/* roulang page: index */
:root{
      --blue:#3568d4;--blue-dark:#244eaa;--ink:#17243b;--text:#475569;--muted:#718096;
      --teal:#43b7b1;--amber:#f3c66b;--bg:#f7f9fc;--pale:#eef4fa;--white:#fff;
      --line:#dce5f0;--radius:20px;--shadow:0 12px 36px rgba(35,69,118,.1);
      --container:1200px
    }
    *,*:before,*:after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--bg);color:var(--text);font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;font-size:16px;line-height:1.75}
    a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,transform .2s ease,box-shadow .2s ease}
    a:hover{color:var(--blue)}
    img{max-width:100%;display:block}
    button,input{font:inherit}
    button{cursor:pointer}
    :focus-visible{outline:3px solid rgba(67,183,177,.65);outline-offset:3px}
    .container{width:min(var(--container),calc(100% - 44px));margin:auto}
    .site-header{position:absolute;z-index:10;top:22px;left:0;right:0}
    .nav-pill{min-height:68px;border:1px solid rgba(220,229,240,.95);border-radius:36px;background:rgba(255,255,255,.94);box-shadow:0 10px 30px rgba(35,69,118,.1);display:flex;align-items:center;padding:10px 12px 10px 20px}
    .brand{display:flex;align-items:center;gap:11px;color:var(--ink);font-weight:800;letter-spacing:-.03em;min-width:0}
    .brand-mark{width:34px;height:34px;border-radius:11px;background:var(--blue);position:relative;flex:0 0 auto}
    .brand-mark:after{content:"";position:absolute;left:9px;top:8px;width:16px;height:16px;border:3px solid #fff;border-left-color:transparent;border-radius:50%}
    .brand-name{white-space:normal;line-height:1.25}
    .nav-links{display:flex;gap:5px;margin-left:auto;margin-right:18px}
    .nav-links a{padding:9px 15px;border-radius:13px;color:var(--muted);font-size:15px}
    .nav-links a:hover,.nav-links a.active{background:#edf3ff;color:var(--blue);font-weight:700}
    .nav-links a.active:after{content:"";display:inline-block;width:5px;height:5px;background:var(--teal);border-radius:50%;margin:0 0 3px 7px}
    .button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:10px 20px;border-radius:13px;border:1px solid transparent;font-weight:700;line-height:1.25;transition:.2s ease}
    .button.primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(53,104,212,.2)}
    .button.primary:hover{background:var(--blue-dark);color:#fff;transform:translateY(-2px)}
    .button.secondary{background:#fff;color:var(--blue);border-color:#b9ccec}
    .button.secondary:hover{background:#edf3ff;transform:translateY(-2px)}
    .button:active{transform:translateY(1px)}
    .menu-toggle{display:none;background:#edf3ff;color:var(--blue);border:0;border-radius:11px;padding:9px 12px}
    .hero{position:relative;min-height:690px;padding:170px 0 90px;overflow:hidden;background:#f4f8fd}
    .hero:before,.hero:after{content:"";position:absolute;border-radius:50%;filter:blur(2px);pointer-events:none}
    .hero:before{width:500px;height:500px;right:-130px;top:30px;background:radial-gradient(circle,rgba(67,183,177,.16),transparent 68%)}
    .hero:after{width:520px;height:420px;left:-180px;bottom:-220px;background:radial-gradient(circle,rgba(53,104,212,.14),transparent 70%)}
    .hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:54px;align-items:center;position:relative;z-index:1}
    .eyebrow,.badge{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:13px;font-weight:800;letter-spacing:.08em}
    .eyebrow:before{content:"";width:9px;height:9px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 5px rgba(67,183,177,.13)}
    h1,h2,h3{color:var(--ink);margin:0 0 18px;line-height:1.2;letter-spacing:-.04em}
    h1{font-size:clamp(40px,5vw,62px);max-width:680px}
    h2{font-size:clamp(30px,3.5vw,42px)}
    h3{font-size:21px}
    .hero-copy p{font-size:18px;max-width:650px;color:var(--text);margin:0 0 28px}
    .actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:25px}
    .hero-points{display:flex;flex-wrap:wrap;gap:17px;color:var(--muted);font-size:14px}
