/* roulang page: index */
:root{
    --bg:#F3F0E9;
    --surface:#FFFFFF;
    --surface-2:#EBE7DE;
    --ink:#171812;
    --ink-soft:#3F4239;
    --muted:#73776D;
    --line:#E3DFD4;
    --accent:#2E5B4A;
    --accent-deep:#1F4034;
    --accent-soft:#E2ECE5;
    --dark-1:#141512;
    --dark-2:#1D1F1A;
    --on-dark:#F3F0E9;
    --danger:#B3382C;
    --success:#2F6B4F;
    --serif:"Noto Serif SC","Songti SC","STSong",SimSun,serif;
    --sans:-apple-system,"PingFang SC","Microsoft YaHei","Helvetica Neue",sans-serif;
    --digital:"Space Grotesk","Inter",sans-serif;
    --radius:8px;
    --shadow:0 1px 2px rgba(20,22,18,.04),0 8px 24px rgba(20,22,18,.06);
    --shadow-hover:0 2px 4px rgba(20,22,18,.05),0 16px 32px rgba(20,22,18,.10);
    --transition:all .25s cubic-bezier(.2,.6,.2,1);
}
*,*::before,*::after{
    box-sizing:border-box;margin:0;padding:0;
}
html{
    scroll-behavior:smooth;
}
body{
    font-family:var(--sans);
    font-size:16px;
    line-height:1.75;
    background:var(--bg);
    color:var(--ink);
    letter-spacing:.02em;
    -webkit-font-smoothing:antialiased;
}
a{
    color:var(--ink);
    text-decoration:none;
    transition:var(--transition);
}
a:hover{
    color:var(--accent);
}
img{
    max-width:100%;
    display:block;
}
button,input{
    font-family:inherit;
    font-size:inherit;
    border:none;
    background:none;
    outline:none;
}
.container{
    max-width:1280px;
    margin:0 auto;
    padding:0 24px;
}
h1,h2,h3{
    font-family:var(--serif);
    line-height:1.2;
    letter-spacing:.01em;
}
h1{
    font-size:clamp(2.25rem,5vw,3.75rem);
}
h2{
    font-size:clamp(1.5rem,2.5vw,2.25rem);
}
h3{
    font-size:1.125rem;
}
p{
    line-height:1.75;
}
.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:12px 28px;
    border-radius:8px;
    font-size:15px;
    font-weight:600;
    letter-spacing:.02em;
    cursor:pointer;
    transition:var(--transition);
    border:1px solid transparent;
    min-height:46px;
    line-height:1;
}
.btn-accent{
    background:var(--accent);
    color:#fff;
}
.btn-accent:hover{
    background:var(--accent-deep);
    color:#fff;
    transform:translateY(-1px);
    box-shadow:0 8px 20px rgba(46,91,74,.28);
}
.btn-accent:active{
    transform:translateY(0);
    box-shadow:none;
}
.btn-outline{
    background:transparent;
    color:#fff;
    border-color:rgba(255,255,255,.7);
}
.btn-outline:hover{
    background:rgba(255,255,255,.08);
    color:#fff;
    border-color:#fff;
}
.btn-outline-dark{
    background:transparent;
    color:var(--ink);
    border-color:var(--line);
}
.btn-outline-dark:hover{
    background:var(--surface-2);
    color:var(--ink);
    border-color:var(--ink);
}
.btn:focus-visible{
    outline:2px solid var(--accent);
    outline-offset:2px;
}
/* App Shell */
.app-sidebar{
    position:fixed;
    left:0;top:0;
    width:240px;
    height:100vh;
    background:var(--dark-1);
    display:flex;
    flex-direction:column;
    z-index:100;
    padding:0 0 20px;
}
.sidebar-logo{
    height:64px;
    display:flex;
    align-items:center;
    gap:10px;
    padding:0 20px;
    border-bottom:1px solid rgba(255,255,255,.06);
}
.logo-mark{
    width:8px;height:8px;
    background:var(--accent);
    border-radius:2px;
    transform:rotate(45deg);
    flex-shrink:0;
}
.logo-text{
    font-family:var(--serif);
    font-size:20px;
    font-weight:700;
    color:#fff;
    letter-spacing:.06em;
}
.sidebar-tagline{
    font-size:12px;
    color:rgba(255,255,255,.4);
    padding:10px 20px 18px;
    letter-spacing:.08em;
    line-height:1.6;
}
.sidebar-nav{
    flex:1;
    display:flex;
    flex-direction:column;
    padding-top:8px;
}
.sidebar-nav .nav-link{
    display:flex;
    align-items:center;
    height:44px;
    padding:0 20px;
    font-size:15px;
    color:rgba(255,255,255,.62);
    position:relative;
    transition:var(--transition);
}
.sidebar-nav .nav-link:hover{
    background:rgba(255,255,255,.04);
    color:rgba(255,255,255,.9);
}
.sidebar-nav .nav-link.active{
    color:#fff;
    background:rgba(255,255,255,.03);
}
.sidebar-nav .nav-link.active::before{
    content:"";
    position:absolute;
    left:0;top:10px;bottom:10px;
    width:3px;
    background:var(--accent);
    border-radius:0 3px 3px 0;
}
.sidebar-cta{
    margin:0 16px;
    height:44px;
    display:flex;
    align-items:center;
    justify-content:center;
    background:var(--accent);
    color:#fff;
    border-radius:var(--radius);
    font-size:14px;
    font-weight:600;
    transition:var(--transition);
}
.sidebar-cta:hover{
    background:var(--accent-deep);
    color:#fff;
}
.main-wrap{
    margin-left:240px;
    min-height:100vh;
    display:flex;
    flex-direction:column;
}
.main-content{
    flex:1;
}
/* Mobile topbar */
.mobile-topbar{
    display:none;
    position:fixed;
    top:0;left:0;right:0;
    height:56px;
    background:var(--dark-1);
    z-index:200;
    align-items:center;
    justify-content:space-between;
    padding:0 16px;
}
.mobile-logo{
    font-family:var(--serif);
    color:#fff;
    font-size:18px;
    font-weight:700;
    letter-spacing:.06em;
    display:flex;
    align-items:center;
    gap:8px;
}
.mobile-menu-toggle{
    width:40px;height:40px;
    display:flex;
    align-items:center;
    justify-content:center;
    color:#fff;
    font-size:22px;
    cursor:pointer;
    border-radius:6px;
}
.mobile-menu-toggle:hover{
    background:rgba(255,255,255,.08);
}
.drawer-overlay{
    display:none;
    position:fixed;
    inset:0;
    background:rgba(0,0,0,.4);
    z-index:299;
    opacity:0;
    transition:opacity .3s;
}
.drawer-overlay.active{
    display:block;
    opacity:1;
}
.drawer{
    position:fixed;
    left:0;top:0;bottom:0;
    width:280px;
    background:var(--dark-1);
    z-index:300;
    transform:translateX(-100%);
    transition:transform .35s cubic-bezier(.2,.6,.2,1);
    display:flex;
    flex-direction:column;
    padding:0 0 24px;
}
.drawer.active{
    transform:translateX(0);
}
.drawer-head{
    height:64px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:0 16px;
    border-bottom:1px solid rgba(255,255,255,.06);
}
.drawer-logo{
    font-family:var(--serif);
    color:#fff;
    font-size:18px;
    font-weight:700;
    letter-spacing:.06em;
    display:flex;
    align-items:center;
    gap:8px;
}
.drawer-close{
    width:36px;height:36px;
    color:rgba(255,255,255,.6);
    font-size:24px;
    cursor:pointer;
    border-radius:6px;
    display:flex;
    align-items:center;
    justify-content:center;
}
.drawer-close:hover{
    background:rgba(255,255,255,.08);
    color:#fff;
}
.drawer-nav{
    flex:1;
    padding:16px 0;
}
.drawer-nav .nav-link{
    display:flex;
    align-items:center;
    height:46px;
    padding:0 20px;
    color:rgba(255,255,255,.62);
    font-size:15px;
    position:relative;
}
.drawer-nav .nav-link:hover{
    background:rgba(255,255,255,.04);
    color:#fff;
}
.drawer-nav .nav-link.active{
    color:#fff;
}
.drawer-nav .nav-link.active::before{
    content:"";
    position:absolute;
    left:0;top:10px;bottom:10px;
    width:3px;
    background:var(--accent);
    border-radius:0 3px 3px 0;
}
.drawer-cta{
    margin:0 16px;
    height:44px;
    display:flex;
    align-items:center;
    justify-content:center;
    background:var(--accent);
    color:#fff;
    border-radius:var(--radius);
    font-size:14px;
    font-weight:600;
}
/* Hero */
.hero{
    position:relative;
    min-height:min(100vh,760px);
    display:flex;
    align-items:center;
    background-size:cover;
    background-position:center;
    overflow:hidden;
}
.hero-overlay{
    position:absolute;
    inset:0;
    background:linear-gradient(90deg,rgba(20,21,18,.78) 0%,rgba(20,21,18,.42) 55%,rgba(20,21,18,.18) 100%);
}
.hero-inner{
    position:relative;
    z-index:2;
    max-width:1280px;
    width:100%;
    margin:0 auto;
    padding:0 48px;
    padding-bottom:60px;
    color:#fff;
}
.hero-kicker{
    display:inline-block;
    font-size:13px;
    letter-spacing:.2em;
    color:rgba(255,255,255,.6);
    border:1px solid rgba(255,255,255,.18);
    border-radius:999px;
    padding:5px 14px;
    margin-bottom:24px;
}
.hero-title{
    color:#fff;
    max-width:640px;
    margin-bottom:16px;
}
.h1-sub{
    display:block;
    font-size:clamp(1.25rem,2vw,1.75rem);
    font-family:var(--serif);
    font-weight:400;
    color:rgba(255,255,255,.85);
    margin-top:12px;
}
.hero-sub{
    font-size:clamp(1rem,1.5vw,1.125rem);
    color:rgba(255,255,255,.78);
    max-width:480px;
    margin-bottom:32px;
    line-height:1.8;
}
.hero-actions{
    display:flex;
    gap:16px;
    flex-wrap:wrap;
}
.hero-info{
    position:absolute;
    left:0;right:0;
    bottom:0;
    z-index:3;
    border-top:1px solid rgba(255,255,255,.12);
    padding:18px 48px;
    display:flex;
    gap:32px;
    flex-wrap:wrap;
    font-size:13px;
    color:rgba(255,255,255,.65);
    letter-spacing:.04em;
    background:linear-gradient(0deg,rgba(20,21,18,.3),transparent);
}
.hero-info span{
    display:inline-flex;
    align-items:center;
    gap:8px;
}
.hero-info span::before{
    content:"";
    width:4px;height:4px;
    border-radius:50%;
    background:var(--accent);
}
/* Section */
.section{
    padding:80px 0;
}
.section-soft{
    background:var(--surface-2);
}
.section-dark{
    background:var(--dark-1);
    color:var(--on-dark);
}
.section-head{
    max-width:1280px;
    margin:0 auto;
    padding:0 24px;
    display:flex;
    align-items:flex-end;
    justify-content:space-between;
    margin-bottom:36px;
    gap:16px;
}
.section-title{
    font-size:clamp(1.5rem,2.5vw,2.25rem);
    color:var(--ink);
    display:flex;
    align-items:baseline;
    gap:12px;
}
.section-dark .section-title{
    color:var(--on-dark);
}
.section-index{
    font-family:var(--digital);
    font-size:.75em;
    color:var(--accent);
    font-weight:500;
    letter-spacing:.05em;
}
.section-link{
    font-size:14px;
    color:var(--muted);
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding-bottom:4px;
    border-bottom:1px solid transparent;
}
.section-link:hover{
    color:var(--accent);
    border-color:var(--accent);
}
.section-dark .section-link{
    color:rgba(255,255,255,.5);
}
.section-dark .section-link:hover{
    color:#fff;
    border-color:rgba(255,255,255,.4);
}
/* Horizontal scroll */
.hscroll{
    max-width:1280px;
    margin:0 auto;
    padding:0 24px;
    display:flex;
    gap:20px;
    overflow-x:auto;
    scroll-snap-type:x mandatory;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:none;
    padding-bottom:12px;
}
.hscroll::-webkit-scrollbar{
    display:none;
}
.hscroll-card{
    flex:0 0 clamp(200px,26vw,280px);
    scroll-snap-align:start;
    background:var(--surface);
    border-radius:var(--radius);
    overflow:hidden;
    box-shadow:var(--shadow);
    border:1px solid var(--line);
    transition:var(--transition);
    display:flex;
    flex-direction:column;
}
.hscroll-card:hover{
    box-shadow:var(--shadow-hover);
    border-color:rgba(46,91,74,.4);
    transform:translateY(-2px);
}
.card-cover{
    position:relative;
    aspect-ratio:16/10;
    overflow:hidden;
    background:var(--surface-2);
}
.card-cover img{
    width:100%;height:100%;
    object-fit:cover;
