/* ============ 易盾官网 · Light design system ============ */
:root{
  --bg:#f6f9fe;
  --bg-soft:#eef4ff;
  --surface:#ffffff;
  --surface-2:#f8fbff;
  --ink:#0e1e38;
  --text:#182941;
  --muted:#6b7d98;
  --line:#e2eaf5;
  --line-strong:#d2dfef;
  --blue:#2563eb;
  --blue-2:#4f8cff;
  --cyan:#06b6d4;
  --mint:#0fbfa5;
  --amber:#f59e0b;
  --danger:#e5484d;
  --radius:18px;
  --shadow:0 20px 60px rgba(24,52,96,.10);
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:"SFMono-Regular",ui-monospace,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--text);font-family:var(--font);line-height:1.65;
  background:
    radial-gradient(900px 520px at 12% -8%, rgba(37,99,235,.10), transparent 60%),
    radial-gradient(760px 500px at 88% -4%, rgba(6,182,212,.10), transparent 58%),
    var(--bg);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.container{width:min(1200px,92vw);margin:0 auto}
.muted{color:var(--muted)}
.brand-text{background:linear-gradient(100deg,var(--blue) 0%,#3b82f6 45%,var(--cyan) 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
::selection{background:rgba(37,99,235,.16);color:var(--ink)}

/* header */
.yd-header{position:sticky;top:0;z-index:80;background:rgba(255,255,255,.82);backdrop-filter:blur(18px) saturate(150%);border-bottom:1px solid rgba(226,234,245,.9)}
.yd-nav{display:flex;align-items:center;height:70px;gap:34px}
.yd-logo{display:flex;align-items:center;gap:11px;font-weight:800;font-size:19px;letter-spacing:.2px;color:var(--ink);white-space:nowrap}
.yd-logo .mark{width:36px;height:36px;border-radius:11px;display:grid;place-items:center;background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;font-size:19px;box-shadow:0 8px 20px rgba(37,99,235,.25)}
.yd-links{display:flex;gap:30px;font-size:14px;color:#50627c}
.yd-links a{position:relative;padding:6px 0;transition:color .2s}
.yd-links a:after{content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--blue),var(--cyan));transition:right .25s}
.yd-links a:hover{color:var(--blue)}
.yd-links a:hover:after{right:0}
.yd-nav-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.yd-menu-btn{display:none;background:none;border:0;color:var(--ink);font-size:22px;padding:6px;cursor:pointer}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:42px;padding:0 20px;border-radius:11px;font-size:14px;font-weight:600;border:1px solid var(--line-strong);background:#fff;color:var(--ink);cursor:pointer;transition:transform .18s,border-color .18s,box-shadow .18s;white-space:nowrap}
.btn:hover{transform:translateY(-1px);border-color:#b9d2f8;box-shadow:0 10px 24px rgba(32,71,130,.09)}
.btn-primary{background:linear-gradient(120deg,var(--blue),#3b82f6 55%,var(--cyan));border:0;color:#fff;box-shadow:0 12px 28px rgba(37,99,235,.24)}
.btn-primary:hover{box-shadow:0 16px 34px rgba(37,99,235,.3)}
.btn-ghost{background:transparent;border-color:transparent;color:#43546d}
.btn-ghost:hover{background:#eef4fd;box-shadow:none}
.btn-lg{height:50px;padding:0 26px;font-size:15px;border-radius:12px}

/* hero */
.hero{position:relative;padding:92px 0 46px;overflow:hidden}
.hero:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(37,99,235,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(37,99,235,.045) 1px,transparent 1px);background-size:56px 56px;mask-image:radial-gradient(ellipse 75% 65% at 50% 25%,#000 30%,transparent 78%);pointer-events:none}
.hero:after{content:"";position:absolute;width:520px;height:520px;border-radius:50%;background:rgba(37,99,235,.10);filter:blur(110px);right:-120px;top:-160px;pointer-events:none}
.hero-grid{position:relative;display:grid;grid-template-columns:1.04fr .96fr;gap:60px;align-items:center;z-index:1}
.badge{display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 13px;border:1px solid #cfe0fb;background:#eaf2ff;border-radius:999px;font-size:12px;color:#1e5bd7;letter-spacing:.3px;margin-bottom:24px}
.badge .dot{width:6px;height:6px;border-radius:50%;background:var(--mint);box-shadow:0 0 8px rgba(15,191,165,.6)}
.hero h1{font-size:clamp(38px,4.8vw,62px);line-height:1.06;margin:0 0 22px;letter-spacing:-2px;font-weight:800;color:var(--ink)}
.hero p.lead{font-size:17px;color:#536782;max-width:560px;margin:0 0 30px;line-height:1.8}
.hero-actions{display:flex;gap:13px;flex-wrap:wrap;margin-bottom:34px}
.hero-meta{display:flex;color:var(--muted);font-size:12.5px}
.hero-meta>div{padding:0 26px;border-left:1px solid var(--line)}
.hero-meta>div:first-child{padding-left:0;border-left:0}
.hero-meta b{display:block;color:var(--ink);font-size:22px;font-weight:800;letter-spacing:-.5px;line-height:1.3}

