/* roulang page: index */
:root{--ink:#17263d;--muted:#64748b;--blue:#3678e8;--blue-deep:#245bc0;--sky:#edf5ff;--cyan:#dff7f6;--violet:#eeeaff;--paper:#f7faff;--line:#dce7f3;--white:#fff;--radius:20px;--shadow:0 14px 36px rgba(41,76,126,.10);--ease:.25s ease}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75;font-size:15px}a{color:inherit;text-decoration:none;transition:var(--ease)}button,input,select,textarea{font:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid rgba(54,120,232,.32);outline-offset:3px}img{max-width:100%;display:block}.shell{min-height:100vh}.sidebar{position:fixed;z-index:20;inset:0 auto 0 0;width:248px;background:#fbfdff;border-right:1px solid var(--line);padding:28px 18px;display:flex;flex-direction:column}.brand{display:flex;align-items:flex-start;gap:10px;padding:5px 10px 32px;font-weight:800;font-size:18px;line-height:1.3;letter-spacing:-.5px}.brand-mark{width:34px;height:34px;border-radius:11px;background:var(--blue);position:relative;flex:none;box-shadow:0 7px 15px rgba(54,120,232,.24)}.brand-mark:after,.brand-mark:before{content:"";position:absolute;border:2px solid #fff;border-radius:50%}.brand-mark:before{width:12px;height:12px;left:7px;top:6px}.brand-mark:after{width:7px;height:7px;right:6px;bottom:6px}.nav-title{padding:0 12px 9px;color:#9aaabd;font-size:11px;letter-spacing:1.5px}.side-nav{display:grid;gap:7px}.side-nav a{display:flex;align-items:center;gap:12px;padding:12px;border-radius:12px;color:var(--muted);font-weight:650}.side-nav a:hover{background:var(--sky);color:var(--blue)}.side-nav a.active{color:var(--blue-deep);background:var(--sky);box-shadow:inset 3px 0 var(--blue)}.nav-dot{width:8px;height:8px;border-radius:50%;background:#b9c8d9}.active .nav-dot{background:var(--blue);box-shadow:0 0 0 4px #d8e8ff}.side-note{margin-top:auto;border:1px solid var(--line);background:#f2f7fd;border-radius:15px;padding:14px;color:var(--muted);font-size:12px}.content{margin-left:248px}.mobilebar{display:none}.container-wide{width:min(1160px,calc(100% - 72px));margin:auto}.section{padding:88px 0}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue-deep);font-size:12px;font-weight:800;letter-spacing:1.2px;text-transform:uppercase}.eyebrow:before{content:"";width:22px;height:2px;background:var(--blue);border-radius:3px}h1,h2,h3{margin:0;font-weight:800;letter-spacing:-.04em;line-height:1.22}h1{font-size:clamp(38px,5vw,64px);max-width:720px}h2{font-size:clamp(28px,3.4vw,42px)}h3{font-size:20px}.lead{color:var(--muted);font-size:17px;max-width:670px;margin:20px 0 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:30px}.section-head p{margin:0;color:var(--muted);max-width:520px}.btn-main,.btn-sub{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 21px;border-radius:12px;font-weight:750;border:1px solid transparent;transition:var(--ease)}.btn-main{background:var(--blue);color:white;box-shadow:0 9px 18px rgba(54,120,232,.2)}.btn-main:hover{background:var(--blue-deep);color:#fff;transform:translateY(-2px);box-shadow:0 12px 22px rgba(36,91,192,.25)}.btn-main:active,.btn-sub:active{transform:translateY(1px)}.btn-sub{background:#fff;border-color:#cbdced;color:var(--blue-deep)}.btn-sub:hover{border-color:var(--blue);background:var(--sky);color:var(--blue-deep)}.hero{padding:64px 0 66px;background:#f6faff;border-bottom:1px solid var(--line);position:relative;overflow:hidden}.hero:after{content:"";position:absolute;width:370px;height:370px;border:1px solid #d5e6fb;border-radius:50%;right:-120px;top:-170px;box-shadow:0 0 0 32px #f2f8ff,0 0 0 64px #f7fbff}.hero-top{display:flex;justify-content:space-between;gap:40px;align-items:end;position:relative;z-index:1}.hero-copy{flex:1}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.coupon-panel{width:320px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);position:relative}.coupon-panel:before{content:"免费入口";position:absolute;right:18px;top:18px;background:var(--cyan);color:#15716d;border-radius:20px;padding:3px 9px;font-size:11px;font-weight:800}.coupon-panel h3{padding-right:80px;margin-bottom:9px}.coupon-panel p{color:var(--muted);font-size:13px;margin:0 0 