/* roulang page: index */
:root{
  --brand-700:#245A93;--brand-600:#2F6FB2;--brand-500:#4A87C6;--brand-50:#EEF5FC;
  --accent-600:#D9633C;--accent-50:#FDF0E9;
  --ink:#172533;--muted:#5B6B7C;--line:#DDE6F0;--bg:#F5F8FC;--surface:#FFFFFF;
  --success:#2E8B6E;--radius-sm:10px;--radius:16px;--radius-lg:20px;
  --shadow:0 8px 24px rgba(23,37,51,.06);--shadow-hover:0 14px 36px rgba(23,37,51,.10);
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--sans);font-size:16px;line-height:1.75;color:var(--ink);background:var(--bg)}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand-700)}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid rgba(47,111,178,.35);outline-offset:2px;border-radius:6px}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1400px){.wrap{max-width:1240px}}

/* ============ header ============ */
.site-header{position:sticky;top:0;z-index:1030;background:rgba(255,255,255,.96);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid transparent;transition:box-shadow .25s ease,border-color .25s ease}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:0 6px 18px rgba(23,37,51,.06)}
.nav-inner{display:flex;align-items:center;gap:18px;min-height:74px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{width:42px;height:42px;border-radius:13px;background:linear-gradient(150deg,var(--brand-600),var(--brand-500));display:grid;place-items:center;color:#fff;font-size:18px;box-shadow:0 6px 16px rgba(47,111,178,.28)}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:17px;font-weight:700;color:var(--ink);letter-spacing:0}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted)}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:14px}
.nav-links>li{position:relative}
.nav-links>li>a{display:inline-flex;align-items:center;gap:6px;padding:9px 14px;border-radius:10px;font-size:15px;font-weight:500;color:#2b3b4b}
.nav-links>li>a:hover,.nav-links>li>a:focus{background:var(--brand-50);color:var(--brand-700)}
.nav-links>li>a.active{color:var(--brand-700);background:var(--brand-50);font-weight:600}
.nav-tools{margin-left:auto;display:flex;align-items:center;gap:10px}
.icon-btn{width:40px;height:40px;border-radius:11px;border:1px solid var(--line);background:#fff;display:grid;place-items:center;color:var(--muted)}
.icon-btn:hover{border-color:var(--brand-500);color:var(--brand-700);background:var(--brand-50)}
.link-quiet{font-size:15px;color:var(--muted);padding:8px 6px}
.link-quiet:hover{color:var(--brand-700)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:11px 22px;border-radius:var(--radius-sm);font-size:15px;font-weight:600;border:1px solid transparent;transition:transform .18s ease,background .18s ease,box-shadow .18s ease,color .18s ease,border-color .18s ease}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 6px 16px rgba(47,111,178,.22)}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(47,111,178,.28)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--brand-700);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand-500);background:var(--brand-50);color:var(--brand-700)}
.btn-accent{background:var(--accent-600);color:#fff}
.btn-accent:hover{background:#c2542f;color:#fff;transform:translateY(-1px)}
.btn-block{width:100%}
.btn-sm{min-height:38px;padding:8px 16px;font-size:14px}
.text-link{color:var(--brand-700);font-weight:600;font-size:15px;border-bottom:1px solid transparent}
.text-link:hover{color:var(--brand-700);border-bottom-color:var(--brand-500)}
.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:#fff;color:var(--ink);align-items:center;justify-content:center;font-size:18px}

/* mega menu */
.mega-menu{position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%);width:840px;max-width:calc(100vw - 40px);background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-hover);padding:24px;display:none;z-index:1050}
.mega-parent:hover>.mega-menu{display:block}
.mega-grid{display:grid;grid-template-columns:1.1fr 1.1fr .9fr;gap:24px}
.mega-col h4{font-size:13px;font-weight:600;color:var(--muted);margin-bottom:10px;text-transform:none}
.mega-col a.mega-link{display:block;padding:9px 12px;border-radius:10px;font-size:15px;color:#2b3b4b}
.mega-col a.mega-link:hover{background:var(--brand-50);color:var(--brand-700)}
.mega-promo{background:var(--brand-50);border-radius:var(--radius);padding:18px}
.mega-promo h5{font-size:16px;font-weight:700;margin-bottom:8px}
.mega-promo p{font-size:13.5px;color:var(--muted);line-height:1.7;margin-bottom:12px}

/* mobile nav */
.mobile-panel{display:none;border-top:1px solid var(--line);background:#fff}
.mobile-panel.open{display:block}
.mobile-panel ul{padding:10px 0}
.mobile-panel li a{display:block;padding:12px 20px;font-size:15.5px;color:#2b3b4b;border-radius:0}
.mobile-panel li a:hover{background:var(--brand-50);color:var(--brand-700)}
.mobile-panel .m-sub{padding-left:32px;font-size:14.5px;color:var(--muted)}
.mobile-cta{padding:14px 20px 20px;border-top:1px dashed var(--line)}

/* ============ section base ============ */
.section{padding:72px 0}
.section-alt{background:var(--surface)}
.section-line{border-top:1px solid var(--line)}
.sec-head{max-width:760px;margin-bottom:34px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-tag{display:inline-flex;align-items:center;gap:7px;padding:5px 13px;border-radius:999px;background:var(--brand-50);color:var(--brand-700);font-size:13px;font-weight:600;margin-bottom:14px}
.sec-head h2{font-size:clamp(24px,2.6vw,33px);line-height:1.35;font-weight:700;color:var(--ink)}
.sec-head p{margin-top:12px;color:var(--muted);font-size:15.5px;line-height:1.8}
.badge-soft{display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:999px;background:var(--brand-50);color:var(--brand-700);font-size:12.5px;font-weight:600;white-space:nowrap}
.badge-accent{background:var(--accent-50);color:var(--accent-600)}
.badge-success{background:rgba(46,139,110,.12);color:var(--success)}
.badge-grey{background:#EEF1F5;color:var(--muted)}

/* ============ hero ============ */
.hero{position:relative;padding:64px 0 72px;background:linear-gradient(180deg,var(--brand-50) 0%,#F7FAFE 62%,var(--bg) 100%);overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(47,111,178,.14) 1px,transparent 1px);background-size:22px 22px;opacity:.55;pointer-events:none}
.hero .wrap{position:relative;z-index:1}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:start}
.hero h1{font-size:clamp(28px,3.6vw,44px);line-height:1.28;font-weight:700;letter-spacing:0}
.hero h1 span{color:var(--brand-700)}
.hero-lead{margin-top:18px;font-size:16px;line-height:1.85;color:#3d4d5d;max-width:620px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.hero-points span{display:inline-flex;align-items:center;gap:7px;padding:7px 13px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13.5px;color:#33475a;box-shadow:0 2px 6px rgba(23,37,51,.04)}
.hero-points i{color:var(--brand-600);font-size:12px}
.lead-card{margin-top:26px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:22px}
.lead-card h3{font-size:17px;font-weight:700;margin-bottom:4px}
.lead-card .lead-note{font-size:13.5px;color:var(--muted);margin-bottom:16px}
.lead-form{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1 / -1}
.field label{font-size:13px;font-weight:600;color:#40536a}
.field input,.field select,.field textarea{width:100%;min-height:44px;padding:10px 13px;border:1px solid var(--line);border-radius:var(--radius-sm);background:#FBFDFF;color:var(--ink);font-size:14.5px;transition:border-color .18s ease,background .18s ease,box-shadow .18s ease}
.field textarea{min-height:96px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand-500);background:#fff;box-shadow:0 0 0 3px rgba(47,111,178,.14)}
.lead-form .btn{grid-column:1 / -1}
.form-hint{font-size:12.5px;color:var(--muted);line-height:1.6}
.hero-side{display:flex;flex-direction:column;gap:18px}
.doc-cover{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-hover);border:1px solid rgba(255,255,255,.6);aspect-ratio:4/3;background:#dfe9f5}
.doc-cover img{width:100%;height:100%;object-fit:cover}
.doc-cover .cover-tag{position:absolute;left:16px;top:16px;background:rgba(255,255,255,.94);color:var(--brand-700);font-size:12.5px;font-weight:600;padding:6px 13px;border-radius:999px}
.doc-cover .cover-title{position:absolute;left:16px;right:16px;bottom:16px;background:rgba(23,37,51,.82);color:#fff;border-radius:14px;padding:14px 16px}
.doc-cover .cover-title strong{display:block;font-size:16px;font-weight:700}
.doc-cover .cover-title span{display:block;font-size:12.5px;color:#d5e3f2;margin-top:3px}
.toc-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px 20px}
.toc-card h4{font-size:14px;font-weight:700;color:#33475a;margin-bottom:10px}
.toc-card ol{counter-reset:toc;display:grid;gap:2px}
.toc-card li{counter-increment:toc}
.toc-card li a{display:flex;align-items:center;gap:10px;padding:7px 8px;border-radius:8px;font-size:14.5px;color:#3d4d5d}
.toc-card li a::before{content:counter(toc,decimal-leading-zero);font-size:12px;color:var(--brand-500);font-variant-numeric:tabular-nums;font-weight:600}
.toc-card li a:hover{background:var(--brand-50);color:var(--brand-700)}

/* ============ KPI ============ */
.kpi-band{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.kpi-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.kpi-item{padding:34px 22px;text-align:center;border-right:1px solid var(--line)}
.kpi-item:last-child{border-right:0}
.kpi-num{font-size:clamp(26px,3vw,36px);font-weight:700;color:var(--brand-700);font-variant-numeric:tabular-nums;line-height:1.2}
.kpi-label{font-size:14px;color:var(--muted);margin-top:6px}

/* ============ scene cards ============ */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.scene-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;display:flex;flex-direction:column}
.scene-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#c9dbec}
.scene-card:active{transform:translateY(0)}
.scene-icon{width:44px;height:44px;border-radius:12px;background:var(--brand-50);color:var(--brand-700);display:grid;place-items:center;font-size:18px;margin-bottom:14px}
.scene-card h3{font-size:18.5px;font-weight:700;margin-bottom:8px}
.scene-card p{font-size:14.5px;color:var(--muted);line-height:1.75;min-height:50px}
.scene-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.chip{display:inline-flex;align-items:center;padding:4px 10px;border-radius:999px;background:#F1F5FA;color:#4a5d72;font-size:12.5px}
.chip:hover{background:var(--brand-50);color:var(--brand-700)}

/* ============ topics ============ */
.topic-layout{display:grid;grid-template-columns:1.6fr .9fr;gap:28px;align-items:start}
.topic-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);overflow:hidden}
.topic-row{display:grid;grid-template-columns:44px 1fr auto;gap:14px;align-items:center;padding:16px 20px;border-bottom:1px solid var(--line);transition:background .18s ease}
.topic-row:last-child{border-bottom:0}
.topic-row:hover{background:#F8FBFE}
.rank{width:32px;height:32px;border-radius:9px;display:grid;place-items:center;font-weight:700;font-size:14px;background:#EEF1F5;color:var(--muted);font-variant-numeric:tabular-nums}
.rank.top{background:var(--accent-50);color:var(--accent-600)}
.topic-row h3{font-size:16px;font-weight:600;line-height:1.5}
.topic-row .t-meta{display:flex;align-items:center;gap:10px;margin-top:5px;font-size:12.5px;color:var(--muted)}
.topic-count{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap}
.side-stack{display:flex;flex-direction:column;gap:18px}
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}
.side-card h4{font-size:15.5px;font-weight:700;margin-bottom:12px}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
.tag-cloud span{padding:5px 11px;border-radius:999px;background:#F1F5FA;font-size:13px;color:#4a5d72}
.tag-cloud span:hover{background:var(--brand-50);color:var(--brand-700)}
.editor-note{background:var(--accent-50);border:1px solid #F5D9CC;border-radius:var(--radius);padding:18px}
.editor-note h4{font-size:15px;font-weight:700;color:#8d3f22;margin-bottom:8px}
.editor-note p{font-size:13.8px;color:#94553c;line-height:1.75}

