:root{
  --bg:#f3f2ef;
  --bg-2:#f7f6f3;
  --surface:#ffffff;
  --surface-2:#fbfaf8;
  --ink:#23272b;
  --ink-2:#5b6167;
  --ink-3:#9aa1a6;
  --line:#e7e6e1;
  --line-2:#efeee9;

  --green:#5fbb8a;
  --green-deep:#3f9d6b;
  --green-soft:#cfe7d8;
  --sage:#a9cb9b;
  --sage-soft:#e4eee0;

  --blue:#4a90d9;
  --blue-soft:#e3eefb;
  --orange:#e8a04b;
  --orange-soft:#fbeedd;
  --red:#9c4b3f;
  --red-soft:#f0ded9;

  --shadow-sm:0 1px 2px rgba(24,32,26,.05),0 2px 8px rgba(24,32,26,.04);
  --shadow-md:0 6px 24px rgba(24,32,26,.08);
  --shadow-lg:0 20px 60px rgba(24,32,26,.16);

  --radius:16px;
  --radius-sm:10px;
  --radius-lg:28px;

  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--ink);
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(95,187,138,.10), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(74,144,217,.07), transparent 55%),
    var(--bg);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
img,svg{display:block}
::selection{background:rgba(95,187,138,.28)}

.wrap{max-width:1280px;margin:0 auto;padding:0 28px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ---------- Top bar ---------- */
.topbar{
  position:sticky;top:0;z-index:50;
  backdrop-filter:saturate(160%) blur(14px);
  background:rgba(247,246,243,.82);
  border-bottom:1px solid var(--line);
}
.topbar__in{display:flex;align-items:center;gap:26px;height:62px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand__mark{width:34px;height:34px;flex-shrink:0}
.brand__emblem{width:38px;height:38px;flex-shrink:0;border-radius:50%;box-shadow:0 0 0 1px var(--line);background:#fff}
.brand__name{font-weight:800;font-size:19px;letter-spacing:.5px;line-height:1}
.brand__sub{font-size:10.5px;color:var(--ink-3);letter-spacing:.14em;text-transform:uppercase;margin-top:3px}
.nav{display:flex;gap:4px;margin-left:6px;flex:1}
.nav a{
  position:relative;padding:8px 14px;font-size:14.5px;color:var(--ink-2);
  border-radius:10px;transition:.2s;
}
.nav a:hover{color:var(--ink);background:rgba(0,0,0,.035)}
.nav a.on{color:var(--ink);font-weight:700}
.nav a.on::after{
  content:"";position:absolute;left:14px;right:14px;bottom:1px;height:3px;border-radius:3px;
  background:linear-gradient(90deg,var(--green),var(--green-deep));
}
.topbar__right{display:flex;align-items:center;gap:14px;flex-shrink:0}
.search{
  display:flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);
  padding:7px 12px;border-radius:999px;width:210px;color:var(--ink-3);transition:.2s;
}
.search:focus-within{border-color:var(--green);box-shadow:0 0 0 3px rgba(95,187,138,.15)}
.search input{border:0;outline:0;background:transparent;font-size:13.5px;width:100%;color:var(--ink)}
.icon-btn{
  width:38px;height:38px;border-radius:12px;border:1px solid var(--line);background:#fff;
  display:grid;place-items:center;color:var(--ink-2);transition:.2s;
}
.icon-btn:hover{color:var(--ink);transform:translateY(-1px);box-shadow:var(--shadow-sm)}
.avatar{
  width:38px;height:38px;border-radius:50%;overflow:hidden;border:2px solid #fff;
  box-shadow:0 0 0 1px var(--line);cursor:pointer;background:linear-gradient(135deg,#f3c77e,#e89a5b);
}
.avatar img{width:100%;height:100%;object-fit:cover}

/* ---------- Shell (content + sidebar) ---------- */
.shell{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:26px;padding:26px 0 60px}

/* ---------- Landing hero ---------- */
.hero{
  position:relative;min-height:min(78vh,640px);display:flex;align-items:center;
  overflow:hidden;border-radius:var(--radius-lg);
  margin:8px 0 40px;border:1px solid rgba(255,255,255,.6);
  box-shadow:var(--shadow-md);
  background:
    linear-gradient(115deg,#fbfaf8 0%,#eef1ec 46%,#e4ece5 100%);
}
.hero__grid{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(35,39,43,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(35,39,43,.035) 1px,transparent 1px);
  background-size:46px 46px;
  mask-image:radial-gradient(80% 80% at 60% 40%,#000 30%,transparent 78%);
  -webkit-mask-image:radial-gradient(80% 80% at 60% 40%,#000 30%,transparent 78%);
}
.glow{position:absolute;border-radius:50%;filter:blur(70px);opacity:.7;animation:float 14s ease-in-out infinite}
.glow--a{width:400px;height:400px;background:radial-gradient(circle,rgba(95,187,138,.5),transparent 65%);top:-120px;right:6%}
.glow--b{width:340px;height:340px;background:radial-gradient(circle,rgba(232,160,75,.4),transparent 65%);bottom:-100px;left:-60px;animation-delay:-6s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-26px)}}

