*{margin:0;padding:0;box-sizing:border-box}
:root{
--bg:#0e0e12;--text:#d8d0c4;--text2:#a09888;--text3:#706558;
--accent:#c8a84e;--accent2:#dfc060;--accent-soft:rgba(200,168,78,0.08);
--border:rgba(200,168,78,0.1);--border2:rgba(200,168,78,0.18);
--card:rgba(16,16,20,0.88);--shadow:rgba(0,0,0,0.5);
--font-han:"Songti SC","Noto Serif SC","SimSun","STSong","KaiTi","PMingLiU",serif;
--font-vi:"Palatino Linotype","Book Antiqua",Palatino,Georgia,"Times New Roman",serif;
--fs-han:1.35rem;--fs-hv:1rem;--fs-vi:1rem;
}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:var(--font-vi);line-height:1.8;overflow-x:hidden}
::selection{background:rgba(200,168,78,0.25)}
a{color:var(--accent);text-decoration:none;transition:color .2s}a:hover{color:var(--accent2)}
::-webkit-scrollbar{width:5px}::-webkit-scrollbar-thumb{background:rgba(200,168,78,0.2);border-radius:3px}

/* === BG === */
#vanta-bg{position:fixed;inset:0;z-index:0}
.css-fallback-bg{background:linear-gradient(180deg,#04040a 0%,#08081a 12%,#0e1028 25%,#141838 40%,#181e3a 52%,#161a35 63%,#10142a 76%,#0a0e1e 88%,#060812 100%)}
.mt-wrap{position:fixed;bottom:0;left:0;right:0;height:42vh;pointer-events:none;z-index:1}
.mt{position:absolute;bottom:0;left:-5%;width:110%}
.mt.f{height:42vh;opacity:0.5}.mt.f path{fill:#08081a}
.mt.m{height:32vh;opacity:0.6}.mt.m path{fill:#0c0e22}
.mt.n{height:22vh;opacity:0.7}.mt.n path{fill:#10142a}
.mt-glow{position:absolute;bottom:10%;left:50%;transform:translateX(-50%);width:60%;height:10%;background:radial-gradient(ellipse,rgba(200,168,78,0.06) 0%,transparent 70%);filter:blur(15px)}
.gfog{position:fixed;bottom:0;left:-10%;width:120%;pointer-events:none;z-index:2}
.gfog1{height:28vh;background:linear-gradient(180deg,transparent 0%,rgba(140,135,125,0.03) 30%,rgba(130,125,118,0.08) 55%,rgba(120,118,112,0.16) 75%,rgba(110,108,102,0.12) 100%);animation:gfd 45s ease-in-out infinite}
.gfog2{height:18vh;background:linear-gradient(180deg,transparent 0%,rgba(200,168,78,0.02) 40%,rgba(180,150,70,0.05) 70%,rgba(160,140,60,0.07) 100%);animation:gfd 60s ease-in-out infinite reverse}
@keyframes gfd{0%{transform:translateX(0) scaleY(1)}50%{transform:translateX(2%) scaleY(1.08)}100%{transform:translateX(0) scaleY(1)}}
#particles{position:fixed;inset:0;pointer-events:none;z-index:3}
.particle{position:absolute;border-radius:50%;background:rgba(200,168,78,0.45);pointer-events:none;animation:pf linear infinite}
@keyframes pf{0%{transform:translateY(0);opacity:0}10%{opacity:0.5}90%{opacity:0.5}100%{transform:translateY(-120px);opacity:0}}

/* === LOADING === */
#loading{position:fixed;inset:0;z-index:999;display:flex;flex-direction:column;align-items:center;justify-content:center;background:var(--bg);transition:opacity .6s}
#loading.hide{opacity:0;pointer-events:none}
.ld-sym{font-size:4rem;color:var(--accent);animation:ldp 2s ease-in-out infinite}
.ld-txt{margin-top:1rem;color:var(--text3);font-size:0.9rem;letter-spacing:0.1em}
@keyframes ldp{0%,100%{transform:scale(1);opacity:0.5}50%{transform:scale(1.15);opacity:1}}
.progress-bar{position:fixed;top:0;left:0;height:2px;background:linear-gradient(90deg,var(--accent),var(--accent2));z-index:300;box-shadow:0 0 8px rgba(200,168,78,0.4);transition:width .1s}

