/* roulang page: index */
:root{
  --paper:#F6F0E8;
  --paper-alt:#EFE6DA;
  --dark:#181310;
  --dark-card:#221B14;
  --dark-float:#2C231A;
  --primary:#E85D26;
  --primary-hover:#C94A1C;
  --primary-soft:rgba(232,93,38,.12);
  --accent:#E3A23C;
  --text:#2B2118;
  --muted:#76695C;
  --text-on-dark:#F5EEE6;
  --muted-on-dark:#B7A99A;
  --line:rgba(43,33,24,.1);
  --line-dark:rgba(255,255,255,.1);
  --radius-xs:6px;
  --radius-sm:10px;
  --radius-lg:16px;
  --radius-full:999px;
  --shadow-card:0 12px 28px rgba(43,33,24,.08);
  --shadow-dark:0 14px 30px rgba(0,0,0,.28);
  --header-h:76px;
  --section-pad:clamp(56px,8vw,104px);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--text);font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
a:hover{color:var(--primary-hover)}
ul,ol{margin:0;padding:0}
p{margin:0 0 .8em}
strong,b{font-weight:700}
section[id]{scroll-margin-top:calc(var(--header-h) + 12px)}
.grid-container{max-width:1200px}
.skip-link{position:fixed;left:16px;top:-60px;z-index:1000;background:var(--primary);color:#fff;padding:10px 18px;border-radius:8px;transition:top .2s}
.skip-link:focus{top:14px}

/* ===== buttons / labels ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:.35rem 1.9rem;border-radius:var(--radius-full);border:1.5px solid transparent;font-weight:700;font-size:.95rem;line-height:1.2;cursor:pointer;transition:background .2s,color .2s,border-color .2s,transform .2s,box-shadow .2s;text-align:center}
.btn-primary{background:var(--primary);color:#231108;border-color:var(--primary);box-shadow:0 10px 18px rgba(232,93,38,.2)}
.btn-primary:hover{background:var(--primary-hover);border-color:var(--primary-hover);color:#fff;transform:translateY(-2px);box-shadow:0 14px 22px rgba(201,74,28,.26)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 4px 10px rgba(201,74,28,.18)}
.btn-outline{background:transparent;border-color:rgba(245,238,230,.9);color:var(--text-on-dark)}
.btn-outline:hover{border-color:var(--primary);background:var(--primary);color:#fff;transform:translateY(-2px)}
.btn-outline:active{transform:translateY(0)}
.badge{display:inline-flex;align-items:center;gap:.35rem;font-size:13px;line-height:1;padding:.42rem .78rem;border-radius:var(--radius-full);font-weight:600}
.badge-primary{background:var(--primary-soft);color:var(--primary-hover)}
.badge-dark{background:rgba(24,19,16,.9);color:var(--text-on-dark)}
.badge-accent{background:var(--accent);color:#2B2118}

/* ===== header & nav ===== */
.site-header{position:sticky;top:0;z-index:60;background:rgba(24,19,16,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line-dark);color:var(--text-on-dark)}
.header-inner{position:relative;display:flex;align-items:center;justify-content:space-between;min-height:var(--header-h);gap:16px}
.brand{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);font-size:1.45rem;font-weight:800;letter-spacing:.04em;color:var(--text-on-dark);white-space:nowrap;z-index:3;transition:color .2s}
.brand:hover{color:var(--accent)}
.desktop-nav{display:none;align-items:center;gap:clamp(12px,2.2vw,30px)}
.desktop-nav a:not(.btn){position:relative;font-size:.93rem;font-weight:600;color:var(--muted-on-dark);padding:8px 2px;transition:color .2s}
.desktop-nav a:not(.btn):hover{color:var(--accent)}
.desktop-nav a:not(.btn).is-active{color:var(--accent)}
.desktop-nav a:not(.btn).is-active::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--accent);border-radius:2px}
.btn-nav{min-height:42px;padding:.25rem 1.25rem;font-size:.88rem}
.menu-toggle{display:inline-flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;width:46px;height:46px;background:transparent;border:1px solid rgba(255,255,255,.16);border-radius:10px;cursor:pointer;transition:border-color .2s,background .2s;z-index:8}
.menu-toggle span{display:block;width:20px;height:2px;background:var(--text-on-dark);border-radius:2px;transition:transform .2s,opacity .2s}
.menu-toggle:hover{border-color:var(--primary)}
.mobile-menu{display:none;position:absolute;top:var(--header-h);left:0;right:0;background:#1d1712;border-bottom:1px solid rgba(255,255,255,.1);padding:18px 22px 26px;box-shadow:var(--shadow-dark)}
.mobile-menu.is-open{display:flex;flex-direction:column;gap:2px}
.mobile-menu a{display:flex;align-items:center;padding:13px 14px;color:var(--muted-on-dark);font-weight:600;border-left:3px solid transparent;border-radius:4px;transition:background .2s,color .2s,border-color .2s}
.mobile-menu a:hover{background:rgba(232,93,38,.1);color:var(--text-on-dark);border-left-color:var(--primary)}
.mobile-menu .btn{margin-top:14px;color:#fff}

