/* roulang page: index */
:root{
  --bg-0:#070B14;
  --bg-1:#0B1220;
  --bg-2:#101A2E;
  --surface:rgba(255,255,255,.055);
  --surface-2:rgba(255,255,255,.09);
  --line:rgba(138,170,255,.16);
  --line-strong:rgba(138,170,255,.30);
  --primary:#2F6BFF;
  --primary-glow:rgba(47,107,255,.45);
  --accent:#35E0C8;
  --warn:#FFB86B;
  --text-0:#E9EEF9;
  --text-1:#A6B4CE;
  --text-2:#6E7E9C;
  --r-s:10px;
  --r-m:14px;
  --r-l:20px;
  --r-xl:28px;
  --shadow:0 10px 30px rgba(3,8,20,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--text-0);
  background:var(--bg-0);
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block;border-style:none}
a{color:var(--text-0);text-decoration:none;transition:color .16s var(--ease),border-color .16s var(--ease)}
a:hover{color:var(--accent)}
button{font-family:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
::selection{background:rgba(47,107,255,.4);color:#fff}

.container{width:100%;max-width:1220px;margin:0 auto;padding:0 24px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:120;background:#fff;box-shadow:0 6px 20px rgba(10,20,40,.06)}
.site-header::before{content:"";display:block;height:3px;background:linear-gradient(90deg,var(--primary),var(--accent))}
.header-inner{display:flex;align-items:center;gap:24px;height:68px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{width:40px;height:40px;border-radius:12px;background:#0B1220;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 16px rgba(11,18,32,.28)}
.logo-mark svg{width:22px;height:22px;stroke:var(--accent);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.logo-text{font-size:18px;font-weight:600;color:#0B1220;letter-spacing:.01em;white-space:nowrap}
.logo:hover .logo-text{color:var(--primary)}
.nav-main{display:flex;align-items:center;gap:6px;margin-left:8px}
.nav-link{position:relative;display:inline-block;padding:8px 12px;font-size:15px;color:#3A475F;border-radius:8px;transition:color .16s var(--ease)}
.nav-link::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;background:var(--primary);border-radius:2px;transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease)}
.nav-link:hover{color:var(--primary)}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}
.nav-link.active{color:var(--primary);font-weight:600}
.header-right{display:flex;align-items:center;gap:12px;margin-left:auto}
.search-box{display:flex;align-items:center;gap:8px;height:40px;padding:0 14px;background:#F4F6FB;border:1px solid #E7ECF5;border-radius:var(--r-m);transition:border-color .16s var(--ease),box-shadow .16s var(--ease)}
.search-box:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(47,107,255,.14);background:#fff}
.search-box svg{width:16px;height:16px;stroke:#7C8AA5;fill:none;stroke-width:2;stroke-linecap:round;flex-shrink:0}
.search-box input{width:172px;border:0;background:transparent;outline:none;font-size:13.5px;color:#0B1220;font-family:inherit}
.search-box input::placeholder{color:#93A0B8}
.menu-toggle{display:none;width:42px;height:42px;border:1px solid #E7ECF5;background:#F4F6FB;border-radius:12px;align-items:center;justify-content:center;cursor:pointer}
.menu-toggle span{display:block;width:18px;height:2px;background:#2B3A55;border-radius:2px;position:relative;transition:background .2s var(--ease)}
.menu-toggle span::before,.menu-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:#2B3A55;border-radius:2px;transition:transform .2s var(--ease)}
.menu-toggle span::before{top:-6px}
.menu-toggle span::after{top:6px}
.menu-toggle.active span{background:transparent}
.menu-toggle.active span::before{transform:translateY(6px) rotate(45deg)}
.menu-toggle.active span::after{transform:translateY(-6px) rotate(-45deg)}
.mobile-drawer{position:fixed;top:0;right:0;width:min(320px,86vw);height:100vh;background:#fff;transform:translateX(102%);transition:transform .28s var(--ease);z-index:130;padding:86px 22px 28px;box-shadow:-20px 0 50px rgba(10,20,40,.18);display:flex;flex-direction:column;gap:4px;overflow-y:auto}
.mobile-drawer.open{transform:translateX(0)}
.mobile-drawer a.drawer-link{display:block;font-size:17px;color:#22304A;padding:13px 4px;border-bottom:1px solid #EEF2F8}
.mobile-drawer a.drawer-link:hover{color:var(--primary)}
.mobile-drawer .btn{margin-top:18px;justify-content:center}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:var(--r-m);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform .18s var(--ease),box-shadow .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);white-space:nowrap}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 0 0 1px rgba(47,107,255,.55),0 10px 30px var(--primary-glow)}
.btn-primary:hover{background:#3E78FF;color:#fff;transform:translateY(-2px);box-shadow:0 0 0 1px rgba(47,107,255,.7),0 16px 40px var(--primary-glow)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text-0)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:12px}
.btn-block{width:100%}
.arrow-link{display:inline-flex;align-items:center;gap:6px;color:var(--accent);font-size:14px;font-weight:600}
.arrow-link svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .18s var(--ease)}
.arrow-link:hover svg{transform:translateX(4px)}

/* ---------- section base ---------- */
.section{padding:96px 0;position:relative}
.section--alt{background:var(--bg-1)}
.section--line{border-top:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:44px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:600;letter-spacing:.14em;color:var(--accent);text-transform:uppercase;margin-bottom:14px}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--accent);display:inline-block}
.section-title{font-size:clamp(24px,2.6vw,34px);line-height:1.3;font-weight:700;letter-spacing:-.01em}
.section-desc{margin-top:14px;color:var(--text-1);font-size:15.5px;line-height:1.85;max-width:720px}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:88px 0 76px;background:var(--bg-0);border-bottom:1px solid var(--line)}
.hero::before{content:"";position:absolute;inset:0;background:
  linear-gradient(rgba(138,170,255,.05) 1px,transparent 1px) 0 0/100% 44px,
  linear-gradient(90deg,rgba(138,170,255,.05) 1px,transparent 1px) 0 0/44px 100%;
  opacity:.5;pointer-events:none}
.hero::after{content:"";position:absolute;right:-8%;top:-14%;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(53,224,200,.28),transparent 68%);filter:blur(80px);pointer-events:none}
.hero-bg{position:absolute;inset:0;background-image:url(/assets/images/048ea367e67b57fd.webp);background-size:cover;background-position:center;opacity:.22;pointer-events:none}
.hero-inner{position:relative;z-index:2}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;border:1px solid var(--line-strong);background:var(--surface);font-size:13px;color:var(--text-1);backdrop-filter:blur(14px)}
.hero-badge i{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent);display:inline-block}
h1.hero-title{margin-top:22px;font-size:clamp(30px,4.2vw,52px);line-height:1.2;font-weight:700;letter-spacing:-.01em;max-width:900px}
h1.hero-title em{font-style:normal;color:var(--accent)}
.hero-sub{margin-top:16px;font-size:clamp(16px,1.6vw,19px);color:var(--text-0);max-width:720px}
.hero-lead{margin-top:16px;max-width:720px;color:var(--text-1);font-size:16px;line-height:1.9}
.hero-actions{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap}
.metrics-bar{margin-top:44px;display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r-l);overflow:hidden;backdrop-filter:blur(14px) saturate(140%)}
.metric{background:rgba(11,18,32,.72);padding:22px 20px}
.metric-value{font-size:clamp(22px,2.4vw,30px);font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums;line-height:1.2}
.metric-label{margin-top:6px;font-size:13px;color:var(--text-1)}

