:root{
  --bg:var(--site-bg);--bg-strong:var(--site-soft);--surface:var(--site-surface);--surface-solid:var(--site-surface);
  --surface-muted:var(--site-soft);--text:var(--site-text);--muted:var(--site-muted);--line:var(--site-line);
  --blue:var(--site-action);--blue-strong:var(--site-accent);--blue-soft:var(--site-accent-soft);--green:var(--site-success);--amber:var(--site-warning);--red:var(--site-danger);
  --shadow:var(--site-shadow);--shadow-small:0 8px 24px rgba(30,22,49,.08);
  --radius:24px;--radius-small:14px;--page:1160px;--ease:cubic-bezier(.22,1,.36,1);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
html{min-height:100%;background:var(--bg)}
body{min-height:100vh;margin:0;color:var(--text);background:var(--site-bg);font-size:15px;line-height:1.55}
button,input{font:inherit}button,a{ -webkit-tap-highlight-color:transparent }
a{color:inherit;text-decoration:none}button{color:inherit}
.skip-link{position:fixed;left:12px;top:-60px;z-index:1000;background:#111;color:#fff;padding:10px 14px;border-radius:10px}
.skip-link:focus{top:12px}
.app-nav{position:sticky;top:0;z-index:50;padding:12px 18px}
.app-nav-inner{width:min(var(--page),calc(100% - 8px));height:58px;margin:auto;display:flex;align-items:center;gap:12px;padding:0 12px 0 16px;border:1px solid var(--site-line);border-radius:19px;background:var(--site-surface);box-shadow:0 8px 30px rgba(35,48,69,.09);backdrop-filter:blur(22px) saturate(145%);-webkit-backdrop-filter:blur(22px) saturate(145%)}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link,.icon-button{height:40px;border:0;border-radius:12px;background:transparent;display:inline-flex;align-items:center;justify-content:center;padding:0 13px;color:var(--site-muted);font-weight:620;cursor:pointer;transition:background-color 160ms ease,color 160ms ease}
.nav-link:hover,.icon-button:hover{background:var(--site-soft);color:var(--text)}
.nav-link[aria-current="page"]{background:var(--blue-soft);color:var(--blue-strong)}
.nav-primary{border-color:var(--primary-action-border);border-radius:var(--primary-action-radius);background:var(--primary-action-background);color:var(--primary-action-ink);box-shadow:var(--primary-action-shadow);transition:var(--primary-action-transition);transform:var(--primary-action-transform);}
.nav-primary:hover:not(:disabled){background:var(--primary-action-hover-background);border-color:var(--primary-action-border);color:var(--primary-action-ink);box-shadow:var(--primary-action-hover-shadow);transform:var(--primary-action-transform);}
.icon-button{width:40px;padding:0;font-size:19px}
.page{width:min(var(--page),calc(100% - 36px));margin:34px auto 76px}
.hero{padding:58px 24px 40px;text-align:center}
.eyebrow{display:inline-flex;align-items:center;gap:7px;min-height:30px;padding:4px 10px;border:1px solid rgba(20,125,245,.16);border-radius:999px;background:var(--blue-soft);color:var(--blue-strong);font-size:12px;font-weight:700}
.eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 4px rgba(20,125,245,.12)}
h1,h2,h3,p{margin-top:0}.hero h1{max-width:820px;margin:19px auto 14px;font-size:clamp(38px,5.8vw,68px);line-height:1.04;letter-spacing:-.055em;font-weight:780}
.hero p{max-width:680px;margin:0 auto;color:var(--muted);font-size:clamp(16px,2vw,20px)}
.hero-actions{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-top:26px}
.button{min-height:46px;border:1px solid var(--line);border-radius:14px;background:var(--surface-solid);display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:0 18px;font-weight:700;cursor:pointer;box-shadow:var(--shadow-small);transition:background-color 160ms ease,color 160ms ease,border-color 160ms ease,transform 220ms var(--ease)}
.button:not(:where(.site-circle-close,.subscription-channel-tab,.subscription-qr-refresh,.subscription-payment-check)):hover{transform:translateY(-1px);border-color:rgba(20,125,245,.22)}
