/* ═══════════════════════════════════════════
   守藏 Archiva — Brand Visual Identity
   藏青 Indigo Ink  #1B2A4A
   纸白 Rice Paper  #FAF8F3
   墨黑 Ink          #14182B
   朱砂 Vermilion   #C8443A
   靛青 Indigo Dye  #2E4374
   石绿 Patina      #6B8E7F
   ═══════════════════════════════════════════ */

:root {
  --ink: #1B2A4A;
  --paper: #FAF8F3;
  --text: #14182B;
  --vermilion: #C8443A;
  --indigo: #2E4374;
  --patina: #6B8E7F;
  --border: #e0dcd3;
  --text-light: #5a5a5a;
  --max-w: 1200px;
  --reading: 680px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

html{scroll-behavior:smooth;font-size:18px}
body{font-family:"PingFang SC","Noto Sans SC","Microsoft YaHei","Helvetica Neue",sans-serif;color:var(--text);background:var(--paper);line-height:1.7;-webkit-font-smoothing:antialiased}

h1,h2,h3{font-family:"Fraunces","Noto Serif SC","STSong","Songti SC",serif;font-weight:600;line-height:1.25;letter-spacing:-0.01em}
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}
.section-title{font-size:2.2rem;text-align:center;margin-bottom:1rem}
.section-lead{text-align:center;max-width:var(--reading);margin:0 auto 3rem;color:var(--text-light)}
.vermilion{color:var(--vermilion)}.vermilion-bg{background:var(--vermilion)!important;color:var(--paper)!important}

a{color:var(--indigo);text-decoration:none;transition:color .2s}
a:hover{color:var(--vermilion)}

/* ── Buttons ── */
.btn-primary,.btn-primary-sm{display:inline-block;background:var(--vermilion);color:var(--paper);border:none;padding:14px 32px;font-size:1rem;font-weight:600;border-radius:3px;cursor:pointer;transition:transform .15s,box-shadow .15s;text-decoration:none}
.btn-primary:hover,.btn-primary-sm:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(200,68,58,.3);color:var(--paper)}
.btn-outline,.btn-outline-sm{display:inline-block;border:2px solid currentColor;color:inherit;padding:12px 28px;font-size:1rem;font-weight:600;border-radius:3px;text-decoration:none;transition:all .15s}
.btn-outline:hover,.btn-outline-sm:hover{background:rgba(255,255,255,.1)}
.btn-primary-sm{padding:10px 24px;font-size:.9rem}
.btn-outline-sm{padding:8px 20px;font-size:.9rem}

/* ── Hero ── */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--ink);color:var(--paper);overflow:hidden;text-align:center}
.hero-bg{position:absolute;inset:0;background:radial-gradient(ellipse at 30% 50%,#2E4374 0%,#1B2A4A 70%);opacity:.6}
.hero-content{position:relative;z-index:1;max-width:780px;padding:80px 24px}
.eyebrow{display:inline-block;font-family:"JetBrains Mono","Courier New",monospace;font-size:.75rem;letter-spacing:.12em;text-transform:uppercase;color:var(--vermilion);margin-bottom:1.5rem}
.hero-thesis{font-size:3.8rem;font-weight:700;margin-bottom:1.2rem;line-height:1.15}
.vermilion-mark{border-bottom:3px solid var(--vermilion);padding-bottom:2px}
.hero-sub{font-size:1.1rem;line-height:1.8;opacity:.85;margin-bottom:2.5rem;font-family:"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif}
.hero-cta{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:2rem}
.hero-cta .btn-outline{border-color:var(--paper);color:var(--paper)}
.hero-trust{font-size:.8rem;opacity:.5;font-family:"JetBrains Mono","Courier New",monospace}

/* ── Value Prop Steps ── */
.value-prop{padding:100px 0}
.steps{display:flex;align-items:flex-start;gap:16px;flex-wrap:wrap;justify-content:center}
.step{flex:1;min-width:160px;max-width:220px;text-align:center;padding:24px 16px;background:#fff;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,.04)}
.step-num{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:4px;background:var(--ink);color:var(--paper);font-weight:700;margin-bottom:12px;font-family:"JetBrains Mono",monospace;font-size:.85rem}
.step-arrow{font-size:1.5rem;color:var(--vermilion);padding-top:36px;display:none}
.step h3{font-size:1.1rem;margin-bottom:.4rem}.step p{font-size:.85rem;color:var(--text-light)}
@media(min-width:900px){.step-arrow{display:block}}

/* ── Pain Points ── */
.pain-points{padding:80px 0;background:#fff}
.pain-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px;max-width:1000px;margin:0 auto}
.pain-card{padding:28px;border-radius:8px;border:1px solid var(--border);transition:box-shadow .2s}
.pain-card:hover{box-shadow:0 4px 16px rgba(0,0,0,.06)}
.pain-icon{font-size:1.4rem;margin-bottom:8px}.pain-card h4{font-size:1rem;margin-bottom:.4rem}
.pain-card p{font-size:.85rem;color:var(--text-light);margin-bottom:.8rem}
.pain-fix{font-size:.8rem;color:var(--vermilion);font-weight:600}