/* hero visual */
.hero-visual{position:relative;perspective:1400px}
.app-window{position:relative;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 30px 80px rgba(24,52,96,.16),0 2px 6px rgba(24,52,96,.04);overflow:hidden;transform:rotateY(-5deg) rotateX(2deg);transform-origin:left center}
.terminal-top{display:flex;align-items:center;gap:7px;padding:13px 16px;border-bottom:1px solid var(--line);background:#fbfdff}
.terminal-top i{width:9px;height:9px;border-radius:50%;background:#ff5f57;display:block}
.terminal-top i:nth-child(2){background:#febc2e}
.terminal-top i:nth-child(3){background:#28c840}
.terminal-top .win-title{margin-left:8px;font-family:var(--mono);font-size:11px;color:#8a9ab0;letter-spacing:.4px}
.app-body{display:grid;grid-template-columns:132px 1fr;min-height:330px}
.app-side{border-right:1px solid var(--line);padding:16px 10px;background:#f8fbff}
.app-side .s-brand{font-family:var(--mono);font-size:10px;color:#93a3b8;letter-spacing:1.4px;padding:0 8px 12px}
.app-nav-item{display:flex;align-items:center;gap:8px;height:32px;padding:0 9px;border-radius:8px;font-size:11.5px;color:#7386a0;margin-bottom:3px}
.app-nav-item .layui-icon{font-size:14px}
.app-nav-item.on{background:#e8f1ff;color:#1f5fd0;font-weight:600;box-shadow:inset 2px 0 0 var(--blue)}
.app-main{padding:18px 20px}
.app-headline{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.app-headline b{font-size:13px;color:var(--ink)}
.app-headline span{font-family:var(--mono);font-size:10px;color:#93a3b8}
.metric-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:14px}
.metric{background:#f8fbff;border:1px solid var(--line);border-radius:9px;padding:9px 10px}
.metric small{display:block;font-size:9.5px;color:#8393a9;letter-spacing:.3px}
.metric b{font-size:16px;font-weight:800;letter-spacing:-.5px;color:var(--ink)}
.metric b em{font-style:normal;font-size:10px;color:var(--blue);margin-left:4px}
.code-box{background:#0e1e38;border-radius:10px;padding:13px;font-family:var(--mono);font-size:10.5px;line-height:1.85;color:#b9c9dd;white-space:pre-wrap;box-shadow:inset 0 0 0 1px rgba(255,255,255,.04)}
.code-box .c{color:#7d90a8}
.code-box .g{color:#5ef2c8}
.code-box .b{color:#9db4ff}
.code-box .w{color:#ffc46b}
.float-card{position:absolute;background:rgba(255,255,255,.96);border:1px solid var(--line);border-radius:12px;padding:10px 13px;box-shadow:0 18px 40px rgba(24,52,96,.14);backdrop-filter:blur(10px);font-size:10.5px;color:#536782;display:flex;align-items:center;gap:9px;animation:float 6s ease-in-out infinite}
.float-card .layui-icon{font-size:16px}
.float-a{right:-14px;top:54px;animation-delay:-1s}
.float-b{left:-18px;bottom:38px;animation-delay:-3s}
.float-card b{display:block;color:var(--ink);font-size:10.5px}
.float-card span{display:block;color:#8999ad;font-size:9.5px}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}

