/* ============================================================
 * 연세대학교 예술원 · Yonsei of Arts —— 中国官方授权站点
 * 共享样式表：色板 / 字体 / 纸纹 / 导航 / 排版 / 组件 / 表单
 * 设计语言：韩纸质感 + 延世海蓝 + 五方色点缀，博物馆级排版
 * ============================================================ */

:root{
  --ink:#14161c;
  --ink-soft:#2c2e36;
  --paper:#f6f4ef;
  --paper-2:#ecebe4;
  --paper-3:#e3e0d4;
  --navy:#1b3a5b;        /* 연세 네이비 */
  --navy-2:#264c75;
  --accent:#0a5b52;      /* 청자색 celadon */
  --signal:#c3422b;      /* 오방색 赤 */
  --gold:#c9a54b;        /* 오방색 黄 */
  --muted:#8a8578;
  --muted-2:#a8a397;
  --line:rgba(20,22,28,.18);
  --line-soft:rgba(20,22,28,.10);
  --shadow-sm:0 4px 12px -6px rgba(20,22,28,.18);
  --shadow-md:0 14px 36px -22px rgba(27,58,91,.45);

  --font-sans: "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic",
               "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
               -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-serif: "Noto Serif KR", "Nanum Myeongjo",
                "Source Han Serif SC", "Source Han Serif CN",
                "Songti SC", STSong, SimSun, serif;
  --font-italic: "Cormorant Garamond", "EB Garamond",
                 Georgia, "Times New Roman", "Nanum Myeongjo", serif;

  --radius-sm:2px;
  --radius-md:4px;

  --maxw:1200px;
  --maxw-narrow:880px;
}

*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-sans);
  color:var(--ink);
  background:var(--paper);
  min-height:100vh;
  min-height:100dvh;
  overflow-x:hidden;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  -webkit-tap-highlight-color:transparent;
}
a{color:inherit;text-decoration:none;transition:color .2s}
a:hover{color:var(--navy)}
img{max-width:100%;display:block}

/* 종이 질감 全站底纹 */
body::before{
  content:"";
  position:fixed;inset:0;
  background-image:radial-gradient(rgba(20,22,28,.03) 1px, transparent 1.2px);
  background-size:4px 4px;
  pointer-events:none;
  mix-blend-mode:multiply;
  z-index:1;
}

/* ============================================================
 * 容器 / 排版基线
 * ============================================================ */
.container{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 max(6vw, env(safe-area-inset-left)) 0 max(6vw, env(safe-area-inset-right));
  position:relative;
  z-index:2;
}
.container.narrow{max-width:var(--maxw-narrow)}

.eyebrow{
  display:inline-flex;align-items:center;gap:14px;
  font-size:11px;letter-spacing:.4em;
  color:var(--signal);
  text-transform:uppercase;
  font-weight:500;
}
.eyebrow .line{height:1px;width:40px;background:var(--signal);opacity:.7}

.section-title{
  font-family:var(--font-serif);
  font-weight:400;
  font-size:clamp(28px,3.6vw,46px);
  line-height:1.2;
  letter-spacing:-.005em;
  color:var(--ink);
  margin-top:18px;
}
.section-title .en{
  display:block;
  font-family:var(--font-italic);
  font-style:italic;
  font-weight:300;
  font-size:clamp(14px,1.4vw,18px);
  letter-spacing:.18em;
  color:var(--muted);
  margin-top:10px;
  text-transform:uppercase;
}
.section-title .cn-sub{
  display:block;
  font-family:var(--font-serif);
  font-weight:600;
  font-size:clamp(20px,2.2vw,26px);
  letter-spacing:.02em;
  color:var(--navy);
  margin-top:14px;
}

.rule{
  width:72px;height:1px;
  background:var(--ink);opacity:.55;
  margin:28px 0;
}
.rule.center{margin-left:auto;margin-right:auto}

.lead{
  max-width:640px;
  font-family:var(--font-serif);
  font-weight:300;
  font-size:clamp(15px,1.05vw,17px);
  line-height:1.95;
  color:var(--ink-soft);
}
.lead .ko{
  display:block;
  font-family:var(--font-sans);
  font-weight:300;
  font-size:clamp(13px,.95vw,15px);
  color:var(--muted);
  margin-top:14px;
  letter-spacing:.02em;
  line-height:1.85;
}

