:root{
  --bg:#F5F5F7;--ink:#111113;--ink-soft:#3D3D42;--muted:#5E5E66;--muted-light:#6B6B73;
  --line:#E6E6EB;--blue:#0071e3;--danger:#C81E1E;--success:#15803D;
  --glass:linear-gradient(158deg,rgba(255,255,255,.74),rgba(255,255,255,.40));
  --glass-soft:linear-gradient(158deg,rgba(255,255,255,.60),rgba(255,255,255,.32));
  --glass-border:rgba(255,255,255,.78);
  --shadow:0 1px 0 rgba(255,255,255,.95) inset,0 -1px 0 rgba(255,255,255,.35) inset,0 1px 2px rgba(16,20,48,.05),0 14px 34px -16px rgba(31,38,135,.22);
  --radius:20px;--ease:cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Text","SF Pro Display","PingFang SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:76px}
body{margin:0;min-height:100vh;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
[hidden]{display:none!important}
:focus-visible{outline:2px solid rgba(17,17,19,.72);outline-offset:3px;border-radius:8px}

/* 背景光斑 */
.bg{position:fixed;inset:0;z-index:-2;pointer-events:none;overflow:hidden;background:var(--bg)}
.orb{position:absolute;border-radius:50%;filter:blur(40px);will-change:transform}
.orb-1{width:82vmax;height:82vmax;left:-26vmax;top:-34vmax;background:radial-gradient(circle,rgba(255,183,205,.92) 0%,rgba(255,183,205,0) 66%);animation:d1 38s ease-in-out infinite alternate}
.orb-2{width:74vmax;height:74vmax;right:-30vmax;top:-10vmax;background:radial-gradient(circle,rgba(214,203,255,.85) 0%,rgba(214,203,255,0) 66%);animation:d2 46s ease-in-out infinite alternate}
.orb-3{width:78vmax;height:78vmax;right:-24vmax;bottom:-34vmax;background:radial-gradient(circle,rgba(178,232,222,.9) 0%,rgba(178,232,222,0) 66%);animation:d3 42s ease-in-out infinite alternate}
.orb-4{width:68vmax;height:68vmax;left:-22vmax;bottom:-28vmax;background:radial-gradient(circle,rgba(184,215,255,.85) 0%,rgba(184,215,255,0) 66%);animation:d4 50s ease-in-out infinite alternate}
@keyframes d1{from{transform:translate3d(0,0,0) scale(1)}to{transform:translate3d(6vmax,4vmax,0) scale(1.12)}}
@keyframes d2{from{transform:translate3d(0,0,0) scale(1.06)}to{transform:translate3d(-5vmax,7vmax,0) scale(1)}}
@keyframes d3{from{transform:translate3d(0,0,0) scale(1)}to{transform:translate3d(-7vmax,-5vmax,0) scale(1.1)}}
@keyframes d4{from{transform:translate3d(0,0,0) scale(1.08)}to{transform:translate3d(5vmax,-6vmax,0) scale(1)}}
.noise{position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.038;mix-blend-mode:multiply;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)'/%3E%3C/svg%3E")}

/* 导航 */
.nav{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.42);backdrop-filter:blur(22px) saturate(190%);-webkit-backdrop-filter:blur(22px) saturate(190%);border-bottom:1px solid rgba(255,255,255,.55);transition:background .3s var(--ease),box-shadow .3s var(--ease)}
.nav.is-scrolled{background:rgba(255,255,255,.66);box-shadow:0 1px 0 rgba(16,20,48,.045),0 10px 30px -22px rgba(16,20,48,.5)}
.nav-in{max-width:1000px;margin:0 auto;padding:calc(12px + env(safe-area-inset-top,0px)) 20px 12px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:inline-flex;align-items:center;gap:9px;font-size:15.5px;font-weight:700;letter-spacing:-.015em;flex:none}
.brand-mark{width:23px;height:23px;border-radius:7px;flex:none;display:grid;place-items:center;font-size:11px;font-weight:900;color:#fff;background:linear-gradient(160deg,#2E2E33,#0E0E11);box-shadow:inset 0 1px 0 rgba(255,255,255,.28),0 3px 8px -3px rgba(0,0,0,.45);transition:transform .35s var(--ease)}
.brand:hover .brand-mark{transform:rotate(-6deg) scale(1.06)}
.brand-sub{color:var(--muted-light);font-weight:600;font-size:12.5px;margin-left:2px}
.nav-links{display:flex;align-items:center;gap:20px;font-size:14px;font-weight:500}
.nav-links>a{position:relative;color:var(--muted);transition:color .2s}
.nav-links>a::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:1.5px;border-radius:2px;background:currentColor;transform:scaleX(0);transform-origin:left center;transition:transform .32s var(--ease)}
.nav-links>a:hover{color:var(--ink)}
.nav-links>a:hover::after{transform:scaleX(1)}
.nav-login,.btn-ghost{padding:7px 16px;border-radius:9px;color:var(--ink);font-weight:600;background:rgba(255,255,255,.7);border:1px solid rgba(255,255,255,.9);box-shadow:0 1px 0 rgba(255,255,255,.95) inset,0 1px 2px rgba(16,20,48,.06),0 6px 16px -10px rgba(16,20,48,.35);transition:transform .2s var(--ease),background .2s,box-shadow .25s var(--ease);font:inherit;cursor:pointer}
.nav-login:hover,.btn-ghost:hover{background:rgba(255,255,255,.92);transform:translateY(-1px)}
@media(max-width:560px){.nav-in{padding-left:16px;padding-right:16px;gap:10px}.nav-links{gap:12px;font-size:13px}.nav-login{padding:6px 12px;font-size:13px}.brand-sub{display:none}}