/* trust */
.trust-strip{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin-top:34px;padding-top:18px;border-top:1px solid var(--line)}
.trust-strip .label{font-size:11px;letter-spacing:1.6px;color:#93a3b8;font-family:var(--mono);margin-right:4px}
.chip{display:inline-flex;align-items:center;height:27px;padding:0 11px;border:1px solid var(--line);border-radius:999px;font-size:11.5px;color:#5b6e89;background:#fff}
.notice-bar{display:flex;gap:10px;align-items:center;border:1px solid var(--line);background:#fff;border-radius:11px;padding:10px 14px;font-size:13px;color:#536782;margin-top:24px;box-shadow:0 6px 18px rgba(24,52,96,.04)}
.notice-bar .tag{font-size:10px;color:#fff;background:linear-gradient(120deg,var(--blue),var(--cyan));padding:2px 8px;border-radius:6px;font-weight:800;letter-spacing:.5px;white-space:nowrap}

/* sections */
.section{padding:86px 0}
.section-head{max-width:700px;margin-bottom:40px}
.section-head .eyebrow{display:block;font-family:var(--mono);font-size:11px;letter-spacing:2px;color:var(--blue);margin-bottom:12px;text-transform:uppercase}
.section-head h2{font-size:clamp(27px,3.1vw,40px);margin:0 0 12px;letter-spacing:-1.2px;line-height:1.2;color:var(--ink)}
.section-head p{color:var(--muted);margin:0;font-size:15px;line-height:1.8}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;counter-reset:f}
.feature{position:relative;background:#fff;border:1px solid var(--line);border-radius:15px;padding:24px;transition:transform .22s,border-color .22s,box-shadow .22s;box-shadow:0 6px 18px rgba(24,52,96,.035);overflow:hidden}
.feature:hover{transform:translateY(-5px);border-color:#bfd6f8;box-shadow:0 20px 44px rgba(30,80,160,.12)}
.feature .ico{position:relative;width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(145deg,#e8f1ff,#e6fbff);color:var(--blue);font-size:20px;margin-bottom:15px}
.feature h3{position:relative;margin:0 0 8px;font-size:15.5px;color:var(--ink);letter-spacing:-.2px}
.feature p{position:relative;margin:0;color:var(--muted);font-size:12.5px;line-height:1.75}
.grid-4 .feature:after{counter-increment:f;content:"0" counter(f);position:absolute;right:16px;top:14px;font-family:var(--mono);font-size:10px;color:#b7c4d6}

/* split */
.split-grid{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.split-checks{list-style:none;padding:0;margin:0 0 24px}
.split-checks li{padding:7px 0;color:#4f637d;font-size:13px}
.split-checks li:before{content:"✓";color:var(--mint);margin-right:9px;font-weight:700}
.split-panel{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:var(--shadow);font-family:var(--mono);font-size:12px}
.panel-head{display:flex;justify-content:space-between;padding-bottom:14px;border-bottom:1px solid var(--line);color:#8b9bb0;font-size:10.5px;letter-spacing:.6px}
.panel-head .ok{color:#0f9e88}
.file-row{display:flex;align-items:center;gap:10px;padding:12px 0;border-bottom:1px dashed #edf2f9;color:#3f5470}
.file-row .layui-icon{color:var(--blue);font-size:14px}
.file-row em{margin-left:auto;font-style:normal;color:#8b9bb0;font-size:10.5px}
.panel-foot{padding-top:14px;color:#7386a0;font-size:10.5px;display:flex;align-items:center;gap:7px}
.panel-foot .dot{width:6px;height:6px;border-radius:50%;background:var(--mint);box-shadow:0 0 8px rgba(15,191,165,.5)}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.step{position:relative;border:1px solid var(--line);border-radius:15px;padding:22px;background:#fff;box-shadow:0 6px 18px rgba(24,52,96,.035)}
.step b{display:block;font-family:var(--mono);font-size:10.5px;color:var(--blue);letter-spacing:1px;margin-bottom:10px}
.step h3{margin:0 0 7px;font-size:15.5px;color:var(--ink)}
.step p{margin:0;color:var(--muted);font-size:12.5px;line-height:1.7}

