:root{--gold:#c89520;--deep-gold:#8b6510;--lapis:#1a3a6b;--cinnabar:#a02010;--rice:#f5f0e4;--ink:#2e2a22;--line:#e8dfc0;--paper:#fffaf0;--shadow:0 18px 50px rgba(46,42,34,0.12)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--rice);color:var(--ink);font-family:Inter,Noto Sans SC,Microsoft YaHei,Arial,sans-serif;line-height:1.75}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto}button,input,textarea{font:inherit}.site-shell{min-height:100vh;background:linear-gradient(180deg,rgba(26,58,107,.08),transparent 520px),var(--rice)}.container{width:min(1120px,calc(100% - 32px));margin:0 auto}.header{position:-webkit-sticky;position:sticky;top:0;z-index:40;border-bottom:1px solid rgba(200,149,32,.22);background:rgba(245,240,228,.93);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.header-inner{justify-content:space-between;gap:24px;min-height:76px}.brand,.header-inner{display:flex;align-items:center}.brand{gap:12px;font-family:Georgia,"Noto Serif SC",serif;font-size:21px;font-weight:700;color:var(--deep-gold);white-space:nowrap}.brand-mark{width:42px;height:42px;border-radius:50%;border:1px solid var(--line);object-fit:cover}.nav{display:flex;align-items:center;gap:15px;font-size:14px;color:rgba(46,42,34,.82)}.nav a.active,.nav a:hover{color:var(--deep-gold)}.language-switcher{display:inline-flex;gap:4px;padding:4px;border:1px solid var(--line);border-radius:999px;background:rgba(255,250,240,.72)}.language-switcher a{padding:4px 9px;border-radius:999px;font-size:13px}.language-switcher a.active{background:var(--gold);color:white}.mobile-menu{display:none}.hero{position:relative;overflow:hidden;padding:92px 0 74px;background:var(--lapis);color:#fff7df}.hero:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(26,58,107,.98),rgba(26,58,107,.66) 55%,rgba(26,58,107,.2)),url(/images/teachers/yundeng-gongbu.jpg) 100% /cover no-repeat}.hero-content{position:relative;z-index:1;max-width:650px}.eyebrow{color:var(--gold);font-size:14px;font-weight:700;letter-spacing:0}h1,h2,h3{font-family:Georgia,"Noto Serif SC",Songti SC,serif;line-height:1.2;letter-spacing:0}h1{margin:16px 0;font-size:clamp(42px,8vw,82px)}h2{margin:0 0 18px;font-size:clamp(30px,4vw,48px);color:var(--deep-gold)}h3{margin:0 0 10px;font-size:24px}.lead{max-width:740px;color:rgba(46,42,34,.78);font-size:18px}.hero .lead{color:rgba(255,247,223,.9);font-size:20px}.section{padding:82px 0}.section.compact{padding:52px 0}.page-head{padding:72px 0 36px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:12px 22px;border:1px solid transparent;border-radius:999px;background:var(--gold);color:white;font-weight:700;cursor:pointer;transition:transform .2s ease,background .2s ease}.button:hover{background:var(--deep-gold);transform:translateY(-1px)}.button.secondary{border-color:var(--line);background:rgba(255,250,240,.84);color:var(--deep-gold)}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:22px;gap:22px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.card{border:1px solid var(--line);border-radius:8px;background:rgba(255,250,240,.88);box-shadow:0 10px 35px rgba(46,42,34,.06);padding:24px}.click-card{transition:transform .2s ease,box-shadow .2s ease}.click-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.card p{margin:0 0 16px;color:rgba(46,42,34,.75)}.accordion{margin-top:16px;border-top:1px solid var(--line);padding-top:14px}.accordion summary{color:var(--deep-gold);cursor:pointer;font-weight:700}.prose{max-width:820px;color:rgba(46,42,34,.82);font-size:17px}.prose p{margin:0 0 18px}.teacher{display:grid;grid-template-columns:360px 1fr;grid-gap:34px;gap:34px;align-items:start}.book-cover,.feedback-img,.teacher img{border-radius:8px;border:1px solid var(--line);box-shadow:var(--shadow)}.teacher-title{color:var(--gold);font-weight:700}.event-fields{display:grid;grid-gap:10px;gap:10px;margin:18px 0}.event-fields div{display:grid;grid-template-columns:96px 1fr;grid-gap:12px;gap:12px}.event-fields strong{color:var(--deep-gold)}.form{display:grid;grid-gap:12px;gap:12px;margin-top:18px}.form input,.form textarea{width:100%;min-height:46px;border:1px solid var(--line);border-radius:8px;background:#fffdf7;color:var(--ink);padding:12px 14px}.form textarea{min-height:110px;resize:vertical}.date-row{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:10px;gap:10px}.notice{border-left:4px solid var(--gold);background:rgba(200,149,32,.1);padding:14px 16px;color:rgba(46,42,34,.82)}.footer{border-top:1px solid var(--line);padding:42px 0;background:rgba(26,58,107,.96);color:#fff7df}.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;grid-gap:28px;gap:28px}.footer a{color:#f4d188}.footer input{width:100%;min-height:44px;border:1px solid rgba(232,223,192,.55);border-radius:8px;background:rgba(255,255,255,.1);color:white;padding:10px 12px}.footer input::placeholder{color:rgba(255,247,223,.76)}.feedback-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:18px;gap:18px}@media (max-width:1080px){.nav{display:none}.mobile-menu{display:block}.mobile-menu summary{display:grid;width:38px;height:38px;place-items:center;list-style:none;cursor:pointer;color:var(--deep-gold);font-weight:700}.mobile-menu summary::-webkit-details-marker{display:none}.menu-icon{display:grid;width:20px;grid-gap:4px;gap:4px}.menu-icon span{display:block;height:2px;border-radius:2px;background:currentColor}.mobile-panel{position:absolute;left:16px;right:16px;top:72px;display:grid;grid-gap:12px;gap:12px;border:1px solid var(--line);border-radius:8px;background:var(--paper);box-shadow:var(--shadow);padding:18px}.mobile-menu:not([open]) .mobile-panel{display:none}}@media (max-width:860px){.feedback-grid,.footer-grid,.grid,.grid.two,.teacher{grid-template-columns:1fr}.section{padding:56px 0}.hero{padding:72px 0 58px}}@media (max-width:600px){.header-inner{gap:12px}.header-inner>.language-switcher{display:none}.brand{min-width:0;font-size:18px}.brand span{overflow:hidden;text-overflow:ellipsis}}