/* ---------- grids & cards ---------- */
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);padding:24px;box-shadow:var(--shadow);backdrop-filter:blur(14px) saturate(140%);transition:transform .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);position:relative}
.card:hover{transform:translateY(-4px);border-color:var(--accent);background:var(--surface-2)}
.card h3{font-size:18px;line-height:1.45;font-weight:600}
.card p{margin-top:10px;font-size:14.5px;color:var(--text-1);line-height:1.8}
.icon-box{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:rgba(53,224,200,.1);border:1px solid rgba(53,224,200,.24);margin-bottom:16px}
.icon-box svg{width:22px;height:22px;stroke:var(--accent);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.channel-card .card-foot{display:flex;justify-content:flex-end;margin-top:16px}
.channel-card .card-foot svg{width:16px;height:16px;stroke:var(--text-2);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .18s var(--ease),stroke .18s var(--ease)}
.channel-card:hover .card-foot svg{transform:translateX(4px);stroke:var(--accent)}

.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;font-size:12px;font-weight:500;line-height:1}
.badge-cat{background:rgba(53,224,200,.12);color:var(--accent)}
.badge-time{background:rgba(255,184,107,.12);color:var(--warn)}
.badge-warn{background:rgba(255,184,107,.14);color:var(--warn);border:1px solid rgba(255,184,107,.3)}

/* ---------- spec table ---------- */
.spec-table{width:100%;border-collapse:separate;border-spacing:0;border:1px solid var(--line);border-radius:var(--r-l);overflow:hidden;background:rgba(255,255,255,.03);font-size:14.5px}
.spec-table thead th{background:rgba(47,107,255,.1);color:var(--text-0);font-weight:600;font-size:13.5px;text-align:left;padding:15px 20px;border-bottom:1px solid var(--line);white-space:nowrap}
.spec-table tbody td{padding:15px 20px;color:var(--text-1);border-bottom:1px solid rgba(138,170,255,.1)}
.spec-table tbody tr:last-child td{border-bottom:0}
.spec-table tbody tr:nth-child(even){background:rgba(255,255,255,.025)}
.spec-table tbody tr:hover{background:rgba(53,224,200,.06)}
.spec-table td:first-child{color:var(--text-0);font-weight:600}
.spec-table .num{font-variant-numeric:tabular-nums;color:var(--accent)}
.table-note{margin-top:14px;font-size:12.5px;color:var(--text-2)}

/* ---------- timeline ---------- */
.steps{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:12px}
.steps::before{content:"";position:absolute;left:6%;right:6%;top:26px;border-top:1px dashed rgba(53,224,200,.35)}
.step{position:relative;padding-top:0}
.step-no{width:52px;height:52px;border-radius:50%;border:1px solid var(--line-strong);background:rgba(11,18,32,.9);display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums;box-shadow:0 0 0 4px rgba(53,224,200,.06),inset 0 0 16px rgba(53,224,200,.2);position:relative;z-index:1}
.step h3{margin-top:18px;font-size:17px;font-weight:600}
.step p{margin-top:8px;font-size:14px;color:var(--text-1);line-height:1.8}

/* ---------- case cards ---------- */
.case-card{display:flex;flex-direction:column;padding:0;overflow:hidden}
.case-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--surface-2)}
.case-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.case-card:hover .case-thumb img{transform:scale(1.05)}
.case-thumb .badge{position:absolute;left:14px;top:14px;backdrop-filter:blur(8px)}
.case-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.case-body h3{font-size:17px;line-height:1.5;font-weight:600}
.case-body p{font-size:14px;color:var(--text-1);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.case-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:8px}

/* ---------- stat strip ---------- */
.stat-strip{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:var(--r-l);background:var(--surface);backdrop-filter:blur(14px) saturate(140%);box-shadow:var(--shadow);overflow:hidden;position:relative}
.stat-strip .strip-tag{position:absolute;right:18px;top:16px}
.stat{padding:30px 24px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat-value{font-size:clamp(26px,3vw,34px);font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums;line-height:1.15}
.stat-label{margin-top:8px;font-size:13px;color:var(--text-1)}

/* ---------- topics ---------- */
.topic-layout{display:grid;grid-template-columns:5fr 7fr;gap:24px}
.topic-main{padding:0;overflow:hidden;display:flex;flex-direction:column}
.topic-main .topic-thumb{aspect-ratio:4/3;overflow:hidden;background:var(--surface-2)}
.topic-main .topic-thumb img{width:100%;height:100%;object-fit:cover}
.topic-main .topic-body{padding:24px}
.topic-main h3{font-size:20px}
.topic-list{display:flex;flex-direction:column;gap:10px}
.topic-item{display:flex;align-items:center;gap:16px;padding:18px 20px;border:1px solid var(--line);border-radius:var(--r-m);background:rgba(255,255,255,.03);transition:background-color .16s var(--ease),border-color .16s var(--ease),padding-left .16s var(--ease)}
.topic-item:hover{background:rgba(255,255,255,.07);border-color:var(--line-strong);padding-left:24px;color:var(--text-0)}
.topic-item .no{font-size:15px;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums;width:26px;flex-shrink:0}
.topic-item .t-title{font-size:16px;font-weight:600;color:var(--text-0);flex:1}
.topic-item .t-count{font-size:13px;color:var(--text-2);white-space:nowrap}
.topic-item svg{width:14px;height:14px;stroke:var(--text-2);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}

/* ---------- news ---------- */
.news-card{display:flex;flex-direction:column;gap:12px;min-height:212px}
.news-title{font-size:17px;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.news-desc{font-size:14px;color:var(--text-1);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin:0}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto;padding-top:6px}
.news-grid .badge-cat{align-self:flex-start}
.empty-state{border:1px dashed var(--line-strong);border-radius:var(--r-l);padding:56px 24px;text-align:center;background:rgba(255,255,255,.02)}
.empty-state svg{width:44px;height:44px;stroke:var(--text-2);fill:none;stroke-width:1.4;stroke-linecap:round;stroke-linejoin:round;margin:0 auto 16px}
.empty-state p{color:var(--text-1);font-size:15px;margin-bottom:20px}

/* ---------- tags ---------- */
.tag-cloud{display:flex;flex-wrap:wrap;gap:12px;max-width:900px}
.tag{display:inline-flex;align-items:center;padding:9px 18px;border-radius:999px;background:var(--surface);border:1px solid var(--line);font-size:14px;color:var(--text-1);transition:all .16s var(--ease)}
.tag:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}

/* ---------- guarantee ---------- */
.guarantee{position:relative;border:1px solid var(--line);border-radius:var(--r-l);background:var(--bg-2);padding:36px 28px;overflow:hidden;box-shadow:var(--shadow)}
.guarantee::before{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:linear-gradient(90deg,var(--accent),rgba(47,107,255,.6),transparent)}
.guarantee-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.g-item h3{font-size:16px;font-weight:600;margin-top:14px}
.g-item p{font-size:13.5px;color:var(--text-1);margin-top:6px;line-height:1.8}
.g-item .icon-box{margin-bottom:0}

/* ---------- rank ---------- */
.rank-layout{display:grid;grid-template-columns:5fr 7fr;gap:24px;align-items:start}
.rank-list{display:flex;flex-direction:column;gap:8px}
.rank-list a{display:flex;align-items:center;gap:14px;padding:15px 18px;border:1px solid var(--line);border-radius:var(--r-m);background:rgba(255,255,255,.03);transition:all .16s var(--ease)}
.rank-list a:hover{background:rgba(255,255,255,.07);border-color:var(--line-strong);color:var(--text-0)}
.rank-no{width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:var(--text-1);border:1px solid var(--line-strong);font-variant-numeric:tabular-nums;flex-shrink:0}
.rank-no.top{background:var(--accent);border-color:var(--accent);color:#062A26}
.rank-list .r-title{font-size:15px;color:var(--text-0);line-height:1.5;flex:1}
.pick-card{padding:0;overflow:hidden}
.pick-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--surface-2)}
.pick-thumb img{width:100%;height:100%;object-fit:cover}
.pick-body{padding:24px}
.pick-body h3{font-size:20px;margin-top:12px}
.pick-body p{margin-top:10px;font-size:14.5px;color:var(--text-1);line-height:1.85}
.pick-foot{display:flex;align-items:center;justify-content:space-between;margin-top:18px;gap:12px}

