/* uzs2 学生端 —— 在 base.css(沿用 uzs/new 配色) 之上的页面样式; 手机优先, 平板/电脑自适应 */
main{padding-bottom:88px}
.tabbar{position:fixed;left:0;right:0;bottom:0;z-index:20;display:flex;background:#fff;border-top:1px solid var(--line);box-shadow:0 -4px 16px rgba(25,23,19,.08);padding-bottom:env(safe-area-inset-bottom)}
.tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;gap:1px;padding:7px 0 6px;font-size:11.5px;font-weight:800;color:var(--muted);text-decoration:none}
.tabbar a span{font-size:20px;line-height:1.1}
.tabbar a.on{color:var(--cobalt)}
@media (min-width:760px){.tabbar{display:none}main{padding-bottom:40px}}
@media (max-width:759px){.topnav{display:none}}

/* 首页 */
.hero-card{background:linear-gradient(135deg,#173a5e,#1E6FB0);color:#fff;border-radius:18px;padding:16px 18px;box-shadow:var(--sh);display:flex;gap:14px;align-items:center;margin-bottom:14px}
.hero-card .hc-ic{font-size:36px}.hero-card b{display:block;font-size:17px}.hero-card small{opacity:.9;font-size:12.5px}
.hero-card .btn{margin-left:auto;background:var(--gold);color:#3a2300;flex-shrink:0}
.paths{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media (min-width:640px){.paths{grid-template-columns:repeat(4,1fr)}}
.pcard{display:block;text-decoration:none;color:#fff;border-radius:16px;padding:14px 13px 12px;min-height:118px;position:relative;box-shadow:var(--sh)}
.pcard .ic{font-size:26px}.pcard .nm{font-weight:900;font-size:17px;margin-top:4px}.pcard .uz{font-size:11.5px;opacity:.85}
.pcard .pr{margin-top:8px;height:6px;border-radius:99px;background:rgba(255,255,255,.25);overflow:hidden}.pcard .pr i{display:block;height:100%;background:#fff;border-radius:99px}
.pcard .st{font-size:11.5px;margin-top:4px;opacity:.95}
.c-basics{background:linear-gradient(140deg,#1d5f97,#143C5B)}.c-starter{background:linear-gradient(140deg,#1f7a6d,#145249)}.c-scene{background:linear-gradient(140deg,#b7412f,#7f2a20)}.c-topic{background:linear-gradient(140deg,#6b43a8,#43296b)}
.daily{margin-top:16px;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:12px 14px;display:flex;gap:12px;align-items:center}
.daily .dn{font-size:26px}.daily b{display:block}.daily small{color:var(--muted)}
.daily .btn{margin-left:auto;flex-shrink:0}

/* 课表 */
.gitem .prog{width:10px;height:10px;border-radius:50%;background:var(--paper-2);flex-shrink:0;border:1px solid var(--line)}
.gitem .prog.done{background:#2a9d5c;border-color:#2a9d5c}.gitem .prog.part{background:var(--gold);border-color:var(--gold)}
.gitem .no{background:var(--cobalt)}.cat-starter .gitem .no{background:#1f7a6d}.cat-scene .gitem .no{background:#b7412f}.cat-topic .gitem .no{background:#6b43a8}
.lvrow{display:flex;gap:6px;margin-top:6px}.lvrow a{flex:1;text-align:center;text-decoration:none;font-weight:800;font-size:12.5px;padding:7px 4px;border-radius:10px;background:#e6f2f5;color:#154C5C;border:1px solid #bfdde5}
.lvrow a.done{background:#e9f7ef;border-color:#9fd8b6;color:#1d7a44}

/* 课页 */
.steps{display:flex;gap:4px;margin:12px 0 10px;overflow-x:auto;padding-bottom:2px}
.step{flex:1;min-width:64px;border:0;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:8px 4px;display:flex;flex-direction:column;align-items:center;gap:1px;cursor:pointer;font-family:var(--cjk);color:var(--muted);font-weight:800;font-size:12.5px}
.step span{font-size:18px}.step.on{background:var(--cobalt);border-color:var(--cobalt);color:#fff}.step.done{border-color:#2a9d5c}.step.done small{color:#2a9d5c}
.step small{font-size:10px;font-weight:600}
.pdfbox{background:#0f1b26;border-radius:14px;overflow:hidden;box-shadow:var(--sh)}
.pdfbox iframe{width:100%;aspect-ratio:16/9.6;border:0;display:block;min-height:260px}
.pdfbox .pb-tools{display:flex;gap:8px;justify-content:space-between;align-items:center;padding:8px 12px;background:#17232f;color:#cfe0e8;font-size:12.5px}
.pdfbox .pb-tools a{color:#fff;font-weight:800;text-decoration:none;background:rgba(255,255,255,.14);border-radius:999px;padding:4px 12px}
.nextbar{display:flex;gap:10px;margin:14px 0 4px}
.nextbar .btn{flex:1;text-align:center}
.okmark{display:inline-block;background:#e9f7ef;color:#1d7a44;border-radius:999px;padding:3px 10px;font-size:12px;font-weight:800;margin-left:6px}

/* 记单词 */
.deckgrid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:14px}
@media (min-width:640px){.deckgrid{grid-template-columns:repeat(4,1fr)}}
.deck{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:12px;cursor:pointer;text-align:left;font-family:var(--cjk)}
.deck b{display:block;font-size:15px}.deck small{color:var(--muted)}.deck .n{font-size:24px;font-weight:900;color:var(--cobalt)}
.deck.hot{border-color:var(--red)}.deck.hot .n{color:var(--red)}
.modes{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0 14px}
.flash{max-width:480px;margin:0 auto}
.fcard{background:#fff;border:2px solid var(--cobalt);border-radius:20px;min-height:200px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;padding:22px;text-align:center;cursor:pointer;box-shadow:var(--sh)}
.fcard .w{font-size:30px;font-weight:900;color:var(--cobalt)}.fcard .p{color:var(--muted)}.fcard .c{font-size:20px;color:var(--ink)}
.fcard .e{font-size:13px;color:var(--ink-soft)}
.grade{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:12px}
.grade button{border:0;border-radius:12px;padding:12px 4px;font-weight:900;font-family:var(--cjk);cursor:pointer;color:#fff;font-size:14px}
.g0{background:#c0392b}.g1{background:#e67e22}.g2{background:#2a9d5c}.g3{background:#1E6FB0}
.grade small{display:block;font-weight:600;font-size:11px;opacity:.9}

/* 我的 */
.stat{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:14px}
.stat div{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:12px;text-align:center}
.stat b{display:block;font-size:24px;color:var(--cobalt)}.stat small{color:var(--muted)}
.setrow{display:flex;align-items:center;justify-content:space-between;padding:12px 4px;border-bottom:1px dashed var(--line)}
.setrow:last-child{border-bottom:0}
.seg{display:flex;gap:4px}.seg button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:5px 12px;font-weight:800;cursor:pointer;font-family:var(--cjk)}.seg button.on{background:var(--cobalt);color:#fff;border-color:var(--cobalt)}
.reslist{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media (min-width:640px){.reslist{grid-template-columns:repeat(3,1fr)}}
.resc{display:block;text-decoration:none;color:var(--ink);background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px}
.resc .ic{font-size:26px}.resc b{display:block;margin-top:4px}.resc small{color:var(--muted)}