.button:not(:where(.site-circle-close,.subscription-channel-tab,.subscription-qr-refresh,.subscription-payment-check)):active{transform:scale(.985)}
.button.primary{border-color:var(--primary-action-border);border-radius:var(--primary-action-radius);background:var(--primary-action-background);color:var(--primary-action-ink);box-shadow:var(--primary-action-shadow);transition:var(--primary-action-transition);transform:var(--primary-action-transform);}
.button.primary:hover:not(:disabled){background:var(--primary-action-hover-background);border-color:var(--primary-action-border);color:var(--primary-action-ink);box-shadow:var(--primary-action-hover-shadow);transform:var(--primary-action-transform);}
.button.ghost{box-shadow:none;background:transparent}
.button.danger{color:var(--red)}
.button.small{min-height:38px;padding:0 14px;border-radius:11px;font-size:13px}
.section{margin-top:54px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin:0 auto 18px}
.section-head h2{margin:0;font-size:28px;letter-spacing:-.035em}.section-head p{margin:0;max-width:560px;color:var(--muted)}
.pricing-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;align-items:stretch}
.plan{position:relative;display:flex;flex-direction:column;min-height:456px;padding:24px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow-small);overflow:hidden}
.plan.recommended{border-color:rgba(20,125,245,.45);box-shadow:0 20px 58px rgba(20,125,245,.15),inset 0 0 0 1px rgba(20,125,245,.12)}
.plan.recommended::before{content:"更适合长期使用";position:absolute;right:14px;top:14px;padding:5px 9px;border-radius:999px;background:var(--blue-soft);color:var(--blue-strong);font-size:11px;font-weight:760}
.plan-kicker{color:var(--muted);font-size:12px;font-weight:700}.plan h3{font-size:24px;letter-spacing:-.03em;margin:5px 0 18px}.price{display:flex;align-items:baseline;gap:4px}.price strong{font-size:48px;line-height:1;letter-spacing:-.05em}.price span{color:var(--muted)}
.plan-note{min-height:44px;margin:10px 0 18px;color:var(--muted);font-size:13px}.plan ul{list-style:none;margin:0 0 24px;padding:0;display:grid;gap:11px}.plan li{display:flex;gap:9px;align-items:flex-start}.plan li::before{content:"✓";width:20px;height:20px;flex:0 0 20px;display:grid;place-items:center;border-radius:50%;background:var(--site-soft);color:var(--green);font-size:12px;font-weight:850}.plan li.off{color:var(--muted)}.plan li.off::before{content:"—";background:var(--surface-muted);color:var(--site-muted)}.plan .button{margin-top:auto;width:100%}
.compare{overflow:auto;border:1px solid var(--line);border-radius:20px;background:var(--surface-solid);box-shadow:var(--shadow-small)}
.compare table{width:100%;min-width:690px;border-collapse:collapse}.compare th,.compare td{padding:15px 18px;border-bottom:1px solid var(--line);text-align:center}.compare th:first-child,.compare td:first-child{text-align:left}.compare tr:last-child td{border-bottom:0}.compare th{background:var(--surface-muted);font-size:13px}.yes{color:var(--green);font-weight:800}.no{color:#999}
.notice{display:grid;grid-template-columns:auto 1fr;gap:12px;padding:16px 18px;border:1px solid rgba(224,147,20,.22);border-radius:16px;background:var(--site-warning-bg);color:var(--site-warning)}.notice strong,.notice span{display:block}.notice span{color:var(--site-warning);font-size:13px}
.faq{display:grid;grid-template-columns:1fr 1fr;gap:12px}.faq details{border:1px solid var(--line);border-radius:16px;background:var(--surface-solid);padding:0 17px}.faq summary{cursor:pointer;list-style:none;min-height:58px;display:flex;align-items:center;justify-content:space-between;font-weight:700}.faq summary::after{content:"＋";color:var(--muted);font-size:20px}.faq details[open] summary::after{content:"−"}.faq details p{padding:0 0 16px;margin:0;color:var(--muted);font-size:14px}
.footer{width:min(var(--page),calc(100% - 36px));margin:0 auto;padding:24px 0 36px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--muted);font-size:12px}.footer-links{display:flex;gap:16px;flex-wrap:wrap}