17px}.dash{margin-top:40px;display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.metric{background:#fff;border:1px solid var(--line);padding:20px;border-radius:16px;box-shadow:0 7px 22px rgba(41,76,126,.06)}.metric small{display:block;color:var(--muted);font-weight:650}.metric strong{display:block;font-size:29px;line-height:1.2;margin:8px 0 4px}.metric span{font-size:12px;color:#5385b8}.matrix{display:grid;grid-template-columns:1.25fr .75fr .75fr;grid-template-rows:auto auto;gap:16px}.feature-card,.mini-card,.compare-card,.theme-card,.info-panel,.form-box{border:1px solid var(--line);background:#fff;border-radius:var(--radius);box-shadow:var(--shadow)}.feature-card{grid-row:span 2;padding:32px;background:#eaf3ff;position:relative;overflow:hidden}.feature-card:after{content:"✦  ·  ○  ·  ✦";position:absolute;right:25px;bottom:25px;color:#9bc1f6;font-size:24px;letter-spacing:10px}.card-num{color:var(--blue);font-weight:800;font-size:12px;margin-bottom:32px}.feature-card p,.mini-card p,.theme-card p{color:var(--muted);font-size:14px;margin:12px 0 22px}.mini-card{padding:24px}.mini-card:nth-child(3){background:#f0fbfa}.mini-card:nth-child(4){background:#f3f0ff}.link-arrow{color:var(--blue-deep);font-weight:750;font-size:13px}.compare{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.compare-grid{display:grid;grid-template-columns:1fr 60px 1fr;align-items:stretch;gap:16px}.compare-card{padding:28px;box-shadow:none}.compare-card.soft{background:#f8fafc}.compare-card.strong{background:#edf5ff;border-color:#c6dcfa}.compare-card ul{padding:0;margin:22px 0 0;list-style:none;color:var(--muted)}.compare-card li{padding:8px 0;border-bottom:1px dashed var(--line)}.compare-card li:before{content:"✓";color:var(--blue);font-weight:800;margin-right:8px}.vs{align-self:center;width:44px;height:44px;border-radius:50%;background:var(--blue);color:#fff;display:grid;place-items:center;font-size:12px;font-weight:800}.theme-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.theme-card{padding:24px}.theme-icon{width:42px;height:42px;border-radius:13px;background:var(--violet);color:#6a55c7;display:grid;place-items:center;font-weight:800;margin-bottom:25px}.theme-card:nth-child(2) .theme-icon{background:var(--cyan);color:#177b75}.theme-card:nth-child(3) .theme-icon{background:var(--sky);color:var(--blue)}.info-layout{display:grid;grid-template-columns:1fr 340px;gap:20px}.info-panel{padding:27px}.info-list{list-style:none;padding:0;margin:0}.info-list li{display:flex;justify-content:space-between;gap:20px;padding:17px 0;border-bottom:1px solid var(--line)}.info-list li:last-child{border:0}.info-list a{font-weight:700}.info-list a:hover{color:var(--blue)}.info-list small{color:#8b9caf;white-space:nowrap}.side-feature{background:var(--ink);color:#fff}.side-feature p{color:#b9c8dc;font-size:14px}.tag{display:inline-block;padding:4px 9px;border-radius:20px;background:var(--sky);color:var(--blue-deep);font-size:11px;font-weight:750}.accordion-item{border:1px solid var(--line)!important;margin-bottom:10px;border-radius:13px!important;overflow:hidden;background:#fff}.accordion-button{font-weight:750;color:var(--ink);background:#fff;box-shadow:none!important;padding:19px 22px}.accordion-button:not(.collapsed){color:var(--blue-deep);background:var(--sky)}.accordion-body{color:var(--muted);padding:0 22px 20px}.cta{background:#eaf3ff;border:1px solid #cfe2fa;border-radius:25px;padding:38px}.form-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:36px;align-items:start}.form-copy p{color:var(--muted);margin-top:15px}.form-box{padding:26px}.form-label{font-size:13px;font-weight:750;margin-bottom:7px}.form-control,.form-select{border:1px solid #ccdceb;border-radius:10px;min-height:46px;color:var(--ink);box-shadow:none}.form-control::placeholder{color:#a4b1c1}.form-control:focus,.form-select:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(54,120,232,.11)}textarea.form-control{min-height:105px}.privacy{font-size:12px;color:#8494a7;margin:13px 0}.feedback{display:none;margin-top:12px;padding:10px 13px;border-radius:9px;background:#e4f7f0;color:#176b53;font-size:13px}.footer{background:#edf3f9;border-top:1px solid var(--line);padding:35px 0;color:var(--muted)}.footer-grid{display:flex;justify-content:space-between;gap:30px}.footer-brand{color:var(--ink);font-weight:800}.footer-links{display:flex;gap:22px;font-size:13px}.footer-links a:hover{color:var(--blue)}.copyright{font-size:12px;margin-top:20px;color:#8b9caf}.mobile-menu{display:none}
