/* roulang page: index */
:root{
  --brand:#2F6BD8; --brand-dark:#1B4AA8; --ink:#16324F; --body:#475467; --muted:#7A8798;
  --accent:#F2884B; --support:#2FA98C; --bg:#F7F9FC; --surface:#FFFFFF; --tint:#EFF4FB; --line:#DFE7F1;
  --radius:16px; --radius-sm:10px;
  --shadow:0 1px 2px rgba(22,50,79,.04), 0 10px 24px -14px rgba(22,50,79,.18);
  --shadow-hover:0 16px 32px -16px rgba(22,50,79,.26);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);font-size:16px;line-height:1.75;color:var(--body);background:var(--bg);-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:0}
h1{font-size:clamp(28px,3.6vw,46px);line-height:1.2}
h2{font-size:clamp(24px,2.4vw,32px);line-height:1.3}
h3{font-size:20px;line-height:1.4;font-weight:600}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:var(--brand);text-decoration:none;transition:color .18s ease-out}
a:hover{color:var(--brand-dark)}
img{max-width:100%;display:block}
button{font-family:inherit}
:focus-visible{outline:3px solid rgba(47,107,216,.35);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 24px}}
@media(min-width:1200px){.container{padding:0 32px}}

section{padding:56px 0}
@media(min-width:1024px){section{padding:80px 0}}
.sec-tint{background:var(--tint);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-white{background:var(--surface);border-top:1px solid var(--line)}
.sec-head{max-width:780px;margin-bottom:36px}
.sec-head p{margin-top:14px;font-size:16px;line-height:1.8;color:var(--body)}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{display:inline-block;margin-bottom:12px;font-size:13px;font-weight:600;letter-spacing:.02em;color:var(--brand);background:rgba(47,107,216,.08);border-radius:999px;padding:5px 12px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:12px 22px;border-radius:var(--radius-sm);border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .12s ease-out,box-shadow .18s ease-out}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px -12px rgba(47,107,216,.9)}
.btn-primary:hover{background:var(--brand-dark);color:#fff}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark);background:#fff}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{min-height:40px;padding:9px 16px;font-size:14px}
.btn-line{background:transparent;color:var(--brand);border-color:var(--brand);}
.btn-line:hover{background:var(--brand);color:#fff}

.topbar{background:var(--tint);border-bottom:1px solid var(--line);font-size:13px;color:var(--muted)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:36px}
.topbar a{font-size:13px;color:var(--brand);font-weight:500}
.topbar span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:saturate(140%) blur(6px)}
.nav-wrap{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:20px;min-height:74px}
.nav-left,.nav-right{display:flex;align-items:center;gap:26px}
.nav-right{justify-content:flex-end}
.nav-left a,.nav-right a{font-size:15px;font-weight:500;color:var(--ink);padding:10px 0;position:relative}
.nav-left a::after,.nav-right a:not(.btn)::after{content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .18s ease-out}
.nav-left a:hover,.nav-right a:not(.btn):hover{color:var(--brand)}
.nav-left a:hover::after,.nav-right a:not(.btn):hover::after{transform:scaleX(1)}
.nav-right a.is-active{color:var(--brand)}
.nav-right a.is-active::after{transform:scaleX(1)}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;font-size:17px;white-space:nowrap}
.logo:hover{color:var(--ink)}
.logo-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand-dark));color:#fff;font-size:14px;letter-spacing:1px}
.nav-toggle{display:none;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:#fff;color:var(--ink);cursor:pointer}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}
.mobile-panel{display:none;border-top:1px solid var(--line);background:#fff}
.mobile-panel.open{display:block}
.mobile-group{padding:16px 20px;border-bottom:1px solid var(--line)}
.mobile-group:last-child{border-bottom:0}
.mobile-group h4{font-size:13px;font-weight:600;color:var(--muted);margin-bottom:6px}
.mobile-group a{display:flex;align-items:center;min-height:48px;font-size:15px;font-weight:500;color:var(--ink)}
.mobile-group a:hover{color:var(--brand)}
@media(max-width:1023px){
  .nav-left,.nav-right{display:none}
  .nav-wrap{grid-template-columns:1fr auto;justify-items:start}
  .logo{grid-column:1}
  .nav-toggle{display:inline-flex;justify-self:end}
}

.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#FFFFFF 0%,var(--bg) 100%);padding:0}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.16}
.hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(22,50,79,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(22,50,79,.05) 1px,transparent 1px);background-size:64px 64px;pointer-events:none}
.hero-inner{position:relative;z-index:2;display:grid;gap:40px;padding:48px 20px 56px}
@media(min-width:768px){.hero-inner{padding:56px 24px 64px}}
@media(min-width:1024px){.hero-inner{grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;padding:76px 32px 84px}}
.hero h1{margin:14px 0 0}
.hero-sub{margin-top:16px;font-size:17px;font-weight:600;color:var(--ink);line-height:1.6}
.hero-desc{margin-top:16px;max-width:600px;font-size:16px;line-height:1.85;color:var(--body)}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:24px}
.hero-points li{position:relative;padding-left:18px;font-size:14px;color:var(--muted)}
.hero-points li::before{content:"";position:absolute;left:0;top:50%;width:7px;height:7px;margin-top:-3.5px;border-radius:50%;background:var(--support)}
.hero-visual{position:relative}
.hero-photo{margin:0;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);background:#fff}
.hero-photo img{width:100%;aspect-ratio:4/3;object-fit:cover}
.float-card{position:absolute;background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px 16px;box-shadow:var(--shadow-hover);display:flex;flex-direction:column;gap:2px}
.float-card strong{font-size:18px;color:var(--ink);line-height:1.2}
.float-card span{font-size:12px;color:var(--muted)}
.float-a{right:-10px;top:18px}
.float-b{left:-10px;bottom:20px}
@media(max-width:767px){.float-card{display:none}}