.kicker{
  font-size:11px;letter-spacing:.32em;
  text-transform:uppercase;
  color:var(--muted);
  font-weight:500;
}

/* ============================================================
 * 顶部导航
 * ============================================================ */
.site-header{
  position:sticky;top:0;
  background:rgba(246,244,239,.92);
  backdrop-filter:saturate(140%) blur(10px);
  -webkit-backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid var(--line-soft);
  z-index:50;
}
.site-header .bar{
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 0;gap:24px;
}
.brand{display:flex;align-items:center;gap:14px}
.brand-emblem{
  position:relative;
  display:inline-flex;align-items:center;justify-content:center;
  padding:8px 18px;
  background:var(--navy);color:#fff;
  border-radius:50%/60%;
  box-shadow:0 10px 22px -14px rgba(27,58,91,.55),
             inset 0 0 0 1px rgba(255,255,255,.08);
}
.brand-emblem::before{
  content:"";position:absolute;inset:-5px;
  border:.6px solid rgba(27,58,91,.32);
  border-radius:50%/60%;
  pointer-events:none;
}
.brand-emblem .ko{
  font-family:var(--font-serif);
  font-size:13px;letter-spacing:.18em;
  font-weight:500;
}
.brand-divider{width:1px;height:22px;background:var(--line)}
.brand-text{
  font-family:var(--font-serif);
  font-weight:500;font-size:13px;letter-spacing:.22em;
  color:var(--ink);
}
.brand-text .cn{display:block;font-size:11px;color:var(--muted);letter-spacing:.18em;margin-top:2px}

.nav-main{display:flex;align-items:center;gap:30px}
.nav-main a{
  font-size:12px;letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--ink-soft);
  font-weight:500;
  position:relative;
  padding:6px 0;
}
.nav-main a:hover{color:var(--navy)}
.nav-main a.active{color:var(--navy)}
.nav-main a.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;
  height:1px;background:var(--navy);
}
.nav-main .cta{
  padding:10px 18px;
  background:var(--navy);color:#fff;
  border-radius:50%/60%;
  letter-spacing:.18em;
}
.nav-main .cta:hover{color:#fff;background:var(--navy-2)}

.nav-toggle{
  display:none;
  width:40px;height:40px;
  border:1px solid var(--line);
  background:transparent;
  cursor:pointer;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  display:block;position:relative;
  width:18px;height:1px;background:var(--ink);
  margin:0 auto;transition:.25s;
}
.nav-toggle span::before{content:"";position:absolute;top:-6px;left:0}
.nav-toggle span::after{content:"";position:absolute;top:6px;left:0}
.nav-toggle.open span{background:transparent}
.nav-toggle.open span::before{transform:rotate(45deg);top:0}
.nav-toggle.open span::after{transform:rotate(-45deg);top:0}

@media (max-width:1024px){
  .nav-main{
    position:fixed;top:78px;right:0;
    width:min(86vw,360px);height:calc(100vh - 78px);
    background:var(--paper);
    border-left:1px solid var(--line);
    flex-direction:column;align-items:flex-start;gap:0;
    padding:30px 32px;
    transform:translateX(100%);transition:transform .3s ease;
    overflow-y:auto;
  }
  .nav-main.open{transform:translateX(0)}
  .nav-main a{
    width:100%;padding:18px 0;
    border-bottom:1px solid var(--line-soft);
    letter-spacing:.18em;
  }
  .nav-main .cta{
    margin-top:24px;width:100%;text-align:center;border-radius:50%/60%;
  }
  .nav-toggle{display:flex;align-items:center;justify-content:center}
}

/* ============================================================
 * 通用区段 / 卡片 / 按钮
 * ============================================================ */
.section{
  padding:clamp(60px,8vw,120px) 0;
  position:relative;z-index:2;
}
.section.tight{padding:clamp(40px,5vw,80px) 0}
.section.dark{
  background:var(--ink);
  color:var(--paper);
}
.section.dark .section-title,.section.dark .lead{color:var(--paper)}
.section.dark .lead{color:rgba(246,244,239,.75)}
.section.dark .rule{background:var(--paper);opacity:.4}
.section.cream{background:var(--paper-2)}

.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:32px;
  margin-bottom:48px;
}
.section-head .right{font-size:12px;letter-spacing:.22em;color:var(--muted);text-transform:uppercase}

@media (max-width:720px){
  .section-head{flex-direction:column;align-items:flex-start;gap:18px;margin-bottom:32px}
}

