/* 修掌柜新版营销首页 - main.css · 2026-09-01 */
/* ===================== CSS 变量 ===================== */
:root{
  --bg:#0a0e1a;
  --bg-2:#0f1424;
  --ink:#0F172A;
  --ink-2:#1E293B;
  --ink-3:#475569;
  --ink-4:#94A3B8;
  --ink-5:#CBD5E1;
  --line:#E2E8F0;
  --line-2:#F1F5F9;
  --line-soft:#F8FAFC;

  --primary:#5B6CFF;
  --primary-2:#7C8AFF;
  --primary-soft:rgba(91,108,255,.08);
  --primary-glow:rgba(91,108,255,.25);
  --green:#10B981;
  --green-2:#34D399;
  --green-soft:rgba(16,185,129,.1);
  --amber:#F59E0B;
  --amber-soft:rgba(245,158,11,.1);
  --rose:#F43F5E;
  --rose-soft:rgba(244,63,94,.1);
  --cyan:#06B6D4;
  --pink:#EC4899;

  --grad-primary:linear-gradient(135deg,#5B6CFF 0%,#9B7BFF 100%);
  --grad-green:linear-gradient(135deg,#10B981 0%,#34D399 100%);
  --grad-amber:linear-gradient(135deg,#F59E0B 0%,#FBBF24 100%);
  --grad-rose:linear-gradient(135deg,#F43F5E 0%,#FB7185 100%);
  --grad-cyan:linear-gradient(135deg,#06B6D4 0%,#22D3EE 100%);
  --grad-pink:linear-gradient(135deg,#EC4899 0%,#F472B6 100%);

  --shadow-sm:0 1px 2px rgba(15,23,42,.06);
  --shadow:0 4px 12px rgba(15,23,42,.08);
  --shadow-md:0 12px 28px rgba(15,23,42,.10);
  --shadow-lg:0 24px 60px rgba(15,23,42,.12);
  --shadow-glow:0 0 60px rgba(91,108,255,.25);

  --radius-sm:8px;
  --radius:14px;
  --radius-md:18px;
  --radius-lg:24px;

  --font-sans:'Inter','-apple-system','BlinkMacSystemFont','PingFang SC','Microsoft YaHei',sans-serif;
  --font-serif:'DM Serif Display','Songti SC',serif;
  --font-mono:'JetBrains Mono','SF Mono',monospace;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font-sans);color:var(--ink-2);background:#fff;line-height:1.65;font-size:15px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s}
a:hover{color:var(--primary)}
button{font-family:inherit;cursor:pointer;border:none;background:none}
img{user-select:none}

.container{max-width:1240px;margin:0 auto;padding:0 24px}

/* ===================== 通用 ===================== */
.sec-eyebrow{display:inline-block;font-family:var(--font-mono);font-size:11px;font-weight:600;letter-spacing:.18em;color:var(--primary);text-transform:uppercase;background:var(--primary-soft);padding:6px 14px;border-radius:99px;margin-bottom:18px}
.sec-title{font-size:42px;font-weight:800;line-height:1.18;color:var(--ink);letter-spacing:-.02em;margin-bottom:18px;font-family:var(--font-sans)}
.sec-title .grad{background:var(--grad-primary);-webkit-background-clip:text;background-clip:text;color:transparent}
.sec-sub{font-size:17px;color:var(--ink-3);line-height:1.7;max-width:720px}
.sec-head{text-align:center;margin-bottom:64px}
.sec-head .sec-eyebrow{margin-bottom:18px}
.sec-head .sec-title{margin:0 auto 18px;max-width:780px}
.sec-head .sec-sub{margin:0 auto}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;border-radius:99px;font-size:14px;font-weight:600;transition:all .25s ease;cursor:pointer;border:1.5px solid transparent;line-height:1.2;white-space:nowrap}
.btn-lg{padding:14px 26px;font-size:15px;font-weight:600}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 14px var(--primary-glow)}
.btn-primary:hover{background:var(--primary-2);transform:translateY(-1px);box-shadow:0 8px 22px var(--primary-glow)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.btn-outline{background:transparent;color:var(--ink);border-color:var(--ink-5)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-soft)}

/* ===================== Nav ===================== */
.nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.85);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid transparent;transition:border-color .25s,box-shadow .25s}
.nav.scrolled{border-bottom-color:var(--line-2);box-shadow:var(--shadow-sm)}
.nav-inner{max-width:1240px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:32px}
.nav-brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-logo{width:36px;height:36px;border-radius:9px;background:var(--grad-primary);color:#fff;font-weight:700;font-size:18px;display:grid;place-items:center;box-shadow:0 4px 14px var(--primary-glow)}
.nav-brand-text{display:flex;flex-direction:column;line-height:1.1}
.nav-brand-text b{font-size:15px;color:var(--ink);font-weight:700}
.nav-brand-text span{font-family:var(--font-mono);font-size:10px;color:var(--ink-4);letter-spacing:.06em;text-transform:uppercase}
.nav-menu{display:flex;gap:6px;flex:1}
.nav-menu a{padding:8px 14px;border-radius:8px;font-size:14px;font-weight:500;color:var(--ink-3);transition:all .2s}
.nav-menu a:hover{color:var(--ink);background:var(--line-soft)}
.nav-cta{display:flex;align-items:center;gap:12px;flex-shrink:0}
.nav-link{font-size:14px;color:var(--ink-3);padding:8px 12px;font-weight:500}
.nav-link:hover{color:var(--ink)}
.nav-btn{padding:9px 18px;border-radius:99px;font-size:14px;font-weight:600;background:var(--primary);color:#fff;box-shadow:0 4px 14px var(--primary-glow);transition:all .2s}
.nav-btn:hover{background:var(--primary-2);transform:translateY(-1px);box-shadow:0 8px 22px var(--primary-glow)}
.nav-mobile{display:none;flex-direction:column;gap:5px;padding:8px;background:none}
.nav-mobile span{display:block;width:22px;height:2px;background:var(--ink);border-radius:2px;transition:transform .25s}
body.nav-open .nav-mobile span:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.nav-open .nav-mobile span:nth-child(2){opacity:0}
body.nav-open .nav-mobile span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

@media(max-width:980px){
  .nav-menu,.nav-cta .nav-link{display:none}
  .nav-mobile{display:flex}
}

/* ===================== Reveal 动画 ===================== */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:translateY(0)}
.reveal[data-delay="1"]{transition-delay:.1s}
.reveal[data-delay="2"]{transition-delay:.2s}
.reveal[data-delay="3"]{transition-delay:.3s}

/* ===================== 通用文字渐变 ===================== */
.grad{background:var(--grad-primary);-webkit-background-clip:text;background-clip:text;color:transparent;font-weight:800}