.download-band{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:0}
.dl-card{display:grid;gap:24px;padding:32px 24px;border-radius:var(--radius)}
@media(min-width:1024px){.dl-card{grid-template-columns:1.1fr 1.4fr .9fr;align-items:center;gap:32px;padding:36px 32px}}
.dl-card h2{font-size:22px}
.dl-card p{margin-top:8px;font-size:14px;color:var(--muted)}
.dl-buttons{display:grid;gap:12px}
@media(min-width:560px){.dl-buttons{grid-template-columns:repeat(3,1fr)}}
.dl-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;min-height:56px;padding:10px 12px;border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--tint);color:var(--ink);font-size:14px;font-weight:600;transition:all .18s ease-out}
.dl-btn small{font-size:12px;font-weight:400;color:var(--muted)}
.dl-btn:hover{background:var(--brand);border-color:var(--brand);color:#fff;transform:translateY(-2px)}
.dl-btn:hover small{color:rgba(255,255,255,.85)}
.dl-note{font-size:13px;line-height:1.7;color:var(--muted)}

.grid{display:grid;gap:20px}
.g2{grid-template-columns:1fr}
.g3{grid-template-columns:1fr}
.g4{grid-template-columns:1fr}
@media(min-width:640px){.g2,.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}}

.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#cfdcee}
.card h3{margin-bottom:8px}
.card p{font-size:14px;line-height:1.75;color:var(--body)}
.tag{display:inline-flex;align-items:center;padding:5px 12px;border-radius:999px;background:var(--tint);color:var(--brand);font-size:13px;font-weight:500}
.tag-support{background:#fff;border:1px solid var(--support);color:var(--support)}
.tag-accent{background:rgba(242,136,75,.1);color:#b95f24}

.stat-row{display:grid;gap:16px;grid-template-columns:repeat(2,1fr)}
@media(min-width:900px){.stat-row{grid-template-columns:repeat(5,1fr)}}
.stat{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:20px 18px 20px 22px;box-shadow:var(--shadow)}
.stat::before{content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:3px;background:var(--brand)}
.stat strong{display:block;font-size:24px;color:var(--ink);line-height:1.25}
.stat span{display:block;margin-top:6px;font-size:13px;color:var(--muted)}

.type-card{display:flex;flex-direction:column;gap:10px}
.type-icon{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;background:var(--tint);color:var(--brand);font-size:18px;font-weight:700}
.type-foot{margin-top:auto;padding-top:12px;border-top:1px dashed var(--line);display:flex;flex-wrap:wrap;gap:8px}

.compare{display:grid;gap:20px}
@media(min-width:900px){.compare{grid-template-columns:1fr 44px 1fr;align-items:stretch}}
.compare-col{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.compare-col h3{margin-bottom:16px;display:flex;align-items:center;gap:10px;font-size:18px}
.compare-col li{position:relative;padding-left:26px;margin-bottom:12px;font-size:15px;line-height:1.7}
.compare-col.bad li::before{content:"×";position:absolute;left:0;top:0;color:#b2bccb;font-weight:700}
.compare-col.good{border-color:rgba(47,107,216,.35)}
.compare-col.good li::before{content:"✓";position:absolute;left:0;top:0;color:var(--support);font-weight:700}
.compare-mid{display:none}
@media(min-width:900px){.compare-mid{display:grid;place-items:center;color:var(--line);font-size:22px}}

.timeline{position:relative;display:grid;gap:24px}
@media(min-width:900px){.timeline{grid-template-columns:repeat(6,1fr);gap:0}}
.timeline-line{display:none}
@media(min-width:900px){.timeline-line{display:block;position:absolute;top:13px;left:12px;right:12px;height:2px;background:var(--tint)}}
.tl-item{position:relative;padding-left:44px}
@media(min-width:900px){.tl-item{padding-left:0;padding-top:44px;padding-right:14px}}
.tl-num{position:absolute;left:0;top:0;display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--brand);color:#fff;font-size:13px;font-weight:700;box-shadow:0 0 0 4px #fff}
.tl-item h3{font-size:16px;margin-bottom:6px}
.tl-item p{font-size:14px;line-height:1.7;color:var(--body)}

.news-grid{display:grid;gap:20px}
@media(min-width:1024px){.news-grid{grid-template-columns:repeat(3,1fr)}}
.news-card{padding:0;overflow:hidden;display:flex;flex-direction:column}
.news-thumb{overflow:hidden;border-radius:14px 14px 0 0}
.news-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .3s ease-out}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--muted)}
.news-title{font-size:17px;line-height:1.5;color:var(--ink);font-weight:600;display:block}
.news-title:hover{color:var(--brand)}
.news-sum{font-size:14px;line-height:1.7;color:var(--body);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.empty-state{display:grid;place-items:center;gap:10px;min-height:180px;text-align:center;background:var(--surface);border:1px dashed var(--line);border-radius:var(--radius);padding:32px 20px;color:var(--muted)}

.guard-list{display:grid;gap:18px}
@media(min-width:768px){.guard-list{grid-template-columns:repeat(2,1fr)}}
.guard-item{display:flex;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:var(--shadow)}
.guard-icon{flex:0 0 40px;height:40px;border-radius:12px;display:grid;place-items:center;background:rgba(47,169,140,.1);color:var(--support);font-weight:700}
.guard-item h3{font-size:16px;margin-bottom:6px}
.guard-item p{font-size:14px;line-height:1.7}