.hero__inner{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:30px;align-items:center;width:100%;padding:60px clamp(28px,5vw,72px)}
.hero__left{animation:rise .9s cubic-bezier(.2,.7,.2,1) both .05s}
.hero__badge{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;color:var(--green-deep);
  background:rgba(255,255,255,.7);border:1px solid rgba(95,187,138,.35);
  padding:6px 13px;border-radius:999px;margin-bottom:22px;backdrop-filter:blur(4px);
}
.hero__badge .dot{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 0 4px rgba(95,187,138,.2);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 3px rgba(95,187,138,.25)}50%{box-shadow:0 0 0 7px rgba(95,187,138,.05)}}
.hero h1{
  font-size:clamp(34px,4.4vw,56px);line-height:1.08;margin:0 0 14px;font-weight:800;letter-spacing:.5px;
}
.hero h1 .me{background:linear-gradient(120deg,var(--green-deep),var(--green));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero__en{
  font-size:13px;letter-spacing:.22em;text-transform:uppercase;color:var(--ink-2);
  font-weight:600;margin-bottom:18px;max-width:560px;
}
.hero__tag{
  font-size:16.5px;line-height:1.65;color:var(--ink-2);max-width:560px;margin-bottom:30px;
}
.hero__btns{display:flex;gap:14px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:9px;font-size:15px;font-weight:600;
  padding:13px 26px;border-radius:999px;border:1px solid transparent;transition:.22s;
}
.btn--dark{background:var(--ink);color:#fff}
.btn--dark:hover{background:#111;transform:translateY(-2px);box-shadow:var(--shadow-md)}
.btn--ghost{background:rgba(255,255,255,.75);color:var(--ink);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--ink-2);transform:translateY(-2px)}
.btn--green{background:linear-gradient(135deg,var(--green),var(--green-deep));color:#fff}
.btn--green:hover{box-shadow:0 10px 26px rgba(63,157,107,.4);transform:translateY(-2px)}
.btn--blue{background:linear-gradient(135deg,#5a9be0,#3f7fd0);color:#fff;width:100%;justify-content:center}
.btn--blue:hover{box-shadow:0 10px 26px rgba(74,144,217,.4);transform:translateY(-2px)}
.btn__arrow{transition:.2s}
.btn:hover .btn__arrow{transform:translateX(3px)}

.hero__right{display:grid;place-items:center;animation:rise .9s cubic-bezier(.2,.7,.2,1) both .18s}
.seal{width:clamp(180px,24vw,280px);height:auto;filter:drop-shadow(0 14px 30px rgba(156,75,63,.28));animation:sealSpin 40s linear infinite}
@keyframes sealSpin{from{transform:rotate(0)}to{transform:rotate(360deg)}}

.pulse-line{position:absolute;left:0;right:0;bottom:12%;height:60px;z-index:1;opacity:.5}
@keyframes rise{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}

/* data chips on landing */
.hero__stats{display:flex;gap:40px;margin-top:38px;flex-wrap:wrap}
.hero__stat b{font-size:26px;font-weight:800;display:block}
.hero__stat span{font-size:12.5px;color:var(--ink-3)}

/* ---------- Section heading ---------- */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin:0 0 18px}
.sec-head h2{font-size:24px;font-weight:800;margin:0;letter-spacing:.4px}
.sec-head .sub{color:var(--ink-3);font-size:13px;margin-top:5px}
.sec-head .more{font-size:13.5px;color:var(--ink-2);display:inline-flex;align-items:center;gap:6px}
.sec-head .more:hover{color:var(--green-deep)}

/* ---------- Cards ---------- */
.card{
  background:var(--surface);border:1px solid var(--line-2);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);transition:transform .25s,box-shadow .25s,border-color .25s;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--line)}

/* ---------- Dashboard ---------- */
.greet-card{
  background:linear-gradient(160deg,#ffffff,#eef3ec);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-md);padding:26px 30px;margin-bottom:22px;position:relative;overflow:hidden;
}
.greet-card::after{content:"";position:absolute;right:-40px;top:-40px;width:220px;height:220px;border-radius:50%;background:radial-gradient(circle,rgba(95,187,138,.22),transparent 65%)}
.greet-card h1{font-size:30px;font-weight:800;margin:0 0 20px}
.clock-row{display:grid;grid-template-columns:minmax(0,1fr) 230px;gap:22px;align-items:stretch}
.clock-box{
  background:#fff;border-radius:20px;padding:22px 26px;box-shadow:var(--shadow-sm);
  display:flex;flex-direction:column;justify-content:center;min-height:200px;
}
.clock{font-size:52px;font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:1px}
.clock small{font-size:20px;color:var(--ink-2);font-weight:600}
.clock-meta{color:var(--ink-3);font-size:13px;margin-top:10px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.weather{display:inline-flex;align-items:center;gap:6px;color:var(--ink-2);font-weight:600}
.motto{margin-top:14px;color:var(--ink-2);font-size:14.5px;letter-spacing:.08em}
.greet-card .btn--ghost{margin-top:18px;align-self:flex-start}
.live-card{
  background:linear-gradient(150deg,#eaf2e7,#f3f7ef);border-radius:20px;padding:22px 24px;position:relative;overflow:hidden;
  display:flex;flex-direction:column;justify-content:space-between;min-height:200px;box-shadow:var(--shadow-sm);
}
.live-card__head{display:flex;justify-content:space-between;align-items:center;position:relative;z-index:2}
.live-card__head b{font-size:16px}
.live-card__meta{font-size:12px;color:var(--ink-3)}
.live-card .pill{background:var(--sage);color:#2f5334;border-radius:999px;padding:6px 14px;font-size:13px;font-weight:700}
.live-card__footer{display:flex;justify-content:space-between;align-items:flex-end;position:relative;z-index:2}
.flower{position:absolute;opacity:.5;animation:spin 26s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