    transition:transform .45s cubic-bezier(.2,.6,.2,1);
}
.hscroll-card:hover .card-cover img{
    transform:scale(1.05);
}
.card-badge{
    position:absolute;
    top:12px;left:12px;
    background:var(--accent);
    color:#fff;
    font-size:12px;
    padding:3px 12px;
    border-radius:999px;
    letter-spacing:.03em;
    z-index:2;
}
.card-badge-dark{
    background:rgba(20,21,18,.78);
    color:#fff;
}
.card-body{
    padding:14px 16px 18px;
    flex:1;
    display:flex;
    flex-direction:column;
    gap:6px;
}
.card-body h3{
    font-size:1.0625rem;
    line-height:1.4;
    display:-webkit-box;
    -webkit-line-clamp:1;
    -webkit-box-orient:vertical;
    overflow:hidden;
}
.card-body p{
    font-size:.875rem;
    color:var(--muted);
    line-height:1.6;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
}
/* Featured */
.featured-grid{
    max-width:1280px;
    margin:0 auto;
    padding:0 24px;
    display:grid;
    grid-template-columns:8fr 4fr;
    gap:24px;
}
.featured-main{
    position:relative;
    border-radius:var(--radius);
    overflow:hidden;
    min-height:380px;
    display:flex;
    align-items:flex-end;
    background-size:cover;
    background-position:center;
    box-shadow:var(--shadow);
    transition:var(--transition);
}
.featured-main:hover{
    box-shadow:var(--shadow-hover);
}
.featured-main-mask{
    position:absolute;
    inset:0;
    background:linear-gradient(180deg,rgba(20,21,18,0) 35%,rgba(20,21,18,.82) 100%);
}
.featured-main-content{
    position:relative;
    z-index:2;
    padding:32px;
    color:#fff;
    width:100%;
}
.featured-main-content .card-badge{
    position:static;
    display:inline-block;
    margin-bottom:12px;
}
.featured-main-content h3{
    font-size:clamp(1.4rem,2vw,1.875rem);
    color:#fff;
    margin-bottom:8px;
}
.featured-main-content p{
    color:rgba(255,255,255,.78);
    font-size:.9375rem;
    margin-bottom:16px;
    max-width:420px;
    line-height:1.7;
}
.featured-link{
    font-size:14px;
    color:rgba(255,255,255,.9);
    display:inline-flex;
    align-items:center;
    gap:6px;
    transition:var(--transition);
}
.featured-main:hover .featured-link{
    color:#fff;
    gap:10px;
}
.featured-side{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius);
    padding:0 24px;
    box-shadow:var(--shadow);
    display:flex;
    flex-direction:column;
    justify-content:center;
}
.feature-item{
    display:block;
    padding:18px 0;
    border-bottom:1px solid var(--line);
    transition:var(--transition);
    position:relative;
}
.feature-item:last-child{
    border-bottom:none;
}
.feature-item h3{
    font-size:1rem;
    line-height:1.4;
    margin-bottom:6px;
    transition:var(--transition);
}
.feature-item p{
    font-size:.8125rem;
    color:var(--muted);
    line-height:1.6;
    margin-bottom:8px;
    display:-webkit-box;
    -webkit-line-clamp:1;
    -webkit-box-orient:vertical;
    overflow:hidden;
}
.feature-item-meta{
    font-size:12px;
    color:var(--muted);
    letter-spacing:.03em;
}
.feature-item:hover{
    background:var(--surface-2);
    padding-left:8px;
}
.feature-item:hover h3{
    color:var(--accent);
}
.feature-item:hover::after{
    content:"→";
    position:absolute;
    right:4px;top:50%;
    transform:translateY(-50%);
    color:var(--accent);
    font-size:16px;
    transition:var(--transition);
    opacity:0;
}
.feature-item:hover::after{
    opacity:1;
}
/* Zone */
.zone-section{
    background:var(--bg);
}
.zone-section .hscroll-card{
    background:var(--surface);
}
/* CTA */
.cta-section{
    position:relative;
    padding:100px 0;
    background-size:cover;
    background-position:center;
    overflow:hidden;
}
.cta-mask{
    position:absolute;
    inset:0;
    background:linear-gradient(180deg,rgba(20,21,18,.85) 0%,rgba(20,21,18,.92) 100%);
}
.cta-inner{
    position:relative;
    z-index:2;
    max-width:720px;
    margin:0 auto;
    text-align:center;
    padding:0 24px;
}
.cta-inner h2{
    color:#fff;
    font-size:clamp(1.75rem,3vw,2.375rem);
    margin-bottom:12px;
    line-height:1.3;
}
.cta-inner p{
    color:rgba(255,255,255,.68);
    font-size:1rem;
    margin-bottom:36px;
}
.cta-form{
    display:flex;
    gap:12px;
    flex-wrap:wrap;
    justify-content:center;
    position:relative;
}
.form-input{
    flex:1;
    min-width:260px;
    height:48px;
    padding:0 16px;
    background:rgba(255,255,255,.06);
    border:1px solid rgba(255,255,255,.25);
    border-radius:var(--radius);
    color:#fff;
    font-size:15px;
    transition:var(--transition);
}
.form-input::placeholder{
    color:rgba(255,255,255,.4);
}
.form-input:focus{
    border-color:var(--accent);
    background:rgba(255,255,255,.1);
}
.form-message{
    flex-basis:100%;
    font-size:14px;
    min-height:24px;
    color:rgba(255,255,255,.7);
    padding-top:12px;
    text-align:left;
}
.form-message.success{
    color:#7ec8a3;
}
.form-message.error{
    color:#d68a7e;
}
/* News list */
.news-list{
    max-width:1280px;
    margin:0 auto;
    padding:0 24px;
    display:flex;
    flex-direction:column;
    gap:0;
}
.news-card{
    display:flex;
    gap:20px;
    padding:28px 0;
    border-bottom:1px solid var(--line);
    transition:var(--transition);
}
.news-card:first-child{
    padding-top:0;
}
.news-thumb{
    flex-shrink:0;
    width:200px;
    height:126px;
    border-radius:var(--radius);
    overflow:hidden;
    background:var(--surface-2);
}
.news-thumb img{
    width:100%;height:100%;
    object-fit:cover;
    transition:transform .45s;
}
.news-card:hover .news-thumb img{
    transform:scale(1.04);
}
.news-body{
    flex:1;
    display:flex;
    flex-direction:column;
    justify-content:center;
}
.news-body h3{
    font-size:1.125rem;
    margin-bottom:8px;
    line-height:1.4;
}
.news-body h3 a{
    color:var(--ink);
}
.news-body h3 a:hover{
    color:var(--accent);
}
.news-body > p{
    font-size:.875rem;
    color:var(--muted);
    line-height:1.6;
    margin-bottom:12px;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
}
.news-meta{
    display:flex;
    align-items:center;
    gap:10px;
    font-size:13px;
    color:var(--muted);
}
.news-meta .dot{
    width:5px;height:5px;
    border-radius:50%;
    background:var(--accent);
    display:inline-block;
}
/* Empty state */
.empty-state{
    border:1px dashed var(--line);
    border-radius:var(--radius);
    padding:48px 32px;
    text-align:center;
    background:var(--surface);
}
.empty-icon{
    font-size:28px;
    color:var(--muted);
    margin-bottom:12px;
    opacity:.6;
}
.empty-title{
    font-family:var(--serif);
    font-size:1.125rem;
    color:var(--ink-soft);
    margin-bottom:6px;
}
.empty-sub{
    font-size:.875rem;
    color:var(--muted);
}
/* FAQ */
.faq-list{
    max-width:860px;
    margin:0 auto;
    padding:0 24px;
}
.faq-item{
    border-bottom:1px solid var(--line);
}
.faq-item:first-child{
    border-top:1px solid var(--line);
}
.faq-question{
    width:100%;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding:24px 0;
    text-align:left;
    cursor:pointer;
    font-family:var(--serif);
    font-size:1.0625rem;
    font-weight:600;
    color:var(--ink);
    transition:var(--transition);
}
.faq-question:hover{
    color:var(--accent);
}
.faq-icon{
    flex-shrink:0;
    width:28px;height:28px;
    border:1px solid var(--line);
    border-radius:50%;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:16px;
    color:var(--muted);
    transition:transform .3s cubic-bezier(.2,.6,.2,1),color .3s,border-color .3s;
}
.faq-item.active .faq-icon{
    transform:rotate(45deg);
    color:var(--accent);
    border-color:var(--accent);
}
.faq-answer{
    max-height:0;
    overflow:hidden;
    transition:max-height .35s ease,padding .35s ease;
}
.faq-item.active .faq-answer{
    max-height:320px;
    padding-bottom:24px;
}
.faq-answer p{
    font-size:.9375rem;
    color:var(--muted);
    line-height:1.7;
}
/* Footer */
.site-footer{
    background:var(--dark-1);
    color:rgba(255,255,255,.7);
    padding:64px 0 32px;
}
.footer-inner{
    max-width:1280px;
    margin:0 auto;
    padding:0 24px;
    display:grid;
    grid-template-columns:1.4fr 1fr 1fr;
    gap:48px;
}
.footer-brand .logo-text{
    font-size:22px;
}
.footer-desc{
    font-size:.875rem;
    color:rgba(255,255,255,.5);
    margin-top:14px;
    max-width:280px;
    line-height:1.7;
}
.footer-title{
    font-size:14px;
    color:#fff;
    font-weight:600;
    margin-bottom:18px;
    letter-spacing:.04em;
}
.footer-nav-list{
    list-style:none;
}
.footer-nav-list li{
    margin-bottom:12px;
}
.footer-nav-list a{
    font-size:.9375rem;
    color:rgba(255,255,255,.55);
    transition:var(--transition);
}
.footer-nav-list a:hover{
    color:#fff;
    padding-left:4px;
}
.footer-contact p{
    font-size:.9375rem;
    color:rgba(255,255,255,.55);
    line-height:1.8;
    margin-bottom:8px;
}
.footer-bottom{
    max-width:1280px;
    margin:48px auto 0;
    padding:24px 24px 0;
    border-top:1px solid rgba(255,255,255,.08);
    display:flex;
    justify-content:space-between;
    gap:12px;
    flex-wrap:wrap;
    font-size:13px;
    color:rgba(255,255,255,.4);
}
/* Reveal animation */
.reveal{
    opacity:0;
    transform:translateY(12px);
    transition:opacity .5s ease,transform .5s ease;
}
.reveal.visible{
    opacity:1;
    transform:translateY(0);
}
/* Responsive */
@media (max-width:1023px){
    .featured-grid{
        grid-template-columns:1fr;
    }
    .featured-main{
        min-height:320px;
    }
}
@media (max-width:767px){
    .app-sidebar{
        display:none;
    }
    .main-wrap{
        margin-left:0;
        padding-top:56px;
    }
    .mobile-topbar{
        display:flex;
    }
    .section{
        padding:56px 0;
    }
    .section-head{
        padding:0 16px;
        margin-bottom:28px;
    }
    .hscroll{
        padding:0 16px;
    }
    .featured-grid{
        padding:0 16px;
    }
    .news-list{
        padding:0 16px;
    }
    .news-card{
        flex-direction:column;
        gap:14px;
        padding:20px 0;
    }
    .news-thumb{
        width:100%;
        height:auto;
        aspect-ratio:16/9;
    }
    .hero-inner{
        padding:0 20px;
        padding-bottom:70px;
    }
    .hero-info{
        padding:14px 20px;
        gap:12px;
        font-size:12px;
    }
    .hero-info span{
        flex-basis:auto;
    }
    .cta-section{
        padding:64px 0;
    }
    .cta-form{
        flex-direction:column;
    }
    .form-input{
        width:100%;
        min-width:0;
    }
    .cta-form .btn{
        width:100%;
    }
    .footer-inner{
        grid-template-columns:1fr;
        gap:32px;
        padding:0 16px;
    }
    .footer-bottom{
        padding:20px 16px 0;
        flex-direction:column;
        justify-content:center;
        text-align:center;
    }
    .footer-brand .logo-text{
        font-size:20px;
    }
}
@media (max-width:520px){
    .hero-actions{
        flex-direction:column;
        width:100%;
    }
    .hero-actions .btn{
        width:100%;
    }
    .featured-main-content{
        padding:20px;
    }
    .featured-main-content h3{
        font-size:1.25rem;
    }
    .news-thumb{
        aspect-ratio:16/9;
    }
    .feature-item{
        padding:14px 0;
    }
}