.quick-grid{display:grid;gap:18px}
@media(min-width:768px){.quick-grid{grid-template-columns:repeat(3,1fr)}}
.quick-card{background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:14px;padding:20px;box-shadow:var(--shadow)}
.quick-card h3{font-size:16px;margin-bottom:8px}
.quick-card p{font-size:14px;line-height:1.7}
.quick-link{display:inline-flex;align-items:center;gap:6px;margin-top:12px;font-size:14px;font-weight:600}
.quick-link:hover{gap:10px}

.faq-wrap{max-width:860px;margin:0 auto;display:grid;gap:12px}
details.faq{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:0 20px;box-shadow:var(--shadow)}
details.faq summary{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:56px;padding:14px 0;cursor:pointer;font-size:16px;font-weight:600;color:var(--ink);list-style:none}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"+";flex:0 0 auto;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;background:var(--tint);color:var(--brand);font-size:16px;font-weight:700;transition:transform .18s ease-out}
details.faq[open] summary::after{transform:rotate(180deg);content:"−"}
details.faq .faq-body{padding:0 0 18px;font-size:15px;line-height:1.8;color:var(--body);border-top:1px solid var(--line);margin-top:2px;padding-top:14px}

.join-panel{background:var(--tint);border:1px solid var(--line);border-radius:22px;padding:28px 22px}
@media(min-width:1024px){.join-panel{display:grid;grid-template-columns:.85fr 1.15fr;gap:40px;padding:40px 36px;align-items:start}}
.join-copy h2{margin-bottom:14px}
.join-copy p{font-size:15px;line-height:1.8}
.join-copy ul{margin-top:18px;display:grid;gap:10px}
.join-copy li{position:relative;padding-left:22px;font-size:14px;color:var(--body)}
.join-copy li::before{content:"✓";position:absolute;left:0;top:0;color:var(--support);font-weight:700}
.join-form{margin-top:26px;display:grid;gap:16px;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px;box-shadow:var(--shadow)}
@media(min-width:1024px){.join-form{margin-top:0}}
.form-row{display:grid;gap:16px}
@media(min-width:640px){.form-row{grid-template-columns:1fr 1fr}}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-size:14px;font-weight:600;color:var(--ink)}
.field input,.field select{height:44px;padding:0 12px;border-radius:var(--radius-sm);border:1px solid var(--line);background:#fff;font-size:15px;color:var(--ink);font-family:inherit;transition:border-color .18s ease-out,box-shadow .18s ease-out}
.field input::placeholder{color:#a6b1c0}
.field input:focus,.field select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(47,107,216,.16)}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);background-position:calc(100% - 18px) 20px,calc(100% - 13px) 20px;background-size:5px 5px,5px 5px;background-repeat:no-repeat}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{position:relative;display:inline-flex;align-items:center}
.chip input{position:absolute;opacity:0;width:1px;height:1px}
.chip span{display:inline-flex;align-items:center;min-height:38px;padding:7px 14px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--body);font-size:14px;cursor:pointer;transition:all .18s ease-out}
.chip input:checked+span{background:rgba(47,107,216,.1);border-color:var(--brand);color:var(--brand-dark);font-weight:600}
.chip input:focus-visible+span{outline:3px solid rgba(47,107,216,.35);outline-offset:2px}
.form-tip{font-size:14px;color:#c2410c;min-height:20px}
.form-tip.ok{color:var(--support)}

.cat-card{display:flex;align-items:center;gap:20px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);transition:all .18s ease-out}
.cat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(47,107,216,.4)}
.cat-icon{flex:0 0 52px;height:52px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand-dark));color:#fff;font-size:20px;font-weight:700}
.cat-body{flex:1 1 auto;min-width:0}
.cat-body h3{font-size:18px;margin-bottom:6px;color:var(--ink)}
.cat-body p{font-size:14px;line-height:1.7}
.cat-arrow{flex:0 0 auto;color:var(--brand);font-size:20px;transition:transform .18s ease-out}
.cat-card:hover .cat-arrow{transform:translateX(4px)}

.scene-card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:22px;box-shadow:var(--shadow)}
.scene-card h3{font-size:16px;margin-bottom:8px}
.scene-card p{font-size:14px;line-height:1.7}
.scene-tags{margin-top:12px;display:flex;flex-wrap:wrap;gap:8px}

.city-grid{display:grid;gap:16px;grid-template-columns:repeat(2,1fr)}
@media(min-width:900px){.city-grid{grid-template-columns:repeat(3,1fr)}}
.city-card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px;box-shadow:var(--shadow)}
.city-card strong{display:block;font-size:17px;color:var(--ink);margin-bottom:6px}
.city-card span{font-size:13px;color:var(--muted);line-height:1.7}

.rules{display:grid;gap:24px}
@media(min-width:820px){.rules{grid-template-columns:1fr 1fr}}
.rules-col{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.rules-col h3{font-size:17px;margin-bottom:16px;display:flex;align-items:center;gap:10px}
.rules-col li{counter-increment:rule;position:relative;padding-left:34px;margin-bottom:12px;font-size:15px;line-height:1.7}
.rules-col ol{counter-reset:rule}
.rules-col li::before{content:counter(rule,decimal-leading-zero);position:absolute;left:0;top:1px;font-size:13px;font-weight:700;color:var(--brand);background:var(--tint);border-radius:8px;width:26px;height:22px;display:grid;place-items:center}

.footer{background:#fff;border-top:1px solid var(--line);padding:56px 0 0}
.footer-grid{display:grid;gap:32px}
@media(min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:28px}}
.footer h4{font-size:15px;margin-bottom:14px;color:var(--ink)}
.footer p{font-size:14px;line-height:1.75;color:var(--muted)}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;font-size:16px;margin-bottom:12px}
.footer li{margin-bottom:10px}
.footer li a{font-size:14px;color:var(--body)}
.footer li a:hover{color:var(--brand)}
.footer-bottom{margin-top:36px;border-top:1px solid var(--line);padding:18px 0;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:var(--muted)}