.mini-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:22px}
.mini-stat{display:flex;align-items:center;gap:14px;padding:18px 20px}
.mini-stat .ic{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;flex-shrink:0}
.mini-stat b{font-size:22px;font-weight:800;display:block;line-height:1}
.mini-stat span{font-size:12.5px;color:var(--ink-3)}
.mini-stat .trend{font-size:11px;margin-left:auto;color:var(--green-deep);font-weight:700}
.ic--g{background:var(--sage-soft);color:var(--green-deep)}
.ic--b{background:var(--blue-soft);color:var(--blue)}
.ic--o{background:var(--orange-soft);color:var(--orange)}
.ic--r{background:var(--red-soft);color:var(--red)}

/* entrance grid */
.entry-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.entry{
  padding:26px 22px;display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center;
}
.entry .thumb{width:58px;height:58px;border-radius:16px;display:grid;place-items:center;margin-bottom:10px;transition:.25s}
.entry b{font-size:16px}
.entry p{font-size:12.5px;color:var(--ink-3);margin:0}
.entry:hover .thumb{transform:translateY(-4px) scale(1.03)}

/* ---------- Course cards ---------- */
.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.course{
  padding:20px;display:flex;flex-direction:column;gap:14px;background:var(--surface);
}
.course__top{display:flex;gap:14px;align-items:flex-start}
.course__icon{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;flex-shrink:0;color:#fff;font-weight:800;font-size:18px;letter-spacing:.5px}
.course__title{font-size:15.5px;font-weight:700;line-height:1.4;margin:0}
.course__meta{font-size:12px;color:var(--ink-3);margin-top:4px}
.course__desc{font-size:13px;color:var(--ink-2);line-height:1.65;flex:1}
.course__foot{display:flex;align-items:center;justify-content:space-between;padding-top:12px;border-top:1px dashed var(--line)}
.course__tag{font-size:11.5px;padding:4px 10px;border-radius:999px;font-weight:600}
.course__hours{font-size:12px;color:var(--ink-3)}

/* banner trio */
.banner-trio{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:26px}
.banner{
  position:relative;height:170px;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);
  display:flex;align-items:flex-end;padding:20px;transition:.25s;
}
.banner:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.banner h3{position:relative;z-index:2;margin:0;color:#fff;font-size:18px;font-weight:800;text-shadow:0 2px 8px rgba(0,0,0,.4)}
.banner p{position:relative;z-index:2;margin:4px 0 0;color:rgba(255,255,255,.82);font-size:12.5px;text-shadow:0 1px 6px rgba(0,0,0,.4)}
.banner .banner__art{position:absolute;inset:0;z-index:1}
.banner__badge{position:absolute;top:16px;left:16px;z-index:2;font-size:11px;color:#fff;background:rgba(255,255,255,.2);backdrop-filter:blur(6px);padding:4px 10px;border-radius:999px;border:1px solid rgba(255,255,255,.35)}

/* ---------- Sidebar (leaderboard) ---------- */
.side{position:sticky;top:86px;height:fit-content;display:flex;flex-direction:column;gap:18px}
.leaderboard{padding:20px}
.leaderboard h3{font-size:15px;font-weight:800;margin:0 0 16px;display:flex;align-items:center;gap:8px}
.lb-item{display:flex;align-items:center;gap:12px;padding:9px 0}
.lb-rank{
  width:24px;height:24px;border-radius:8px;font-size:12px;font-weight:800;display:grid;place-items:center;
  color:var(--ink-3);background:var(--surface-2);flex-shrink:0;
}
.lb-rank.top{background:linear-gradient(135deg,#f6c46a,#ef9f47);color:#fff}
.lb-rank.two{background:#e7edf5;color:#5a7ca8}
.lb-rank.three{background:#f2e5df;color:#b07a63}
.lb-ava{width:34px;height:34px;border-radius:50%;object-fit:cover;flex-shrink:0}
.lb-info{flex:1;min-width:0}
.lb-info b{font-size:13.5px;font-weight:700;display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lb-info span{font-size:11.5px;color:var(--ink-3)}
.lb-pts{font-size:13px;font-weight:800;color:var(--ink-2)}
.side .card--cta{padding:22px;background:linear-gradient(150deg,#eef5ec,#fff);border-radius:var(--radius);border:1px solid var(--line-2)}
.side .card--cta h4{margin:0 0 6px;font-size:15px}
.side .card--cta p{margin:0 0 14px;font-size:12.5px;color:var(--ink-2);line-height:1.6}

/* ---------- Filters / tabs ---------- */
.filterbar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:20px}
.chip{
  border:1px solid var(--line);background:#fff;color:var(--ink-2);font-size:13px;font-weight:600;
  padding:8px 16px;border-radius:999px;transition:.2s;
}
.chip:hover{border-color:var(--green);color:var(--ink)}
.chip.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.chip i{font-style:normal;font-size:11px;margin-left:5px;opacity:.7}

