding:10px 12px;
  border-radius:12px;
  transition: background var(--transition), transform var(--transition);
}
.nav-links a:hover{
  background:rgba(230,126,34,0.10);
  color:var(--color-accent);
}

.nav-cta{
  display:flex;
  align-items:center;
  gap:12px;
}

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:12px 28px;
  border-radius:var(--radius-pill);
  background:var(--color-primary);
  color:#fff;
  border:0;
  cursor:pointer;
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
  font-weight:500;
  min-height:44px;
}
.btn:hover{
  background:var(--color-accent);
  transform:scale(1.02);
  box-shadow: 0 10px 28px rgba(230,126,34,0.18);
}
.btn:active{ transform:scale(1.0); }

.btn-secondary{
  background:transparent;
  color:var(--color-primary);
  border:1px solid var(--color-primary);
  transition: background var(--transition), transform var(--transition), border-color var(--transition);
}
.btn-secondary:hover{
  background:rgba(44,62,80,0.06);
  transform:scale(1.02);
}

.btn-ghost{
  background:transparent;
  color:var(--color-primary);
  border:0;
  padding:10px 14px;
  border-radius:14px;
  cursor:pointer;
  transition: background var(--transition), transform var(--transition);
  min-height:44px;
}
.btn-ghost:hover{
  background:rgba(44,62,80,0.06);
  transform:scale(1.01);
}

.btn-full{
  width:100%;
}

.icon{
  width:18px;
  height:18px;
  flex:0 0 auto;
}

/* Mobile menu */
.burger{
  display:none;
  min-height:44px;
  width:44px;
  align-items:center;
  justify-content:center;
  border-radius:14px;
  border:1px solid var(--color-border);
  background:#fff;
  cursor:pointer;
}
.burger:hover{ background:rgba(44,62,80,0.04); }
.drawer-backdrop{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,0.20);
  z-index:80;
  opacity:0;
  pointer-events:none;
  transition: opacity var(--transition);
}
.drawer-backdrop.is-open{
  opacity:1;
  pointer-events:auto;
}
.drawer{
  position:fixed;
  top:0; right:0;
  height:100%;
  width:min(320px, 88vw);
  background:#fff;
  z-index:90;
  transform: translateX(105%);
  transition: transform 0.3s ease-out;
  box-shadow: -10px 0 30px rgba(0,0,0,0.12);
  padding:16px;
  display:flex;
  flex-direction:column;
  gap:14px;
}
.drawer.is-open{ transform:translateX(0); }
.drawer .drawer-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
}
.drawer-links{
  display:flex;
  flex-direction:column;
  gap:6px;
}
.drawer-links a{
  padding:12px 12px;
  border-radius:14px;
  color:var(--color-primary);
  font-weight:500;
}
.drawer-links a:hover{
  background:rgba(230,126,34,0.10);
  color:var(--color-accent);
}

@media (max-width: 860px){
  .nav-links{ display:none; }
  .nav-cta{ display:none; }
  .burger{ display:flex; }
}

/* Page sections */
.section{
  padding:80px 0;
}
@media (max-width: 640px){
  .section{ padding:48px 0; }
}

.section-title{
  font-size:24px;
  font-weight:500;
  letter-spacing:0.2px;
  margin:0 0 14px;
}
.section-sub{
  color:var(--color-muted);
  margin:0 0 26px;
}

.grid-3{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:18px;
}
@media (max-width: 980px){
  .grid-3{ grid-template-columns: 1fr; }
}

.grid-2{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap:18px;
}
@media (max-width: 980px){
  .grid-2{ grid-template-columns: 1fr; }
}

/* Hero */
.hero{
  padding:56px 0 12px;
}
.hero-wrap{
  display:grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap:26px;
  align-items:center;
}
@media (max-width: 980px){
  .hero-wrap{ grid-template-columns: 1fr; }
}
.hero-media{
  border-radius: var(--radius-card);
  overflow:hidden;
  background:
    radial-gradient(1200px 300px at 20% 0%, rgba(230,126,34,0.18), transparent 60%),
    radial-gradient(700px 220px at 80% 40%, rgba(44,62,80,0.22), transparent 60%),
    linear-gradient(135deg, #ffffff, #f1f5f9);
  border:1px solid var(--color-border);
  min-height:320px;
  position:relative;
  box-shadow: var(--shadow-soft);
}
.hero-media .hero-media-inner{
  position:absolute;
  inset:0;
  padding:22px;
  display:flex;
  align-items:flex-end;
  justify-content:flex-start;
}
.hero-media .hero-badge{
  background:rgba(255,255,255,0.86);
  border:1px solid rgba(238,238,238,0.9);
  border-radius:16px;
  padding:12px 14px;
  backdrop-filter: blur(6px);
}
.hero-kicker{
  color:var(--color-muted);
  font-weight:500;
  letter-spacing:0.2px;
}
.hero h1{
  margin:12px 0 10px;
  font-size:32px;
  font-weight:500;
  line-height:1.2;
}
.hero p{
  margin:0 0 24px;
  color:var(--color-muted);
  max-width:56ch;
}
.hero-actions{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
}

