:root{color-scheme:light;--ink:#243e36;--muted:#708476;--green:#13766d;--deep:#123f36;--line:#dce6da;--paper:#f7f8f2;--gold:#b89c61}
*{box-sizing:border-box}
html{scroll-padding-top:120px;scrollbar-gutter:stable}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",sans-serif}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer}
button:disabled{cursor:not-allowed}
button:focus-visible,input:focus-visible,a:focus-visible{outline:3px solid #80b7a6;outline-offset:4px}
[hidden]{display:none!important}
.skip-link{position:fixed;top:-80px;left:16px;padding:12px;background:white;z-index:100}
.skip-link:focus{top:10px}
.account-header{min-height:88px;background:#fffefa;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:30px;padding:16px max(28px,calc((100vw - 1440px)/2));position:sticky;top:0;z-index:5}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand>span{height:48px;width:48px;display:grid;place-items:center;background:var(--green);border-radius:13px;box-shadow:0 5px 14px #13766d17}
.brand svg{width:35px;fill:none;stroke:#fff;stroke-width:2.8;stroke-linejoin:round}
.brand strong{font-family:"Songti SC",SimSun,serif;font-size:30px;letter-spacing:4px}
.brand small{display:block;font:8px/1.3 sans-serif;letter-spacing:2.6px;color:#93a294;margin-top:3px}
.site-nav{display:flex;align-items:center;gap:8px;overflow:auto;scrollbar-width:thin}
.site-nav a{white-space:nowrap;padding:13px 19px;font-size:14px;color:#667e6c;border-radius:10px}
.site-nav a[aria-current]{background:var(--deep);color:#fff;font-weight:700;box-shadow:0 4px 12px #123f3614}
.site-nav a:hover{background:#eaf0e5}
.site-nav a[aria-current]:hover{background:var(--deep)}
.account-shell{max-width:1440px;margin:auto;display:grid;grid-template-columns:236px minmax(0,1fr);gap:48px;padding:38px 28px 0}
.account-sidebar{position:sticky;top:126px;align-self:start}
.sidebar-identity{display:grid;justify-items:center;padding:26px 12px 30px;border-bottom:1px solid var(--line);gap:8px}
.avatar{height:66px;width:66px;border:1px solid #bdd4c4;background:#e7f0e5;display:grid;place-items:center;border-radius:22px;font-family:serif;font-size:32px;color:var(--green);margin-bottom:5px}
.sidebar-identity strong{font-size:16px}
.sidebar-identity>span{font:12px/1.6 ui-monospace,monospace;color:var(--muted)}
.account-sidebar nav{display:grid;gap:7px;margin-top:24px}
.account-sidebar nav a{display:flex;align-items:center;gap:15px;padding:14px 19px;font-size:14px;color:#6e8174;border-radius:9px}
.account-sidebar nav a>span{width:19px;text-align:center;font-size:18px;color:#8ba28d}
.account-sidebar nav a.selected{background:#e5eee1;color:var(--deep);font-weight:700;box-shadow:inset 3px 0 var(--green)}
.account-sidebar nav a:hover{background:#ecf1e7}
.sidebar-back{display:flex;justify-content:space-between;margin:29px 18px 0;padding-top:23px;border-top:1px solid var(--line);font-size:12px;color:#829584}
.account-main{min-width:0;padding-bottom:25px}
.page-heading{display:flex;align-items:center;justify-content:space-between;gap:24px;margin:11px 0 0}
.eyebrow{font:700 10px/1.6 sans-serif;letter-spacing:2px;color:var(--green)}
.page-heading h1{font-family:"Songti SC",SimSun,serif;font-size:36px;letter-spacing:3px;margin:9px 0}
.page-heading p{font-size:13px;color:var(--muted);margin:0}
.session-badge{flex-shrink:0;border:1px solid #cedecb;background:#eef5e9;color:#47794e;padding:8px 12px;border-radius:30px;font-size:11px}
.session-badge i{display:inline-block;background:#77a16f;width:6px;height:6px;border-radius:50%;margin-right:6px}
.notice{min-height:0;color:var(--green);font-size:12px;line-height:1.8;margin:12px 0}
.notice:empty{display:none}
.notice.error{color:#a24940}
.welcome-panel{margin:26px 0 23px;border:1px solid #1d594c;border-radius:16px;background:var(--deep);color:#fff;display:grid;grid-template-columns:1fr 38%;min-height:225px;overflow:hidden;padding:30px 34px;position:relative}