/* roulang page: article */
:root{
  --brand:#2F6BD8; --brand-dark:#1B4AA8; --ink:#16324F; --body:#475467; --muted:#7A8798;
  --accent:#F2884B; --support:#2FA98C; --bg:#F7F9FC; --surface:#FFFFFF; --tint:#EFF4FB; --line:#DFE7F1;
  --radius:16px; --radius-sm:10px;
  --shadow:0 1px 2px rgba(22,50,79,.04), 0 10px 24px -14px rgba(22,50,79,.18);
  --shadow-hover:0 16px 32px -16px rgba(22,50,79,.26);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);font-size:16px;line-height:1.75;color:var(--body);background:var(--bg);-webkit-font-smoothing:antialiased}
h1,h2,h3,h4,h5{margin:0;color:var(--ink);font-weight:700;line-height:1.32;letter-spacing:0}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:var(--brand);text-decoration:none;transition:color .18s ease-out,opacity .18s ease-out}
a:hover{color:var(--brand-dark)}
img{max-width:100%;display:block}
button{font-family:inherit}
:focus-visible{outline:3px solid rgba(47,107,216,.35);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:640px){.container{padding:0 24px}}
@media (min-width:1024px){.container{padding:0 32px}}

/* ---------- 通用组件 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:12px 22px;border-radius:var(--radius-sm);border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;line-height:1.2;transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .12s ease-out,box-shadow .18s ease-out}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px -12px rgba(47,107,216,.9)}
.btn-primary:hover{background:var(--brand-dark);color:#fff}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark)}
.btn-ghost:active{transform:translateY(1px)}
.btn-line{background:transparent;color:var(--brand);border-color:var(--brand)}
.btn-line:hover{background:var(--brand);color:#fff}
.btn-sm{min-height:40px;padding:9px 16px;font-size:14px}
.eyebrow{display:inline-block;margin-bottom:12px;font-size:13px;font-weight:600;color:var(--brand);background:rgba(47,107,216,.08);border-radius:999px;padding:5px 12px}
.chip{display:inline-flex;align-items:center;min-height:28px;padding:3px 12px;border-radius:999px;background:var(--tint);color:var(--brand);font-size:13px;font-weight:500}
.chip-support{background:rgba(47,169,140,.1);color:#1F7A66;box-shadow:inset 0 0 0 1px rgba(47,169,140,.35)}

/* ---------- 顶部条 / 导航 ---------- */
.topbar{background:var(--tint);border-bottom:1px solid var(--line);font-size:13px;color:var(--muted)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:36px}
.topbar-inner span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.topbar-inner a{font-size:13px;font-weight:500;color:var(--brand)}
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);backdrop-filter:saturate(140%) blur(6px);transition:box-shadow .15s ease-out}
.site-header.is-stuck{box-shadow:0 8px 20px -18px rgba(22,50,79,.5)}
.nav-wrap{display:grid;grid-template-columns:1fr auto;align-items:center;gap:16px;min-height:72px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;font-size:17px;white-space:nowrap;grid-column:1;justify-self:start}
.logo:hover{color:var(--ink)}
.logo-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand-dark));color:#fff;font-size:14px;letter-spacing:1px;flex:none}
.nav-left,.nav-right{display:none}
.nav-toggle{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:#fff;color:var(--ink);cursor:pointer;justify-self:end;grid-column:2;transition:border-color .18s,color .18s}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}
.mobile-panel{display:none;border-top:1px solid var(--line);background:#fff;max-height:calc(100vh - 72px);overflow-y:auto}
.mobile-panel.open{display:block}
.mobile-group{padding:14px 20px;border-bottom:1px solid var(--line)}
.mobile-group:last-child{border-bottom:0}
.mobile-group h4{font-size:13px;font-weight:600;color:var(--muted);margin-bottom:4px}
.mobile-group a{display:flex;align-items:center;min-height:48px;font-size:15px;font-weight:500;color:var(--ink)}
.mobile-group a:hover{color:var(--brand)}
.mobile-group .btn{margin-top:10px;width:100%}
@media (min-width:1024px){
  .nav-wrap{grid-template-columns:1fr auto 1fr;min-height:76px}
  .logo{grid-column:2;justify-self:center}
  .nav-left{display:flex;align-items:center;gap:26px;grid-column:1}
  .nav-right{display:flex;align-items:center;gap:24px;grid-column:3;justify-content:flex-end}
  .nav-toggle{display:none}
  .nav-left a,.nav-right a:not(.btn){font-size:15px;font-weight:500;color:var(--ink);padding:10px 0;position:relative}
  .nav-left a::after,.nav-right a:not(.btn)::after{content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .18s ease-out}
  .nav-left a:hover,.nav-right a:not(.btn):hover{color:var(--brand)}
  .nav-left a:hover::after,.nav-right a:not(.btn):hover::after{transform:scaleX(1)}
  .nav-right a.is-active{color:var(--brand)}
  .nav-right a.is-active::after{transform:scaleX(1)}
}