/* ============ compare ============ */
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.compare-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:26px}
.compare-card.good{border-color:#BFD9F1;box-shadow:0 10px 28px rgba(47,111,178,.10)}
.compare-card h3{font-size:19px;font-weight:700;margin-bottom:6px}
.compare-card .c-sub{font-size:13.5px;color:var(--muted);margin-bottom:16px}
.compare-list{display:grid;gap:12px}
.compare-list li{display:flex;gap:10px;font-size:14.6px;color:#3d4d5d;line-height:1.7}
.compare-list i{flex-shrink:0;margin-top:5px;font-size:13px}
.compare-card.good .compare-list i{color:var(--success)}
.compare-card.plain .compare-list i{color:#A9B6C4}

/* ============ timeline ============ */
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative}
.timeline::before{content:"";position:absolute;left:8%;right:8%;top:19px;height:2px;background:linear-gradient(90deg,var(--brand-50),var(--brand-500),var(--brand-50))}
.tl-item{position:relative;padding-top:0;text-align:left}
.tl-dot{width:38px;height:38px;border-radius:50%;background:#fff;border:2px solid var(--brand-500);color:var(--brand-700);display:grid;place-items:center;font-size:13px;font-weight:700;position:relative;z-index:1;margin-bottom:14px}
.tl-item h3{font-size:16.5px;font-weight:700;margin-bottom:6px}
.tl-item p{font-size:14px;color:var(--muted);line-height:1.75}
.tl-year{font-size:12.5px;color:var(--brand-600);font-weight:600;margin-bottom:4px;font-variant-numeric:tabular-nums}

/* ============ steps ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.step-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);position:relative;transition:transform .2s ease,box-shadow .2s ease}
.step-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.step-num{width:34px;height:34px;border-radius:11px;background:var(--brand-600);color:#fff;display:grid;place-items:center;font-weight:700;font-size:14px;margin-bottom:14px}
.step-card h3{font-size:16.5px;font-weight:700;margin-bottom:6px}
.step-card p{font-size:14px;color:var(--muted);line-height:1.72}
.steps-foot{margin-top:24px}

/* ============ wiki ============ */
.wiki-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.wiki-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;transition:transform .2s ease,box-shadow .2s ease}
.wiki-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.wiki-card .w-kicker{font-size:12.5px;color:var(--brand-600);font-weight:600;margin-bottom:8px}
.wiki-card h3{font-size:18px;font-weight:700;margin-bottom:10px}
.wiki-card p{font-size:14.5px;color:var(--muted);line-height:1.78;min-height:78px}
.wiki-foot{display:flex;align-items:center;justify-content:space-between;margin-top:16px;padding-top:14px;border-top:1px dashed var(--line);font-size:12.5px;color:var(--muted)}

/* ============ stories ============ */
.stories{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.story-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:transform .2s ease,box-shadow .2s ease;display:flex;flex-direction:column}
.story-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.story-media{aspect-ratio:16/10;overflow:hidden;background:#e6eef7}
.story-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.story-card:hover .story-media img{transform:scale(1.04)}
.story-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.story-body blockquote{margin:0;font-size:14.8px;line-height:1.78;color:#33475a}
.story-meta{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--muted);margin-top:auto}

/* ============ calendar ============ */
.calendar{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);overflow:hidden}
.cal-head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 24px;border-bottom:1px solid var(--line);background:#FBFDFF}
.cal-head h3{font-size:17px;font-weight:700}
.cal-row{display:grid;grid-template-columns:74px 1fr auto;gap:18px;align-items:center;padding:18px 24px;border-bottom:1px solid var(--line);transition:background .18s ease}
.cal-row:last-child{border-bottom:0}
.cal-row:hover{background:#F8FBFE}
.date-block{background:var(--brand-50);border-radius:12px;text-align:center;padding:8px 4px;color:var(--brand-700)}
.date-block .d-day{font-size:20px;font-weight:700;line-height:1.1;font-variant-numeric:tabular-nums}
.date-block .d-mon{font-size:12px;color:var(--brand-600)}
.cal-row h4{font-size:16px;font-weight:600;margin-bottom:5px}
.cal-meta{display:flex;flex-wrap:wrap;gap:8px;font-size:12.5px;color:var(--muted);align-items:center}

/* ============ category entry ============ */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cat-card{display:flex;flex-direction:column;gap:12px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px;box-shadow:var(--shadow);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.cat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#BFD9F1}
.cat-card .cat-top{display:flex;align-items:center;justify-content:space-between}
.cat-card h3{font-size:19px;font-weight:700}
.cat-card .cat-arrow{width:34px;height:34px;border-radius:50%;background:var(--brand-50);color:var(--brand-700);display:grid;place-items:center;font-size:13px}
.cat-card p{font-size:14.5px;color:var(--muted);line-height:1.75}
.cat-count{font-size:13px;color:var(--brand-700);font-weight:600}

/* ============ feed ============ */
.feed-layout{display:grid;grid-template-columns:1.7fr .9fr;gap:28px;align-items:start}
.feed-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.feed-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.feed-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#c9dbec}
.feed-card a{display:block}
.feed-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
.feed-time{font-size:12.5px;color:var(--muted);font-variant-numeric:tabular-nums}
.feed-card h3{font-size:17px;font-weight:700;line-height:1.55;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.feed-card p{font-size:14.2px;color:var(--muted);line-height:1.75;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.empty-state{background:#fff;border:1px dashed var(--line);border-radius:var(--radius);padding:44px 24px;text-align:center;color:var(--muted);font-size:15px}
.side-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}
.side-list h4{font-size:15.5px;font-weight:700;margin-bottom:12px}
.side-list li a{display:flex;gap:10px;padding:9px 0;font-size:14.2px;color:#3d4d5d;border-bottom:1px dashed var(--line);line-height:1.6}
.side-list li:last-child a{border-bottom:0}
.side-list li a:hover{color:var(--brand-700)}
.side-list li a i{color:var(--brand-500);font-size:11px;margin-top:7px}

/* ============ partners ============ */
.partner-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.partner{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;display:flex;align-items:center;gap:14px;filter:grayscale(1);opacity:.82;transition:filter .25s ease,opacity .25s ease,transform .2s ease,box-shadow .2s ease}
.partner:hover{filter:grayscale(0);opacity:1;transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.partner i{font-size:20px;color:var(--brand-600)}
.partner strong{display:block;font-size:15px;font-weight:600}
.partner span{font-size:12.8px;color:var(--muted)}

/* ============ faq ============ */
.faq-layout{display:grid;grid-template-columns:.85fr 1.15fr;gap:36px;align-items:start}
.faq-side{background:var(--brand-50);border-radius:var(--radius-lg);padding:28px}
.faq-side h2{font-size:clamp(22px,2.4vw,30px);line-height:1.4;font-weight:700}
.faq-side p{margin-top:12px;font-size:14.6px;color:#3d4d5d;line-height:1.8}
.faq-side .faq-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.faq-side .faq-links span{padding:6px 12px;border-radius:999px;background:#fff;font-size:13px;color:var(--brand-700)}
.accordion-item{border:1px solid var(--line);border-radius:var(--radius)!important;margin-bottom:12px;overflow:hidden;background:#fff;box-shadow:var(--shadow)}
.accordion-button{font-size:16px;font-weight:600;color:var(--ink);padding:18px 22px;background:#fff;box-shadow:none!important}
.accordion-button:not(.collapsed){color:var(--brand-700);background:var(--brand-50)}
.accordion-button::after{background-size:14px;width:14px;height:14px}
.accordion-body{font-size:14.6px;color:var(--muted);line-height:1.85;padding:6px 22px 20px}

/* ============ safety ============ */
.safety{background:var(--brand-50);border-top:1px solid #D9E7F5;border-bottom:1px solid #D9E7F5}
.safety-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:26px}
.safety-item{background:#fff;border-radius:var(--radius);padding:22px;border:1px solid #DCE9F6;display:flex;gap:14px;align-items:flex-start}
.safety-item i{font-size:18px;color:var(--brand-600);margin-top:3px}
.safety-item strong{display:block;font-size:15.5px;margin-bottom:4px}
.safety-item span{font-size:13.5px;color:var(--muted);line-height:1.7}

/* ============ cta ============ */
.cta-section{background:linear-gradient(180deg,#F7FAFE,#EDF4FB)}
.cta-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:start}
.cta-form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-hover);padding:30px}
.cta-form-card h2{font-size:clamp(22px,2.4vw,29px);line-height:1.4;font-weight:700}
.cta-form-card>p{margin-top:10px;font-size:14.8px;color:var(--muted);line-height:1.8}
.cta-form{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:22px}
.cta-side{display:flex;flex-direction:column;gap:18px}
.contact-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}
.contact-card h3{font-size:17px;font-weight:700;margin-bottom:14px}
.contact-line{display:flex;gap:12px;align-items:flex-start;padding:9px 0;font-size:14.5px;color:#3d4d5d}
.contact-line i{color:var(--brand-600);margin-top:4px;width:16px;text-align:center}
.qr-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;display:flex;gap:18px;align-items:center}
.qr-box{width:104px;height:104px;border-radius:14px;background:repeating-linear-gradient(45deg,#E7EEF7,#E7EEF7 6px,#F4F8FC 6px,#F4F8FC 12px);border:1px solid var(--line);display:grid;place-items:center;color:var(--brand-600);font-size:22px;flex-shrink:0}
.qr-card h4{font-size:15.5px;font-weight:700;margin-bottom:6px}
.qr-card p{font-size:13.5px;color:var(--muted);line-height:1.7}

/* ============ footer ============ */
.site-footer{background:#132030;color:#C3D2E1;padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px;padding-bottom:38px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.footer-brand .brand-mark{background:linear-gradient(150deg,var(--brand-500),var(--brand-600))}
.footer-brand strong{font-size:16.5px;color:#fff;font-weight:700}
.site-footer p.f-desc{font-size:14px;line-height:1.85;color:#9CB0C5;max-width:340px}
.footer-col h4{font-size:14.5px;color:#fff;font-weight:600;margin-bottom:14px}
.footer-col li{margin-bottom:9px}
.footer-col a{font-size:14px;color:#9CB0C5}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.10);padding:18px 0 24px;display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;font-size:13px;color:#8093A8}
.footer-bottom a{color:#9CB0C5}
.footer-bottom a:hover{color:#fff}
.back-top{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:#C3D2E1}