.welcome-panel .eyebrow{color:#a9c7ab}
.welcome-panel h2{font-family:"Songti SC",SimSun,serif;font-size:30px;font-weight:500;letter-spacing:2px;margin:12px 0}
.welcome-panel p{font-size:13px;color:#b7cebd}
.welcome-panel .primary{background:#eff3df;color:#285e4e;border-color:#eff3df;min-height:39px;display:inline-flex;gap:30px;font-size:12px;margin-top:12px}
.welcome-art{position:relative;min-width:0}
.welcome-art:before,.welcome-art:after{content:"";position:absolute;top:14px;left:5%;width:88%;height:130px;border:1px solid #789d80;border-radius:50%;transform:rotate(-30deg)}
.welcome-art:after{transform:rotate(30deg);border-color:#b8b575;border-style:dashed}
.welcome-art span,.welcome-art b{position:absolute;color:#c1d7be;font:italic 24px Georgia;z-index:1}
.welcome-art span{top:16px;left:20%}
.welcome-art b{top:108px;right:7%;font-weight:400}
.welcome-art i{width:10px;height:10px;border-radius:50%;background:#d4b172;position:absolute;right:11%;top:31px;z-index:2}
.welcome-art small{position:absolute;bottom:5px;right:0;white-space:nowrap;font:8px sans-serif;letter-spacing:1.5px;color:#89ab91}
.panel{border:1px solid var(--line);background:#fffefa;border-radius:13px;padding:25px 29px;margin-bottom:25px}
.section-title{display:flex;justify-content:space-between;gap:16px;align-items:center;margin-bottom:21px}
.section-title>div{display:flex;gap:12px;align-items:center;min-width:0}
.section-title h2{font-size:17px;margin:0;font-weight:600;letter-spacing:.5px}
.section-index{font:11px ui-monospace,monospace;color:#a5b299}
.quiet-tag{color:#8c9c8d;font-size:10px;white-space:nowrap}
.profile-grid{display:grid;grid-template-columns:repeat(4,1fr);margin:0}
.profile-grid>div{padding-left:23px;border-left:1px solid #e5eadd}
.profile-grid>div:first-child{padding-left:0;border:0}
.profile-grid dt{font-size:12px;color:#8c9b8c;margin-bottom:10px}
.profile-grid dd{font:14px/1.5 ui-monospace,monospace;margin:0;color:#315347;overflow-wrap:anywhere}
.outside{margin-top:31px;margin-bottom:16px}
.section-note{font-size:12px;color:#748773;line-height:1.8}
.learning-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:13px;margin-bottom:23px}
.learning-card{border:1px solid var(--line);background:#fffefa;border-radius:12px;padding:23px 20px 20px;position:relative;transition:transform .15s,border-color .15s}
.learning-card:hover{transform:translateY(-3px);border-color:#98bca4}
.learning-icon{font-size:25px;line-height:1;color:#618f74}
.learning-card h3{font-size:14px;margin:17px 0 8px}
.learning-card p{font-size:13px;color:#718570;line-height:1.7;margin:0;min-height:34px}
.card-arrow{display:block;text-align:right;color:#88a28c;font-size:17px;margin-top:15px}
.saved-panel .section-title{margin-bottom:10px}
.count{background:#eef4e8;color:#638a63;font:11px ui-monospace,monospace;border-radius:4px;padding:3px 7px}
.text-link{font-size:12px;color:#66866b;white-space:nowrap}
.text-link span{margin-left:5px}
.saved-lessons{list-style:none;padding:0;margin:12px 0 0}
.saved-lessons li{display:flex;align-items:center;gap:13px;padding:13px 0;border-top:1px solid #edf0e8}
.lesson-symbol{font-size:23px;color:#86a489}
.saved-lessons li>div{display:grid;gap:6px;flex:1;min-width:0}
.saved-lessons strong{font-size:13px;font-weight:500;overflow-wrap:anywhere}
.saved-lessons li>div>span,.local-tag{font-size:12px;color:#94a390}
.empty-state{display:flex;align-items:center;gap:16px;padding:23px 0 8px}
.empty-state>span{font-size:31px;color:#a4b99f}
.empty-state>div{flex:1}
.empty-state strong{font-size:13px;font-weight:500;color:#6e8470}
.empty-state p{font-size:12px;color:#778971;margin:8px 0}
.empty-state a{font-size:12px;color:#61876a;white-space:nowrap}
.draft-note{padding:11px 14px;background:#f2f6eb;color:#6e875e;border-radius:6px;font-size:12px;line-height:1.8}
.setting-row{display:flex;align-items:center;gap:15px;border-top:1px solid #edf0e8;padding:19px 0}
