*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --brand:#285cfe;
  --brand-dark:#18283d;
  --bg:#ffffff;
  --bg2:#f5f8fc;
  --bg3:#eef3fb;
  --glass:#ffffff;
  --glass-h:#f8fafd;
  --border:rgba(24,40,61,0.10);
  --border-h:rgba(24,40,61,0.18);
  --t1:#18283d;
  --t2:rgba(24,40,61,0.68);
  --t3:rgba(24,40,61,0.42);
  --blue:#285cfe;
  --green:#16a34a;
  --danger:#dc2626;
  --grad:linear-gradient(135deg,#4a74ff 0%,#285cfe 50%,#1a4ad9 100%);
  --brand-soft:rgba(40,92,254,0.08);
  --brand-glow:rgba(40,92,254,0.28);
  --shadow:0 8px 30px rgba(24,40,61,0.06);
  --shadow-lg:0 16px 48px rgba(24,40,61,0.08);
  --r:16px;--r2:24px;--r3:32px;
  /* 大陆屏蔽 Google Fonts，一律用系统字体 */
  --font:-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei','Hiragino Sans GB','Segoe UI',sans-serif;
}
html{scroll-behavior:smooth}
body{
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(40,92,254,0.10), transparent 55%),
    linear-gradient(180deg, #ffffff 0%, #f5f8fc 45%, #eef3fb 100%);
  background-attachment:fixed;
  color:var(--t1);
  font-family:var(--font);
  font-size:16px;
  line-height:1.6;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
h1,h2,h3{font-weight:700;letter-spacing:-.2px;color:var(--t1)}
.grad-text{background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.glass{
  background:rgba(255,255,255,0.86);
  backdrop-filter:blur(16px) saturate(160%);
  -webkit-backdrop-filter:blur(16px) saturate(160%);
  border:1px solid var(--border);
  box-shadow:var(--shadow);
}
.inner{max-width:1160px;margin:0 auto;padding:0 24px}
.hidden{display:none !important}

/* NAV */
nav{position:fixed;top:0;left:0;right:0;height:72px;z-index:900;display:flex;align-items:center;padding:0 32px;transition:all .3s}
nav.scrolled{background:rgba(255,255,255,0.9);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border);box-shadow:0 4px 20px rgba(24,40,61,0.04)}
.nav-logo{display:flex;align-items:center;line-height:0}
.nav-logo-img{height:30px;width:auto;display:block}
.footer-logo-img{height:28px;width:auto;display:block;margin:0 auto}
.nav-links{flex:1;display:flex;justify-content:center;gap:34px}
.nav-link{color:var(--t2);font-size:14px;font-weight:500;transition:color .2s}
.nav-link:hover,.nav-link.active{color:var(--brand)}
.nav-link.active{font-weight:700}
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:40px;height:40px;margin-left:auto;margin-right:8px;padding:8px;border:1px solid var(--border);border-radius:12px;background:var(--glass);cursor:pointer}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--t1);border-radius:1px;margin:0 auto;transition:transform .2s,opacity .2s}
nav.menu-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
nav.menu-open .nav-toggle span:nth-child(2){opacity:0}
nav.menu-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto}
.btn-nav{background:var(--grad);color:#fff;border:none;border-radius:20px;padding:9px 20px;font-size:14px;font-weight:600;cursor:pointer;font-family:var(--font);transition:all .2s;box-shadow:0 6px 18px var(--brand-glow)}
.btn-nav:hover{opacity:.92;transform:translateY(-1px)}
.btn-ghost-sm{background:#fff;color:var(--t1);border:1px solid var(--border);border-radius:20px;padding:9px 18px;font-size:14px;font-weight:500;cursor:pointer;font-family:var(--font);transition:all .2s}
.btn-ghost-sm:hover{background:var(--bg2);border-color:var(--border-h)}
.user-chip{display:flex;align-items:center;gap:8px;padding:7px 14px;border-radius:20px;background:#fff;border:1px solid var(--border);font-size:13px;color:var(--t1);cursor:pointer}
.user-chip .dot{width:7px;height:7px;border-radius:50%;background:var(--green)}

