/* roulang page: index */
:root{
  --bg:#0A1A2E;
  --panel:#0E2540;
  --glass:rgba(255,255,255,0.055);
  --glass-strong:rgba(255,255,255,0.09);
  --line:rgba(255,255,255,0.10);
  --line-strong:rgba(255,255,255,0.12);
  --amber:#FF8A3D;
  --amber-soft:rgba(255,138,61,0.45);
  --amber-glow:rgba(255,138,61,0.35);
  --cyan:#4CC9E0;
  --text:#EAF2FA;
  --muted:#9DB2C6;
  --r-lg:20px;
  --r-md:14px;
  --r-img:16px;
  --shadow:0 18px 40px rgba(0,0,0,0.35);
  --shadow-soft:0 10px 24px rgba(0,0,0,0.25);
  --font:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background-color:var(--bg);
  background-image:linear-gradient(rgba(255,255,255,0.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,0.03) 1px,transparent 1px);
  background-size:48px 48px,48px 48px;
  background-attachment:fixed;
  color:var(--text);
  font-family:var(--font);
  font-size:15.5px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:var(--text);text-decoration:none;transition:color .25s ease,border-color .25s ease,background-color .25s ease}
a:hover{color:var(--amber)}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding-left:1.15rem}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
:focus-visible{outline:2px solid var(--amber);outline-offset:2px}
h1{font-size:clamp(30px,4.4vw,52px);font-weight:700;line-height:1.22;letter-spacing:.2px}
h2{font-size:clamp(24px,2.6vw,32px);font-weight:650;line-height:1.3}
h3{font-size:20px;font-weight:650;line-height:1.4}
.grid-container{max-width:1200px;padding-left:20px;padding-right:20px}
.num,.metric-value,.stat-num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* ---------- 顶栏 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,26,46,0.82);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--line-strong);
}
.header-inner{display:flex;align-items:center;gap:18px;min-height:68px;padding-top:10px;padding-bottom:10px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  background:linear-gradient(140deg,var(--amber),#FF6A16);
  display:flex;align-items:center;justify-content:center;
  font-weight:700;color:#1A0E04;font-size:15px;
  box-shadow:0 0 22px var(--amber-glow);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-name{font-weight:700;font-size:17px;letter-spacing:.3px}
.brand-sub{font-size:11.5px;color:var(--muted);letter-spacing:.5px}
.header-search{flex:1 1 auto;max-width:360px}
.search-box{display:flex;background:rgba(255,255,255,0.05);border:1px solid var(--line);border-radius:12px;overflow:hidden}
.search-box input{
  flex:1;background:transparent;border:0;padding:9px 12px;color:var(--text);min-width:0;
}
.search-box input::placeholder{color:rgba(157,178,198,.75)}
.search-box button{
  border:0;background:rgba(255,138,61,.14);color:var(--amber);
  padding:0 14px;cursor:pointer;font-weight:600;letter-spacing:.3px;
}
.search-box button:hover{background:rgba(255,138,61,.26)}
.header-tools{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.ghost-select{
  background:rgba(255,255,255,0.05);border:1px solid var(--line);border-radius:11px;
  padding:8px 10px;color:var(--text);cursor:pointer;
}
.ghost-select option{background:var(--panel);color:var(--text)}
.lang-switch{display:flex;border:1px solid var(--line);border-radius:11px;overflow:hidden}
.lang-switch a{padding:7px 11px;font-size:13px;color:var(--muted)}
.lang-switch a.is-active{background:rgba(255,138,61,.16);color:var(--amber)}
.hamburger{
  display:none;background:rgba(255,255,255,0.05);border:1px solid var(--line);
  border-radius:11px;padding:8px 11px;cursor:pointer;
}
.hamburger span{display:block;width:18px;height:2px;background:var(--text);margin:3px 0;border-radius:2px}

/* ---------- 主导航 ---------- */
.main-nav{border-top:1px solid var(--line);background:rgba(10,26,46,0.6)}
.main-nav ul{display:flex;flex-wrap:wrap;gap:4px;list-style:none;margin:0;padding:0}
.main-nav a{
  display:block;padding:11px 16px;font-size:14.5px;color:var(--muted);
  border-bottom:2px solid transparent;
}
.main-nav a:hover{color:var(--text);background:rgba(255,255,255,.04)}
.main-nav a.is-active{color:var(--amber);border-bottom-color:var(--amber)}

/* ---------- 布局 ---------- */
.shell{padding-top:32px;padding-bottom:48px}
.shell-grid{display:grid;grid-template-columns:260px minmax(0,1fr);gap:34px;align-items:start}