.setting-symbol{width:34px;height:34px;display:grid;place-items:center;background:#eff4e9;color:#6c9475;border-radius:8px;font-size:22px}
.setting-copy{flex:1}
.setting-copy h3,.third-party h3{margin:0 0 7px;font-size:14px;font-weight:600}
.setting-copy p,.third-party p{font-size:12px;color:#73866e;margin:0;line-height:1.7}
.secondary,.primary{border-radius:7px;min-height:42px;padding:0 15px;font-size:12px;font-weight:600}
.secondary{white-space:nowrap;background:#f0f5e9;border:1px solid #cbdec9;color:#407151}
.primary{background:var(--green);border:1px solid var(--green);color:white;text-align:left;display:flex;justify-content:space-between;align-items:center;gap:20px}
.primary:hover{background:#0d6159}
.enabled-tag{font-size:10px;color:#66935e;white-space:nowrap}
.third-party{display:grid;grid-template-columns:1fr 1fr;gap:20px;border-top:1px solid #edf0e8;padding-top:20px}
.third-party-items{display:flex;gap:10px}
.third-party button{border:1px solid #e4eadd;background:#fbfcf7;border-radius:7px;padding:10px 13px;display:flex;gap:8px;align-items:center;flex:1;color:#9aab96}
.third-party button>span{border:1px solid #dbe5d4;border-radius:5px;width:22px;height:22px;display:grid;place-items:center;font:12px serif}
.third-party strong{font-size:11px;font-weight:500}
.third-party small{font-size:9px;white-space:nowrap}
.bind-panel{border:1px solid #d9e6d2;border-radius:9px;background:#f7faf1;padding:20px;margin-bottom:18px}
.bind-heading{display:flex;align-items:start;justify-content:space-between}
.bind-heading h3{font-size:14px;margin:0}
.bind-heading p{font-size:12px;color:#83977d;line-height:1.7;margin:8px 0 17px}
.close-button{border:0;background:transparent;font-size:22px;color:#879b80}
.bind-panel form{max-width:440px;display:grid;gap:10px}
.bind-panel label{font-size:12px;font-weight:600;margin-top:5px}
.bind-panel input{width:100%;height:40px;border:1px solid #cadcc3;background:#fffefa;border-radius:6px;padding:0 12px;font-size:14px;color:var(--ink);min-width:0}
.bind-panel input::placeholder{color:#a7b69f}
.code-row{display:flex;gap:9px}
.bind-panel .primary{margin-top:4px}
.help-strip{display:flex;align-items:center;gap:25px;padding:4px 4px 20px}
.help-strip>div{flex:1}
.help-strip h2{font-size:13px;margin:0 0 9px}
.help-strip p{font-size:12px;line-height:1.9;color:#73856e;max-width:600px;margin:0}
.logout-button{border:1px solid #d5dfce;background:transparent;padding:11px 15px;border-radius:7px;font-size:12px;color:#7b8b76;white-space:nowrap}
.logout-button span{margin-left:9px}
.account-footer{display:flex;justify-content:space-between;padding-top:18px;border-top:1px solid var(--line);font-size:9px;color:#a6b2a0}
.unavailable-panel{margin-top:30px}
.unavailable-panel h2{font-size:19px}
.unavailable-panel p{color:var(--muted);font-size:13px}
.unavailable-panel .primary{display:inline-flex}
.welcome-panel,.panel,.learning-card{animation:arrive .3s ease-out}
@keyframes arrive{from{opacity:0;transform:translateY(5px)}
to{opacity:1;transform:translateY(0)}
}
@media(max-width:1120px){.account-header{padding:14px 22px;gap:20px}
.site-nav a{padding:12px;font-size:12px}
.account-shell{grid-template-columns:190px minmax(0,1fr);gap:28px;padding:26px 22px 0}
.profile-grid{grid-template-columns:repeat(2,1fr);row-gap:22px}
.profile-grid>div:nth-child(3){padding-left:0;border:0}
.learning-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.learning-card p{min-height:0}
.card-arrow{position:absolute;right:20px;top:12px}
.welcome-art small{display:none}
.third-party{grid-template-columns:1fr}
.panel{padding:23px}
.page-heading h1{font-size:31px}
}
@media(max-width:760px){html{scroll-padding-top:140px}
.account-header{position:static;display:block;padding:16px 18px 0}
.brand{margin-bottom:15px}
.brand>span{width:42px;height:42px}
.brand strong{font-size:25px}
.site-nav{margin:0 -18px;padding:0 12px 12px;gap:3px}
.site-nav a{padding:11px 13px}