@media(max-width:1050px){.sidebar{width:215px}.content{margin-left:215px}.container-wide{width:min(100% - 42px,1000px)}.hero-top{align-items:start}.coupon-panel{width:280px}.matrix{grid-template-columns:1fr 1fr}.feature-card{grid-row:auto;grid-column:span 2}.info-layout{grid-template-columns:1fr}}
@media(max-width:767px){.sidebar{display:none}.content{margin-left:0}.mobilebar{display:flex;position:sticky;top:0;z-index:30;min-height:68px;padding:12px 18px;background:#fbfdff;border-bottom:1px solid var(--line);align-items:center;justify-content:space-between}.mobile-brand{font-weight:800;display:flex;align-items:center;gap:8px;font-size:15px}.mobile-brand .brand-mark{width:28px;height:28px}.menu-btn{border:1px solid var(--line);background:#fff;border-radius:9px;padding:7px 11px;color:var(--blue-deep)}.mobile-menu{padding:10px 18px 17px;background:#fbfdff;border-bottom:1px solid var(--line)}.mobile-menu a{display:block;padding:9px;color:var(--muted);font-weight:700}.mobile-menu a.active{color:var(--blue)}.hero{padding:48px 0}.hero-top{display:block}.coupon-panel{width:100%;margin-top:28px}.dash{grid-template-columns:1fr 1fr}.section{padding:62px 0}.section-head{display:block}.section-head p{margin-top:12px}.matrix,.theme-grid,.form-layout{grid-template-columns:1fr}.feature-card{grid-column:auto}.compare-grid{grid-template-columns:1fr;gap:10px}.vs{margin:auto}.footer-grid{display:block}.footer-links{margin-top:18px;flex-wrap:wrap}.info-list li{display:block}.info-list small{display:block;margin-top:5px}h1{font-size:39px}}
@media(max-width:430px){.container-wide{width:calc(100% - 30px)}.dash{gap:9px}.metric{padding:14px}.metric strong{font-size:24px}.hero-actions .btn-main,.hero-actions .btn-sub{width:100%}.cta{padding:24px 17px}}

/* roulang page: category1 */
:root{--ink:#17263d;--muted:#64748b;--blue:#3678e8;--blue-deep:#245bc0;--sky:#edf5ff;--cyan:#dff7f6;--violet:#eeeaff;--paper:#f7faff;--line:#dce7f3;--white:#fff;--radius:20px;--shadow:0 14px 36px rgba(41,76,126,.10);--ease:.25s ease}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75;font-size:15px}
a{color:inherit;text-decoration:none;transition:var(--ease)}
button,input,select,textarea{font:inherit}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid rgba(54,120,232,.32);outline-offset:3px}
img{max-width:100%;display:block}
.app-shell{min-height:100vh;padding-left:248px}
.sidebar{position:fixed;z-index:20;inset:0 auto 0 0;width:248px;padding:30px 18px;background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column}
.brand{display:flex;align-items:flex-start;gap:10px;padding:5px 10px 32px;font-weight:800;font-size:18px;line-height:1.3;letter-spacing:-.5px}
.brand-mark{width:34px;height:34px;border-radius:11px;background:var(--blue);position:relative;flex:none;box-shadow:0 7px 15px rgba(54,120,232,.24)}
.brand-mark:after,.brand-mark:before{content:"";position:absolute;border:2px solid #fff;border-radius:50%}
.brand-mark:before{width:12px;height:12px;left:7px;top:6px}
.brand-mark:after{width:7px;height:7px;right:6px;bottom:6px}
.nav-title{padding:0 12px 9px;color:#9aaabd;font-size:11px;letter-spacing:1.5px}
.side-nav{display:grid;gap:7px}
.side-nav a{display:flex;align-items:center;gap:12px;padding:12px;border-radius:12px;color:var(--muted);font-weight:650}
.side-nav a:hover{background:var(--sky);color:var(--blue)}
.side-nav a.active{color:var(--blue-deep);background:var(--sky);box-shadow:inset 3px 0 var(--blue)}
.nav-dot{width:8px;height:8px;border-radius:50%;background:#b9c8d9}
.active .nav-dot{background:var(--blue);box-shadow:0 0 0 4px #d8e8ff}
.sidebar-note{margin-top:auto;padding:16px;border-radius:15px;background:#f5f9fe;border:1px solid var(--line);color:var(--muted);font-size:12px;line-height:1.7}
.sidebar-note strong{display:block;color:var(--ink);font-size:13px;margin-bottom:3px}
.mobilebar{display:none}