/* ============ responsive ============ */
@media (max-width:1199px){
  .mega-menu{width:720px}
  .hero-grid{gap:32px}
}
@media (max-width:991px){
  .nav-links,.nav-tools .link-quiet,.nav-tools .btn{display:none}
  .nav-toggle{display:inline-flex}
  .nav-inner{min-height:66px}
  .hero{padding:48px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:30px}
  .lead-form{grid-template-columns:1fr}
  .kpi-grid{grid-template-columns:1fr 1fr}
  .kpi-item:nth-child(2){border-right:0}
  .kpi-item:nth-child(1),.kpi-item:nth-child(2){border-bottom:1px solid var(--line)}
  .scene-grid,.wiki-grid,.stories,.cat-grid,.partner-grid{grid-template-columns:1fr 1fr}
  .topic-layout,.feed-layout,.faq-layout,.cta-grid{grid-template-columns:1fr}
  .timeline{grid-template-columns:1fr 1fr}
  .timeline::before{display:none}
  .steps{grid-template-columns:1fr 1fr}
  .compare-grid{grid-template-columns:1fr}
  .safety-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .section{padding:56px 0}
  .cal-row{grid-template-columns:64px 1fr;gap:14px}
  .cal-row .badge-soft{grid-column:2;justify-self:start}
}
@media (max-width:767px){
  body{font-size:15.5px}
  .section{padding:44px 0}
  .hero h1{font-size:26px}
  .hero-lead{font-size:15px}
  .scene-grid,.wiki-grid,.stories,.cat-grid,.partner-grid,.feed-grid,.steps,.timeline,.safety-grid,.footer-grid{grid-template-columns:1fr}
  .kpi-item{border-right:0;border-bottom:1px solid var(--line)}
  .kpi-item:last-child{border-bottom:0}
  .topic-row{grid-template-columns:36px 1fr;}
  .topic-count{grid-column:2;font-size:12px}
  .cta-form{grid-template-columns:1fr}
  .lead-form{grid-template-columns:1fr}
  .faq-side{padding:22px}
  .cta-form-card{padding:22px}
  .qr-card{flex-direction:column;align-items:flex-start}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
}

/* roulang page: category1 */
:root{
  --brand-700:#245A93;--brand-600:#2F6FB2;--brand-500:#4A87C6;--brand-50:#EEF5FC;
  --accent-600:#D9633C;--accent-50:#FDF0E9;
  --ink:#172533;--muted:#5B6B7C;--line:#DDE6F0;--bg:#F5F8FC;--surface:#FFFFFF;
  --success:#2E8B6E;--radius-sm:10px;--radius:16px;--radius-lg:20px;
  --shadow:0 8px 24px rgba(23,37,51,.06);--shadow-hover:0 14px 36px rgba(23,37,51,.10);
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);font-size:16px;line-height:1.75;color:var(--ink);background:var(--bg)}
h1,h2,h3,h4,h5{margin:0;line-height:1.32;font-weight:700;letter-spacing:0}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,border-color .2s ease,transform .18s ease,box-shadow .18s ease}
a:hover{color:var(--brand-700)}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid rgba(47,111,178,.28);outline-offset:2px}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:72px 0}
.section-alt{background:var(--surface)}
.section-line{border-top:1px solid var(--line)}
.sec-head{margin-bottom:32px;max-width:760px}
.sec-tag{display:inline-flex;align-items:center;gap:7px;padding:5px 13px;border-radius:999px;background:var(--brand-50);color:var(--brand-700);font-size:13px;font-weight:600;margin-bottom:14px}
.sec-head h2{font-size:32px;margin-bottom:12px}
.sec-head p{color:var(--muted);font-size:15.5px}
.badge-soft{display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:999px;background:var(--brand-50);color:var(--brand-700);font-size:12.5px;font-weight:600;white-space:nowrap}
.badge-accent{background:var(--accent-50);color:var(--accent-600)}
.badge-success{background:rgba(46,139,110,.12);color:var(--success)}
.badge-grey{background:#EDF1F6;color:var(--muted)}
/* ===== header ===== */
.site-header{position:sticky;top:0;z-index:1030;background:rgba(255,255,255,.97);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid transparent;transition:box-shadow .25s ease,border-color .25s ease}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:0 6px 18px rgba(23,37,51,.06)}
.nav-inner{display:flex;align-items:center;gap:18px;min-height:74px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{width:42px;height:42px;border-radius:13px;background:linear-gradient(150deg,var(--brand-600),var(--brand-500));display:grid;place-items:center;color:#fff;font-size:18px;box-shadow:0 6px 16px rgba(47,111,178,.28)}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:17px;font-weight:700;color:var(--ink)}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted)}
.nav-links{display:none}
.nav-links>li{position:relative}
.nav-links>li>a{display:inline-flex;align-items:center;gap:6px;padding:9px 14px;border-radius:10px;font-size:15px;font-weight:500;color:#2b3b4b}
.nav-links>li>a:hover,.nav-links>li>a:focus{background:var(--brand-50);color:var(--brand-700)}
.nav-links>li>a.active{color:var(--brand-700);background:var(--brand-50);font-weight:600}
.nav-tools{margin-left:auto;display:flex;align-items:center;gap:10px}
.icon-btn{width:40px;height:40px;border-radius:11px;border:1px solid var(--line);background:#fff;display:none;place-items:center;color:var(--muted)}
.icon-btn:hover{border-color:var(--brand-500);color:var(--brand-700);background:var(--brand-50)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:11px 22px;border-radius:var(--radius-sm);font-size:15px;font-weight:600;border:1px solid transparent;transition:transform .18s ease,background .18s ease,box-shadow .18s ease,color .18s ease,border-color .18s ease}
.btn-primary{--bs-btn-bg:var(--brand-600);--bs-btn-border-color:var(--brand-600);--bs-btn-hover-bg:var(--brand-700);--bs-btn-hover-border-color:var(--brand-700);--bs-btn-active-bg:var(--brand-700);--bs-btn-active-border-color:var(--brand-700);--bs-btn-color:#fff;--bs-btn-hover-color:#fff;--bs-btn-active-color:#fff;--bs-btn-disabled-bg:var(--brand-600);--bs-btn-disabled-border-color:var(--brand-600);background:var(--brand-600);border-color:var(--brand-600);color:#fff;box-shadow:0 6px 16px rgba(47,111,178,.22)}
.btn-primary:hover{background:var(--brand-700);border-color:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(47,111,178,.28)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--brand-700);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand-500);background:var(--brand-50);color:var(--brand-700);transform:translateY(-1px)}
.btn-sm{min-height:38px;padding:8px 16px;font-size:14px}
.nav-toggle{width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:#fff;color:var(--ink);display:inline-flex;align-items:center;justify-content:center;font-size:18px}
.nav-toggle:hover{background:var(--brand-50);color:var(--brand-700);border-color:var(--brand-500)}
.mega-menu{position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%);width:840px;max-width:calc(100vw - 40px);background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-hover);padding:24px;display:none;z-index:1050}
.mega-parent:hover>.mega-menu,.mega-parent:focus-within>.mega-menu{display:block}
.mega-grid{display:grid;grid-template-columns:1.1fr 1.1fr .9fr;gap:24px}
.mega-col h4{font-size:13px;font-weight:600;color:var(--muted);margin-bottom:10px}
.mega-col a.mega-link{display:block;padding:9px 12px;border-radius:10px;font-size:15px;color:#2b3b4b}
.mega-col a.mega-link:hover{background:var(--brand-50);color:var(--brand-700)}
.mega-promo{background:var(--brand-50);border-radius:var(--radius);padding:18px}
.mega-promo h5{font-size:16px;font-weight:700;margin-bottom:8px}
.mega-promo p{font-size:13.5px;color:var(--muted);line-height:1.7;margin-bottom:12px}
.mobile-panel{display:none;border-top:1px solid var(--line);background:#fff;max-height:calc(100vh - 74px);overflow-y:auto}
.mobile-panel.open{display:block}
.mobile-panel li a{display:block;padding:12px 20px;font-size:15.5px;color:#2b3b4b}
.mobile-panel li a:hover{background:var(--brand-50);color:var(--brand-700)}
.mobile-panel .m-sub{padding-left:32px;font-size:14.5px;color:var(--muted)}
.mobile-cta{padding:14px 20px 20px;border-top:1px dashed var(--line)}
/* ===== page head ===== */
.page-head{position:relative;padding:44px 0 56px;background:linear-gradient(180deg,var(--brand-50) 0%,#F7FAFE 70%,var(--bg) 100%);overflow:hidden}
.page-head::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(47,111,178,.13) 1px,transparent 1px);background-size:22px 22px;opacity:.5;pointer-events:none}
.page-head .wrap{position:relative;z-index:1}
.page-head-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:40px;align-items:start}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);margin-bottom:16px}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--brand-700)}
.crumb i{font-size:10px;opacity:.6}
.page-head h1{font-size:42px;margin-bottom:14px}
.page-head h1 span{color:var(--brand-700)}
.page-lead{font-size:16.5px;color:#33465a;max-width:640px}
.head-stats{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.head-stats .badge-soft{padding:7px 14px;font-size:13px}
.index-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:22px}
.index-card h3{font-size:16px;margin-bottom:6px}
.index-card .i-note{font-size:13px;color:var(--muted);margin-bottom:14px}
.index-card ol{counter-reset:idx}
.index-card li{counter-increment:idx;border-bottom:1px dashed var(--line)}
.index-card li:last-child{border-bottom:0}
.index-card li a{display:flex;align-items:center;gap:10px;padding:10px 0;font-size:14.5px;color:#2b3b4b}
.index-card li a::before{content:counter(idx,decimal-leading-zero);font-size:12px;font-weight:700;color:var(--brand-600);font-variant-numeric:tabular-nums;background:var(--brand-50);border-radius:7px;padding:2px 6px}
.index-card li a:hover{color:var(--brand-700);padding-left:4px}
/* ===== filter + cards ===== */
.filter-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px}
.filter-chip{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:14px;font-weight:500;color:#2b3b4b}
.filter-chip:hover{border-color:var(--brand-500);color:var(--brand-700);background:var(--brand-50)}
.filter-chip.is-on{background:var(--brand-600);border-color:var(--brand-600);color:#fff;box-shadow:0 6px 16px rgba(47,111,178,.22)}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.scene-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;display:flex;flex-direction:column;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.scene-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#CBDCEB}
.scene-card .thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--brand-50)}
.scene-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.scene-card:hover .thumb img{transform:scale(1.03)}
.scene-card .thumb .badge-soft{position:absolute;left:12px;top:12px;background:rgba(255,255,255,.94);backdrop-filter:blur(4px)}
.scene-body{padding:18px;display:flex;flex-direction:column;gap:10px;flex:1}
.scene-body h3{font-size:18px}
.scene-body h3 a:hover{color:var(--brand-700)}
.scene-body p{font-size:14.5px;color:var(--muted);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.scene-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--muted);margin-top:auto;padding-top:8px;border-top:1px dashed var(--line)}
.scene-meta i{color:var(--brand-500);margin-right:4px}
.more-row{display:flex;justify-content:center;margin-top:34px}
/* ===== steps ===== */
.step-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px 24px;position:relative;transition:transform .2s ease,box-shadow .2s ease}
.step-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.step-num{width:44px;height:44px;border-radius:13px;background:var(--brand-50);color:var(--brand-700);display:grid;place-items:center;font-weight:700;font-size:17px;font-variant-numeric:tabular-nums;margin-bottom:16px}
.step-card h3{font-size:18px;margin-bottom:8px}
.step-card p{font-size:14.5px;color:var(--muted)}
/* ===== topics + tags ===== */
.two-col{display:grid;grid-template-columns:1.35fr .65fr;gap:28px;align-items:start}
.topic-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:8px 22px}
.topic-item{display:flex;gap:16px;align-items:flex-start;padding:18px 0;border-bottom:1px solid var(--line)}
.topic-item:last-child{border-bottom:0}
.topic-rank{flex:0 0 30px;font-size:16px;font-weight:700;color:var(--brand-500);font-variant-numeric:tabular-nums}
.topic-item:nth-child(-n+3) .topic-rank{color:var(--accent-600)}
.topic-main{flex:1;min-width:0}
.topic-main h3{font-size:16.5px;font-weight:600;margin-bottom:6px}
.topic-main h3 a:hover{color:var(--brand-700)}
.topic-sub{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--muted)}
.tag-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:22px}
.tag-box h3{font-size:16px;margin-bottom:14px}
.tag-cloud{display:flex;flex-wrap:wrap;gap:9px}
.tag-cloud span{display:inline-block;padding:6px 13px;border-radius:999px;background:#F0F3F8;color:#41556a;font-size:13.5px;transition:background .2s ease,color .2s ease}
.tag-cloud span:hover{background:var(--brand-50);color:var(--brand-700)}
.tag-note{margin-top:18px;padding:14px;border-radius:var(--radius-sm);background:var(--accent-50);color:#8a4a30;font-size:13.5px;line-height:1.7}
/* ===== reading cards ===== */
.read-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.read-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px;display:flex;flex-direction:column;gap:12px;transition:transform .2s ease,box-shadow .2s ease}
.read-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.read-card h3{font-size:17.5px;line-height:1.55}
.read-card h3 a:hover{color:var(--brand-700)}
.read-card p{font-size:14.5px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.read-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13px;color:var(--muted);margin-top:auto;padding-top:10px;border-top:1px dashed var(--line)}
/* ===== category entries ===== */
.cat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.cat-card{display:flex;align-items:center;gap:18px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:24px;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.cat-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#CBDCEB}
.cat-ico{flex:0 0 52px;width:52px;height:52px;border-radius:15px;display:grid;place-items:center;font-size:20px;background:var(--brand-50);color:var(--brand-700)}
.cat-card:nth-child(2) .cat-ico{background:var(--accent-50);color:var(--accent-600)}
.cat-card h3{font-size:18px;margin-bottom:4px}
.cat-card p{font-size:14px;color:var(--muted)}
.cat-arrow{margin-left:auto;color:var(--brand-500);font-size:15px}
/* ===== faq ===== */
.faq-wrap{display:grid;grid-template-columns:.85fr 1.15fr;gap:36px;align-items:start}
.accordion-item{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;box-shadow:var(--shadow);margin-bottom:14px}
.accordion-button{font-size:16px;font-weight:600;color:var(--ink);background:#fff;padding:18px 20px;box-shadow:none!important}
.accordion-button:not(.collapsed){background:var(--brand-50);color:var(--brand-700)}
.accordion-button::after{background-size:14px;width:14px;height:14px}
.accordion-body{font-size:14.5px;color:var(--muted);padding:4px 20px 20px;line-height:1.8}
/* ===== subscribe ===== */
.sub-band{background:linear-gradient(120deg,#E9F2FB 0%,#F7FAFE 60%,var(--accent-50) 100%);border-radius:var(--radius-lg);border:1px solid var(--line);padding:40px}
.sub-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:start}
.sub-copy h2{font-size:30px;margin-bottom:12px}
.sub-copy p{color:var(--muted);font-size:15px;margin-bottom:16px}
.sub-list li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:#33465a;margin-bottom:10px}
.sub-list i{color:var(--success);margin-top:5px;font-size:13px}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:600;color:#33465a;margin-bottom:7px}
.field .form-control,.field .form-select{min-height:46px;border-radius:var(--radius-sm);border:1px solid var(--line);font-size:15px;padding:10px 14px;color:var(--ink);background:#fff}
.field .form-control:focus,.field .form-select:focus{border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(47,111,178,.16);outline:none}
.form-hint{font-size:12.5px;color:var(--muted);margin-top:10px;line-height:1.7}
/* ===== footer ===== */
.site-footer{background:#142A3D;color:rgba(255,255,255,.74);margin-top:0;padding:56px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.12)}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:14px}
.footer-brand .brand-mark{width:38px;height:38px;border-radius:11px;font-size:16px}
.footer-brand strong{color:#fff;font-size:16.5px}
.f-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);max-width:340px}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:14px;font-weight:600}
.footer-col li{margin-bottom:9px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.68)}
.footer-col a:hover{color:#fff}
.footer-bottom{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;padding-top:22px;font-size:13px;color:rgba(255,255,255,.55)}
.back-top{color:rgba(255,255,255,.75);font-size:13px}
.back-top:hover{color:#fff}
/* ===== responsive ===== */
@media (min-width:992px){
  .nav-links{display:flex;align-items:center;gap:4px;margin-left:14px}
  .icon-btn{display:grid}
  .nav-toggle{display:none}
  .mobile-panel{display:none!important}
}
@media (max-width:1199.98px){
  .card-grid{grid-template-columns:repeat(3,1fr);gap:20px}
  .page-head h1{font-size:38px}
}
@media (max-width:991.98px){
  .section{padding:52px 0}
  .page-head{padding:34px 0 46px}
  .page-head-grid{grid-template-columns:1fr;gap:26px}
  .page-head h1{font-size:32px}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .step-grid{grid-template-columns:1fr}
  .read-grid{grid-template-columns:1fr 1fr}
  .two-col{grid-template-columns:1fr}
  .faq-wrap{grid-template-columns:1fr;gap:20px}
  .sub-grid{grid-template-columns:1fr;gap:26px}
  .cat-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .sec-head h2{font-size:26px}
  .sub-copy h2{font-size:24px}
}
@media (max-width:767.98px){
  body{font-size:15.5px}
  .section{padding:44px 0}
  .page-head h1{font-size:27px}
  .page-lead{font-size:15px}
  .card-grid{grid-template-columns:1fr}
  .read-grid{grid-template-columns:1fr}
  .head-stats .badge-soft{font-size:12.5px;padding:6px 12px}
  .btn{width:100%}
  .more-row .btn{width:auto}
  .sub-band{padding:26px 20px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .topic-list{padding:6px 16px}
}