/* roulang page: category1 */
:root {
        --bg: #F3F0E9;
        --surface: #FFFFFF;
        --surface-2: #EBE7DE;
        --ink: #171812;
        --ink-soft: #3F4239;
        --muted: #73776D;
        --line: #E3DFD4;
        --accent: #2E5B4A;
        --accent-deep: #1F4034;
        --accent-soft: #E2ECE5;
        --dark-1: #141512;
        --dark-2: #1D1F1A;
        --on-dark: #F3F0E9;
        --danger: #B3382C;
        --success: #2F6B4F;
        --radius: 8px;
        --shadow-sm: 0 1px 2px rgba(20,22,18,.04), 0 8px 24px rgba(20,22,18,.06);
        --shadow-lg: 0 2px 4px rgba(20,22,18,.05), 0 16px 32px rgba(20,22,18,.10);
        --ease: cubic-bezier(.2,.6,.2,1);
        --sidebar-w: 240px;
        --topbar-h: 56px;
        --font-serif: "Noto Serif SC", "Songti SC", SimSun, serif;
        --font-sans: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
        --font-num: "Space Grotesk", "Inter", sans-serif;
    }

    *,
    *::before,
    *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
    }
    body {
        font-family: var(--font-sans);
        font-size: 16px;
        line-height: 1.75;
        color: var(--ink);
        background: var(--bg);
        letter-spacing: .02em;
        -webkit-font-smoothing: antialiased;
    }
    img {
        max-width: 100%;
        display: block;
    }
    a {
        color: var(--ink);
        text-decoration: none;
        transition: color .25s var(--ease);
    }
    a:hover {
        color: var(--accent);
    }
    button,
    input {
        font: inherit;
        border: none;
        background: none;
        color: inherit;
    }
    ul,
    ol {
        list-style: none;
    }

    .app-sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        width: var(--sidebar-w);
        background: var(--dark-1);
        display: flex;
        flex-direction: column;
        padding: 24px 16px 20px;
        z-index: 120;
        transition: transform .3s var(--ease);
        overflow-y: auto;
    }
    .sidebar-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        padding: 0 8px;
        height: 64px;
    }
    .logo-mark {
        width: 8px;
        height: 8px;
        background: var(--accent);
        display: inline-block;
        flex-shrink: 0;
    }
    .logo-text {
        font-family: var(--font-serif);
        font-size: 22px;
        font-weight: 700;
        color: #fff;
        letter-spacing: .05em;
        white-space: nowrap;
    }
    .sidebar-tagline {
        font-size: 12px;
        color: rgba(255,255,255,.4);
        padding: 0 8px 24px;
        letter-spacing: .18em;
    }
    .sidebar-nav {
        display: flex;
        flex-direction: column;
        gap: 2px;
    }
    .nav-link {
        display: block;
        padding: 0 20px;
        height: 44px;
        line-height: 44px;
        font-size: 15px;
        color: rgba(255,255,255,.62);
        border-radius: 6px;
        transition: all .25s var(--ease);
        position: relative;
    }
    .nav-link:hover {
        background: rgba(255,255,255,.05);
        color: #fff;
    }
    .nav-link.active {
        color: #fff;
        background: rgba(255,255,255,.04);
    }
    .nav-link.active::before {
        content: "";
        position: absolute;
        left: 0;
        top: 8px;
        bottom: 8px;
        width: 3px;
        background: var(--accent);
        border-radius: 0 3px 3px 0;
    }
    .sidebar-cta {
        margin-top: auto;
        display: block;
        text-align: center;
        padding: 0 16px;
        height: 40px;
        line-height: 40px;
        background: var(--accent);
        color: #fff;
        border-radius: var(--radius);
        font-size: 14px;
        transition: background .25s var(--ease);
    }
    .sidebar-cta:hover {
        background: var(--accent-deep);
        color: #fff;
    }
    .sidebar-close {
        display: none;
        position: absolute;
        top: 16px;
        right: 16px;
        width: 32px;
        height: 32px;
        border-radius: 50%;
        border: 1px solid rgba(255,255,255,.25);
        color: rgba(255,255,255,.7);
        font-size: 18px;
        line-height: 1;
        cursor: pointer;
        align-items: center;
        justify-content: center;
    }

    .mobile-topbar {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        height: var(--topbar-h);
        background: var(--dark-1);
        z-index: 110;
        align-items: center;
        justify-content: space-between;
        padding: 0 16px;
    }
    .topbar-logo {
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .menu-toggle {
        width: 40px;
        height: 40px;
        border-radius: 6px;
        cursor: pointer;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 5px;
    }
    .menu-toggle span {
        display: block;
        width: 18px;
        height: 2px;
        background: rgba(255,255,255,.8);
        border-radius: 2px;
        transition: background .25s;
    }
    .menu-toggle:hover span {
        background: #fff;
    }
    .sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,.4);
        z-index: 105;
        opacity: 0;
        pointer-events: none;
        transition: opacity .3s var(--ease);
    }
    .sidebar-overlay.active {
        opacity: 1;
        pointer-events: auto;
    }

    .main-content {
        margin-left: var(--sidebar-w);
        min-height: 100vh;
        display: flex;
        flex-direction: column;
    }

    .container {
        max-width: 1280px;
        margin: 0 auto;
        padding: 0 24px;
        width: 100%;
    }
    .section {
        padding: 80px 0;
    }
    .section-alt {
        background: var(--surface-2);
    }
    .section-head {
        margin-bottom: 48px;
    }
    .section-head.centered {
        text-align: center;
    }
    .section-tag {
        display: block;
        font-size: 13px;
        color: var(--accent);
        letter-spacing: .1em;
        margin-bottom: 10px;
        font-weight: 600;
    }
    .section-title {
        font-family: var(--font-serif);
        font-size: clamp(1.5rem, 2.5vw, 2.25rem);
        line-height: 1.25;
        color: var(--ink);
        letter-spacing: .01em;
        font-weight: 700;
    }
    .section-desc {
        font-size: 15px;
        color: var(--muted);
        max-width: 640px;
        margin-top: 12px;
        line-height: 1.7;
    }
    .section-head.centered .section-desc {
        margin-left: auto;
        margin-right: auto;
    }

    .page-hero {
        position: relative;
        height: 380px;
        min-height: 300px;
        overflow: hidden;
        display: flex;
        align-items: center;
    }
    .page-hero-bg {
        position: absolute;
        inset: 0;
        background-size: cover;
        background-position: center;
    }
    .page-hero-overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(90deg, rgba(20,24,18,.88) 0%, rgba(20,24,18,.55) 55%, rgba(20,24,18,.15) 100%);
    }
    .page-hero-content {
        position: relative;
        z-index: 2;
        max-width: 1280px;
        margin: 0 auto;
        padding: 0 24px;
        width: 100%;
    }
    .breadcrumb {
        font-size: 13px;
        color: rgba(255,255,255,.6);
        margin-bottom: 16px;
        letter-spacing: .03em;
    }
    .breadcrumb a {
        color: rgba(255,255,255,.75);
    }
    .breadcrumb a:hover {
        color: #fff;
    }
    .breadcrumb-sep {
        margin: 0 8px;
        color: rgba(255,255,255,.35);
    }
    .page-hero h1 {
        font-family: var(--font-serif);
        font-size: clamp(2.25rem, 5vw, 3.5rem);
        line-height: 1.15;
        color: #fff;
        margin-bottom: 14px;
        letter-spacing: .01em;
        font-weight: 700;
    }
    .page-hero p {
        font-size: 18px;
        color: rgba(255,255,255,.8);
        max-width: 640px;
        line-height: 1.7;
    }

    .category-intro {
        padding: 56px 0 32px;
    }
    .category-desc {
        font-size: 16px;
        color: var(--ink-soft);
        max-width: 880px;
        line-height: 1.85;
    }
    .tag-filter {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        margin-top: 28px;
    }
    .tag-chip {
        display: inline-block;
        padding: 6px 18px;
        border-radius: 999px;
        border: 1px solid var(--line);
        font-size: 13px;
        color: var(--ink-soft);
        background: var(--surface);
        cursor: pointer;
        transition: all .25s var(--ease);
        line-height: 1.4;
    }
    .tag-chip:hover {
        border-color: var(--accent);
        color: var(--accent);
    }
    .tag-chip.active {
        background: var(--accent);
        border-color: var(--accent);
        color: #fff;
    }

    .feature-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
    .feature-card {
        background: var(--surface);
        border: 1px solid var(--line);
        border-radius: var(--radius);
        padding: 36px 30px;
        box-shadow: var(--shadow-sm);
        transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
    }
    .feature-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-lg);
        border-color: rgba(46,91,74,.4);
    }
    .feature-icon {
        width: 46px;
        height: 46px;
        border-radius: 12px;
        background: var(--accent-soft);
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--accent);
        font-size: 20px;
        margin-bottom: 20px;
    }
    .feature-card h3 {
        font-family: var(--font-serif);
        font-size: 1.125rem;
        font-weight: 700;
        margin-bottom: 10px;
        line-height: 1.4;
    }
    .feature-card p {
        font-size: 14px;
        color: var(--muted);
        line-height: 1.7;
    }

    .scenario-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 40px;
    }
    .scenario-item {
        border-left: 2px solid var(--accent);
        padding: 4px 0 4px 24px;
    }
    .scenario-item h3 {
        font-family: var(--font-serif);
        font-size: 1.125rem;
        font-weight: 700;
        margin-bottom: 10px;
        line-height: 1.4;
    }
    .scenario-item p {
        color: var(--muted);
        font-size: 14px;
        line-height: 1.7;
    }