.tabs{display:inline-flex;gap:4px;background:#fff;border:1px solid var(--line);padding:5px;border-radius:999px}
.tab{padding:8px 18px;border-radius:999px;font-size:14px;font-weight:600;color:var(--ink-2);transition:.2s}
.tab.on{background:var(--ink);color:#fff}
.tab .dot{display:inline-block;width:7px;height:7px;border-radius:50%;margin-right:7px}
.tab--med .dot{background:#e0674f}
.tab--eng .dot{background:#4a90d9}
.tab--mix .dot{background:#e8a04b}

.path-title{text-align:center;padding:34px 0 24px}
.path-title h1{font-size:32px;font-weight:800;margin:0 0 10px}
.path-title p{color:var(--ink-3);font-size:14px;margin:0}
.path-title .tabs{margin-top:18px}
.year-label{display:flex;align-items:center;gap:14px;margin:8px 0 18px}
.year-label b{font-size:20px;font-weight:800}
.year-label span{font-size:12px;color:var(--ink-3)}
.year-label .rule{flex:1;height:1px;background:var(--line)}

/* ---------- Course detail ---------- */
.detail{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:26px;align-items:start}
.detail__main{display:flex;flex-direction:column;gap:22px}
.crumb{font-size:13px;color:var(--ink-3);display:flex;gap:8px;align-items:center;margin-bottom:2px}
.crumb a:hover{color:var(--green-deep)}
.course-title-h1{font-size:26px;font-weight:800;margin:6px 0 4px}
.course-meta-line{display:flex;gap:18px;flex-wrap:wrap;color:var(--ink-3);font-size:13px;margin-bottom:18px}

.dtabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:22px}
.dtab{padding:12px 18px;font-size:14.5px;color:var(--ink-2);position:relative;font-weight:600}
.dtab.on{color:var(--ink);font-weight:800}
.dtab.on::after{content:"";position:absolute;left:14px;right:14px;bottom:-1px;height:3px;background:var(--green);border-radius:3px}

.info-card{padding:24px;background:var(--surface)}
.info-card h3{font-size:15px;font-weight:800;margin:0 0 18px}
.teacher-row{display:flex;align-items:center;gap:14px;margin-bottom:20px}
.teacher-row img{width:52px;height:52px;border-radius:50%;object-fit:cover}
.teacher-row b{font-size:15px;display:block}
.teacher-row span{font-size:12.5px;color:var(--ink-3)}
.info-list{display:flex;flex-direction:column;gap:12px;margin-bottom:20px}
.info-item{display:flex;justify-content:space-between;font-size:13.5px}
.info-item span{color:var(--ink-3)}
.info-item b{font-weight:700}
.req-box{background:var(--surface-2);border:1px solid var(--line-2);border-radius:12px;padding:14px 16px;font-size:13px;color:var(--ink-2);line-height:1.7;margin-bottom:20px}
.progress-wrap{margin-top:8px}
.progress-label{display:flex;justify-content:space-between;font-size:12.5px;color:var(--ink-2);margin-bottom:8px}
.bar{height:8px;border-radius:999px;background:var(--line-2);overflow:hidden}
.bar i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--green),var(--green-deep));width:0;transition:width 1.2s cubic-bezier(.2,.7,.2,1)}

/* section list of learning units */
.unit{display:flex;gap:16px;padding:18px;align-items:center}
.unit .num{width:34px;height:34px;border-radius:10px;background:var(--surface-2);display:grid;place-items:center;font-weight:800;font-size:14px;color:var(--ink-2);flex-shrink:0}
.unit.done .num{background:var(--sage-soft);color:var(--green-deep)}
.unit b{font-size:15px}
.unit span{font-size:12.5px;color:var(--ink-3);display:block;margin-top:3px}
.unit .play{margin-left:auto;width:38px;height:38px;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;color:var(--ink-2);transition:.2s}
.unit:hover .play{background:var(--green);color:#fff;border-color:var(--green)}

/* ---------- Footer ---------- */
.footer{border-top:1px solid var(--line);padding:34px 0;margin-top:20px;color:var(--ink-3);font-size:13px}
.footer__in{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:center}
.footer b{color:var(--ink-2)}

/* ---------- Toast ---------- */
.toast{
  position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);opacity:0;pointer-events:none;
  background:var(--ink);color:#fff;padding:12px 20px;border-radius:999px;font-size:14px;z-index:99;
  box-shadow:var(--shadow-lg);transition:.35s cubic-bezier(.2,.7,.2,1);
}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- Responsive ---------- */
@media (max-width:1080px){
  .shell{grid-template-columns:1fr}
  .side{position:static}
  .course-grid{grid-template-columns:repeat(2,1fr)}
  .hero__inner{grid-template-columns:1fr}
  .hero__right{display:none}
}
@media (max-width:760px){
  .wrap{padding:0 16px}
  .nav{display:none}
  .course-grid,.entry-grid,.banner-trio,.mini-stats{grid-template-columns:1fr 1fr}
  .clock-row{grid-template-columns:1fr}
  .detail{grid-template-columns:1fr}
  .search{width:150px}
}
@media (max-width:480px){
  .course-grid,.entry-grid,.banner-trio,.mini-stats{grid-template-columns:1fr}
}