.container-wide{width:min(1160px,calc(100% - 72px));margin:auto}
.page-main{min-height:calc(100vh - 180px)}
.crumbs{display:flex;gap:9px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:22px}
.crumbs span{color:#a4b4c6}
.section{padding:72px 0}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue-deep);font-size:12px;font-weight:800;letter-spacing:1.2px}
.eyebrow:before{content:"";width:22px;height:2px;background:var(--blue);border-radius:3px}
.lead{color:var(--muted);font-size:17px;max-width:720px;margin:16px 0 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:28px}
.section-head h2{font-size:28px;letter-spacing:-.8px;margin:8px 0 0}
.section-head p{margin:0;color:var(--muted);max-width:480px}
.btn-main,.btn-sub{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 21px;border-radius:12px;font-weight:750;border:1px solid transparent;transition:var(--ease);cursor:pointer}
.btn-main{background:var(--blue);color:#fff;box-shadow:0 9px 18px rgba(54,120,232,.2)}
.btn-main:hover{background:var(--blue-deep);color:#fff;transform:translateY(-2px);box-shadow:0 12px 22px rgba(36,91,192,.25)}
.btn-main:active,.btn-sub:active{transform:translateY(1px)}
.btn-sub{background:#fff;border-color:#cbdced;color:var(--blue-deep)}
.btn-sub:hover{border-color:var(--blue);background:var(--sky);color:var(--blue-deep)}
.index-hero{padding:62px 0 42px;position:relative;overflow:hidden;background:#f6faff;border-bottom:1px solid var(--line)}
.index-hero:after{content:"";width:260px;height:260px;position:absolute;right:7%;top:-145px;border:1px solid #cde0f8;border-radius:50%;box-shadow:0 0 0 28px #f1f7ff,0 0 0 56px #f8fbff}
.index-hero h1{font-size:clamp(32px,4vw,51px);line-height:1.18;letter-spacing:-2px;margin:10px 0 0;max-width:760px;position:relative;z-index:1}
.filter-panel{margin-top:36px;padding:20px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:var(--shadow);position:relative;z-index:2}
.filter-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr auto;gap:12px;align-items:end}
.form-label{font-size:12px;color:var(--muted);font-weight:750;margin:0 0 6px}
.form-control,.form-select{border:1px solid #ccdceb;border-radius:10px;min-height:46px;color:var(--ink);box-shadow:none;background:#fff}
.form-control::placeholder{color:#a4b1c1}
.form-control:focus,.form-select:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(54,120,232,.11)}
.filter-result{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:17px;color:var(--muted);font-size:13px}
.tag{display:inline-block;padding:4px 9px;border-radius:20px;background:var(--sky);color:var(--blue-deep);font-size:11px;font-weight:750}
.tag.mint{background:var(--cyan);color:#177b75}
.tag.violet{background:var(--violet);color:#6452b8}
.tag.gray{background:#f0f4f8;color:#627388}
.feature-index{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;margin-bottom:18px}
.feature-card,.list-card,.tip-card,.empty-state{border:1px solid var(--line);background:#fff;border-radius:var(--radius);box-shadow:var(--shadow)}
.feature-card{padding:31px;position:relative;overflow:hidden;background:#eaf3ff}
.feature-card:after{content:"01";position:absolute;right:25px;top:13px;color:#c0daf9;font-weight:850;font-size:70px;line-height:1}
.feature-card h3{font-size:24px;position:relative;z-index:1;margin:15px 0 10px}
.feature-card p{color:var(--muted);max-width:530px;margin:0 0 22px;position:relative;z-index:1}
.feature-meta{display:flex;gap:8px;flex-wrap:wrap;position:relative;z-index:1}
.tip-card{padding:28px;background:var(--ink);color:#fff}
.tip-card h3{font-size:20px;margin:12px 0}
.tip-card p{color:#b9c8dc;margin:0 0 20px}
.tip-card .tag{background:rgba(255,255,255,.13);color:#dceaff}
.results-wrap{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:22px;align-items:start}
.result-list{display:grid;gap:13px}
.list-card{padding:22px 24px;display:grid;grid-template-columns:72px minmax(0,1fr) auto;gap:19px;align-items:center;box-shadow:none;transition:var(--ease)}
.list-card:hover{border-color:#b9d5f7;box-shadow:var(--shadow);transform:translateY(-2px)}
.item-number{width:52px;height:52px;border-radius:16px;background:var(--sky);display:grid;place-items:center;color:var(--blue-deep);font-size:18px;font-weight:850}