    .steps {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 48px;
        counter-reset: steps;
    }
    .step-item {
        position: relative;
        padding-top: 20px;
    }
    .step-item::before {
        counter-increment: steps;
        content: "0" counter(steps);
        font-family: var(--font-num);
        font-size: 13px;
        font-weight: 600;
        color: var(--accent);
        letter-spacing: .08em;
        display: block;
        margin-bottom: 14px;
    }
    .step-item h3 {
        font-family: var(--font-serif);
        font-size: 1.125rem;
        font-weight: 700;
        margin-bottom: 10px;
        line-height: 1.4;
    }
    .step-item p {
        font-size: 14px;
        color: var(--muted);
        line-height: 1.7;
    }

    .spotlight-grid {
        display: grid;
        grid-template-columns: repeat(12, 1fr);
        gap: 24px;
    }
    .spotlight-card {
        grid-column: span 6;
        background: var(--surface);
        border-radius: var(--radius);
        overflow: hidden;
        border: 1px solid var(--line);
        box-shadow: var(--shadow-sm);
        transition: all .25s var(--ease);
    }
    .spotlight-card.wide {
        grid-column: span 7;
    }
    .spotlight-card.narrow {
        grid-column: span 5;
    }
    .spotlight-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-lg);
        border-color: rgba(46,91,74,.4);
    }
    .spotlight-cover {
        aspect-ratio: 16 / 10;
        overflow: hidden;
        background: var(--surface-2);
        position: relative;
    }
    .spotlight-cover img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform .5s var(--ease);
    }
    .spotlight-card:hover .spotlight-cover img {
        transform: scale(1.05);
    }
    .spotlight-body {
        padding: 24px 28px 28px;
    }
    .spotlight-badge {
        display: inline-block;
        background: var(--accent);
        color: #fff;
        font-size: 12px;
        padding: 3px 14px;
        border-radius: 999px;
        margin-bottom: 14px;
        letter-spacing: .04em;
    }
    .spotlight-body h3 {
        font-family: var(--font-serif);
        font-size: 1.25rem;
        font-weight: 700;
        margin-bottom: 8px;
        line-height: 1.4;
    }
    .spotlight-body p {
        font-size: 14px;
        color: var(--muted);
        line-height: 1.6;
    }

    .faq-list {
        max-width: 880px;
    }
    .faq-item {
        border-bottom: 1px solid var(--line);
    }
    .faq-item:first-of-type {
        border-top: 1px solid var(--line);
    }
    .faq-question {
        width: 100%;
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 16px;
        padding: 24px 0;
        font-size: 17px;
        font-weight: 600;
        color: var(--ink);
        cursor: pointer;
        text-align: left;
        font-family: var(--font-sans);
        line-height: 1.5;
        transition: color .25s var(--ease);
    }
    .faq-question:hover {
        color: var(--accent);
    }
    .faq-icon {
        width: 28px;
        height: 28px;
        border: 1px solid var(--line);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        transition: transform .3s var(--ease), border-color .3s var(--ease), color .3s var(--ease);
        color: var(--accent);
        font-size: 18px;
        font-weight: 400;
    }
    .faq-item.open .faq-icon {
        transform: rotate(45deg);
        border-color: var(--accent);
    }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height .35s var(--ease), padding .35s var(--ease);
        color: var(--muted);
        font-size: 15px;
        line-height: 1.75;
    }
    .faq-item.open .faq-answer {
        max-height: 400px;
        padding-bottom: 24px;
    }

    .cta-section {
        background: var(--dark-1);
        padding: 80px 0;
        position: relative;
        overflow: hidden;
    }
    .cta-backdrop {
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
        opacity: .22;
    }
    .cta-inner {
        position: relative;
        z-index: 2;
        text-align: center;
        max-width: 660px;
        margin: 0 auto;
        padding: 0 24px;
    }
    .cta-title {
        font-family: var(--font-serif);
        font-size: clamp(1.75rem, 3.2vw, 2.5rem);
        color: var(--on-dark);
        line-height: 1.3;
        margin-bottom: 16px;
        font-weight: 700;
        letter-spacing: .01em;
    }
    .cta-sub {
        color: rgba(255,255,255,.65);
        font-size: 15px;
        margin-bottom: 32px;
        line-height: 1.7;
    }
    .cta-form {
        display: flex;
        gap: 12px;
        max-width: 500px;
        margin: 0 auto;
    }
    .cta-form input {
        flex: 1;
        height: 48px;
        background: transparent;
        border: 1px solid rgba(255,255,255,.25);
        border-radius: var(--radius);
        padding: 0 18px;
        color: #fff;
        font-size: 14px;
        transition: border-color .25s var(--ease);
    }
    .cta-form input::placeholder {
        color: rgba(255,255,255,.4);
    }
    .cta-form input:focus {
        outline: 2px solid var(--accent);
        outline-offset: 2px;
        border-color: var(--accent);
    }
    .cta-form button {
        height: 48px;
        padding: 0 28px;
        background: var(--accent);
        color: #fff;
        border-radius: var(--radius);
        font-size: 14px;
        cursor: pointer;
        transition: background .25s var(--ease);
        white-space: nowrap;
        font-weight: 500;
    }
    .cta-form button:hover {
        background: var(--accent-deep);
    }
    .cta-form button:focus-visible {
        outline: 2px solid var(--on-dark);
        outline-offset: 2px;
    }
    .form-hint {
        font-size: 13px;
        color: rgba(255,255,255,.5);
        margin-top: 14px;
        min-height: 20px;
    }
    .form-hint.success {
        color: #7FB69A;
    }
    .form-hint.error {
        color: #E07B6D;
    }

    .site-footer {
        background: var(--dark-1);
        padding: 64px 0 32px;
        color: rgba(255,255,255,.6);
        border-top: 1px solid rgba(255,255,255,.06);
    }
    .footer-inner {
        max-width: 1280px;
        margin: 0 auto;
        padding: 0 24px;
        display: grid;
        grid-template-columns: 2fr 1fr 1fr;
        gap: 48px;
        padding-bottom: 48px;
        border-bottom: 1px solid rgba(255,255,255,.08);
    }
    .footer-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        margin-bottom: 16px;
    }
    .footer-logo .logo-text {
        font-family: var(--font-serif);
        font-size: 20px;
        color: #fff;
    }
    .footer-desc {
        font-size: 14px;
        line-height: 1.7;
        color: rgba(255,255,255,.5);
        max-width: 320px;
    }
    .footer-title {
        font-size: 13px;
        letter-spacing: .1em;
        color: rgba(255,255,255,.4);
        margin-bottom: 16px;
        text-transform: uppercase;
    }
    .footer-nav-list li {
        margin-bottom: 10px;
    }
    .footer-nav-list a {
        color: rgba(255,255,255,.65);
        font-size: 14px;
        transition: color .25s var(--ease);
    }
    .footer-nav-list a:hover {
        color: #fff;
    }
    .footer-contact p {
        font-size: 14px;
        color: rgba(255,255,255,.5);
        margin-bottom: 8px;
        line-height: 1.6;
    }
    .footer-bottom {
        max-width: 1280px;
        margin: 0 auto;
        padding: 24px 24px 0;
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 8px;
        font-size: 13px;
        color: rgba(255,255,255,.35);
    }

    .reveal {
        opacity: 0;
        transform: translateY(12px);
        transition: opacity .5s var(--ease), transform .5s var(--ease);
    }
    .reveal.visible {
        opacity: 1;
        transform: translateY(0);
    }

    @media (max-width: 1024px) {
        .feature-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .scenario-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }
        .steps {
            grid-template-columns: 1fr;
            gap: 32px;
        }
        .spotlight-card,
        .spotlight-card.wide,
        .spotlight-card.narrow {
            grid-column: span 12;
        }
        .footer-inner {
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }
    }

    @media (max-width: 767px) {
        .app-sidebar {
            transform: translateX(-100%);
            width: min(320px, 85vw);
        }
        .app-sidebar.open {
            transform: translateX(0);
        }
        .app-sidebar.open .sidebar-close {
            display: flex;
        }
        .mobile-topbar {
            display: flex;
        }
        .sidebar-overlay.active {
            display: block;
            opacity: 1;
            pointer-events: auto;
        }
        .main-content {
            margin-left: 0;
            padding-top: var(--topbar-h);
        }
        .section {
            padding: 56px 0;
        }
        .section-head {
            margin-bottom: 32px;
        }
        .feature-grid {
            grid-template-columns: 1fr;
            gap: 16px;
        }
        .scenario-grid {
            grid-template-columns: 1fr;
            gap: 24px;
        }
        .steps {
            grid-template-columns: 1fr;
            gap: 24px;
        }
        .page-hero {
            height: 320px;
            min-height: 260px;
        }
        .page-hero-content {
            padding: 0 20px;
        }
        .container {
            padding: 0 20px;
        }
        .cta-form {
            flex-direction: column;
        }
        .cta-form button {
            width: 100%;
        }
        .footer-inner {
            grid-template-columns: 1fr;
            gap: 32px;
            padding-bottom: 32px;
        }
        .footer-bottom {
            padding-top: 20px;
        }
    }

    @media (max-width: 520px) {
        .page-hero h1 {
            font-size: 2rem;
        }
        .page-hero p {
            font-size: 16px;
        }
        .section {
            padding: 48px 0;
        }
        .faq-question {
            font-size: 15px;
        }
        .cta-section {
            padding: 56px 0;
        }
        .spotlight-body {
            padding: 20px;
        }
        .feature-card {
            padding: 28px 24px;
        }
    }

/* roulang page: article */
:root {
  --bg: #F3F0E9;
  --surface: #FFFFFF;
  --surface-2: #EBE7DE;
  --ink: #171812;
  --ink-soft: #3F4239;
  --muted: #73776D;
  --line: #E3DFD4;
  --accent: #2E5B4A;
  --accent-deep: #1F4034;
  --accent-soft: #E2ECE5;
  --dark-1: #141512;
  --dark-2: #1D1F1A;
  --on-dark: #F3F0E9;
  --danger: #B3382C;
  --success: #2F6B4F;
  --radius: 8px;
  --shadow: 0 1px 2px rgba(20,22,18,.04), 0 8px 24px rgba(20,22,18,.06);
  --shadow-hover: 0 2px 4px rgba(20,22,18,.05), 0 16px 32px rgba(20,22,18,.10);
  --font-serif: "Noto Serif SC", "Songti SC", SimSun, serif;
  --font-sans: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --ease: cubic-bezier(.2,.6,.2,1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
  font-size: 16px;
  letter-spacing: .02em;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; border: 0; }
a { color: var(--ink); text-decoration: none; transition: color .25s var(--ease); }
a:hover { color: var(--accent); }
button, input { font-family: inherit; font-size: inherit; line-height: inherit; }
button { cursor: pointer; border: none; background: none; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ===== App Shell ===== */
.app-shell { display: flex; min-height: 100vh; }
.app-sidebar {
  width: 240px;
  background: var(--dark-1);
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 200;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}
.app-main {
  flex: 1;
  margin-left: 240px;
  min-width: 0;
}
.mobile-topbar { display: none; }
.sidebar-backdrop { display: none; }

/* ===== Sidebar 内容 ===== */
.sidebar-header {
  padding: 24px 20px 16px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-mark {
  width: 10px; height: 10px;
  background: var(--accent);
  border-radius: 2px;
  display: inline-block;
  flex-shrink: 0;
}
.logo-text {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--on-dark);
  letter-spacing: .06em;
}
.sidebar-tagline {
  display: block;
  font-size: 12px;
  color: rgba(255,255,255,.4);
  margin-top: 8px;
  margin-left: 20px;
  letter-spacing: .1em;
}
.sidebar-close { display: none; }