/* ===== sections ===== */
.section{padding:var(--section-pad) 0}
.section--paper{background:var(--paper)}
.section--tint{background:var(--paper-alt)}
.section--dark{background:var(--dark);color:var(--text-on-dark)}
.eyebrow{display:inline-flex;align-items:center;gap:.5rem;font-size:.8rem;font-weight:700;letter-spacing:.08em;color:var(--primary-hover);text-transform:uppercase;margin-bottom:14px}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--primary);border-radius:2px}
.section--dark .eyebrow{color:var(--accent)}
.section-head{margin-bottom:44px;max-width:760px}
.section-head.is-center{margin-left:auto;margin-right:auto;text-align:center}
.section-head h2{font-size:clamp(1.72rem,3.4vw,2.5rem);line-height:1.3;margin:0 0 12px;font-weight:800;letter-spacing:-.01em}
.section-head p{color:var(--muted);font-size:1.05rem;margin:0}
.section--dark .section-head p, .section--dark .lead-muted{color:var(--muted-on-dark)}
h1,h2,h3,h4{font-family:inherit}
img{border-radius:var(--radius-lg)}

/* ===== hero ===== */
.hero{position:relative;overflow:hidden;background:var(--dark);color:var(--text-on-dark);padding:clamp(70px,9vw,128px) 0 clamp(60px,7vw,92px)}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.3}
.hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(24,19,16,.92) 0%,rgba(24,19,16,.78) 55%,rgba(24,19,16,.58) 100%)}
.hero-inner{position:relative;z-index:2}
.hero-copy .eyebrow{color:var(--accent)}
.hero-copy h1{font-size:clamp(2.1rem,6vw,4.1rem);line-height:1.18;font-weight:800;margin:0 0 20px;max-width:19em;letter-spacing:-.02em;color:var(--text-on-dark)}
.hero-sub{font-size:1.08rem;color:var(--muted-on-dark);max-width:46em;margin:0 0 32px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:38px}
.hero-facts{display:flex;flex-wrap:wrap;gap:clamp(18px,4vw,52px);list-style:none;padding:0;border-top:1px solid rgba(255,255,255,.12);padding-top:26px}
.hero-facts li{display:flex;align-items:baseline;gap:.6rem}
.hero-facts strong{font-size:1.8rem;font-weight:800;color:var(--accent);letter-spacing:.02em}
.hero-facts span{font-size:.82rem;color:var(--muted-on-dark);max-width:90px;line-height:1.3}
.hero-panel{background:rgba(28,22,17,.72);border:1px solid rgba(255,255,255,.1);border-radius:18px;padding:24px;box-shadow:var(--shadow-dark);backdrop-filter:blur(8px)}
.hero-panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid rgba(255,255,255,.09);padding-bottom:14px;margin-bottom:16px}
.hero-panel-title{font-weight:700;color:var(--text-on-dark);font-size:.96rem;display:inline-flex;align-items:center;gap:.5rem}
.hero-panel-title i{color:var(--accent)}
.hero-panel-sub{font-size:.74rem;color:var(--muted-on-dark)}
.hero-panel-list{list-style:none;margin:0;display:flex;flex-direction:column;gap:14px}
.hero-panel-list li{display:flex;gap:13px;align-items:flex-start;padding:0;border:0}
.hero-panel-number{font-size:1.28rem;font-weight:800;color:var(--primary);min-width:30px;line-height:1.4}
.hero-panel-list h3{font-size:.92rem;margin:0 0 3px;color:var(--text-on-dark);font-weight:700}
.hero-panel-list p{font-size:.8rem;color:var(--muted-on-dark);margin:0;line-height:1.5}

/* ===== pain / problem ===== */
.pain-grid{display:grid;grid-template-columns:1fr;gap:20px}
.pain-card{background:#fff;border-radius:var(--radius-lg);padding:28px;border:1px solid var(--line);box-shadow:var(--shadow-card);transition:box-shadow .25s,transform .25s}
.pain-card:hover{box-shadow:0 18px 36px rgba(43,33,24,.12);transform:translateY(-3px)}
.pain-icon{display:flex;align-items:center;justify-content:center;width:48px;height:48px;border-radius:12px;background:var(--primary-soft);color:var(--primary-hover);font-size:20px;margin-bottom:18px}
.pain-card h3{font-size:1.12rem;font-weight:700;margin:0 0 8px}
.pain-card p{color:var(--muted);font-size:.93rem;margin:0;line-height:1.7}