/* === HEADER - COMPACT === */
.header{
position:sticky;top:0;z-index:100;
background:rgba(14,14,18,0.85);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
border-bottom:1px solid var(--border);padding:0.6rem 1rem 0.5rem;text-align:center;
}
.header-top{display:flex;align-items:center;justify-content:center;gap:0.8rem;margin-bottom:0.4rem}
.header h1{
font-family:var(--font-han);font-size:1.8rem;font-weight:400;letter-spacing:0.15em;
background:linear-gradient(180deg,#f0e6c8,#c8a84e);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.header .sub{font-size:0.7rem;opacity:0.3;letter-spacing:0.08em;color:var(--text2)}
.ssel{display:flex;gap:0.3rem;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;padding:0.3rem 0;justify-content:center;flex-wrap:nowrap}
.ssel::-webkit-scrollbar{display:none}
.sb{background:transparent;border:1px solid var(--border);color:var(--text3);padding:0.2rem 0.55rem;border-radius:16px;font-size:0.68rem;cursor:pointer;transition:all .25s;font-family:var(--font-vi);white-space:nowrap;flex-shrink:0}
.sb:hover{border-color:var(--accent);color:var(--accent)}
.sb.active{background:rgba(200,168,78,0.1);border-color:var(--accent);color:var(--accent);font-weight:600}
.sb .h{font-family:var(--font-han);margin-right:0.1rem}
.header-row{display:flex;align-items:center;gap:0.5rem;max-width:600px;margin:0.35rem auto 0}
.sw{flex:1;position:relative}
.sw input{width:100%;padding:0.45rem 0.8rem 0.45rem 2rem;border:1px solid var(--border);border-radius:6px;background:rgba(255,255,255,0.03);color:var(--text);font-size:0.82rem;font-family:var(--font-vi);outline:none;transition:all .3s}
.sw input::placeholder{color:rgba(200,190,170,0.25)}
.sw input:focus{border-color:var(--accent);background:rgba(255,255,255,0.05);box-shadow:0 0 0 3px rgba(200,168,78,0.06)}
.sw .si{position:absolute;left:0.6rem;top:50%;transform:translateY(-50%);opacity:0.25;color:var(--accent)}
.hc{display:flex;gap:0.25rem;flex-shrink:0}
.cb{background:transparent;border:1px solid var(--border);color:var(--text3);padding:0.2rem 0.4rem;border-radius:4px;font-size:0.62rem;cursor:pointer;transition:all .2s;font-family:var(--font-vi)}
.cb:hover{border-color:var(--accent);color:var(--accent)}.cb.active{background:rgba(200,168,78,0.1);border-color:var(--accent);color:var(--accent)}

/* === LAYOUT === */
.layout{display:flex;max-width:1400px;margin:0 auto;position:relative;z-index:10}
.sidebar{width:210px;flex-shrink:0;background:rgba(14,14,18,0.85);backdrop-filter:blur(10px);border-right:1px solid var(--border);position:sticky;top:100px;height:calc(100vh - 100px);overflow-y:auto;padding:0.5rem 0;scrollbar-width:thin;z-index:50}
.sidebar .pl{font-size:0.58rem;font-weight:600;color:var(--accent);letter-spacing:0.2em;padding:0.7rem 1rem 0.2rem;text-transform:uppercase;display:flex;align-items:center;gap:0.4rem}
.sidebar .pl::after{content:'';flex:1;height:1px;background:var(--border)}
.sidebar a{display:flex;align-items:center;gap:0.4rem;padding:0.25rem 0.9rem;font-size:0.78rem;color:var(--text3);transition:all .2s;border-left:2px solid transparent}
.sidebar a:hover,.sidebar a.active{color:var(--accent);border-left-color:var(--accent);background:var(--accent-soft)}
.sidebar a.active{font-weight:600}
.sidebar a .cn{font-family:var(--font-han);font-size:0.82rem}
.sidebar a .nn{font-size:0.65rem;opacity:0.35;margin-left:auto}
.main{flex:1;min-width:0;padding:1.5rem 2rem 4rem;position:relative;z-index:10}