/* ---------- 页头 / 面包屑 / 文章头 ---------- */
.page-head{position:relative;background:linear-gradient(180deg,#FFFFFF 0%,var(--tint) 100%);border-bottom:1px solid var(--line);overflow:hidden}
.page-head::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(22,50,79,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(22,50,79,.045) 1px,transparent 1px);background-size:64px 64px;pointer-events:none}
.page-head-inner{position:relative;z-index:2;padding:22px 0 40px}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.crumb a{color:var(--brand);font-weight:500}
.crumb .sep{color:#B6C2D2}
.crumb-now{color:var(--ink);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-head{max-width:880px;margin-top:22px}
.article-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.article-head h1{font-size:clamp(26px,3.4vw,40px);line-height:1.24;font-weight:700;color:var(--ink)}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px 14px;margin-top:18px;font-size:14px;color:var(--muted)}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#C3CEDD}
.share{display:flex;gap:8px;margin-left:auto}
.share button{display:inline-flex;align-items:center;gap:6px;min-height:38px;padding:7px 14px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--ink);font-size:13px;font-weight:500;cursor:pointer;transition:border-color .18s,color .18s,background-color .18s}
.share button:hover{border-color:var(--brand);color:var(--brand);background:#fff}

/* ---------- 正文布局 ---------- */
.article-section{padding:48px 0 64px;background:var(--bg)}
@media (min-width:768px){.article-section{padding:56px 0 76px}}
.article-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:1024px){.article-grid{grid-template-columns:minmax(0,1fr) 300px;gap:48px;align-items:start}}
.article-main{min-width:0;max-width:780px}
.lead-card{background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:12px;padding:20px 22px;box-shadow:var(--shadow);margin-bottom:32px}
.lead-card h2{font-size:17px;margin-bottom:10px}
.lead-card ul{display:grid;gap:8px}
.lead-card li{position:relative;padding-left:18px;font-size:14.5px;line-height:1.75;color:var(--body)}
.lead-card li::before{content:"";position:absolute;left:0;top:.68em;width:7px;height:7px;border-radius:50%;background:var(--support)}
.article-body{font-size:16.5px;line-height:1.85;color:var(--body);word-break:break-word}
.article-body p{margin:1.05em 0 0}
.article-body h2{position:relative;margin:40px 0 16px;padding-left:14px;font-size:clamp(20px,2.2vw,26px);line-height:1.35;scroll-margin-top:96px}
.article-body h2::before{content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:4px;border-radius:2px;background:var(--brand)}
.article-body h3{margin:28px 0 12px;font-size:20px;line-height:1.4}
.article-body h4{margin:22px 0 10px;font-size:17px}
.article-body ul,.article-body ol{margin:16px 0}
.article-body ul li{position:relative;padding-left:18px;margin:8px 0}
.article-body ul li::before{content:"";position:absolute;left:0;top:.72em;width:7px;height:7px;border-radius:50%;background:var(--brand)}
.article-body ol{list-style:decimal;padding-left:1.4em}
.article-body ol li{margin:8px 0;padding-left:4px}
.article-body blockquote{margin:24px 0;padding:16px 20px;background:var(--tint);border-left:3px solid var(--accent);border-radius:0 12px 12px 0;color:var(--ink);font-size:15.5px}
.article-body blockquote p{margin:0}
.article-body img{width:auto;max-width:100%;height:auto;border-radius:12px;margin:24px auto;border:1px solid var(--line)}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:8px}
.article-body a{color:var(--brand);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.article-body a:hover{color:var(--brand-dark)}
.article-body strong{color:var(--ink)}
.article-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:14.5px;display:block;overflow-x:auto}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.article-body th{background:var(--tint);color:var(--ink);font-weight:600}
.article-body tbody tr:nth-child(even){background:#FAFCFE}
.article-body pre{overflow-x:auto;background:#0F2033;color:#E7EEF9;padding:16px;border-radius:12px;font-size:13.5px;line-height:1.7}
.empty-state{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:48px 24px;text-align:center;min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px}
.empty-state .empty-icon{width:52px;height:52px;border-radius:16px;background:var(--tint);color:var(--brand);display:grid;place-items:center;font-size:22px}
.empty-state h2{font-size:19px}
.empty-state p{font-size:14.5px;color:var(--muted);max-width:380px}

/* ---------- 侧栏 ---------- */
.article-side{min-width:0}
.side-sticky{display:grid;gap:20px}
@media (min-width:1024px){.side-sticky{position:sticky;top:96px}}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.side-card h2,.side-card h3{font-size:16px;margin-bottom:12px;color:var(--ink)}
.side-text{font-size:14px;line-height:1.75;color:var(--muted);margin-bottom:14px}
.toc-list{display:grid;gap:4px}
.toc-list a{display:block;font-size:14px;line-height:1.6;color:var(--body);padding:7px 0 7px 12px;border-left:2px solid var(--line);transition:color .18s,border-color .18s}
.toc-list a:hover{color:var(--brand);border-left-color:var(--brand)}
.toc-list a.is-current{color:var(--brand);border-left-color:var(--brand);font-weight:600}
.side-dl{display:grid;gap:10px}
.side-dl .btn{width:100%}
.side-note{font-size:12.5px;color:var(--muted);margin-top:12px;line-height:1.7}

/* ---------- 主题索引 ---------- */
.topic-section{padding:56px 0;background:var(--surface);border-top:1px solid var(--line)}
@media (min-width:768px){.topic-section{padding:72px 0}}
.section-head{max-width:720px;margin-bottom:28px}
.section-head h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:10px}
.section-head p{font-size:15px;color:var(--body);line-height:1.8}
.topic-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:640px){.topic-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.topic-grid{grid-template-columns:repeat(4,1fr)}}
.topic-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:10px;transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out}
.topic-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#CFDDEF}
.topic-card h3{font-size:17px;line-height:1.45}
.topic-card p{font-size:14px;line-height:1.75;color:var(--body)}
.topic-card .topic-link{margin-top:auto;font-size:14px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px}
.topic-card:hover .topic-link{gap:10px}
.topic-link{transition:gap .18s ease-out,color .18s ease-out}

