/* 大牛聊教育 · 对外页面共用样式（官网首页、学生入口、职业锚入口、说明页）。管理后台用 ui.css。 */
:root{--bg:#f7f9fc;--card:#fff;--text:#14213d;--muted:#5b6b86;--line:#e3e8f1;--brand:#2f6fed;--brand-d:#1f55c4;--brand-l:#eaf1ff;--sel:#eaf1ff;--accent:#ff8a3d;--ok:#12805c;--ink:#0b1a3a;--sh:0 10px 30px rgba(20,33,61,.08);--r:16px}
@media (prefers-color-scheme:dark){:root{--bg:#0d1424;--card:#151d31;--text:#e8ecf5;--muted:#9fb0cc;--line:#25304a;--brand:#6c9bff;--brand-d:#8db0ff;--brand-l:#1b2a4d;--sel:#1b2a4d;--ink:#050b19;--sh:0 10px 30px rgba(0,0,0,.35)}}
body{background:var(--bg);color:var(--text)}
.sw{max-width:1120px;margin:0 auto;padding:0 20px}
/* 页头 */
.site-header{background:rgba(255,255,255,.88);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:40}
@media (prefers-color-scheme:dark){.site-header{background:rgba(13,20,36,.88)}}
.site-header .sw{display:flex;align-items:center;gap:26px;height:64px}
.site-brand{display:flex;gap:10px;align-items:center;font-weight:800;font-size:18px;color:var(--text);text-decoration:none;line-height:1.2}
.site-brand img{width:36px;height:36px;flex:none;display:block}
.site-brand small{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.12em;margin-top:2px}
.site-nav{display:flex;gap:22px;font-size:15px}.site-nav a{color:var(--muted);text-decoration:none}.site-nav a:hover{color:var(--text)}
.site-sp{flex:1}
/* 按钮 */
.sbtn{display:inline-flex;gap:8px;align-items:center;justify-content:center;white-space:nowrap;flex:none;border:1px solid var(--brand);background:var(--brand);color:#fff;border-radius:12px;padding:10px 20px;font:inherit;font-weight:600;cursor:pointer;text-decoration:none;transition:background .15s}
.sbtn:hover{background:var(--brand-d);border-color:var(--brand-d)}
.sbtn.ghost{background:transparent;color:var(--brand)}.sbtn.ghost:hover{background:var(--brand-l)}
.sbtn.lg{padding:13px 26px;font-size:1.05rem;border-radius:14px}.sbtn.block{width:100%}
.sbtn.light{background:#fff;color:#1f55c4;border-color:#fff}.sbtn.light:hover{background:#eaf1ff}
.sbtn:focus-visible,.site-nav a:focus-visible,.site-brand:focus-visible{outline:3px solid var(--brand);outline-offset:2px}
.eyebrow{display:inline-flex;gap:8px;align-items:center;background:var(--brand-l);color:var(--brand);border-radius:99px;padding:3px 14px;font-size:13.5px;font-weight:600}
/* 页脚 */
.site-footer{background:var(--ink);color:#9fb0cc;padding:44px 0 26px;margin-top:64px;font-size:14px}
.site-footer .sw{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:28px}
.site-footer .site-brand{color:#fff}.site-footer .site-brand small{color:#9fb0cc}
.site-footer h6{margin:0 0 10px;color:#fff;font-size:14px}.site-footer a{display:block;color:#9fb0cc;padding:3px 0;text-decoration:none}.site-footer a:hover{color:#fff}
.site-footer p{margin:12px 0 0;max-width:22em}
.site-footer .copy{grid-column:1/-1;border-top:1px solid #1d2c4d;padding-top:16px;margin-top:6px;font-size:13px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
@media (max-width:900px){.site-nav{display:none}.site-footer .sw{grid-template-columns:1fr 1fr}}
@media (max-width:600px){.site-header .site-brand small{display:none}.site-header .sw{gap:12px}.site-header .sbtn{padding:8px 14px}}
/* 学生扫码入口（提问墙 / 投票共用） */
.entry-hero{background:linear-gradient(160deg,#1b4fc0,#2f6fed 60%,#5b8cff);color:#fff;padding:22px 0 64px}
.entry-hero .site-brand{color:#fff;font-size:16px}.entry-hero .site-brand small{color:#dbe8ff}
.entry-hero h1{font-size:1.6rem;line-height:1.3;margin:22px 0 6px;color:#fff}.entry-hero p{margin:0;opacity:.92}
.entry-card{background:var(--card);border:1px solid var(--line);border-radius:20px;margin:-40px 0 16px;padding:22px;box-shadow:var(--sh)}
.entry-card h2{margin:0 0 4px;font-size:1.1rem}
.entry-card .codein{width:100%;text-align:center;text-transform:uppercase;font-size:2rem;font-weight:800;letter-spacing:.35em;padding:14px 8px 14px 18px;border:2px solid var(--line);border-radius:16px;background:var(--bg);color:var(--brand)}
.entry-card .codein::placeholder{letter-spacing:0;font-size:1rem;font-weight:500;color:var(--muted);text-transform:none}
.entry-card .codein:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px var(--brand-l)}
.entry-note{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--muted);margin:14px 4px 18px}
.entry-note svg{width:18px;height:18px;flex:none;stroke:var(--ok);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;margin-top:2px}
.entry-foot{text-align:center;color:var(--muted);font-size:12.5px;padding:8px 0 28px}.entry-foot a{color:var(--muted)}
/* 职业锚入口 */
#app.landing-mode{max-width:1120px;padding:0 20px 20px}
.landing{display:grid;grid-template-columns:minmax(0,1fr) 440px;gap:44px;padding:40px 0 10px;align-items:start}
.land-l h1{font-size:clamp(1.8rem,3.4vw,2.6rem);line-height:1.2;margin:14px 0}.land-l h1 em{font-style:normal;color:var(--brand)}
.land-l .lead{color:var(--muted);font-size:1.1rem;margin:0 0 22px}
.facts{display:flex;gap:28px;margin:0 0 24px;flex-wrap:wrap}.facts b{display:block;font-size:1.8rem;color:var(--brand);line-height:1.2}.facts span{color:var(--muted);font-size:.9rem}
.get{display:grid;gap:12px;margin:0 0 26px}.get>div{display:flex;gap:12px;align-items:flex-start}.get>div>div{display:block}.get b{display:block}.get svg{width:22px;height:22px;stroke:var(--ok);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;margin-top:3px;flex:none}.get span{color:var(--muted);display:block;font-size:.93rem}
.land-r .card{margin:0;border-radius:20px;padding:26px;box-shadow:var(--sh);position:sticky;top:84px}
.land-r h1{font-size:1.3rem;margin:0 0 4px}
.land-l .side{position:static;border:1px solid var(--line);border-radius:var(--r);box-shadow:none}
@media (max-width:980px){.landing{grid-template-columns:1fr;gap:20px;padding-top:24px}.land-r{order:-1}.land-r .card{position:static}}

.land-r form .row{margin-top:18px}.land-r form .row button{width:100%;padding:13px 20px;font-size:1.05rem;border-radius:12px}