.sidebar-nav { padding: 16px 0; flex: 1; }
.nav-link {
  display: block;
  height: 44px;
  line-height: 44px;
  padding: 0 20px;
  font-size: 15px;
  color: rgba(255,255,255,.66);
  position: relative;
  transition: background .25s var(--ease), color .25s var(--ease);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.nav-link:hover {
  background: rgba(255,255,255,.04);
  color: rgba(255,255,255,.92);
}
.nav-link.active {
  color: #fff;
}
.nav-link.active::before {
  content: '';
  position: absolute;
  left: 0; top: 10px; bottom: 10px;
  width: 3px;
  background: var(--accent);
  border-radius: 0 2px 2px 0;
}
.sidebar-footer {
  padding: 16px 20px 24px;
}
.sidebar-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  background: var(--accent);
  color: #fff;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  transition: background .25s var(--ease), transform .25s var(--ease);
}
.sidebar-btn:hover {
  background: var(--accent-deep);
  color: #fff;
  transform: translateY(-1px);
}

/* ===== 文章页 Hero ===== */
.article-hero {
  position: relative;
  min-height: 340px;
  background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
  display: flex;
  align-items: flex-end;
}
.article-hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(120deg, rgba(20,21,18,.86) 0%, rgba(20,21,18,.55) 55%, rgba(20,21,18,.22) 100%);
}
.article-hero::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 40px;
  background: linear-gradient(to bottom, transparent, var(--bg));
  pointer-events: none;
}
.article-hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 72px 24px 48px;
}

.breadcrumb {
  font-size: 13px;
  color: rgba(255,255,255,.62);
  margin-bottom: 16px;
  letter-spacing: .02em;
}
.breadcrumb a {
  color: rgba(255,255,255,.78);
  transition: color .25s var(--ease);
}
.breadcrumb a:hover { color: #fff; }
.breadcrumb .sep {
  margin: 0 8px;
  opacity: .4;
}
.breadcrumb .crumb-current {
  color: rgba(255,255,255,.9);
  display: inline-block;
  max-width: 260px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  vertical-align: bottom;
}

.article-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3.6vw, 2.75rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.25;
  letter-spacing: .01em;
  margin-bottom: 20px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,.62);
}
.meta-item { color: rgba(255,255,255,.75); }
.meta-sep { opacity: .4; }

/* ===== 正文阅读区 ===== */
.article-body-wrap {
  background: var(--bg);
  padding: 48px 24px 24px;
}
.article-content {
  max-width: 720px;
  margin: 0 auto;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
  letter-spacing: .02em;
}
.article-content h2 {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--ink);
  margin: 44px 0 16px;
  line-height: 1.3;
}
.article-content h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  margin: 36px 0 12px;
  line-height: 1.35;
}
.article-content h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  margin: 28px 0 10px;
}
.article-content p {
  margin-bottom: 20px;
}
.article-content a {
  color: var(--accent);
  border-bottom: 1px solid rgba(46,91,74,.3);
  transition: border-color .25s var(--ease);
}
.article-content a:hover {
  border-bottom-color: var(--accent);
}
.article-content strong { color: var(--ink); font-weight: 600; }
.article-content em { color: var(--ink); }
.article-content img {
  border-radius: var(--radius);
  margin: 28px auto;
  box-shadow: var(--shadow);
}
.article-content blockquote {
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  padding: 16px 24px;
  margin: 28px 0;
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 15px;
  color: var(--ink-soft);
}
.article-content blockquote p:last-child { margin-bottom: 0; }
.article-content ul,
.article-content ol {
  margin: 16px 0 24px;
  padding-left: 24px;
}
.article-content ul li,
.article-content ol li {
  margin-bottom: 10px;
}
.article-content ul li::marker { color: var(--accent); }
.article-content hr {
  border: none;
  border-top: 1px solid var(--line);
  margin: 36px 0;
}

/* ===== 标签区 ===== */
.tag-list {
  max-width: 720px;
  margin: 0 auto;
  padding: 16px 0 8px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.tag {
  display: inline-flex;
  align-items: center;
  padding: 5px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  color: var(--ink-soft);
  background: var(--surface);
  letter-spacing: .04em;
  transition: border-color .25s var(--ease), color .25s var(--ease);
}
.tag:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ===== 文末入口 ===== */
.article-actions {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 0 48px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  border-bottom: 1px solid var(--line);
}
.btn-solid {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 28px;
  background: var(--accent);
  color: #fff;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  transition: background .25s var(--ease), transform .25s var(--ease), box-shadow .25s var(--ease);
  box-shadow: 0 1px 2px rgba(20,22,18,.15);
}
.btn-solid:hover {
  background: var(--accent-deep);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(31,64,52,.2);
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 28px;
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  transition: border-color .25s var(--ease), background .25s var(--ease), color .25s var(--ease);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(46,91,74,.04);
}

/* ===== 空态 ===== */
.empty-state {
  max-width: 720px;
  margin: 0 auto;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 64px 32px;
  text-align: center;
}
.empty-icon {
  width: 48px; height: 48px;
  border: 2px solid var(--line);
  border-radius: 50%;
  margin: 0 auto 20px;
  position: relative;
}
.empty-icon::before,
.empty-icon::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 18px; height: 2px;
  background: var(--line);
  border-radius: 2px;
}
.empty-icon::before { transform: translate(-50%,-50%) rotate(45deg); }
.empty-icon::after { transform: translate(-50%,-50%) rotate(-45deg); }
.empty-state h2 {
  font-family: var(--font-serif);
  font-size: 24px;
  color: var(--ink);
  margin-bottom: 12px;
}
.empty-state p {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 28px;
}

/* ===== 相关推荐 ===== */
.related-section {
  background: var(--bg);
  padding: 64px 0 72px;
}
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}
.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}
.section-head h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.375rem, 2.4vw, 1.875rem);
  font-weight: 700;
  color: var(--ink);
  letter-spacing: .01em;
  margin: 0;
}
.link-more {
  font-size: 14px;
  color: var(--accent);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap .25s var(--ease);
  white-space: nowrap;
}
.link-more:hover { gap: 8px; color: var(--accent-deep); }
.link-more::after {
  content: '→';
  font-size: 14px;
}
.scroll-cards {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  padding: 8px 4px 16px;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
}
.scroll-cards::-webkit-scrollbar { display: none; }
.related-card {
  flex-shrink: 0;
  width: clamp(220px, 26vw, 300px);
  scroll-snap-align: start;
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: box-shadow .25s var(--ease), border-color .25s var(--ease);
  border: 1px solid transparent;
}
.related-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: rgba(46,91,74,.4);
}
.related-cover {
  position: relative;
  height: 150px;
  overflow: hidden;
  background: var(--surface-2);
}
.related-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s var(--ease);
}
.related-card:hover .related-cover img {
  transform: scale(1.05);
}
.badge {
  position: absolute;
  top: 10px; left: 10px;
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  letter-spacing: .04em;
  z-index: 2;
}
.related-body {
  padding: 16px;
}
.related-body h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.45;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-body p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== CTA 区 ===== */
.article-cta {
  background: var(--dark-1);
  padding: 80px 24px;
  position: relative;
  overflow: hidden;
}
.article-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
  opacity: .14;
}
.cta-inner {
  max-width: 640px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
  text-align: center;
}
.cta-inner h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 2.4vw, 2.125rem);
  color: var(--on-dark);
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.3;
}
.cta-inner > p {
  color: rgba(255,255,255,.62);
  font-size: 15px;
  margin-bottom: 32px;
}
.cta-form {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}
.cta-form input[type="email"] {
  flex: 1;
  min-width: 220px;
  height: 48px;
  padding: 0 20px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: var(--radius);
  color: #fff;
  font-size: 14px;
  outline: none;
  transition: border-color .25s var(--ease), background .25s var(--ease);
}
.cta-form input[type="email"]::placeholder { color: rgba(255,255,255,.4); }
.cta-form input[type="email"]:focus {
  border-color: var(--accent);
  background: rgba(255,255,255,.1);
}
.cta-form .btn-submit {
  height: 48px;
  padding: 0 32px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: background .25s var(--ease), transform .25s var(--ease), box-shadow .25s var(--ease);
  box-shadow: 0 2px 8px rgba(31,64,52,.3);
}
.cta-form .btn-submit:hover {
  background: var(--accent-deep);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(31,64,52,.35);
}
.form-tip {
  min-height: 24px;
  margin-top: 16px;
  font-size: 13px;
  color: rgba(255,255,255,.5);
}
.form-tip.success { color: #7BB39A; }
.form-tip.error { color: #E07A6A; }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--dark-1);
  padding: 64px 0 32px;
  color: rgba(255,255,255,.6);
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-logo .logo-text {
  font-size: 20px;
}
.footer-desc {
  font-size: 13px;
  line-height: 1.8;
  color: rgba(255,255,255,.48);
  max-width: 300px;
}
.footer-title {
  font-size: 14px;
  font-weight: 600;
  color: rgba(255,255,255,.85);
  margin-bottom: 16px;
  letter-spacing: .04em;
}
.footer-nav-list {
  list-style: none;
  padding: 0;
}
.footer-nav-list li {
  margin-bottom: 10px;
}
.footer-nav-list a {
  font-size: 13px;
  color: rgba(255,255,255,.5);
  transition: color .25s var(--ease), padding-left .25s var(--ease);
}
.footer-nav-list a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-contact p {
  font-size: 13px;
  color: rgba(255,255,255,.5);
  line-height: 1.8;
  margin-bottom: 4px;
}
.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px 24px 0;
  border-top: 1px solid rgba(255,255,255,.08);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 12px;
  color: rgba(255,255,255,.4);
}

/* ===== 响应式 ===== */
@media (max-width: 991px) {
  .app-sidebar {
    transform: translateX(-100%);
    transition: transform .25s var(--ease);
    box-shadow: 0 0 40px rgba(0,0,0,.3);
  }
  .app-sidebar.open { transform: translateX(0); }
  .app-main { margin-left: 0; }
  .mobile-topbar {
    display: flex;
    height: 56px;
    background: var(--dark-1);
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    position: sticky;
    top: 0;
    z-index: 120;
  }
  .mobile-logo {
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .mobile-logo .logo-text {
    color: var(--on-dark);
    font-family: var(--font-serif);
    font-size: 18px;
    font-weight: 700;
    letter-spacing: .06em;
  }
  .hamburger {
    width: 40px; height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,.8);
    border-radius: var(--radius);
    transition: background .25s var(--ease), color .25s var(--ease);
  }
  .hamburger:hover {
    background: rgba(255,255,255,.08);
    color: #fff;
  }
  .sidebar-close {
    display: flex;
    width: 32px; height: 32px;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,.6);
    border-radius: 6px;
    margin-left: auto;
    transition: background .25s var(--ease), color .25s var(--ease);
  }
  .sidebar-close:hover {
    background: rgba(255,255,255,.08);
    color: #fff;
  }
  .sidebar-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.4);
    z-index: 150;
    opacity: 0;
    visibility: hidden;
    transition: opacity .25s var(--ease), visibility .25s var(--ease);
  }
  .sidebar-backdrop.show {
    opacity: 1;
    visibility: visible;
  }
  .sidebar-header {
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .sidebar-tagline { margin-left: 18px; }
}

@media (max-width: 767px) {
  .article-hero { min-height: 280px; }
  .article-hero-content { padding-top: 48px; padding-bottom: 36px; }
  .article-body-wrap { padding: 36px 16px 16px; }
  .article-content { font-size: 15px; line-height: 1.85; }
  .article-actions { padding-bottom: 36px; }
  .related-section { padding: 48px 0 56px; }
  .container { padding: 0 16px; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .article-cta { padding: 56px 16px; }
  .cta-form { flex-direction: column; }
  .cta-form input[type="email"] { width: 100%; min-width: 0; }
  .cta-form .btn-submit { width: 100%; }
}