/* roulang page: article */
:root{
  --brand-700:#245A93;--brand-600:#2F6FB2;--brand-500:#4A87C6;--brand-50:#EEF5FC;
  --accent-600:#D9633C;--accent-50:#FDF0E9;
  --ink:#172533;--muted:#5B6B7C;--line:#DDE6F0;--bg:#F5F8FC;--surface:#FFFFFF;
  --success:#2E8B6E;--radius-sm:10px;--radius:16px;--radius-lg:20px;
  --shadow:0 8px 24px rgba(23,37,51,.06);--shadow-hover:0 14px 36px rgba(23,37,51,.10);
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);font-size:16px;line-height:1.75;color:var(--ink);background:var(--bg)}
h1,h2,h3,h4,h5,h6,p{margin:0}
ul,ol{list-style:none;margin:0;padding:0}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand-700)}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid rgba(47,111,178,.35);outline-offset:2px}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.num{font-variant-numeric:tabular-nums}
/* ============ header ============ */
.site-header{position:sticky;top:0;z-index:1030;background:rgba(255,255,255,.96);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid transparent;transition:box-shadow .25s ease,border-color .25s ease}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:0 6px 18px rgba(23,37,51,.06)}
.nav-inner{display:flex;align-items:center;gap:18px;min-height:74px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{width:42px;height:42px;border-radius:13px;background:linear-gradient(150deg,var(--brand-600),var(--brand-500));display:grid;place-items:center;color:#fff;font-size:18px;box-shadow:0 6px 16px rgba(47,111,178,.28)}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:17px;font-weight:700;color:var(--ink)}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted)}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:14px}
.nav-links>li{position:relative}
.nav-links>li>a{display:inline-flex;align-items:center;gap:6px;padding:9px 14px;border-radius:10px;font-size:15px;font-weight:500;color:#2b3b4b}
.nav-links>li>a:hover,.nav-links>li>a:focus{background:var(--brand-50);color:var(--brand-700)}
.nav-links>li>a.active{color:var(--brand-700);background:var(--brand-50);font-weight:600}
.nav-tools{margin-left:auto;display:flex;align-items:center;gap:10px}
.icon-btn{width:40px;height:40px;border-radius:11px;border:1px solid var(--line);background:#fff;display:grid;place-items:center;color:var(--muted);transition:.2s}
.icon-btn:hover{border-color:var(--brand-500);color:var(--brand-700);background:var(--brand-50)}
.login-link{font-size:14.5px;font-weight:500;color:#31465c;padding:8px 6px;white-space:nowrap}
.login-link:hover{color:var(--brand-700)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:11px 22px;border-radius:var(--radius-sm);font-size:15px;font-weight:600;border:1px solid transparent;transition:transform .18s ease,background .18s ease,box-shadow .18s ease,color .18s ease,border-color .18s ease}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 6px 16px rgba(47,111,178,.22)}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(47,111,178,.28)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--brand-700);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand-500);background:var(--brand-50);color:var(--brand-700)}
.btn-accent{background:var(--accent-600);color:#fff}
.btn-accent:hover{background:#c2542f;color:#fff;transform:translateY(-1px)}
.btn-block{width:100%}
.btn-sm{min-height:38px;padding:8px 16px;font-size:14px}
.text-link{color:var(--brand-700);font-weight:600;font-size:14.5px;border-bottom:1px solid transparent;display:inline-block}
.text-link:hover{color:var(--brand-700);border-bottom-color:var(--brand-500)}
.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:#fff;color:var(--ink);align-items:center;justify-content:center;font-size:18px}
/* mega menu */
.mega-menu{position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%);width:840px;max-width:calc(100vw - 40px);background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-hover);padding:24px;display:none;z-index:1050}
.mega-parent:hover>.mega-menu,.mega-parent:focus-within>.mega-menu{display:block}
.mega-grid{display:grid;grid-template-columns:1.1fr 1.1fr .9fr;gap:24px}
.mega-col h4{font-size:13px;font-weight:600;color:var(--muted);margin-bottom:10px}
.mega-col a.mega-link{display:block;padding:9px 12px;border-radius:10px;font-size:15px;color:#2b3b4b}
.mega-col a.mega-link:hover{background:var(--brand-50);color:var(--brand-700)}
.mega-promo{background:var(--brand-50);border-radius:var(--radius);padding:18px}
.mega-promo h5{font-size:16px;font-weight:700;margin-bottom:8px;color:var(--ink)}
.mega-promo p{font-size:13.5px;color:var(--muted);line-height:1.7;margin-bottom:12px}
/* mobile panel */
.mobile-panel{display:none;border-top:1px solid var(--line);background:#fff}
.mobile-panel.open{display:block}
.mobile-panel li a{display:block;padding:12px 20px;font-size:15.5px;color:#2b3b4b}
.mobile-panel li a:hover{background:var(--brand-50);color:var(--brand-700)}
.mobile-panel .m-sub{padding-left:34px;font-size:14.5px;color:var(--muted)}
.mobile-cta{padding:14px 20px 20px;border-top:1px dashed var(--line)}
/* ============ 通用组件 ============ */
.section{padding:72px 0}
.section-alt{background:var(--surface)}
.sec-tag{display:inline-flex;align-items:center;gap:7px;padding:5px 13px;border-radius:999px;background:var(--brand-50);color:var(--brand-700);font-size:13px;font-weight:600;margin-bottom:14px}
.badge-soft{display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:999px;background:var(--brand-50);color:var(--brand-700);font-size:12.5px;font-weight:600;white-space:nowrap}
.badge-accent{background:var(--accent-50);color:var(--accent-600)}
.badge-success{background:rgba(46,139,110,.12);color:var(--success)}
.badge-grey{background:#EEF1F5;color:var(--muted)}
.tag{display:inline-flex;align-items:center;padding:6px 14px;border-radius:999px;background:#EEF1F5;color:#40536a;font-size:13.5px;transition:.2s}
.tag:hover{background:var(--brand-50);color:var(--brand-700)}
.sec-head{max-width:720px;margin-bottom:34px}
.sec-head h2{font-size:30px;line-height:1.4;font-weight:700;color:var(--ink)}
.sec-head p{margin-top:10px;font-size:15.5px;color:var(--muted)}
/* ============ 文章头部 ============ */
.article-head{position:relative;padding:38px 0 46px;background:linear-gradient(180deg,#F1F7FE 0%,#F7FAFE 68%,var(--bg) 100%);border-bottom:1px solid var(--line);overflow:hidden}
.article-head::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(47,111,178,.13) 1px,transparent 1px);background-size:24px 24px;opacity:.55;pointer-events:none}
.article-head .wrap{position:relative;z-index:1;max-width:900px}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);margin-bottom:16px}
.crumbs a:hover{color:var(--brand-700)}
.crumbs .sep{color:#B9C6D4}
.crumbs .current{max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#3a4c5f}
.article-head h1{font-size:clamp(26px,3.2vw,40px);line-height:1.38;font-weight:700;margin:6px 0 16px;color:var(--ink)}
.article-head .lead{font-size:16px;line-height:1.85;color:var(--muted);max-width:740px}
.article-meta{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:22px;font-size:13.5px;color:var(--muted)}
.article-meta span{display:inline-flex;align-items:center;gap:7px}
.article-meta i{color:var(--brand-500)}
/* ============ 文章主体布局 ============ */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 288px;gap:44px;align-items:start;padding-top:44px;padding-bottom:76px}
.article-col{min-width:0;max-width:780px}
.cover-figure{margin:0 0 34px}
.cover-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow)}
.cover-figure figcaption{margin-top:10px;font-size:13px;color:var(--muted);text-align:center}
.article-body{font-size:16.5px;line-height:1.9;color:#22313F}
.article-body>*:first-child{margin-top:0}
.article-body h2{font-size:23px;line-height:1.5;font-weight:700;color:var(--ink);margin:38px 0 14px;padding-left:14px;border-left:4px solid var(--brand-500)}
.article-body h3{font-size:18.5px;font-weight:600;color:var(--ink);margin:28px 0 10px}
.article-body h4{font-size:16.5px;font-weight:600;color:var(--ink);margin:22px 0 8px}
.article-body p{margin:0 0 18px}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:24px}
.article-body ul li{list-style:disc;margin-bottom:8px}
.article-body ol li{list-style:decimal;margin-bottom:8px}
.article-body blockquote{margin:24px 0;padding:16px 22px;background:var(--brand-50);border-left:4px solid var(--brand-500);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:#2b4257}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--radius);margin:22px 0;box-shadow:var(--shadow)}
.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-700);border-bottom:1px solid rgba(47,111,178,.4)}
.article-body a:hover{color:var(--brand-600);border-bottom-color:var(--brand-600)}
.article-body hr{border:none;border-top:1px solid var(--line);margin:34px 0}
.article-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body thead th{background:var(--brand-50);color:var(--brand-700);font-weight:600}
.article-body tbody tr:nth-child(even){background:#FAFCFE}
.article-body code{background:#EEF2F7;padding:2px 6px;border-radius:6px;font-size:14px}
.article-body .note,.article-body .tip{margin:22px 0;padding:14px 18px;background:var(--accent-50);border:1px solid #F6DCCF;border-radius:var(--radius-sm);font-size:15px;color:#8A4527}
/* 空态 */
.empty-state{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:56px 32px;text-align:center}
.empty-state i{font-size:34px;color:var(--brand-500);margin-bottom:14px}
.empty-state h2{font-size:21px;font-weight:700;margin-bottom:10px}
.empty-state p{font-size:15px;color:var(--muted);max-width:460px;margin:0 auto 20px}
/* 文末 */
.article-foot{margin-top:36px;padding-top:26px;border-top:1px solid var(--line)}
.foot-title{font-size:14px;font-weight:600;color:var(--muted);margin-bottom:12px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}
.share-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:22px}
.share-row .label{font-size:13.5px;color:var(--muted);margin-right:2px}
.share-btn{display:inline-flex;align-items:center;gap:7px;min-height:42px;padding:8px 16px;border-radius:10px;border:1px solid var(--line);background:#fff;color:#31465c;font-size:14px;font-weight:500;transition:.2s}
.share-btn:hover{border-color:var(--brand-500);background:var(--brand-50);color:var(--brand-700)}
/* 作者卡 */
.author-card{display:flex;gap:18px;align-items:flex-start;margin-top:30px;padding:24px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.author-avatar{width:62px;height:62px;border-radius:50%;flex-shrink:0;overflow:hidden;display:grid;place-items:center;background:var(--brand-50);color:var(--brand-600);font-size:22px}
.author-info h3{font-size:17px;font-weight:700;display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:6px}
.author-info p{font-size:14.5px;color:var(--muted);line-height:1.8}
.author-stats{display:flex;flex-wrap:wrap;gap:10px 18px;margin-top:10px;font-size:13px;color:var(--muted)}
/* 上下篇 */
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:30px}
.post-nav a{display:block;padding:18px 20px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);transition:.22s}
.post-nav a:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#C9DBEC}
.post-nav .dir{font-size:12.5px;color:var(--muted);display:block;margin-bottom:6px}
.post-nav .ttl{font-size:15px;font-weight:600;color:var(--ink);line-height:1.6}
.post-nav a:hover .ttl{color:var(--brand-700)}
.back-entry{margin-top:22px;text-align:center}
/* 评论区 */
.comment-block{margin-top:34px;padding:26px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow)}
.comment-head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--line);margin-bottom:20px}
.comment-head h2{font-size:19px;font-weight:700}
.sort-tabs{display:inline-flex;gap:6px;background:#F1F5FA;padding:4px;border-radius:999px}
.sort-tabs span{padding:5px 14px;border-radius:999px;font-size:13px;color:var(--muted);cursor:pointer}
.sort-tabs span.active{background:#fff;color:var(--brand-700);font-weight:600;box-shadow:0 2px 6px rgba(23,37,51,.08)}
.comment-form textarea{width:100%;min-height:104px;padding:14px 16px;border:1px solid var(--line);border-radius:var(--radius-sm);background:#FBFDFF;font-size:15px;line-height:1.8;resize:vertical;transition:.2s}
.comment-form textarea:focus{outline:none;border-color:var(--brand-500);background:#fff;box-shadow:0 0 0 3px rgba(47,111,178,.14)}
.comment-form-foot{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;margin-top:12px}
.comment-form-foot .hint{font-size:13px;color:var(--muted)}
.comment-empty{margin-top:24px;padding:30px 20px;text-align:center;background:#FAFCFE;border:1px dashed var(--line);border-radius:var(--radius)}
.comment-empty i{font-size:26px;color:#A9BDD1;margin-bottom:8px}
.comment-empty p{font-size:14.5px;color:var(--muted)}
/* 侧栏 */
.article-side{position:sticky;top:96px}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);margin-bottom:20px}
.side-card h3{font-size:15px;font-weight:700;display:flex;align-items:center;gap:8px;padding-bottom:12px;margin-bottom:12px;border-bottom:1px solid var(--line);color:var(--ink)}
.side-card h3 i{color:var(--brand-500)}
.toc-link{display:block;padding:7px 10px;border-radius:8px;font-size:14px;color:#38495c;line-height:1.6;border-left:2px solid transparent}
.toc-link:hover{background:var(--brand-50);color:var(--brand-700);border-left-color:var(--brand-500)}
.toc-h3{padding-left:22px;font-size:13.5px;color:var(--muted)}
.toc-empty{font-size:13.5px;color:var(--muted);line-height:1.7}
.side-list li{position:relative;padding-left:22px;margin-bottom:10px;font-size:14px;color:#46596C;line-height:1.7}
.side-list li i{position:absolute;left:0;top:4px;color:var(--success);font-size:12px}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
/* 相关推荐 */
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin-top:30px}
.post-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 .22s ease,box-shadow .22s ease,border-color .22s ease}
a.post-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#C9DBEC;color:inherit}
.post-card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--brand-50)}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
a.post-card:hover .thumb img{transform:scale(1.04)}
.post-card .body{padding:16px 18px 20px;display:flex;flex-direction:column;gap:10px}
.post-card h3{font-size:16.5px;font-weight:600;line-height:1.6;color:var(--ink)}
a.post-card:hover h3{color:var(--brand-700)}
.post-card p{font-size:14px;color:var(--muted);line-height:1.75}
.post-card .meta{font-size:12.5px;color:#8194A6;display:flex;align-items:center;gap:10px;margin-top:auto}
/* CTA 条 */
.cta-band{background:linear-gradient(135deg,var(--brand-700),var(--brand-600));color:#fff;padding:54px 0}
.cta-inner{display:flex;flex-wrap:wrap;gap:26px;align-items:center;justify-content:space-between}
.cta-band h2{font-size:26px;font-weight:700;color:#fff;margin-bottom:10px}
.cta-band p{font-size:15px;line-height:1.8;color:rgba(255,255,255,.84);max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.cta-band .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.14);color:#fff;border-color:#fff}
/* ============ footer ============ */
.site-footer{background:#132232;color:#C4D1DE;padding:58px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:34px;padding-bottom:38px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.footer-brand strong{color:#fff;font-size:17px;font-weight:700}
.footer-brand .brand-mark{width:38px;height:38px;border-radius:12px;font-size:16px}
.f-desc{font-size:14px;line-height:1.85;color:#9FB0C1;max-width:340px}
.footer-col h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:14px}
.footer-col li{margin-bottom:9px}
.footer-col li a{font-size:14px;color:#A9B9C8}
.footer-col li a:hover{color:#fff}
.footer-bottom{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;padding:18px 0 22px;border-top:1px solid rgba(255,255,255,.1);font-size:13px;color:#8FA2B4}
.back-top{color:#C4D1DE;display:inline-flex;align-items:center;gap:6px}
.back-top:hover{color:#fff}
/* ============ 响应式 ============ */
@media (max-width:1199px){
  .wrap{max-width:1140px}
  .article-layout{gap:34px}
}
@media (max-width:991px){
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .nav-tools .btn-primary{display:none}
  .login-link{display:none}
  .article-layout{grid-template-columns:1fr;gap:34px}
  .article-side{position:static}
  .article-col{max-width:none}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .cta-inner{align-items:flex-start}
}
@media (max-width:767px){
  .section{padding:44px 0}
  .article-head{padding:26px 0 32px}
  .article-head h1{font-size:24px;line-height:1.45}
  .article-head .lead{font-size:15px}
  .article-layout{padding-top:26px;padding-bottom:52px}
  .article-body{font-size:16px;line-height:1.85}
  .article-body h2{font-size:20px;margin-top:30px}
  .article-body h3{font-size:17px}
  .article-body table{font-size:14px}
  .article-body th,.article-body td{padding:8px 10px}
  .related-grid{grid-template-columns:1fr}
  .post-nav{grid-template-columns:1fr}
  .author-card{flex-direction:column;gap:14px}
  .comment-block{padding:20px 18px}
  .sec-head h2{font-size:24px}
  .cta-band{padding:40px 0}
  .cta-band h2{font-size:22px}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .btn{min-height:46px}
}
@media (max-width:420px){
  .wrap{padding:0 16px}
  .article-meta{gap:6px 14px;font-size:13px}
  .share-btn{width:100%;justify-content:center}
}