/* === CHAPTER === */
.chapter{
background:var(--card);border:1px solid var(--border);border-radius:12px;margin-bottom:1.8rem;overflow:hidden;
box-shadow:0 4px 24px var(--shadow);transition:all .35s;position:relative;backdrop-filter:blur(8px);
content-visibility:auto;contain-intrinsic-size:auto 350px;
animation:fadeUp 0.3s ease-out both;
}
.chapter:hover{box-shadow:0 8px 36px var(--shadow);border-color:var(--border2)}
.chapter::before{content:'';position:absolute;top:0;left:1.5rem;right:1.5rem;height:1px;background:linear-gradient(90deg,transparent,var(--accent),transparent);opacity:0.25}
.chd{display:flex;align-items:center;gap:1rem;padding:1rem 1.3rem;border-bottom:1px solid var(--border)}
.cnw{width:46px;height:46px;display:flex;align-items:center;justify-content:center;flex-shrink:0;position:relative}
.cnw::before{content:'';position:absolute;inset:0;border:1px solid rgba(200,168,78,0.15);border-radius:50%}
.chn{font-family:var(--font-han);font-size:1.2rem;color:var(--accent);line-height:1;text-align:center}
.chn small{display:block;font-size:0.5rem;color:var(--text3);font-family:var(--font-vi);margin-top:2px}
.cht{flex:1}.ctl{font-size:0.6rem;color:var(--text3);letter-spacing:0.06em;margin-bottom:1px}.cth{font-family:var(--font-han);font-size:1rem;color:var(--text);letter-spacing:0.06em}
.ctg{background:none;border:none;cursor:pointer;color:var(--text3);font-size:0.65rem;padding:0.3rem;transition:all .3s;opacity:0.4}.ctg:hover{opacity:1;color:var(--accent)}
.chapter.collapsed .ctg{transform:rotate(-90deg)}.chapter.collapsed .cbd,.chapter.collapsed .cdv{display:none}
.cdv{text-align:center;padding:0.2rem 0;position:relative}.cdv::before{content:'';position:absolute;left:1.5rem;right:1.5rem;top:50%;height:1px;background:var(--border)}.cdv span{background:var(--card);padding:0 0.6rem;position:relative;color:var(--accent);font-size:0.45rem;letter-spacing:0.3em;opacity:0.3}
.cbd{display:grid;grid-template-columns:1fr 1fr 1fr}.chc{padding:1.2rem 1.4rem 1.4rem}.chc:not(:last-child){border-right:1px solid var(--border)}
.ccl{font-size:0.55rem;font-weight:600;letter-spacing:0.12em;text-transform:uppercase;color:var(--accent);margin-bottom:0.6rem;opacity:0.6}
.col-h .ct{font-family:var(--font-han);font-size:var(--fs-han);line-height:2.2;letter-spacing:0.02em}
.col-hv .ct{font-family:var(--font-vi);font-size:var(--fs-hv);line-height:2;color:var(--text2);font-style:italic}
.col-v .ct{font-family:var(--font-vi);font-size:var(--fs-vi);line-height:1.9}
.cwm{position:absolute;right:1rem;top:50%;transform:translateY(-50%);font-family:var(--font-han);font-size:6rem;color:var(--accent);opacity:0.015;pointer-events:none;line-height:1}
body.fs-s{--fs-han:1.15rem;--fs-hv:0.88rem;--fs-vi:0.88rem}
body.fs-l{--fs-han:1.6rem;--fs-hv:1.12rem;--fs-vi:1.12rem}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

/* === LIGHT === */
body.light{--bg:#F5F0E8;--text:#2C2416;--text2:#6B5B45;--text3:#8C7A60;--accent:#8B6914;--accent2:#a07a18;--accent-soft:rgba(139,105,20,0.06);--border:rgba(139,105,20,0.12);--border2:rgba(139,105,20,0.22);--card:rgba(255,252,245,0.92);--shadow:rgba(90,74,50,0.08)}
body.light .mt.f path{fill:#c0bab0}body.light .mt.m path{fill:#b0aaa0}body.light .mt.n path{fill:#a09a90}
body.light .particle{background:rgba(139,105,20,0.25)}
body.light .header{background:rgba(245,240,232,0.88)}
body.light .header h1{background:linear-gradient(180deg,#5a4a20,#8B6914);-webkit-background-clip:text;background-clip:text}
body.light .sidebar{background:rgba(237,231,218,0.88)}
body.light .stats,.light .footer{background:rgba(237,231,218,0.7)}
body.light .gfog1{background:linear-gradient(180deg,transparent 0%,rgba(255,255,255,0.15) 40%,rgba(255,255,255,0.3) 70%,rgba(245,240,232,0.25) 100%)}
body.light .bottom-nav{background:rgba(245,240,232,0.94)}