.auth-shell{width:min(1040px,calc(100% - 36px));min-height:calc(100vh - 150px);margin:34px auto 70px;display:grid;grid-template-columns:1.04fr .96fr;border:1px solid var(--site-line);border-radius:30px;background:var(--site-surface);box-shadow:var(--shadow);overflow:hidden}
.auth-story{position:relative;min-height:650px;padding:48px;display:flex;flex-direction:column;justify-content:space-between;background:var(--site-soft)}
/* Isolate the first in-flow top margin so the body gradient reaches the viewport edge. */
html.auth-layout-page{height:100%;overflow:hidden;scrollbar-gutter:auto}
body.login-page{display:flow-root;block-size:100dvh;overflow:hidden;box-sizing:border-box}
.login-page .auth-scroll{block-size:calc(100dvh - var(--site-header-height) - var(--site-note-height));overflow:auto;overscroll-behavior:contain;scrollbar-gutter:stable}
.auth-story-description{margin:16px 0 0;color:var(--site-muted);font-size:16px;line-height:1.8}
.login-page .auth-card{min-block-size:var(--auth-registration-height,0px)}
.login-page .auth-main{padding-block:clamp(20px,5vh,48px)}
.login-page .auth-shell{min-height:0;margin:20px auto 40px}
.login-page .auth-story{min-height:560px;justify-content:center;gap:clamp(40px,8vh,72px)}
.auth-story::before,.auth-story::after{content:"";position:absolute;border:1px solid rgba(20,125,245,.16);border-radius:28px;transform:rotate(-8deg)}.auth-story::before{width:340px;height:230px;right:-50px;bottom:130px}.auth-story::after{width:240px;height:150px;right:45px;bottom:165px;transform:rotate(10deg)}
.auth-story-links{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:4px 24px;margin-top:18px}
.auth-story-links a{min-height:44px;display:inline-flex;align-items:center;color:var(--blue-strong);font-size:14px;font-weight:650;text-underline-offset:5px}
.auth-story-links a:hover{text-decoration:underline}
.auth-story h1{position:relative;z-index:1;max-width:440px;font-size:48px;line-height:1.06;letter-spacing:-.05em}.auth-story p{position:relative;z-index:1;max-width:430px;color:var(--muted);font-size:17px}.story-points{position:relative;z-index:1;display:grid;gap:10px}.story-point{display:flex;align-items:center;gap:10px}.story-point i{width:29px;height:29px;display:grid;place-items:center;border-radius:9px;background:var(--site-surface);color:var(--blue);font-style:normal;box-shadow:0 6px 16px rgba(40,72,112,.1)}
.auth-main{padding:48px;display:flex;align-items:center}.auth-card{width:100%;max-width:380px;margin:auto}.auth-card h2{font-size:30px;letter-spacing:-.04em;margin-bottom:6px}.auth-card>.muted{margin-bottom:24px}
.login-page .auth-card h2{margin-bottom:26px}
.account-unavailable{min-height:calc(100dvh - 230px);display:grid;place-items:center}.account-unavailable .content-card{width:min(520px,100%);padding:34px}.account-unavailable .button{margin-top:22px}
.account-section{margin-top:26px;scroll-margin-top:104px}
.account-section h2{margin-bottom:6px}
.account-section>p{margin-bottom:16px}
.account-unavailable .account-section .button{margin-top:4px}
.account-unavailable .button:disabled{opacity:.6;cursor:wait;transform:none}
.account-phone strong{overflow-wrap:anywhere}
.prototype-badge{display:inline-flex;padding:5px 9px;margin-bottom:17px;border-radius:999px;background:var(--site-warning-bg);color:var(--site-warning);font-size:11px;font-weight:720}
.segmented{position:relative;display:grid;grid-template-columns:1fr 1fr;height:46px;margin-bottom:22px;padding:4px;border:1px solid var(--line);border-radius:14px;background:var(--surface-muted)}
.segmented-indicator{position:absolute;left:4px;top:4px;width:calc(50% - 4px);height:36px;border-radius:9px;background:var(--site-surface);box-shadow:0 3px 10px rgba(31,42,61,.12);transition:transform 280ms var(--ease)}
.segmented[data-value="register"] .segmented-indicator{transform:translateX(100%)}