/* roulang page: category3 */
:root{
  --brand-700:#245A93;--brand-600:#2F6FB2;--brand-500:#4A87C6;--brand-50:#EEF5FC;
  --accent-600:#D9633C;--accent-50:#FDF0E9;
  --ink:#172533;--muted:#5B6B7C;--line:#DDE6F0;--bg:#F5F8FC;--surface:#FFFFFF;
  --success:#2E8B6E;--radius-sm:10px;--radius:16px;--radius-lg:20px;
  --shadow:0 8px 24px rgba(23,37,51,.06);--shadow-hover:0 14px 36px rgba(23,37,51,.10);
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);font-size:16px;line-height:1.75;color:var(--ink);background:var(--bg)}
h1,h2,h3,h4,h5,h6{margin:0;font-weight:700;line-height:1.35;letter-spacing:0}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,border-color .2s ease}
a:hover{color:var(--brand-700)}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid rgba(47,111,178,.25);outline-offset:2px}
.container,.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.num{font-variant-numeric:tabular-nums}
/* ============ header ============ */
.site-header{position:sticky;top:0;z-index:1030;background:rgba(255,255,255,.97);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid transparent;transition:box-shadow .25s ease,border-color .25s ease}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:0 6px 18px rgba(23,37,51,.06)}
.nav-inner{display:flex;align-items:center;gap:18px;min-height:74px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{width:42px;height:42px;border-radius:13px;background:linear-gradient(150deg,var(--brand-600),var(--brand-500));display:grid;place-items:center;color:#fff;font-size:18px;box-shadow:0 6px 16px rgba(47,111,178,.28)}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:16.5px;font-weight:700;color:var(--ink)}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted)}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:14px}
.nav-links>li{position:relative}
.nav-links>li>a{display:inline-flex;align-items:center;gap:6px;padding:9px 14px;border-radius:10px;font-size:15px;font-weight:500;color:#2b3b4b}
.nav-links>li>a:hover,.nav-links>li>a:focus{background:var(--brand-50);color:var(--brand-700)}
.nav-links>li>a.active{color:var(--brand-700);background:var(--brand-50);font-weight:600}
.nav-tools{margin-left:auto;display:flex;align-items:center;gap:10px}
.icon-btn{width:40px;height:40px;border-radius:11px;border:1px solid var(--line);background:#fff;display:grid;place-items:center;color:var(--muted)}
.icon-btn:hover{border-color:var(--brand-500);color:var(--brand-700);background:var(--brand-50)}
.login-link{font-size:15px;font-weight:500;color:#2b3b4b;padding:8px 6px}
.login-link:hover{color:var(--brand-700)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:11px 22px;border-radius:var(--radius-sm);font-size:15px;font-weight:600;border:1px solid transparent;transition:transform .18s ease,background .18s ease,box-shadow .18s ease,color .18s ease,border-color .18s ease;text-align:center}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 6px 16px rgba(47,111,178,.22)}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(47,111,178,.28)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--brand-700);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand-500);background:var(--brand-50);color:var(--brand-700)}
.btn-accent{background:var(--accent-600);color:#fff}
.btn-accent:hover{background:#c2542f;color:#fff;transform:translateY(-1px)}
.btn-block{width:100%}
.btn-sm{min-height:38px;padding:8px 16px;font-size:14px}
.text-link{color:var(--brand-700);font-weight:600;font-size:15px;border-bottom:1px solid transparent;display:inline-flex;align-items:center;gap:7px}
.text-link:hover{color:var(--brand-700);border-bottom-color:var(--brand-500)}
.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:#fff;color:var(--ink);align-items:center;justify-content:center;font-size:18px}
/* mega menu */
.mega-menu{position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%);width:840px;max-width:calc(100vw - 40px);background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-hover);padding:24px;display:none;z-index:1050}
.mega-parent:hover>.mega-menu,.mega-parent:focus-within>.mega-menu{display:block}
.mega-grid{display:grid;grid-template-columns:1.1fr 1.1fr .9fr;gap:24px}
.mega-col h4{font-size:13px;font-weight:600;color:var(--muted);margin-bottom:10px}
.mega-col a.mega-link{display:block;padding:9px 12px;border-radius:10px;font-size:15px;color:#2b3b4b}
.mega-col a.mega-link:hover{background:var(--brand-50);color:var(--brand-700)}
.mega-promo{background:var(--brand-50);border-radius:var(--radius);padding:18px}
.mega-promo h5{font-size:16px;font-weight:700;margin-bottom:8px}
.mega-promo p{font-size:13.5px;color:var(--muted);line-height:1.7;margin-bottom:12px}
/* mobile nav */
.mobile-panel{display:none;border-top:1px solid var(--line);background:#fff;max-height:calc(100vh - 74px);overflow-y:auto}
.mobile-panel.open{display:block}
.mobile-panel ul{padding:10px 0}
.mobile-panel li a{display:block;padding:12px 20px;font-size:15.5px;color:#2b3b4b}
.mobile-panel li a:hover{background:var(--brand-50);color:var(--brand-700)}
.mobile-panel .m-sub{padding-left:32px;font-size:14.5px;color:var(--muted)}
.mobile-cta{padding:14px 20px 20px;border-top:1px dashed var(--line)}
/* ============ base section ============ */
.section{padding:72px 0}
.section-alt{background:var(--surface)}
.section-line{border-top:1px solid var(--line)}
.sec-head{margin-bottom:34px;max-width:760px}
.sec-tag{display:inline-flex;align-items:center;gap:7px;padding:5px 13px;border-radius:999px;background:var(--brand-50);color:var(--brand-700);font-size:13px;font-weight:600;margin-bottom:14px}
.sec-head h2{font-size:clamp(23px,2.6vw,31px);margin-bottom:10px}
.sec-head p{color:var(--muted);font-size:15.5px}
.badge-soft{display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:999px;background:var(--brand-50);color:var(--brand-700);font-size:12.5px;font-weight:600;white-space:nowrap}
.badge-accent{background:var(--accent-50);color:var(--accent-600)}
.badge-success{background:rgba(46,139,110,.12);color:var(--success)}
.badge-grey{background:#EEF1F5;color:var(--muted)}
/* ============ page head ============ */
.page-head{position:relative;padding:38px 0 58px;background:linear-gradient(180deg,#EAF3FB 0%,#F4F8FD 70%,var(--bg) 100%);overflow:hidden}
.page-head::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(47,111,178,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(47,111,178,.07) 1px,transparent 1px);background-size:44px 44px;mask-image:linear-gradient(180deg,#000,transparent 85%);pointer-events:none}
.page-head .wrap{position:relative;z-index:1}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);margin-bottom:20px}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--brand-700)}
.crumbs .sep{color:#A9B8C7}
.head-grid{display:grid;grid-template-columns:1.45fr .55fr;gap:36px;align-items:start}
.page-head h1{font-size:clamp(27px,4vw,42px);line-height:1.28;margin-bottom:14px}
.page-head h1 .hl{color:var(--brand-700)}
.head-lead{font-size:16.5px;color:#3B4F63;max-width:640px;margin-bottom:18px}
.meta-badges{display:flex;flex-wrap:wrap;gap:9px}
.meta-badges .badge-soft{padding:6px 13px;font-size:13px}
.city-badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.city-badges a{display:inline-flex;align-items:center;gap:6px;padding:6px 13px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#3B4F63;box-shadow:0 2px 6px rgba(23,37,51,.04)}
.city-badges a:hover{border-color:var(--brand-500);background:var(--brand-50);color:var(--brand-700)}
.quick-index{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:22px;position:sticky;top:96px}
.quick-index h2{font-size:15px;font-weight:700;margin-bottom:6px}
.quick-index .qi-sub{font-size:12.5px;color:var(--muted);margin-bottom:14px}
.quick-index ul{display:grid;gap:2px}
.quick-index li a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:9px 10px;border-radius:9px;font-size:14px;color:#2b3b4b}
.quick-index li a i{font-size:11px;color:#9FB0C1}
.quick-index li a:hover{background:var(--brand-50);color:var(--brand-700)}
.quick-index .qi-foot{margin-top:14px;padding-top:14px;border-top:1px dashed var(--line);font-size:12.5px;color:var(--muted)}
/* ============ timeline ============ */
.timeline-toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:22px}
.chip{display:inline-flex;align-items:center;gap:6px;padding:7px 15px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13.5px;color:#3B4F63}
.chip:hover{border-color:var(--brand-500);color:var(--brand-700);background:var(--brand-50)}
.chip.on{background:var(--brand-600);border-color:var(--brand-600);color:#fff}
.timeline{display:grid;gap:14px}
.tl-item{display:grid;grid-template-columns:82px minmax(0,1fr) auto;gap:20px;align-items:center;padding:20px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.tl-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#C9DAEA}
.tl-item:active{transform:translateY(0)}
.tl-date{background:var(--brand-50);border-radius:12px;padding:10px 4px;text-align:center;color:var(--brand-700)}