/* === MISC === */
.coming-soon{text-align:center;padding:5rem 2rem;color:var(--text3)}.coming-soon .icon{font-size:3.5rem;margin-bottom:0.8rem;opacity:0.15}.coming-soon h2{font-family:var(--font-han);font-size:1.6rem;color:var(--accent);margin-bottom:0.4rem;font-weight:400}.coming-soon p{font-size:0.9rem;opacity:0.5;max-width:380px;margin:0 auto}
.no-results{text-align:center;padding:3rem;color:var(--text3)}
.scroll-top{position:fixed;bottom:1.2rem;left:1.2rem;z-index:150;width:38px;height:38px;border-radius:50%;background:rgba(14,14,18,0.7);border:1px solid var(--border);color:var(--accent);font-size:0.85rem;cursor:pointer;backdrop-filter:blur(6px);opacity:0;pointer-events:none;transition:all .3s}.scroll-top.show{opacity:1;pointer-events:auto}.scroll-top:hover{background:var(--accent);color:var(--bg);border-color:var(--accent)}
.stats{text-align:center;padding:0.25rem;font-size:0.65rem;color:var(--text3);position:relative;z-index:10;background:rgba(14,14,18,0.3)}
.footer{text-align:center;padding:2.5rem 2rem;color:var(--text3);font-size:0.8rem;border-top:1px solid var(--border);position:relative;z-index:10;background:rgba(14,14,18,0.7)}
.footer .dc{font-family:var(--font-han);font-size:3rem;font-weight:400;background:linear-gradient(180deg,rgba(200,168,78,0.35),rgba(200,168,78,0.05));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;display:block;margin-bottom:0.4rem}
.footer .fo{font-size:0.5rem;letter-spacing:0.8em;opacity:0.15;margin-bottom:0.6rem;color:var(--accent)}
mark{background:rgba(200,168,78,0.2);color:var(--accent2);padding:1px 3px;border-radius:2px}

/* === BOTTOM NAV === */
.bottom-nav{
display:none;position:fixed;bottom:0;left:0;right:0;z-index:200;
background:rgba(14,14,18,0.94);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
border-top:1px solid var(--border);padding:0.35rem 0 calc(0.35rem + env(safe-area-inset-bottom));
justify-content:space-around;align-items:center;
}
.bottom-nav button{
background:none;border:none;color:var(--text3);font-size:0.6rem;
display:flex;flex-direction:column;align-items:center;gap:2px;
cursor:pointer;padding:0.3rem 0.6rem;transition:color .2s;font-family:var(--font-vi);min-width:52px;
}
.bottom-nav button svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.5}
.bottom-nav button:hover,.bottom-nav button.active{color:var(--accent)}
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.5);z-index:140;backdrop-filter:blur(2px)}
.sidebar-overlay.open{display:block}
.mob-tabs{display:none;border-bottom:1px solid var(--border);padding:0}
.mob-tabs button{flex:1;background:none;border:none;border-bottom:2px solid transparent;color:var(--text3);font-size:0.7rem;padding:0.5rem 0.3rem;cursor:pointer;font-family:var(--font-vi);transition:all .2s}
.mob-tabs button.active{color:var(--accent);border-bottom-color:var(--accent)}

/* === RESPONSIVE === */
@media(max-width:1100px){.sidebar{width:180px}.main{padding:1.2rem 1.2rem 3rem}.chc{padding:1rem 1.1rem}}
@media(max-width:900px){.cbd{grid-template-columns:1fr 1fr}.col-v{grid-column:1/-1;border-top:1px solid var(--border)}.chc:nth-child(2){border-right:none}}
@media(max-width:768px){
.header{padding:0.4rem 0.6rem 0.35rem}
.header h1{font-size:1.4rem}
.header .sub{display:none}
.ssel{justify-content:flex-start;padding:0.2rem 0;gap:0.2rem}
.sb{font-size:0.6rem;padding:0.18rem 0.4rem;border-radius:12px}
.header-row{margin:0.25rem auto 0;gap:0.3rem}
.sw input{padding:0.35rem 0.7rem 0.35rem 1.8rem;font-size:0.78rem}
.hc{display:none}
.sidebar{display:none;position:fixed;top:0;left:0;width:280px;height:100%;z-index:150;box-shadow:4px 0 30px rgba(0,0,0,0.6);border-right:1px solid var(--border)}
.sidebar.open{display:block}
.bottom-nav{display:flex}
.main{padding:0.5rem 0.4rem 4.5rem}
.cbd{grid-template-columns:1fr}
.chc:not(:last-child){border-right:none;border-bottom:1px solid var(--border)}
.chc{padding:0.8rem 1rem}
.cwm{display:none}
.chd{padding:0.6rem 0.8rem}
.mob-tabs{display:flex}
.chapter.tab-h .col-hv,.chapter.tab-h .col-v{display:none}
.chapter.tab-hv .col-h,.chapter.tab-hv .col-v{display:none}
.chapter.tab-v .col-h,.chapter.tab-v .col-hv{display:none}
.scroll-top{bottom:4.5rem;left:0.8rem}
.footer{padding:1.5rem 1rem 5rem}
.stats{font-size:0.58rem;padding:0.15rem}
}
@media(max-width:380px){.header h1{font-size:1.2rem}.sb{font-size:0.55rem}}