    .hero-points span:before{content:"✓";color:var(--teal);font-weight:900;margin-right:7px}
    .video-stage{height:390px;border-radius:28px;background:#dce8f5;position:relative;overflow:hidden;box-shadow:var(--shadow);border:8px solid #fff}
    .video-stage:before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(53,104,212,.85),rgba(67,183,177,.38) 55%,rgba(255,255,255,.25)),repeating-linear-gradient(115deg,transparent 0 32px,rgba(255,255,255,.14) 33px 35px)}
    .stage-lines{position:absolute;left:26px;right:26px;bottom:27px;display:grid;gap:10px}
    .stage-lines span{height:8px;border-radius:9px;background:rgba(255,255,255,.65)}
    .stage-lines span:nth-child(2){width:70%}.stage-lines span:nth-child(3){width:45%}
    .play{position:absolute;left:50%;top:43%;transform:translate(-50%,-50%);width:74px;height:74px;border:0;border-radius:50%;background:#fff;color:var(--blue);box-shadow:0 8px 25px rgba(23,36,59,.18);font-size:25px;padding-left:5px}
    .stage-label{position:absolute;top:24px;left:25px;color:#fff;font-size:13px;font-weight:700;letter-spacing:.08em}
    section{padding:100px 0}
    .section-head{max-width:690px;margin-bottom:40px}
    .section-head p{margin:0;color:var(--muted);font-size:17px}
    .pain{background:#fff}
    .pain-grid{display:grid;grid-template-columns:4fr 8fr;gap:50px}
    .index-list{border-left:2px solid #dbe7f4;padding-left:22px}
    .index-list li{list-style:none;position:relative;margin:0 0 25px;color:var(--muted)}
    .index-list li:before{content:"";position:absolute;left:-30px;top:9px;width:14px;height:14px;border:3px solid var(--teal);background:#fff;border-radius:50%}
    .index-list strong{display:block;color:var(--ink);font-size:17px}
    .problem-panel{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .problem-card,.content-card,.side-card,.quote-card,.faq-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
    .problem-card{padding:25px}.problem-card p{margin:0;color:var(--muted);font-size:15px}
    .number{display:block;color:var(--teal);font-weight:800;font-size:13px;margin-bottom:12px}
    .catalog{background:var(--pale)}
    .catalog-panel{background:#fff;border:1px solid var(--line);border-radius:26px;padding:32px;box-shadow:var(--shadow)}
    .path{display:flex;gap:0;list-style:none;margin:0;padding:0;counter-reset:step}
    .path li{flex:1;position:relative;padding:0 22px 0 47px;counter-increment:step}
    .path li:not(:last-child):after{content:"";position:absolute;left:31px;right:0;top:18px;border-top:1px dashed #b8cde8}
    .path li:before{content:counter(step,decimal-leading-zero);position:absolute;left:0;top:0;width:36px;height:36px;border-radius:11px;background:#edf3ff;color:var(--blue);display:grid;place-items:center;font-size:12px;font-weight:800;z-index:1}
    .path h3{font-size:18px;margin:0 0 8px}.path p{font-size:14px;color:var(--muted);margin:0;position:relative;z-index:2}
    .tag-row{display:flex;flex-wrap:wrap;gap:9px;margin-top:30px}.tag{padding:6px 12px;border-radius:20px;background:#edf7f7;color:#268c88;font-size:13px;font-weight:700}
    .related{background:#fff}.related-grid{display:grid;grid-template-columns:5fr 7fr;gap:18px}
    .feature-card{min-height:280px;padding:31px;border-radius:24px;background:linear-gradient(145deg,#e8f1ff,#fff);border:1px solid #d4e1f2;position:relative;overflow:hidden}
    .feature-card:after{content:"";position:absolute;width:180px;height:180px;right:-45px;bottom:-50px;border-radius:50%;border:25px solid rgba(67,183,177,.18)}
    .feature-card p,.content-card p{color:var(--muted);margin:0 0 22px;font-size:15px}
    .arrow-link{color:var(--blue);font-weight:800}.arrow-link span{margin-left:7px}
    .card-stack{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.content-card{padding:23px;box-shadow:none}.content-card:hover,.problem-card:hover,.side-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .updates{background:var(--bg)}.update-layout{display:grid;grid-template-columns:8fr 4fr;gap:30px}
