/* ============================================================
   随浪工具站 · 样式
   深色底 + 亮色点缀（青绿 / 蓝）
   ============================================================ */
:root{
  --bg:#0b1220;
  --bg-soft:#0e1727;
  --card:#131f35;
  --card-2:#0f1a2c;
  --line:#213049;
  --text:#e8eefc;
  --muted:#93a5c4;
  --dim:#6c7f9e;
  --accent:#2ee6b8;
  --accent-2:#4f8dff;
  --radius:18px;
  --wrap:1140px;
  --shadow:0 24px 50px -30px rgba(0,0,0,.9);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--text);
  font:16px/1.7 -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%}
a{color:inherit;text-decoration:none}
ul{margin:0;padding:0;list-style:none}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}

/* ---------- 顶栏 ---------- */
.site-header{
  position:sticky;top:0;z-index:20;
  background:rgba(11,18,32,.82);backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid rgba(33,48,73,.7);
}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;letter-spacing:.2px}
.brand-mark{
  width:22px;height:22px;border-radius:7px;flex:none;position:relative;overflow:hidden;
  background:linear-gradient(140deg,#2ee6b8,#4f8dff);
  box-shadow:0 0 0 1px rgba(46,230,184,.25),0 6px 16px -8px rgba(46,230,184,.8);
}
.brand-mark::after{
  content:"";position:absolute;left:-10%;right:-10%;bottom:32%;height:40%;
  border-radius:50%;border-top:2px solid rgba(11,18,32,.85);border-bottom:2px solid rgba(11,18,32,.55);
  transform:rotate(-8deg);
}
.nav{display:flex;gap:6px;flex-wrap:wrap}
.nav a{font-size:14px;color:var(--muted);padding:7px 12px;border-radius:999px;transition:.18s}
.nav a:hover{color:var(--text);background:#182640}

/* ---------- 首屏 ---------- */
.hero{position:relative;overflow:hidden;padding:76px 0 40px;
  background:
    radial-gradient(900px 420px at 50% -8%,rgba(79,141,255,.26),transparent 70%),
    radial-gradient(760px 380px at 12% 6%,rgba(46,230,184,.20),transparent 68%);
}
.hero .wrap{position:relative;z-index:2;text-align:center}
.hero-badge{
  display:inline-block;margin:0 0 20px;padding:6px 16px;border-radius:999px;font-size:13px;
  color:#a9e9d7;background:rgba(46,230,184,.10);border:1px solid rgba(46,230,184,.32);
}
.hero h1{margin:0 0 18px;font-size:clamp(30px,5.2vw,52px);line-height:1.22;font-weight:800;letter-spacing:-.5px}
.hero h1 .grad{
  background:linear-gradient(100deg,#2ee6b8,#6fd7ff 45%,#4f8dff);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{margin:0 auto 30px;max-width:660px;color:var(--muted);font-size:17px}
.search{position:relative;max-width:520px;margin:0 auto}
.search input{
  width:100%;height:54px;padding:0 18px 0 48px;color:var(--text);font-size:16px;
  background:rgba(19,31,53,.9);border:1px solid var(--line);border-radius:999px;outline:none;transition:.18s;
}
.search input::placeholder{color:var(--dim)}
.search input:focus{border-color:rgba(46,230,184,.75);box-shadow:0 0 0 4px rgba(46,230,184,.12)}
.search-icon{position:absolute;left:18px;top:50%;transform:translateY(-50%);opacity:.65;font-size:15px}
.hero-stats{display:flex;justify-content:center;gap:34px;flex-wrap:wrap;margin:30px 0 0;color:var(--muted);font-size:14px}
.hero-stats li{display:flex;align-items:baseline;gap:7px}
.hero-stats b{color:var(--text);font-size:19px;font-weight:700}
.hero-wave{position:absolute;left:0;right:0;bottom:-1px;height:110px;z-index:1;opacity:.9}
.hero-wave svg{width:100%;height:100%;display:block}
.hero-wave path{fill:var(--bg-soft)}

/* ---------- 区块 ---------- */
.section{padding:56px 0}
.section:nth-of-type(even){background:var(--bg-soft)}
.section-head{margin-bottom:26px}
.section-head h2{display:flex;align-items:center;gap:12px;margin:0 0 6px;font-size:24px;letter-spacing:.2px}
.section-head .bar{width:6px;height:22px;border-radius:4px;background:linear-gradient(180deg,#2ee6b8,#4f8dff)}
.section-head p{margin:0;color:var(--dim);font-size:14px}

