/* =========================================
   SURF SEEN - Dify.ai-inspired Layout v8
   Notes:
   - Minimal rounding (avoid excessive radius)
   - Dark hero with subtle gradient
   - Clean sections, crisp typography
   - Parallax sections via data-parallax + JS
   ========================================= */
:root{
  --bg: #f7fbff;
  --bg2:#ffffff;
  --surface:#ffffff;
  --surface2:#fbfdff;
  --text:#0b1220;
  --muted: rgba(11,18,32,.62);
  --muted2: rgba(11,18,32,.48);
  --border: rgba(11,18,32,.10);
  --border2: rgba(11,18,32,.06);
  --accent:#6ee7ff;
  --accent2:#a78bfa;
  --accent3:#34d399;
  --warn:#f59e0b;
  --radius: 10px;
  --radius2: 14px;
  --shadow: 0 18px 60px rgba(11,18,32,.10);
  --font: ui-sans-serif, system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", "Segoe UI", Roboto, Helvetica, Arial;
  --wave: url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20width%3D%221200%22%20height%3D%22240%22%20viewBox%3D%220%200%201200%20240%22%3E%0A%20%20%3Cdefs%3E%0A%20%20%20%20%3ClinearGradient%20id%3D%22g%22%20x1%3D%220%22%20x2%3D%221%22%20y1%3D%220%22%20y2%3D%220%22%3E%0A%20%20%20%20%20%20%3Cstop%20offset%3D%220%22%20stop-color%3D%22%236ee7ff%22%20stop-opacity%3D%220.22%22/%3E%0A%20%20%20%20%20%20%3Cstop%20offset%3D%221%22%20stop-color%3D%22%23a78bfa%22%20stop-opacity%3D%220.16%22/%3E%0A%20%20%20%20%3C/linearGradient%3E%0A%20%20%3C/defs%3E%0A%20%20%3Cpath%20d%3D%22M0%2C140%20C120%2C110%20240%2C170%20360%2C140%20C480%2C110%20600%2C170%20720%2C140%20C840%2C110%20960%2C170%201080%2C140%20C1140%2C125%201170%2C118%201200%2C120%20L1200%2C240%20L0%2C240%20Z%22%20fill%3D%22url%28%23g%29%22/%3E%0A%20%20%3Cpath%20d%3D%22M0%2C110%20C120%2C80%20240%2C140%20360%2C110%20C480%2C80%20600%2C140%20720%2C110%20C840%2C80%20960%2C140%201080%2C110%20C1140%2C95%201170%2C88%201200%2C90%22%20fill%3D%22none%22%20stroke%3D%22%236ee7ff%22%20stroke-opacity%3D%220.20%22%20stroke-width%3D%223%22/%3E%0A%20%20%3Cpath%20d%3D%22M0%2C160%20C120%2C130%20240%2C190%20360%2C160%20C480%2C130%20600%2C190%20720%2C160%20C840%2C130%20960%2C190%201080%2C160%20C1140%2C145%201170%2C138%201200%2C140%22%20fill%3D%22none%22%20stroke%3D%22%23a78bfa%22%20stroke-opacity%3D%220.16%22%20stroke-width%3D%222%22/%3E%0A%3C/svg%3E");
}
*
{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:var(--font);
  color:var(--text);
  background:
    radial-gradient(1000px 600px at 12% -10%, rgba(110,231,255,.22), transparent 60%),
    radial-gradient(900px 640px at 92% 0%, rgba(167,139,250,.18), transparent 55%),
    radial-gradient(900px 600px at 60% 115%, rgba(52,211,153,.10), transparent 60%),
    linear-gradient(180deg, #ffffff, var(--bg));
}
a{color:inherit}
.container{max-width:1140px;margin:0 auto;padding:0 22px}
/* Top nav */
.top{
  position:sticky; top:0; z-index:50;
  padding:16px 0;
  background: linear-gradient(180deg, rgba(255,255,255,.92), rgba(255,255,255,.65) 70%, transparent);
  backdrop-filter: blur(10px);
}
.nav{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.brand{
  display:flex;align-items:center;gap:10px;text-decoration:none;
  font-weight:900; letter-spacing:.2px;
}
.brand img{width:32px;height:32px;border-radius:8px;border:1px solid var(--border);object-fit:cover}
.brand span{font-size:14px;opacity:.95}
.navlinks{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.navlinks a{
  text-decoration:none;
  font-size:13px;
  color: var(--muted);
  padding:8px 10px;
  border-radius: 999px;
  border:1px solid transparent;
}
.navlinks a:hover{border-color:var(--border2); background: rgba(11,18,32,.04); color: var(--text)}
.cta{
  text-decoration:none;
  font-size:13px;
  padding:10px 12px;
  border-radius: 999px;
  border:1px solid rgba(110,231,255,.30);
  background: linear-gradient(135deg, rgba(110,231,255,.18), rgba(167,139,250,.18));
  color: var(--text);
}
.cta:hover{border-color: rgba(110,231,255,.45); background: linear-gradient(135deg, rgba(110,231,255,.24), rgba(167,139,250,.22))}
/* Hero */
.hero{padding:34px 0 20px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:18px;align-items:stretch}
@media (max-width:980px){.hero-grid{grid-template-columns:1fr}}