/* ===== solution ===== */
.solution-media{position:relative;border-radius:20px;overflow:hidden;box-shadow:var(--shadow-dark);border:1px solid rgba(255,255,255,.08)}
.solution-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.solution-media figcaption{position:absolute;left:12px;right:12px;bottom:12px;background:rgba(18,13,10,.82);color:var(--text-on-dark);font-size:.82rem;padding:10px 14px;border-radius:10px;backdrop-filter:blur(6px)}
.solution-content .eyebrow{color:var(--accent)}
.solution-content h2{font-size:clamp(1.8rem,3.6vw,2.7rem);line-height:1.3;margin:0 0 16px}
.solution-intro{color:var(--muted-on-dark);margin-bottom:26px;max-width:640px}
.solution-step-list{list-style:none;display:flex;flex-direction:column;gap:0;margin:0}
.solution-step{display:flex;gap:18px;border-top:1px solid rgba(255,255,255,.09);padding:17px 2px 15px}
.solution-step:first-child{border-top:0}
.solution-step-num{font-size:1.55rem;font-weight:800;line-height:1.2;color:var(--primary);min-width:60px}
.solution-step h3{color:var(--text-on-dark);font-size:1rem;font-weight:700;margin:0 0 3px}
.solution-step p{color:var(--muted-on-dark);font-size:.9rem;margin:0;line-height:1.6}
.solution-note{margin-top:22px;font-size:.84rem;color:var(--muted-on-dark);border-left:3px solid var(--accent);padding-left:14px;background:rgba(232,93,38,.08);border-radius:0 8px 8px 0}

/* ===== result stats ===== */
.stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.stat-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px 22px;text-align:center;box-shadow:var(--shadow-card);transition:transform .25s,box-shadow .25s}
.stat-card:hover{transform:translateY(-3px);box-shadow:0 18px 34px rgba(43,33,24,.1)}
.stat-value{font-size:clamp(2rem,5vw,2.7rem);font-weight:800;color:var(--primary);line-height:1.2;margin-bottom:6px;letter-spacing:-.02em}
.stat-label{font-size:.9rem;color:var(--muted);line-height:1.5;margin:0}

/* ===== testimonials ===== */
.testimonial-grid{display:grid;grid-template-columns:1fr;gap:22px}
.testimonial-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-card);display:flex;flex-direction:column;gap:16px;transition:box-shadow .25s,transform .25s}
.testimonial-card:hover{box-shadow:0 18px 36px rgba(43,33,24,.12);transform:translateY(-3px)}
.testimonial-avatar{width:46px;height:46px;border-radius:50%;background:var(--soft2,var(--primary-soft));color:var(--primary-hover);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.05rem}
.testimonial-meta{display:flex;align-items:center;gap:12px}
.testimonial-meta .who{font-weight:700;font-size:.92rem}
.testimonial-meta .desc{color:var(--muted);font-size:.8rem}
.testimonial-card blockquote{margin:0;padding:0;border:0;color:var(--text);font-size:.96rem;line-height:1.8}

/* ===== faq ===== */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-accordion{list-style:none;margin:0;background:transparent}
.faq-accordion .accordion-item{list-style:none;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);margin-bottom:14px;overflow:hidden;box-shadow:0 6px 16px rgba(43,33,24,.04);transition:border-color .25s,box-shadow .25s}
.faq-accordion .accordion-item:hover{border-color:rgba(232,93,38,.45)}
.faq-accordion .accordion-item.is-active{border-color:rgba(232,93,38,.65);box-shadow:0 10px 24px rgba(232,93,38,.12)}
.faq-accordion .accordion-title{position:relative;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:19px 58px 19px 22px;background:transparent;border-bottom:0;color:var(--text);font-size:1.05rem;font-weight:700;line-height:1.45;transition:color .2s,background .2s}
.faq-accordion .accordion-title::before{content:"";display:none}
.faq-accordion .accordion-title:hover{color:var(--primary-hover);background:rgba(232,93,38,.03)}
.faq-accordion .accordion-title .faq-arrow{position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:.9rem;color:var(--primary);transition:transform .25s}
.faq-accordion .accordion-item.is-active .faq-arrow{transform:translateY(-50%) rotate(180deg)}
.faq-accordion .accordion-content{background:transparent;border-top:1px solid rgba(43,33,24,.06);padding:2px 22px 20px;color:var(--text);font-size:.95rem;line-height:1.8}
.no-js .accordion-content{display:block !important}
.accordion-content p:last-child{margin-bottom:0}

/* ===== CTA band ===== */
.cta-section{position:relative;overflow:hidden;background:var(--dark);color:var(--text-on-dark);padding:var(--section-pad) 0}
.cta-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.26}
.cta-overlay{position:absolute;inset:0;background:radial-gradient(circle at center,rgba(232,93,38,.26) 0%,rgba(24,19,16,.86) 70%)}
.cta-inner{position:relative;z-index:2;text-align:center;max-width:820px}
.cta-inner h2{font-size:clamp(1.9rem,4vw,3.2rem);font-weight:800;line-height:1.28;margin:0 0 18px}
.cta-inner p{color:var(--muted-on-dark);font-size:1.05rem;max-width:600px;margin:0 auto 34px}
.cta-note{font-size:.82rem;color:var(--muted-on-dark);opacity:.72;margin-top:16px}