/* ---------- 侧栏目录 ---------- */
.doc-side{position:sticky;top:96px}
.side-panel{
  background:var(--glass);border:1px solid var(--line-strong);border-radius:var(--r-lg);
  padding:18px 16px;box-shadow:var(--shadow-soft);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
}
.side-group+.side-group{margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}
.side-title{font-size:12.5px;letter-spacing:1.2px;color:var(--muted);margin-bottom:8px}
.side-list{list-style:none;margin:0;padding:0}
.side-list li{margin:0}
.side-list a{
  display:block;padding:8px 10px;font-size:14px;color:var(--muted);
  border-left:2px solid transparent;border-radius:0 8px 8px 0;
}
.side-list a:hover{color:var(--text);background:rgba(255,255,255,.04)}
.side-list a.is-current{color:var(--text);border-left-color:var(--amber);background:rgba(255,138,61,.08)}
.side-cat{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding:11px 12px;border:1px solid var(--line-strong);border-radius:var(--r-md);
  background:rgba(255,138,61,.07);font-size:14px;
}
.side-cat:hover{border-color:var(--amber-soft);color:var(--amber)}
.side-cat .arrow{color:var(--amber)}

/* ---------- 通用板块 ---------- */
.section{margin-bottom:56px}
.section:last-child{margin-bottom:0}
.section-head{margin-bottom:24px;max-width:760px}
.section-tag{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:1.2px;
  color:var(--amber);margin-bottom:10px;
}
.section-tag::before{content:"";width:22px;height:1px;background:var(--amber-soft)}
.section-head p{color:var(--muted);margin-top:10px}
.rule-scale{height:11px;border-bottom:1px solid var(--line);background-image:repeating-linear-gradient(90deg,var(--line) 0 1px,transparent 1px 14px);background-size:auto 6px;background-repeat:repeat-x;background-position:left bottom;margin:14px 0 0}
.glass-card{
  background:var(--glass);border:1px solid var(--line-strong);border-radius:var(--r-lg);
  box-shadow:var(--shadow);padding:22px;
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  transition:border-color .25s ease,transform .25s ease,box-shadow .25s ease;
}
.glass-card:hover{border-color:var(--amber-soft);transform:translateY(-2px)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:12px;font-weight:650;font-size:15px;
  border:1px solid transparent;cursor:pointer;transition:all .25s ease;
}
.btn-primary{
  background:var(--amber);color:#1A0E04;
  box-shadow:0 0 24px var(--amber-glow);
}
.btn-primary:hover{box-shadow:0 0 36px var(--amber-glow);transform:translateY(-2px);color:#1A0E04}
.btn-ghost{background:rgba(255,255,255,0.05);border-color:var(--line-strong);color:var(--text)}
.btn-ghost:hover{border-color:var(--amber-soft);color:var(--amber);transform:translateY(-2px)}
.btn-sm{padding:8px 15px;font-size:13.5px;border-radius:10px}
.text-link{color:var(--amber);font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;border-bottom:1px solid rgba(255,138,61,.35);padding-bottom:2px}
.text-link:hover{color:#FFB37A;border-bottom-color:#FFB37A}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;
  background:rgba(255,255,255,.06);border:1px solid var(--line);font-size:12.5px;color:var(--muted);
}
.tag-amber{color:var(--amber);border-color:rgba(255,138,61,.4);background:rgba(255,138,61,.1)}
.tag-cyan{color:var(--cyan);border-color:rgba(76,201,224,.4);background:rgba(76,201,224,.1)}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;color:var(--muted);font-size:13px}

/* ---------- Hero ---------- */
.hero{position:relative;border-radius:26px;overflow:hidden;border:1px solid var(--line-strong);box-shadow:var(--shadow);margin-bottom:44px}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;transform:scale(1.02)}
.hero-veil{position:absolute;inset:0;background:linear-gradient(105deg,rgba(10,26,46,.96) 0%,rgba(10,26,46,.86) 46%,rgba(14,37,64,.62) 100%)}
.hero-inner{position:relative;padding:52px 0 46px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 13px;border-radius:999px;
  background:rgba(255,138,61,.12);border:1px solid rgba(255,138,61,.4);
  color:var(--amber);font-size:12.5px;letter-spacing:.8px;margin-bottom:16px;
}
.hero h1{margin-bottom:16px}
.hero-lead{color:#C7D7E6;max-width:640px;font-size:15.5px}
.cta-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.hero-bento{display:grid;gap:14px}
.bento-card{
  background:rgba(255,255,255,0.06);border:1px solid var(--line-strong);border-radius:var(--r-lg);
  padding:18px;backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
}
.bento-main{border-color:rgba(255,138,61,.38);background:rgba(255,138,61,.08)}
.bento-main .bento-title{font-size:18px;font-weight:650;margin-bottom:6px}
.bento-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.bento-card .num{font-size:30px;font-weight:700;color:var(--amber);display:block;line-height:1.2}
.bento-card .cap{font-size:13px;color:var(--muted)}
.hero-facts{display:flex;flex-wrap:wrap;gap:22px;margin-top:28px;padding-top:20px;border-top:1px solid var(--line)}
.hero-facts div span{display:block;font-size:13px;color:var(--muted)}
.hero-facts div strong{font-size:20px;font-variant-numeric:tabular-nums}