/* ---------- download ---------- */
.dl-layout{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.dl-list{display:flex;flex-direction:column;gap:14px}
.res-row{display:flex;align-items:center;gap:16px;padding:18px 20px;border:1px solid var(--line);border-radius:var(--r-m);background:rgba(255,255,255,.04)}
.res-row .icon-box{width:40px;height:40px;border-radius:10px;margin:0;flex-shrink:0}
.res-row .icon-box svg{width:18px;height:18px}
.res-info{flex:1;min-width:0}
.res-info h3{font-size:15px;font-weight:600}
.res-info span{font-size:12.5px;color:var(--text-2)}
.res-row .btn{flex-shrink:0}
.dl-points{display:flex;flex-direction:column;gap:12px;margin-top:20px}
.dl-points li{display:flex;gap:10px;font-size:14.5px;color:var(--text-1)}
.dl-points li svg{width:16px;height:16px;stroke:var(--accent);fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;margin-top:6px}

/* ---------- forms ---------- */
.form-card{border:1px solid var(--line);border-radius:var(--r-l);background:var(--surface);padding:26px;backdrop-filter:blur(14px) saturate(140%);box-shadow:var(--shadow)}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;color:var(--text-1);margin-bottom:7px}
.input,.select{width:100%;height:46px;padding:0 14px;border-radius:var(--r-s);border:1px solid var(--line);background:rgba(255,255,255,.06);color:var(--text-0);font-size:14.5px;font-family:inherit;outline:none;transition:border-color .16s var(--ease),box-shadow .16s var(--ease),background-color .16s var(--ease)}
.input::placeholder{color:var(--text-2)}
.input:focus,.select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(53,224,200,.18);background:rgba(255,255,255,.09)}
.select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,#7E8FAD 50%),linear-gradient(135deg,#7E8FAD 50%,transparent 50%);background-position:calc(100% - 18px) 20px,calc(100% - 13px) 20px;background-size:5px 5px,5px 5px;background-repeat:no-repeat}
.select option{background:#0B1220;color:var(--text-0)}
textarea.input{height:88px;padding:12px 14px;resize:vertical;line-height:1.7}
.form-hint{font-size:12px;color:var(--text-2);margin-top:12px;line-height:1.7}
.alert{display:none;margin-top:14px;padding:10px 14px;border-radius:var(--r-s);font-size:13.5px;border:1px solid transparent}
.alert.show{display:block}
.alert.ok{background:rgba(53,224,200,.1);border-color:rgba(53,224,200,.35);color:var(--accent)}
.alert.warn{background:rgba(255,184,107,.1);border-color:rgba(255,184,107,.35);color:var(--warn)}
.subscribe-card{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding:26px;border:1px solid var(--line);border-radius:var(--r-xl);background:var(--surface);backdrop-filter:blur(14px) saturate(140%);box-shadow:var(--shadow)}
.subscribe-card .input{flex:1;min-width:220px}

/* ---------- faq ---------- */
.faq{max-width:900px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px 4px;background:none;border:0;text-align:left;font-size:17px;font-weight:600;color:var(--text-0);cursor:pointer;transition:color .16s var(--ease)}
.faq-q:hover{color:var(--accent)}
.faq-q .plus{width:20px;height:20px;position:relative;flex-shrink:0}
.faq-q .plus::before,.faq-q .plus::after{content:"";position:absolute;background:var(--accent);border-radius:2px;transition:transform .2s var(--ease)}
.faq-q .plus::before{left:0;top:9px;width:20px;height:2px}
.faq-q .plus::after{left:9px;top:0;width:2px;height:20px}
.faq-item.open .faq-q .plus::after{transform:rotate(90deg)}
.faq-a{display:none;padding:0 20px 20px 4px;border-left:3px solid transparent}
.faq-item.open .faq-a{display:block;border-left-color:var(--accent);background:rgba(53,224,200,.04);border-radius:0 var(--r-s) var(--r-s) 0}
.faq-a p{font-size:15px;color:var(--text-1);line-height:1.8}

/* ---------- partners ---------- */
.partner-strip{display:grid;grid-template-columns:repeat(6,1fr);gap:16px;padding:24px;border:1px solid var(--line);border-radius:var(--r-l);background:var(--surface)}
.partner{height:64px;border:1px solid var(--line);border-radius:var(--r-s);display:flex;align-items:center;justify-content:center;font-size:13.5px;color:var(--text-2);background:rgba(255,255,255,.02);opacity:.8;transition:all .18s var(--ease);text-align:center;padding:6px}
.partner:hover{opacity:1;color:var(--text-0);border-color:var(--line-strong);background:rgba(255,255,255,.06)}

/* ---------- contact ---------- */
.contact-card{display:grid;grid-template-columns:1fr 1fr;gap:40px;padding:40px;border:1px solid var(--line);border-radius:var(--r-xl);background:linear-gradient(160deg,rgba(16,26,46,.9),rgba(7,11,20,.9));box-shadow:var(--shadow);position:relative;overflow:hidden}
.contact-card::after{content:"";position:absolute;left:-10%;bottom:-40%;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(47,107,255,.3),transparent 68%);filter:blur(70px);pointer-events:none}
.contact-copy{position:relative;z-index:1}
.contact-copy h2{font-size:clamp(24px,2.6vw,32px);line-height:1.3;font-weight:700}
.contact-copy p{margin-top:14px;color:var(--text-1);font-size:15.5px;line-height:1.85;max-width:420px}
.contact-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px}
.contact-form{position:relative;z-index:1}
.disclaimer{margin-top:16px;font-size:12px;color:var(--text-2);line-height:1.8}

/* ---------- footer ---------- */
.site-footer{background:#050810;border-top:1px solid var(--line);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:44px}
.footer-brand .logo-text{color:var(--text-0);font-size:17px}
.footer-brand .logo-mark{background:rgba(255,255,255,.07);border:1px solid var(--line)}
.footer-brand p{margin-top:16px;font-size:14px;color:var(--text-1);line-height:1.85;max-width:320px}
.footer-col h4{font-size:14px;font-weight:600;color:var(--text-0);margin-bottom:16px;letter-spacing:.02em}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{font-size:14px;color:var(--text-1)}
.footer-col a:hover{color:var(--accent)}
.footer-col p{font-size:13.5px;color:var(--text-1);line-height:1.9}
.footer-bottom{border-top:1px solid var(--line);padding:20px 0 26px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.5px;color:var(--text-2)}
.footer-bottom .fb-links{display:flex;gap:18px}
.footer-bottom a{color:var(--text-2)}
.footer-bottom a:hover{color:var(--accent)}

