/* ==========================================================================
   超级便签 · supernote.cloud
   气质：暖黄 / 便签纸 / 明亮 / 密文（浅色版）
   ========================================================================== */

:root{
  --bg:#fffdf6;
  --bg-warm:#fff8e6;
  --panel:#ffffff;
  --line:rgba(120,88,20,.14);
  --line-strong:rgba(120,88,20,.26);
  --ink:#2b2314;
  --ink-soft:#54462c;
  --muted:#8a7855;

  --brand:#f2a900;
  --brand-2:#ffc93c;
  --brand-deep:#b87c00;
  --amber:#ffb703;
  --amber-soft:rgba(242,169,0,.12);

  --note:#fff0bd;
  --note-2:#fffaf0;
  --note-ink:#4a3d21;

  --radius:16px;
  --max:1140px;
  --mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;overflow-x:hidden;
  font-family:var(--sans);line-height:1.7;
  color:var(--ink);
  background:
    radial-gradient(900px 520px at 82% -12%, rgba(255,201,60,.30), transparent 66%),
    radial-gradient(720px 460px at -6% 4%, rgba(255,183,3,.16), transparent 70%),
    radial-gradient(680px 480px at 52% 108%, rgba(242,169,0,.10), transparent 72%),
    var(--bg);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit}

.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.section{padding:92px 0;border-top:1px solid var(--line);background:rgba(255,255,255,.55)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,253,246,.86);
  backdrop-filter:blur(14px) saturate(150%);
  border-bottom:1px solid var(--line);
}
.site-header .wrap{display:flex;align-items:center;gap:18px;height:68px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;white-space:nowrap}
.brand-logo{
  width:36px;height:36px;flex:0 0 36px;display:block;border-radius:10px;
  box-shadow:0 4px 10px -4px rgba(184,124,0,.45), 0 0 0 1px rgba(184,124,0,.10);
}
.brand-name{font-weight:700;font-size:16.5px;letter-spacing:.02em}
.brand-sub{font-size:10.5px;letter-spacing:.22em;color:var(--muted);margin-top:-2px;text-transform:uppercase}
.nav{margin-left:auto;display:flex;gap:26px;font-size:14px}
.nav a{text-decoration:none;color:var(--ink-soft);padding:4px 0;border-bottom:1px solid transparent}
.nav a:hover{color:var(--brand-deep);border-bottom-color:var(--brand)}
.header-cta{
  font-size:13.5px;font-weight:700;text-decoration:none;white-space:nowrap;
  padding:9px 18px;border-radius:9px;color:#3a2a00;
  background:linear-gradient(160deg,#ffd24d,#ffb703);
  border:1px solid rgba(184,124,0,.28);
  box-shadow:0 10px 20px -14px rgba(184,124,0,.9);
}
.header-cta:hover{filter:brightness(1.04)}

/* ---------- hero ---------- */
.hero{padding:78px 0 88px;position:relative;overflow:hidden}
.hero .wrap{display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center}
.hero .wrap > *{min-width:0}
.kicker{
  display:inline-flex;align-items:center;gap:9px;font-size:12px;letter-spacing:.16em;
  color:var(--brand-deep);font-weight:700;text-transform:uppercase;
  padding:6px 13px;border-radius:999px;
  border:1px solid rgba(242,169,0,.36);background:rgba(255,201,60,.18);
}
.kicker i{width:6px;height:6px;border-radius:50%;background:var(--amber);box-shadow:0 0 0 4px rgba(242,169,0,.18)}
h1{
  font-size:clamp(32px,4.3vw,52px);line-height:1.16;letter-spacing:-.022em;
  margin:22px 0 20px;font-weight:800;color:var(--ink);
}
h1 em{
  font-style:normal;
  background:linear-gradient(transparent 60%, #ffe08a 60%);
  padding:0 .08em;
}
.lede{font-size:16.5px;color:var(--ink-soft);max-width:48ch;margin:0 0 30px}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 22px;border-radius:10px;font-size:15px;font-weight:700;text-decoration:none;transition:.18s ease;border:1px solid transparent}
.btn-primary{background:linear-gradient(160deg,#ffd24d,#ffb703);color:#3a2a00;border-color:rgba(184,124,0,.3);box-shadow:0 14px 26px -16px rgba(184,124,0,.95)}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.04)}
.btn-ghost{border-color:var(--line-strong);color:var(--ink);background:rgba(255,255,255,.7)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-deep)}
.hero-note{margin-top:18px;font-size:12.5px;color:var(--muted)}
.hero-note b{color:var(--ink-soft);font-weight:600}