/* 主体 */
main{flex:1;width:100%;max-width:1000px;margin:0 auto;padding:0 20px}

/* Hero */
.hero{display:flex;flex-direction:column;align-items:center;text-align:center;padding:clamp(48px,9vh,92px) 0 clamp(40px,6vh,64px)}
.badge{display:inline-flex;align-items:center;gap:8px;padding:7px 14px 7px 12px;margin-bottom:24px;border-radius:999px;font-size:12.5px;font-weight:500;color:var(--ink-soft);background:rgba(255,255,255,.6);backdrop-filter:blur(14px) saturate(180%);-webkit-backdrop-filter:blur(14px) saturate(180%);border:1px solid rgba(255,255,255,.85);box-shadow:0 1px 0 rgba(255,255,255,.95) inset,0 10px 24px -14px rgba(31,38,135,.35)}
.dot{width:6px;height:6px;border-radius:50%;flex:none;background:#22C55E;box-shadow:0 0 0 3px rgba(34,197,94,.18);animation:pulse 2.6s ease-in-out infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 3px rgba(34,197,94,.18)}50%{box-shadow:0 0 0 7px rgba(34,197,94,.04)}}
.hero h1{font-size:clamp(30px,6.6vw,48px);font-weight:700;line-height:1.22;letter-spacing:-.032em;text-wrap:balance;margin-bottom:18px;color:#0D0D10;text-shadow:0 1px 0 rgba(255,255,255,.7)}
.desc{font-size:clamp(14px,2.8vw,16px);line-height:1.72;color:var(--muted);max-width:32em;text-wrap:pretty;margin-bottom:30px}
.actions{display:flex;justify-content:center;width:100%}

/* 按钮 */
.btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:8px;height:47px;padding:0 28px;border:0;border-radius:12px;font-size:15px;font-weight:600;letter-spacing:-.01em;white-space:nowrap;overflow:hidden;isolation:isolate;cursor:pointer;transition:transform .2s var(--ease),box-shadow .3s var(--ease),background .25s}
.btn:active{transform:scale(.972)}
.btn::after{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;background:linear-gradient(115deg,transparent 30%,rgba(255,255,255,.38) 46%,rgba(255,255,255,.06) 58%,transparent 72%);transform:translateX(-130%);transition:transform .85s var(--ease)}
.btn:hover::after{transform:translateX(130%)}
.btn-main{color:#fff;background:linear-gradient(168deg,#33333A 0%,#141417 58%,#0B0B0E 100%);box-shadow:0 1px 0 rgba(255,255,255,.26) inset,0 -1px 0 rgba(0,0,0,.55) inset,0 2px 4px rgba(16,20,48,.18),0 16px 32px -14px rgba(16,20,48,.65)}
.btn-main:hover{background:linear-gradient(168deg,#3E3E47 0%,#1C1C21 58%,#111114 100%);transform:translateY(-1px)}