    .update-list{background:#fff;border:1px solid var(--line);border-radius:22px;overflow:hidden}
    .update-item{display:flex;align-items:center;gap:18px;padding:20px 24px;border-bottom:1px solid var(--line)}
    .update-item:last-child{border:0}.update-item strong{color:var(--ink);display:block}.update-item small{color:var(--muted)}
    .status{margin-left:auto;white-space:nowrap;color:#268c88;background:#e8f7f5;border-radius:20px;padding:5px 10px;font-size:12px;font-weight:700}
    .side-card{padding:26px}.metric{font-size:30px;color:var(--blue);font-weight:800;display:block}.side-card p{color:var(--muted);margin:5px 0 20px;font-size:14px}
    .preview{background:#fff}.preview-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.reward{padding:25px;border-radius:18px;background:#f7f9fc;border:1px solid var(--line);position:relative}.reward em{font-style:normal;color:var(--amber);font-size:27px}.reward p{margin:8px 0;color:var(--muted);font-size:14px}.progress{height:7px;background:#e3ebf4;border-radius:10px;overflow:hidden}.progress i{display:block;height:100%;background:var(--teal);border-radius:inherit}.timeline{background:var(--pale)}.timeline-row{display:grid;grid-template-columns:1fr 3fr 2fr;gap:20px;align-items:center;padding:22px 0;border-bottom:1px solid #d4e1ef}.timeline-row:last-child{border:0}.time{color:var(--blue);font-weight:800}.timeline-row p{margin:0;color:var(--muted)}.faq{background:#fff}.faq-wrap{padding:10px 28px;box-shadow:none}.accordion{margin:0;background:transparent}.accordion-title{border:0;border-bottom:1px solid var(--line);padding:21px 35px 21px 0;color:var(--ink);font-weight:700;background:transparent;position:relative}.accordion-title:before{border-color:var(--blue);right:7px}.accordion-content{border:0;border-bottom:1px solid var(--line);padding:0 0 21px;color:var(--muted);font-size:15px}.accordion-item:last-child .accordion-title{border:0}.cta{padding:58px 0}.cta-panel{background:#e5f0ff;border:1px solid #cbdcf3;border-radius:26px;padding:36px 42px;display:flex;align-items:center;justify-content:space-between;gap:25px}.cta-panel h2{font-size:30px;margin-bottom:8px}.cta-panel p{margin:0;color:var(--muted)}footer{background:#17243b;color:#dce5f0;padding:48px 0 25px}.footer-grid{display:flex;justify-content:space-between;gap:30px}.footer-brand{color:#fff}.footer-brand p{max-width:400px;color:#aebbd0;font-size:14px}.footer-links{display:flex;gap:22px;align-items:center}.footer-links a{color:#dce5f0;font-size:14px}.footer-links a:hover{color:#fff}.copyright{border-top:1px solid rgba(255,255,255,.12);margin-top:35px;padding-top:20px;color:#91a1ba;font-size:13px}
    @media(max-width:900px){.hero-grid,.pain-grid,.related-grid,.update-layout{grid-template-columns:1fr}.hero{padding-top:140px}.video-stage{height:320px}.path{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}.path li:not(:last-child):after{display:none}}
    @media(max-width:639px){.container{width:min(100% - 36px,var(--container))}.site-header{top:12px}.nav-pill{min-height:58px;padding:8px 10px 8px 14px}.brand-name{font-size:13px}.brand-mark{width:30px;height:30px}.nav-links{display:none;position:absolute;top:68px;left:0;right:0;margin:0;padding:10px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);flex-direction:column}.nav-links.open{display:flex}.nav-links a{min-height:44px}.nav-pill>.button{display:none}.menu-toggle{display:block;margin-left:auto;min-height:42px}.hero{min-height:650px;padding:125px 0 55px}.hero-grid{gap:34px}.hero-copy p{font-size:16px}.actions .button{flex:1 1 150px}.video-stage{height:245px;border-radius:20px}.play{width:62px;height:62px}section{padding:62px 0}.section-head{margin-bottom:27px}.section-head p{font-size:16px}.problem-panel,.card-stack,.preview-grid{grid-template-columns:1fr}.pain-grid{gap:28px}.catalog-panel{padding:24px 18px}.path{grid-template-columns:1fr;gap:25px}.path li{min-height:55px}.update-item{padding:17px 16px;gap:10px;align-items:flex-start}.status{font-size:11px}.timeline-row{grid-template-columns:1fr;gap:4px}.cta-panel{padding:28px 23px;display:block}.cta-panel .button{margin-top:22px;width:100%}.footer-grid{display:block}.footer-links{margin-top:22px;flex-wrap:wrap}.copyright{margin-top:25px}}