.segmented button{position:relative;z-index:1;border:0;background:transparent;border-radius:9px;font-weight:680;color:var(--muted);cursor:pointer}.segmented button[aria-selected="true"]{color:var(--text)}
.field{display:grid;gap:7px;margin-bottom:15px}.field label{font-size:13px;font-weight:680}.field-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px}.field input{width:100%;height:48px;padding:0 14px;border:1px solid var(--site-line);border-radius:13px;background:var(--site-surface);color:var(--text);outline:none;transition:border-color 160ms ease,box-shadow 160ms ease}.field input[aria-invalid="true"]{border-color:var(--red);box-shadow:0 0 0 4px rgba(229,72,77,.10)}
.field-hint,.muted{color:var(--muted);font-size:13px}.form-message{min-height:22px;margin:7px 0;color:var(--red);font-size:13px}.auth-card form>.button{width:100%;margin-top:6px}.terms{margin:14px 0 0;color:var(--muted);font-size:11px;text-align:center}.terms a{color:var(--blue-strong)}
.auth-method{display:flex;align-items:center;gap:24px;margin-bottom:16px}
.auth-method button{min-height:44px;padding:0;border:0;background:transparent;color:var(--muted);font-weight:650;cursor:pointer;white-space:nowrap;text-underline-offset:7px;text-decoration-thickness:2px}
.auth-method button[aria-selected="true"]{color:var(--blue-strong);text-decoration-line:underline}
.auth-method button:hover{color:var(--blue-strong)}
.password-row [data-toggle-password]{display:grid;place-items:center;align-self:center;width:44px;min-width:44px;height:44px;min-height:44px;padding:0;border:0;border-radius:8px;background:transparent;box-shadow:none;color:var(--muted);cursor:pointer;transform:none;flex:none}
.password-row [data-toggle-password]:hover{background:var(--surface-muted);color:var(--text)}
.password-row [data-toggle-password] svg{display:block;width:20px;height:20px;pointer-events:none}
.auth-secondary{display:block;margin:12px auto 0;padding:6px 10px;border:0;background:transparent;color:var(--blue-strong);font-size:13px;font-weight:650;cursor:pointer}.auth-secondary:hover{text-decoration:underline}.password-row{grid-template-columns:minmax(0,1fr) auto}.account-phone{margin:18px 0}.account-security{margin:26px 0 12px;padding-top:24px;border-top:1px solid var(--line)}.account-security h2{margin-bottom:5px}.account-security form{margin-top:14px}.account-security .button{margin-top:4px}.account-unavailable [data-profile-form]{margin-top:18px}
.dashboard{display:grid;grid-template-columns:240px minmax(0,1fr);gap:18px;align-items:start}.side-card,.content-card{border:1px solid var(--line);border-radius:22px;background:var(--surface);box-shadow:var(--shadow-small)}.side-card{position:sticky;top:88px;padding:12px}.account-summary{padding:12px 10px 18px;border-bottom:1px solid var(--line)}.avatar{width:52px;height:52px;display:grid;place-items:center;margin-bottom:10px;border-radius:16px;background:linear-gradient(145deg,#398fff,#795fe9);color:#fff;font-size:19px;font-weight:800;box-shadow:0 8px 18px rgba(55,109,220,.24)}.account-summary strong,.account-summary small{display:block}.account-summary small{color:var(--muted)}
.side-nav{display:grid;gap:3px;padding-top:8px}.side-nav a{height:42px;display:flex;align-items:center;gap:9px;padding:0 11px;border-radius:11px;color:var(--muted);font-weight:650}.side-nav a:hover,.side-nav a.active{background:var(--blue-soft);color:var(--blue-strong)}