/* ---------- responsive ---------- */
@media (max-width:1280px){
  .container{max-width:1080px}
  .search-box input{width:130px}
}
@media (max-width:1024px){
  .section{padding:72px 0}
  .nav-main{gap:2px}
  .nav-link{padding:8px 9px;font-size:14px}
  .search-box{display:none}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .steps::before{display:none}
  .topic-layout,.rank-layout,.dl-layout,.contact-card{grid-template-columns:1fr}
  .stat-strip{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2n){border-right:0}
  .stat:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .partner-strip{grid-template-columns:repeat(3,1fr)}
  .guarantee-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .header-inner{height:60px;gap:12px}
  .nav-main{display:none}
  .menu-toggle{display:flex}
  .header-right .btn-sm{display:none}
  .hero{padding:64px 0 56px}
  .hero-lead{font-size:15px}
  .metrics-bar{grid-template-columns:repeat(2,1fr)}
  .section{padding:52px 0}
  .section-title{font-size:clamp(22px,5vw,26px)}
  .grid{gap:16px}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .card{padding:18px}
  .steps{grid-template-columns:1fr;gap:20px}
  .stat-strip{grid-template-columns:1fr}
  .stat{border-right:0;border-bottom:1px solid var(--line);padding:22px 20px}
  .stat:last-child{border-bottom:0}
  .guarantee-grid{grid-template-columns:1fr}
  .partner-strip{grid-template-columns:repeat(2,1fr)}
  .contact-card{padding:24px}
  .hero-actions .btn,.contact-actions .btn{flex:1;justify-content:center}
  .subscribe-card{padding:20px}
  .subscribe-card .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .spec-table{font-size:13.5px}
  .spec-table thead th,.spec-table tbody td{padding:12px 14px}
  .table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
  .table-wrap .spec-table{min-width:560px}
}
@media (max-width:560px){
  .case-body{padding:16px}
  .topic-main .topic-body{padding:18px}
  .pick-body{padding:18px}
  .search-box{display:none}
  .res-row{flex-wrap:wrap}
  .res-row .btn{width:100%;justify-content:center}
  .faq-q{font-size:15.5px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
}

/* roulang page: article */
:root{
  --bg-0:#070B14;
  --bg-1:#0B1220;
  --bg-2:#101A2E;
  --surface:rgba(255,255,255,.055);
  --surface-2:rgba(255,255,255,.09);
  --line:rgba(138,170,255,.16);
  --line-strong:rgba(138,170,255,.30);
  --primary:#2F6BFF;
  --primary-glow:rgba(47,107,255,.45);
  --accent:#35E0C8;
  --warn:#FFB86B;
  --text-0:#E9EEF9;
  --text-1:#A6B4CE;
  --text-2:#6E7E9C;
  --r-s:10px;
  --r-m:14px;
  --r-l:20px;
  --r-xl:28px;
  --shadow:0 10px 30px rgba(3,8,20,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--text-0);
  background:var(--bg-0);
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block;border-style:none}
a{color:var(--text-0);text-decoration:none;transition:color .16s var(--ease),border-color .16s var(--ease),background-color .16s var(--ease)}
a:hover{color:var(--accent)}
button{font-family:inherit}
h1,h2,h3,h4,p{margin:0}
ul{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:1220px;margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:120;background:#fff;box-shadow:0 6px 20px rgba(10,20,40,.06)}
.site-header::before{content:"";display:block;height:3px;background:linear-gradient(90deg,var(--primary),var(--accent))}
.header-inner{display:flex;align-items:center;gap:24px;height:68px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{width:40px;height:40px;border-radius:12px;background:#0B1220;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 16px rgba(11,18,32,.28)}
.logo-mark svg{width:22px;height:22px;stroke:var(--accent);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.logo-text{font-size:18px;font-weight:600;color:#0B1220;letter-spacing:.01em;white-space:nowrap}
.logo:hover .logo-text{color:var(--primary)}
.nav-main{display:flex;align-items:center;gap:6px;margin-left:8px}
.nav-link{position:relative;display:inline-block;padding:8px 12px;font-size:15px;color:#3A475F;border-radius:8px;transition:color .16s var(--ease)}
.nav-link::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;background:var(--primary);border-radius:2px;transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease)}
.nav-link:hover{color:var(--primary)}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}
.nav-link.active{color:var(--primary);font-weight:600}
.header-right{display:flex;align-items:center;gap:12px;margin-left:auto}
.search-box{display:flex;align-items:center;gap:8px;height:40px;padding:0 14px;background:#F4F6FB;border:1px solid #E7ECF5;border-radius:var(--r-m);transition:border-color .16s var(--ease),box-shadow .16s var(--ease),background-color .16s var(--ease)}
.search-box:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(47,107,255,.14);background:#fff}
.search-box svg{width:16px;height:16px;stroke:#7C8AA5;fill:none;stroke-width:2;stroke-linecap:round;flex-shrink:0}
.search-box input{width:172px;border:0;background:transparent;outline:none;font-size:13.5px;color:#0B1220;font-family:inherit}
.search-box input::placeholder{color:#93A0B8}
.menu-toggle{display:none;width:42px;height:42px;border:1px solid #E7ECF5;background:#F4F6FB;border-radius:12px;align-items:center;justify-content:center;cursor:pointer;padding:0}
.menu-toggle span{display:block;width:18px;height:2px;background:#2B3A55;border-radius:2px;position:relative;transition:background .2s var(--ease)}
.menu-toggle span::before,.menu-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:#2B3A55;border-radius:2px;transition:transform .2s var(--ease)}
.menu-toggle span::before{top:-6px}
.menu-toggle span::after{top:6px}
.menu-toggle.active span{background:transparent}
.menu-toggle.active span::before{transform:translateY(6px) rotate(45deg)}
.menu-toggle.active span::after{transform:translateY(-6px) rotate(-45deg)}
.mobile-drawer{position:fixed;top:0;right:0;width:min(320px,86vw);height:100vh;background:#fff;transform:translateX(102%);transition:transform .28s var(--ease);z-index:130;padding:86px 22px 28px;box-shadow:-20px 0 50px rgba(10,20,40,.18);display:flex;flex-direction:column;gap:4px;overflow-y:auto}
.mobile-drawer.open{transform:translateX(0)}
.mobile-drawer a.drawer-link{display:block;font-size:17px;color:#22304A;padding:13px 4px;border-bottom:1px solid #EEF2F8}
.mobile-drawer a.drawer-link:hover{color:var(--primary)}
.mobile-drawer .btn{margin-top:18px;justify-content:center}
.drawer-mask{position:fixed;inset:0;background:rgba(5,9,18,.55);opacity:0;visibility:hidden;transition:opacity .26s var(--ease),visibility .26s var(--ease);z-index:125;backdrop-filter:blur(2px)}
.drawer-mask.show{opacity:1;visibility:visible}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:var(--r-m);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform .18s var(--ease),box-shadow .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);white-space:nowrap}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 0 0 1px rgba(47,107,255,.55),0 10px 30px var(--primary-glow)}
.btn-primary:hover{background:#3E78FF;color:#fff;transform:translateY(-2px);box-shadow:0 0 0 1px rgba(47,107,255,.7),0 16px 40px var(--primary-glow)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text-0)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:12px}
.btn-block{width:100%}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.arrow-link{display:inline-flex;align-items:center;gap:6px;color:var(--accent);font-size:14px;font-weight:600}
.arrow-link svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .18s var(--ease)}
.arrow-link:hover svg{transform:translateX(4px)}

/* ---------- section ---------- */
.section{padding:96px 0;position:relative}
.section--alt{background:var(--bg-1)}
.section--line{border-top:1px solid var(--line)}
.section--tight{padding:64px 0}
.section-head{max-width:760px;margin-bottom:40px}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:600;letter-spacing:.14em;color:var(--accent)}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--accent);display:inline-block}
.section-title{font-size:clamp(24px,2.6vw,34px);line-height:1.3;font-weight:700;margin-top:14px;letter-spacing:-.01em}

/* ---------- meta strip ---------- */
.meta-strip{background:var(--bg-1);border-bottom:1px solid var(--line)}
.meta-inner{display:flex;flex-wrap:wrap;align-items:center;gap:12px;padding:11px 0;font-size:12px;color:var(--text-2);letter-spacing:.02em}
.meta-inner strong{color:var(--text-1);font-weight:600}
.meta-dot{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(53,224,200,.14);display:inline-block}
.meta-sep{width:1px;height:12px;background:var(--line-strong);display:inline-block}

/* ---------- breadcrumb ---------- */
.crumb-wrap{padding:34px 0 0}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-2)}
.breadcrumb a{color:var(--text-1)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{color:var(--text-2);opacity:.6}
.breadcrumb .current{color:var(--text-2);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.channel-bar{display:flex;align-items:center;gap:10px;margin-top:16px}