/* HERO */
#hero{position:relative;min-height:auto;display:flex;align-items:center;justify-content:center;text-align:center;padding:110px 24px 36px;overflow:hidden}
#hero::before{content:'';position:absolute;top:-10%;left:50%;transform:translateX(-50%);width:980px;height:980px;background:radial-gradient(circle,rgba(40,92,254,0.16),transparent 62%);pointer-events:none}
#hero::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(255,255,255,0.35) 0%,transparent 40%,rgba(245,248,252,0.6) 100%);pointer-events:none}
.hero-content{position:relative;z-index:2;max-width:860px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 16px;border-radius:20px;background:var(--brand-soft);border:1px solid rgba(40,92,254,0.22);font-size:12px;font-weight:700;color:var(--blue);letter-spacing:.6px;margin-bottom:28px}
.badge-dot{width:6px;height:6px;border-radius:50%;background:var(--blue);animation:blink 2s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.4}}
.hero-h1{font-size:clamp(36px,5.8vw,64px);line-height:1.12;margin-bottom:18px}
.hero-value{font-size:clamp(20px,3vw,32px);font-weight:700;line-height:1.35;margin:0 auto 24px;max-width:720px}
.hero-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:18px}
.hero-sub{font-size:clamp(15px,1.8vw,17px);color:var(--t2);max-width:640px;margin:0 auto;line-height:1.75}
.btn-primary{background:var(--grad);color:#fff;border:none;border-radius:28px;padding:15px 34px;font-size:16px;font-weight:700;cursor:pointer;font-family:var(--font);display:inline-flex;align-items:center;gap:8px;box-shadow:0 10px 28px var(--brand-glow);transition:all .25s}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 36px rgba(40,92,254,0.38)}
.btn-ghost{background:rgba(255,255,255,0.8);color:var(--t1);border:1px solid var(--border);border-radius:28px;padding:15px 34px;font-size:16px;font-weight:600;cursor:pointer;font-family:var(--font);transition:all .25s;box-shadow:var(--shadow)}
.btn-ghost:hover{background:#fff;border-color:var(--border-h);transform:translateY(-2px)}

/* METRICS */
#metrics{padding:12px 0 28px;margin-top:0}
.metric-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.metric-card{padding:22px 20px;border-radius:var(--r2);text-align:center}
.metric-value{font-size:clamp(32px,4vw,44px);font-weight:800;letter-spacing:-1px;color:var(--blue);line-height:1.1}
.metric-unit{font-size:0.55em;font-weight:700;margin-left:2px}
.metric-label{margin-top:10px;font-size:15px;color:var(--t2);line-height:1.5}

/* TESTIMONIALS */
#testimonials{padding:12px 0 56px;overflow:hidden}
.testi-track{display:flex;flex-direction:column;gap:16px;mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);-webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.testi-row{display:flex;gap:16px;width:max-content;animation:testi-scroll 48s linear infinite}
.testi-row--reverse{animation-direction:reverse;animation-duration:54s}
.testi-bubble{
  flex:0 0 auto;
  max-width:340px;
  padding:14px 18px 14px 20px;
  border-radius:18px 18px 18px 6px;
  background:#fff;
  border:1px solid var(--border);
  box-shadow:var(--shadow);
  font-size:15px;
  line-height:1.65;
  color:var(--t1);
  position:relative;
}
.testi-bubble::after{
  content:'';
  position:absolute;
  left:14px;
  bottom:-7px;
  width:12px;
  height:12px;
  background:#fff;
  border-left:1px solid var(--border);
  border-bottom:1px solid var(--border);
  transform:rotate(-45deg);
}
@keyframes testi-scroll{
  from{transform:translateX(0)}
  to{transform:translateX(-50%)}
}
@media(prefers-reduced-motion:reduce){
  .testi-row{animation:none;flex-wrap:wrap;width:auto;justify-content:center;padding:0 24px}
  .testi-bubble[aria-hidden="true"]{display:none}
}

/* SECTIONS */
section{padding:90px 0}
.sec-head{text-align:center;max-width:640px;margin:0 auto 56px}
.sec-label{font-size:11px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--blue);margin-bottom:14px}
.sec-h2{font-size:clamp(30px,4.5vw,48px);line-height:1.15;margin-bottom:14px}
.sec-desc{font-size:17px;color:var(--t2);line-height:1.7}