.grid-3{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.grid-2{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.grid-4{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
}
@media (max-width:980px){
  .grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:640px){
  .grid-3,.grid-2,.grid-4{grid-template-columns:1fr;gap:18px}
}

.card{
  background:#fff;
  border:1px solid var(--line);
  padding:28px 26px;
  position:relative;
  transition:transform .25s, box-shadow .25s, border-color .25s;
}
.card::before{
  content:"";position:absolute;inset:6px;
  border:1px solid transparent;pointer-events:none;
  transition:border-color .25s;
}
.card:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-md);
  border-color:var(--navy);
}
.card:hover::before{border-color:var(--line-soft)}
.card .num{
  font-family:var(--font-italic);font-style:italic;
  font-size:13px;letter-spacing:.2em;color:var(--signal);
  text-transform:uppercase;
}
.card h3{
  font-family:var(--font-serif);
  font-weight:500;
  font-size:22px;line-height:1.35;
  margin-top:14px;margin-bottom:14px;
  color:var(--ink);
}
.card h3 .ko{
  display:block;font-size:13px;color:var(--muted);
  letter-spacing:.1em;margin-top:6px;
}
.card p{
  font-family:var(--font-serif);
  font-weight:300;font-size:14.5px;line-height:1.85;
  color:var(--ink-soft);
}
.card .arrow{
  display:inline-flex;align-items:center;gap:6px;
  margin-top:18px;
  font-size:11px;letter-spacing:.3em;text-transform:uppercase;
  color:var(--navy);font-weight:500;
}
.card .arrow::after{content:"→";font-style:italic;transition:transform .2s}
.card:hover .arrow::after{transform:translateX(4px)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:14px 28px;
  font-family:var(--font-sans);font-weight:500;
  font-size:13px;letter-spacing:.22em;text-transform:uppercase;
  background:var(--navy);color:#fff;
  border:1px solid var(--navy);
  border-radius:50%/60%;
  cursor:pointer;
  transition:background .2s, color .2s, transform .15s;
}
.btn:hover{background:var(--navy-2);color:#fff;transform:translateY(-1px)}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn.ghost:hover{background:var(--ink);color:var(--paper)}
.btn.signal{background:var(--signal);border-color:var(--signal)}
.btn.signal:hover{background:#a8371f;color:#fff}
.btn.lg{padding:18px 36px;font-size:14px}
.btn .ico{font-style:italic;font-family:var(--font-italic)}

.button-row{display:flex;gap:16px;flex-wrap:wrap;margin-top:34px}

/* ============================================================
 * 页面级 hero（内容页通用）
 * ============================================================ */
.page-hero{
  padding:clamp(56px,9vh,120px) 0 clamp(40px,6vh,80px);
  border-bottom:1px solid var(--line-soft);
}
.page-hero .crumbs{
  font-size:11px;letter-spacing:.32em;text-transform:uppercase;
  color:var(--muted);font-weight:500;
  margin-bottom:18px;
}
.page-hero .crumbs a{color:var(--muted)}
.page-hero .crumbs a:hover{color:var(--navy)}
.page-hero .crumbs span{margin:0 10px;color:var(--line)}

/* ============================================================
 * 通用底栏
 * ============================================================ */
.site-footer{
  background:var(--ink);
  color:rgba(246,244,239,.78);
  padding:64px 0 40px;
  position:relative;z-index:2;
  margin-top:60px;
}
.site-footer .grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:48px;
  border-bottom:1px solid rgba(246,244,239,.12);
}
@media (max-width:880px){
  .site-footer .grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:520px){
  .site-footer .grid{grid-template-columns:1fr}
}
.site-footer h4{
  font-family:var(--font-serif);
  font-weight:500;font-size:14px;letter-spacing:.18em;
  color:var(--paper);
  margin-bottom:18px;
  text-transform:uppercase;
}
.site-footer ul{list-style:none}
.site-footer li{margin-bottom:10px;font-size:13px;line-height:1.6}
.site-footer a{color:rgba(246,244,239,.72)}
.site-footer a:hover{color:var(--paper)}
.site-footer .blurb{
  font-family:var(--font-serif);font-weight:300;
  font-size:14px;line-height:1.85;
  color:rgba(246,244,239,.7);
  max-width:340px;
}
.site-footer .blurb .emblem{
  display:inline-block;
  padding:6px 14px;
  border:1px solid rgba(246,244,239,.3);
  border-radius:50%/60%;
  font-size:11px;letter-spacing:.28em;
  margin-bottom:14px;
  color:var(--paper);
}
.site-footer .legal{
  display:flex;justify-content:space-between;align-items:center;gap:20px;
  padding-top:30px;
  font-size:11px;letter-spacing:.22em;color:rgba(246,244,239,.5);
  text-transform:uppercase;
}
.site-footer .legal a{color:rgba(246,244,239,.55)}
@media (max-width:720px){
  .site-footer .legal{flex-direction:column;align-items:flex-start;gap:10px}
}