.account-shell{display:block;padding:25px 18px 0}
.account-sidebar{position:static}
.sidebar-identity,.sidebar-back{display:none}
.account-sidebar nav{display:flex;gap:5px;overflow:auto;margin:0 0 25px;padding-bottom:5px}
.account-sidebar nav a{white-space:nowrap;gap:6px;padding:10px 13px;font-size:11px}
.account-sidebar nav a>span{font-size:14px;width:15px}
.page-heading{gap:12px}
.page-heading h1{font-size:29px}
.page-heading p{font-size:13px}
.session-badge{font-size:9px;padding:7px 9px}
.welcome-panel{padding:24px;grid-template-columns:1fr;min-height:0;margin:22px 0 18px}
.welcome-panel h2{font-size:25px}
.welcome-art{display:none}
.panel{padding:21px;margin-bottom:20px}
.section-title{gap:10px}
.section-title h2{font-size:15px}
.quiet-tag,.outside>.section-note{display:none}
.profile-grid dd{font-size:14px}
.learning-grid{gap:10px}
.learning-card{padding:20px 16px}
.learning-card h3{font-size:13px}
.learning-card p{font-size:12px}
.saved-panel .section-title{align-items:start}
.saved-panel .section-title>div{flex-wrap:wrap;gap:8px}
.text-link{font-size:12px;line-height:1.6}
.empty-state{align-items:start;flex-wrap:wrap}
.empty-state>div{flex-basis:calc(100% - 50px)}
.empty-state a{margin-left:47px}
.setting-row{gap:10px;flex-wrap:wrap}
.setting-copy p{font-size:12px}
.setting-row .secondary{margin-left:44px}
.setting-row .enabled-tag{margin-left:44px}
.third-party-items{flex-wrap:wrap}
.third-party button{min-width:100%;justify-content:flex-start}
.help-strip{display:block;padding:0 3px 20px}
.logout-button{margin-top:17px}
.account-footer{font-size:8px}
.section-title.outside{margin-top:26px}
.bind-panel{padding:15px}
.bind-panel .code-row{gap:7px}
.bind-panel .secondary{padding:0 11px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}
.welcome-panel,.panel,.learning-card{animation:none}
.learning-card{transition:none}
}

.access-heading{display:flex;align-items:center;justify-content:space-between;gap:15px}.access-heading strong{font-family:"Songti SC",SimSun,serif;font-size:20px;font-weight:500;color:var(--green)}.access-details{display:grid;grid-template-columns:1fr 1fr;gap:20px;padding:20px 0;margin:0}.access-details dt{color:var(--muted);font-size:12px;margin-bottom:9px}.access-details dd{font-size:14px;margin:0;line-height:1.7}.access-redeem{max-width:580px;margin:0 0 18px;display:grid;gap:10px}.access-redeem label{font-size:13px;font-weight:600}.access-redeem input{min-width:0;width:100%;border:1px solid #cadcc3;border-radius:7px;background:#fbfcf8;padding:12px;color:var(--ink);font-family:ui-monospace,monospace}.access-panel .section-note{margin-bottom:0}.demo-note{border-left:2px solid #bf9652;padding:8px 12px;background:#fbf6e8;color:#8a692e;font-size:12px;line-height:1.8;margin-bottom:0}@media(max-width:760px){.access-heading{align-items:flex-start;flex-direction:column}.access-details{grid-template-columns:1fr}.access-redeem .code-row{flex-wrap:wrap}.access-redeem input{flex-basis:100%}}

.account-overview{display:grid;grid-template-columns:1fr 1.2fr;border:1px solid #cfded2;border-radius:16px;background:#fffefa;margin:24px 0;overflow:hidden;animation:arrive 150ms ease-out}
.account-main{min-height:calc(100vh - 120px)}
.account-page[hidden]{display:none!important}
.access-redeem .code-row .primary{white-space:nowrap;flex-shrink:0}
.overview-identity{padding:30px;align-self:center;min-width:0}
.overview-identity h2{font:600 28px/1.4 ui-monospace,monospace;letter-spacing:1px;margin:11px 0 17px;color:var(--deep)}
.account-id-row{display:flex;align-items:center;flex-wrap:wrap;gap:9px;font-size:13px;color:var(--muted)}
#account-id{font:600 14px/1.6 ui-monospace,monospace;color:var(--deep);user-select:all;cursor:text}
.copy-button{border:1px solid #c9dccc;border-radius:6px;background:#f5f8ef;color:var(--green);min-height:36px;padding:5px 11px;font-size:12px}
.identity-note{font-size:12px;line-height:1.8;color:var(--muted);margin:15px 0 0}