.list-card:nth-child(2) .item-number{background:var(--cyan);color:#177b75}
.list-card:nth-child(3) .item-number{background:var(--violet);color:#6452b8}
.list-card h3{font-size:18px;margin:0 0 7px;line-height:1.4}
.list-card p{margin:7px 0 0;color:var(--muted);font-size:14px;line-height:1.65}
.item-tags{display:flex;gap:7px;flex-wrap:wrap}
.item-action{white-space:nowrap;font-size:13px;font-weight:750;color:var(--blue-deep)}
.item-action:hover{color:var(--blue)}
.info-panel{border:1px solid var(--line);background:#fff;border-radius:var(--radius);padding:22px;box-shadow:none}
.info-panel h3{font-size:16px;margin:0 0 13px}
.info-list{list-style:none;padding:0;margin:0}
.info-list li{padding:13px 0;border-bottom:1px solid var(--line);color:var(--muted);font-size:13px}
.info-list li:last-child{border:0}
.info-list strong{display:block;color:var(--ink);font-size:14px;margin-bottom:2px}
.notice{margin-top:18px;padding:18px 20px;border-radius:15px;background:#f1f8ff;border:1px solid #d9e9fa;color:var(--muted);font-size:13px}
.notice strong{color:var(--blue-deep)}
.pagination{display:flex;gap:8px;align-items:center;margin-top:30px}
.pagination a,.pagination span{width:38px;height:38px;display:grid;place-items:center;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--muted);font-weight:700;font-size:13px}
.pagination a:hover,.pagination .current{background:var(--blue);color:#fff;border-color:var(--blue)}
.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.guide-card{padding:23px;border-radius:18px;border:1px solid var(--line);background:#fff;transition:var(--ease)}
.guide-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#c3dcf7}
.guide-step{display:block;color:var(--blue);font-size:12px;font-weight:850;margin-bottom:12px}
.guide-card h3{font-size:17px;margin:0 0 8px}
.guide-card p{color:var(--muted);font-size:14px;margin:0}
.cta{background:#eaf3ff;border:1px solid #cfe2fa;border-radius:25px;padding:36px;display:flex;justify-content:space-between;gap:28px;align-items:center}
.cta h2{font-size:27px;letter-spacing:-.8px;margin:8px 0 0}
.cta p{color:var(--muted);margin:10px 0 0;max-width:650px}
.footer{background:#edf3f9;border-top:1px solid var(--line);padding:35px 0;color:var(--muted)}
.footer-grid{display:flex;justify-content:space-between;gap:30px}
.footer-brand{color:var(--ink);font-weight:800;line-height:1.55}
.footer-links{display:flex;gap:20px;align-items:flex-start;flex-wrap:wrap}
.footer-links a{font-size:14px;font-weight:700;color:var(--muted)}
.footer-links a:hover{color:var(--blue)}
.copyright{font-size:12px;color:#8192a6;margin-top:22px}
.mobile-menu{display:none}
@media(max-width:1024px){.app-shell{padding-left:210px}.sidebar{width:210px}.container-wide{width:min(100%,calc(100% - 48px))}.filter-grid{grid-template-columns:1fr 1fr 1fr}.filter-grid .filter-key{grid-column:span 3}.results-wrap{grid-template-columns:1fr}.info-panel{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.info-panel h3{grid-column:span 3}.info-list li{border:0;padding:0}.guide-grid{grid-template-columns:1fr 1fr}}
@media(max-width:768px){.app-shell{padding-left:0}.sidebar{display:none}.mobilebar{height:64px;padding:12px 18px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:30}.mobile-brand{font-weight:850;font-size:14px;letter-spacing:-.5px;display:flex;align-items:center;gap:8px;max-width:calc(100% - 58px);line-height:1.25}.mobile-brand .brand-mark{width:29px;height:29px;border-radius:9px}.mobile-brand .brand-mark:before{width:10px;height:10px;left:6px;top:5px}.mobile-brand .brand-mark:after{width:6px;height:6px;right:5px;bottom:5px}.menu-toggle{border:1px solid var(--line);background:var(--sky);border-radius:10px;width:40px;height:40px;color:var(--blue-deep);font-size:20px;line-height:1}.mobile-menu{display:none;position:fixed;top:64px;left:0;right:0;padding:14px 18px 20px;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 18px 32px rgba(27,59,100,.12);z-index:29}.mobile-menu.open{display:grid;gap:7px}.mobile-menu a{padding:12px;border-radius:10px;color:var(--muted);font-weight:700}.mobile-menu