    @media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}

/* roulang page: category1 */
:root{
 --blue:#3568d4;
 --blue-dark:#244eaa;
 --ink:#17243b;
 --text:#475569;
 --muted:#718096;
 --teal:#43b7b1;
 --amber:#f3c66b;
 --bg:#f7f9fc;
 --pale:#eef4fa;
 --white:#fff;
 --line:#dce5f0;
 --radius:20px;
 --radius-small:14px;
 --shadow:0 12px 36px rgba(35,69,118,.10);
 --shadow-hover:0 18px 44px rgba(35,69,118,.15);
 --container:1200px;
 --section-space:96px
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
 margin:0;
 overflow-x:hidden;
 background:var(--bg);
 color:var(--text);
 font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
 font-size:16px;
 line-height:1.75;
 -webkit-font-smoothing:antialiased
}
body.menu-open{overflow:hidden}
h1,h2,h3,h4,p,ul,ol{margin-top:0}
h1,h2,h3,h4{color:var(--ink);font-weight:800;letter-spacing:-.035em}
h1{font-size:clamp(38px,5vw,58px);line-height:1.15;margin-bottom:22px}
h2{font-size:clamp(30px,3.4vw,40px);line-height:1.22;margin-bottom:16px}
h3{font-size:22px;line-height:1.4;margin-bottom:12px}
p{margin-bottom:1.25rem}
a{
 color:inherit;
 text-decoration:none;
 transition:color .2s ease,background-color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease
}
a:hover{color:var(--blue)}
img{display:block;max-width:100%;height:auto}
button,input{font:inherit}
button{cursor:pointer}
button:disabled{cursor:not-allowed;opacity:.55}
ul{padding-left:0}
::selection{background:#dbe7ff;color:var(--ink)}
.container{width:min(var(--container),calc(100% - 44px));margin-inline:auto}
.skip-link{
 position:fixed;
 top:8px;
 left:8px;
 z-index:100;
 padding:10px 16px;
 border-radius:10px;
 background:var(--ink);
 color:#fff;
 transform:translateY(-150%)
}
.skip-link:focus{transform:none;color:#fff}
.site-header{position:absolute;z-index:20;top:22px;left:0;right:0}
.nav-pill{
 min-height:68px;
 border:1px solid rgba(220,229,240,.95);
 border-radius:36px;
 background:rgba(255,255,255,.94);
 box-shadow:0 10px 30px rgba(35,69,118,.10);
 display:flex;
 align-items:center;
 padding:10px 12px 10px 20px;
 backdrop-filter:blur(12px)
}
.brand{
 display:flex;
 align-items:center;
 gap:11px;
 min-width:0;
 color:var(--ink);
 font-weight:800;
 letter-spacing:-.03em
}
.brand:hover{color:var(--blue)}
.brand-mark{
 width:34px;
 height:34px;
 position:relative;
 flex:0 0 auto;
 border-radius:11px;
 background:var(--blue);
 box-shadow:0 6px 14px rgba(53,104,212,.2)
}
.brand-mark::after{
 content:"";
 position:absolute;
 left:9px;
 top:8px;
 width:16px;
 height:16px;
 border:3px solid #fff;
 border-left-color:transparent;
 border-radius:50%
}
.brand-name{white-space:normal;line-height:1.25;overflow-wrap:anywhere}
.nav-links{display:flex;gap:5px;margin-left:auto;margin-right:18px}
.nav-links a{
 min-height:44px;
 display:inline-flex;
 align-items:center;
 padding:9px 15px;
 border-radius:13px;
 color:var(--muted);
 font-size:15px
}
.nav-links a:hover,.nav-links a.active{background:#edf3ff;color:var(--blue);font-weight:700}
.nav-links a.active::after{
 content:"";
 display:inline-block;
 width:5px;
 height:5px;
 margin:0 0 3px 7px;
 border-radius:50%;
 background:var(--teal)
}
.button{
 display:inline-flex;
 align-items:center;
 justify-content:center;
 min-height:46px;
 margin:0;
 padding:10px 20px;
 border:1px solid transparent;
 border-radius:13px;
 font-weight:700;
 line-height:1.25;
 white-space:normal;
 text-align:center;
 transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease
}
.button.primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(53,104,212,.2)}
.button.primary:hover{background:var(--blue-dark);color:#fff;transform:translateY(-2px)}