/* ---------- 参与须知 ---------- */
.notice-section{padding:56px 0;background:var(--tint);border-top:1px solid var(--line)}
@media (min-width:768px){.notice-section{padding:72px 0}}
.notice-grid{display:grid;grid-template-columns:1fr;gap:24px}
@media (min-width:768px){.notice-grid{grid-template-columns:repeat(2,1fr);gap:28px}}
.notice-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.notice-card h3{display:flex;align-items:center;gap:10px;font-size:17px;margin-bottom:14px}
.notice-card h3 .badge{display:inline-grid;place-items:center;min-width:30px;height:30px;border-radius:10px;background:rgba(47,107,216,.1);color:var(--brand);font-size:13px;font-weight:700}
.notice-card.is-after h3 .badge{background:rgba(47,169,140,.12);color:#1F7A66}
.notice-list{display:grid;gap:10px;counter-reset:notice}
.notice-list li{position:relative;padding-left:28px;font-size:14.5px;line-height:1.75;color:var(--body);counter-increment:notice}
.notice-list li::before{content:counter(notice,decimal-leading-zero);position:absolute;left:0;top:2px;font-size:12px;font-weight:700;color:var(--brand);background:rgba(47,107,216,.08);border-radius:6px;padding:1px 5px}

/* ---------- FAQ ---------- */
.faq-section{padding:56px 0;background:var(--surface);border-top:1px solid var(--line)}
@media (min-width:768px){.faq-section{padding:72px 0}}
.faq-list{display:grid;gap:12px;max-width:860px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:2px 20px;box-shadow:var(--shadow);transition:border-color .18s ease-out,box-shadow .18s ease-out}
.faq-item:hover{border-color:#CFDDEF}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:58px;padding:12px 0;font-size:16px;font-weight:600;color:var(--ink);cursor:pointer;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";flex:none;font-size:20px;line-height:1;color:var(--brand);transition:transform .18s ease-out}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item .faq-answer{padding:0 0 18px;font-size:15px;line-height:1.8;color:var(--body)}

/* ---------- 转化条 ---------- */
.cta-section{padding:56px 0 72px;background:var(--bg)}
.cta-band{display:grid;gap:20px;background:linear-gradient(120deg,var(--tint) 0%,#FFFFFF 100%);border:1px solid var(--line);border-radius:22px;padding:28px;box-shadow:var(--shadow)}
@media (min-width:900px){.cta-band{grid-template-columns:1fr auto;align-items:center;padding:36px 40px;gap:32px}}
.cta-band h2{font-size:clamp(20px,2.3vw,26px);margin-bottom:8px}
.cta-band p{font-size:14.5px;color:var(--body);line-height:1.75;max-width:520px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- 返回入口 ---------- */
.back-row{display:flex;flex-wrap:wrap;gap:10px 24px;padding:20px 0 0;border-top:1px solid var(--line);margin-top:36px;font-size:14px;font-weight:600}
.back-row a{display:inline-flex;align-items:center;gap:6px;color:var(--brand)}
.back-row a:hover{color:var(--brand-dark)}

/* ---------- 页脚 ---------- */
.footer{background:#fff;border-top:1px solid var(--line);padding:56px 0 24px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:16px;color:var(--ink);margin-bottom:14px}
.footer-brand:hover{color:var(--ink)}
.footer h4{font-size:15px;color:var(--ink);margin-bottom:14px}
.footer ul{display:grid;gap:10px}
.footer ul a{font-size:14px;color:var(--body)}
.footer ul a:hover{color:var(--brand)}
.footer p{font-size:14px;line-height:1.8;color:var(--muted);max-width:330px}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;margin-top:36px;padding-top:18px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
@media (max-width:520px){
  .article-meta{font-size:13px}
  .share{margin-left:0;width:100%}
  .cta-band{padding:22px}
  .btn{padding:11px 18px;font-size:14px}
}

/* roulang page: category1 */
:root{
  --brand:#2F6BD8; --brand-dark:#1B4AA8; --ink:#16324F; --body:#475467; --muted:#7A8798;
  --accent:#F2884B; --support:#2FA98C; --bg:#F7F9FC; --surface:#FFFFFF; --tint:#EFF4FB; --line:#DFE7F1;
  --radius:16px; --radius-sm:10px;
  --shadow:0 1px 2px rgba(22,50,79,.04), 0 10px 24px -14px rgba(22,50,79,.18);
  --shadow-hover:0 16px 32px -16px rgba(22,50,79,.26);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);font-size:16px;line-height:1.75;color:var(--body);background:var(--bg);-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none;transition:color .18s ease-out}
a:hover{color:var(--brand-dark)}
img{max-width:100%;display:block}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0}
summary{list-style:none}
summary::-webkit-details-marker{display:none}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(47,107,216,.28);border-radius:8px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:640px){.container{padding:0 24px}}
@media(min-width:1024px){.container{padding:0 32px}}

/* 顶栏 */
.topbar{background:var(--tint);border-bottom:1px solid var(--line);font-size:13px;color:var(--muted)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:36px}
.topbar-inner span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.topbar-inner a{font-size:13px;color:var(--brand);font-weight:500;white-space:nowrap}