a.active{background:var(--sky);color:var(--blue-deep)}.container-wide{width:min(100%,calc(100% - 34px))}.index-hero{padding:42px 0 32px}.index-hero h1{letter-spacing:-1px}.lead{font-size:15px}.filter-grid,.feature-index,.guide-grid{grid-template-columns:1fr}.filter-grid .filter-key{grid-column:auto}.section{padding:56px 0}.section-head{display:block}.section-head p{margin-top:13px}.list-card{grid-template-columns:54px minmax(0,1fr);padding:19px}.item-action{grid-column:2}.info-panel{display:block}.info-panel h3{margin-bottom:15px}.info-list li{padding:11px 0;border-bottom:1px solid var(--line)}.cta{display:block;padding:27px}.cta .btn-main{margin-top:20px}.footer-grid{display:block}.footer-links{margin-top:20px}}
@media(max-width:520px){body{font-size:14px}.index-hero h1{font-size:32px}.filter-panel{padding:15px}.list-card h3{font-size:16px}.item-number{width:45px;height:45px;border-radius:13px}.feature-card,.tip-card{padding:23px}.feature-card h3{font-size:21px}.section-head h2,.cta h2{font-size:23px}.pagination{justify-content:center}.pagination a,.pagination span{width:34px;height:34px}.footer-links{display:grid;gap:11px}}

/* roulang page: category2 */
:root{
      --ink:#17263d;--muted:#64748b;--blue:#3678e8;--blue-deep:#245bc0;
      --sky:#edf5ff;--cyan:#dff7f6;--violet:#eeeaff;--paper:#f7faff;
      --line:#dce7f3;--white:#fff;--radius:20px;
      --shadow:0 14px 36px rgba(41,76,126,.10);--ease:.25s ease;
    }
    *,*:before,*:after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75;font-size:15px}
    a{color:inherit;text-decoration:none;transition:var(--ease)}
    button,input,select,textarea{font:inherit}
    button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid rgba(54,120,232,.32);outline-offset:3px}
    img{max-width:100%;display:block}
    h1,h2,h3,h4{line-height:1.3;letter-spacing:-.6px}
    h1{font-size:clamp(34px,4vw,58px);font-weight:850;margin:14px 0}
    h2{font-size:clamp(27px,3vw,38px);font-weight:820;margin:0}
    h3{font-size:20px;font-weight:800;margin:0}
    .app-shell{min-height:100vh}
    .sidebar{position:fixed;z-index:20;left:0;top:0;bottom:0;width:246px;padding:31px 22px;background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column}
    .brand{display:flex;align-items:flex-start;gap:10px;padding:5px 10px 32px;font-weight:800;font-size:18px;line-height:1.3;letter-spacing:-.5px}
    .brand-mark{width:34px;height:34px;border-radius:11px;background:var(--blue);position:relative;flex:none;box-shadow:0 7px 15px rgba(54,120,232,.24)}
    .brand-mark:after,.brand-mark:before{content:"";position:absolute;border:2px solid #fff;border-radius:50%}
    .brand-mark:before{width:12px;height:12px;left:7px;top:6px}
    .brand-mark:after{width:7px;height:7px;right:6px;bottom:6px}
    .nav-title{padding:0 12px 9px;color:#9aaabd;font-size:11px;letter-spacing:1.5px}
    .side-nav{display:grid;gap:7px}
    .side-nav a{display:flex;align-items:center;gap:12px;padding:12px;border-radius:12px;color:var(--muted);font-weight:650}
    .side-nav a:hover{background:var(--sky);color:var(--blue)}
    .side-nav a.active{color:var(--blue-deep);background:var(--sky);box-shadow:inset 3px 0 var(--blue)}
    .nav-dot{width:8px;height:8px;border-radius:50%;background:#b9c8d9}
    .active .nav-dot{background:var(--blue);box-shadow:0 0 0 4px #d8e8ff}
    .side-note{margin-top:auto;padding:17px 15px;border:1px solid var(--line);border-radius:15px;background:#f7fbff;color:var(--muted);font-size:12px}
    .side-note strong{display:block;color:var(--ink);font-size:13px;margin-bottom:5px}
    .main-area{margin-left:246px;min-height:100vh}
    .mobilebar{display:none}
    .container-wide{width:min(1160px,calc(100% - 72px));margin:auto}
    .section{padding:78px 0}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue-deep);font-size:12px;font-weight:800;letter-spacing:1.2px}
    .eyebrow:before{content:"";width:22px;height:2px;background:var(--blue);border-radius:3px}
    .lead{color:var(--muted);font-size:17px;max-width:680px;margin:19px 0 0}
    .hero{padding:57px 0 62px;background:#f6faff;border-bottom:1px solid var(--line);position:relative;overflow:hidden}