/* 特性卡片 */
.cards{display:grid;grid-template-columns:1fr;gap:12px;padding-bottom:clamp(48px,8vh,84px)}
@media(min-width:720px){.cards{grid-template-columns:repeat(3,1fr);gap:16px}}
.card {position:relative;overflow:hidden;isolation:isolate;padding:24px 22px;border-radius:var(--radius);background:var(--glass);backdrop-filter:blur(24px) saturate(180%);-webkit-backdrop-filter:blur(24px) saturate(180%);border:1px solid var(--glass-border);box-shadow:var(--shadow);transition:transform .42s cubic-bezier(0.2, 0.8, 0.4, 1),box-shadow .42s cubic-bezier(0.2, 0.8, 0.4, 1)}
.card:hover{transform:translateY(-4px);box-shadow:0 1px 0 rgba(255,255,255,1) inset,0 22px 48px -18px rgba(31,38,135,.30)}
.card-icon{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;margin-bottom:15px;color:var(--ink);background:linear-gradient(160deg,rgba(255,255,255,.98),rgba(255,255,255,.62));border:1px solid rgba(255,255,255,.95);box-shadow:0 1px 0 #fff inset,0 4px 12px -5px rgba(16,20,48,.22)}
.card-icon svg{width:18px;height:18px;stroke:currentColor;stroke-width:1.85;stroke-linecap:round;stroke-linejoin:round;fill:none}
.card h3{font-size:15.5px;font-weight:650;letter-spacing:-.012em;margin-bottom:7px}
.card p{font-size:13.6px;line-height:1.7;color:var(--muted)}

/* FAQ */
.faq{max-width:740px;margin:0 auto;padding-bottom:clamp(56px,9vh,96px)}
.faq-title{font-size:clamp(19px,4vw,24px);font-weight:700;letter-spacing:-.024em;margin-bottom:16px;padding-left:2px}
.faq-panel{padding:4px 22px;border-radius:22px;background:var(--glass-soft);backdrop-filter:blur(24px) saturate(180%);-webkit-backdrop-filter:blur(24px) saturate(180%);border:1px solid rgba(255,255,255,.72);box-shadow:var(--shadow)}
.qa{border-bottom:1px solid rgba(16,20,48,.07)}
.qa:last-child{border-bottom:none}
.qa summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 0;
  font-size:14.8px;
  font-weight:600;
  transition:color .2s;
}
.qa summary::-webkit-details-marker{display:none}
.qa summary::marker{content:""}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{
  content:"";
  flex:none;
  display:inline-block;
  width:12px;
  height:12px;
  background:
    linear-gradient(currentColor,currentColor) center/12px 1.6px no-repeat,
    linear-gradient(currentColor,currentColor) center/1.6px 12px no-repeat;
  opacity:.34;
  transform-origin:center;
  transition:transform .35s cubic-bezier(0.2, 0.8, 0.4, 1), opacity .25s;
}
.qa[open] summary::after{
  transform:rotate(45deg);
  opacity:.7;
}
/* 主方案：Chromium 支持 interpolate-size 时，直接 height 过渡 */
@supports (interpolate-size: allow-keywords){
  .qa::details-content{
    block-size:0;
    overflow:clip;
    transition:block-size .42s cubic-bezier(0.2, 0.8, 0.4, 1);
    transition-behavior:allow-discrete;
  }
  .qa[open]::details-content{
    block-size:auto;
  }
  .qa-body-wrap{
    display:block;
  }
}

/* 降级：不支持 interpolate-size 时用 grid，子元素必须 min-height:0 */
@supports not (interpolate-size: allow-keywords){
  .qa-body-wrap{
    display:grid;
    grid-template-rows:0fr;
    transition:grid-template-rows .45s cubic-bezier(0.2, 0.8, 0.4, 1);
  }
  .qa[open] .qa-body-wrap{
    grid-template-rows:1fr;
  }
}

.qa-body{
  overflow:hidden;
  min-height:0;
}
.qa[open] .qa-body-wrap{grid-template-rows:1fr}
.qa-body{overflow:hidden}
.qa-body p{
  margin:0;
  padding:0 0 20px;
  font-size:13.9px;
  line-height:1.8;
  color:var(--muted);
  max-width:62ch;
  opacity:0;
  transform:translateY(-4px);
  transition:
    opacity .28s ease .06s,
    transform .32s cubic-bezier(0.2, 0.8, 0.4, 1) .04s;
}
.qa[open] .qa-body p{
  opacity:1;
  transform:none;
}
.qa-body p{margin:0;padding:0 0 20px;font-size:13.9px;line-height:1.8;color:var(--muted);max-width:62ch}
.qa-body p+p{margin-top:9px}