/* plans */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;align-items:stretch}
.plan{position:relative;border:1px solid var(--line);border-radius:18px;padding:30px;background:#fff;display:flex;flex-direction:column;transition:transform .22s,border-color .22s,box-shadow .22s;box-shadow:0 6px 18px rgba(24,52,96,.035)}
.plan:hover{transform:translateY(-4px);border-color:#bfd6f8;box-shadow:0 20px 48px rgba(30,80,160,.10)}
.plan.featured{border-color:rgba(37,99,235,.45);background:linear-gradient(180deg,#f2f7ff,#fff);box-shadow:0 20px 50px rgba(37,99,235,.12)}
.plan.featured:after{content:"推荐";position:absolute;top:20px;right:20px;font-size:10px;letter-spacing:1px;padding:4px 10px;border-radius:999px;background:linear-gradient(120deg,var(--blue),var(--cyan));color:#fff;font-weight:800}
.plan .pname{font-size:15px;font-weight:700;color:#31445f}
.plan .price{font-size:40px;font-weight:800;margin:12px 0 2px;letter-spacing:-1.5px;line-height:1;color:var(--ink)}
.plan .price small{font-size:12px;color:var(--muted);font-weight:500;letter-spacing:0}
.plan .pdesc{color:var(--muted);font-size:12.5px;margin:10px 0 20px;min-height:38px}
.plan ul{list-style:none;padding:0;margin:0 0 24px;flex:1}
.plan li{padding:6px 0;font-size:12.5px;color:#4f637d;border-bottom:1px dashed #edf2f9}
.plan li:before{content:"✓";color:var(--mint);margin-right:8px;font-size:11px;font-weight:700}
.plan .btn{width:100%}

/* ai */
.ai-box{position:relative;border:1px solid #d9e7ff;background:linear-gradient(120deg,#eff6ff,#f0fdff);border-radius:20px;padding:34px;overflow:hidden}
.ai-box:before{content:"";position:absolute;width:420px;height:420px;border-radius:50%;background:rgba(79,140,255,.12);filter:blur(90px);right:-120px;top:-160px}
.ai-list{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:24px;position:relative}
.ai-item{padding:18px;border-radius:12px;background:rgba(255,255,255,.72);border:1px solid #e0ebfb}
.ai-item h4{margin:0 0 6px;font-size:13.5px;color:var(--ink)}
.ai-item p{margin:0;font-size:12px;color:#5d7089;line-height:1.7}

/* cta */
.cta{position:relative;margin:12px 0 84px;border-radius:22px;padding:46px 48px;background:linear-gradient(120deg,#2563eb,#3b82f6 55%,#06b6d4);color:#fff;display:flex;align-items:center;justify-content:space-between;gap:24px;overflow:hidden;box-shadow:0 24px 60px rgba(37,99,235,.22)}
.cta:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px);background-size:34px 34px;mask-image:linear-gradient(90deg,#000,transparent 75%)}
.cta h2{margin:0 0 6px;font-size:27px;letter-spacing:-.8px}
.cta p{margin:0;color:rgba(255,255,255,.82)}
.cta .btn{position:relative;background:#fff;color:var(--blue);border:0}

/* footer */
.footer{border-top:1px solid var(--line);padding:52px 0 30px;color:#6b7d98;font-size:12.5px;background:#eef4fc}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:34px}
.footer h4{color:#33465f;font-size:13px;margin:0 0 12px;letter-spacing:.3px}
.footer a{display:block;padding:4px 0;transition:color .18s}
.footer a:hover{color:var(--blue)}
.footer-bottom{margin-top:34px;padding-top:18px;border-top:1px solid #dde7f4;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;font-size:12px}
.footer .yd-logo{font-size:17px;margin-bottom:12px}