/* Cards */
.card{
  background:var(--color-card);
  border:1px solid var(--color-border);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-soft);
}
.card-pad{ padding:24px; }
.divider{
  height:1px;
  background:var(--color-border);
  width:100%;
  margin:18px 0;
}

/* Input / Form */
.field{
  display:flex;
  flex-direction:column;
  gap:8px;
}
.label{
  color:var(--color-muted);
  font-weight:500;
  font-size:13px;
}
.input, .select, .textarea{
  width:100%;
  min-height:44px;
  border-radius:8px;
  border:1px solid var(--color-border);
  padding:12px 14px;
  background:#fff;
  color:var(--color-text);
  outline:none;
  transition:border-color var(--transition), box-shadow var(--transition);
  font-family:inherit;
  font-size:14px;
}
.textarea{
  min-height:120px;
  resize:vertical;
}
.input:focus, .select:focus, .textarea:focus{
  border-color:var(--color-primary);
  box-shadow: 0 0 0 4px rgba(44,62,80,0.08);
}
.help{
  color:var(--color-muted);
  font-size:13px;
  margin-top:6px;
}
.honeypot{
  position:absolute;
  left:-9999px;
  top:auto;
  width:1px;
  height:1px;
  overflow:hidden;
}

/* Portfolio */
.filter-row{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin:18px 0 22px;
}
.chip{
  padding:10px 16px;
  border-radius:999px;
  border:1px solid var(--color-border);
  background:#fff;
  color:var(--color-primary);
  font-weight:500;
  cursor:pointer;
  min-height:44px;
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}
.chip:hover{
  background:rgba(230,126,34,0.08);
  border-color:rgba(230,126,34,0.45);
  transform:scale(1.02);
}
.chip.is-active{
  border-color:var(--color-accent);
  background:rgba(230,126,34,0.10);
  color:var(--color-accent);
}

.port-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:18px;
}
@media (max-width: 980px){
  .port-grid{ grid-template-columns: 1fr; }
}
.port-card{
  overflow:hidden;
  position:relative;
}
.port-thumb{
  aspect-ratio: 16 / 9;
  background:
    radial-gradient(400px 160px at 20% 0%, rgba(230,126,34,0.18), transparent 55%),
    radial-gradient(480px 180px at 80% 70%, rgba(44,62,80,0.20), transparent 60%),
    linear-gradient(135deg, #fff, #f2f6fb);
  border-bottom:1px solid var(--color-border);
  position:relative;
}
.port-thumb svg{
  width:100%;
  height:100%;
}
.port-overlay{
  position:absolute;
  inset:0;
  background: rgba(0,0,0,0.40);
  opacity:0;
  display:flex;
  align-items:center;
  justify-content:center;
  transition: opacity 0.2s ease-out;
}
.port-card:hover .port-overlay{
  opacity:1;
}
.port-body{
  padding:16px 18px 18px;
}
.port-title{
  font-size:18px;
  font-weight:500;
  margin:0 0 8px;
  line-height:1.3;
}
.port-meta{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  color:var(--color-muted);
  font-weight:500;
  font-size:13px;
}
.metric{
  color:var(--color-accent);
  font-weight:600;
}

/* About */
.about-photo{
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-card);
  overflow:hidden;
  background:
    radial-gradient(700px 260px at 20% 0%, rgba(230,126,34,0.22), transparent 60%),
    radial-gradient(600px 240px at 80% 70%, rgba(44,62,80,0.20), transparent 60%),
    linear-gradient(135deg, #ffffff, #f1f5f9);
  border:1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  display:flex;
  align-items:flex-end;
  justify-content:flex-start;
  padding:18px;
}
.about-photo .photo-caption{
  background:rgba(255,255,255,0.86);
  border:1px solid rgba(238,238,238,0.9);
  padding:10px 12px;
  border-radius:14px;
  backdrop-filter: blur(6px);
  color:var(--color-muted);
  font-weight:500;
}

.skill-row{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.skill-tag{
  padding:10px 14px;
  background:#fff;
  border:1px solid var(--color-border);
  border-radius:999px;
  color:var(--color-primary);
  font-weight:500;
  display:flex;
  align-items:center;
  gap:10px;
}
.skill-bar{
  height:10px;
  border-radius:999px;
  background:rgba(44,62,80,0.10);
  overflow:hidden;
  flex:1;
  min-width:120px;
}
.skill-bar > span{
  display:block;
  height:100%;
  background:linear-gradient(90deg, var(--color-primary), var(--color-accent));
}

