:root{
    --paper:#F3EFE4;
    --paper-deep:#EAE3D2;
    --ink:#1E2A45;
    --ink-soft:#3B4A6B;
    --red:#B5432E;
    --blue:#2E5090;
    --gold:#AD8148;
    --text:#2B2620;
    --text-soft:#5B5548;
    --line:rgba(30,42,69,0.14);
  }
  *{margin:0;padding:0;box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    background:var(--paper);
    color:var(--text);
    font-family:'Noto Sans KR',sans-serif;
    line-height:1.6;
    overflow-x:hidden;
  }
  h1,h2,h3,.serif{font-family:'Noto Serif KR',serif;}
  a{text-decoration:none;color:inherit;}
  img{max-width:100%;display:block;}
  .wrap{max-width:1120px;margin:0 auto;padding:0 28px;}

  @media (prefers-reduced-motion: reduce){
    *{animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important;}
  }

  /* Airmail stripe — signature motif */
  .airmail{
    height:10px;
    background:repeating-linear-gradient(-45deg,
      var(--red) 0 18px, var(--paper) 18px 26px,
      var(--blue) 26px 44px, var(--paper) 44px 52px);
  }

  /* Header */
  header{
    position:sticky; top:0; z-index:50;
    background:rgba(243,239,228,0.92);
    backdrop-filter:blur(8px);
    border-bottom:1px solid var(--line);
  }
  .nav{display:flex; align-items:center; justify-content:space-between; padding:18px 28px;}
  .logo{font-size:20px; font-weight:900; letter-spacing:-0.02em; color:var(--ink); display:flex; align-items:center; gap:8px; white-space:nowrap;}
  .logo .dot{width:9px;height:9px;border-radius:50%;background:var(--red);display:inline-block;}
  nav.links{display:flex; gap:36px; font-size:15px; font-weight:500; color:var(--ink-soft);}
  nav.links a{position:relative; padding:4px 0;}
  nav.links a::after{content:'';position:absolute;left:0;bottom:-2px;width:0;height:1.5px;background:var(--red);transition:width .25s ease;}
  nav.links a:hover::after{width:100%;}
  .btn{
    display:inline-flex; align-items:center; gap:8px;
    padding:12px 22px; border-radius:3px;
    background:var(--ink); color:var(--paper);
    font-weight:600; font-size:14.5px;
    border:1px solid var(--ink);
    cursor:pointer; transition:transform .2s ease, background .2s ease;
  }
  .btn:hover{background:var(--red); border-color:var(--red); transform:translateY(-1px);}
  .btn.ghost{background:transparent; color:var(--ink); border:1px solid var(--ink);}
  .btn.ghost:hover{background:var(--ink); color:var(--paper);}

  /* Hero */
  .hero{
    padding:96px 0 70px; position:relative;
  }
  .hero-grid{display:grid; grid-template-columns:1.1fr 0.9fr; gap:64px; align-items:center;}
  .eyebrow{
    display:inline-flex; align-items:center; gap:10px;
    font-size:13px; font-weight:700; letter-spacing:.14em; color:var(--red);
    margin-bottom:22px; text-transform:uppercase;
  }
  .eyebrow::before{content:'';width:22px;height:1px;background:var(--red);}
  .hero h1{
    font-size:clamp(36px,5vw,58px); font-weight:900; color:var(--ink);
    line-height:1.22; letter-spacing:-0.01em; margin-bottom:26px;
  }
  .hero h1 em{font-style:normal; color:var(--red); position:relative;}
  .hero p.lead{font-size:17.5px; color:var(--text-soft); max-width:460px; margin-bottom:36px;}
  .hero-cta{display:flex; gap:14px; margin-bottom:44px;}
  .stat-row{display:flex; gap:38px; padding-top:28px; border-top:1px solid var(--line);}
  .stat b{display:block; font-family:'Noto Serif KR',serif; font-size:26px; color:var(--ink);}
  .stat span{font-size:13px; color:var(--text-soft);}