.tl-date .d{display:block;font-size:24px;font-weight:700;line-height:1.1}
.tl-date .m{display:block;font-size:12px;font-weight:600;color:#4B6C8C}
.tl-body h3{font-size:18.5px;margin-bottom:6px}
.tl-body h3 a:hover{color:var(--brand-700)}
.tl-meta{display:flex;flex-wrap:wrap;gap:8px 14px;font-size:13px;color:var(--muted)}
.tl-meta span{display:inline-flex;align-items:center;gap:6px}
.tl-side{display:flex;flex-direction:column;align-items:flex-end;gap:8px;text-align:right}
.tl-side .count{font-size:12.5px;color:var(--muted)}
.list-more{display:flex;justify-content:center;margin-top:28px}
/* ============ map block ============ */
.map-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:30px;align-items:center}
.map-figure{margin:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);overflow:hidden}
.map-figure img{width:100%;aspect-ratio:16/9;object-fit:cover}
.map-figure figcaption{padding:13px 18px;font-size:13px;color:var(--muted);border-top:1px solid var(--line);background:#FCFDFF}
.map-copy h2{font-size:clamp(22px,2.5vw,30px);margin-bottom:12px}
.map-copy p{color:var(--muted);font-size:15.5px}
.city-tags{display:flex;flex-wrap:wrap;gap:9px;margin-top:18px}
.city-tags span{display:inline-flex;align-items:center;gap:7px;padding:8px 15px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13.5px;font-weight:500;color:#2b3b4b;box-shadow:0 2px 6px rgba(23,37,51,.04)}
.city-tags span i{color:var(--brand-500);font-size:12px}
/* ============ steps ============ */
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;counter-reset:step}
.step-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px 22px;transition:transform .2s ease,box-shadow .2s ease}
.step-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.step-num{width:38px;height:38px;border-radius:50%;background:var(--brand-50);color:var(--brand-700);display:grid;place-items:center;font-weight:700;font-size:15px;margin-bottom:14px;border:1px solid #D5E5F4}
.step-card h3{font-size:19px;margin-bottom:8px}
.step-card p{font-size:14.5px;color:var(--muted);line-height:1.7}
.step-card::after{content:"";position:absolute;top:44px;right:-11px;width:22px;height:1px;background:#C9DAEA}
.step-card:last-child::after{display:none}
/* ============ reviews ============ */
.reviews{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.review-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px;display:flex;flex-direction:column;gap:12px;transition:transform .2s ease,box-shadow .2s ease}
.review-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.review-top{display:flex;align-items:center;gap:11px}
.avatar{width:42px;height:42px;border-radius:50%;background:linear-gradient(150deg,var(--brand-500),var(--brand-600));color:#fff;display:grid;place-items:center;font-weight:700;font-size:15px;flex-shrink:0}
.review-top .who{line-height:1.35}
.review-top .who strong{display:block;font-size:14.5px}
.review-top .who span{font-size:12.5px;color:var(--muted)}
.review-quote{font-size:14.5px;color:#33485C;line-height:1.75;margin:0}
.stars{color:#E7A93C;font-size:12px;letter-spacing:2px}
/* ============ channel entry ============ */
.channel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.channel-card{display:flex;flex-direction:column;justify-content:space-between;gap:16px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.channel-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#C9DAEA;color:var(--ink)}
.channel-card .ic{width:42px;height:42px;border-radius:12px;background:var(--brand-50);color:var(--brand-700);display:grid;place-items:center;font-size:17px}
.channel-card h3{font-size:18px;margin-bottom:6px}
.channel-card p{font-size:14px;color:var(--muted);margin:0}
.channel-card .more{font-size:13.5px;font-weight:600;color:var(--brand-700);display:inline-flex;align-items:center;gap:6px}
/* ============ faq ============ */
.faq-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:36px;align-items:start}
.faq-side h2{font-size:clamp(22px,2.5vw,30px);margin-bottom:12px}
.faq-side p{color:var(--muted);font-size:15px}
.faq-side .faq-note{margin-top:18px;background:var(--brand-50);border:1px solid #D8E7F6;border-radius:var(--radius);padding:16px 18px;font-size:13.5px;color:#33526E}
.accordion-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius)!important;box-shadow:var(--shadow);margin-bottom:12px;overflow:hidden}
.accordion-button{font-size:16px;font-weight:600;color:var(--ink);background:#fff;padding:18px 20px;box-shadow:none!important}
.accordion-button:not(.collapsed){background:var(--brand-50);color:var(--brand-700)}
.accordion-button:focus{border-color:transparent;box-shadow:0 0 0 3px rgba(47,111,178,.18)!important}
.accordion-button::after{width:14px;height:14px;background-size:14px}
.accordion-body{padding:0 20px 20px;font-size:14.8px;color:#3B4F63;line-height:1.8}
/* ============ subscribe ============ */
.subscribe-card{background:linear-gradient(135deg,var(--brand-700),var(--brand-600) 62%,#3D7FBE);border-radius:var(--radius-lg);padding:42px;display:grid;grid-template-columns:1fr 1fr;gap:36px;color:#fff;box-shadow:0 18px 40px rgba(36,90,147,.24);position:relative;overflow:hidden}
.subscribe-card::before{content:"";position:absolute;right:-60px;top:-60px;width:260px;height:260px;border-radius:50%;background:rgba(255,255,255,.08)}
.subscribe-copy{position:relative;z-index:1}
.subscribe-copy h2{font-size:clamp(22px,2.5vw,30px);color:#fff;margin-bottom:12px}
.subscribe-copy p{color:rgba(255,255,255,.86);font-size:15px}
.subscribe-points{display:grid;gap:9px;margin-top:20px}
.subscribe-points li{display:flex;align-items:center;gap:9px;font-size:14px;color:rgba(255,255,255,.92)}
.subscribe-points i{color:#BFE0FF;font-size:12px}
.sub-form{position:relative;z-index:1;background:#fff;border-radius:var(--radius);padding:24px;color:var(--ink);box-shadow:0 12px 30px rgba(12,35,60,.18)}
.sub-form h3{font-size:17px;margin-bottom:14px}
.field{margin-bottom:13px}
.field label{display:block;font-size:13px;font-weight:600;color:#3B4F63;margin-bottom:6px}
.form-control,.form-select{width:100%;min-height:44px;border:1px solid var(--line);border-radius:var(--radius-sm);padding:10px 13px;font-size:14.5px;background:#FCFDFF;color:var(--ink);transition:border-color .2s ease,box-shadow .2s ease}
.form-control::placeholder{color:#94A5B6}
.form-control:focus,.form-select:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(74,135,198,.18);background:#fff}
.form-tip{font-size:12px;color:var(--muted);margin-top:10px}
/* ============ footer ============ */
.site-footer{background:#122437;color:#C4D4E3;padding:58px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;padding-bottom:38px}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:14px}
.footer-brand .brand-mark{width:38px;height:38px;border-radius:11px;background:linear-gradient(150deg,var(--brand-500),var(--brand-600));display:grid;place-items:center;color:#fff;font-size:16px;box-shadow:none}
.footer-brand strong{color:#fff;font-size:15.5px}
.f-desc{font-size:13.8px;color:#9DB2C6;line-height:1.8;max-width:340px}
.footer-col h4{color:#fff;font-size:14px;margin-bottom:14px;font-weight:600}
.footer-col li{margin-bottom:9px}
.footer-col a{font-size:13.8px;color:#A9BDD0}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.10);padding:18px 0 22px;display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;font-size:12.8px;color:#8FA5B9}
.back-top{display:inline-flex;align-items:center;gap:7px;color:#C4D4E3;font-size:12.8px}
.back-top:hover{color:#fff}
/* ============ responsive ============ */
@media (max-width:1199px){
  .head-grid{grid-template-columns:1.4fr .6fr;gap:26px}
  .mega-menu{width:760px}
}
@media (max-width:991px){
  .nav-links{display:none}
  .nav-toggle{display:inline-flex}
  .nav-tools .login-link,.nav-tools .icon-btn{display:none}
  .nav-tools .btn{display:none}
  .nav-inner{min-height:68px}
  .head-grid{grid-template-columns:1fr}
  .quick-index{position:static}
  .map-grid{grid-template-columns:1fr}
  .steps,.reviews,.channel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .step-card::after{display:none}
  .faq-grid{grid-template-columns:1fr;gap:24px}
  .subscribe-card{grid-template-columns:1fr;padding:32px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .section{padding:56px 0}
}
@media (max-width:767px){
  .page-head{padding:28px 0 44px}
  .section{padding:44px 0}
  .tl-item{grid-template-columns:66px minmax(0,1fr);gap:14px;align-items:start}
  .tl-side{grid-column:1/-1;flex-direction:row;align-items:center;justify-content:space-between;width:100%;text-align:left}
  .steps,.reviews,.channel-grid{grid-template-columns:1fr}
  .subscribe-card{padding:26px 20px}
  .sub-form{padding:20px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .btn{width:100%}
  .nav-tools .btn{width:auto}
}
@media (max-width:520px){
  .container,.wrap{padding:0 16px}
  .page-head h1{font-size:25px}
  .head-lead{font-size:15px}
  .tl-date .d{font-size:20px}
  .tl-body h3{font-size:16.5px}
  .quick-index{padding:18px}
  .city-tags span{font-size:12.5px}
}