.overview-identity .text-link{display:inline-block;margin-top:12px}
.overview-access{background:#edf4e9;border-left:1px solid #dce6da;padding:27px 30px;min-width:0}
.access-state{display:inline-flex;align-items:center;gap:7px;font-size:14px;color:#34664f}
.access-state:before{content:"";width:7px;height:7px;border-radius:50%;background:#84a68b}
.access-state[data-state="inactive"]{color:#8a6936}
.access-state[data-state="inactive"]:before{background:#bd9658}
.overview-access .access-details{grid-template-columns:1fr;gap:12px;padding:18px 0}
.overview-access .access-details>div{display:grid;grid-template-columns:105px 1fr;gap:10px;align-items:baseline}
.overview-access .access-details dt{margin:0}
.overview-access .access-details dd{font-size:14px;font-weight:500;overflow-wrap:anywhere}
.overview-access .primary{width:100%;min-height:46px;justify-content:center;font-size:14px}
.overview-access .section-note{font-size:12px;margin:10px 0 0}
.account-dates{grid-column:1/-1;padding:14px 30px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}
.account-dates summary,.access-rules summary{cursor:pointer;line-height:1.7}
.account-dates .profile-grid{grid-template-columns:1fr 1fr;margin:18px 0 5px}
.account-dates .section-note{margin-bottom:0}
.access-panel .section-title{margin-bottom:12px}
.access-panel .section-title .secondary{font-size:12px;min-height:36px}
.access-panel>.section-note{margin:0 0 15px}
.access-rules{border-top:1px solid var(--line);padding-top:14px;margin-top:15px;font-size:12px;color:var(--muted)}
.access-rules .section-note{margin-top:10px}
fieldset{border:0;padding:0;margin:0;min-width:0;display:grid;gap:10px}
fieldset:disabled{opacity:.68}
.password-verification{display:grid;gap:8px;min-width:0}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
input[aria-invalid="true"]{border-color:#b56a56;box-shadow:0 0 0 2px #b56a5614}
button[aria-busy="true"]{cursor:wait;opacity:.7}
.bind-panel:not([hidden]){animation:arrive 150ms ease-out}
.account-overview,.panel,.learning-card{animation-duration:150ms}
.copy-button,.secondary,.primary,fieldset{transition:background-color 150ms,border-color 150ms,opacity 150ms}
@media(max-width:1120px){.account-overview{grid-template-columns:1fr}.overview-identity{padding:24px}.overview-access{border-left:0;border-top:1px solid var(--line);padding:24px}.account-dates{padding:14px 24px}}
@media(max-width:760px){.account-shell{padding-top:16px}.account-sidebar nav{margin-bottom:16px}.page-heading{margin-top:0}.page-heading h1{font-size:27px;margin:6px 0}.page-heading .eyebrow{font-size:9px}.page-heading p{font-size:12px}.account-overview{margin:18px 0}.overview-identity{padding:20px 21px 16px}.overview-identity h2{font-size:25px;margin:5px 0 10px}.identity-note{margin-top:9px}.overview-access{padding:18px 21px}.overview-access .access-details{padding:12px 0;gap:8px}.overview-access .access-details>div{grid-template-columns:95px 1fr;gap:8px}.overview-access .access-details dd{font-size:13px}.account-dates{padding:12px 21px}.account-dates .profile-grid{gap:16px;grid-template-columns:1fr}.account-dates .profile-grid>div{border:0;padding:0}.account-dates .profile-grid dt{margin-bottom:5px}.overview-access .section-note{font-size:12px}.account-main .access-panel{padding:20px 21px}.access-redeem .code-row .primary{width:100%;justify-content:center;min-height:44px}.access-panel .section-title h2{font-size:15px}.access-panel .section-title .secondary{padding:0 10px}.account-main .session-badge{font-size:10px}.account-main .access-redeem input{min-height:46px}.account-main .bind-panel input{min-height:44px}}
@media(prefers-reduced-motion:reduce){.account-overview,.panel,.learning-card,.bind-panel:not([hidden]){animation:none}.copy-button,.secondary,.primary,fieldset{transition:none}}
@media(max-width:760px){.overview-access .access-details>div:last-child{grid-template-columns:1fr;gap:3px}}