@keyframes fadein{from{opacity:0}to{opacity:1}}
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- Community ---------- */
.composer{
  background:var(--surface);border:1px solid var(--line-2);border-radius:var(--radius);
  padding:18px 20px;box-shadow:var(--shadow-sm);margin-bottom:22px;
}
.composer__row{display:flex;gap:14px;align-items:flex-start}
.composer__row img{width:42px;height:42px;border-radius:50%;flex-shrink:0}
.composer textarea{
  flex:1;border:0;outline:0;resize:none;background:transparent;font-family:inherit;
  font-size:15px;color:var(--ink);min-height:52px;
}
.composer textarea::placeholder{color:var(--ink-3)}
.composer__tools{display:flex;align-items:center;gap:10px;margin-top:10px;padding-top:12px;border-top:1px dashed var(--line)}
.composer__tools .tool{display:inline-flex;gap:6px;align-items:center;font-size:13px;color:var(--ink-2);padding:7px 12px;border-radius:9px;background:var(--surface-2);transition:.2s}
.composer__tools .tool:hover{background:var(--sage-soft);color:var(--green-deep)}
.composer__tools .btn--green{margin-left:auto;padding:9px 20px;font-size:13.5px}

.feed-tabs{display:inline-flex;gap:4px;background:#fff;border:1px solid var(--line);padding:5px;border-radius:999px;margin-bottom:20px}
.feed-tab{padding:8px 18px;border-radius:999px;font-size:14px;font-weight:600;color:var(--ink-2);transition:.2s}
.feed-tab.on{background:var(--ink);color:#fff}

.post{
  background:var(--surface);border:1px solid var(--line-2);border-radius:var(--radius);
  padding:20px 22px;box-shadow:var(--shadow-sm);margin-bottom:16px;transition:transform .25s,box-shadow .25s;
}
.post:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.post__head{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.post__head img{width:40px;height:40px;border-radius:50%;flex-shrink:0}
.post__who b{font-size:14.5px;display:block}
.post__who span{font-size:12px;color:var(--ink-3)}
.post__head .time{margin-left:auto;font-size:12px;color:var(--ink-3)}
.essence{font-size:10.5px;background:linear-gradient(135deg,#f6c46a,#ef9f47);color:#fff;padding:2px 8px;border-radius:999px;font-weight:700;margin-right:6px}
.post__title{font-size:16.5px;font-weight:700;margin:0 0 8px;line-height:1.45}
.post__body{font-size:14px;color:var(--ink-2);line-height:1.75;margin:0 0 12px}
.post__tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.topic{margin-left:auto;font-size:12px;color:var(--ink-3)}
.post__actions{display:flex;gap:20px;align-items:center;padding-top:12px;border-top:1px dashed var(--line)}
.act{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--ink-3);transition:.2s;cursor:pointer}
.act:hover{color:var(--green-deep)}
.act.on{color:var(--red)}
.act b{font-weight:600}
/* 帖子评论 */
.cmt-box{margin-top:12px;padding-top:12px;border-top:1px dashed var(--line)}
.cmt-item{padding:8px 0}
.cmt-item + .cmt-item{border-top:1px solid var(--line-2)}
.cmt-who{display:flex;align-items:center;gap:8px;margin-bottom:2px}
.cmt-who b{font-size:13.5px}
.cmt-item p{margin:0;font-size:13.5px;color:var(--ink-2);line-height:1.7}
.cmt-form{display:flex;gap:8px;margin-top:12px}
.cmt-form input{flex:1;padding:9px 12px;border:1px solid var(--line);border-radius:10px;background:var(--surface-2);color:var(--ink);font-size:13.5px}

.side-heading{font-size:15px;font-weight:800;margin:0 0 16px;display:flex;align-items:center;gap:8px}
.topic-cloud{display:flex;flex-wrap:wrap;gap:9px}
.topic-chip{font-size:13px;color:var(--ink-2);background:var(--surface-2);border:1px solid var(--line-2);padding:7px 13px;border-radius:999px;transition:.2s;cursor:pointer}
.topic-chip:hover{border-color:var(--green);color:var(--ink)}
.topic-chip b{color:var(--ink-3);font-weight:600;margin-left:4px;font-size:12px}
.group-item{display:flex;align-items:center;gap:12px;padding:11px 0}
.group-item .g-ic{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;color:#fff;font-weight:800;flex-shrink:0}
.group-item b{font-size:14px;display:block}
.group-item span{font-size:12px;color:var(--ink-3)}
.group-item .join{margin-left:auto;font-size:12.5px;font-weight:700;color:var(--green-deep);border:1px solid var(--sage);padding:5px 12px;border-radius:999px;transition:.2s;cursor:pointer}
.group-item .join:hover{background:var(--green);color:#fff;border-color:var(--green)}
.notice{padding:18px 20px;background:linear-gradient(150deg,#eef5ec,#fff);border:1px solid var(--line-2);border-radius:var(--radius)}
.notice b{font-size:14.5px}
.notice p{font-size:13px;color:var(--ink-2);line-height:1.7;margin:6px 0 12px}