/* 页脚 */
.footer{margin-top:auto;border-top:1px solid rgba(255,255,255,.75);background:rgba(255,255,255,.32);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}
.footer-main{max-width:1000px;margin:0 auto;padding:32px 20px 24px;display:grid;grid-template-columns:1fr;gap:28px}
@media(min-width:640px){.footer-main{grid-template-columns:1.2fr 1.8fr;gap:48px}}
.footer-brand{display:flex;align-items:flex-start;gap:10px}
.footer-brand .brand-mark{border-radius:8px}
.footer-name{font-size:15px;font-weight:700;letter-spacing:-.01em;margin-bottom:4px}
.footer-desc{font-size:12.8px;color:var(--muted);line-height:1.6}
.footer-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.footer-col{display:flex;flex-direction:column;gap:8px;font-size:12.8px}
.footer-col-title{font-size:11.5px;font-weight:600;color:var(--muted-light);letter-spacing:.04em;text-transform:uppercase;margin-bottom:2px}
.footer-col a,.footer-link-btn{color:var(--muted);text-decoration:none;font-size:12.8px;line-height:1.4;padding:0;border:0;background:none;text-align:left;cursor:pointer;transition:color .2s}
.footer-col a:hover,.footer-link-btn:hover{color:var(--ink)}
.footer-bottom{max-width:1000px;margin:0 auto;padding:14px 20px calc(14px + env(safe-area-inset-bottom,0px));border-top:1px solid rgba(16,20,48,.06);display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:11.8px;color:var(--muted-light)}
.footer-status{display:inline-flex;align-items:center;gap:6px}
.footer-status .dot{box-shadow:0 0 0 2px rgba(34,197,94,.15);animation:pulse 2.6s ease-in-out infinite}

