/* roulang page: index */
/* ===== 设计变量 ===== */
:root{
  --bg-page:#050A14;
  --bg-deep:#070E1D;
  --bg-soft:#0A1830;
  --primary:#2AD4FF;
  --primary-deep:#0DA2FF;
  --primary-mint:#00F0C2;
  --violet:#6A7BFF;
  --text-main:#F5F9FF;
  --text-secondary:#B6C3E0;
  --text-muted:#7E8DB0;
  --card-bg:rgba(255,255,255,0.065);
  --card-bg-strong:rgba(255,255,255,0.09);
  --line:rgba(255,255,255,0.12);
  --line-soft:rgba(255,255,255,0.08);
  --success:#13E0A4;
  --warning:#FFC25E;
  --danger:#FF6B6B;
  --radius-xl:24px;
  --radius-lg:18px;
  --radius-md:14px;
  --radius-sm:8px;
  --shadow-card:0 8px 24px rgba(3,10,26,0.28);
  --shadow-hover:0 18px 40px rgba(0,120,255,0.18);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:"Barlow Condensed","DIN Alternate",monospace;
  --ease:all .25s cubic-bezier(.23,.8,.32,1);
}
/* ===== 基础 reset ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-sans);
  color:var(--text-main);
  background:
    radial-gradient(1200px 460px at 8% -5%, rgba(10,24,48,.9), rgba(5,10,20,0) 62%),
    radial-gradient(900px 420px at 92% 4%, rgba(0,116,255,.12), rgba(5,10,20,0) 60%),
    linear-gradient(145deg,var(--bg-deep) 0%,var(--bg-page) 48%,var(--bg-deep) 100%);
  line-height:1.75;
  min-height:100vh;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none;transition:var(--ease)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid rgba(42,212,255,.9);outline-offset:3px}
img{max-width:100%;display:block;border:0}
ul,ol{list-style:none}
button{font-family:inherit;appearance:none;border:0;background:none;cursor:pointer}
.grid-container{max-width:72.5rem}
::selection{background:rgba(42,212,255,.25);color:#fff}

/* ===== 顶部导航 ===== */
.site-header{
  position:sticky;top:0;z-index:60;width:100%;
  min-height:78px;
  background:rgba(6,12,26,.72);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line-soft);
  transition:background .3s,box-shadow .3s,border-color .3s;
}
.site-header.is-scrolled{
  background:rgba(4,9,20,.9);
  border-bottom-color:var(--line);
  box-shadow:0 8px 30px rgba(0,0,0,.22);
}
.nav-bar{min-height:78px;gap:.6rem}
.brand-cell{min-width:0}
.brand-logo{
  display:inline-flex;align-items:baseline;gap:.3rem;
  font-size:1.26rem;font-weight:800;letter-spacing:.01em;color:var(--text-main);
}
.brand-logo .logo-mark{width:34px;height:34px;align-self:center;display:inline-flex;align-items:center;justify-content:center;border-radius:11px;background:linear-gradient(135deg,rgba(13,162,255,.22),rgba(0,240,194,.16));border:1px solid rgba(42,212,255,.38);color:var(--primary);flex:none}
.global-nav{margin-left:auto}
.nav-center{display:flex;align-items:center;justify-content:center;gap:2rem}
.nav-center a{position:relative;padding:.5rem .1rem;font-size:.93rem;color:var(--text-secondary);font-weight:500;white-space:nowrap}
.nav-center a::after{content:"";position:absolute;left:0;bottom:-4px;width:0;height:2px;border-radius:4px;background:linear-gradient(90deg,var(--primary),var(--primary-mint));transition:width .25s}
.nav-center a:hover,.nav-center a.active{color:var(--text-main)}
.nav-center a:hover::after,.nav-center a.active::after{width:100%}
.nav-center a.active{color:var(--primary)}
.header-cta{display:flex;align-items:center;gap:1rem}
.ui-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.66rem 1.2rem;border-radius:10px;font-weight:600;font-size:.9rem;
  background:var(--card-bg);border:1px solid rgba(255,255,255,.16);
  color:var(--text-main);line-height:1;transition:var(--ease);
}
.ui-btn i{font-size:.82rem;transition:transform .2s}
.ui-btn:hover{transform:translateY(-1px);border-color:rgba(42,212,255,.5);background:rgba(255,255,255,.09)}
.ui-btn-glow{background:linear-gradient(135deg,var(--primary-deep),var(--primary-mint));border:0;box-shadow:0 0 18px rgba(0,200,255,.32);color:#00121c}
.ui-btn-glow:hover{border:0;box-shadow:0 0 40px rgba(0,220,255,.44);background:linear-gradient(135deg,var(--primary-deep),var(--primary-mint));transform:translateY(-2px)}
.ui-btn-secondary{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.42)}
.ui-btn-secondary:hover{border-color:var(--primary);background:rgba(42,212,255,.08)}
.ui-btn-sm{padding:.5rem .85rem;font-size:.84rem;border-radius:8px}
.menu-toggle{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  background:rgba(255,255,255,.04);color:var(--text-main);align-items:center;justify-content:center;
  transition:var(--ease)
}
.menu-toggle:hover{color:var(--primary);border-color:rgba(42,212,255,.45)}
/* 移动端导航 */
.mobile-overlay{position:fixed;inset:0;background:rgba(3,7,15,.72);backdrop-filter:blur(4px);z-index:70;opacity:0;visibility:hidden;transition:var(--ease)}
.mobile-overlay.is-open{opacity:1;visibility:visible}
.mobile-menu{
  position:fixed;top:0;right:0;bottom:0;width:min(86vw,360px);z-index:80;padding:24px 22px;background:linear-gradient(160deg,#0C1830,#060D1C);border-left:1px solid var(--line);
  transform:translateX(102%);visibility:hidden;transition:transform .32s cubic-bezier(.22,.75,.35,1),visibility .32s;display:flex;flex-direction:column;gap:22px;
}
.mobile-menu.is-open{transform:translateX(0);visibility:visible}
.mobile-top{display:flex;align-items:center;justify-content:space-between}
.mobile-menu .mobile-caption{color:var(--text-muted);font-size:.76rem;letter-spacing:.06em;text-transform:uppercase;border-bottom:1px solid var(--line-soft);padding-bottom:8px;margin-bottom:4px}
.mobile-link{display:block;padding:.68rem .5rem;border-radius:10px;color:var(--text-secondary);font-size:1.02rem;transition:var(--ease)}
.mobile-link:hover{background:rgba(255,255,255,.06);color:#fff;transform:translateX(4px)}
.mobile-link.active{background:rgba(42,212,255,.1);color:var(--primary)}
.menu-close{
  width:36px;height:36px;display:flex;align-items:center;justify-content:center;border:1px solid var(--line);background:rgba(255,255,255,.04);border-radius:10px;color:#fff;
}