/* ---------- 便签视觉 ---------- */
.stack{position:relative;min-height:424px}
.note{
  position:absolute;border-radius:12px;padding:18px 18px 16px;
  background:var(--note);color:var(--note-ink);
  box-shadow:0 26px 44px -24px rgba(140,105,20,.55), 0 1px 0 #fff inset;
  width:260px;border:1px solid rgba(184,124,0,.12);
}
.note h4{margin:0 0 10px;font-size:13px;letter-spacing:.02em;font-weight:700;opacity:.62}
.note ul{margin:0;padding-left:16px;font-size:13px;line-height:1.85}
.note li::marker{color:#d8a72c}
.note-a{top:0;left:0;transform:rotate(-3.2deg);z-index:3}
.note-b{top:128px;left:34px;transform:rotate(2.4deg);z-index:2;
  background:var(--note-2);color:var(--note-ink);width:238px;
  border:1px solid rgba(184,124,0,.16)}
.note-b li::marker{color:#e3bf6a}
.cipher{
  position:absolute;right:0;bottom:0;z-index:4;width:298px;
  background:linear-gradient(170deg,#fffdf4,#fff6dd);
  border:1px solid rgba(184,124,0,.28);
  border-radius:12px;padding:15px 16px;
  box-shadow:0 24px 42px -28px rgba(140,105,20,.5);
}
.cipher-head{display:flex;align-items:center;gap:8px;font-size:10.5px;letter-spacing:.18em;color:var(--brand-deep);text-transform:uppercase;margin-bottom:10px;font-weight:700}
.lock{width:11px;height:9px;border:1.5px solid currentColor;border-radius:2px;position:relative;flex:0 0 11px;margin-top:2px}
.lock::before{content:"";position:absolute;left:2px;top:-5px;width:5px;height:5px;border:1.5px solid currentColor;border-bottom:0;border-radius:3px 3px 0 0}
.cipher pre{
  margin:0;font-family:var(--mono);font-size:11px;line-height:1.85;color:#b8862c;
  overflow:hidden;white-space:pre-wrap;word-break:break-all;
}
.cipher-foot{margin-top:10px;padding-top:9px;border-top:1px dashed rgba(184,124,0,.25);font-size:11px;color:var(--muted)}

/* ---------- 卖点四栏 ---------- */
.quad{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.quad div{padding:0 22px;border-left:1px solid var(--line)}
.quad div:first-child{border-left:0;padding-left:0}
.quad b{display:block;font-size:15px;margin-bottom:7px}
.quad span{font-size:13.2px;color:var(--muted);line-height:1.7}

/* ---------- 区块标题 ---------- */
.sec-head{max-width:660px;margin-bottom:46px}
.sec-label{font-size:11.5px;letter-spacing:.2em;color:var(--brand-deep);font-weight:700;text-transform:uppercase}
.sec-head h2{font-size:clamp(24px,3vw,34px);line-height:1.3;margin:13px 0 12px;letter-spacing:-.01em;color:var(--ink)}
.sec-head p{margin:0;color:var(--muted);font-size:15px}

/* ---------- 功能卡 ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{
  position:relative;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius);padding:24px 22px;transition:.22s ease;
  box-shadow:0 14px 30px -26px rgba(140,105,20,.6);
}
.card:hover{border-color:rgba(242,169,0,.55);transform:translateY(-3px);box-shadow:0 22px 38px -28px rgba(184,124,0,.75)}
.card .ico{
  width:30px;height:30px;border-radius:8px;display:grid;place-items:center;
  background:rgba(255,201,60,.24);border:1px solid rgba(242,169,0,.36);
  font-size:14px;margin-bottom:14px;color:#8a5e00;
}
.card h3{font-size:16px;margin:0 0 8px;color:var(--ink)}
.card p{margin:0;font-size:13.6px;color:var(--muted);line-height:1.75}
.card .soon{
  position:absolute;top:18px;right:18px;font-size:10px;letter-spacing:.1em;
  color:#8a5e00;border:1px solid rgba(242,169,0,.45);background:rgba(255,201,60,.22);
  border-radius:4px;padding:1px 6px;font-weight:700;
}

/* ---------- 分栏：安全 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.claim-list{list-style:none;margin:26px 0 0;padding:0}
.claim-list li{display:flex;gap:14px;padding:13px 0;border-bottom:1px solid var(--line);font-size:14.2px;color:var(--ink-soft)}
.claim-list li:last-child{border-bottom:0}
.claim-list .mark{flex:0 0 20px;height:20px;border-radius:50%;display:grid;place-items:center;font-size:11px;background:rgba(255,201,60,.28);color:#8a5e00;border:1px solid rgba(242,169,0,.4);margin-top:3px}
.panel{
  background:linear-gradient(170deg,#fffdf3,#fff7e0);
  border:1px solid rgba(242,169,0,.28);border-radius:18px;padding:26px;
}
.panel h4{margin:0 0 16px;font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--brand-deep)}
.flow{display:grid;gap:12px}
.flow-row{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--ink-soft)}
.flow-row .dot{width:7px;height:7px;border-radius:50%;background:var(--brand);flex:0 0 7px}
.flow-row .bar{flex:1;height:6px;border-radius:3px;background:linear-gradient(90deg,rgba(242,169,0,.55),rgba(242,169,0,.10))}
.flow-row.plain .bar{background:linear-gradient(90deg,rgba(120,88,20,.16),rgba(120,88,20,.03))}
.flow-row code{font-family:var(--mono);font-size:11px;color:var(--muted)}
.panel p.small{margin:16px 0 0;font-size:11.5px;color:var(--muted);line-height:1.7}