/* ===== footer ===== */
.site-footer{background:var(--dark);color:var(--muted-on-dark);padding:60px 0 28px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px;padding-bottom:32px}
.footer-brand .brand-inline{font-size:1.4rem;font-weight:800;color:var(--text-on-dark);letter-spacing:.03em}
.footer-brand p{font-size:.9rem;color:var(--muted-on-dark);margin:14px 0 0;max-width:290px;line-height:1.7}
.footer-title{font-size:.8rem;font-weight:800;letter-spacing:.06em;color:var(--text-on-dark);margin-bottom:12px}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:8px}
.footer-links a{color:var(--muted-on-dark);font-size:.87rem;transition:color .2s,padding-left .2s}
.footer-links a:hover{color:var(--accent);padding-left:4px;text-decoration:underline}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:22px;display:flex;flex-direction:column;gap:8px}
.footer-copy{font-size:.78rem;color:rgba(183,169,154,.8)}
.footer-safe{font-size:.78rem;color:rgba(183,169,154,.65);max-width:800px;line-height:1.6}

/* ===== responsive ===== */
@media screen and (max-width:1023px){
  .desktop-nav{display:none}
  .menu-toggle{display:inline-flex}
  .brand{left:50%;transform:translate(-50%,-50%)}
  .mobile-menu{display:none}
  .mobile-menu.is-open{display:flex}
  .hero{padding-top:64px;padding-bottom:64px}
  .hero-copy h1{max-width:16em}
  .stats-grid{gap:16px}
}
@media screen and (max-width:639px){
  .hero-sub{font-size:1rem}
  .hero-actions .btn{width:100%}
  .stats-grid{grid-template-columns:1fr}
  .section-head h2{font-size:1.6rem}
  .pain-card,.testimonial-card{padding:22px}
  .footer-grid{gap:26px}
  .hero-panel{margin-top:50px}
}
@media screen and (min-width:640px) and (max-width:1023px){
  .pain-grid{grid-template-columns:repeat(2,1fr)}
  .testimonial-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media screen and (min-width:1024px){
  .desktop-nav{display:flex}
  .menu-toggle{display:none}
  .brand{position:absolute;left:50%;transform:translate(-50%,-50%)}
  .pain-grid{grid-template-columns:repeat(3,1fr)}
  .solution-layout{display:grid;grid-template-columns:0.9fr 1.1fr;gap:60px;align-items:center}
  .stats-grid{grid-template-columns:repeat(4,1fr)}
  .stat-card{padding:30px 18px}
  .testimonial-grid{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr}
  .footer-bottom{flex-direction:row;justify-content:space-between;align-items:center}
}
@media (min-width:1200px){
  .hero-copy h1{font-size:3.9rem}
}

/* roulang page: category1 */
:root{
    --paper:#F6F0E8;
    --paper-alt:#EFE6DA;
    --dark:#181310;
    --dark-card:#221B14;
    --dark-float:#2C231A;
    --primary:#E85D26;
    --primary-hover:#C94A1C;
    --primary-soft:rgba(232,93,38,.12);
    --accent:#E3A23C;
    --text:#2B2118;
    --muted:#76695C;
    --text-on-dark:#F5EEE6;
    --muted-on-dark:#B7A99A;
    --line:rgba(43,33,24,.1);
    --line-dark:rgba(255,255,255,.1);
    --radius-xs:6px;
    --radius-sm:10px;
    --radius-lg:16px;
    --radius-full:999px;
    --shadow-card:0 12px 28px rgba(43,33,24,.08);
    --shadow-dark:0 14px 30px rgba(0,0,0,.28);
    --header-h:76px;
    --section-pad:clamp(56px,8vw,104px);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
    margin:0;
    background:var(--paper);
    color:var(--text);
    font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul,ol,h1,h2,h3,h4,p,figure{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
section[id],div[id]{scroll-margin-top:calc(var(--header-h) + 14px);}
.grid-container{max-width:1200px;}
.section{padding:var(--section-pad) 0;}
.section--paper{background:var(--paper);}
.section--tint{background:var(--paper-alt);}