/* FEATURES */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feat-card{padding:30px;border-radius:var(--r2)}
.feat-ic{width:46px;height:46px;border-radius:12px;background:var(--brand-soft);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:800;letter-spacing:.04em;color:var(--blue);margin-bottom:18px;font-variant-numeric:tabular-nums}
.feat-card h3{font-size:19px;margin-bottom:8px}
.feat-card p{font-size:14px;color:var(--t2);line-height:1.7}

/* WHY */
.why-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.why-item{padding:32px 28px;border-radius:var(--r2)}
.why-item h3{font-size:20px;margin-bottom:10px}
.why-item p{font-size:15px;color:var(--t2);line-height:1.75}

/* PRICING */
.plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch}
.plan-card{position:relative;padding:32px 28px;border-radius:var(--r2);display:flex;flex-direction:column}
.plan-card.reco{border-color:rgba(40,92,254,0.45);box-shadow:0 12px 40px rgba(40,92,254,0.14)}
.plan-badge{position:absolute;top:-11px;left:50%;transform:translateX(-50%);background:var(--grad);color:#fff;font-size:11px;font-weight:700;padding:4px 12px;border-radius:12px}
.plan-name{font-size:17px;font-weight:600;color:var(--t2);margin-bottom:14px}
.plan-price{font-size:40px;font-weight:800;letter-spacing:-1px;color:var(--t1);display:flex;align-items:flex-end;flex-wrap:wrap;gap:8px}
.plan-price small{font-size:15px;font-weight:500;color:var(--t3);margin-left:0}
.plan-save{
  display:inline-flex;
  align-items:center;
  padding:2px 8px;
  border-radius:999px;
  font-size:11px;
  font-weight:700;
  letter-spacing:.02em;
  line-height:1.4;
  color:#fff;
  background:var(--grad);
  box-shadow:0 2px 8px var(--brand-glow);
  margin-bottom:6px;
}
.plan-feats{list-style:none;margin:22px 0 26px;display:flex;flex-direction:column;gap:11px;flex:1}
.plan-feats li{display:flex;gap:9px;font-size:14px;color:var(--t2)}
.plan-feats li::before{content:'✓';color:var(--green);font-weight:700}
.plan-feats li.feat-no{color:var(--t3)}
.plan-feats li.feat-no::before{content:'✕';color:var(--danger)}
.plan-btn{width:100%;border-radius:22px;padding:13px;font-size:15px;font-weight:600;cursor:pointer;font-family:var(--font);border:1px solid var(--border);background:#fff;color:var(--t1);transition:all .2s}
.plan-btn:hover{background:var(--bg2);border-color:var(--border-h)}
.plan-card.reco .plan-btn{background:var(--grad);border:none;color:#fff;box-shadow:0 8px 22px var(--brand-glow)}

/* FOOTER + 备案 */
footer{border-top:1px solid var(--border);padding:44px 24px 36px;text-align:center;background:rgba(255,255,255,0.7)}
.footer-brand{display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.beian{display:flex;flex-direction:column;align-items:center;gap:8px;font-size:13px;color:var(--t2);line-height:1.8}
.beian a{color:var(--t2);transition:color .2s}
.beian a:hover{color:var(--brand)}
.beian .row{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:center}
.police-ic{width:14px;height:14px;vertical-align:-2px;margin-right:4px}
.footer-copy{margin-top:16px;font-size:13px;color:var(--t3)}