/* auth */
.auth-wrap{min-height:100vh;display:grid;grid-template-columns:1.02fr .98fr;background:#fff}
.auth-side{position:relative;padding:56px 60px;display:flex;flex-direction:column;justify-content:space-between;background:
  radial-gradient(600px 400px at 90% 10%,rgba(255,255,255,.18),transparent 60%),
  linear-gradient(145deg,#1d4ed8,#2563eb 45%,#06b6d4);color:#fff;overflow:hidden}
.auth-side:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px);background-size:46px 46px;mask-image:radial-gradient(ellipse at 30% 20%,#000,transparent 70%)}
.auth-side>*{position:relative}
.auth-side .yd-logo{color:#fff}
.auth-side .yd-logo .mark{background:rgba(255,255,255,.18);box-shadow:none;border:1px solid rgba(255,255,255,.3)}
.auth-side h2{font-size:36px;line-height:1.22;margin:30px 0 14px;max-width:460px;letter-spacing:-1.3px}
.auth-side p{color:rgba(255,255,255,.82);max-width:420px}
.auth-side ul{list-style:none;padding:0;margin:28px 0 0}
.auth-side li{padding:6px 0;color:rgba(255,255,255,.9);font-size:13.5px}
.auth-side li:before{content:"✓";color:#7ff5dd;margin-right:9px}
.auth-main{display:grid;place-items:center;padding:40px;background:#f7faff}
.auth-card{width:min(430px,100%);background:#fff;border:1px solid var(--line);border-radius:20px;padding:36px;box-shadow:var(--shadow)}
.auth-card h1{margin:0 0 6px;font-size:25px;letter-spacing:-.6px;color:var(--ink)}
.auth-card .sub{color:var(--muted);font-size:13px;margin-bottom:24px}
.auth-card .layui-input{height:46px;background:#fbfdff;border-color:#dbe6f4;color:var(--text);border-radius:10px;padding-left:14px}
.auth-card .layui-input:focus{border-color:rgba(37,99,235,.55)}
.auth-card .layui-form-label{display:none}
.auth-card .layui-input-block{margin-left:0}
.auth-card .layui-form-item{margin-bottom:14px}
.auth-card .btn-primary{width:100%;height:46px}
.auth-foot{text-align:center;font-size:12.5px;color:var(--muted);margin-top:18px}
.alert{border-radius:10px;padding:10px 13px;font-size:12.5px;margin-bottom:16px}
.alert-error{background:#fff1f2;border:1px solid #ffd3d8;color:#c93d55}
.alert-ok{background:#ecfdf7;border:1px solid #bdeee4;color:#0a8e78}

/* docs / faq */
.docs-grid{display:grid;grid-template-columns:220px 1fr;gap:38px}
.docs-nav{position:sticky;top:96px;align-self:start;border:1px solid var(--line);border-radius:14px;padding:18px;background:#fff;box-shadow:0 6px 18px rgba(24,52,96,.035)}
.docs-nav a{display:block;padding:7px 0;color:var(--muted);font-size:12.5px;transition:color .18s}
.docs-nav a:hover{color:var(--blue)}
.docs-body section{margin-bottom:38px;scroll-margin-top:100px}
.docs-body h2{font-size:21px;margin:0 0 10px;letter-spacing:-.4px;color:var(--ink)}
.docs-body pre{background:#0e1e38;border-radius:12px;padding:16px;overflow:auto;font-size:12px;line-height:1.8;color:#c4d3e6}
.docs-body code{font-family:var(--mono)}
.docs-body p,.docs-body li{color:#4f637d;font-size:13.5px}
.faq-item{border:1px solid var(--line);border-radius:13px;margin-bottom:10px;background:#fff;transition:border-color .2s;box-shadow:0 4px 14px rgba(24,52,96,.03)}
.faq-item.open{border-color:#bfd6f8}
.faq-q{padding:17px 19px;cursor:pointer;font-weight:600;display:flex;justify-content:space-between;gap:12px;font-size:14px;color:var(--ink)}
.faq-a{padding:0 19px 17px;color:var(--muted);font-size:13px;display:none;line-height:1.8}
.faq-item.open .faq-a{display:block}

@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:48px}
  .hero-visual{max-width:680px}
  .app-window{transform:none}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr}
}
@media (max-width:960px){
  .auth-wrap{grid-template-columns:1fr}
  .auth-side{display:none}
  .yd-links{display:none}
  .yd-menu-btn{display:block}
  body.menu-open .yd-links{display:flex;position:absolute;top:70px;left:0;right:0;flex-direction:column;gap:0;background:#fff;border-bottom:1px solid var(--line);padding:12px 6vw 18px;z-index:70;box-shadow:0 30px 60px rgba(24,52,96,.12)}
  body.menu-open .yd-links a{padding:13px 0;border-bottom:1px solid #eef3fa;font-size:15px}
  .grid-3,.plans,.steps,.ai-list{grid-template-columns:1fr 1fr}
  .split-grid{grid-template-columns:1fr;gap:32px}
  .cta{flex-direction:column;align-items:flex-start}
}
@media (max-width:680px){
  .hero{padding-top:54px}
  .hero-meta{flex-wrap:wrap}
  .hero-meta>div{padding:0 18px}
  .grid-3,.grid-4,.plans,.steps,.ai-list,.footer-grid{grid-template-columns:1fr}
  .app-body{grid-template-columns:1fr}
  .app-side{display:none}
  .float-card{display:none}
  .section{padding:62px 0}
  .footer-bottom{flex-direction:column}
}