/* 授权角标（顶栏 / 底栏复用） */
.auth-badge{
  display:inline-flex;align-items:center;gap:10px;
  padding:6px 12px;
  border:1px solid var(--signal);
  font-size:10.5px;letter-spacing:.28em;text-transform:uppercase;
  color:var(--signal);font-weight:500;
}
.auth-badge::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--signal);
  box-shadow:0 0 0 0 rgba(195,66,43,.5);
  animation:pulse 1.8s infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(195,66,43,.55)}
  70%{box-shadow:0 0 0 10px rgba(195,66,43,0)}
  100%{box-shadow:0 0 0 0 rgba(195,66,43,0)}
}

/* ============================================================
 * 文章型排版（about / authorization / etc.）
 * ============================================================ */
.article{
  font-family:var(--font-serif);
  font-weight:300;
  font-size:17px;line-height:2;
  color:var(--ink-soft);
}
.article h2{
  font-family:var(--font-serif);font-weight:500;
  font-size:28px;line-height:1.35;color:var(--ink);
  margin:60px 0 22px;letter-spacing:-.005em;
}
.article h2::before{
  content:"";display:block;width:48px;height:1px;background:var(--signal);
  margin-bottom:18px;
}
.article h3{
  font-family:var(--font-serif);font-weight:500;
  font-size:20px;color:var(--navy);margin:36px 0 14px;
}
.article p{margin-bottom:20px;max-width:680px}
.article p strong{color:var(--navy);font-weight:500}
.article ul{margin:18px 0 24px 22px}
.article li{margin-bottom:10px}
.article blockquote{
  border-left:2px solid var(--signal);
  padding:6px 0 6px 22px;margin:28px 0;
  font-style:italic;color:var(--ink);
  font-size:18px;line-height:1.85;
}
.article .meta-line{
  display:flex;flex-wrap:wrap;gap:30px;
  font-family:var(--font-sans);font-weight:500;
  font-size:11px;letter-spacing:.3em;text-transform:uppercase;
  color:var(--muted);
  padding:18px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  margin:28px 0 40px;
}
.article .meta-line span strong{color:var(--ink);margin-right:6px}

/* ============================================================
 * 时间线（admissions / about-history）
 * ============================================================ */
.timeline{
  position:relative;padding:20px 0;
}
.timeline::before{
  content:"";position:absolute;
  left:14px;top:0;bottom:0;width:1px;
  background:var(--line);
}
.timeline-item{
  position:relative;padding:0 0 36px 50px;
}
.timeline-item::before{
  content:"";position:absolute;left:8px;top:8px;
  width:13px;height:13px;border-radius:50%;
  background:var(--paper);border:1.5px solid var(--navy);
  box-shadow:0 0 0 4px var(--paper);
}
.timeline-item.signal::before{border-color:var(--signal);background:var(--signal)}
.timeline-item .date{
  font-family:var(--font-italic);font-style:italic;
  font-size:14px;letter-spacing:.18em;color:var(--signal);
  text-transform:uppercase;
}
.timeline-item h4{
  font-family:var(--font-serif);font-weight:500;
  font-size:20px;color:var(--ink);margin:6px 0 10px;
}
.timeline-item p{
  font-family:var(--font-serif);font-weight:300;
  font-size:15px;line-height:1.85;color:var(--ink-soft);
}

/* ============================================================
 * 表单
 * ============================================================ */
.form-shell{
  background:#fff;
  border:1px solid var(--line);
  padding:clamp(28px,5vw,56px);
  position:relative;
}
.form-shell::before{
  content:"";position:absolute;inset:8px;
  border:1px solid var(--line-soft);
  pointer-events:none;
}