  /* Envelope illustration */
  .envelope-stage{position:relative; aspect-ratio:1/1; display:flex; align-items:center; justify-content:center;}
  .envelope{
    position:relative; width:88%; aspect-ratio:4/2.9;
    background:#fff; border:1.5px solid var(--ink); border-radius:4px;
    box-shadow:0 30px 60px -20px rgba(30,42,69,0.35);
  }
  .envelope::before{
    content:''; position:absolute; inset:0;
    background:
      linear-gradient(to bottom right, transparent 49.6%, var(--ink) 49.6%, var(--ink) 50.4%, transparent 50.4%),
      linear-gradient(to bottom left, transparent 49.6%, var(--ink) 49.6%, var(--ink) 50.4%, transparent 50.4%);
    opacity:0.5;
  }
  .flap{
    position:absolute; top:-1.5px; left:-1.5px; right:-1.5px; height:52%;
    background:var(--ink);
    clip-path:polygon(0 0,100% 0,50% 100%);
    transform-origin:top center;
    animation:flapOpen 2.2s ease forwards;
    animation-delay:.4s;
  }
  @keyframes flapOpen{
    0%{transform:rotateX(0deg);}
    100%{transform:rotateX(180deg);}
  }
  .seal{
    position:absolute; top:44%; left:50%; transform:translate(-50%,-50%);
    width:64px; height:64px; border-radius:50%;
    background:var(--gold); color:var(--paper);
    display:flex; align-items:center; justify-content:center;
    font-family:'Noto Serif KR',serif; font-weight:700; font-size:22px;
    box-shadow:0 8px 18px rgba(173,129,72,0.5);
    z-index:2; letter-spacing:-0.03em;
    animation:pop .5s ease .6s backwards;
  }
  @keyframes pop{from{transform:translate(-50%,-50%) scale(0);} to{transform:translate(-50%,-50%) scale(1);}}
  .postmark{
    position:absolute; bottom:-18px; right:-14px; width:110px; height:110px;
    border:2px solid var(--red); border-radius:50%;
    display:flex; align-items:center; justify-content:center; text-align:center;
    background:var(--paper); transform:rotate(-14deg);
    animation:stamp .4s ease .9s backwards;
  }
  @keyframes stamp{from{transform:rotate(-14deg) scale(0);} to{transform:rotate(-14deg) scale(1);}}
  .postmark span{font-size:11px; font-weight:700; color:var(--red); letter-spacing:.06em; line-height:1.5;}

  /* Section shell */
  section{padding:104px 0;}
  .section-head{max-width:560px; margin-bottom:56px;}
  .section-head .eyebrow{margin-bottom:16px;}
  .section-head h2{font-size:clamp(28px,3.4vw,38px); color:var(--ink); font-weight:700; line-height:1.32;}
  .section-head p{color:var(--text-soft); margin-top:14px; font-size:16px;}

  /* Features */
  .features-bg{background:var(--paper-deep);}
  .feat-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--line); border:1px solid var(--line);}
  .feat{background:var(--paper-deep); padding:36px 28px; transition:background .25s ease;}
  .feat:hover{background:var(--paper);}
  .feat .num{font-family:'Noto Serif KR',serif; font-size:14px; color:var(--red); font-weight:700; margin-bottom:22px;}
  .feat h3{font-size:18px; color:var(--ink); margin-bottom:10px; font-weight:700;}
  .feat p{font-size:14.5px; color:var(--text-soft);}

  /* How it works */
  .steps{display:grid; grid-template-columns:repeat(4,1fr); gap:0; position:relative;}
  .steps::before{
    content:''; position:absolute; top:23px; left:0; right:0; height:1px;
    background:repeating-linear-gradient(to right, var(--line) 0 8px, transparent 8px 16px);
  }
  .step{position:relative; padding-right:20px;}
  .step-dot{
    width:46px; height:46px; border-radius:50%; background:var(--ink); color:var(--paper);
    display:flex; align-items:center; justify-content:center; font-family:'Noto Serif KR',serif;
    font-weight:700; font-size:17px; margin-bottom:22px; position:relative; z-index:1;
  }
  .step:nth-child(2) .step-dot{background:var(--blue);}
  .step:nth-child(3) .step-dot{background:var(--gold);}
  .step:nth-child(4) .step-dot{background:var(--red);}
  .step h3{font-size:16.5px; color:var(--ink); margin-bottom:8px; font-weight:700;}
  .step p{font-size:14px; color:var(--text-soft);}