/* ---------- 指标看板 ---------- */
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.metric-card{
  background:var(--glass);border:1px solid var(--line-strong);border-left:3px solid var(--amber);
  border-radius:var(--r-md);padding:20px 18px;box-shadow:var(--shadow-soft);
  backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);
  transition:border-color .25s ease,transform .25s ease;
}
.metric-card:hover{transform:translateY(-2px);border-color:var(--amber-soft);border-left-color:var(--amber)}
.metric-value{font-size:34px;font-weight:700;color:var(--amber);line-height:1.15}
.metric-value small{font-size:15px;color:var(--muted);margin-left:4px;font-weight:500}
.metric-label{font-size:15px;font-weight:600;margin:6px 0 4px}
.metric-desc{font-size:13.5px;color:var(--muted)}

/* ---------- 功能矩阵 ---------- */
.feature-wrap{display:grid;grid-template-columns:minmax(0,0.82fr) minmax(0,1.6fr);gap:28px;align-items:start}
.feature-notes{position:sticky;top:150px}
.feature-notes h2{margin-bottom:12px}
.feature-notes p{color:var(--muted)}
.feature-notes .rule-scale{margin-top:18px}
.feature-grid{display:grid;grid-template-columns:1.06fr 1fr;gap:16px}
.feature-card{
  background:var(--glass);border:1px solid var(--line-strong);border-radius:var(--r-lg);
  padding:20px;box-shadow:var(--shadow-soft);
  backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);
  transition:border-color .25s ease,transform .25s ease;
  display:flex;flex-direction:column;gap:10px;
}
.feature-card:hover{border-color:var(--amber-soft);transform:translateY(-2px)}
.feature-card.tall{padding-bottom:26px}
.f-icon{
  width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:rgba(76,201,224,.12);border:1px solid rgba(76,201,224,.35);color:var(--cyan);
}
.feature-card h3{font-size:18.5px}
.feature-card p{color:var(--muted);font-size:14.5px}
.feature-card .text-link{margin-top:auto}

/* ---------- 结果对比 ---------- */
.compare-wrap{display:grid;grid-template-columns:1fr 44px 1fr;gap:18px;align-items:stretch}
.compare-panel{
  background:var(--glass);border:1px solid var(--line-strong);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--shadow-soft);
  backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);
}
.compare-panel.is-good{border-color:rgba(255,138,61,.4);background:rgba(255,138,61,.065)}
.compare-head{display:flex;align-items:center;gap:10px;margin-bottom:14px;font-weight:650}
.dot{width:9px;height:9px;border-radius:50%;display:inline-block}
.dot-cyan{background:var(--cyan);box-shadow:0 0 10px rgba(76,201,224,.7)}
.dot-amber{background:var(--amber);box-shadow:0 0 12px var(--amber-glow)}
.compare-list{list-style:none;padding:0;margin:0}
.compare-list li{display:flex;gap:10px;padding:9px 0;border-bottom:1px dashed var(--line);font-size:14.5px;color:#CBD9E6}
.compare-list li:last-child{border-bottom:0}
.compare-list li i{color:var(--muted);font-style:normal}
.compare-divider{
  position:relative;border-left:1px solid var(--line);
  background-image:repeating-linear-gradient(180deg,var(--line) 0 1px,transparent 1px 12px);
  background-size:6px auto;background-repeat:repeat-y;background-position:left top;
}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;padding-left:0}
.timeline::before{content:"";position:absolute;left:50%;top:6px;bottom:6px;width:1px;background:var(--line);transform:translateX(-50%)}
.tl-item{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:34px;margin-bottom:22px}
.tl-card{
  background:var(--glass);border:1px solid var(--line-strong);border-radius:var(--r-lg);
  padding:20px;box-shadow:var(--shadow-soft);
  backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);
  transition:border-color .25s ease,transform .25s ease;
}
.tl-card:hover{border-color:var(--amber-soft);transform:translateY(-2px)}
.tl-ver{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.tl-ver strong{font-size:18px;font-variant-numeric:tabular-nums}
.tl-ver span{font-size:13px;color:var(--muted)}
.tl-card p{color:var(--muted);font-size:14.5px}
.tl-node{
  position:absolute;left:50%;top:26px;width:13px;height:13px;border-radius:50%;
  background:var(--amber);transform:translate(-50%,-50%);
  box-shadow:0 0 0 4px rgba(255,138,61,.18),0 0 18px var(--amber-glow);
}
.tl-item:nth-child(odd) .tl-card{grid-column:1}
.tl-item:nth-child(even) .tl-card{grid-column:2}

/* ---------- 场景专题 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.scene-card{
  position:relative;overflow:hidden;border-radius:var(--r-lg);border:1px solid var(--line-strong);
  box-shadow:var(--shadow);min-height:230px;display:flex;align-items:flex-end;
  transition:border-color .25s ease,transform .25s ease;
}
.scene-card:hover{border-color:var(--amber-soft);transform:translateY(-2px)}
.scene-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;border-radius:0}
.scene-mask{position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,26,46,.15) 20%,rgba(10,26,46,.92) 100%)}
.scene-body{position:relative;padding:22px}
.scene-body h3{font-size:19px;margin-bottom:6px}
.scene-body p{color:var(--muted);font-size:14px;margin-bottom:10px}