.dashboard-main{display:grid;gap:16px}.content-card{padding:22px}.content-card h1{font-size:30px;letter-spacing:-.04em;margin-bottom:5px}.content-card h2{font-size:20px;letter-spacing:-.025em}.card-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:18px}.card-head h2,.card-head p{margin:0}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.stat{padding:16px;border:1px solid var(--line);border-radius:16px;background:var(--surface-muted)}.stat small,.stat strong{display:block}.stat small{color:var(--muted)}.stat strong{margin-top:3px;font-size:22px}.usage{display:grid;gap:12px}.usage-row{display:grid;grid-template-columns:120px 1fr 62px;align-items:center;gap:12px;font-size:13px}.usage-track{height:8px;border-radius:999px;background:var(--site-soft);overflow:hidden}.usage-fill{height:100%;width:var(--usage);border-radius:inherit;background:linear-gradient(90deg,#56a4ff,#147df5)}.usage-fill.warn{background:linear-gradient(90deg,#ffc04d,#e09314)}
.project-list{display:grid;gap:8px}.project{display:grid;grid-template-columns:44px 1fr auto;align-items:center;gap:12px;padding:10px;border:1px solid var(--line);border-radius:14px}.project-thumb{width:44px;height:44px;border-radius:11px;background:var(--site-soft);display:grid;place-items:center;color:var(--blue);font-weight:800}.project strong,.project small{display:block}.project small{color:var(--muted)}.empty{padding:26px;border:1px dashed var(--site-line);border-radius:16px;text-align:center;color:var(--muted)}
.setting-row{min-height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px;border-top:1px solid var(--line)}.setting-row:first-of-type{border-top:0}.setting-copy strong,.setting-copy small{display:block}.setting-copy small{color:var(--muted)}
.dialog{border:0;border-radius:22px;padding:0;background:transparent}.dialog::backdrop{background:rgba(19,27,39,.28);backdrop-filter:blur(4px)}.dialog-card{width:min(430px,calc(100vw - 32px));padding:22px;border:1px solid var(--site-line);border-radius:22px;background:var(--surface-solid);box-shadow:var(--shadow)}.dialog-card h2{margin-bottom:6px}.dialog-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:20px}
[hidden]{display:none!important}
@media(max-width:820px){.nav-links .nav-link:not(.nav-primary){display:none}.pricing-grid{grid-template-columns:1fr}.plan{min-height:auto}.faq{grid-template-columns:1fr}.auth-shell{grid-template-columns:1fr}.auth-story{display:none}.auth-main{padding:34px 24px;min-height:620px}.dashboard{grid-template-columns:1fr}.side-card{position:static}.side-nav{grid-template-columns:repeat(3,1fr)}.side-nav a{justify-content:center}.account-summary{display:none}.stat-grid{grid-template-columns:1fr 1fr}.section-head{display:block}.section-head p{margin-top:6px}}
@media(max-height:760px) and (min-width:821px){.login-page .auth-story{min-height:0;padding-block:28px;gap:32px}}
@media(max-width:820px){
 .login-page .auth-shell{min-height:0}
 .login-page .auth-story{display:flex;min-height:0;padding:24px 24px 0;gap:0;background:transparent}
 .login-page .auth-story::before,.login-page .auth-story::after,.login-page .story-points{display:none}
 .login-page .auth-story h1{max-width:none;margin-bottom:0;font-size:clamp(24px,5vw,32px);letter-spacing:-.04em}
 .login-page .auth-story-links{margin-top:10px}
 .login-page .auth-main{min-height:0;padding-top:20px}
}
@media(max-width:520px){.page{width:min(100% - 24px,var(--page));margin-top:14px}.app-nav{padding:8px}.app-nav-inner{width:100%;height:54px}.hero{padding:42px 4px 28px}.hero h1{font-size:40px}.nav-primary{display:inline-flex}.pricing-grid{gap:12px}.plan{padding:20px}.auth-shell{width:calc(100% - 20px);margin-top:14px}.auth-main{padding:28px 20px}.stat-grid{grid-template-columns:1fr}.content-card{padding:18px}.usage-row{grid-template-columns:92px 1fr 50px}.side-nav a{font-size:12px}.footer{width:calc(100% - 24px)}}
@media(max-width:520px){.login-page .auth-shell{margin-top:12px;margin-bottom:28px}.login-page .auth-story{padding:24px 20px 0}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation:none!important;transition-duration:.01ms!important}}
@media(prefers-contrast:more){:root{--line:rgba(0,0,0,.32)}.button,.plan,.content-card,.side-card{border-width:2px}}
@media(prefers-reduced-transparency:reduce){.app-nav-inner,.auth-shell{backdrop-filter:none;-webkit-backdrop-filter:none;background:var(--site-surface)}}