.h-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 10px;border-radius:999px;
  border:1px solid var(--border);
  background: rgba(11,18,32,.03);
  color: var(--muted);
  font-size:12px;
}
.h1{margin:14px 0 12px;font-size:44px;line-height:1.05;letter-spacing:-.5px}
@media (max-width:980px){.h1{font-size:36px}}
.lead{margin:0;color:var(--muted);line-height:1.8;font-size:14px}
.btnrow{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
.btn{
  text-decoration:none;
  padding:11px 14px;
  border-radius: 999px;
  border:1px solid var(--border);
  background: rgba(11,18,32,.03);
  color: var(--text);
  font-size:13px;
}
.btn:hover{background: rgba(11,18,32,.06); border-color: rgba(255,255,255,.16)}
.btn.primary{
  border-color: rgba(110,231,255,.35);
  background: linear-gradient(135deg, rgba(110,231,255,.22), rgba(167,139,250,.20));
}
.kpis{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
.kpi{font-size:12px;color:var(--muted);padding:8px 10px;border:1px solid var(--border2);border-radius: var(--radius);background: rgba(255,255,255,.02)}
/* Cards */
.card{
  border:1px solid var(--border);
  border-radius: var(--radius2);
  background: linear-gradient(180deg, rgba(255,255,255,1), rgba(255,255,255,.92));
  box-shadow: var(--shadow);
  overflow:hidden;
}
.card .inner{padding:16px 16px}
.card h3{margin:0 0 8px;font-size:16px}
.card p{margin:0;color:var(--muted);line-height:1.75;font-size:13px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media (max-width:980px){.grid2{grid-template-columns:1fr}}
/* Section */
.section{padding:46px 0}
.section .title{
  font-size:24px; letter-spacing:-.2px; margin:0 0 10px;
}
.section .desc{margin:0 0 18px; color: var(--muted); line-height:1.9; font-size:14px}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media (max-width:980px){.feature-grid{grid-template-columns:1fr}}
.feature{
  padding:16px;border-radius: var(--radius2);
  border:1px solid var(--border);
  background: rgba(11,18,32,.02);
}
.feature .k{font-size:12px;color:var(--muted2)}
.feature .v{font-size:16px;font-weight:900;margin-top:6px}
/* Parallax blocks */
.parallax{
  position:relative;
  border-top:1px solid var(--border2);
  border-bottom:1px solid var(--border2);
  background: rgba(255,255,255,.70);
  overflow:hidden;
}

.parallax::before{
  content:"";
  position:absolute; inset:-40px 0;
  background-image: var(--parallax-img);
  background-size: cover;
  background-position: center;
  transform: translate3d(0,0,0);
  filter: saturate(1.05) contrast(1.02);
  opacity:.55;
}
.parallax::after{
  content:"";
  position:absolute; inset:0;
  background:
    linear-gradient(180deg, rgba(255,255,255,.92), rgba(255,255,255,.55) 60%, rgba(255,255,255,.90)),
    var(--wave);
  background-repeat:no-repeat;
  background-position: center bottom;
  background-size: 1200px 240px;
}
.parallax .container{position:relative; z-index:2; padding:56px 22px}
.parallax .big{font-size:28px;font-weight:1000;margin:0 0 10px;letter-spacing:-.2px}
.parallax .small{margin:0;color:var(--muted);line-height:1.85}
/* Image strips */
.strip{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:980px){.strip{grid-template-columns:1fr}}
.strip .img{
  border-radius: var(--radius2);
  border:1px solid var(--border);
  overflow:hidden;
  background: rgba(11,18,32,.02);
}
.strip .img img{width:100%;height:280px;object-fit:cover;display:block}
/* Footer */
.footer{
  padding:34px 0 46px;
  border-top:1px solid var(--border2);
  color: var(--muted);
  font-size:12px;
}
.footer a{color: var(--muted)}
.footer a:hover{color: var(--text)}

/* Marine enhancement */
.hero{
  position:relative;
}
.hero::before{
  content:"";
  position:absolute;
  left:0; right:0; top:-20px;
  height:260px;
  background: var(--wave);
  background-repeat:no-repeat;
  background-position: center top;
  background-size: 1200px 240px;
  opacity:.75;
  pointer-events:none;
}
.hero .container{position:relative; z-index:2}
.card.media{
  background:
    linear-gradient(180deg, rgba(255,255,255,.92), rgba(255,255,255,.88)),
    var(--media-img);
  background-size: cover;
  background-position:center;
}