/* Blog */
.toolbar{
  display:flex;
  gap:12px;
  align-items:center;
  flex-wrap:wrap;
}
.search{
  flex:1;
  min-width:220px;
}
.tag-cloud{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:18px;
}
.tag{
  border-radius:999px;
  border:1px solid var(--color-border);
  background:#fff;
  padding:10px 14px;
  cursor:pointer;
  font-weight:500;
  color:var(--color-primary);
  transition: transform var(--transition), background var(--transition), border-color var(--transition);
  min-height:44px;
}
.tag:hover{
  background:rgba(230,126,34,0.08);
  border-color:rgba(230,126,34,0.45);
  transform:scale(1.02);
}
.tag.is-active{
  border-color:var(--color-accent);
  background:rgba(230,126,34,0.10);
  color:var(--color-accent);
}
.post-list{
  display:grid;
  grid-template-columns: 1fr;
  gap:14px;
}
.post-card{
  padding:18px 18px;
  display:flex;
  gap:16px;
  align-items:flex-start;
}
.post-date{
  color:var(--color-muted);
  font-weight:600;
  min-width:110px;
}
.post-title{
  margin:0;
  font-size:18px;
  font-weight:500;
}
.post-excerpt{
  margin:8px 0 10px;
  color:var(--color-muted);
}
.post-actions{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
}
.badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  border-radius:999px;
  background:rgba(44,62,80,0.06);
  border:1px solid rgba(44,62,80,0.12);
  color:var(--color-primary);
  font-weight:600;
  font-size:13px;
}
.ad-badge{
  background:rgba(230,126,34,0.10);
  border-color:rgba(230,126,34,0.25);
  color:var(--color-accent);
}

/* Post page */
.article{
  max-width:820px;
}
.article h1{
  font-size:32px;
  font-weight:500;
  line-height:1.2;
  margin:10px 0 14px;
}
.article .meta{
  color:var(--color-muted);
  font-weight:600;
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-bottom:20px;
}
.article .content p{
  margin:0 0 18px;
}
.article .content blockquote{
  border-left:4px solid var(--color-accent);
  background:rgba(238,238,238,0.35);
  padding:14px 16px;
  margin:18px 0;
  font-style:italic;
  color:#3a3a3a;
  border-radius:10px;
}
.article .content table{
  width:100%;
  border-collapse:collapse;
  margin:18px 0;
}
.article .content th, .article .content td{
  border:1px solid var(--color-border);
  padding:12px 12px;
  vertical-align:top;
}
.article .content th{
  background:rgba(44,62,80,0.06);
  text-align:left;
}
.article .content .tool-row a{
  color:var(--color-accent);
  font-weight:600;
}

/* Footer */
.footer{
  padding:44px 0;
  background:#fff;
  border-top:1px solid var(--color-border);
}
.footer-inner{
  display:flex;
  justify-content:space-between;
  gap:22px;
  flex-wrap:wrap;
}
.social-row{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
}
.social-link{
  width:44px;
  height:44px;
  border-radius:14px;
  border:1px solid var(--color-border);
  display:flex;
  align-items:center;
  justify-content:center;
  background:#fff;
  transition: transform var(--transition), background var(--transition), border-color var(--transition);
}
.social-link:hover{
  background:rgba(230,126,34,0.10);
  border-color:rgba(230,126,34,0.45);
  transform:scale(1.02);
}
.footer p{
  margin:0;
  color:var(--color-muted);
  font-weight:500;
}

/* Toast */
.toast{
  position:fixed;
  left:50%;
  bottom:24px;
  transform:translateX(-50%);
  background:#111;
  color:#fff;
  padding:12px 14px;
  border-radius:14px;
  z-index:120;
  opacity:0;
  pointer-events:none;
  transition: opacity 0.2s ease-out, transform 0.2s ease-out;
}
.toast.is-show{
  opacity:1;
  transform:translateX(-50%) translateY(-6px);
}

/* Modal-ish utilities */
.wechat-wrap{
  display:flex;
  flex-direction:column;
  gap:12px;
}
.qr-area{
  display:none;
  border-radius: var(--radius-card);
  padding:18px;
  background:#fff;
  border:1px solid var(--color-border);
  box-shadow:var(--shadow-soft);
}
.qr-area.is-open{ display:block; }
.qr-placeholder{
  width:220px;
  max-width:100%;
  margin:0 auto;
  border-radius:16px;
  border:1px solid var(--color-border);
  padding:10px;
  background:linear-gradient(135deg, #fff, #f6f9fc);
}

/* Small helpers */
.row{
  display:flex;
  gap:18px;
  align-items:center;
}
.muted{ color:var(--color-muted); }
.sr-only{
  position:absolute;
  width:1px; height:1px;
  padding:0; margin:-1px;
  overflow:hidden;
  clip:rect(0,0,0,0);
  white-space:nowrap; border:0;
}