.button.secondary{background:#fff;color:var(--blue);border-color:#b9ccec}
.button.secondary:hover{background:#edf3ff;color:var(--blue-dark);transform:translateY(-2px)}
.button:active{transform:translateY(1px)}
.button.compact{min-height:42px;padding:9px 17px;font-size:14px}
.menu-toggle{
 display:none;
 min-width:52px;
 min-height:44px;
 padding:9px 12px;
 border:0;
 border-radius:11px;
 background:#edf3ff;
 color:var(--blue);
 font-weight:800
}
a:focus-visible,button:focus-visible,.accordion-title:focus-visible{
 outline:3px solid rgba(67,183,177,.42);
 outline-offset:3px
}
.category-hero{
 position:relative;
 overflow:hidden;
 padding:154px 0 74px;
 background:
 radial-gradient(circle at 85% 22%,rgba(67,183,177,.14),transparent 28%),
 linear-gradient(180deg,#f2f7fd 0%,#f7f9fc 100%)
}
.category-hero::before{
 content:"";
 position:absolute;
 width:420px;
 height:420px;
 left:-230px;
 bottom:-260px;
 border:64px solid rgba(53,104,212,.06);
 border-radius:50%
}
.breadcrumbs{
 display:flex;
 flex-wrap:wrap;
 align-items:center;
 gap:9px;
 margin:0 0 28px;
 color:var(--muted);
 font-size:14px
}
.breadcrumbs a{color:var(--blue);font-weight:700}
.breadcrumbs .separator{color:#a8b5c7}
.hero-layout{position:relative;z-index:1;align-items:center}
.hero-summary{max-width:720px;font-size:18px;color:var(--text);margin-bottom:28px}
.eyebrow,.badge{
 display:inline-flex;
 align-items:center;
 gap:8px;
 color:var(--blue);
 font-size:13px;
 font-weight:800;
 letter-spacing:.06em
}
.eyebrow{margin-bottom:17px}
.eyebrow::before{
 content:"";
 width:9px;
 height:9px;
 border-radius:50%;
 background:var(--teal);
 box-shadow:0 0 0 5px rgba(67,183,177,.13)
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.invite-panel{
 position:relative;
 overflow:hidden;
 padding:28px;
 border:1px solid var(--line);
 border-radius:24px;
 background:#fff;
 box-shadow:var(--shadow)
}
.invite-panel::after{
 content:"";
 position:absolute;
 right:-42px;
 top:-48px;
 width:150px;
 height:150px;
 border:24px solid rgba(67,183,177,.12);
 border-radius:50%
}
.invite-label{display:flex;align-items:center;gap:9px;color:var(--teal);font-size:13px;font-weight:800}
.invite-label::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--teal)}
.invite-panel h2{font-size:25px;margin:14px 0 9px}
.invite-panel p{position:relative;z-index:1;color:var(--muted);font-size:15px;margin-bottom:20px}
.progress-copy{display:flex;justify-content:space-between;gap:16px;margin-bottom:8px;color:var(--muted);font-size:13px}
.progress{
 height:9px;
 margin:0 0 19px;
 overflow:hidden;
 border-radius:20px;
 background:#e7eef7
}
.progress-meter{width:66%;border-radius:20px;background:linear-gradient(90deg,var(--blue),var(--teal))}
.invite-note{margin-top:13px!important;margin-bottom:0!important;font-size:13px!important}
section{padding:var(--section-space) 0}
.section-head{max-width:740px;margin-bottom:40px}
.section-head p{margin:0;color:var(--muted);font-size:17px}
.section-kicker{
 display:inline-flex;
 align-items:center;
 gap:8px;
 margin-bottom:12px;
 color:var(--blue);
 font-size:13px;
 font-weight:800;
 letter-spacing:.08em
}
.section-kicker::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--teal)}
.filter-bar{
 display:flex;
 flex-wrap:wrap;
 align-items:center;
 gap:10px;
 margin-bottom:28px;
 padding:13px;
 border:1px solid var(--line);
 border-radius:18px;
 background:#fff
}
.filter-label{margin:0 5px;color:var(--muted);font-size:14px;font-weight:700}
.filter-chip{
 min-height:40px;
 display:inline-flex;
 align-items:center;
 padding:7px 14px;
 border:1px solid transparent;
 border-radius:999px;
 background:#f4f7fb;
 color:var(--muted);
 font-size:14px;
 font-weight:700
}
.filter-chip:hover,.filter-chip.active{border-color:#c9d9f1;background:#eaf1ff;color:var(--blue)}
.content-shell{align-items:flex-start}
.main-collection{display:grid;gap:20px}
.featured-card{
 display:grid;
 grid-template-columns:5fr 7fr;
 overflow:hidden;
 border:1px solid var(--line);