/* ---------- Theme (light / dark) ---------- */
body{transition:background-color .35s ease,color .35s ease}
.topbar,.card,.clock-box,.greet-card,.live-card,.composer,.notice,
.side .card--cta,.chip,.tabs,.feed-tabs,.course,.post,.leaderboard,.info-card{
  transition:background-color .35s ease,border-color .35s ease,box-shadow .35s ease
}

[data-theme="dark"]{
  --bg:#0f1418;--bg-2:#0c1114;
  --surface:#161c22;--surface-2:#1c242b;
  --ink:#e7ecf0;--ink-2:#b4bcc4;--ink-3:#7c8790;
  --line:#242c33;--line-2:#20282f;
  --green:#5fbb8a;--green-deep:#6fc79a;
  --green-soft:rgba(95,187,138,.16);--sage-soft:rgba(169,203,155,.16);
  --blue-soft:rgba(74,144,217,.2);--orange-soft:rgba(232,160,75,.2);
  --red-soft:rgba(156,75,63,.22);--sage:#8fbf83;
  --shadow-sm:0 1px 2px rgba(0,0,0,.3),0 2px 10px rgba(0,0,0,.25);
  --shadow-md:0 8px 28px rgba(0,0,0,.4);
  --shadow-lg:0 24px 60px rgba(0,0,0,.55);
}

[data-theme="dark"] body{
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(95,187,138,.12), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(74,144,217,.1), transparent 55%),
    var(--bg);
}
[data-theme="dark"] .topbar{background:rgba(15,20,24,.82);border-color:var(--line)}
[data-theme="dark"] .search{background:var(--surface);border-color:var(--line);color:var(--ink-3)}
[data-theme="dark"] .search input{color:var(--ink)}
[data-theme="dark"] .icon-btn{background:var(--surface);border-color:var(--line);color:var(--ink-2)}
[data-theme="dark"] .nav a:hover{background:rgba(255,255,255,.06)}
[data-theme="dark"] .chip{background:var(--surface);border-color:var(--line);color:var(--ink-2)}
[data-theme="dark"] .chip:hover{border-color:var(--green)}
[data-theme="dark"] .chip.on{background:var(--ink);color:var(--bg)}
[data-theme="dark"] .tabs,.feed-tabs{background:var(--surface);border-color:var(--line)}
[data-theme="dark"] .tab.on,.feed-tab.on{background:var(--ink);color:var(--bg)}
[data-theme="dark"] .tab{color:var(--ink-2)}
[data-theme="dark"] .tab .dot{box-shadow:none}

[data-theme="dark"] .hero{
  background:linear-gradient(115deg,#141a1f 0%,#18201f 46%,#16261d 100%);
  border-color:var(--line);
}
[data-theme="dark"] .hero__grid{
  background-image:linear-gradient(rgba(231,236,240,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(231,236,240,.045) 1px,transparent 1px);
}
[data-theme="dark"] .hero__badge{background:rgba(255,255,255,.06);border-color:rgba(95,187,138,.35);color:#8fd6b0}
[data-theme="dark"] .hero__en{color:var(--ink-2)}
[data-theme="dark"] .hero__tag{color:var(--ink-2)}
[data-theme="dark"] .btn--ghost{background:rgba(255,255,255,.06);border-color:var(--line);color:var(--ink)}
[data-theme="dark"] .btn--ghost:hover{border-color:var(--ink-2)}
[data-theme="dark"] .pulse-line{opacity:.35}

[data-theme="dark"] .greet-card{background:linear-gradient(160deg,#151b21,#16211c)}
[data-theme="dark"] .clock-box{background:var(--surface)}
[data-theme="dark"] .live-card{background:linear-gradient(150deg,#16211b,#14201d)}
[data-theme="dark"] .weather{color:var(--ink-2)}
[data-theme="dark"] .live-card .pill{background:#3c5c46;color:#cde7d5}

[data-theme="dark"] .composer__tools .tool{background:var(--surface-2);color:var(--ink-2)}
[data-theme="dark"] .notice,.side .card--cta{background:linear-gradient(150deg,#16211c,var(--surface));border-color:var(--line)}
[data-theme="dark"] .notices,.side .card--cta p{color:var(--ink-2)}
[data-theme="dark"] .dtab{color:var(--ink-2)}
[data-theme="dark"] .dtab.on::after{background:var(--green)}
[data-theme="dark"] .essence{background:linear-gradient(135deg,#f6c46a,#ef9f47)}

[data-theme="dark"] .course__tag{color:inherit}
[data-theme="dark"] .topic{color:var(--ink-3)}
[data-theme="dark"] .topic-chip{background:var(--surface-2);border-color:var(--line);color:var(--ink-2)}

/* theme toggle button icon swap */
#themeToggle .sun{display:none}
[data-theme="dark"] #themeToggle .moon{display:none}
[data-theme="dark"] #themeToggle .sun{display:block}
.theme-float{
  position:fixed;top:22px;right:22px;z-index:60;background:rgba(255,255,255,.7);
  backdrop-filter:blur(8px);box-shadow:var(--shadow-md);
}
[data-theme="dark"] .theme-float{background:rgba(20,26,31,.8)}