/* ===== 按钮与徽章 ===== */
.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    min-height:48px;
    padding:.35rem 1.9rem;
    border-radius:var(--radius-full);
    border:1.5px solid transparent;
    font-weight:700;
    font-size:.95rem;
    line-height:1.2;
    cursor:pointer;
    transition:background .2s,color .2s,border-color .2s,transform .2s,box-shadow .2s;
    text-align:center;
}
.btn-primary{
    background:var(--primary);
    border-color:var(--primary);
    color:#231108;
    box-shadow:0 10px 18px rgba(232,93,38,.2);
}
.btn-primary:hover{
    background:var(--primary-hover);
    border-color:var(--primary-hover);
    color:#fff;
    transform:translateY(-2px);
    box-shadow:0 14px 22px rgba(201,74,28,.26);
}
.btn-primary:active{
    transform:translateY(1px);
    box-shadow:0 4px 10px rgba(201,74,28,.18);
}
.btn-outline{
    background:transparent;
    border-color:rgba(245,238,230,.75);
    color:var(--text-on-dark);
}
.btn-outline:hover{
    border-color:var(--primary);
    background:var(--primary);
    color:#fff;
    transform:translateY(-2px);
}
.btn-light-outline{
    background:transparent;
    border-color:rgba(43,33,24,.28);
    color:var(--text);
}
.btn-light-outline:hover{
    border-color:var(--primary);
    background:var(--primary-soft);
    color:var(--primary-hover);
    transform:translateY(-2px);
}
.btn:focus-visible,a:focus-visible,button:focus-visible{
    outline:none;
    box-shadow:0 0 0 3px rgba(232,93,38,.35);
}
.badge{
    display:inline-flex;
    align-items:center;
    gap:.35rem;
    font-size:13px;
    line-height:1;
    padding:.42rem .78rem;
    border-radius:var(--radius-full);
    font-weight:600;
    white-space:nowrap;
}
.badge-primary{background:var(--primary-soft);color:var(--primary-hover);}
.badge-dark{background:rgba(24,19,16,.9);color:var(--text-on-dark);}
.badge-accent{background:var(--accent);color:#2B2118;}

/* ===== 页眉 ===== */
.site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(24,19,16,.96);
    backdrop-filter:blur(12px);
    border-bottom:1px solid var(--line-dark);
    color:var(--text-on-dark);
}
.header-inner{
    position:relative;
    display:flex;
    align-items:center;
    justify-content:space-between;
    min-height:var(--header-h);
    gap:16px;
}
.brand{
    position:absolute;
    left:50%;
    top:50%;
    transform:translate(-50%,-50%);
    font-size:1.45rem;
    font-weight:800;
    letter-spacing:.04em;
    color:var(--text-on-dark);
    white-space:nowrap;
    z-index:3;
    transition:color .2s;
}
.brand:hover{color:var(--accent);}
.desktop-nav{
    display:none;
    align-items:center;
    gap:clamp(12px,2.2vw,30px);
}
.desktop-nav a:not(.btn){
    position:relative;
    font-size:.93rem;
    font-weight:600;
    color:var(--muted-on-dark);
    padding:8px 2px;
    transition:color .2s;
}
.desktop-nav a:not(.btn):hover{color:var(--accent);}
.desktop-nav a:not(.btn).is-active{color:var(--accent);}
.desktop-nav a:not(.btn).is-active::after{
    content:"";
    position:absolute;
    left:0;
    right:0;
    bottom:0;
    height:2px;
    background:var(--accent);
    border-radius:2px;
}
.btn-nav{
    min-height:42px;
    padding:.25rem 1.25rem;
    font-size:.88rem;
}
.menu-toggle{
    display:inline-flex;
    flex-direction:column;
    justify-content:center;
    align-items:center;
    gap:5px;
    width:46px;
    height:46px;
    background:transparent;
    border:1px solid rgba(255,255,255,.16);
    border-radius:10px;
    cursor:pointer;
    transition:border-color .2s,background .2s;
    z-index:8;
}
.menu-toggle span{
    display:block;
    width:20px;
    height:2px;
    background:var(--text-on-dark);
    border-radius:2px;
    transition:transform .2s,opacity .2s;
}
.menu-toggle:hover{border-color:var(--primary);background:rgba(255,255,255,.04);}
.mobile-menu{
    display:none;
    position:absolute;
    top:var(--header-h);
    left:0;
    right:0;
    background:#1d1712;
    border-bottom:1px solid rgba(255,255,255,.1);
    padding:18px 22px 26px;
    box-shadow:var(--shadow-dark);
}
.mobile-menu.is-open{display:flex;flex-direction:column;gap:2px;}
.mobile-menu a{
    display:flex;
    align-items:center;
    padding:13px 14px;
    color:var(--muted-on-dark);
    font-weight:600;
    border-left:3px solid transparent;
    border-radius:4px;
    transition:background .2s,color .2s,border-color .2s;
}
.mobile-menu a.is-active{color:var(--accent);border-left-color:var(--accent);}
.mobile-menu a:hover{background:rgba(232,93,38,.1);color:var(--text-on-dark);}
.mobile-menu a.is-active:hover{border-left-color:var(--accent);}
.mobile-menu .btn{margin-top:14px;color:#fff;}
.eyebrow{
    display:inline-flex;
    align-items:center;
    gap:.5rem;
    font-size:.8rem;
    font-weight:700;
    letter-spacing:.08em;
    color:var(--primary-hover);
    text-transform:uppercase;
    margin-bottom:14px;
}
.eyebrow::before{
    content:"";
    width:22px;
    height:2px;
    background:var(--primary);
    border-radius:2px;
}