/* ---------- 步骤条 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;position:relative}
.step{
  background:var(--glass);border:1px solid var(--line-strong);border-radius:var(--r-lg);
  padding:20px;box-shadow:var(--shadow-soft);position:relative;
  backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);
  transition:border-color .25s ease,transform .25s ease;
}
.step:hover{border-color:var(--amber-soft);transform:translateY(-2px)}
.step-num{font-size:22px;font-weight:700;color:var(--amber);font-variant-numeric:tabular-nums}
.step h3{font-size:17px;margin:6px 0 8px}
.step p{color:var(--muted);font-size:14px}

/* ---------- 表格 ---------- */
.table-wrap{
  border:1px solid var(--line-strong);border-radius:var(--r-lg);background:var(--glass);
  box-shadow:var(--shadow-soft);overflow-x:auto;
}
table.device-table{width:100%;border-collapse:collapse;min-width:620px;margin:0;background:transparent}
table.device-table th,table.device-table td{
  padding:14px 18px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--line);
}
table.device-table thead th{color:var(--muted);font-weight:600;font-size:13.5px;letter-spacing:.4px;background:rgba(255,255,255,.03)}
table.device-table tbody tr:hover{background:rgba(255,255,255,.035)}
table.device-table tbody tr:last-child td{border-bottom:0}

/* ---------- 资讯列表 ---------- */
.news-list{display:grid;gap:16px}
.news-item{
  display:grid;grid-template-columns:200px minmax(0,1fr);gap:20px;align-items:center;
  background:var(--glass);border:1px solid var(--line-strong);border-radius:var(--r-lg);
  padding:16px;box-shadow:var(--shadow-soft);
  backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);
  transition:border-color .25s ease,transform .25s ease;
}
.news-item:hover{border-color:var(--amber-soft);transform:translateY(-2px)}
.news-thumb{position:relative;border-radius:var(--r-img);overflow:hidden}
.news-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0}
.news-thumb::after{content:"";position:absolute;inset:0;background:rgba(10,26,46,.18)}
.news-item h3{font-size:17.5px;margin-bottom:6px}
.news-item p{color:var(--muted);font-size:14px}

/* ---------- 分类入口 ---------- */
.cat-panel{
  background:var(--glass);border:1px solid var(--line-strong);border-radius:var(--r-lg);
  padding:22px;box-shadow:var(--shadow);backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
}
.cat-main{
  display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 18px;
  border:1px solid rgba(255,138,61,.38);background:rgba(255,138,61,.08);border-radius:var(--r-md);
  transition:all .25s ease;
}
.cat-main:hover{border-color:var(--amber);transform:translateY(-2px)}
.cat-main strong{display:block;font-size:17px}
.cat-main span{font-size:13.5px;color:var(--muted)}
.cat-main .arrow{font-size:20px;color:var(--amber)}
.cat-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}

/* ---------- 保障 ---------- */
.guard-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.guard-item{
  display:flex;gap:14px;padding:18px;border:1px solid var(--line-strong);border-radius:var(--r-md);
  background:rgba(255,255,255,.045);
  transition:border-color .25s ease,transform .25s ease;
}
.guard-item:hover{border-color:var(--amber-soft);transform:translateY(-2px)}
.guard-icon{
  flex:0 0 auto;width:38px;height:38px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  background:rgba(76,201,224,.12);border:1px solid rgba(76,201,224,.32);color:var(--cyan);
}
.guard-item h3{font-size:16.5px;margin-bottom:4px}
.guard-item p{color:var(--muted);font-size:14px}

/* ---------- 快速解答 ---------- */
.quick-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.quick-card{
  position:relative;background:var(--glass);border:1px solid var(--line-strong);
  border-radius:var(--r-lg);padding:22px 20px 18px;box-shadow:var(--shadow-soft);
  backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);
  transition:border-color .25s ease,transform .25s ease;
}
.quick-card::before{content:"";position:absolute;left:20px;top:0;width:38px;height:3px;background:var(--amber);border-radius:0 0 3px 3px;box-shadow:0 0 14px var(--amber-glow)}
.quick-card:hover{border-color:var(--amber-soft);transform:translateY(-2px)}
.quick-card h3{font-size:17px;margin-bottom:8px}
.quick-card p{color:var(--muted);font-size:14px;margin-bottom:12px}

/* ---------- FAQ ---------- */
.accordion{border:0;background:transparent}
.accordion .accordion-item{
  background:var(--glass);border:1px solid var(--line-strong);border-radius:var(--r-md);
  margin-bottom:12px;overflow:hidden;
}
.accordion .accordion-title{
  border:0;background:transparent;color:var(--text);font-weight:600;font-size:15.5px;
  padding:16px 46px 16px 18px;transition:background-color .25s ease,color .25s ease;
}
.accordion .accordion-title::before{
  content:"+";float:right;font-size:20px;line-height:1;color:var(--amber);margin-right:-26px;
}
.accordion .accordion-item.is-active .accordion-title::before{content:"–"}
.accordion .accordion-title:hover{background:rgba(255,255,255,.05);color:var(--amber)}
.accordion .accordion-item.is-active{background:rgba(255,255,255,.085);border-color:var(--amber-soft)}
.accordion .accordion-content{border:0;background:transparent;color:var(--muted);padding:0 18px 18px;font-size:14.5px}