/* ---------- Account / session ---------- */
.account-entry{display:flex;align-items:center;gap:12px}
.role-nav{font-size:13px;font-weight:700;color:var(--green-deep);border:1px solid var(--sage);padding:7px 13px;border-radius:999px;transition:.2s;white-space:nowrap}
.role-nav:hover{background:var(--green);color:#fff;border-color:var(--green)}
.user-chip{display:inline-flex;align-items:center;gap:8px;padding:4px 12px 4px 5px;border:1px solid var(--line);border-radius:999px;background:#fff;box-shadow:var(--shadow-sm)}
.user-chip img{width:30px;height:30px;border-radius:50%}
.user-chip b{font-size:13px;font-weight:700}
[data-theme="dark"] .user-chip{background:var(--surface);border-color:var(--line)}
.btn--login{padding:9px 18px;font-size:13.5px}

/* ---------- Console (导生 / 管理员) ---------- */
.con-hero{background:linear-gradient(140deg,#22364a,#2e5348);border-radius:var(--radius);color:#fff;padding:28px 30px;margin-bottom:22px;position:relative;overflow:hidden}
.con-hero::after{content:"";position:absolute;right:-40px;top:-40px;width:220px;height:220px;border-radius:50%;background:rgba(255,255,255,.08)}
.con-hero h1{margin:0 0 8px;font-size:26px;font-weight:800}
.con-hero p{margin:0;opacity:.85;font-size:14px}
.conbar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}
.con-tab{padding:9px 18px;border-radius:999px;border:1px solid var(--line);background:#fff;font-weight:600;font-size:14px;color:var(--ink-2);transition:.2s}
.con-tab:hover{border-color:var(--green)}
.con-tab.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.panel{display:none}
.panel.show{display:block}
.panel-anim{animation:fadein .4s ease}
.console-actions{display:flex;justify-content:space-between;align-items:flex-end;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.console-actions h2{margin:0;font-size:19px;font-weight:800}
.console-actions .sub{color:var(--ink-3);font-size:12.5px;margin-top:4px}
.table-wrap{overflow:auto;border-radius:12px;border:1px solid var(--line-2)}
.table-wrap table{width:100%;border-collapse:collapse;font-size:13.5px;background:var(--surface)}
.table-wrap th,.table-wrap td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line-2)}
.table-wrap th{color:var(--ink-3);font-size:11.5px;font-weight:700;letter-spacing:.04em;background:var(--surface-2)}
.table-wrap tr:last-child td{border-bottom:0}
.table-wrap tr:hover td{background:var(--surface-2)}
.badge{font-size:11.5px;padding:3px 9px;border-radius:999px;font-weight:700;white-space:nowrap}
.badge--mentor{background:var(--sage-soft);color:var(--green-deep)}
.badge--stu{background:var(--blue-soft);color:var(--blue)}
.badge--teacher{background:var(--red-soft);color:var(--red)}
.badge--admin{background:var(--orange-soft);color:var(--orange)}
.form-card{background:var(--surface);border:1px solid var(--line-2);border-radius:var(--radius);padding:22px;margin-bottom:18px;box-shadow:var(--shadow-sm)}
.form-card h3{margin:0 0 16px;font-size:15.5px}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.form-grid .full{grid-column:1 / -1}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-size:13px;font-weight:600;color:var(--ink-2)}
.field input,.field select,.field textarea{border:1px solid var(--line);background:var(--surface-2);border-radius:10px;padding:10px 12px;font-size:14px;font-family:inherit;color:var(--ink);outline:0;transition:.2s}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--green);background:var(--surface);box-shadow:0 0 0 3px rgba(95,187,138,.15)}
.field textarea{resize:vertical;min-height:70px}
.btn--sm{padding:9px 18px;font-size:13px}
.help{font-size:12.5px;color:var(--ink-3);line-height:1.65}
.empty{text-align:center;color:var(--ink-3);padding:34px 0;font-size:13.5px}
.gate-block{display:none;max-width:520px;margin:48px auto;text-align:center;padding:46px 36px;border-radius:var(--radius-lg);background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-md)}
.gate-block .big{width:64px;height:64px;border-radius:18px;margin:0 auto 18px;display:grid;place-items:center;background:var(--orange-soft);color:var(--orange)}
.gate-block h2{margin:0 0 10px;font-size:22px}
.gate-block p{margin:0 0 22px;color:var(--ink-2);font-size:14px;line-height:1.7}