/* ===== 分类页头 ===== */
.category-head{
    background:var(--paper);
    border-bottom:1px solid var(--line);
}
.breadcrumb{
    display:flex;
    align-items:center;
    flex-wrap:wrap;
    gap:8px;
    padding:22px 0 0;
    font-size:.84rem;
    color:var(--muted);
}
.breadcrumb a{transition:color .2s;}
.breadcrumb a:hover{color:var(--primary-hover);}
.breadcrumb i{
    color:rgba(118,105,92,.55);
    font-size:.7rem;
}
.breadcrumb span{color:var(--text);font-weight:600;}
.cat-hero-row{
    padding:clamp(26px,4vw,52px) 0 clamp(34px,5vw,64px);
}
.cat-hero-copy h1{
    font-size:clamp(2rem,4.8vw,3.2rem);
    line-height:1.2;
    font-weight:800;
    letter-spacing:-.01em;
    color:var(--text);
    margin-bottom:16px;
}
.cat-lead{
    color:var(--muted);
    font-size:1.04rem;
    max-width:36em;
    margin-bottom:28px;
}
.metric-row{
    display:grid;
    grid-template-columns:repeat(3,auto);
    justify-content:start;
    gap:clamp(20px,4vw,44px);
}
.metric-row div{display:flex;flex-direction:column;}
.metric-row strong{
    font-size:clamp(1.5rem,2.6vw,2.1rem);
    font-weight:800;
    color:var(--primary-hover);
    line-height:1.2;
    letter-spacing:-.02em;
}
.metric-row span{
    font-size:.84rem;
    color:var(--muted);
    margin-top:2px;
}
.cat-hero-media{
    position:relative;
    border-radius:var(--radius-lg);
    overflow:hidden;
    box-shadow:var(--shadow-card);
    background:var(--paper-alt);
}
.cat-hero-media img{
    width:100%;
    aspect-ratio:4/3;
    object-fit:cover;
}
.cat-hero-media figcaption{
    position:absolute;
    left:12px;
    bottom:12px;
    background:rgba(24,19,16,.82);
    color:var(--text-on-dark);
    font-size:.82rem;
    padding:.35rem .8rem;
    border-radius:var(--radius-full);
    backdrop-filter:blur(4px);
}

/* ===== 精选主条目 ===== */
.featured-section{
    padding-top:clamp(40px,5vw,64px);
}
.section-head{
    display:flex;
    justify-content:space-between;
    align-items:flex-end;
    gap:20px;
    margin-bottom:30px;
}
.section-head h2{
    font-size:clamp(1.55rem,3vw,2.2rem);
    font-weight:800;
    line-height:1.3;
    margin-bottom:8px;
    letter-spacing:-.01em;
}
.section-head p{
    color:var(--muted);
    font-size:.98rem;
    max-width:42em;
}
.feature-card{
    position:relative;
    min-height:clamp(340px,40vw,450px);
    border-radius:var(--radius-lg);
    overflow:hidden;
    background-size:cover;
    background-position:center;
    box-shadow:var(--shadow-card);
    display:flex;
    align-items:flex-end;
}
.feature-card::before{
    content:"";
    position:absolute;
    inset:0;
    background:linear-gradient(100deg,rgba(24,19,16,.9) 0%,rgba(24,19,16,.58) 55%,rgba(24,19,16,.22) 100%);
    transition:opacity .2s;
}
.feature-inner{
    position:relative;
    z-index:2;
    padding:clamp(26px,5vw,60px);
    max-width:720px;
}
.feature-tags{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
    margin-bottom:18px;
}
.feature-inner h3{
    color:var(--text-on-dark);
    font-size:clamp(1.35rem,3vw,2.3rem);
    font-weight:800;
    line-height:1.35;
    margin-bottom:12px;
}
.feature-inner p{
    color:var(--muted-on-dark);
    margin-bottom:24px;
    max-width:34em;
    font-size:.98rem;
}
.feature-actions{
    display:flex;
    gap:12px;
    flex-wrap:wrap;
}

/* ===== 筛选标签 ===== */
.filter-section{padding:16px 0 0;}
.filter-box{
    background:var(--paper);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    padding:18px 20px;
    display:flex;
    align-items:center;
    gap:16px;
    flex-wrap:wrap;
    box-shadow:0 6px 16px rgba(43,33,24,.04);
}
.filter-label{
    font-size:.86rem;
    font-weight:700;
    color:var(--muted);
    letter-spacing:.04em;
    flex-shrink:0;
}
.filter-tags{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
}
.filter-tag{
    appearance:none;
    border:1px solid transparent;
    background:rgba(43,33,24,.07);
    color:var(--text);
    font-size:.86rem;
    font-weight:600;
    padding:.4rem .9rem;
    border-radius:var(--radius-full);
    cursor:pointer;
    transition:background .2s,color .2s,border-color .2s,transform .2s;
}
.filter-tag:hover{
    background:var(--primary-soft);
    color:var(--primary-hover);
    border-color:rgba(232,93,38,.2);
}
.filter-tag.is-active{
    background:var(--primary);
    color:#fff;
    border-color:var(--primary);
}
.filter-tag:active{transform:scale(.97);}