/* ---------- 表单 ---------- */
.form-wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);gap:26px;align-items:start}
.form-side h2{margin-bottom:12px}
.form-side p{color:var(--muted)}
.form-side ul{color:var(--muted);font-size:14.5px;margin-top:14px}
.form-card{
  background:var(--glass);border:1px solid var(--line-strong);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--shadow);
  backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);
}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;color:var(--muted);margin-bottom:7px}
.field input,.field select,.field textarea{
  width:100%;background:rgba(255,255,255,.05);border:1px solid var(--line-strong);
  border-radius:12px;padding:11px 13px;transition:border-color .25s ease,box-shadow .25s ease;
}
.field textarea{min-height:104px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--amber);box-shadow:0 0 0 4px rgba(255,138,61,.18);
}
.field select option{background:var(--panel)}
.form-note{font-size:12.8px;color:var(--muted);margin-top:12px}
.form-msg{font-size:13.5px;color:var(--cyan);margin-top:10px;min-height:20px}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line-strong);background:rgba(9,22,39,.85);margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:28px;padding:44px 0 32px}
.footer-col h4{font-size:14px;color:var(--text);margin-bottom:12px;letter-spacing:.4px}
.footer-col p,.footer-col li{color:var(--muted);font-size:14px}
.footer-col ul{list-style:none;padding:0;margin:0}
.footer-col ul li{margin-bottom:8px}
.footer-col a{color:var(--muted)}
.footer-col a:hover{color:var(--amber)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.footer-copy{border-top:1px solid var(--line);padding:18px 0;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;color:var(--muted);font-size:13px}

/* ---------- 浮动按钮 / 抽屉 ---------- */
.to-top,.to-side{
  position:fixed;right:22px;z-index:70;width:48px;height:48px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;border:1px solid rgba(255,138,61,.5);
  background:rgba(255,138,61,.16);color:var(--amber);cursor:pointer;
  box-shadow:0 0 24px var(--amber-glow);opacity:0;pointer-events:none;transition:opacity .25s ease,transform .25s ease;
  font-size:13px;
}
.to-side{bottom:84px}
.to-top{bottom:24px}
.to-top.is-on,.to-side.is-on{opacity:1;pointer-events:auto}
.to-top:hover,.to-side:hover{transform:translateY(-2px);background:rgba(255,138,61,.28)}
.drawer-mask{position:fixed;inset:0;background:rgba(4,10,20,.6);opacity:0;pointer-events:none;transition:opacity .25s ease;z-index:80}
.drawer-mask.is-on{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;left:0;bottom:0;width:290px;max-width:84vw;z-index:90;
  background:rgba(12,28,48,.97);border-right:1px solid var(--line-strong);
  transform:translateX(-102%);transition:transform .28s ease;padding:22px 18px;overflow-y:auto;
}
.drawer.is-on{transform:translateX(0)}
.drawer-close{background:transparent;border:1px solid var(--line);border-radius:10px;padding:6px 11px;cursor:pointer;color:var(--muted);margin-bottom:14px}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1024px){
  .shell-grid{grid-template-columns:1fr}
  .doc-side{display:none}
  .hamburger{display:block}
  .header-search{max-width:none;order:3;flex-basis:100%}
  .header-inner{flex-wrap:wrap}
  .metric-grid{grid-template-columns:repeat(2,1fr)}
  .feature-wrap{grid-template-columns:1fr}
  .feature-notes{position:static}
  .steps{grid-template-columns:repeat(2,1fr)}
  .quick-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .to-side{display:none}
}
@media screen and (max-width:768px){
  .hero-inner{padding:34px 0 30px}
  .compare-wrap{grid-template-columns:1fr}
  .compare-divider{display:none}
  .scene-grid{grid-template-columns:1fr}
  .guard-grid{grid-template-columns:1fr}
  .form-wrap{grid-template-columns:1fr}
  .news-item{grid-template-columns:1fr}
  .timeline::before{left:8px}
  .tl-item{grid-template-columns:1fr;padding-left:26px;gap:0}
  .tl-item:nth-child(odd) .tl-card,.tl-item:nth-child(even) .tl-card{grid-column:1}
  .tl-node{left:8px;top:30px}
  .main-nav ul{overflow-x:auto;flex-wrap:nowrap;-webkit-overflow-scrolling:touch}
  .main-nav a{white-space:nowrap}
  .header-tools{flex-wrap:wrap;gap:8px}
}
@media screen and (max-width:520px){
  body{font-size:15px}
  .grid-container{padding-left:15px;padding-right:15px}
  .metric-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .feature-grid{grid-template-columns:1fr}
  .bento-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .glass-card,.form-card,.cat-panel{padding:18px}
  .cta-row .btn{width:100%}
  .brand-sub{display:none}
}