/* roulang page: category2 */
:root{
  --brand-700:#245A93;--brand-600:#2F6FB2;--brand-500:#4A87C6;--brand-50:#EEF5FC;
  --accent-600:#D9633C;--accent-50:#FDF0E9;
  --ink:#172533;--muted:#5B6B7C;--line:#DDE6F0;--bg:#F5F8FC;--surface:#FFFFFF;
  --success:#2E8B6E;--radius-sm:10px;--radius:16px;--radius-lg:20px;
  --shadow:0 8px 24px rgba(23,37,51,.06);--shadow-hover:0 14px 36px rgba(23,37,51,.10);
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);font-size:16px;line-height:1.75;color:var(--ink);background:var(--bg)}
h1,h2,h3,h4,h5{margin:0;font-weight:700;line-height:1.35;color:var(--ink)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,border-color .2s ease}
a:hover{color:var(--brand-700)}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid rgba(47,111,178,.35);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}

/* ============ header ============ */
.site-header{position:sticky;top:0;z-index:1030;background:rgba(255,255,255,.96);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid transparent;transition:box-shadow .25s ease,border-color .25s ease}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:0 6px 18px rgba(23,37,51,.06)}
.nav-inner{display:flex;align-items:center;gap:18px;min-height:74px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{width:42px;height:42px;border-radius:13px;background:linear-gradient(150deg,var(--brand-600),var(--brand-500));display:grid;place-items:center;color:#fff;font-size:18px;box-shadow:0 6px 16px rgba(47,111,178,.28)}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:17px;font-weight:700;color:var(--ink)}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted)}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:14px}
.nav-links>li{position:relative}
.nav-links>li>a{display:inline-flex;align-items:center;gap:6px;padding:9px 14px;border-radius:10px;font-size:15px;font-weight:500;color:#2b3b4b}
.nav-links>li>a:hover,.nav-links>li>a:focus{background:var(--brand-50);color:var(--brand-700)}
.nav-links>li>a.active{color:var(--brand-700);background:var(--brand-50);font-weight:600}
.nav-tools{margin-left:auto;display:flex;align-items:center;gap:10px}
.icon-btn{width:40px;height:40px;border-radius:11px;border:1px solid var(--line);background:#fff;display:grid;place-items:center;color:var(--muted);transition:all .2s ease}
.icon-btn:hover{border-color:var(--brand-500);color:var(--brand-700);background:var(--brand-50)}
.nav-login{font-size:15px;font-weight:500;color:#2b3b4b;padding:8px 10px;border-radius:9px}
.nav-login:hover{background:var(--brand-50);color:var(--brand-700)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:11px 22px;border-radius:var(--radius-sm);font-size:15px;font-weight:600;border:1px solid transparent;transition:transform .18s ease,background .18s ease,box-shadow .18s ease,color .18s ease,border-color .18s ease}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 6px 16px rgba(47,111,178,.22)}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(47,111,178,.28)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--brand-700);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand-500);background:var(--brand-50);color:var(--brand-700)}
.btn-accent{background:var(--accent-600);color:#fff}
.btn-accent:hover{background:#c2542f;color:#fff;transform:translateY(-1px)}
.btn-sm{min-height:38px;padding:8px 16px;font-size:14px}
.text-link{display:inline-flex;align-items:center;gap:7px;color:var(--brand-700);font-weight:600;font-size:15px;border-bottom:1px solid transparent;padding-bottom:2px}
.text-link:hover{color:var(--brand-700);border-bottom-color:var(--brand-500)}
.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:#fff;color:var(--ink);align-items:center;justify-content:center;font-size:18px}
/* mega menu */
.mega-menu{position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%);width:840px;max-width:calc(100vw - 40px);background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-hover);padding:24px;display:none;z-index:1050}
.mega-parent:hover>.mega-menu,.mega-parent:focus-within>.mega-menu{display:block}
.mega-grid{display:grid;grid-template-columns:1.1fr 1.1fr .9fr;gap:24px}
.mega-col h4{font-size:13px;font-weight:600;color:var(--muted);margin-bottom:10px}
.mega-col a.mega-link{display:block;padding:9px 12px;border-radius:10px;font-size:15px;color:#2b3b4b}
.mega-col a.mega-link:hover{background:var(--brand-50);color:var(--brand-700)}
.mega-promo{background:var(--brand-50);border-radius:var(--radius);padding:18px}
.mega-promo h5{font-size:16px;font-weight:700;margin-bottom:8px}
.mega-promo p{font-size:13.5px;color:var(--muted);line-height:1.7;margin-bottom:12px}
.mega-promo .btn{width:100%}
/* mobile nav */
.mobile-panel{display:none;border-top:1px solid var(--line);background:#fff;max-height:calc(100vh - 74px);overflow-y:auto}
.mobile-panel.open{display:block}
.mobile-panel ul{padding:10px 0}
.mobile-panel li a{display:block;padding:12px 20px;font-size:15.5px;color:#2b3b4b}
.mobile-panel li a:hover{background:var(--brand-50);color:var(--brand-700)}
.mobile-panel .m-sub{padding-left:34px;font-size:14.5px;color:var(--muted)}
.mobile-cta{padding:14px 20px 22px;border-top:1px dashed var(--line)}