/* ===== 内容卡片 ===== */
.library-section{
    padding-bottom:clamp(36px,5vw,64px);
}
.card-cell{
    margin-bottom:24px;
}
.entry-card{
    height:100%;
    display:flex;
    flex-direction:column;
    background:var(--paper);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    overflow:hidden;
    box-shadow:0 6px 14px rgba(43,33,24,.05);
    transition:transform .24s,box-shadow .24s;
}
.entry-card:hover{
    transform:translateY(-4px);
    box-shadow:var(--shadow-card);
}
.entry-card[hidden],.hidden-card{display:none!important;}
.card-media{
    position:relative;
    display:block;
    aspect-ratio:16/9;
    overflow:hidden;
    background:var(--paper-alt);
}
.card-media img{
    width:100%;
    height:100%;
    object-fit:cover;
    transition:transform .35s ease;
}
.entry-card:hover .card-media img{transform:scale(1.04);}
.card-media .badge{
    position:absolute;
    left:12px;
    top:12px;
    z-index:3;
    background:rgba(24,19,16,.86);
    color:var(--text-on-dark);
    backdrop-filter:blur(4px);
}
.card-body{
    padding:18px 20px 20px;
    display:flex;
    flex-direction:column;
    flex:1;
}
.card-body h3{
    font-size:1.1rem;
    font-weight:700;
    line-height:1.45;
    margin-bottom:8px;
}
.card-body h3 a{transition:color .2s;}
.card-body h3 a:hover{color:var(--primary-hover);}
.card-body p{
    color:var(--muted);
    font-size:.92rem;
    line-height:1.7;
    display:-webkit-box;
    -webkit-line-clamp:3;
    -webkit-box-orient:vertical;
    overflow:hidden;
    margin-bottom:16px;
}
.card-meta{
    margin-top:auto;
    display:flex;
    align-items:center;
    gap:8px;
    font-size:.8rem;
    color:rgba(118,105,92,.9);
    border-top:1px solid var(--line);
    padding-top:12px;
}
.card-meta i{font-size:.72rem;color:var(--primary);}

/* ===== 热门排行 ===== */
.rank-section{
    background:var(--dark);
    color:var(--text-on-dark);
}
.rank-section .section-head h2{color:var(--text-on-dark);}
.rank-section .section-head p{color:var(--muted-on-dark);}
.rank-list{
    display:flex;
    flex-direction:column;
    gap:8px;
    margin-top:4px;
}
.rank-item{
    display:grid;
    grid-template-columns:72px 1fr 38px;
    align-items:center;
    gap:18px;
    background:var(--dark-card);
    border:1px solid var(--line-dark);
    border-radius:14px;
    padding:13px 18px;
    transition:background .2s,transform .2s,border-color .2s;
}
.rank-item:hover{
    background:var(--dark-float);
    border-color:rgba(232,93,38,.45);
    transform:translateX(4px);
}
.rank-num{
    font-size:1.55rem;
    font-weight:800;
    color:var(--accent);
    letter-spacing:.02em;
    line-height:1;
}
.rank-title{
    color:var(--text-on-dark);
    font-size:.98rem;
    font-weight:600;
}
.rank-item:hover .rank-title{color:var(--accent);}
.rank-extra{
    margin-top:4px;
    font-size:.8rem;
    color:var(--muted-on-dark);
    font-weight:400;
}
.rank-arrow{
    /* placeholder keeps right aligned */
    display:flex;
    justify-content:flex-end;
    color:var(--muted-on-dark);
    transition:color .2s,transform .2s;
}
.rank-item:hover .rank-arrow{
    color:var(--accent);
    transform:translateX(4px);
}