/* ---------- Login ---------- */
.auth{min-height:100vh;display:grid;grid-template-columns:1.1fr .9fr;background:linear-gradient(120deg,#f7f6f3,#e8efe8)}
[data-theme="dark"] .auth{background:linear-gradient(120deg,#0f1418,#122019)}
.auth__brand{display:flex;flex-direction:column;justify-content:center;padding:60px;color:#fff;position:relative;overflow:hidden}
.auth__brand h1{font-size:38px;font-weight:800;margin:0 0 14px;position:relative;z-index:2}
.auth__brand p{max-width:440px;opacity:.92;line-height:1.8;font-size:15px;position:relative;z-index:2}
.auth__brand .glow{filter:blur(80px);opacity:.6}
.auth__card{display:flex;align-items:center;justify-content:center;padding:40px}
.auth__box{width:100%;max-width:400px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:36px;box-shadow:var(--shadow-lg)}
.auth__box h2{font-size:24px;margin:0 0 6px;font-weight:800}
.auth__box .sub{color:var(--ink-3);font-size:13px;margin-bottom:24px}
.auth__box .field{margin-bottom:16px}
.auth__box .btn--green{width:100%;justify-content:center;padding:13px}
.field-err{display:none;color:#c0392b;font-size:12px;margin-top:-2px}
.field-err.show{display:block}
.field.invalid input,.field.invalid select{border-color:#c0392b!important;box-shadow:0 0 0 3px rgba(192,57,43,.12)!important}
.demo-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:22px;padding-top:20px;border-top:1px dashed var(--line)}
.demo-row .demo{flex:1;min-width:80px;text-align:center;font-size:12px;padding:9px 6px;border:1px solid var(--line);background:var(--surface-2);border-radius:10px;color:var(--ink-2);transition:.2s;display:flex;flex-direction:column;gap:3px;align-items:center}
.demo-row .demo b{font-size:14px;color:var(--ink)}
.demo-row .demo:hover{border-color:var(--green);transform:translateY(-2px)}
.login-err{display:none;color:#c0392b;font-size:13px;margin:0 0 12px}
.auth__box .field{position:relative}
.field .ferr{display:none;font-size:12px;color:#e0574a;line-height:1.4;padding-top:1px}
.field.err input,.field.err textarea{border-color:#e0574a;box-shadow:0 0 0 3px rgba(224,87,74,.14)}
.field.invalid input,.field.invalid textarea{border-color:#e0574a;box-shadow:0 0 0 3px rgba(224,87,74,.14)}
.ferr.show{display:block}
.auth__box .hint{color:var(--ink-3);font-size:12px;margin:-6px 0 12px;text-align:left}
.auth__box .hint b{color:var(--green-deep);font-weight:600}

@media (max-width:900px){
  .auth{grid-template-columns:1fr}
  .auth__brand{min-height:220px;padding:34px 24px}
  .auth__card{padding:24px}
  .form-grid{grid-template-columns:1fr}
}

/* ---------- Check-in ---------- */
.checkin-card{padding:22px 26px;margin-bottom:22px}
.ck-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:18px;flex-wrap:wrap}
.ck-title{font-size:18px;font-weight:800}
.ck-sub{color:var(--ink-3);font-size:12.5px;margin-top:5px;line-height:1.6}
.ck-pwd{text-align:center;background:var(--surface-2);border:1px dashed var(--line);border-radius:14px;padding:10px 20px;min-width:150px}
.ck-pwd-label{display:block;font-size:11.5px;color:var(--ink-3);margin-bottom:4px}
.ck-pwd-val{font-size:26px;font-weight:800;letter-spacing:7px;color:var(--green-deep);font-variant-numeric:tabular-nums}
.ck-body{display:flex;flex-direction:column;gap:16px}
.ck-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.ck-stat{background:var(--surface-2);border-radius:12px;padding:13px 16px;text-align:center}
.ck-stat b{font-size:20px;font-weight:800;display:block;color:var(--ink)}
.ck-stat span{font-size:12px;color:var(--ink-3)}
.ck-row{display:flex;gap:10px}
.ck-row input{flex:1;border:1px solid var(--line);background:var(--surface-2);border-radius:10px;padding:11px 14px;font-size:16px;letter-spacing:3px;font-variant-numeric:tabular-nums;color:var(--ink);outline:0}
.ck-row input:focus{border-color:var(--green);box-shadow:0 0 0 3px rgba(95,187,138,.15)}
.ck-row .btn{padding:11px 20px;border-radius:10px}
[data-theme="dark"] .ck-stat{background:var(--surface-2)}
@media (max-width:560px){.ck-stats{grid-template-columns:1fr}.ck-row{flex-direction:column}}

/* ---------- Mobile navigation & responsive polish ---------- */
.nav-toggle{display:none}
@media (max-width:760px){
  .search{width:130px}
  .topbar{position:sticky}
  .nav-toggle{display:grid}
  .nav{
    position:absolute;top:100%;left:0;right:0;display:none;flex-direction:column;
    background:var(--surface);box-shadow:var(--shadow-md);padding:8px 16px 14px;
    border-bottom:1px solid var(--line);
  }
  .topbar.menu-open .nav{display:flex}
  .nav a{display:block;padding:12px 10px;font-size:15px;border-radius:10px}
  .nav a.on{background:var(--surface-2)}
  .nav a.on::after{display:none}
  .account-entry{gap:8px}
  .account-entry .role-nav{font-size:12px;padding:6px 10px}
  .tabs,.feed-tabs{flex-wrap:wrap;justify-content:center}
  .path-title .tabs{justify-content:center}
}
@media (max-width:600px){
  .search{display:none}
  .topbar__right{gap:8px}
  .brand__name{font-size:17px}
  .brand__emblem{width:32px;height:32px}
  .user-chip b{max-width:72px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .hero h1{font-size:30px}
  .hero__badge{font-size:11px}
  .hero__stats{gap:20px}
  .sec-head h2{font-size:20px}
}
@media (max-width:900px){
  .console-actions{flex-direction:column;align-items:flex-start}
  .form-grid{grid-template-columns:1fr}
  .con-tab{flex:1;text-align:center;padding:9px 10px}
}