/* ---------- article head ---------- */
.article-head{padding:22px 0 0;position:relative}
.article-head::after{content:"";position:absolute;left:50%;top:-140px;transform:translateX(-50%);width:640px;height:320px;background:radial-gradient(closest-side,rgba(53,224,200,.14),transparent 72%);filter:blur(30px);pointer-events:none;z-index:-1}
.article-title{font-size:clamp(28px,4.1vw,46px);line-height:1.24;font-weight:700;letter-spacing:-.01em;max-width:900px;margin:14px 0 0}
.article-sub{max-width:760px;margin-top:16px;font-size:16px;color:var(--text-1);line-height:1.85}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:24px;padding-bottom:26px;border-bottom:1px solid var(--line)}
.author-mini{display:flex;align-items:center;gap:10px}
.avatar{width:38px;height:38px;border-radius:12px;background:linear-gradient(140deg,rgba(47,107,255,.35),rgba(53,224,200,.22));border:1px solid var(--line-strong);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;color:var(--text-0);flex-shrink:0}
.author-mini .a-name{font-size:14px;font-weight:600;color:var(--text-0);line-height:1.3}
.author-mini .a-role{font-size:12px;color:var(--text-2);line-height:1.4}
.meta-facts{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--text-2)}
.badge{display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:999px;font-size:12px;font-weight:600;line-height:1;white-space:nowrap}
.badge-cyan{background:rgba(53,224,200,.12);color:var(--accent);border:1px solid rgba(53,224,200,.24)}
.badge-warn{background:rgba(255,184,107,.12);color:var(--warn);border:1px solid rgba(255,184,107,.24)}
.share-group{display:flex;align-items:center;gap:10px;margin-left:auto}
.share-label{font-size:12px;color:var(--text-2);letter-spacing:.08em}
.share-btn{width:38px;height:38px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;background:var(--surface);border:1px solid var(--line);cursor:pointer;transition:border-color .16s var(--ease),transform .16s var(--ease),background-color .16s var(--ease)}
.share-btn svg{width:16px;height:16px;stroke:var(--text-1);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.share-btn:hover{border-color:var(--accent);transform:translateY(-2px);background:var(--surface-2)}
.share-btn:hover svg{stroke:var(--accent)}

/* ---------- key points ---------- */
.kp-card{margin-top:34px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);padding:26px 28px;box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.12);backdrop-filter:blur(14px) saturate(140%)}
.kp-title{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:600;color:var(--text-0);letter-spacing:.04em}
.kp-title svg{width:16px;height:16px;stroke:var(--accent);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.kp-list{margin-top:16px;display:grid;gap:12px}
.kp-list li{position:relative;padding-left:16px;font-size:14.5px;line-height:1.8;color:var(--text-1)}
.kp-list li::before{content:"";position:absolute;left:0;top:9px;width:3px;height:14px;border-radius:2px;background:var(--accent);opacity:.85}

/* ---------- prose ---------- */
.reading{padding:68px 0 76px}
.prose{max-width:720px;margin:0 auto;font-size:17px;line-height:1.95;color:var(--text-1)}
.prose > *:first-child{margin-top:0}
.prose p{margin:0 0 22px}
.prose h2{position:relative;margin:44px 0 18px;padding-left:16px;font-size:clamp(21px,2.4vw,24px);line-height:1.45;font-weight:700;color:var(--text-0);letter-spacing:-.01em}
.prose h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:3px;background:var(--accent)}
.prose h3{margin:32px 0 14px;font-size:19px;line-height:1.5;font-weight:600;color:var(--text-0)}
.prose h4{margin:24px 0 12px;font-size:16px;font-weight:600;color:var(--text-0)}
.prose a{color:var(--accent);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.prose a:hover{color:#6ff2de}
.prose ul,.prose ol{margin:0 0 22px;padding-left:4px}
.prose ul li{position:relative;padding-left:20px;margin-bottom:10px}
.prose ul li::before{content:"";position:absolute;left:0;top:12px;width:6px;height:6px;border-radius:50%;background:var(--accent);opacity:.85}
.prose ol{padding-left:22px;list-style:decimal}
.prose ol li{margin-bottom:10px;padding-left:4px}
.prose blockquote{margin:28px 0;padding:18px 22px;border-left:3px solid var(--accent);background:rgba(53,224,200,.06);border-radius:0 var(--r-s) var(--r-s) 0;color:var(--text-1);font-size:16px;line-height:1.9}
.prose blockquote p:last-child{margin-bottom:0}
.prose img{border-radius:var(--r-l);margin:28px 0 10px;border:1px solid var(--line);box-shadow:var(--shadow)}
.prose figure{margin:28px 0}
.prose figcaption{font-size:13px;color:var(--text-2);line-height:1.7;margin-top:10px;text-align:center}
.prose strong{color:var(--text-0);font-weight:600}
.prose table{width:100%;border-collapse:collapse;margin:26px 0;font-size:14.5px}
.prose th,.prose td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.prose th{background:var(--surface-2);color:var(--text-0);font-weight:600}
.prose tbody tr:nth-child(even){background:rgba(255,255,255,.03)}
.prose hr{border:0;border-top:1px solid var(--line);margin:36px 0}

/* ---------- empty state ---------- */
.empty-state{max-width:560px;margin:0 auto;padding:56px 28px;text-align:center;background:var(--surface);border:1px dashed var(--line-strong);border-radius:var(--r-l)}
.empty-state .e-icon{width:56px;height:56px;margin:0 auto 18px;border-radius:16px;border:1px solid var(--line-strong);display:flex;align-items:center;justify-content:center;background:var(--surface-2)}
.empty-state .e-icon svg{width:24px;height:24px;stroke:var(--text-1);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.empty-state h2{font-size:20px;font-weight:600;color:var(--text-0);margin-bottom:10px}
.empty-state p{font-size:14.5px;color:var(--text-1);margin-bottom:22px}

/* ---------- mid figure ---------- */
.mid-figure{max-width:920px;margin:0 auto}
.mid-figure .ph{position:relative;aspect-ratio:16/9;border-radius:var(--r-l);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);background:linear-gradient(140deg,#101A2E,#0B1220)}
.mid-figure .ph img{width:100%;height:100%;object-fit:cover;opacity:.92}
.mid-figure .ph::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,11,20,.1),rgba(7,11,20,.55));pointer-events:none}
.mid-figure figcaption{margin-top:12px;font-size:13px;color:var(--text-2);text-align:center;line-height:1.7}

/* ---------- author card ---------- */
.author-card{max-width:920px;margin:0 auto;display:flex;align-items:flex-start;gap:18px;padding:24px 26px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.12);backdrop-filter:blur(14px) saturate(140%)}
.author-card .avatar{width:52px;height:52px;border-radius:16px;font-size:15px}
.author-card .ac-body{flex:1;min-width:0}
.author-card h3{font-size:16px;font-weight:600;color:var(--text-0)}
.author-card p{font-size:14px;line-height:1.8;color:var(--text-1);margin-top:8px}
.author-card .fix-link{display:inline-flex;align-items:center;gap:6px;margin-top:12px;font-size:13.5px;color:var(--accent);font-weight:600}
.author-card .fix-link svg{width:13px;height:13px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .18s var(--ease)}
.author-card .fix-link:hover svg{transform:translateX(3px)}