/* roulang page: category1 */
:root{
  --bg:#0A1A2E;
  --panel:#0E2540;
  --glass:rgba(255,255,255,0.055);
  --glass-strong:rgba(255,255,255,0.09);
  --line:rgba(255,255,255,0.10);
  --line-strong:rgba(255,255,255,0.12);
  --amber:#FF8A3D;
  --amber-soft:rgba(255,138,61,0.45);
  --amber-glow:rgba(255,138,61,0.35);
  --cyan:#4CC9E0;
  --text:#EAF2FA;
  --muted:#9DB2C6;
  --r-lg:20px;
  --r-md:14px;
  --r-img:16px;
  --shadow:0 18px 40px rgba(0,0,0,0.35);
  --shadow-soft:0 10px 24px rgba(0,0,0,0.25);
  --font:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background-color:var(--bg);
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,0.03) 1px,transparent 1px);
  background-size:48px 48px,48px 48px;
  background-attachment:fixed;
  color:var(--text);
  font-family:var(--font);
  font-size:15.5px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:var(--text);text-decoration:none;transition:color .25s ease,border-color .25s ease,background-color .25s ease}
a:hover{color:var(--amber)}
p{margin:0 0 12px}
h1,h2,h3,h4{margin:0;font-weight:650;letter-spacing:.2px}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
:focus-visible{outline:2px solid var(--amber);outline-offset:2px}
.grid-container{max-width:1200px;padding-left:20px;padding-right:20px;margin:0 auto}
/* ---------- 顶栏 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,26,46,0.82);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--line-strong);
}
.header-inner{display:flex;align-items:center;gap:18px;min-height:68px;padding-top:10px;padding-bottom:10px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  background:linear-gradient(140deg,var(--amber),#FF6A16);
  display:flex;align-items:center;justify-content:center;
  font-weight:700;color:#1A0E04;font-size:15px;
  box-shadow:0 0 22px var(--amber-glow);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-name{font-weight:700;font-size:17px;letter-spacing:.3px}
.brand-sub{font-size:11.5px;color:var(--muted);letter-spacing:.5px}
.header-search{flex:1 1 auto;max-width:360px}
.search-box{display:flex;background:rgba(255,255,255,0.05);border:1px solid var(--line);border-radius:12px;overflow:hidden;margin:0}
.search-box input{flex:1;background:transparent;border:0;padding:9px 12px;color:var(--text);min-width:0;margin:0}
.search-box input::placeholder{color:rgba(157,178,198,.75)}
.search-box button{border:0;background:rgba(255,138,61,.14);color:var(--amber);padding:0 14px;cursor:pointer;font-weight:600;letter-spacing:.3px}
.search-box button:hover{background:rgba(255,138,61,.26)}
.header-tools{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.ghost-select{background:rgba(255,255,255,0.05);border:1px solid var(--line);border-radius:11px;padding:8px 10px;color:var(--text);cursor:pointer;margin:0}
.ghost-select option{background:var(--panel);color:var(--text)}
.lang-switch{display:flex;border:1px solid var(--line);border-radius:11px;overflow:hidden}
.lang-switch a{padding:7px 11px;font-size:13px;color:var(--muted)}
.lang-switch a.is-active{background:rgba(255,138,61,.16);color:var(--amber)}
.hamburger{display:none;background:rgba(255,255,255,0.05);border:1px solid var(--line);border-radius:11px;padding:9px 11px;cursor:pointer}
.hamburger span{display:block;width:18px;height:2px;background:var(--text);margin:3px 0;border-radius:2px}
/* ---------- 主导航 ---------- */
.main-nav{border-top:1px solid var(--line);background:rgba(10,26,46,0.6)}
.main-nav ul{display:flex;flex-wrap:wrap;gap:4px;margin:0;padding:0}
.main-nav a{display:block;padding:11px 16px;font-size:14.5px;color:var(--muted);border-bottom:2px solid transparent}
.main-nav a:hover{color:var(--text);background:rgba(255,255,255,.04)}
.main-nav a.is-active{color:var(--amber);border-bottom-color:var(--amber)}
/* ---------- 页面骨架 ---------- */
.shell{padding-top:32px;padding-bottom:72px}
.shell-grid{display:grid;grid-template-columns:260px minmax(0,1fr);gap:34px;align-items:start}
.side-nav{position:sticky;top:132px}
.side-block{margin-bottom:22px}
.side-title{font-size:12.5px;letter-spacing:1.2px;color:var(--muted);margin-bottom:8px}
.side-list a{display:block;padding:8px 10px;font-size:14px;color:var(--muted);border-left:2px solid transparent;border-radius:0 8px 8px 0}
.side-list a:hover{color:var(--text);background:rgba(255,255,255,.04)}
.side-list a.is-current{color:var(--text);border-left-color:var(--amber);background:rgba(255,138,61,.08)}
.side-card{background:var(--glass);border:1px solid var(--line-strong);border-radius:var(--r-md);padding:14px 16px;box-shadow:var(--shadow-soft)}
.side-card p{font-size:13.5px;color:var(--muted);margin-bottom:10px}
.side-cat{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:14px;color:var(--text);padding:8px 0;border-bottom:1px dashed var(--line)}
.side-cat:last-child{border-bottom:0}
.side-cat .arrow{color:var(--amber)}
/* ---------- 分类标题区 ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:14px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--amber)}
.breadcrumb .sep{color:rgba(157,178,198,.5)}