/* MODAL 通用 */
.modal-mask{position:fixed;inset:0;z-index:1000;background:rgba(24,40,61,0.42);backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;padding:24px}
.modal-box{width:100%;max-width:400px;border-radius:var(--r2);padding:34px 30px;position:relative;background:#fff;border:1px solid var(--border);box-shadow:var(--shadow-lg)}
.modal-close{position:absolute;top:16px;right:18px;background:none;border:none;color:var(--t2);font-size:20px;cursor:pointer;line-height:1}
.modal-title{font-size:22px;font-weight:700;margin-bottom:6px;color:var(--t1)}
.modal-sub{font-size:14px;color:var(--t2);margin-bottom:24px}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;color:var(--t2);margin-bottom:7px}
.field input{width:100%;background:var(--bg2);border:1px solid var(--border);border-radius:12px;padding:13px 14px;color:var(--t1);font-size:15px;font-family:var(--font);outline:none;transition:border-color .2s,box-shadow .2s}
.field input:focus{border-color:var(--blue);box-shadow:0 0 0 3px var(--brand-soft);background:#fff}
.code-row{display:flex;gap:10px}
.code-row input{flex:1}
.btn-code{white-space:nowrap;background:#fff;border:1px solid var(--border);color:var(--t1);border-radius:12px;padding:0 16px;font-size:13px;cursor:pointer;font-family:var(--font);transition:all .2s}
.btn-code:hover:not(:disabled){border-color:var(--border-h);background:var(--bg2)}
.btn-code:disabled{opacity:.5;cursor:not-allowed}
.btn-block{width:100%;background:var(--grad);color:#fff;border:none;border-radius:14px;padding:14px;font-size:16px;font-weight:700;cursor:pointer;font-family:var(--font);margin-top:8px;transition:all .2s;box-shadow:0 8px 20px var(--brand-glow)}
.btn-block:hover{opacity:.94}
.btn-block:disabled{opacity:.6;cursor:not-allowed}
.form-err{color:var(--danger);font-size:13px;min-height:18px;margin-top:8px}
.form-agree{font-size:12px;color:var(--t3);margin-top:16px;text-align:center;line-height:1.6}
.form-agree a{color:var(--t2);text-decoration:underline}

/* PAY MODAL */
.pay-plan{display:flex;justify-content:space-between;align-items:baseline;padding:14px 16px;border-radius:12px;background:var(--bg2);border:1px solid var(--border);margin-bottom:20px}
.pay-plan .pp-name{font-size:14px;color:var(--t2)}
.pay-plan .pp-price{font-size:22px;font-weight:800;color:var(--t1)}
.pay-channels{display:flex;gap:12px;margin-bottom:22px}
.pay-ch{flex:1;padding:16px;border-radius:14px;border:1.5px solid var(--border);background:#fff;cursor:pointer;text-align:center;transition:all .2s}
.pay-ch:hover{border-color:var(--border-h)}
.pay-ch.active{border-color:var(--blue);background:var(--brand-soft)}
.pay-ch .ch-ic{font-size:26px;margin-bottom:6px}
.pay-ch .ch-name{font-size:13px;font-weight:600;color:var(--t1)}
.qr-wrap{text-align:center}
.qr-box{width:200px;height:200px;margin:0 auto 16px;border-radius:16px;background:#fff;border:1px solid var(--border);display:flex;align-items:center;justify-content:center;padding:12px}
.qr-box canvas,.qr-box img{width:100%;height:100%}
.qr-hint{font-size:13px;color:var(--t2);margin-bottom:10px}
.qr-mock{font-size:12px;color:var(--t3);border:1px dashed var(--border-h);border-radius:10px;padding:10px;margin-top:10px}
.pay-status{font-size:14px;margin-top:12px;color:var(--t2)}
.pay-status.paid{color:var(--green);font-weight:600}

/* 法律条款页（用户协议 / 隐私政策）*/
.legal-wrap{max-width:760px;margin:0 auto;padding:120px 24px 80px}
.legal-wrap h1{font-size:clamp(26px,4vw,36px);margin-bottom:8px}
.legal-updated{font-size:13px;color:var(--t3);margin-bottom:36px}
.legal-wrap h2{font-size:19px;margin:32px 0 12px}
.legal-wrap p,.legal-wrap li{font-size:15px;color:var(--t2);line-height:1.85}
.legal-wrap ul,.legal-wrap ol{padding-left:22px;margin-bottom:14px}
.legal-wrap li{margin-bottom:6px}
.legal-wrap p{margin-bottom:14px}
.legal-wrap a{color:var(--blue);text-decoration:underline}
.legal-wrap strong{color:var(--t1)}