/* ---------- related ---------- */
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rel-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);overflow:hidden;box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.1);transition:transform .2s var(--ease),border-color .2s var(--ease)}
.rel-card:hover{transform:translateY(-4px);border-color:var(--accent)}
.rel-card .thumb{position:relative;aspect-ratio:16/9;background:var(--surface-2);overflow:hidden}
.rel-card .thumb img{width:100%;height:100%;object-fit:cover;opacity:.9;transition:transform .4s var(--ease)}
.rel-card:hover .thumb img{transform:scale(1.04)}
.rel-card .thumb .badge{position:absolute;left:12px;top:12px;background:rgba(7,11,20,.72);border:1px solid var(--line-strong);color:var(--accent);backdrop-filter:blur(6px)}
.rel-card .rc-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.rel-card h3{font-size:16.5px;line-height:1.5;font-weight:600;color:var(--text-0);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-card:hover h3{color:var(--accent)}
.rel-card .rc-desc{font-size:13.5px;line-height:1.75;color:var(--text-1);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-card .rc-foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:12px;font-size:12px;color:var(--text-2)}

/* ---------- pager ---------- */
.pager-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;max-width:920px;margin:0 auto}
.pager-item{display:flex;align-items:center;gap:14px;padding:18px 22px;border:1px solid var(--line-strong);border-radius:var(--r-m);background:transparent;transition:border-color .18s var(--ease),background-color .18s var(--ease),transform .18s var(--ease)}
.pager-item:hover{border-color:var(--accent);background:var(--surface);transform:translateY(-2px)}
.pager-item svg{width:18px;height:18px;stroke:var(--accent);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
.pager-item .p-txt{font-size:14px;color:var(--text-0);font-weight:600;line-height:1.5}
.pager-item .p-sub{font-size:12px;color:var(--text-2);line-height:1.5}
.pager-item.next{justify-content:flex-end;text-align:right}
.pager-back{display:flex;justify-content:center;margin-top:26px}

/* ---------- cta ---------- */
.cta-card{position:relative;overflow:hidden;background:linear-gradient(140deg,rgba(47,107,255,.16),rgba(53,224,200,.08)),var(--bg-2);border:1px solid var(--line-strong);border-radius:var(--r-xl);padding:38px 40px;display:flex;align-items:center;justify-content:space-between;gap:28px;box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.14)}
.cta-card::before{content:"";position:absolute;right:-60px;top:-80px;width:280px;height:280px;background:radial-gradient(closest-side,rgba(53,224,200,.28),transparent 70%);filter:blur(60px);pointer-events:none}
.cta-card h2{font-size:clamp(20px,2.2vw,26px);line-height:1.4;font-weight:700;color:var(--text-0);position:relative}
.cta-card p{font-size:14.5px;color:var(--text-1);margin-top:10px;line-height:1.8;position:relative;max-width:600px}
.cta-actions{display:flex;gap:12px;flex-shrink:0;position:relative}
.disclaimer{margin-top:18px;font-size:12px;color:var(--text-2);line-height:1.8;text-align:center}

/* ---------- back top ---------- */
.back-top{position:fixed;right:24px;bottom:28px;width:46px;height:46px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;background:rgba(16,26,46,.85);border:1px solid var(--line-strong);backdrop-filter:blur(10px);cursor:pointer;z-index:110;opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease),border-color .18s var(--ease)}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{border-color:var(--accent)}
.back-top svg{width:18px;height:18px;stroke:var(--text-0);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

/* ---------- footer ---------- */
.site-footer{background:#050810;border-top:1px solid var(--line);padding:64px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand .logo-text{color:var(--text-0);font-size:17px;white-space:normal}
.footer-brand p{font-size:13.5px;line-height:1.85;color:var(--text-2);max-width:340px}
.footer-col h4{font-size:14px;font-weight:600;color:var(--text-0);margin-bottom:16px;letter-spacing:.04em}
.footer-col ul{display:grid;gap:10px}
.footer-col li a{font-size:13.5px;color:var(--text-1)}
.footer-col li a:hover{color:var(--accent)}
.footer-col p{font-size:13.5px;line-height:1.85;color:var(--text-2)}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;margin-top:44px;padding-top:22px;border-top:1px solid var(--line);font-size:12.5px;color:var(--text-2)}
.fb-links{display:flex;flex-wrap:wrap;gap:18px}
.fb-links a{color:var(--text-2)}
.fb-links a:hover{color:var(--accent)}

/* ---------- responsive ---------- */
@media (max-width:1280px){
  .container{padding:0 22px}
}
@media (max-width:1024px){
  .section{padding:72px 0}
  .section--tight{padding:52px 0}
  .nav-main{gap:2px}
  .nav-link{font-size:14px;padding:8px 9px}
  .search-box input{width:130px}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .cta-card{flex-direction:column;align-items:flex-start;padding:32px 28px}
  .cta-actions{width:100%}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .nav-main{display:none}
  .search-box{display:none}
  .menu-toggle{display:flex}
  .header-inner{height:60px;gap:12px}
  .logo-text{font-size:16px}
  .logo-mark{width:36px;height:36px;border-radius:11px}
  .section{padding:52px 0}
  .section--tight{padding:40px 0}
  .reading{padding:44px 0 56px}
  .prose{font-size:16px;line-height:1.9}
  .prose p{margin-bottom:18px}
  .kp-card{padding:20px 18px}
  .article-meta{gap:12px}
  .share-group{margin-left:0;width:100%}
  .related-grid{grid-template-columns:1fr}
  .pager-grid{grid-template-columns:1fr}
  .author-card{flex-direction:column;gap:14px;padding:20px 18px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .site-footer{padding:48px 0 22px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .btn{width:100%}
  .cta-actions{flex-direction:column}
  .back-top{right:16px;bottom:18px;width:42px;height:42px}
  .article-title{font-size:clamp(24px,6.4vw,32px)}
  .meta-inner{font-size:11.5px;gap:10px}
}
@media (max-width:560px){
  .meta-inner .hide-sm{display:none}
  .share-label{display:none}
  .mid-figure .ph{aspect-ratio:16/9;border-radius:var(--r-m)}
  .related-grid{gap:18px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}