 border-radius:24px;
 background:#fff;
 box-shadow:var(--shadow)
}
.abstract-cover{
 position:relative;
 min-height:310px;
 overflow:hidden;
 background:
 linear-gradient(140deg,rgba(53,104,212,.94),rgba(67,183,177,.66)),
 repeating-linear-gradient(120deg,transparent 0 32px,rgba(255,255,255,.14) 33px 35px)
}
.abstract-cover::before,.abstract-cover::after{content:"";position:absolute;border:1px solid rgba(255,255,255,.46);border-radius:18px}
.abstract-cover::before{width:72%;height:54%;left:14%;top:15%}
.abstract-cover::after{width:52%;height:38%;left:24%;top:31%;background:rgba(255,255,255,.11)}
.cover-caption{
 position:absolute;
 left:24px;
 right:24px;
 bottom:23px;
 z-index:2;
 color:#fff;
 font-size:14px;
 font-weight:700
}
.featured-copy{padding:34px}
.featured-copy h3{font-size:29px;margin-top:15px}
.featured-copy p{color:var(--muted)}
.arrow-link{display:inline-flex;align-items:center;gap:9px;color:var(--blue);font-weight:800}
.arrow-link:hover{gap:13px;color:var(--blue-dark)}
.card-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.content-card{
 padding:26px;
 border:1px solid var(--line);
 border-radius:var(--radius);
 background:#fff;
 box-shadow:0 8px 24px rgba(35,69,118,.06);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease
}
.content-card:hover{transform:translateY(-4px);border-color:#c5d6ec;box-shadow:var(--shadow-hover)}
.card-index{
 display:flex;
 align-items:center;
 justify-content:center;
 width:42px;
 height:42px;
 margin-bottom:23px;
 border-radius:14px;
 background:#edf3ff;
 color:var(--blue);
 font-weight:900
}
.content-card p{color:var(--muted);font-size:15px}
.card-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.tag{
 display:inline-flex;
 align-items:center;
 min-height:30px;
 padding:4px 11px;
 border-radius:999px;
 background:#edf7f7;
 color:#268c88;
 font-size:13px;
 font-weight:700
}
.horizontal-list{
 overflow:hidden;
 border:1px solid var(--line);
 border-radius:22px;
 background:#fff;
 box-shadow:0 8px 24px rgba(35,69,118,.06)
}
.horizontal-item{
 display:grid;
 grid-template-columns:58px minmax(0,1fr) auto;
 align-items:center;
 gap:18px;
 min-height:106px;
 padding:20px 24px;
 border-bottom:1px solid var(--line)
}
.horizontal-item:last-child{border-bottom:0}
.item-icon{
 width:52px;
 height:52px;
 display:flex;
 align-items:center;
 justify-content:center;
 border-radius:16px;
 background:var(--pale);
 color:var(--blue);
 font-weight:900
}
.horizontal-item h3{font-size:18px;margin:0 0 3px}
.horizontal-item p{margin:0;color:var(--muted);font-size:14px}
.item-status{color:var(--teal);font-size:13px;font-weight:800;white-space:nowrap}
.side-column{position:sticky;top:22px}
.side-card{
 margin-bottom:18px;
 padding:25px;
 border:1px solid var(--line);
 border-radius:var(--radius);
 background:#fff;
 box-shadow:var(--shadow)
}
.side-card h2{font-size:22px;margin-bottom:8px}
.side-card p{color:var(--muted);font-size:14px}
.topic-nav{margin:20px 0 0;list-style:none}
.topic-nav li+li{border-top:1px solid var(--line)}
.topic-nav a{
 min-height:48px;
 display:flex;
 align-items:center;
 justify-content:space-between;
 gap:14px;
 padding:11px 4px;
 color:var(--text);
 font-weight:700
}
.topic-nav a::after{content:"→";color:var(--blue)}
.topic-nav a:hover{padding-left:7px;color:var(--blue)}
.quick-check{margin:18px 0 22px;list-style:none}
.quick-check li{
 position:relative;
 padding:10px 0 10px 29px;
 border-bottom:1px dashed var(--line);
 color:var(--text);
 font-size:14px
}
.quick-check li:last-child{border-bottom:0}
.quick-check li::before{
 content:"✓";
 position:absolute;
 left:0;
 top:10px;
 width:20px;
 height:20px;
 display:flex;
 align-items:center;
 justify-content:center;
 border-radius:50%;
 background:#e8f7f6;
 color:#268c88;
 font-size:12px;
 font-weight:900
}
.path-section{background:var(--pale)}
.path-panel{
 padding:34px;
 border:1px solid #d5e2f0;
 border-radius:26px;
 background:#fff;
 box-shadow:var(--shadow)
}