.page-title{font-size:clamp(28px,3.6vw,44px);line-height:1.28;font-weight:700;margin:0 0 14px}
.page-lede{color:var(--muted);font-size:15.5px;max-width:780px}
.ruler{height:9px;margin:22px 0 0;border-bottom:1px solid var(--line);background-image:repeating-linear-gradient(90deg,rgba(255,255,255,.18) 0 1px,transparent 1px 26px)}
.page-head{padding:26px 26px 20px;border-radius:var(--r-lg);border:1px solid var(--line-strong);background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.03));box-shadow:var(--shadow)}
/* ---------- 通用板块 ---------- */
.section{margin-top:52px}
.section-head{margin-bottom:22px;max-width:780px}
.section-tag{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:1.2px;color:var(--amber);margin-bottom:10px}
.section-tag::before{content:"";width:22px;height:1px;background:var(--amber-soft)}
.section-head h2{font-size:clamp(22px,2.4vw,30px)}
.section-head p{color:var(--muted);margin-top:10px}
.glass-card{background:var(--glass);border:1px solid var(--line-strong);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:24px;backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);transition:border-color .25s ease,transform .25s ease,box-shadow .25s ease}
.glass-card:hover{border-color:var(--amber-soft);transform:translateY(-2px)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:12px;font-weight:650;font-size:15px;border:1px solid transparent;cursor:pointer;transition:all .25s ease;line-height:1.4}
.btn-primary{background:var(--amber);color:#1A0E04;box-shadow:0 0 24px var(--amber-glow)}
.btn-primary:hover{box-shadow:0 0 36px var(--amber-glow);transform:translateY(-2px);color:#1A0E04}
.btn-ghost{background:rgba(255,255,255,0.05);border-color:var(--line-strong);color:var(--text)}
.btn-ghost:hover{border-color:var(--amber-soft);color:var(--amber);transform:translateY(-2px)}
.btn-sm{padding:8px 15px;font-size:13.5px;border-radius:10px}
.text-link{color:var(--amber);font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;border-bottom:1px solid rgba(255,138,61,.35);padding-bottom:2px}
.text-link:hover{color:#FFB37A;border-bottom-color:#FFB37A}
/* ---------- 摘要卡 ---------- */
.summary-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:24px}
.key-list li{position:relative;padding:9px 0 9px 24px;color:var(--muted);border-bottom:1px dashed var(--line);font-size:14.5px}
.key-list li:last-child{border-bottom:0}
.key-list li::before{content:"";position:absolute;left:2px;top:18px;width:8px;height:8px;border-radius:50%;background:var(--amber);box-shadow:0 0 12px var(--amber-glow)}
.summary-note{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.chip{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;font-size:12.5px;background:rgba(255,255,255,.06);border:1px solid var(--line-strong);color:var(--muted)}
.chip-amber{color:var(--amber);border-color:var(--amber-soft);background:rgba(255,138,61,.10)}
.chip-cyan{color:var(--cyan);border-color:rgba(76,201,224,.4);background:rgba(76,201,224,.10)}
/* ---------- 筛选栏 ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;padding:16px 18px;border-radius:var(--r-md);border:1px solid var(--line-strong);background:rgba(255,255,255,.045);box-shadow:var(--shadow-soft)}
.filter-bar .label{font-size:13px;color:var(--muted);margin-right:4px}
.filter-chip{padding:8px 16px;border-radius:999px;font-size:13.5px;border:1px solid var(--line-strong);background:rgba(255,255,255,.04);color:var(--muted);cursor:pointer;transition:all .25s ease}
.filter-chip:hover{color:var(--text);border-color:var(--amber-soft)}
.filter-chip.is-on{background:rgba(255,138,61,.16);border-color:var(--amber-soft);color:var(--amber);box-shadow:0 0 18px rgba(255,138,61,.2)}
/* ---------- 文档卡片 ---------- */
.doc-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.doc-card{display:flex;flex-direction:column;background:var(--glass);border:1px solid var(--line-strong);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow);backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);transition:border-color .25s ease,transform .25s ease}
.doc-card:hover{border-color:var(--amber-soft);transform:translateY(-2px)}
.doc-card.is-hidden{display:none}
.doc-thumb{position:relative;aspect-ratio:16/10;overflow:hidden}
.doc-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0}
.doc-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,26,46,.15),rgba(10,26,46,.62))}
.doc-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.doc-body h3{font-size:18px;line-height:1.5}
.doc-body p{color:var(--muted);font-size:14px;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.doc-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:auto;font-size:12.5px;color:var(--muted)}
/* ---------- 查看更多 / 分页 ---------- */
.more-row{margin-top:28px;display:flex;flex-direction:column;align-items:center;gap:18px}
.pager{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.pager a,.pager span{padding:8px 14px;border-radius:10px;font-size:13.5px;border:1px solid var(--line-strong);background:rgba(255,255,255,.04);color:var(--muted)}
.pager a:hover{color:var(--amber);border-color:var(--amber-soft)}