  /* Testimonials */
  .testi-bg{background:var(--ink); color:var(--paper);}
  .testi-bg .section-head h2{color:var(--paper);}
  .testi-bg .section-head p{color:rgba(243,239,228,0.68);}
  .testi-bg .eyebrow{color:#E7A98C;}
  .testi-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:24px;}
  .testi{
    background:rgba(243,239,228,0.06); border:1px solid rgba(243,239,228,0.14);
    border-radius:4px; padding:30px 26px;
  }
  .testi .quote-mark{font-family:'Noto Serif KR',serif; font-size:34px; color:var(--red); line-height:1; margin-bottom:14px; display:block;}
  .testi p{font-size:14.5px; color:rgba(243,239,228,0.86); margin-bottom:20px;}
  .testi .who{font-size:13px; color:rgba(243,239,228,0.5); font-weight:600;}

  /* Download CTA */
  .cta-band{
    background:var(--paper); text-align:center; padding:110px 0;
    position:relative;
  }
  .cta-band h2{font-size:clamp(30px,4vw,44px); color:var(--ink); font-weight:700; margin-bottom:18px;}
  .cta-band p{color:var(--text-soft); font-size:16.5px; margin-bottom:38px;}
  .store-row{display:flex; gap:14px; justify-content:center; flex-wrap:wrap;}
  .store-btn{
    display:flex; align-items:center; gap:10px; padding:13px 26px;
    border:1.5px solid var(--ink); border-radius:4px; font-weight:600; font-size:14.5px;
    color:var(--ink); transition:all .2s ease;
  }
  .store-btn:hover{background:var(--ink); color:var(--paper);}
  .store-btn .sicon{font-size:19px;}

  footer{background:var(--ink); color:rgba(243,239,228,0.6); padding:52px 0 30px; font-size:13.5px;}
  .foot-grid{display:flex; justify-content:space-between; flex-wrap:wrap; gap:30px; margin-bottom:34px;}
  .foot-logo{font-family:'Noto Serif KR',serif; font-size:19px; color:var(--paper); font-weight:700; margin-bottom:10px;}
  .foot-links{display:flex; gap:28px; flex-wrap:wrap;}
  .foot-links a{opacity:.85;}
  .foot-links a:hover{color:var(--paper);}
  .foot-bottom{border-top:1px solid rgba(243,239,228,0.14); padding-top:22px; display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;}

  @media (max-width:860px){
    .hero-grid{grid-template-columns:1fr; gap:48px;}
    .envelope-stage{order:-1; max-width:340px; margin:0 auto;}
    .nav{grid-template-columns:none; flex-wrap:wrap; gap:12px 0; padding:14px 18px 0;}
    nav.links{order:3; width:100%; gap:20px; font-size:14px;
      overflow-x:auto; padding:12px 0 11px; border-top:1px solid var(--line);
      margin-top:12px; -webkit-overflow-scrolling:touch;}
    nav.links a{white-space:nowrap;}
    nav.links::-webkit-scrollbar{display:none;}
    .nav .logo{font-size:18px;}
    .nav .btn{padding:9px 15px; font-size:13px;}
    .feat-grid{grid-template-columns:repeat(2,1fr);}
    .steps{grid-template-columns:repeat(2,1fr); row-gap:36px;}
    .steps::before{display:none;}
    .testi-grid{grid-template-columns:1fr;}
    .foot-grid{flex-direction:column;}
  }

/* ===== 하위 페이지 공통 ===== */
.page-hero{padding:70px 0 46px; border-bottom:1px solid var(--line);}
.page-hero h1{font-size:clamp(30px,4.4vw,44px); color:var(--ink); font-weight:900;
  line-height:1.28; letter-spacing:-0.01em; margin-bottom:14px;}
.page-hero p{font-size:16.5px; color:var(--text-soft); max-width:520px;}

.block{padding:76px 0;}
.block.alt{background:var(--paper-deep);}
.block h2{font-size:clamp(24px,3vw,32px); color:var(--ink); font-weight:700;
  line-height:1.35; margin-bottom:14px;}
.block > .wrap > p.intro{color:var(--text-soft); font-size:16px; margin-bottom:40px; max-width:540px;}