/* ===== FAQ ===== */
.faq-section{background:var(--paper-alt);}
.faq-accordion{
    background:transparent;
    border:0;
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:12px;
}
.faq-card{
    background:var(--paper);
    border:1px solid var(--line)!important;
    border-radius:var(--radius-lg)!important;
    overflow:hidden;
    margin-bottom:0!important;
    transition:box-shadow .2s,border-color .2s;
    break-inside:avoid;
}
.faq-card:hover{
    box-shadow:var(--shadow-card);
    border-color:rgba(232,93,38,.3)!important;
}
.faq-card .accordion-title{
    background:transparent;
    border:0;
    color:var(--text);
    font-size:1rem;
    font-weight:700;
    line-height:1.4;
    padding:18px 46px 18px 18px;
    position:relative;
    border-left:3px solid transparent;
}
.faq-card .accordion-title:hover,
.faq-card .accordion-title:focus{
    background:var(--primary-soft);
    color:var(--primary-hover);
}
.faq-card.is-active .accordion-title{
    background:transparent;
    border-left-color:var(--primary);
    color:var(--primary-hover);
}
.faq-card .accordion-title::before,
.faq-card .accordion-title::after{
    font-family:"Font Awesome 6 Free";
    font-weight:900;
    font-size:.85rem;
    color:var(--primary);
}
.faq-card .accordion-title::after{
    content:"\f078";
    position:absolute;
    right:18px;
    top:50%;
    transform:translateY(-50%);
    transition:transform .25s;
}
.faq-card.is-active .accordion-title::after{
    transform:translateY(-50%) rotate(180deg);
}
.faq-card .accordion-content{
    background:transparent;
    border:0;
    color:var(--muted);
    padding:0 20px 20px;
    font-size:.93rem;
    line-height:1.75;
}
.faq-card .accordion-content p{
    border-top:1px dashed var(--line);
    padding-top:12px;
}

/* ===== 窄 CTA ===== */
.strap-cta{
    background:var(--dark);
    border-radius:var(--radius-lg);
    overflow:hidden;
    position:relative;
    padding:clamp(32px,5vw,52px);
    background-image:url("/assets/images/backpic/back-3.jpg");
    background-size:cover;
    background-position:center;
}
.strap-cta::before{
    content:"";
    position:absolute;
    inset:0;
    background:linear-gradient(90deg,rgba(24,19,16,.95) 0%,rgba(24,19,16,.82) 60%,rgba(24,19,16,.55) 100%);
}
.strap-inner{
    position:relative;
    z-index:2;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:24px;
    flex-wrap:wrap;
}
.strap-inner h2{
    color:var(--text-on-dark);
    font-size:clamp(1.4rem,2.6vw,2rem);
    margin-bottom:6px;
}
.strap-inner p{
    color:var(--muted-on-dark);
    max-width:36em;
}
.strap-actions{display:flex;gap:12px;flex-wrap:wrap;}
.strap-cta .btn-primary{color:#231108;}
.strap-cta .btn-primary:hover{color:#fff;}

/* ===== 页脚 ===== */
.site-footer{
    background:var(--dark);
    color:var(--text-on-dark);
    padding:clamp(56px,7vw,80px) 0 28px;
}
.footer-grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:32px 26px;
    margin-bottom:42px;
}
.footer-brand .brand-inline{
    font-size:1.3rem;
    font-weight:800;
    letter-spacing:.03em;
    color:var(--text-on-dark);
    display:inline-block;
    margin-bottom:10px;
}
.footer-brand p{
    color:var(--muted-on-dark);
    font-size:.9rem;
    max-width:30em;
    line-height:1.8;
}
.footer-title{
    font-size:.95rem;
    color:var(--text-on-dark);
    opacity:.9;
    margin-bottom:12px;
    letter-spacing:.02em;
}
.footer-links li{margin-bottom:6px;}
.footer-links a{
    color:var(--muted-on-dark);
    font-size:.84rem;
    transition:color .2s;
}
.footer-links a:hover{
    color:var(--primary);
    text-decoration:underline;
    text-underline-offset:4px;
}
.footer-bottom{
    border-top:1px solid var(--line-dark);
    padding-top:20px;
    font-size:.8rem;
    color:rgba(183,169,154,.8);
    display:flex;
    flex-wrap:wrap;
    gap:10px 24px;
    align-items:center;
    justify-content:space-between;
}
.footer-safe{max-width:48em;}

/* ===== Medium & Large 断点 ===== */
@media screen and (min-width:640px){
    .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;}
}
@media screen and (max-width:1023px){
    .desktop-nav{display:none!important;}
    .menu-toggle{display:inline-flex;}
    .category-head .metric-row{gap:20px;}
}
@media screen and (min-width:1024px){
    .desktop-nav{display:flex;}
    .menu-toggle{display:none;}
}
@media screen and (max-width:639px){
    body{font-size:15.5px;}
    .section{padding:56px 0;}
    .cat-hero-copy h1{font-size:clamp(1.7rem,8vw,2.4rem);}
    .section-head{flex-direction:column;align-items:flex-start;}
    .rank-item{grid-template-columns:52px 1fr 28px;gap:12px;padding:12px 14px;}
    .rank-num{font-size:1.2rem;}
    .rank-title{font-size:.9rem;}
    .rank-extra{font-size:.75rem;}
    .faq-accordion{grid-template-columns:1fr;}
    .feature-inner p{font-size:.92rem;}
    .feature-actions .btn{width:100%;}
    .strap-inner{flex-direction:column;justify-content:flex-start;}
    .footer-bottom{flex-direction:column;align-items:flex-start;}
}