.path-track{display:grid;grid-template-columns:repeat(3,1fr);position:relative}
.path-track::before{
 content:"";
 position:absolute;
 left:12%;
 right:12%;
 top:25px;
 height:2px;
 background:#d6e3f2
}
.path-step{position:relative;z-index:1;padding:0 26px;text-align:left}
.step-number{
 width:52px;
 height:52px;
 display:flex;
 align-items:center;
 justify-content:center;
 margin-bottom:20px;
 border:6px solid #fff;
 border-radius:50%;
 background:var(--blue);
 color:#fff;
 box-shadow:0 0 0 1px #cad8eb;
 font-weight:900
}
.path-step:nth-child(2) .step-number{background:var(--teal)}
.path-step:nth-child(3) .step-number{background:var(--ink)}
.path-step h3{font-size:19px}
.path-step p{margin:0;color:var(--muted);font-size:14px}
.scenario-layout{align-items:center}
.scenario-visual{
 min-height:390px;
 position:relative;
 overflow:hidden;
 padding:34px;
 border-radius:26px;
 background:#dfeaf7;
 box-shadow:var(--shadow)
}
.scenario-visual::before{
 content:"";
 position:absolute;
 inset:0;
 background:
 radial-gradient(circle at 74% 24%,rgba(67,183,177,.48),transparent 27%),
 linear-gradient(145deg,rgba(53,104,212,.88),rgba(53,104,212,.16))
}
.visual-window{
 position:relative;
 z-index:1;
 min-height:260px;
 padding:24px;
 border:1px solid rgba(255,255,255,.7);
 border-radius:21px;
 background:rgba(255,255,255,.91);
 box-shadow:0 16px 36px rgba(23,36,59,.14)
}
.visual-top{display:flex;align-items:center;gap:7px;margin-bottom:25px}
.visual-top span{width:9px;height:9px;border-radius:50%;background:#b7c6da}
.visual-top span:first-child{background:var(--teal)}
.visual-line{height:10px;margin-bottom:13px;border-radius:10px;background:#dce6f2}
.visual-line.large{width:83%;height:15px;background:#bdd0ef}
.visual-line.medium{width:65%}
.visual-line.small{width:46%}
.visual-blocks{display:grid;grid-template-columns:1fr 1.4fr;gap:12px;margin-top:26px}
.visual-blocks span{height:76px;border-radius:14px;background:#edf3fb}
.visual-blocks span:last-child{background:#e6f5f4}
.scenario-copy{padding-left:28px}
.scenario-list{margin:26px 0 0;list-style:none}
.scenario-list li{
 display:grid;
 grid-template-columns:44px minmax(0,1fr);
 gap:15px;
 align-items:start;
 margin-bottom:18px
}
.scenario-list strong{display:block;color:var(--ink)}
.scenario-list p{margin:2px 0 0;color:var(--muted);font-size:14px}
.scenario-list .dot{
 width:40px;
 height:40px;
 display:flex;
 align-items:center;
 justify-content:center;
 border-radius:13px;
 background:#edf3ff;
 color:var(--blue);
 font-weight:900
}
.faq-section{padding-top:86px}
.faq-wrap{
 overflow:hidden;
 border:1px solid var(--line);
 border-radius:24px;
 background:#fff;
 box-shadow:var(--shadow)
}
.accordion{margin:0;background:transparent}
.accordion-item{border-bottom:1px solid var(--line)}
.accordion-item:last-child{border-bottom:0}
.accordion-title{
 min-height:68px;
 display:flex;
 align-items:center;
 padding:20px 64px 20px 24px;
 border:0!important;
 background:#fff;
 color:var(--ink);
 font-size:17px;
 font-weight:800;
 line-height:1.5
}
.accordion-title:hover,.accordion-title:focus{background:#f7faff;color:var(--blue)}
.accordion-title::before{
 right:24px;
 top:50%;
 width:28px;
 height:28px;
 margin-top:-14px;
 display:flex;
 align-items:center;
 justify-content:center;
 border-radius:50%;
 background:#edf3ff;
 color:var(--blue);
 content:"+";
 font-size:20px;
 line-height:1
}
.is-active>.accordion-title::before{content:"−";background:#e7f7f6;color:#268c88}
.accordion-content{
 padding:0 64px 23px 24px;
 border:0!important;
 background:#fff;
 color:var(--muted);
 line-height:1.8
}
.accordion-content p{margin:0}
.cta-section{padding-top:20px}
.cta-panel{
 position:relative;
 overflow:hidden;
 display:grid;
 grid-template-columns:minmax(0,1fr) auto;
 align-items:center;
 gap:36px;
 padding:42px 46px;
 border:1px solid #d3e1f2;
 border-radius:26px;
 background:#eaf2fc;
 box-shadow:var(--shadow)
}
.cta-panel::after{
 content:"";
 position:absolute;