/* TRIAL 页 */
.trial-wrap{min-height:100vh;display:flex;align-items:flex-start;justify-content:center;padding:104px 20px 60px}
.trial-card{width:100%;max-width:560px;border-radius:var(--r2);padding:34px 32px;background:#fff;border:1px solid var(--border);box-shadow:var(--shadow-lg)}
.trial-banner{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:20px;background:var(--brand-soft);border:1px solid rgba(40,92,254,0.22);font-size:12px;font-weight:700;color:var(--blue);letter-spacing:.4px;margin-bottom:16px}
.trial-card h1{font-size:22px;margin-bottom:6px}
.trial-lead{font-size:14px;color:var(--t2);margin-bottom:22px;line-height:1.6}
.trial-lead b{color:var(--t1)}
.t-field{margin-bottom:16px}
.t-field>label{display:block;font-size:13px;color:var(--t2);margin-bottom:8px}
.t-input,.t-select{width:100%;background:var(--bg2);border:1px solid var(--border);border-radius:12px;padding:13px 14px;color:var(--t1);font-size:15px;font-family:var(--font);outline:none;transition:border-color .2s,box-shadow .2s}
.t-input:focus,.t-select:focus{border-color:var(--blue);box-shadow:0 0 0 3px var(--brand-soft);background:#fff}
.chip-row{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-flex;align-items:center;gap:6px;padding:8px 13px;border-radius:999px;border:1px solid var(--border);background:#fff;font-size:13px;color:var(--t1);cursor:pointer;transition:all .15s}
.chip:hover{border-color:var(--border-h);background:var(--bg2)}
.chip input{accent-color:var(--blue);margin:0}
.chip:has(input:checked){border-color:var(--blue);background:var(--brand-soft);color:var(--blue)}
.group-card{display:flex;align-items:center;gap:14px;padding:14px;border-radius:14px;background:var(--brand-soft);border:1px solid rgba(40,92,254,0.18);margin-bottom:20px}
.group-qr{width:74px;height:74px;border-radius:10px;flex-shrink:0;object-fit:cover;background:#fff;border:1px solid var(--border)}
.group-step{font-size:10px;font-weight:800;letter-spacing:1px;color:var(--blue);text-transform:uppercase;margin-bottom:4px}
.group-title{font-size:14px;font-weight:700}
.group-hint{font-size:12px;color:var(--t2);margin-top:3px;line-height:1.5}
.t-status-head{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.t-status-ic{width:48px;height:48px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:22px;background:var(--brand-soft);color:var(--blue)}
.t-status-ic.ok{background:rgba(22,163,74,0.12);color:var(--green)}
.t-status-ic.warn{background:rgba(220,38,38,0.1);color:var(--danger)}
.t-plan-exp{font-size:14px;color:var(--t2);margin-bottom:14px}
.plat-tag{display:inline-block;margin:4px 6px 0 0;padding:4px 11px;border-radius:999px;font-size:12px;background:var(--brand-soft);color:var(--blue);border:1px solid rgba(40,92,254,0.25)}
.dl-rows{display:flex;flex-direction:column;gap:10px;margin:14px 0 4px}
.dl-row{display:flex;align-items:center;gap:14px;padding:13px 16px;border-radius:14px;border:1px solid var(--border);background:#fff;transition:all .2s}
.dl-row:hover{border-color:var(--blue);background:var(--brand-soft);transform:translateX(3px)}
.dl-row-info{flex:1}
.dl-os{display:block;font-size:14px;font-weight:700}
.dl-arch{display:block;font-size:12px;color:var(--t3);margin-top:2px}
.dl-pill{font-size:10px;font-weight:700;letter-spacing:.5px;padding:3px 8px;border-radius:6px;background:var(--brand-soft);color:var(--blue);text-transform:uppercase}
.dl-arrow{color:var(--t3);font-size:14px}
.code-box{margin-top:12px;padding:16px;border-radius:12px;background:var(--bg2);border:1px dashed var(--brand-glow);font-family:ui-monospace,Menlo,monospace;font-size:12px;line-height:1.6;color:var(--brand);word-break:break-all}
.t-tip{font-size:12px;color:var(--t3);margin-top:10px;line-height:1.6}
.t-spin{width:30px;height:30px;margin:24px auto;border-radius:50%;border:3px solid var(--border);border-top-color:var(--blue);animation:t-rot .8s linear infinite}
@keyframes t-rot{to{transform:rotate(360deg)}}

@media(max-width:820px){
  .nav-toggle{display:flex}
  .nav-links{
    display:none;
    position:fixed;top:72px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    padding:12px 20px 20px;
    background:rgba(255,255,255,0.96);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
    border-bottom:1px solid var(--border);
    box-shadow:var(--shadow);
  }
  nav.menu-open .nav-links{display:flex}
  .nav-link{padding:14px 8px;border-bottom:1px solid var(--border)}
  .nav-link:last-child{border-bottom:none}
  .feat-grid,.plan-grid,.why-grid,.metric-grid{grid-template-columns:1fr}
  section{padding:64px 0}
}