/* roulang page: category1 */
:root{
  --bg-0:#070B14;
  --bg-1:#0B1220;
  --bg-2:#101A2E;
  --surface:rgba(255,255,255,.055);
  --surface-2:rgba(255,255,255,.09);
  --line:rgba(138,170,255,.16);
  --line-strong:rgba(138,170,255,.30);
  --primary:#2F6BFF;
  --primary-glow:rgba(47,107,255,.45);
  --accent:#35E0C8;
  --warn:#FFB86B;
  --text-0:#E9EEF9;
  --text-1:#A6B4CE;
  --text-2:#6E7E9C;
  --r-s:10px;
  --r-m:14px;
  --r-l:20px;
  --r-xl:28px;
  --shadow:0 10px 30px rgba(3,8,20,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--text-0);
  background:var(--bg-0);
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block;border-style:none}
a{color:var(--text-0);text-decoration:none;transition:color .16s var(--ease),border-color .16s var(--ease)}
a:hover{color:var(--accent)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:1220px;margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:120;background:#fff;box-shadow:0 6px 20px rgba(10,20,40,.06)}
.site-header::before{content:"";display:block;height:3px;background:linear-gradient(90deg,var(--primary),var(--accent))}
.header-inner{display:flex;align-items:center;gap:24px;height:68px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{width:40px;height:40px;border-radius:12px;background:#0B1220;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 16px rgba(11,18,32,.28)}
.logo-mark svg{width:22px;height:22px;stroke:var(--accent);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.logo-text{font-size:18px;font-weight:600;color:#0B1220;letter-spacing:.01em;white-space:nowrap}
.logo:hover .logo-text{color:var(--primary)}
.nav-main{display:flex;align-items:center;gap:6px;margin-left:8px}
.nav-link{position:relative;display:inline-block;padding:8px 12px;font-size:15px;color:#3A475F;border-radius:8px;transition:color .16s var(--ease)}
.nav-link::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;background:var(--primary);border-radius:2px;transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease)}
.nav-link:hover{color:var(--primary)}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}
.nav-link.active{color:var(--primary);font-weight:600}
.header-right{display:flex;align-items:center;gap:12px;margin-left:auto}
.search-box{display:flex;align-items:center;gap:8px;height:40px;padding:0 14px;background:#F4F6FB;border:1px solid #E7ECF5;border-radius:var(--r-m);transition:border-color .16s var(--ease),box-shadow .16s var(--ease)}
.search-box:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(47,107,255,.14);background:#fff}
.search-box svg{width:16px;height:16px;stroke:#7C8AA5;fill:none;stroke-width:2;stroke-linecap:round;flex-shrink:0}
.search-box input{width:172px;border:0;background:transparent;outline:none;font-size:13.5px;color:#0B1220;font-family:inherit}
.search-box input::placeholder{color:#93A0B8}
.header-cta{padding:10px 18px;font-size:14px}
.menu-toggle{display:none;width:42px;height:42px;border:1px solid #E7ECF5;background:#F4F6FB;border-radius:12px;align-items:center;justify-content:center;cursor:pointer}
.menu-toggle span{display:block;width:18px;height:2px;background:#2B3A55;border-radius:2px;position:relative;transition:background .2s var(--ease)}
.menu-toggle span::before,.menu-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:#2B3A55;border-radius:2px;transition:transform .2s var(--ease)}
.menu-toggle span::before{top:-6px}
.menu-toggle span::after{top:6px}
.menu-toggle.active span{background:transparent}
.menu-toggle.active span::before{transform:translateY(6px) rotate(45deg)}
.menu-toggle.active span::after{transform:translateY(-6px) rotate(-45deg)}
.mobile-drawer{position:fixed;top:0;right:0;width:min(320px,86vw);height:100vh;background:#fff;transform:translateX(102%);transition:transform .28s var(--ease);z-index:130;padding:86px 22px 28px;box-shadow:-20px 0 50px rgba(10,20,40,.18);display:flex;flex-direction:column;gap:4px;overflow-y:auto}
.mobile-drawer.open{transform:translateX(0)}
.mobile-drawer a.drawer-link{display:block;font-size:17px;color:#22304A;padding:13px 4px;border-bottom:1px solid #EEF2F8}
.mobile-drawer a.drawer-link:hover{color:var(--primary)}
.mobile-drawer .btn{margin-top:18px;justify-content:center}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:var(--r-m);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform .18s var(--ease),box-shadow .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);white-space:nowrap;text-decoration:none}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 0 0 1px rgba(47,107,255,.55),0 10px 30px var(--primary-glow)}
.btn-primary:hover{background:#3E78FF;color:#fff;transform:translateY(-2px);box-shadow:0 0 0 1px rgba(47,107,255,.7),0 16px 40px var(--primary-glow)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text-0)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:12px}
.btn-block{width:100%}
.arrow-link{display:inline-flex;align-items:center;gap:6px;color:var(--accent);font-size:14px;font-weight:600}
.arrow-link svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .18s var(--ease)}
.arrow-link:hover svg{transform:translateX(4px)}

/* ---------- section base ---------- */
main{display:block}
.section{padding:96px 0;position:relative}
.section--alt{background:var(--bg-1)}
.section--line{border-top:1px solid var(--line)}
.section-head{max-width:780px;margin-bottom:40px}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:600;letter-spacing:.14em;color:var(--accent);margin-bottom:12px}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--accent);display:inline-block}
.sec-title{font-size:clamp(24px,2.6vw,34px);line-height:1.3;letter-spacing:-.01em}
.sec-sub{color:var(--text-1);font-size:15px;margin-top:12px;max-width:720px}

/* ---------- category hero ---------- */
.cat-hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#08101D 0%,var(--bg-0) 100%);border-bottom:1px solid var(--line);padding:52px 0 44px}
.cat-hero::after{content:"";position:absolute;right:-80px;top:-120px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(53,224,200,.16),transparent 66%);filter:blur(60px);pointer-events:none}
.cat-hero__grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:40px;align-items:end;position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-2);margin-bottom:18px}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{color:var(--text-2);opacity:.6}
.cat-hero h1{font-size:clamp(28px,3.4vw,42px);line-height:1.25;letter-spacing:-.01em;max-width:760px}
.cat-hero h1 .hl{color:var(--accent)}
.cat-lead{margin-top:16px;color:var(--text-1);font-size:15.5px;max-width:700px}
.cat-lead span{display:block}
.cat-stat{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);padding:20px;backdrop-filter:blur(14px) saturate(140%);box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.12)}
.cat-stat__row{display:flex;align-items:baseline;justify-content:space-between;gap:10px;padding:10px 0;border-bottom:1px dashed rgba(138,170,255,.18)}
.cat-stat__row:last-child{border-bottom:0}
.cat-stat__label{font-size:13px;color:var(--text-2)}
.cat-stat__value{font-size:22px;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.cat-stat__value small{font-size:12px;color:var(--text-1);font-weight:500;margin-left:3px}

/* ---------- filter bar ---------- */
.filter-bar{position:sticky;top:71px;z-index:100;background:rgba(11,18,32,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.filter-inner{display:flex;align-items:center;gap:14px;min-height:64px;padding:10px 0;flex-wrap:wrap}
.chip-group{display:flex;align-items:center;gap:8px;overflow-x:auto;scrollbar-width:none;padding:2px}
.chip-group::-webkit-scrollbar{display:none}
.chip{display:inline-flex;align-items:center;height:34px;padding:0 16px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--text-1);font-size:13.5px;white-space:nowrap;cursor:pointer;transition:all .16s var(--ease)}
.chip:hover{border-color:var(--accent);color:var(--accent)}
.chip.is-active{background:rgba(53,224,200,.12);border-color:rgba(53,224,200,.5);color:var(--accent);font-weight:600}
.filter-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.filter-right label{font-size:13px;color:var(--text-2)}
.select-dark{height:36px;border-radius:var(--r-s);background:var(--bg-2);border:1px solid var(--line);color:var(--text-0);font-size:13.5px;padding:0 12px;font-family:inherit;cursor:pointer}
.select-dark:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* ---------- post grid ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.post-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);overflow:hidden;backdrop-filter:blur(14px) saturate(140%);box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.12);transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);display:flex;flex-direction:column}
.post-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 18px 44px rgba(3,8,20,.55),inset 0 1px 0 rgba(255,255,255,.16)}
.post-card__link{display:flex;flex-direction:column;height:100%}
.post-card__thumb{aspect-ratio:16/9;overflow:hidden;background:var(--surface-2);border-bottom:1px solid var(--line)}
.post-card__thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);opacity:.92}
.post-card:hover .post-card__thumb img{transform:scale(1.04);opacity:1}
.post-card__body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-card__title{font-size:18px;line-height:1.5;font-weight:600;color:var(--text-0);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card__excerpt{font-size:14px;line-height:1.75;color:var(--text-1);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card__meta{margin-top:auto;display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--text-2);padding-top:8px;border-top:1px dashed rgba(138,170,255,.16)}
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;font-size:12px;font-weight:600;letter-spacing:.02em}
.badge-cyan{background:rgba(53,224,200,.12);color:var(--accent);border:1px solid rgba(53,224,200,.28)}
.badge-warn{background:rgba(255,184,107,.12);color:var(--warn);border:1px solid rgba(255,184,107,.28)}
.meta-dot{width:3px;height:3px;border-radius:50%;background:var(--text-2)}
.list-foot{display:flex;justify-content:center;margin-top:40px}
.empty-state{border:1px dashed var(--line-strong);border-radius:var(--r-l);padding:56px 24px;text-align:center;background:var(--surface)}
.empty-state svg{width:44px;height:44px;stroke:var(--text-2);fill:none;stroke-width:1.5;margin:0 auto 14px}
.empty-state p{color:var(--text-1);font-size:15px;margin-bottom:18px}