/* ---------- 平台 ---------- */
.platforms{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.pf{
  display:flex;align-items:center;gap:16px;
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 22px;
  box-shadow:0 12px 26px -24px rgba(140,105,20,.6);
}
.pf .badge{
  width:42px;height:42px;border-radius:11px;flex:0 0 42px;display:grid;place-items:center;
  background:rgba(255,201,60,.22);border:1px solid rgba(242,169,0,.35);font-size:17px;color:#8a5e00;
}
.pf b{display:block;font-size:15px;color:var(--ink)}
.pf span{font-size:12.8px;color:var(--muted)}
.pf .state{margin-left:auto;font-size:11px;letter-spacing:.08em;color:#8a5e00;border:1px solid rgba(242,169,0,.45);background:rgba(255,201,60,.22);border-radius:5px;padding:2px 7px;white-space:nowrap;font-weight:700}

/* ---------- 关于 / 联系 ---------- */
.about-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:start}
.about-grid p{font-size:14.5px;color:var(--ink-soft);margin:0 0 14px}
.info-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.info-list li{display:flex;justify-content:space-between;gap:16px;padding:13px 0;border-bottom:1px solid var(--line);font-size:14px}
.info-list .k{color:var(--muted);font-size:13px}
.info-list .v{font-weight:500;text-align:right;color:var(--ink)}
.info-list a{color:var(--brand-deep);text-decoration:none;border-bottom:1px solid rgba(242,169,0,.5)}
.info-list a:hover{border-bottom-color:var(--brand)}
.phone-img{height:26px;width:auto;display:inline-block;vertical-align:middle;opacity:.92}
.doc .phone-img{height:24px}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);padding:40px 0 34px;background:rgba(255,248,230,.7)}
.footer-top{display:flex;flex-wrap:wrap;gap:24px;justify-content:space-between;align-items:flex-start}
.footer-brand{font-weight:700;font-size:15px;color:var(--ink)}
.footer-brand span{display:block;font-weight:400;font-size:12.5px;color:var(--muted);margin-top:5px}
.footer-links{display:flex;flex-wrap:wrap;gap:18px;font-size:13px}
.footer-links a{color:var(--ink-soft);text-decoration:none}
.footer-links a:hover{color:var(--brand-deep)}
.legal{margin-top:26px;padding-top:20px;border-top:1px dashed var(--line-strong);font-size:12.5px;color:var(--muted);line-height:2}
.legal a{color:var(--muted);text-decoration:none;border-bottom:1px solid var(--line-strong)}
.legal a:hover{color:var(--brand-deep);border-bottom-color:var(--brand)}
.legal .sep{margin:0 8px;color:var(--line-strong)}

/* ---------- 动效 ---------- */
@media (prefers-reduced-motion:no-preference){
  .reveal{opacity:0;transform:translateY(16px);animation:rise .75s cubic-bezier(.22,.8,.3,1) forwards}
  .reveal:nth-child(2){animation-delay:.07s}
  .reveal:nth-child(3){animation-delay:.14s}
  .reveal:nth-child(4){animation-delay:.21s}
  .reveal:nth-child(5){animation-delay:.28s}
  .reveal:nth-child(6){animation-delay:.35s}
  @keyframes rise{to{opacity:1;transform:none}}
  .note-a{animation:float 7s ease-in-out infinite}
  .note-b{animation:float 8s ease-in-out .8s infinite}
  @keyframes float{0%,100%{translate:0 0}50%{translate:0 -8px}}
}

/* ---------- 响应式 ---------- */
@media (max-width:980px){
  .hero .wrap{grid-template-columns:1fr;gap:44px}
  .stack{min-height:400px;max-width:460px}
  .note{width:236px}
  .note-b{left:28px}
  .cipher{width:270px}
  .cards{grid-template-columns:repeat(2,1fr)}
  .quad{grid-template-columns:1fr 1fr;gap:22px 0}
  .quad div:nth-child(3){border-left:0;padding-left:0}
  .split,.about-grid{grid-template-columns:1fr;gap:34px}
  .nav{display:none}
}
@media (max-width:640px){
  .section{padding:66px 0}
  .hero{padding:44px 0 60px}
  .cards,.platforms{grid-template-columns:1fr}
  /* 移动端改为顺序流式，避免绝对定位叠压 */
  .stack{min-height:0;max-width:none;display:grid;gap:12px}
  .note,.cipher{position:static;width:100%;right:auto;bottom:auto;transform:none}
  .note-b{width:100%}
  .cipher pre{font-size:10.5px}
  .brand-sub{display:none}
  .header-cta{padding:8px 12px;font-size:12.5px}
  .quad{grid-template-columns:1fr}
  .quad div{border-left:0;padding-left:0}
  .legal{font-size:12px}
}