 right:16%;
 bottom:-96px;
 width:190px;
 height:190px;
 border:28px solid rgba(67,183,177,.12);
 border-radius:50%
}
.cta-panel h2{font-size:31px;margin-bottom:8px}
.cta-panel p{margin:0;color:var(--muted)}
.cta-actions{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:11px}
.copy-feedback{margin-top:10px;color:#267f7b;font-size:13px;font-weight:700}
footer{margin-top:96px;padding:62px 0 28px;background:var(--ink);color:#dbe5f2}
footer .brand{color:#fff}
footer .brand-mark{background:var(--blue)}
.footer-grid{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:50px;align-items:start}
.footer-brand p{max-width:520px;margin:18px 0 0;color:#aebdd0}
.footer-links{display:flex;flex-wrap:wrap;gap:10px 24px}
.footer-links a{min-height:44px;display:flex;align-items:center;color:#dbe5f2}
.footer-links a:hover{color:#fff}
.copyright{
 margin-top:38px;
 padding-top:22px;
 border-top:1px solid rgba(220,229,240,.14);
 color:#92a3b9;
 font-size:14px
}
@media (max-width:1023px){
 :root{--section-space:76px}
 .nav-pill>.button{display:none}
 .category-hero{padding-top:142px}
 .invite-panel{margin-top:32px}
 .featured-card{grid-template-columns:1fr}
 .abstract-cover{min-height:260px}
 .side-column{position:static;margin-top:24px}
 .scenario-copy{padding:30px 0 0}
 .path-step{padding:0 14px}
}
@media (max-width:767px){
 .container{width:min(100% - 36px,var(--container))}
 .site-header{top:14px}
 .nav-pill{position:relative;min-height:62px;padding:8px 9px 8px 14px;border-radius:25px}
 .brand{max-width:calc(100% - 72px);font-size:14px}
 .brand-mark{width:31px;height:31px;border-radius:10px}
 .brand-mark::after{left:8px;top:7px}
 .menu-toggle{display:block;margin-left:auto;flex:0 0 auto}
 .nav-links{
  position:absolute;
  top:calc(100% + 10px);
  left:0;
  right:0;
  display:none;
  flex-direction:column;
  gap:4px;
  margin:0;
  padding:10px;
  border:1px solid var(--line);
  border-radius:19px;
  background:#fff;
  box-shadow:var(--shadow)
 }
 .nav-links.is-open{display:flex}
 .nav-links a{width:100%;min-height:48px;padding:12px 15px}
 .category-hero{padding:122px 0 56px}
 .breadcrumbs{margin-bottom:20px}
 .hero-summary{font-size:16px}
 .invite-panel{padding:23px}
 section{padding:58px 0}
 .section-head{margin-bottom:28px}
 .filter-bar{gap:8px;padding:10px}
 .filter-label{width:100%}
 .featured-copy{padding:25px}
 .featured-copy h3{font-size:24px}
 .card-pair{grid-template-columns:1fr}
 .horizontal-item{grid-template-columns:48px minmax(0,1fr);gap:13px;padding:18px}
 .item-icon{width:46px;height:46px}
 .item-status{grid-column:2}
 .path-panel{padding:26px 22px}
 .path-track{grid-template-columns:1fr;gap:28px}
 .path-track::before{left:25px;right:auto;top:25px;bottom:25px;width:2px;height:auto}
 .path-step{display:grid;grid-template-columns:52px minmax(0,1fr);column-gap:17px;padding:0}
 .step-number{grid-row:1/3;margin:0}
 .path-step h3{margin:1px 0 6px}
 .scenario-visual{min-height:320px;padding:22px}
 .visual-window{min-height:245px}
 .faq-section{padding-top:56px}
 .accordion-title{padding:18px 56px 18px 19px;font-size:16px}
 .accordion-title::before{right:18px}
 .accordion-content{padding:0 20px 20px}
 .cta-panel{grid-template-columns:1fr;padding:30px 24px}
 .cta-panel h2{font-size:27px}
 .cta-actions{width:100%}
 .cta-actions .button{width:100%}
 footer{margin-top:64px;padding-top:48px}
 .footer-grid{grid-template-columns:1fr}
}
@media (max-width:520px){
 .container{width:calc(100% - 36px)}
 h1{font-size:35px}
 h2{font-size:29px}
 .brand-name{font-size:13px}
 .hero-actions{flex-direction:column}
 .hero-actions .button{width:100%}
 .featured-copy{padding:22px}
 .abstract-cover{min-height:230px}
 .content-card{padding:22px}
 .side-card{padding:22px}
 .scenario-visual{min-height:285px}
 .visual-window{min-height:220px;padding:18px}
 .footer-links{flex-direction:column;gap:0}
}
@media (prefers-reduced-motion:reduce){
 html{scroll-behavior:auto}
 *,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}
}