/* ===== 通用板块 ===== */
.section{padding-top:104px;padding-bottom:104px;position:relative}
.section-alt{background:linear-gradient(180deg,rgba(10,24,48,.28),rgba(9,18,38,.32));border-top:1px solid transparent}
.section-border{border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.container-narrow{max-width:780px}
.section-eyebrow{
  display:inline-flex;align-items:center;gap:.5rem;font-size:.76rem;letter-spacing:.1em;color:var(--primary);text-transform:uppercase;background:rgba(42,212,255,.08);border:1px solid rgba(42,212,255,.18);border-radius:999px;padding:.22rem .75rem;margin-bottom:14px;
}
.sec-title{font-size:clamp(1.8rem,3.2vw,2.35rem);line-height:1.3;font-weight:700;color:var(--text-main);letter-spacing:.01em}
.sec-desc{color:var(--text-secondary);font-size:1rem;line-height:1.85;max-width:720px}
/* 文字链接 */
.text-link{display:inline-flex;align-items:center;gap:.35rem;color:var(--primary);font-weight:600;font-size:.91rem;transform:translateZ(0)} 
.text-link i{transition:transform .22s}
.text-link:hover{color:var(--primary-mint)}
.text-link:hover i{transform:translateX(4px)}

/* ===== Hero ===== */
.hero{
  position:relative;min-height:90vh;display:flex;align-items:center;padding:88px 0 94px;background-size:cover;background-position:center;overflow:hidden;
}
.hero-overlay{position:absolute;inset:0;z-index:1;background:linear-gradient(90deg,rgba(5,10,20,.94) 3%,rgba(7,16,34,.6) 62%,rgba(7,16,34,.8)),radial-gradient(800px 350px at 86% 18%,rgba(42,212,255,.14),rgba(0,0,0,0) 70%)}
.hero-content{position:relative;z-index:3}
.hero-copy{padding-right:18px}
.hero-eyebrow{
  display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.05);border:1px solid rgba(42,212,255,.25);color:var(--primary);border-radius:999px;width:max-content;padding:.3rem .9rem;font-size:.78rem;letter-spacing:.1em;backdrop-filter:blur(8px);margin-bottom:24px;
}
.hero-eyebrow i{font-size:.66rem;animation:pulseDot 1.8s infinite}
@keyframes pulseDot{0%,100%{opacity:.5}50%{opacity:1}}
.hero-title{font-size:clamp(2.4rem,5vw,3.6rem);line-height:1.16;font-weight:800;color:#fff;letter-spacing:.015em;margin-bottom:18px;text-shadow:0 4px 24px rgba(0,0,0,.26)}
.hero-title span{background:linear-gradient(100deg,#8FE9FF,#2AD4FF 44%,#00F0C2);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-subtitle{font-size:1.06rem;line-height:2;color:#C8D6F0;max-width:620px;margin-bottom:32px}
.hero-actions{display:flex;flex-wrap:wrap;gap:1rem}
.hero-note{margin-top:24px;display:flex;align-items:center;gap:.45rem;color:var(--text-muted);font-size:.82rem}
/* 玻璃面板 */
.hero-panel{
  position:relative;padding:28px 24px 24px;border-radius:var(--radius-xl);background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);backdrop-filter:blur(18px);box-shadow:0 14px 44px rgba(0,0,0,.2);;
}
.hero-panel::before{content:"";position:absolute;inset:-1px;border-radius:inherit;padding:1px;background:linear-gradient(145deg,rgba(42,212,255,.6),transparent 38%,transparent 62%,rgba(255,255,255,.08));-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none}
.panel-title{font-size:.76rem;color:#E8F0FF;letter-spacing:.08em;text-transform:uppercase;display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.panel-title i{color:var(--primary)}
.panel-status{font-size:.76rem;color:var(--success);display:flex;align-items:center;gap:.4rem}
.panel-status i{font-size:.6rem}
.hero-quick-list{display:flex;flex-direction:column;gap:10px}
.panel-quick{display:flex;align-items:center;gap:10px;padding:.7rem .8rem;border-radius:12px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.07);color:var(--text-secondary);font-size:.87rem;transition:var(--ease)}
.hero-quick-list a.panel-quick:hover{background:rgba(42,212,255,.08);border-color:rgba(42,212,255,.42);color:#fff;transform:translateX(4px)}
.panel-quick .quick-ico{width:14px;color:var(--primary);text-align:center}
.panel-line{height:1px;background:linear-gradient(90deg,rgba(255,255,255,.04),rgba(255,255,255,.14),rgba(255,255,255,0));margin:18px 0}
.panel-foot{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.panel-mini{border-radius:10px;background:rgba(255,255,255,.035);border:1px solid rgba(255,255,255,.07);padding:.55rem .7rem}
.panel-mini b{display:block;font-size:.9rem;color:#fff}
.panel-mini span{color:var(--text-muted);font-size:.72rem}