/* ---------- 工具卡片 ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(330px,100%),1fr));gap:22px}
.grid>*{min-width:0}
.card{
  display:flex;flex-direction:column;overflow:hidden;border-radius:var(--radius);
  background:linear-gradient(180deg,var(--card),var(--card-2));
  border:1px solid var(--line);box-shadow:var(--shadow);transition:transform .2s,border-color .2s,box-shadow .2s;
}
.card:hover{transform:translateY(-4px);border-color:var(--accent);
  box-shadow:0 26px 54px -26px color-mix(in srgb,var(--accent) 55%,transparent)}
.card-cover{position:relative;display:block;aspect-ratio:16/9;background:#0a1120;overflow:hidden}
.card-cover img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .35s}
.card:hover .card-cover img{transform:scale(1.035)}
.card-icon{
  position:absolute;left:14px;bottom:14px;width:38px;height:38px;border-radius:12px;font-size:19px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(11,18,32,.78);border:1px solid rgba(255,255,255,.12);backdrop-filter:blur(6px);
}
.card-body{display:flex;flex-direction:column;gap:12px;padding:18px 20px 20px;flex:1}
.card-title{margin:0;font-size:19px;line-height:1.4}
.card-title a:hover{color:var(--accent)}
.card-tagline{margin:0;color:var(--muted);font-size:14.5px}
.card-list{display:flex;flex-direction:column;gap:6px;font-size:13.5px;color:var(--dim)}
.card-list li{position:relative;padding-left:18px}
.card-list li::before{content:"";position:absolute;left:2px;top:.62em;width:6px;height:6px;border-radius:50%;
  background:var(--accent);opacity:.85}
.card-tags{display:flex;flex-wrap:wrap;gap:8px}
.tag{font-size:12px;padding:3px 10px;border-radius:999px;color:#a9bcdd;background:#18233b;border:1px solid #24314e}
.card-cta{margin-top:auto;padding-top:4px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.card-host{font-size:12px;color:var(--dim);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;overflow-wrap:anywhere}
.ad-slot{margin:6px 0;min-height:0}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:999px;
  font-size:14.5px;font-weight:600;color:#062018;
  background:linear-gradient(135deg,#2ee6b8,#5fd8ff 60%,#4f8dff);
  transition:.18s;border:1px solid transparent;
}
.btn:hover{filter:brightness(1.08);transform:translateY(-1px)}
.btn-ghost{color:var(--text);background:transparent;border-color:var(--line)}
.btn-ghost:hover{background:#182640}

/* ---------- 卖点 ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(240px,100%),1fr));gap:18px}
.feature{padding:22px;border-radius:var(--radius);background:var(--card);border:1px solid var(--line)}
.feature span{font-size:24px}
.feature h3{margin:10px 0 6px;font-size:17px}
.feature p{margin:0;color:var(--muted);font-size:14.5px}

/* ---------- 预告 ---------- */
.mini-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(260px,100%),1fr));gap:16px}
.mini{display:flex;align-items:center;gap:14px;padding:18px 20px;border-radius:14px;
  background:var(--card);border:1px dashed #2b3d5e}
.mini-icon{font-size:22px}
.mini b{display:block;font-size:16px}
.mini span{color:var(--dim);font-size:13.5px}

/* ---------- 常见问题 ---------- */
.faq{display:flex;flex-direction:column;gap:12px;max-width:840px}
.faq-item{border:1px solid var(--line);border-radius:14px;background:var(--card);overflow:hidden}
.faq-item summary{cursor:pointer;padding:16px 20px;font-size:16px;font-weight:600;list-style:none;position:relative}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"＋";position:absolute;right:20px;color:var(--dim);font-weight:400}
.faq-item[open] summary::after{content:"－"}
.faq-body{padding:0 20px 18px}
.faq-body p{margin:0;color:var(--muted);font-size:15px}

/* ---------- 关于 ---------- */
.about{max-width:800px;color:var(--muted);font-size:15px}
.about p{margin:0 0 14px}
.about-list li{padding-left:16px;position:relative;color:var(--dim);font-size:14.5px;margin-bottom:4px}
.about-list li::before{content:"·";position:absolute;left:4px;color:var(--accent);font-weight:700}
.about a{color:var(--accent)}

/* ---------- 页脚 ---------- */
.support{
  display:flex;align-items:center;gap:34px;flex-wrap:wrap;padding:26px 28px;
  border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(180deg,var(--card),var(--card-2));
}
.support-text{flex:1 1 320px}
.support-lead{margin:0 0 10px;font-size:17px}
.support-note{margin:0;color:var(--dim);font-size:14px}
.support-codes{display:flex;gap:18px;flex-wrap:wrap}
.pay-card{margin:0;text-align:center}
.pay-card img{
  display:block;height:238px;width:auto;border-radius:14px;background:#fff;
  border:1px solid var(--line);box-shadow:0 14px 30px -22px rgba(0,0,0,.9);
}
.pay-card figcaption{margin-top:9px;font-size:13px;color:var(--muted)}

.site-footer{margin-top:40px;background:#080e19;border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:26px;padding:44px 20px 26px}
.footer-tagline{color:var(--dim);font-size:14px;margin:12px 0 0}
.site-footer h4{margin:0 0 12px;font-size:14px;color:var(--text);letter-spacing:.4px}
.site-footer li{margin-bottom:8px}
.site-footer li a{color:var(--muted);font-size:14px}
.site-footer li a:hover{color:var(--accent)}
.footer-bottom{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  padding:16px 20px 34px;color:var(--dim);font-size:13px;border-top:1px solid rgba(33,48,73,.6)}

/* ---------- 404 ---------- */
.err{text-align:center;padding:80px 20px 90px}
.err-code{margin:0;font-size:64px;font-weight:800;
  background:linear-gradient(120deg,#2ee6b8,#4f8dff);-webkit-background-clip:text;background-clip:text;color:transparent}
.err h1{margin:6px 0 12px;font-size:26px}
.err p{color:var(--muted);margin:0 0 24px}
.tools-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:26px}

/* ---------- 手机 ---------- */
@media (max-width:720px){
  .hero{padding:52px 0 30px}
  .hero-stats{gap:20px;font-size:13px}
  .hero-stats b{font-size:17px}
  .site-header .wrap{height:auto;padding-top:10px;padding-bottom:10px;flex-direction:column;gap:8px}
  .nav{justify-content:center;width:100%}
  .footer-grid{grid-template-columns:1fr;padding:34px 20px 20px}
  .section{padding:44px 0}
}