/* 이용방법 단계 */
.flow{position:relative; padding-left:56px;}
.flow::before{content:''; position:absolute; left:21px; top:10px; bottom:10px; width:2px;
  background:repeating-linear-gradient(to bottom, var(--line) 0 7px, transparent 7px 14px);}
.flow-item{position:relative; padding-bottom:42px;}
.flow-item:last-child{padding-bottom:0;}
.flow-item .no{position:absolute; left:-56px; top:0; width:44px; height:44px; border-radius:50%;
  background:var(--ink); color:var(--paper); display:flex; align-items:center; justify-content:center;
  font-family:'Noto Serif KR',serif; font-weight:700; font-size:17px;}
.flow-item:nth-child(2) .no{background:var(--blue);}
.flow-item:nth-child(3) .no{background:var(--gold);}
.flow-item:nth-child(4) .no{background:var(--red);}
.flow-item:nth-child(5) .no{background:var(--ink-soft);}
.flow-item h3{font-size:19px; color:var(--ink); font-weight:700; margin-bottom:8px; padding-top:8px;}
.flow-item p{font-size:15px; color:var(--text-soft); max-width:520px;}
.flow-item ul{margin-top:10px; padding-left:18px;}
.flow-item li{font-size:14.5px; color:var(--text-soft); margin-bottom:5px;}

/* 요금표 */
.ptable{width:100%; border-collapse:collapse; background:#fff;
  border:1px solid var(--line); border-radius:4px; overflow:hidden;}
.ptable th{background:var(--ink); color:var(--paper); font-size:14px; font-weight:700;
  padding:15px 16px; text-align:left;}
.ptable td{padding:15px 16px; border-top:1px solid var(--line); font-size:15px; color:var(--text-soft);}
.ptable td:last-child{text-align:right; font-weight:700; color:var(--ink); white-space:nowrap;}
.ptable tr:nth-child(even) td{background:#FBFAF6;}
.ptable caption{caption-side:bottom; text-align:left; font-size:13px;
  color:var(--text-soft); padding-top:12px;}

.pcards{display:grid; grid-template-columns:repeat(3,1fr); gap:16px; margin-bottom:34px;}
.pcard{background:#fff; border:1px solid var(--line); border-radius:6px; padding:26px 22px;
  position:relative;}
.pcard.best{border:2px solid var(--red);}
.pcard .tag{position:absolute; top:-11px; left:20px; background:var(--red); color:var(--paper);
  font-size:11.5px; font-weight:700; padding:3px 10px; border-radius:3px; letter-spacing:.04em;}
.pcard h3{font-size:18px; color:var(--ink); font-weight:700; margin-bottom:6px;}
.pcard .amt{font-family:'Noto Serif KR',serif; font-size:27px; color:var(--ink);
  font-weight:700; margin-bottom:10px;}
.pcard p{font-size:13.5px; color:var(--text-soft);}

/* FAQ */
.faq-cat{font-size:13px; font-weight:700; letter-spacing:.12em; color:var(--red);
  text-transform:uppercase; margin:44px 0 16px;}
.faq-cat:first-of-type{margin-top:0;}
details.qa{background:#fff; border:1px solid var(--line); border-radius:4px;
  margin-bottom:9px; overflow:hidden;}
details.qa summary{padding:19px 52px 19px 20px; font-size:15.5px; font-weight:700; color:var(--ink);
  cursor:pointer; position:relative; list-style:none;}
details.qa summary::-webkit-details-marker{display:none;}
details.qa summary::after{content:'+'; position:absolute; right:20px; top:17px;
  font-size:22px; font-weight:400; color:var(--ink-soft); transition:transform .2s ease;}
details.qa[open] summary::after{content:'−';}
details.qa summary:hover{background:#FBFAF6;}
details.qa .ans{padding:0 20px 20px; font-size:14.5px; color:var(--text-soft); line-height:1.75;}
details.qa .ans p{margin-bottom:10px;}
details.qa .ans p:last-child{margin-bottom:0;}
details.qa .ans ul{padding-left:18px; margin:8px 0;}
details.qa .ans li{margin-bottom:5px;}