@media (max-width: 520px) {
  .article-hero-content { padding-left: 16px; padding-right: 16px; }
  .breadcrumb { font-size: 12px; }
  .breadcrumb .crumb-current { max-width: 180px; }
  .article-meta { font-size: 12px; }
  .btn-solid, .btn-ghost { flex: 1; min-width: 0; }
  .related-card { width: 230px; }
}

/* roulang page: category2 */
:root {
            --bg: #F3F0E9;
            --surface: #FFFFFF;
            --surface-2: #EBE7DE;
            --ink: #171812;
            --ink-soft: #3F4239;
            --muted: #73776D;
            --line: #E3DFD4;
            --accent: #2E5B4A;
            --accent-deep: #1F4034;
            --accent-soft: #E2ECE5;
            --dark-1: #141512;
            --dark-2: #1D1F1A;
            --on-dark: #F3F0E9;
            --danger: #B3382C;
            --success: #2F6B4F;
            --font-serif: 'Noto Serif SC', 'Songti SC', 'SimSun', serif;
            --font-sans: -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-display: 'Space Grotesk', 'Inter', sans-serif;
            --radius: 8px;
            --radius-card: 10px;
            --shadow-sm: 0 1px 2px rgba(20,22,18,.04), 0 8px 24px rgba(20,22,18,.06);
            --shadow-md: 0 2px 4px rgba(20,22,18,.05), 0 16px 32px rgba(20,22,18,.10);
            --transition: all .25s cubic-bezier(.2,.6,.2,1);
            --sidebar-w: 240px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--ink);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        input {
            font-family: inherit;
        }
        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4 {
            font-family: var(--font-serif);
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: .01em;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ============ App Shell ============ */
        .sidebar {
            position: fixed;
            left: 0;
            top: 0;
            bottom: 0;
            width: var(--sidebar-w);
            background: var(--dark-1);
            z-index: 100;
            display: flex;
            flex-direction: column;
            padding: 0 0 20px;
            transition: transform .3s cubic-bezier(.2, .6, .2, 1);
            overflow-y: auto;
        }
        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            height: 64px;
            padding: 0 20px;
            border-bottom: 1px solid rgba(255, 255, 255, .06);
            flex-shrink: 0;
        }
        .logo-mark {
            width: 10px;
            height: 10px;
            background: var(--accent);
            border-radius: 2px;
            flex-shrink: 0;
        }
        .logo-text {
            font-family: var(--font-serif);
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            letter-spacing: .04em;
            line-height: 1;
        }
        .sidebar-slogan {
            font-size: 12px;
            color: rgba(255, 255, 255, .42);
            padding: 12px 20px 0;
            letter-spacing: .15em;
            flex-shrink: 0;
        }
        .sidebar-nav {
            margin-top: 20px;
            flex: 1;
        }
        .nav-link {
            display: flex;
            align-items: center;
            height: 44px;
            padding: 0 20px;
            font-size: 15px;
            color: rgba(255, 255, 255, .68);
            border-left: 3px solid transparent;
            transition: var(--transition);
            letter-spacing: .02em;
        }
        .nav-link:hover {
            color: rgba(255, 255, 255, .92);
            background: rgba(255, 255, 255, .04);
        }
        .nav-link.active {
            color: #fff;
            border-left-color: var(--accent);
            background: rgba(255, 255, 255, .03);
            font-weight: 600;
        }
        .nav-link:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: -2px;
            border-radius: 4px;
        }
        .sidebar-footer {
            padding: 16px 16px 0;
            border-top: 1px solid rgba(255, 255, 255, .06);
            flex-shrink: 0;
        }
        .sidebar-contact {
            display: block;
            text-align: center;
            padding: 10px 14px;
            background: var(--accent);
            color: #fff;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
        }
        .sidebar-contact:hover {
            background: var(--accent-deep);
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, .4);
            z-index: 90;
        }
        .sidebar-overlay.active {
            display: block;
        }

        .main-area {
            margin-left: var(--sidebar-w);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ============ Mobile Header ============ */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: var(--dark-1);
            z-index: 95;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, .18);
        }
        .mobile-brand {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-brand .logo-text {
            font-size: 20px;
        }
        .menu-toggle {
            display: flex;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
        }
        .menu-toggle span {
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: var(--transition);
        }
        .menu-toggle:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .menu-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .menu-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .menu-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ============ Page Hero ============ */
        .page-hero {
            position: relative;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            padding: 110px 0 90px;
            color: #fff;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(20, 21, 18, .82) 0%, rgba(20, 21, 18, .52) 60%, rgba(20, 21, 18, .15) 100%);
        }
        .page-hero::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 40px;
            background: linear-gradient(180deg, transparent, rgba(243, 240, 233, 1));
            z-index: 1;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .breadcrumb {
            font-size: 13px;
            color: rgba(255, 255, 255, .7);
            margin-bottom: 18px;
            letter-spacing: .04em;
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, .8);
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb .sep {
            opacity: .5;
        }
        .page-hero h1 {
            font-size: clamp(2rem, 4.5vw, 3.2rem);
            margin-bottom: 14px;
            letter-spacing: .02em;
        }
        .page-hero .hero-desc {
            font-size: 17px;
            color: rgba(255, 255, 255, .82);
            max-width: 580px;
            line-height: 1.7;
            margin-bottom: 28px;
        }
        .hero-meta {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            font-size: 13px;
            color: rgba(255, 255, 255, .6);
            letter-spacing: .05em;
        }
        .hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .hero-meta span i {
            width: 4px;
            height: 4px;
            background: var(--accent);
            border-radius: 50%;
            display: inline-block;
        }

        /* ============ Category Intro ============ */
        .category-intro {
            padding: 60px 0 8px;
        }
        .category-intro .intro-text {
            font-size: 17px;
            line-height: 1.9;
            color: var(--ink-soft);
            max-width: 840px;
            letter-spacing: .02em;
        }
        .category-intro .intro-text strong {
            color: var(--ink);
            font-weight: 600;
        }

        /* ============ Tag Filter ============ */
        .tag-filter {
            padding: 28px 0 8px;
        }
        .tag-filter .tags-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            border: 1px solid var(--line);
            border-radius: 999px;
            font-size: 14px;
            color: var(--ink-soft);
            background: var(--surface);
            cursor: pointer;
            transition: var(--transition);
            letter-spacing: .02em;
        }
        .tag:hover {
            border-color: var(--accent);
            color: var(--accent);
        }
        .tag.active {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
            font-weight: 500;
        }
        .tag:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* ============ Content Grid ============ */
        .content-grid-section {
            padding: 40px 0 80px;
        }
        .grid-layout {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 24px;
        }
        .feature-card {
            grid-column: span 8;
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            background: var(--surface);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            min-height: 380px;
        }
        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .feature-card .card-img {
            height: 220px;
            overflow: hidden;
            position: relative;
        }
        .feature-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .feature-card:hover .card-img img {
            transform: scale(1.05);
        }
        .card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--accent);
            color: #fff;
            font-size: 12px;
            padding: 4px 12px;
            border-radius: 999px;
            letter-spacing: .03em;
            z-index: 2;
            font-weight: 500;
        }
        .card-ribbon {
            position: absolute;
            top: 14px;
            right: 14px;
            background: var(--dark-1);
            color: rgba(255, 255, 255, .85);
            font-size: 11px;
            padding: 4px 10px;
            border-radius: 999px;
            letter-spacing: .05em;
            z-index: 2;
            font-weight: 500;
            opacity: .85;
        }
        .card-body {
            padding: 20px 22px 22px;
        }
        .feature-card .card-body {
            padding: 22px 26px 26px;
        }
        .card-body h3 {
            font-size: 18px;
            margin-bottom: 8px;
            color: var(--ink);
            line-height: 1.4;
        }
        .feature-card .card-body h3 {
            font-size: 20px;
        }
        .card-body p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.6;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .feature-card .card-body p {
            -webkit-line-clamp: 3;
            font-size: 15px;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--muted);
        }
        .card-meta .dot {
            width: 4px;
            height: 4px;
            background: var(--accent);
            border-radius: 50%;
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 14px;
            color: var(--accent);
            font-weight: 500;
            margin-top: 14px;
            transition: var(--transition);
        }
        .card-link:hover {
            color: var(--accent-deep);
            gap: 8px;
        }

        .regular-card {
            grid-column: span 4;
            border-radius: var(--radius-card);
            overflow: hidden;
            background: var(--surface);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .regular-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .regular-card .card-img {
            height: 150px;
            overflow: hidden;
            position: relative;
        }
        .regular-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .regular-card:hover .card-img img {
            transform: scale(1.05);
        }
        .regular-card .card-body {
            padding: 16px 18px 18px;
        }
        .regular-card .card-body h3 {
            font-size: 16px;
            margin-bottom: 6px;
        }
        .regular-card .card-body p {
            font-size: 13px;
            margin-bottom: 10px;
        }

        .feature-card:nth-of-type(4) {
            grid-column: 5 / 13;
        }
        .regular-card:nth-of-type(3) {
            grid-column: 1 / 5;
        }
        .regular-card:nth-of-type(5),
        .regular-card:nth-of-type(6) {
            grid-column: span 6;
        }

        /* ============ Empty State ============ */
        .empty-state {
            border: 1px dashed var(--line);
            border-radius: var(--radius);
            padding: 48px 24px;
            text-align: center;
            margin-top: 32px;
            color: var(--muted);
            background: rgba(255, 255, 255, .4);
        }
        .empty-state .empty-icon {
            font-size: 32px;
            margin-bottom: 12px;
            display: block;
            color: var(--line);
        }
        .empty-state p:first-of-type {
            font-size: 16px;
            font-weight: 600;
            color: var(--ink-soft);
            margin-bottom: 4px;
        }
        .empty-state p:last-of-type {
            font-size: 14px;
        }

        /* ============ Values Section ============ */
        .values-section {
            background: var(--surface-2);
            padding: 80px 0;
        }
        .section-head {
            margin-bottom: 40px;
        }
        .section-head .eyebrow {
            font-size: 13px;
            color: var(--accent);
            letter-spacing: .1em;
            text-transform: uppercase;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .section-head h2 {
            font-size: clamp(1.5rem, 2.5vw, 2.1rem);
            color: var(--ink);
        }
        .value-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .value-item {
            background: var(--surface);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            border: 1px solid transparent;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .value-item:hover {
            border-color: rgba(46, 91, 74, .25);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .value-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--accent-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 20px;
            color: var(--accent);
        }
        .value-item h3 {
            font-size: 17px;
            margin-bottom: 10px;
            color: var(--ink);
        }
        .value-item p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
        }

        /* ============ Scenes Section ============ */
        .scenes-section {
            padding: 80px 0;
            background: var(--bg);
        }
        .scenes-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .scene-item {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 28px;
            display: flex;
            gap: 16px;
            border-left: 3px solid var(--accent);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .scene-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(3px);
        }
        .scene-num {
            font-family: var(--font-display);
            font-size: 22px;
            font-weight: 700;
            color: var(--accent);
            opacity: .6;
            flex-shrink: 0;
            line-height: 1.2;
        }
        .scene-item h3 {
            font-size: 16px;
            margin-bottom: 6px;
            color: var(--ink);
        }
        .scene-item p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.6;
        }