/* 导航 */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);backdrop-filter:saturate(140%) blur(6px)}
.nav-wrap{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:20px;min-height:74px}
.nav-left,.nav-right{display:flex;align-items:center;gap:26px}
.nav-right{justify-content:flex-end}
.nav-left a,.nav-right a{font-size:15px;font-weight:500;color:var(--ink);padding:10px 0;position:relative}
.nav-left a::after,.nav-right a:not(.btn)::after{content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .18s ease-out}
.nav-left a:hover,.nav-right a:not(.btn):hover{color:var(--brand)}
.nav-left a:hover::after,.nav-right a:not(.btn):hover::after{transform:scaleX(1)}
.nav-right a.is-active{color:var(--brand)}
.nav-right a.is-active::after{transform:scaleX(1)}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;font-size:17px;white-space:nowrap}
.logo:hover{color:var(--ink)}
.logo-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand-dark));color:#fff;font-size:14px;letter-spacing:1px}
.nav-toggle{display:none;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:#fff;color:var(--ink);cursor:pointer;transition:border-color .18s ease-out,color .18s ease-out}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}
.mobile-panel{display:none;border-top:1px solid var(--line);background:#fff}
.mobile-panel.open{display:block}
.mobile-group{padding:14px 20px;border-bottom:1px solid var(--line)}
.mobile-group:last-child{border-bottom:0}
.mobile-group h4{font-size:13px;font-weight:600;color:var(--muted);margin:0 0 6px}
.mobile-group a{display:flex;align-items:center;min-height:48px;font-size:15px;font-weight:500;color:var(--ink)}
.mobile-group a:hover{color:var(--brand)}
.mobile-cta{width:100%;margin:6px 0}
@media(max-width:1023px){
  .nav-left,.nav-right{display:none}
  .nav-wrap{grid-template-columns:1fr auto;justify-items:start}
  .logo{grid-column:1}
  .nav-toggle{display:inline-flex;justify-self:end}
}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:12px 22px;border-radius:var(--radius-sm);border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .12s ease-out,box-shadow .18s ease-out}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px -12px rgba(47,107,216,.9)}
.btn-primary:hover{background:var(--brand-dark);color:#fff}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{min-height:40px;padding:9px 16px;font-size:14px}

/* 页头 */
.page-hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#FFFFFF 0%,var(--tint) 100%);border-bottom:1px solid var(--line);padding:28px 0 44px}
.page-hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(22,50,79,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(22,50,79,.05) 1px,transparent 1px);background-size:56px 56px;pointer-events:none}
.page-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#B9C4D3}
.breadcrumb [aria-current]{color:var(--ink);font-weight:500}
.page-title{margin:16px 0 0;font-size:clamp(26px,3.4vw,40px);line-height:1.24;font-weight:700;color:var(--ink);letter-spacing:0;max-width:860px}
.page-hero-sub{margin-top:12px;font-size:16px;font-weight:600;color:var(--ink);line-height:1.6;max-width:820px}
.page-hero-desc{margin-top:14px;max-width:820px;font-size:15px;line-height:1.85;color:var(--body)}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.tag{display:inline-flex;align-items:center;padding:5px 12px;border-radius:999px;font-size:13px;font-weight:500;background:rgba(47,107,216,.08);color:var(--brand);border:1px solid rgba(47,107,216,.18)}

/* 通用小节 */
.section{padding:56px 0}
@media(min-width:1024px){.section{padding:80px 0}}
.section-bg{background:var(--bg)}
.section-surface{background:var(--surface)}
.section-tint{background:var(--tint);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:820px;margin-bottom:32px}
.eyebrow{display:inline-block;margin-bottom:12px;font-size:13px;font-weight:600;letter-spacing:.02em;color:var(--brand);background:rgba(47,107,216,.08);border-radius:999px;padding:5px 12px}
.section-title{font-size:clamp(22px,2.4vw,30px);line-height:1.32;font-weight:700;color:var(--ink)}
.section-sub{margin-top:12px;font-size:15px;line-height:1.85;color:var(--body)}

/* 筛选条 */
.filter-bar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px 20px}
.filter-pills{display:flex;flex-wrap:wrap;gap:10px}
.filter-pill{display:inline-flex;align-items:center;gap:8px;min-height:40px;padding:8px 14px;border:1px solid var(--line);border-radius:999px;background:var(--bg);font-size:14px;font-weight:500;color:var(--ink)}
.filter-pill .caret{width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid var(--muted)}
.filter-count{font-size:13px;color:var(--muted)}

/* 活动卡片 */
.activity-grid{display:grid;grid-template-columns:1fr;gap:24px}
@media(min-width:640px){.activity-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
.activity-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .18s ease-out,box-shadow .18s ease-out}
.activity-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.activity-media{aspect-ratio:16/9;overflow:hidden;background:var(--tint)}
.activity-media img{width:100%;height:100%;object-fit:cover;transition:transform .18s ease-out}
.activity-card:hover .activity-media img{transform:scale(1.02)}
.activity-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px}
.activity-tags{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-flex;align-items:center;padding:4px 11px;border-radius:999px;font-size:13px;font-weight:500;background:var(--tint);color:var(--brand);border:1px solid rgba(47,107,216,.18)}
.chip-support{background:rgba(47,169,140,.1);color:#1F7F69;border-color:rgba(47,169,140,.35)}
.activity-card h3{margin:0;font-size:19px;line-height:1.4;font-weight:600;color:var(--ink)}
.activity-meta{font-size:13px;color:var(--muted)}
.activity-desc{font-size:14px;line-height:1.8;color:var(--body)}

/* 步骤 */
.steps{display:grid;grid-template-columns:1fr;gap:18px;margin-top:4px}
@media(min-width:560px){.steps{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.steps{grid-template-columns:repeat(4,minmax(0,1fr))}}
.step{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:transform .18s ease-out,box-shadow .18s ease-out}
.step:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.step-num{display:grid;place-items:center;width:36px;height:36px;border-radius:12px;background:rgba(47,107,216,.1);color:var(--brand);font-weight:700;font-size:15px;margin-bottom:14px}
.step h3{margin:0 0 8px;font-size:17px;font-weight:600;color:var(--ink);line-height:1.4}
.step p{font-size:14px;line-height:1.8;color:var(--body)}