.pager .is-current{color:var(--amber);border-color:var(--amber-soft);background:rgba(255,138,61,.14)}
/* ---------- FAQ ---------- */
.accordion{border:0;background:transparent;margin:0}
.accordion .accordion-item{border:1px solid var(--line-strong);border-radius:var(--r-md);background:var(--glass);margin-bottom:12px;overflow:hidden;transition:background-color .25s ease,border-color .25s ease}
.accordion .accordion-item.is-active{background:rgba(255,255,255,.09);border-color:var(--amber-soft)}
.accordion .accordion-title{border:0;padding:17px 52px 17px 20px;font-size:15.5px;font-weight:600;color:var(--text);background:transparent;position:relative}
.accordion .accordion-title:hover{color:var(--amber);background:rgba(255,255,255,.03)}
.accordion .accordion-title::before{content:"";position:absolute;right:22px;top:50%;width:12px;height:2px;background:var(--amber);transform:translateY(-50%);transition:transform .25s ease}
.accordion .accordion-title::after{content:"";position:absolute;right:27px;top:50%;width:2px;height:12px;background:var(--amber);transform:translateY(-50%);transition:transform .25s ease}
.accordion .is-active>.accordion-title::after{transform:translateY(-50%) rotate(90deg)}
.accordion .accordion-content{border:0;background:transparent;color:var(--muted);padding:0 20px 18px;font-size:14.5px}
.accordion .accordion-content p{margin-bottom:12px}
/* ---------- 相关文章 ---------- */
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.mini-card{background:var(--glass);border:1px solid var(--line-strong);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--shadow-soft);transition:border-color .25s ease,transform .25s ease;display:flex;flex-direction:column}
.mini-card:hover{border-color:var(--amber-soft);transform:translateY(-2px)}
.mini-card img{aspect-ratio:16/10;object-fit:cover;width:100%;border-radius:0}
.mini-body{padding:14px 16px 16px}
.mini-body h3{font-size:15.5px;line-height:1.5;margin-bottom:8px}
.mini-body span{font-size:12.5px;color:var(--muted)}
/* ---------- 订阅条 ---------- */
.subscribe-bar{display:flex;flex-wrap:wrap;align-items:center;gap:18px;justify-content:space-between;padding:24px 26px;border-radius:var(--r-lg);border:1px solid var(--line-strong);background:linear-gradient(120deg,rgba(255,138,61,.12),rgba(255,255,255,.04));box-shadow:var(--shadow)}
.subscribe-bar .copy{max-width:560px}
.subscribe-bar h2{font-size:20px;margin-bottom:6px}
.subscribe-bar p{color:var(--muted);font-size:14px;margin:0}
.subscribe-form{display:flex;gap:10px;flex:1 1 320px;min-width:280px}
.subscribe-form input{flex:1;background:rgba(10,26,46,.5);border:1px solid var(--line-strong);border-radius:12px;padding:12px 14px;color:var(--text);margin:0}
.subscribe-form input:focus{border-color:var(--amber);box-shadow:0 0 0 4px rgba(255,138,61,.18);outline:none}
/* ---------- 移动抽屉 ---------- */
.drawer{display:none}
.drawer.is-open{display:block;position:fixed;inset:0;z-index:90;background:rgba(6,16,28,.92);backdrop-filter:blur(14px);padding:24px 22px;overflow-y:auto}
.drawer-close{position:absolute;top:18px;right:20px;background:rgba(255,255,255,.06);border:1px solid var(--line-strong);border-radius:10px;color:var(--text);padding:6px 12px;cursor:pointer}
.to-top{position:fixed;right:20px;bottom:26px;z-index:70;width:52px;height:52px;border-radius:50%;border:1px solid var(--amber-soft);background:rgba(255,138,61,.16);color:var(--amber);font-size:13px;cursor:pointer;box-shadow:0 0 24px var(--amber-glow);display:flex;align-items:center;justify-content:center;transition:all .25s ease}
.to-top:hover{transform:translateY(-2px);box-shadow:0 0 36px var(--amber-glow)}
/* ---------- 页脚 ---------- */
.site-footer{margin-top:20px;border-top:1px solid var(--line-strong);background:rgba(8,20,36,.86);padding:48px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:30px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.footer-col h4{font-size:15px;margin-bottom:14px;color:var(--text)}
.footer-col p{color:var(--muted);font-size:14px}
.footer-col ul li a{display:block;padding:6px 0;font-size:14px;color:var(--muted)}
.footer-col ul li a:hover{color:var(--amber)}
.footer-copy{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;margin-top:34px;padding-top:18px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .shell-grid{grid-template-columns:1fr}
  .side-nav{display:none}
  .hamburger{display:block}
  .header-search{max-width:280px}
  .summary-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:768px){
  .header-inner{flex-wrap:wrap;gap:12px}
  .header-search{order:4;max-width:none;flex:1 1 100%}
  .header-tools{margin-left:auto}
  .doc-grid{grid-template-columns:1fr}
  .related-grid{grid-template-columns:1fr}
  .filter-bar{gap:8px}
  .page-head{padding:20px 18px 16px}
  .glass-card{padding:20px 18px}
}
@media (max-width:520px){
  .brand-sub{display:none}
  .ghost-select{display:none}
  .subscribe-form{flex-direction:column;min-width:0;width:100%}
  .subscribe-form .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .shell{padding-bottom:48px}
}