    .hero:after{content:"";position:absolute;width:370px;height:370px;border:1px solid #d5e6fb;border-radius:50%;right:-120px;top:-170px;box-shadow:0 0 0 32px #f2f8ff,0 0 0 64px #f7fbff}
    .hero-inner{position:relative;z-index:1}
    .breadcrumb{font-size:13px;color:#8495a9;margin-bottom:30px}
    .breadcrumb a{color:var(--blue-deep)}
    .hero-line{display:flex;justify-content:space-between;align-items:end;gap:40px}
    .hero-copy{max-width:760px}
    .hero-badge{display:inline-flex;padding:7px 12px;border-radius:30px;background:#e3f4f3;color:#18766f;font-size:12px;font-weight:750}
    .hero-aside{min-width:220px;padding:20px;border:1px solid #cfe1f7;background:#fff;border-radius:17px;box-shadow:var(--shadow)}
    .hero-aside small{display:block;color:#8a9aae;margin-bottom:5px}
    .hero-aside strong{font-size:26px;color:var(--blue-deep)}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:28px}
    .section-head p{margin:0;color:var(--muted);max-width:520px}
    .filter-panel{padding:23px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow)}
    .filter-panel .form-label{font-size:12px;font-weight:800;color:#53677e;margin-bottom:7px}
    .form-control,.form-select{border:1px solid #ccdceb;border-radius:10px;min-height:46px;color:var(--ink);box-shadow:none}
    .form-control::placeholder{color:#a4b1c1}
    .form-control:focus,.form-select:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(54,120,232,.11)}
    .btn-main,.btn-sub{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 21px;border-radius:12px;font-weight:750;border:1px solid transparent;transition:var(--ease)}
    .btn-main{background:var(--blue);color:#fff;box-shadow:0 9px 18px rgba(54,120,232,.2)}
    .btn-main:hover{background:var(--blue-deep);color:#fff;transform:translateY(-2px);box-shadow:0 12px 22px rgba(36,91,192,.25)}
    .btn-main:active,.btn-sub:active{transform:translateY(1px)}
    .btn-sub{background:#fff;border-color:#cbdced;color:var(--blue-deep)}
    .btn-sub:hover{border-color:var(--blue);background:var(--sky);color:var(--blue-deep)}
    .result-layout{display:grid;grid-template-columns:minmax(0,1.45fr) 290px;gap:24px;align-items:start}
    .result-list{display:grid;gap:14px}
    .result-card{display:grid;grid-template-columns:92px minmax(0,1fr) auto;gap:20px;align-items:center;padding:20px;border:1px solid var(--line);border-radius:17px;background:#fff;box-shadow:0 8px 24px rgba(41,76,126,.06);transition:var(--ease)}
    .result-card:hover{transform:translateY(-3px);border-color:#b8d2f5;box-shadow:var(--shadow)}
    .result-card.featured{background:#eaf3ff;border-color:#c7dcf7}
    .result-icon{width:92px;height:76px;border-radius:14px;background:#d9eaff;display:grid;place-items:center;color:var(--blue-deep);font-size:28px;position:relative;overflow:hidden}
    .result-icon:after{content:"";position:absolute;width:80px;height:80px;border:1px solid #9fc3f4;border-radius:50%;right:-28px;bottom:-35px}
    .result-card h3{font-size:18px;margin:8px 0 6px}
    .result-card p{color:var(--muted);font-size:13px;margin:0;max-width:570px}
    .meta{display:flex;flex-wrap:wrap;gap:8px;color:#8797aa;font-size:12px}
    .tag{display:inline-block;padding:4px 9px;border-radius:20px;background:var(--sky);color:var(--blue-deep);font-size:11px;font-weight:750}
    .tag.green{background:var(--cyan);color:#177b75}
    .tag.purple{background:var(--violet);color:#6552ad}
    .side-panel{padding:24px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow)}
    .side-panel h3{font-size:17px;margin-bottom:15px}
    .topic-list{list-style:none;padding:0;margin:0}
    .topic-list li{border-bottom:1px solid var(--line)}
    .topic-list li:last-child{border-bottom:0}
    .topic-list a{display:flex;justify-content:space-between;padding:12px 0;color:var(--muted);font-size:13px}
    .topic-list a:hover{color:var(--blue)}
    .topic-list span{color:#9bacbe}
    .note-box{margin-top:20px;padding:17px;border-radius:14px;background:#f2f8ff;color:var(--muted);font-size:13px}
    .note-box strong{display:block;color:var(--ink);margin-bottom:5px}
    .section-soft{background:#f0f6fc;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