/* 弹窗 */
.modal{position:fixed;inset:0;z-index:120;display:flex;align-items:center;justify-content:center;padding:16px}
.modal[hidden]{display:none!important}
.modal-bg{position:absolute;inset:0;background:rgba(16,20,48,.34);backdrop-filter:blur(10px) saturate(140%);-webkit-backdrop-filter:blur(10px) saturate(140%);opacity:0;transition:opacity .28s var(--ease)}
.modal-panel{position:relative;z-index:1;width:100%;max-width:388px;max-height:calc(100dvh - 32px);overflow-y:auto;padding:24px 22px 22px;border-radius:22px;background:linear-gradient(158deg,rgba(255,255,255,.97),rgba(255,255,255,.90));border:1px solid rgba(255,255,255,.92);box-shadow:0 1px 0 #fff inset,0 30px 70px -26px rgba(16,20,48,.55);opacity:0;transform:translateY(16px) scale(.985);transition:opacity .32s ease,transform .38s cubic-bezier(0.2, 0.8, 0.4, 1)}
.modal.is-open .modal-bg{opacity:1}
.modal.is-open .modal-panel{opacity:1;transform:none}
.modal-close{position:absolute;top:12px;right:12px;width:32px;height:32px;padding:0;display:grid;place-items:center;border:0;border-radius:9px;background:rgba(16,20,48,.055);color:var(--muted);cursor:pointer;transition:background .2s,color .2s}
.modal-close:hover{background:rgba(16,20,48,.1);color:var(--ink)}
.modal-close svg{width:15px;height:15px;stroke:currentColor;stroke-width:2;stroke-linecap:round;fill:none}
.modal h2{font-size:21px;font-weight:700;letter-spacing:-.026em;margin:0 0 6px;padding-right:32px}
.modal .sub{font-size:13px;line-height:1.6;color:var(--muted);margin:0 0 18px}
.tabs{position:relative;display:grid;grid-template-columns:1fr 1fr;padding:4px;margin-bottom:16px;border-radius:11px;background:rgba(16,20,48,.055);border:1px solid rgba(16,20,48,.045)}
.tabs button{position:relative;z-index:2;height:34px;border:0;border-radius:8px;background:none;font-size:13px;font-weight:600;color:var(--muted);cursor:pointer;transition:background .25s,color .25s}
.tabs button.active{background:#fff;color:var(--ink);box-shadow:0 1px 0 #fff inset,0 1px 2px rgba(16,20,48,.09),0 6px 14px -8px rgba(16,20,48,.45)}
.field{margin-bottom:13px}
.field label{display:block;font-size:12.4px;font-weight:600;color:var(--ink-soft);margin-bottom:5px}
.input{width:100%;height:42px;padding:0 12px;font-size:16px;color:var(--ink);background:rgba(255,255,255,.86);border:1px solid rgba(16,20,48,.13);border-radius:10px;outline:none;transition:border-color .2s,background .2s,box-shadow .2s}
.input::placeholder{color:#9A9AA2;font-size:14px}
.input:focus{background:#fff;border-color:rgba(17,17,19,.5);box-shadow:0 0 0 3px rgba(17,17,19,.08)}
.input.is-error{border-color:rgba(200,30,30,.62);box-shadow:0 0 0 3px rgba(200,30,30,.09)}
.code-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px;align-items:stretch}
.btn-inline{min-width:104px;height:42px;padding:0 12px;border-radius:10px;font-size:13px;font-weight:600;white-space:nowrap;color:var(--ink);background:rgba(255,255,255,.9);border:1px solid rgba(16,20,48,.13);cursor:pointer;transition:background .2s,border-color .2s,transform .2s var(--ease);font:inherit}
.btn-inline:hover:not(:disabled){background:#fff;border-color:rgba(16,20,48,.26)}
.btn-inline:disabled{color:var(--muted-light);background:rgba(16,20,48,.05);cursor:not-allowed}
.captcha-btn{width:104px;height:42px;padding:0;border-radius:10px;overflow:hidden;background:#fff;border:1px solid rgba(16,20,48,.13);cursor:pointer;transition:border-color .2s}
.captcha-btn:hover{border-color:rgba(16,20,48,.28)}
.captcha-btn canvas{width:100%;height:100%;display:block}
.btn-block{width:100%;height:45px;margin-top:4px;font-size:14.5px;border-radius:11px}
.hint{font-size:11.5px;line-height:1.5;margin-top:5px;color:var(--muted-light)}
.hint.ok{color:var(--success)}
.hint.err{color:var(--danger)}
.foot{font-size:12.4px;color:var(--muted);text-align:center;margin-top:10px;line-height:1.6}
.spinner{width:14px;height:14px;border-radius:50%;border:2px solid rgba(255,255,255,.35);border-top-color:#fff;display:inline-block;vertical-align:middle;margin-right:6px;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* Toast */
.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));z-index:140;max-width:min(92vw,420px);padding:11px 18px;border-radius:12px;font-size:13.4px;font-weight:500;line-height:1.55;text-align:center;color:#fff;background:rgba(17,17,19,.93);backdrop-filter:blur(10px);box-shadow:0 14px 34px -14px rgba(0,0,0,.65);opacity:0;pointer-events:none;transform:translate(-50%,14px);transition:opacity .28s var(--ease),transform .28s var(--ease)}
.toast.show{opacity:1;transform:translate(-50%,0)}
.toast.err{background:rgba(158,20,20,.95)}
.toast.ok{background:rgba(15,105,58,.95)}

/* 控制台 */
.console{max-width:880px;margin:0 auto;padding:clamp(48px,8vh,80px) 20px 64px}
.console-head{text-align:center;margin-bottom:32px}
.console-head h1{font-size:clamp(26px,5vw,34px);font-weight:700;letter-spacing:-.028em;margin-bottom:8px}
.console-head p{color:var(--muted);font-size:14.5px}
.c-card{padding:26px 24px;border-radius:20px;background:var(--glass);backdrop-filter:blur(24px) saturate(180%);-webkit-backdrop-filter:blur(24px) saturate(180%);border:1px solid var(--glass-border);box-shadow:var(--shadow);margin-bottom:14px}
.c-card h2{font-size:16px;font-weight:650;margin:0 0 14px;letter-spacing:-.012em}
.c-card p{font-size:13.6px;line-height:1.7;color:var(--muted)}
.kv{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid rgba(16,20,48,.06);font-size:14px}
.kv:last-child{border-bottom:none}
.kv .k{color:var(--muted)}
.kv .v{font-weight:500;color:var(--ink)}
.placeholder{display:flex;align-items:center;justify-content:center;min-height:100px;border:1.5px dashed rgba(16,20,48,.18);border-radius:14px;color:var(--muted-light);font-size:13.5px;font-weight:500;background:rgba(255,255,255,.4)}

@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}.orb{animation:none}}
@media(max-width:768px){.noise{display:none}.orb-3,.orb-4{display:none}.card,.faq-panel,.c-card{backdrop-filter:none;-webkit-backdrop-filter:none;background:rgba(255,255,255,.88)}}