/* 안내 박스 */
.note{background:#FFF8E8; border-left:3px solid var(--gold); border-radius:0 5px 5px 0;
  padding:18px 20px; font-size:14.5px; color:var(--text-soft); line-height:1.75; margin:26px 0;}
.note b{color:var(--ink); display:block; margin-bottom:5px; font-size:15px;}

/* 하단 유도 */
.endcta{background:var(--ink); text-align:center; padding:80px 0;}
.endcta h2{color:var(--paper); font-size:clamp(24px,3vw,32px); font-weight:700; margin-bottom:14px;}
.endcta p{color:rgba(243,239,228,.68); font-size:15.5px; margin-bottom:30px;}
.endcta .btn{background:var(--paper); color:var(--ink); border-color:var(--paper);}
.endcta .btn:hover{background:var(--red); color:var(--paper); border-color:var(--red);}

nav.links a.on{color:var(--red);}
nav.links a.on::after{width:100%;}

@media (max-width:860px){
  .pcards{grid-template-columns:1fr;}
  .ptable th:nth-child(2), .ptable td:nth-child(2){display:none;}
  .flow{padding-left:48px;}
  .flow::before{left:17px;}
  .flow-item .no{left:-48px; width:36px; height:36px; font-size:15px;}
}


/* ===== 문의 폼 ===== */
.form-wrap{max-width:620px;}
.field{margin-bottom:22px;}
.field label{display:block; font-size:14.5px; font-weight:700; color:var(--ink); margin-bottom:8px;}
.field label .req{color:var(--red); margin-left:3px;}
.field .help{font-size:13px; color:var(--text-soft); margin-top:6px;}
.field input[type=text],
.field input[type=email],
.field select,
.field textarea{
  width:100%; padding:14px 15px; font-family:'Noto Sans KR',sans-serif; font-size:15px;
  color:var(--text); background:#fff; border:1px solid var(--line); border-radius:4px;
  line-height:1.6;
}
.field textarea{min-height:180px; resize:vertical;}
.field input:focus, .field select:focus, .field textarea:focus{
  outline:2px solid var(--ink); outline-offset:-1px; border-color:transparent;
}
.field select{appearance:none; cursor:pointer;
  background-image:linear-gradient(45deg,transparent 50%,var(--ink-soft) 50%),
    linear-gradient(135deg,var(--ink-soft) 50%,transparent 50%);
  background-position:calc(100% - 20px) 21px, calc(100% - 15px) 21px;
  background-size:5px 5px, 5px 5px; background-repeat:no-repeat;}

.consent{display:flex; gap:11px; align-items:flex-start;
  background:#fff; border:1px solid var(--line); border-radius:4px; padding:16px 17px;}
.consent input[type=checkbox]{width:19px; height:19px; margin-top:2px; flex-shrink:0; accent-color:var(--red);}
.consent label{font-size:14px; color:var(--text-soft); font-weight:400; line-height:1.65; margin:0;}
.consent label b{color:var(--ink); font-weight:700;}

button.submit{
  width:100%; padding:17px; border:none; border-radius:4px; cursor:pointer;
  background:var(--ink); color:var(--paper);
  font-family:'Noto Sans KR',sans-serif; font-size:16px; font-weight:700;
  transition:background .2s ease;
}
button.submit:hover{background:var(--red);}

.hp{position:absolute; left:-9999px; opacity:0; height:0; overflow:hidden;}

.contact-side{background:var(--paper-deep); border-radius:5px; padding:26px 24px; margin-top:38px;}
.contact-side h3{font-size:17px; color:var(--ink); font-weight:700; margin-bottom:10px;}
.contact-side p{font-size:14.5px; color:var(--text-soft); line-height:1.75;}

.thanks{text-align:center; padding:100px 0 90px;}
.thanks .seal-ok{width:78px; height:78px; border-radius:50%; background:var(--gold);
  margin:0 auto 26px; display:flex; align-items:center; justify-content:center;}
.thanks h1{font-size:clamp(26px,3.6vw,36px); color:var(--ink); font-weight:900; margin-bottom:14px;}
.thanks p{font-size:16px; color:var(--text-soft); margin-bottom:32px; line-height:1.8;}