/* ── Capabilities ── */
.capabilities{padding:100px 0}
.cap-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:32px}
.cap-item{padding:32px;border-left:3px solid var(--border);transition:border-color .2s}
.cap-item:hover{border-color:var(--vermilion)}
.cap-num{font-family:"Fraunces",serif;font-size:2.5rem;font-weight:700;color:var(--ink);margin-bottom:.5rem;opacity:.3}.cap-num.vermilion{color:var(--vermilion);opacity:1}
.cap-item h3{font-size:1.2rem;margin-bottom:.6rem}
.cap-item p{font-size:.9rem;color:var(--text-light)}
.cap-item strong{color:var(--vermilion)}

/* ── Comparison Table ── */
.compare{padding:80px 0;background:#fff}
.table-wrap{overflow-x:auto;max-width:900px;margin:0 auto}
table{width:100%;border-collapse:collapse;font-size:.9rem}
th,td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--border)}
th{background:var(--ink);color:var(--paper);font-weight:600}
th.us{background:var(--vermilion)}
.us{font-weight:600}
tr:hover td{background:#faf9f6}

/* ── Scenarios ── */
.scenarios{padding:80px 0}
.scene-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px}
.scene-card{text-align:center;padding:28px 16px;border-radius:8px;background:#fff;border:1px solid var(--border);transition:transform .2s}
.scene-card:hover{transform:translateY(-2px)}
.scene-icon{font-size:2rem;display:block;margin-bottom:.6rem}
.scene-card h4{font-size:.95rem;margin-bottom:.4rem}
.scene-card p{font-size:.8rem;color:var(--text-light)}

/* ── Pricing ── */
.pricing{padding:80px 0;background:#fff}
.price-grid{display:flex;gap:24px;justify-content:center;flex-wrap:wrap;max-width:1000px;margin:0 auto 2rem}
.price-card{flex:1;min-width:240px;max-width:300px;padding:36px 28px;border-radius:10px;border:2px solid var(--border);text-align:center;background:var(--paper)}
.price-card.featured{border-color:var(--vermilion);transform:scale(1.03);box-shadow:0 8px 30px rgba(200,68,58,.12)}
.badge{display:inline-block;background:var(--vermilion);color:var(--paper);padding:4px 14px;border-radius:20px;font-size:.75rem;font-weight:600;margin-bottom:.8rem}
.price{font-family:"Fraunces",serif;font-size:2.2rem;font-weight:700;color:var(--ink);margin:.6rem 0}
.price-card p{font-size:.85rem;color:var(--text-light);margin-bottom:1.2rem;line-height:1.6}
.price-note{text-align:center;font-size:.8rem;color:var(--text-light)}

/* ── Contact ── */
.contact{padding:80px 0}
.contact-wrap{display:grid;grid-template-columns:1fr 280px;gap:40px;max-width:900px;margin:0 auto}
.contact-form{display:flex;flex-direction:column;gap:16px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.contact-form input,.contact-form select,.contact-form textarea{width:100%;padding:12px 16px;border:1px solid var(--border);border-radius:4px;font-size:.9rem;font-family:inherit;background:#fff;transition:border-color .2s}
.contact-form input:focus,.contact-form select:focus,.contact-form textarea:focus{outline:none;border-color:var(--vermilion)}
.contact-form button{align-self:flex-start}
.form-note{font-size:.85rem;min-height:1.2em}
.form-note.success{color:var(--patina)}.form-note.error{color:var(--vermilion)}
.contact-info{font-size:.9rem;line-height:1.8}

/* ── Footer ── */
.footer{padding:60px 0 30px;background:var(--ink);color:rgba(255,255,255,.7);font-size:.85rem}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-grid strong{color:#fff;font-size:1rem;display:block;margin-bottom:.5rem}
.footer-slogan{font-size:.8rem;opacity:.6;margin-top:.5rem}
.footer-grid h4{color:#fff;font-family:"PingFang SC","Noto Sans SC",sans-serif;font-size:.9rem;margin-bottom:.8rem;font-weight:600}
.footer-grid a{display:block;color:rgba(255,255,255,.5);font-size:.8rem;margin-bottom:.4rem;transition:color .2s}
.footer-grid a:hover{color:var(--vermilion)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:20px;text-align:center;font-size:.75rem;opacity:.5}

/* ── Responsive ── */
@media(max-width:768px){
  html{font-size:16px}
  .hero-thesis{font-size:2.4rem}
  .hero-sub{font-size:1rem}
  .section-title{font-size:1.6rem}
  .steps{flex-direction:column;align-items:center}.step{max-width:100%}.step-arrow{display:block;transform:rotate(90deg);padding:0}
  .contact-wrap{grid-template-columns:1fr}.form-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .cap-grid{grid-template-columns:1fr}
  .price-card.featured{transform:none}
}
@media(max-width:480px){
  .hero-thesis{font-size:2rem}
  .hero-cta{flex-direction:column;align-items:center}
  .footer-grid{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}