/* 兴趣细分 */
.interest-grid{display:grid;grid-template-columns:1fr;gap:18px}
@media(min-width:640px){.interest-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.interest-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.interest-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.interest-card h3{margin:0 0 8px;font-size:17px;font-weight:600;color:var(--ink)}
.interest-card p{font-size:14px;line-height:1.8;color:var(--body)}
.interest-card .chip{margin-top:12px}

/* 注意事项 */
.note-grid{display:grid;grid-template-columns:1fr;gap:18px}
@media(min-width:640px){.note-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
.note-card{background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--support);border-radius:14px;padding:20px 22px;box-shadow:var(--shadow)}
.note-card h3{margin:0 0 8px;font-size:16px;font-weight:600;color:var(--ink)}
.note-card p{font-size:14px;line-height:1.8;color:var(--body)}

/* 时段安排 */
.slot-grid{display:grid;grid-template-columns:1fr;gap:18px}
@media(min-width:768px){.slot-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.slot-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.slot-time{display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;font-size:13px;font-weight:600;color:#B85F26;background:rgba(242,136,75,.12);border:1px solid rgba(242,136,75,.32)}
.slot-card h3{margin:14px 0 10px;font-size:17px;font-weight:600;color:var(--ink)}
.slot-card p{font-size:14px;line-height:1.8;color:var(--body)}

/* FAQ */
.faq-list{display:grid;gap:12px;max-width:900px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:0 20px;transition:border-color .18s ease-out}
.faq-item:hover{border-color:#C9D8EC}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:62px;cursor:pointer;font-size:16px;font-weight:600;color:var(--ink)}
.faq-icon{flex:none;display:grid;place-items:center;width:26px;height:26px;border-radius:50%;background:var(--tint);color:var(--brand);font-size:16px;line-height:1;transition:transform .18s ease-out,background-color .18s ease-out}
.faq-item[open] .faq-icon{transform:rotate(45deg);background:rgba(47,107,216,.14)}
.faq-body{padding:0 0 18px;font-size:15px;line-height:1.85;color:var(--body);max-width:760px}

/* 表单 */
.join-panel{display:grid;grid-template-columns:1fr;gap:32px;background:var(--surface);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:28px}
@media(min-width:1024px){.join-panel{grid-template-columns:.85fr 1.15fr;padding:40px;gap:48px}}
.join-intro h2{font-size:clamp(21px,2.2vw,26px);line-height:1.35;font-weight:700;color:var(--ink)}
.join-intro p{margin-top:14px;font-size:15px;line-height:1.85;color:var(--body)}
.join-points{margin-top:20px;display:grid;gap:10px}
.join-points li{position:relative;padding-left:22px;font-size:14px;line-height:1.75;color:var(--body)}
.join-points li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;background:var(--support)}
.join-form{display:grid;gap:16px}
.field{display:grid;gap:6px}
.field label{font-size:14px;font-weight:600;color:var(--ink)}
.field input,.field select{width:100%;min-height:44px;padding:10px 14px;border:1px solid var(--line);border-radius:var(--radius-sm);background:#fff;font-family:inherit;font-size:15px;color:var(--ink);transition:border-color .18s ease-out,box-shadow .18s ease-out}
.field input:focus,.field select:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(47,107,216,.18);outline:none}
.field input.is-invalid,.field select.is-invalid{border-color:#D64545;box-shadow:0 0 0 3px rgba(214,69,69,.14)}
.field-error{font-size:13px;color:#D64545;min-height:18px}
.choice-row{display:flex;flex-wrap:wrap;gap:8px}
.choice{position:relative;display:inline-flex;align-items:center}
.choice input{position:absolute;opacity:0;width:1px;height:1px}
.choice span{display:inline-flex;align-items:center;min-height:38px;padding:7px 14px;border-radius:999px;border:1px solid var(--line);background:var(--bg);font-size:14px;color:var(--body);cursor:pointer;transition:border-color .18s ease-out,color .18s ease-out,background-color .18s ease-out}
.choice input:checked + span{border-color:var(--brand);color:var(--brand);background:rgba(47,107,216,.09);font-weight:600}
.choice input:focus-visible + span{box-shadow:0 0 0 3px rgba(47,107,216,.24)}
.form-note{font-size:14px;font-weight:600;color:#1F7F69;background:rgba(47,169,140,.1);border:1px solid rgba(47,169,140,.32);border-radius:10px;padding:10px 14px;display:none}
.form-note.show{display:block}
.form-tip{font-size:13px;color:var(--muted)}

/* 底部转化条 */
.cta-band{background:linear-gradient(135deg,var(--tint),#FFFFFF);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:28px;display:grid;gap:18px}
@media(min-width:768px){.cta-band{grid-template-columns:1fr auto;align-items:center;padding:36px 40px;gap:32px}}
.cta-band h2{font-size:clamp(20px,2.2vw,26px);line-height:1.36;font-weight:700;color:var(--ink)}
.cta-band p{margin-top:10px;font-size:15px;line-height:1.8;color:var(--body);max-width:640px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media(max-width:767px){.cta-actions .btn{width:100%}}

/* 页脚 */
.footer{background:#FFFFFF;border-top:1px solid var(--line);padding:56px 0 28px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media(min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:16px;color:var(--ink)}
.footer-brand:hover{color:var(--ink)}
.footer-grid p{margin-top:12px;font-size:14px;line-height:1.85;color:var(--body);max-width:300px}
.footer-grid h4{margin:0 0 12px;font-size:14px;font-weight:600;color:var(--ink)}
.footer-grid li{margin-bottom:4px}
.footer-grid li a{display:inline-flex;align-items:center;min-height:34px;font-size:14px;color:var(--body)}
.footer-grid li a:hover{color:var(--brand)}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;margin-top:34px;padding-top:20px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}