/* ============ shared bits ============ */
.section{padding:72px 0}
.section-white{background:var(--surface)}
.section-soft{background:var(--bg)}
.section-line-top{border-top:1px solid var(--line)}
.sec-tag{display:inline-flex;align-items:center;gap:7px;padding:5px 13px;border-radius:999px;background:var(--brand-50);color:var(--brand-700);font-size:13px;font-weight:600;margin-bottom:14px}
.badge-soft{display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:999px;background:var(--brand-50);color:var(--brand-700);font-size:12.5px;font-weight:600;white-space:nowrap}
.badge-accent{background:var(--accent-50);color:var(--accent-600)}
.sec-head{max-width:760px;margin-bottom:34px}
.sec-head h2{font-size:clamp(24px,3vw,32px);margin-bottom:12px}
.sec-head p{color:var(--muted);font-size:15.5px}

/* ============ category hero ============ */
.cat-hero{position:relative;padding:40px 0 56px;background:var(--brand-50);border-bottom:1px solid var(--line);overflow:hidden}
.cat-hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(105deg,rgba(255,255,255,.95) 0%,rgba(255,255,255,.86) 55%,rgba(255,255,255,.7) 100%),url('/assets/images/007abc8128cb8177.webp');background-size:cover;background-position:center;opacity:1;pointer-events:none}
.cat-hero .container{position:relative;z-index:1}
.crumb{display:flex;align-items:center;gap:9px;font-size:13.5px;color:var(--muted);margin-bottom:18px}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--brand-700)}
.crumb i{font-size:10px;opacity:.6}
.crumb span{color:var(--brand-700);font-weight:600}
.hero-grid{display:grid;grid-template-columns:1.55fr .95fr;gap:36px;align-items:start}
.cat-hero h1{font-size:clamp(28px,3.6vw,44px);line-height:1.28;letter-spacing:0}
.h1-brand{display:block;margin-top:14px;font-size:14px;font-weight:500;color:var(--brand-700);background:#fff;border:1px solid var(--line);border-radius:999px;padding:5px 14px;width:fit-content;max-width:100%;box-shadow:var(--shadow)}
.cat-lead{margin-top:18px;font-size:16.5px;color:#31465a;max-width:640px}
.head-stats{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.stat-pill{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 16px;font-size:13.5px;color:var(--muted);box-shadow:var(--shadow)}
.stat-pill b{font-size:17px;color:var(--brand-700);font-weight:700;font-variant-numeric:tabular-nums}
.overview-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-hover);padding:26px}
.overview-card h2{font-size:19px;margin:14px 0 16px}
.chip-list{display:flex;flex-wrap:wrap;gap:8px}
.chip-list span{padding:6px 13px;border-radius:999px;background:var(--brand-50);color:var(--brand-700);font-size:13px;font-weight:500}
.overview-note{margin-top:16px;padding-top:14px;border-top:1px dashed var(--line);font-size:13px;color:var(--muted);line-height:1.7}

/* ============ topic list ============ */
.list-layout{display:grid;grid-template-columns:1.6fr .9fr;gap:36px;align-items:start}
.section-head-compact{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:20px}
.section-head-compact h2{font-size:clamp(22px,2.4vw,28px)}
.head-note{font-size:13.5px;color:var(--muted)}
.filter-bar{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.filter-bar span{padding:7px 15px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--muted);font-size:13.5px;font-weight:500;transition:all .2s ease}
.filter-bar span.is-on{background:var(--brand-600);border-color:var(--brand-600);color:#fff;box-shadow:0 6px 14px rgba(47,111,178,.22)}
.filter-bar span:hover{border-color:var(--brand-500);color:var(--brand-700)}
.topic-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);overflow:hidden}
.topic-row{display:flex;gap:16px;padding:20px 22px;border-bottom:1px solid var(--line);transition:background .2s ease}
.topic-row:last-child{border-bottom:0}
.topic-row:hover{background:#F8FBFF}
.avatar{width:46px;height:46px;border-radius:14px;background:var(--brand-50);color:var(--brand-700);display:grid;place-items:center;font-weight:700;font-size:16px;flex:none}
.avatar.alt{background:var(--accent-50);color:var(--accent-600)}
.topic-main{min-width:0}
.topic-main h3{font-size:17px;font-weight:600;margin-bottom:6px;line-height:1.5}
.topic-main p{font-size:14.5px;color:var(--muted);line-height:1.7;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.topic-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:12.5px;color:var(--muted)}
.topic-meta i{font-size:12px;margin-right:4px;opacity:.75}
.list-more{margin-top:22px;text-align:center}
.side-col{position:sticky;top:96px;align-self:start;display:grid;gap:20px}
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:24px}
.side-card h3{font-size:17px;margin-bottom:16px}
.hot-list li{display:flex;gap:12px;padding:11px 0;border-bottom:1px dashed var(--line)}
.hot-list li:last-child{border-bottom:0;padding-bottom:0}
.hot-list .rank{width:22px;height:22px;border-radius:7px;background:var(--brand-50);color:var(--brand-700);font-size:12px;font-weight:700;display:grid;place-items:center;flex:none;margin-top:3px;font-variant-numeric:tabular-nums}
.hot-list p{font-size:14.5px;line-height:1.6;color:#2b3b4b;margin-bottom:4px}
.hot-list em{font-style:normal;font-size:12.5px;color:var(--muted)}
.side-note{background:linear-gradient(160deg,#fff 0%,var(--brand-50) 100%)}
.side-note p{font-size:14px;color:var(--muted);line-height:1.75;margin-bottom:14px}

/* ============ qa ============ */
.qa-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.qa-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:26px 24px 24px;display:flex;flex-direction:column;transition:transform .2s ease,box-shadow .2s ease}
.qa-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.qa-num{display:inline-flex;align-items:center;justify-content:center;min-width:34px;height:26px;border-radius:8px;background:var(--brand-50);color:var(--brand-700);font-size:12.5px;font-weight:700;margin-bottom:14px;font-variant-numeric:tabular-nums}
.qa-card h3{font-size:17.5px;line-height:1.55;margin-bottom:10px}
.qa-card p{font-size:14.5px;color:var(--muted);line-height:1.75;margin-bottom:16px;flex:1}

/* ============ rules ============ */
.rules-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.rule-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:transform .2s ease,box-shadow .2s ease}
.rule-item:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.rule-icon{width:42px;height:42px;border-radius:12px;background:var(--brand-50);color:var(--brand-700);display:grid;place-items:center;font-size:17px;margin-bottom:14px}
.rule-item h3{font-size:16px;margin-bottom:6px}
.rule-item p{font-size:13.5px;color:var(--muted);line-height:1.7}

/* ============ feature topics ============ */
.feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.feature-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);overflow:hidden;transition:transform .2s ease,box-shadow .2s ease}
.feature-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.feature-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--brand-50)}
.feature-thumb img{width:100%;height:100%;object-fit:cover}
.feature-body{padding:24px}
.feature-body h3{font-size:19px;margin-bottom:10px}
.feature-body p{font-size:14.5px;color:var(--muted);line-height:1.75;margin-bottom:14px}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.tag-row span{padding:4px 11px;border-radius:999px;background:#EEF1F5;color:var(--muted);font-size:12.5px;transition:all .2s ease}
.feature-card:hover .tag-row span{background:var(--brand-50);color:var(--brand-700)}

/* ============ channel ============ */
.channel-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.channel-card{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:28px;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.channel-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--brand-500);color:var(--ink)}
.channel-icon{width:46px;height:46px;border-radius:13px;background:var(--brand-50);color:var(--brand-700);display:grid;place-items:center;font-size:19px;margin-bottom:16px}
.channel-card h3{font-size:19px;margin-bottom:8px}
.channel-card p{font-size:14.5px;color:var(--muted);line-height:1.75;margin-bottom:18px}
.channel-more{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--brand-700)}

/* ============ cta band ============ */
.cta-band{background:linear-gradient(120deg,var(--brand-700) 0%,var(--brand-600) 62%,var(--brand-500) 100%);padding:56px 0}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px}
.cta-inner h2{color:#fff;font-size:clamp(22px,2.8vw,30px);margin-bottom:10px}
.cta-inner p{color:rgba(255,255,255,.86);font-size:15px;max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.cta-band .btn-ghost{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.4);color:#fff}
.cta-band .btn-ghost:hover{background:#fff;color:var(--brand-700);border-color:#fff}

/* ============ footer ============ */
.site-footer{background:#132234;color:#B9C7D6;padding:60px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand strong{font-size:16px;color:#fff}
.footer-brand .brand-mark{width:36px;height:36px;border-radius:11px;font-size:15px;box-shadow:none}
.f-desc{font-size:14px;line-height:1.85;color:#93A5B7;max-width:340px}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:14px;font-weight:600}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:#A7B6C6}
.footer-col a:hover{color:#fff}
.footer-bottom{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;margin-top:38px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:#8A9BAC}
.back-top{color:#C7D5E3;font-size:13px;display:inline-flex;align-items:center;gap:6px}
.back-top:hover{color:#fff}

/* ============ responsive ============ */
@media (max-width:1199.98px){
  .hero-grid{grid-template-columns:1.4fr 1fr;gap:28px}
  .qa-grid{grid-template-columns:repeat(2,1fr)}
  .rules-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
  .footer-grid>div:last-child{grid-column:1/-1}
}
@media (max-width:991.98px){
  .nav-links,.nav-tools{display:none}
  .nav-toggle{display:inline-flex;margin-left:auto}
  .nav-inner{min-height:66px}
  .section{padding:48px 0}
  .cat-hero{padding:30px 0 44px}
  .hero-grid{grid-template-columns:1fr;gap:24px}
  .list-layout{grid-template-columns:1fr;gap:26px}
  .side-col{position:static}
  .feature-grid{grid-template-columns:1fr}
  .channel-grid{grid-template-columns:1fr}
}
@media (max-width:767.98px){
  body{font-size:15.5px}
  .section{padding:44px 0}
  .cat-lead{font-size:15.5px}
  .qa-grid{grid-template-columns:1fr}
  .rules-grid{grid-template-columns:1fr}
  .topic-row{padding:16px 16px}
  .avatar{width:40px;height:40px;border-radius:12px;font-size:14px}
  .topic-main h3{font-size:16px}
  .overview-card{padding:20px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1;min-width:150px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
  .footer-grid>div:first-child{grid-column:1/-1}
  .footer-grid>div:last-child{grid-column:auto}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px}
  .h1-brand{font-size:13px;padding:5px 12px}
}
@media (max-width:519.98px){
  .head-stats .stat-pill{width:100%;justify-content:space-between}
  .footer-grid{grid-template-columns:1fr}
}