.steps{
  display:flex;align-items:center;gap:6px;flex-wrap:wrap;
  margin-bottom:36px;
}
.steps .step{
  display:flex;align-items:center;gap:10px;
  font-size:11px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--muted);font-weight:500;
}
.steps .step .num{
  display:inline-flex;align-items:center;justify-content:center;
  width:26px;height:26px;border:1px solid var(--line);
  font-family:var(--font-italic);font-style:italic;
  background:var(--paper);
}
.steps .step.active{color:var(--navy)}
.steps .step.active .num{background:var(--navy);color:#fff;border-color:var(--navy)}
.steps .step.done{color:var(--accent)}
.steps .step.done .num{background:var(--accent);color:#fff;border-color:var(--accent)}
.steps .sep{flex:1;height:1px;background:var(--line);min-width:14px;max-width:40px}

.form-step{display:none}
.form-step.active{display:block;animation:fade .35s ease forwards}

.form-step h2{
  font-family:var(--font-serif);font-weight:500;
  font-size:24px;color:var(--ink);margin-bottom:8px;
}
.form-step .hint{
  font-size:13px;color:var(--muted);margin-bottom:28px;line-height:1.7;
}

.field-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:22px 26px;
}
.field-grid .full{grid-column:1/-1}
@media (max-width:720px){
  .field-grid{grid-template-columns:1fr;gap:18px}
}

.field{display:flex;flex-direction:column;gap:8px;position:relative}
.field label{
  font-size:11px;letter-spacing:.24em;text-transform:uppercase;
  color:var(--ink);font-weight:500;
}
.field label .req{color:var(--signal);margin-left:4px}
.field label .opt{
  margin-left:8px;font-size:10px;color:var(--muted);
  letter-spacing:.18em;
}
.field input,.field select,.field textarea{
  width:100%;
  padding:14px 16px;
  border:1px solid var(--line);
  background:#fff;
  font-family:var(--font-sans);font-size:15px;color:var(--ink);
  border-radius:0;
  transition:border-color .2s, box-shadow .2s;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--navy);
  box-shadow:0 0 0 3px rgba(27,58,91,.08);
}
.field textarea{min-height:120px;resize:vertical;line-height:1.7}
.field .help{font-size:12px;color:var(--muted);line-height:1.6}
.field .err{
  font-size:12px;color:var(--signal);
  display:none;
}
.field.invalid input,.field.invalid select,.field.invalid textarea{
  border-color:var(--signal);background:rgba(195,66,43,.04);
}
.field.invalid .err{display:block}

.checks{display:flex;flex-wrap:wrap;gap:10px}
.check{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 14px;
  border:1px solid var(--line);
  background:#fff;
  font-size:13px;color:var(--ink);
  cursor:pointer;
  transition:.2s;
  user-select:none;
}
.check input{appearance:none;width:14px;height:14px;border:1px solid var(--line);background:#fff;cursor:pointer;position:relative}
.check input:checked{background:var(--navy);border-color:var(--navy)}
.check input:checked::after{
  content:"";position:absolute;left:3px;top:0px;
  width:6px;height:9px;border-right:1.5px solid #fff;border-bottom:1.5px solid #fff;
  transform:rotate(40deg);
}
.check.has-check{cursor:pointer}
.check:has(input:checked){border-color:var(--navy);background:rgba(27,58,91,.04)}

.consent{
  display:flex;align-items:flex-start;gap:12px;
  padding:18px 20px;
  background:var(--paper-2);
  border:1px dashed var(--line);
  font-size:13px;line-height:1.75;color:var(--ink-soft);
}
.consent input{margin-top:4px;flex-shrink:0;width:16px;height:16px;accent-color:var(--navy);cursor:pointer}
.consent a{color:var(--navy);border-bottom:1px solid var(--navy)}

.dropzone{
  border:1.5px dashed var(--line);
  background:var(--paper-2);
  padding:30px 20px;
  text-align:center;
  cursor:pointer;
  transition:.2s;
}
.dropzone:hover,.dropzone.drag{border-color:var(--navy);background:rgba(27,58,91,.05)}
.dropzone .ico{font-family:var(--font-italic);font-style:italic;font-size:32px;color:var(--navy);display:block;margin-bottom:8px}
.dropzone .t{font-size:13px;color:var(--ink);font-weight:500;letter-spacing:.05em;margin-bottom:4px}
.dropzone .h{font-size:11.5px;color:var(--muted);letter-spacing:.05em}
.file-list{margin-top:14px;display:flex;flex-direction:column;gap:8px}
.file-list .file{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:10px 14px;
  background:#fff;border:1px solid var(--line);
  font-size:13px;
}
.file-list .file .name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file-list .file .sz{font-size:11px;color:var(--muted);letter-spacing:.05em}
.file-list .file .x{
  width:24px;height:24px;border:1px solid var(--line);
  background:#fff;cursor:pointer;color:var(--muted);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:14px;
}
.file-list .file .x:hover{color:var(--signal);border-color:var(--signal)}