        /* ============ Process Section ============ */
        .process-section {
            background: var(--dark-1);
            color: var(--on-dark);
            padding: 80px 0;
        }
        .process-section .section-head h2 {
            color: #fff;
        }
        .process-section .section-head .eyebrow {
            color: var(--accent);
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 0;
            counter-reset: process;
        }
        .process-step {
            padding: 32px 28px;
            position: relative;
            border-right: 1px solid rgba(255, 255, 255, .08);
        }
        .process-step:last-child {
            border-right: none;
        }
        .process-step::before {
            counter-increment: process;
            content: '0' counter(process);
            font-family: var(--font-display);
            font-size: 34px;
            font-weight: 700;
            color: var(--accent);
            display: block;
            margin-bottom: 16px;
            letter-spacing: .02em;
        }
        .process-step h3 {
            font-size: 17px;
            color: #fff;
            margin-bottom: 10px;
        }
        .process-step p {
            font-size: 14px;
            color: rgba(255, 255, 255, .6);
            line-height: 1.7;
        }

        /* ============ FAQ ============ */
        .faq-section {
            padding: 80px 0;
        }
        .faq-list {
            max-width: 820px;
        }
        .faq-item {
            border-bottom: 1px solid var(--line);
        }
        .faq-item:first-child {
            border-top: 1px solid var(--line);
        }
        .faq-q {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 22px 8px;
            font-size: 17px;
            font-weight: 600;
            color: var(--ink);
            cursor: pointer;
            transition: var(--transition);
            font-family: var(--font-serif);
            letter-spacing: .01em;
        }
        .faq-q:hover {
            color: var(--accent);
        }
        .faq-q:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .faq-icon {
            width: 24px;
            height: 24px;
            border: 1px solid var(--line);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 400;
            color: var(--accent);
            transition: transform .3s ease;
            flex-shrink: 0;
            font-family: var(--font-display);
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }
        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }
        .faq-a-inner {
            padding: 0 8px 22px;
            font-size: 15px;
            color: var(--muted);
            line-height: 1.75;
        }

        /* ============ CTA Section ============ */
        .cta-section {
            background: var(--dark-2);
            padding: 80px 0;
            margin-top: 40px;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
            opacity: .14;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 720px;
        }
        .cta-section h2 {
            font-size: clamp(1.6rem, 2.8vw, 2.2rem);
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section .cta-desc {
            color: rgba(255, 255, 255, .7);
            font-size: 15px;
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .subscribe-form {
            display: flex;
            gap: 12px;
            max-width: 460px;
            margin: 0 auto 12px;
        }
        .subscribe-form input[type="email"] {
            flex: 1;
            height: 48px;
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .25);
            border-radius: 8px;
            padding: 0 16px;
            font-size: 15px;
            color: #fff;
            outline: none;
            transition: var(--transition);
        }
        .subscribe-form input[type="email"]::placeholder {
            color: rgba(255, 255, 255, .4);
        }
        .subscribe-form input[type="email"]:focus {
            border-color: var(--accent);
            background: rgba(255, 255, 255, .09);
        }
        .subscribe-form button {
            height: 48px;
            padding: 0 24px;
            background: var(--accent);
            color: #fff;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            white-space: nowrap;
        }
        .subscribe-form button:hover {
            background: var(--accent-deep);
        }
        .subscribe-form button:active {
            transform: scale(.97);
        }
        .subscribe-form button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        .form-message {
            font-size: 13px;
            min-height: 20px;
            margin-top: 8px;
            max-width: 460px;
            margin-left: auto;
            margin-right: auto;
        }
        .form-message.success {
            color: var(--success);
        }
        .form-message.error {
            color: var(--danger);
        }
        .cta-links {
            margin-top: 28px;
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .link-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 9px 22px;
            border: 1px solid rgba(255, 255, 255, .35);
            border-radius: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, .85);
            transition: var(--transition);
        }
        .link-btn:hover {
            background: rgba(255, 255, 255, .08);
            border-color: rgba(255, 255, 255, .6);
            color: #fff;
        }
        .link-btn:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: var(--dark-1);
            color: rgba(255, 255, 255, .65);
            padding: 64px 0 0;
            margin-top: auto;
        }
        .footer-inner {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px 40px;
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .footer-logo .logo-text {
            font-size: 20px;
            color: #fff;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, .5);
            max-width: 300px;
        }
        .footer-title {
            font-size: 14px;
            font-weight: 600;
            color: rgba(255, 255, 255, .8);
            margin-bottom: 14px;
            letter-spacing: .04em;
        }
        .footer-nav-list li {
            margin-bottom: 8px;
        }
        .footer-nav-list a {
            font-size: 14px;
            color: rgba(255, 255, 255, .5);
            transition: var(--transition);
        }
        .footer-nav-list a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-nav-list a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .footer-contact p {
            font-size: 14px;
            color: rgba(255, 255, 255, .5);
            margin-bottom: 6px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .07);
            padding: 20px 0;
            text-align: center;
            display: flex;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
            font-size: 13px;
            color: rgba(255, 255, 255, .4);
        }

        /* ============ Reveal Animation ============ */
        .reveal {
            opacity: 0;
            transform: translateY(12px);
            transition: opacity .5s ease, transform .5s ease;
        }
        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ============ Responsive ============ */
        @media (max-width: 1023px) {
            .value-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .feature-card {
                grid-column: span 12 !important;
            }
            .regular-card {
                grid-column: span 6 !important;
            }
            .regular-card:nth-of-type(5),
            .regular-card:nth-of-type(6) {
                grid-column: span 6 !important;
            }
            .regular-card:nth-of-type(3) {
                grid-column: 1 / 7 !important;
            }
            .feature-card:nth-of-type(4) {
                grid-column: 1 / 13 !important;
            }
        }

        @media (max-width: 767px) {
            .sidebar {
                transform: translateX(-100%);
                width: 260px;
            }
            .sidebar.open {
                transform: translateX(0);
                box-shadow: 4px 0 24px rgba(0, 0, 0, .3);
            }
            .sidebar-overlay.active {
                display: block;
            }
            .main-area {
                margin-left: 0;
                padding-top: 56px;
            }
            .mobile-header {
                display: flex;
            }

            .page-hero {
                padding: 70px 0 60px;
            }
            .page-hero .hero-desc {
                font-size: 15px;
            }
            .hero-meta {
                gap: 12px;
                font-size: 12px;
            }
            .category-intro {
                padding: 36px 0 4px;
            }
            .category-intro .intro-text {
                font-size: 15px;
            }
            .content-grid-section {
                padding: 24px 0 56px;
            }
            .grid-layout {
                gap: 16px;
            }
            .feature-card,
            .regular-card {
                grid-column: span 12 !important;
            }
            .regular-card .card-img {
                height: 180px;
            }

            .value-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .values-section,
            .scenes-section,
            .process-section,
            .faq-section,
            .cta-section {
                padding: 56px 0;
            }
            .scenes-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .process-grid {
                grid-template-columns: 1fr;
                gap: 0;
            }
            .process-step {
                border-right: none;
                border-bottom: 1px solid rgba(255, 255, 255, .08);
                padding: 28px 20px;
            }
            .process-step:last-child {
                border-bottom: none;
            }
            .subscribe-form {
                flex-direction: column;
                gap: 10px;
            }
            .subscribe-form button {
                width: 100%;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-bottom: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                align-items: center;
                padding-left: 16px;
                padding-right: 16px;
            }
            .cta-links {
                flex-direction: column;
                align-items: center;
                gap: 10px;
            }
            .link-btn {
                width: 100%;
                max-width: 280px;
            }
            .container {
                padding: 0 16px;
            }
        }

        @media (max-width: 520px) {
            .regular-card .card-img {
                height: 160px;
            }
            .feature-card .card-img {
                height: 190px;
            }
            .card-body {
                padding: 16px;
            }
            .feature-card .card-body {
                padding: 18px;
            }
            .tag {
                font-size: 13px;
                padding: 5px 12px;
            }
            .value-item {
                padding: 24px 20px;
            }
            .scene-item {
                padding: 20px;
            }
            .section-head {
                margin-bottom: 28px;
            }
            .faq-q {
                font-size: 15px;
                padding: 18px 4px;
            }
        }

/* roulang page: category3 */
:root {
  --bg: #F3F0E9;
  --surface: #FFFFFF;
  --surface-2: #EBE7DE;
  --ink: #171812;
  --ink-soft: #3F4239;
  --muted: #73776D;
  --line: #E3DFD4;
  --accent: #2E5B4A;
  --accent-deep: #1F4034;
  --accent-soft: #E2ECE5;
  --dark-1: #141512;
  --dark-2: #1D1F1A;
  --on-dark: #F3F0E9;
  --danger: #B3382C;
  --success: #2F6B4F;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow-default: 0 1px 2px rgba(20,22,18,.04), 0 8px 24px rgba(20,22,18,.06);
  --shadow-hover: 0 2px 4px rgba(20,22,18,.05), 0 16px 32px rgba(20,22,18,.10);
  --ease: cubic-bezier(.2,.6,.2,1);
  --font-serif: "Noto Serif SC", "Songti SC", SimSun, serif;
  --font-sans: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-num: "Space Grotesk", "Inter", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
  font-size: 16px;
  letter-spacing: .02em;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color .25s var(--ease);
}

button {
  border: none;
  background: none;
  cursor: pointer;
  font: inherit;
}

input {
  font: inherit;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Sidebar (Desktop) ===== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 240px;
  height: 100vh;
  background: var(--dark-1);
  color: var(--on-dark);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: transform .35s var(--ease);
}

.sidebar-brand {
  height: 64px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 20px;
  border-bottom: 1px solid rgba(255,255,255,.06);
}

.logo-mark {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 2px;
  flex-shrink: 0;
}

.logo-text {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--on-dark);
}

.sidebar-tagline {
  padding: 14px 20px 6px;
  font-size: 12px;
  color: rgba(255,255,255,.42);
  letter-spacing: .04em;
  line-height: 1.5;
}

.sidebar-nav {
  flex: 1;
  padding: 18px 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-link {
  display: flex;
  align-items: center;
  height: 44px;
  padding: 0 20px;
  font-size: 15px;
  color: rgba(255,255,255,.65);
  border-left: 3px solid transparent;
  transition: all .25s var(--ease);
}

.nav-link:hover {
  background: rgba(255,255,255,.04);
  color: rgba(255,255,255,.92);
}

.nav-link.active {
  color: #fff;
  border-left-color: var(--accent);
  background: linear-gradient(90deg, rgba(46,91,74,.18) 0%, transparent 70%);
}

.sidebar-footer {
  padding: 16px 20px 20px;
  border-top: 1px solid rgba(255,255,255,.06);
}

.sidebar-contact {
  display: block;
  text-align: center;
  height: 40px;
  line-height: 40px;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  transition: background .25s var(--ease), box-shadow .25s var(--ease);
}

.sidebar-contact:hover {
  background: var(--accent-deep);
  box-shadow: 0 6px 16px rgba(46,91,74,.28);
}

/* ===== Mobile Header ===== */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: var(--dark-1);
  color: var(--on-dark);
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 90;
}

.mobile-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.mobile-brand .logo-text {
  font-size: 20px;
}

.menu-btn {
  width: 40px;
  height: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: 8px;
}

.menu-btn span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--on-dark);
  border-radius: 2px;
  transition: all .3s var(--ease);
}

.menu-btn:hover span {
  background: var(--accent);
}

/* ===== Drawer ===== */
.drawer {
  position: fixed;
  top: 0;
  left: 0;
  width: 260px;
  height: 100vh;
  background: var(--dark-1);
  z-index: 120;
  transform: translateX(-100%);
  transition: transform .35s var(--ease);
  display: flex;
  flex-direction: column;
}

.drawer.open {
  transform: translateX(0);
}

.drawer-head {
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  border-bottom: 1px solid rgba(255,255,255,.06);
}

.drawer-close {
  width: 36px;
  height: 36px;
  color: rgba(255,255,255,.75);
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  transition: background .25s var(--ease), color .25s var(--ease);
}