    .rail{display:flex;gap:16px;overflow:auto;padding:3px 3px 12px;scrollbar-color:#b7cde8 transparent}
    .theme-card{min-width:260px;padding:23px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:var(--shadow);transition:var(--ease)}
    .theme-card:hover{transform:translateY(-4px);border-color:#b8d2f5}
    .theme-card:nth-child(2){background:#f0fbfa}
    .theme-card:nth-child(3){background:#f3f0ff}
    .theme-symbol{width:39px;height:39px;border-radius:12px;display:grid;place-items:center;background:var(--sky);color:var(--blue);font-weight:800;margin-bottom:24px}
    .theme-card h3{font-size:18px;margin-bottom:8px}
    .theme-card p{color:var(--muted);font-size:13px;margin:0 0 18px}
    .accordion-item{border:1px solid var(--line)!important;margin-bottom:10px;border-radius:13px!important;overflow:hidden;background:#fff}
    .accordion-button{font-weight:750;color:var(--ink);background:#fff;box-shadow:none!important;padding:19px 22px}
    .accordion-button:not(.collapsed){color:var(--blue-deep);background:var(--sky)}
    .accordion-body{color:var(--muted);padding:0 22px 20px}
    .cta{background:#eaf3ff;border:1px solid #cfe2fa;border-radius:25px;padding:38px}
    .cta-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:35px;align-items:center}
    .cta p{color:var(--muted);margin:14px 0 0}
    .cta-actions{display:flex;justify-content:flex-end;gap:12px;flex-wrap:wrap}
    .footer{background:#edf3f9;border-top:1px solid var(--line);padding:35px 0;color:var(--muted)}
    .footer-grid{display:flex;justify-content:space-between;gap:30px}
    .footer-brand{color:var(--ink);font-weight:800;font-size:16px}
    .copyright{display:block;color:#8495a8;font-weight:400;font-size:12px;margin-top:7px}
    .footer-links{display:flex;gap:22px;flex-wrap:wrap}
    .footer-links a{font-size:13px}
    .footer-links a:hover{color:var(--blue)}
    .empty-state{display:none;margin-top:14px;padding:18px;border:1px dashed #b9cde4;border-radius:14px;text-align:center;color:var(--muted);background:#f8fbff}
    @media(max-width:1050px){
      .sidebar{width:215px}.main-area{margin-left:215px}
      .container-wide{width:min(100% - 42px,960px)}
      .result-layout{grid-template-columns:1fr}
      .side-panel{display:grid;grid-template-columns:1fr 1fr;gap:18px}.note-box{margin-top:0}
    }
    @media(max-width:768px){
      .sidebar{display:none}.main-area{margin-left:0}
      .mobilebar{display:flex;position:sticky;top:0;z-index:30;align-items:center;justify-content:space-between;padding:13px 18px;background:#fff;border-bottom:1px solid var(--line)}
      .mobile-brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:15px}
      .mobile-brand .brand-mark{width:29px;height:29px;border-radius:9px}
      .mobile-brand .brand-mark:before{width:10px;height:10px;left:6px;top:5px}.mobile-brand .brand-mark:after{width:6px;height:6px;right:5px;bottom:5px}
      .menu-btn{border:1px solid var(--line);background:#fff;color:var(--blue-deep);border-radius:10px;width:42px;height:42px}
      .mobile-menu{display:none;padding:8px 18px 16px;background:#fff;border-bottom:1px solid var(--line)}
      .mobile-menu.show{display:grid;gap:5px}
      .mobile-menu a{padding:10px 12px;border-radius:10px;color:var(--muted)}.mobile-menu a.active{background:var(--sky);color:var(--blue-deep)}
      .container-wide{width:calc(100% - 36px)}
      .hero{padding:38px 0 44px}.hero-line{display:block}.hero-aside{margin-top:25px}
      .section{padding:58px 0}.section-head{display:block}.section-head p{margin-top:12px}
      .result-card{grid-template-columns:62px minmax(0,1fr);gap:14px}.result-icon{width:62px;height:62px;font-size:22px}.result-card .btn-sub{grid-column:2;justify-self:start;min-height:40px}
      .side-panel{grid-template-columns:1fr}.cta-grid{grid-template-columns:1fr}.cta-actions{justify-content:flex-start}
      .footer-grid{display:block}.footer-links{margin-top:20px}
    }
    @media(max-width:520px){
      h1{font-size:34px}.lead{font-size:15px}.filter-panel{padding:17px}
      .result-card{padding:15px}.result-card h3{font-size:16px}.meta{font-size:11px}
      .cta{padding:25px 19px}.cta-actions .btn-main,.cta-actions .btn-sub{width:100%}
    }