/* ---------- guide + toc ---------- */
.guide-grid{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:40px;align-items:start}
.prose p{color:var(--text-1);font-size:16px;line-height:1.95;margin-bottom:18px}
.prose p strong{color:var(--text-0);font-weight:600}
.prose h3{font-size:19px;color:var(--text-0);margin:28px 0 12px;padding-left:12px;border-left:3px solid var(--accent);line-height:1.45}
.toc-card{position:sticky;top:160px;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-l);padding:22px;box-shadow:var(--shadow)}
.toc-card h4{font-size:14px;color:var(--text-0);letter-spacing:.06em;margin-bottom:14px}
.toc-card li a{display:block;padding:9px 0 9px 14px;font-size:14px;color:var(--text-1);border-left:2px solid transparent;transition:all .16s var(--ease)}
.toc-card li a:hover{color:var(--accent);border-left-color:var(--accent);background:rgba(255,255,255,.04)}

/* ---------- scene cards ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.scene-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);overflow:hidden;box-shadow:var(--shadow);transition:transform .2s var(--ease),border-color .2s var(--ease)}
.scene-card:hover{transform:translateY(-4px);border-color:var(--accent)}
.scene-card__img{aspect-ratio:4/3;overflow:hidden;background:var(--surface-2)}
.scene-card__img img{width:100%;height:100%;object-fit:cover;opacity:.9;transition:transform .5s var(--ease)}
.scene-card:hover .scene-card__img img{transform:scale(1.05)}
.scene-card__body{padding:20px}
.scene-card__body h3{font-size:18px;margin-bottom:8px;line-height:1.45}
.scene-card__body p{font-size:14px;color:var(--text-1);line-height:1.75}

/* ---------- pill list / topics ---------- */
.topic-cols{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 24px}
.topic-item{display:flex;align-items:center;gap:14px;padding:14px 18px;border:1px solid var(--line);border-radius:var(--r-m);background:var(--surface);transition:all .16s var(--ease)}
.topic-item:hover{background:rgba(255,255,255,.08);border-color:var(--accent)}
.topic-item span.idx{font-size:13px;color:var(--accent);font-variant-numeric:tabular-nums;width:22px;flex-shrink:0}
.topic-item span.txt{font-size:15px;color:var(--text-0)}
.topic-item svg{margin-left:auto;width:14px;height:14px;stroke:var(--text-2);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .16s var(--ease),stroke .16s var(--ease)}
.topic-item:hover svg{transform:translateX(4px);stroke:var(--accent)}

/* ---------- faq ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-m);padding:0 20px;transition:border-color .16s var(--ease),background-color .16s var(--ease)}
.faq-item[open]{background:rgba(53,224,200,.05);border-color:rgba(53,224,200,.35);border-left:3px solid var(--accent)}
.faq-item summary{cursor:pointer;list-style:none;padding:18px 0;font-size:17px;font-weight:600;color:var(--text-0);display:flex;align-items:center;gap:12px;line-height:1.6}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";margin-left:auto;color:var(--accent);font-size:20px;font-weight:400;line-height:1;transition:transform .2s var(--ease)}
.faq-item[open] summary::after{content:"−"}
.faq-item p{font-size:15px;color:var(--text-1);line-height:1.8;padding:0 0 18px;max-width:760px}

/* ---------- notice + cta ---------- */
.notice-bar{display:flex;align-items:flex-start;gap:14px;padding:22px 24px;border:1px solid var(--line);border-radius:var(--r-l);background:var(--bg-2);box-shadow:var(--shadow)}
.notice-bar svg{width:22px;height:22px;stroke:var(--warn);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;margin-top:3px}
.notice-bar p{font-size:14px;color:var(--text-1);line-height:1.85}
.notice-bar strong{color:var(--text-0);font-weight:600}
.cta-card{margin-top:32px;background:linear-gradient(135deg,rgba(47,107,255,.16),rgba(53,224,200,.08));border:1px solid var(--line-strong);border-radius:var(--r-xl);padding:40px;display:flex;align-items:center;justify-content:space-between;gap:28px;box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.12)}
.cta-card h2{font-size:clamp(22px,2.2vw,28px);line-height:1.35;margin-bottom:8px}
.cta-card p{color:var(--text-1);font-size:14.5px;max-width:620px}
.disclaimer{font-size:12px;color:var(--text-2);line-height:1.8;margin-top:18px}

/* ---------- update note ---------- */
.update-note{display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;font-size:13px;color:var(--text-2);border-top:1px solid var(--line);padding-top:24px;margin-top:12px}
.update-note .dot-live{display:inline-flex;align-items:center;gap:8px;color:var(--text-1)}
.update-note .dot-live i{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(53,224,200,.15);display:inline-block}
.back-top{position:fixed;right:24px;bottom:28px;width:46px;height:46px;border-radius:50%;background:rgba(255,255,255,.07);border:1px solid var(--line-strong);display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:110;backdrop-filter:blur(10px);transition:all .18s var(--ease);opacity:0;pointer-events:none}
.back-top.show{opacity:1;pointer-events:auto}
.back-top:hover{border-color:var(--accent);transform:translateY(-3px)}
.back-top svg{width:18px;height:18px;stroke:var(--accent);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

/* ---------- footer ---------- */
.site-footer{background:#050810;border-top:1px solid var(--line);padding-top:64px;color:var(--text-1)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1.2fr 1.2fr;gap:36px;padding-bottom:44px}
.footer-brand .logo{margin-bottom:14px}
.footer-brand .logo-text{color:var(--text-0);font-size:17px}
.footer-brand p{font-size:14px;line-height:1.9;color:var(--text-1);max-width:360px}
.footer-col h4{font-size:14px;color:var(--text-0);letter-spacing:.06em;margin-bottom:16px}
.footer-col ul li a{font-size:14px;color:var(--text-1);display:inline-block;padding:5px 0;transition:all .16s var(--ease)}
.footer-col ul li a:hover{color:var(--accent);transform:translateX(3px)}
.footer-col p{font-size:14px;line-height:1.9;color:var(--text-1)}
.footer-bottom{border-top:1px solid var(--line);padding:20px 0;display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:13px;color:var(--text-2)}
.fb-links{display:flex;gap:18px;flex-wrap:wrap}
.fb-links a{color:var(--text-2)}
.fb-links a:hover{color:var(--accent)}

/* ---------- responsive ---------- */
@media (max-width:1280px){
  .container{padding:0 22px}
}
@media (max-width:1024px){
  .section{padding:64px 0}
  .cat-hero__grid{grid-template-columns:1fr;gap:24px;align-items:start}
  .cat-stat{max-width:420px}
  .post-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .guide-grid{grid-template-columns:1fr;gap:28px}
  .toc-card{position:static}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .search-box input{width:130px}
  .nav-main{gap:2px}
  .nav-link{padding:8px 9px;font-size:14.5px}
}
@media (max-width:900px){
  .nav-main,.search-box{display:none}
  .menu-toggle{display:flex}
  .header-cta{display:none}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .section{padding:52px 0}
  .header-inner{height:60px;gap:14px}
  .logo-text{font-size:16px}
  .logo-mark{width:36px;height:36px;border-radius:10px}
  .cat-hero{padding:36px 0 32px}
  .filter-bar{top:63px}
  .filter-inner{min-height:58px;gap:10px}
  .post-grid,.scene-grid{grid-template-columns:1fr}
  .topic-cols{grid-template-columns:1fr}
  .cta-card{flex-direction:column;align-items:flex-start;padding:28px 22px}
  .cta-card .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .site-footer{padding-top:48px}
  .back-top{right:16px;bottom:18px;width:42px;height:42px}
}
@media (max-width:560px){
  .cat-stat{padding:16px}
  .cat-stat__value{font-size:19px}
  .post-card__body{padding:18px}
  .filter-right{width:100%;margin-left:0;justify-content:space-between}
  .faq-item summary{font-size:16px}
  .notice-bar{padding:18px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}