.drawer-close:hover {
  background: rgba(255,255,255,.06);
  color: #fff;
}

.drawer-nav {
  flex: 1;
  padding: 24px 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.drawer-nav .nav-link {
  padding: 0 20px;
}

.drawer-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,.4);
  z-index: 110;
  opacity: 0;
  pointer-events: none;
  transition: opacity .35s var(--ease);
}

.drawer-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

/* ===== Main Wrapper ===== */
.main-wrapper {
  margin-left: 240px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

/* ===== Page Hero ===== */
.page-hero {
  position: relative;
  min-height: 340px;
  display: flex;
  align-items: flex-end;
  background-color: var(--dark-1);
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(20,21,18,.92) 18%, rgba(20,21,18,.55) 55%, rgba(20,21,18,.22) 100%);
}

.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, var(--bg) 0%, transparent 60px);
  pointer-events: none;
}

.page-hero-content {
  position: relative;
  z-index: 2;
  padding: 56px 24px 64px;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255,255,255,.58);
  margin-bottom: 18px;
}

.breadcrumb a {
  color: rgba(255,255,255,.78);
}

.breadcrumb a:hover {
  color: #fff;
}

.breadcrumb-sep {
  color: rgba(255,255,255,.4);
}

.breadcrumb-current {
  color: rgba(255,255,255,.9);
}

.page-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.15;
  letter-spacing: .04em;
  margin-bottom: 10px;
}

.page-hero-subtitle {
  font-size: 18px;
  color: rgba(255,255,255,.78);
  letter-spacing: .04em;
}

/* ===== Category Intro ===== */
.category-intro {
  padding: 48px 0 8px;
}

.intro-block {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 36px 40px;
  box-shadow: var(--shadow-default);
}

.intro-text {
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink-soft);
  max-width: 980px;
}

.intro-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-size: 13px;
  font-weight: 500;
}

.meta-chip::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

/* ===== Tag Filter ===== */
.tag-filter {
  padding: 32px 24px 0;
}

.tag-filter-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-chip {
  height: 34px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-soft);
  font-size: 14px;
  transition: all .25s var(--ease);
}

.tag-chip:hover {
  border-color: var(--accent);
  color: var(--accent-deep);
  background: var(--accent-soft);
}

.tag-chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 500;
}

/* ===== Featured Section ===== */
.featured-section {
  padding: 56px 0 8px;
}

.featured-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
}

.featured-main {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 400px;
  background: var(--surface-2);
  display: flex;
  align-items: flex-end;
  box-shadow: var(--shadow-default);
  transition: box-shadow .3s var(--ease);
}

.featured-main:hover {
  box-shadow: var(--shadow-hover);
}

.featured-main-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s var(--ease);
}

.featured-main:hover .featured-main-img {
  transform: scale(1.04);
}

.featured-main-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15,17,14,.95) 0%, rgba(15,17,14,.35) 48%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 32px 28px;
}

.featured-main .badge {
  align-self: flex-start;
  margin-bottom: 12px;
}

.badge {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 12px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .03em;
}

.featured-main-title {
  font-family: var(--font-serif);
  font-size: 24px;
  color: #fff;
  line-height: 1.4;
  margin-bottom: 8px;
  letter-spacing: .02em;
}

.featured-main-desc {
  font-size: 14px;
  color: rgba(255,255,255,.75);
  line-height: 1.6;
  margin-bottom: 14px;
}

.featured-main-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: #fff;
  font-weight: 500;
  border-bottom: 1px solid rgba(255,255,255,.5);
  padding-bottom: 2px;
  width: fit-content;
  transition: all .25s var(--ease);
}

.featured-main-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.featured-side {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.featured-side-item {
  flex: 1;
  display: flex;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-default);
  transition: box-shadow .3s var(--ease), transform .3s var(--ease);
}

.featured-side-item:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.side-item-cover {
  width: 96px;
  flex-shrink: 0;
}

.side-item-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.side-item-body {
  padding: 16px 16px 16px 14px;
  display: flex;
  flex-direction: column;
}

.side-item-tag {
  font-size: 12px;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 4px;
}

.side-item-title {
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink);
  margin-bottom: 6px;
}

.side-item-desc {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== Reading Grid ===== */
.reading-grid-section {
  padding: 80px 0 16px;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 20px;
  margin-bottom: 36px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 2.5vw, 2.25rem);
  font-weight: 700;
  color: var(--ink);
  line-height: 1.2;
  letter-spacing: .02em;
}

.section-note {
  font-size: 13px;
  color: var(--muted);
  white-space: nowrap;
}

.reading-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.grid-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-default);
  transition: box-shadow .3s var(--ease), transform .3s var(--ease);
}

.grid-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.grid-card-large {
  grid-column: span 2;
  display: grid;
  grid-template-columns: 3fr 2fr;
}

.grid-card-img {
  position: relative;
  overflow: hidden;
  background: var(--surface-2);
  aspect-ratio: 16 / 9;
}

.grid-card-large .grid-card-img {
  aspect-ratio: auto;
  min-height: 260px;
}

.grid-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s var(--ease);
}

.grid-card:hover .grid-card-img img {
  transform: scale(1.05);
}

.grid-card-body {
  padding: 22px 22px 26px;
  display: flex;
  flex-direction: column;
}

.grid-card-tag {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  height: 24px;
  padding: 0 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-size: 12px;
  font-weight: 500;
  margin-bottom: 12px;
}

.grid-card h3 {
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.5;
  color: var(--ink);
  margin-bottom: 8px;
  letter-spacing: .01em;
}

.grid-card-large h3 {
  font-size: 22px;
  line-height: 1.4;
}

.grid-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.grid-card-large p {
  -webkit-line-clamp: 3;
}

.grid-card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: auto;
  padding-top: 16px;
  font-size: 13px;
  color: var(--muted);
}

.grid-card-meta .dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--accent);
}

/* ===== Empty State ===== */
.empty-state-wrap {
  padding: 56px 24px 0;
}

.empty-state {
  border: 1px dashed var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: 40px 32px;
  text-align: center;
}

.empty-state-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 14px;
  border-radius: 50%;
  background: var(--surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--muted);
}

.empty-state-title {
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.empty-state-sub {
  font-size: 14px;
  color: var(--muted);
}

.empty-state-hidden {
  display: none;
}

/* ===== FAQ ===== */
.faq-section {
  padding: 80px 24px 24px;
}

.faq-list {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--line);
}

.faq-item:first-of-type {
  border-top: 1px solid var(--line);
}

.faq-question {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  transition: color .25s var(--ease);
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question:hover {
  color: var(--accent);
}

.faq-question::after {
  content: "+";
  width: 28px;
  height: 28px;
  border: 1px solid var(--line);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 400;
  color: var(--muted);
  flex-shrink: 0;
  transition: all .3s var(--ease);
}

.faq-item[open] .faq-question::after {
  transform: rotate(45deg);
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.faq-answer {
  padding: 0 8px 22px;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.85;
  max-width: 720px;
}

/* ===== CTA ===== */
.cta-section {
  padding: 48px 24px 80px;
}

.cta-block {
  position: relative;
  border-radius: var(--radius-lg);
  background-color: var(--dark-1);
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  overflow: hidden;
  padding: 64px 48px;
  text-align: center;
}

.cta-block::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(20,21,18,.9) 30%, rgba(20,21,18,.68) 100%);
}

.cta-content {
  position: relative;
  z-index: 2;
  max-width: 640px;
  margin: 0 auto;
}

.cta-content h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 2.8vw, 2.2rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: .03em;
}

.cta-content p {
  font-size: 15px;
  color: rgba(255,255,255,.72);
  line-height: 1.8;
  margin-bottom: 28px;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 46px;
  padding: 0 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .03em;
  transition: all .25s var(--ease);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-deep);
  box-shadow: 0 6px 20px rgba(46,91,74,.35);
  transform: translateY(-1px);
}

.btn-outline {
  border: 1px solid rgba(255,255,255,.5);
  color: #fff;
  background: rgba(255,255,255,.03);
}

.btn-outline:hover {
  background: rgba(255,255,255,.1);
  border-color: #fff;
  transform: translateY(-1px);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--dark-1);
  color: var(--on-dark);
  padding: 64px 0 32px;
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.footer-logo .logo-mark {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 2px;
}

.footer-logo .logo-text {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--on-dark);
}

.footer-desc {
  font-size: 14px;
  color: rgba(255,255,255,.55);
  line-height: 1.8;
  max-width: 360px;
}

.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: rgba(255,255,255,.9);
  margin-bottom: 14px;
}

.footer-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-nav-list a {
  font-size: 14px;
  color: rgba(255,255,255,.55);
  line-height: 1.6;
  transition: color .25s var(--ease), padding-left .25s var(--ease);
}

.footer-nav-list a:hover {
  color: var(--accent);
  padding-left: 4px;
}

.footer-contact p {
  font-size: 14px;
  color: rgba(255,255,255,.45);
  line-height: 2;
  word-break: break-all;
}

.footer-bottom {
  max-width: 1280px;
  margin: 48px auto 0;
  padding: 24px 24px 0;
  border-top: 1px solid rgba(255,255,255,.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 13px;
  color: rgba(255,255,255,.4);
}

/* ===== Reveal Animation ===== */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .featured-grid {
    grid-template-columns: 1fr;
  }

  .featured-side {
    flex-direction: row;
  }

  .featured-side-item {
    flex: 1;
  }
}

@media (max-width: 767px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .mobile-header {
    display: flex;
  }

  .main-wrapper {
    margin-left: 0;
    padding-top: 56px;
  }

  .page-hero {
    min-height: 280px;
  }

  .page-hero-content {
    padding: 40px 20px 48px;
  }

  .page-hero h1 {
    font-size: clamp(1.8rem, 6vw, 2.4rem);
  }

  .page-hero-subtitle {
    font-size: 15px;
  }

  .category-intro {
    padding: 32px 0 0;
  }

  .intro-block {
    padding: 24px 20px;
  }

  .intro-text {
    font-size: 15px;
    line-height: 1.8;
  }

  .tag-filter {
    padding: 24px 16px 0;
  }

  .tag-filter-inner {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 8px;
    scrollbar-width: none;
  }

  .tag-filter-inner::-webkit-scrollbar {
    display: none;
  }

  .tag-chip {
    white-space: nowrap;
  }

  .featured-section {
    padding: 40px 0 0;
  }

  .featured-side {
    flex-direction: column;
  }

  .side-item-cover {
    width: 80px;
  }

  .featured-main {
    min-height: 320px;
  }

  .featured-main-title {
    font-size: 20px;
  }

  .reading-grid-section {
    padding: 56px 0 8px;
  }

  .section-head {
    margin-bottom: 24px;
  }

  .reading-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .grid-card-large {
    grid-column: span 1;
    display: block;
  }

  .grid-card-large .grid-card-img {
    aspect-ratio: 16 / 9;
    min-height: auto;
  }

  .grid-card-large h3 {
    font-size: 18px;
  }

  .faq-section {
    padding: 56px 16px 16px;
  }

  .faq-question {
    font-size: 15px;
    padding: 18px 4px;
  }

  .faq-answer {
    font-size: 14px;
    padding: 0 4px 18px;
  }

  .cta-section {
    padding: 32px 16px 56px;
  }

  .cta-block {
    padding: 40px 24px;
  }

  .cta-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    margin-top: 32px;
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }

  .featured-main {
    min-height: 280px;
  }

  .featured-main-overlay {
    padding: 22px 18px;
  }

  .featured-main-title {
    font-size: 18px;
  }

  .grid-card-body {
    padding: 16px 16px 20px;
  }

  .grid-card h3 {
    font-size: 16px;
  }
}