.form-foot{
  display:flex;justify-content:space-between;align-items:center;gap:16px;
  margin-top:42px;padding-top:28px;
  border-top:1px solid var(--line);
}
@media (max-width:560px){
  .form-foot{flex-direction:column-reverse;gap:12px}
  .form-foot .btn{width:100%}
}

.toast{
  position:fixed;left:50%;top:32px;transform:translate(-50%, -20px);
  background:var(--ink);color:var(--paper);
  padding:14px 22px;
  font-size:13px;letter-spacing:.06em;
  z-index:200;opacity:0;pointer-events:none;
  transition:.25s;
  border:1px solid rgba(246,244,239,.12);
}
.toast.show{transform:translate(-50%, 0);opacity:1}
.toast.signal{background:var(--signal)}
.toast.accent{background:var(--accent)}

/* ============================================================
 * 小组件 / 杂项
 * ============================================================ */
.tag-chip{
  display:inline-block;
  padding:4px 10px;
  border:1px solid var(--line);
  font-size:10.5px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--ink-soft);
  margin:2px 4px 2px 0;
}
.tag-chip.signal{color:var(--signal);border-color:var(--signal)}
.tag-chip.navy{color:var(--navy);border-color:var(--navy)}
.tag-chip.solid{background:var(--ink);color:var(--paper);border-color:var(--ink)}

.kv-grid{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:36px 40px;
}
@media (max-width:880px){.kv-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:480px){.kv-grid{grid-template-columns:1fr;gap:22px}}
.kv .k{
  font-size:11px;letter-spacing:.32em;text-transform:uppercase;
  color:var(--muted);font-weight:500;margin-bottom:8px;
}
.kv .v{
  font-family:var(--font-italic);font-style:italic;
  font-size:22px;color:var(--ink);letter-spacing:.02em;
}
.kv .v small{font-size:13px;font-style:normal;font-family:var(--font-sans);color:var(--muted);margin-left:8px;letter-spacing:.05em}

/* 入场动画 */
.fade{opacity:0;transform:translateY(12px);animation:fade .85s ease forwards}
.d1{animation-delay:.05s}.d2{animation-delay:.18s}.d3{animation-delay:.32s}
.d4{animation-delay:.45s}.d5{animation-delay:.58s}.d6{animation-delay:.7s}
@keyframes fade{to{opacity:1;transform:none}}

/* 媒体板 / 大图占位 */
.plate{
  position:relative;
  aspect-ratio:4/5;
  background:linear-gradient(180deg,#fbfaf5 0%, #efede4 100%);
  border:1px solid var(--line);
  overflow:hidden;
}
.plate::before{
  content:"";position:absolute;inset:14px;border:.5px solid var(--line);
}
.plate svg,.plate img{position:absolute;inset:18px;width:calc(100% - 36px);height:calc(100% - 36px);object-fit:cover}

/* 工具类 */
.text-center{text-align:center}
.muted{color:var(--muted)}
.ink{color:var(--ink)}
.navy{color:var(--navy)}
.signal{color:var(--signal)}
.serif{font-family:var(--font-serif)}
.italic{font-family:var(--font-italic);font-style:italic}
.upper{text-transform:uppercase;letter-spacing:.22em}
.mt-0{margin-top:0}.mt-2{margin-top:14px}.mt-4{margin-top:28px}.mt-6{margin-top:48px}
.mb-0{margin-bottom:0}

/* ============================================================
 * 移动端微调
 * ============================================================ */
@media (max-width:640px){
  .container{padding-left:5vw;padding-right:5vw}
  .section{padding:48px 0}
  .form-shell{padding:24px 18px}
  .form-shell::before{inset:6px}
  .steps{gap:4px}
  .steps .step{font-size:10px;letter-spacing:.16em}
  .steps .sep{max-width:18px}
  .steps .step .num{width:22px;height:22px;font-size:11px}
  .article{font-size:15.5px;line-height:1.95}
  .article h2{font-size:24px;margin:40px 0 16px}
}