/* ===== 功能分区模块 ===== */
.feature-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:40px}
@media(max-width:63.9375em){.feature-wrap{grid-template-columns:1fr}.feature-intro{margin-right:0}}
.feature-intro .sec-desc{margin:18px 0 26px}
.func-topics{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.func-card{
  position:relative;background:var(--card-bg);border:1px solid var(--line-soft);border-radius:var(--radius-lg);padding:24px 22px;box-shadow:var(--shadow-card);backdrop-filter:blur(12px);transition:transform .25s,box-shadow .25s,border-color .25s;overflow:hidden;
}
.func-card::after{content:"";position:absolute;top:0;left:0;width:42%;height:1px;background:linear-gradient(90deg,transparent,rgba(42,212,255,.45),transparent)}
.func-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:rgba(42,212,255,.35)}
.func-card-ico{width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;background:linear-gradient(145deg,rgba(42,212,255,.13),rgba(106,123,255,.12));color:var(--primary);border:1px solid rgba(106,123,255,.2);font-size:1.1rem;margin-bottom:16px}
.func-card h3{font-size:1.08rem;font-weight:650;color:#fff;margin-bottom:7px}
.func-card p{color:var(--text-secondary);font-size:.86rem;line-height:1.8;margin-bottom:15px}
.func-number{position:absolute;right:14px;top:10px;font-family:var(--font-mono);color:rgba(255,255,255,.08);font-size:2rem;font-weight:700}
.feature-media{padding:20px 0}
.media-photo{position:relative;border-radius:var(--radius-xl);overflow:hidden;border:1px solid var(--line);box-shadow:0 22px 46px rgba(0,0,0,.18);background:#081120}
.media-photo img{width:100%;height:300px;object-fit:cover}
.media-photo::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 52%,rgba(5,10,20,.66));pointer-events:none}
.media-caption{position:absolute;left:18px;right:18px;bottom:16px;z-index:2;color:#EAF3FF;font-size:.92rem;display:flex;align-items:center;gap:.55rem}
.media-caption i{color:var(--primary)}
.media-links{display:flex;gap:1rem;margin-top:18px;flex-wrap:wrap}

/* ===== 访问场景 / 步骤 ===== */
.scene-wrap{position:relative}
.steps-col .scene-intro{margin-bottom:34px}
.step-list{display:grid;gap:18px}
.step-item{
  background:rgba(255,255,255,.045);border:1px solid var(--line-soft);border-left:3px solid var(--primary);border-radius:calc(var(--radius-lg) - 4px);padding:18px 20px;display:grid;grid-template-columns:52px 1fr;gap:14px;align-items:start;transition:var(--ease);
}
.step-item:hover{background:rgba(42,212,255,.055);border-left-color:var(--primary-mint);transform:translateX(4px)}
.step-num{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;border:1px solid rgba(42,212,255,.28);background:rgba(42,212,255,.08);color:var(--primary);font-weight:800;font-size:1rem;box-shadow:0 0 10px rgba(42,212,255,.04)}
.step-body h4{color:#fff;font-size:1.02rem;margin-bottom:6px}
.step-body p{color:var(--text-secondary);font-size:.88rem;line-height:1.75}
.scene-preview{background:rgba(255,255,255,.04);border:1px solid var(--line-soft);border-radius:var(--radius-xl);overflow:hidden;box-shadow:var(--shadow-card)}
.scene-preview img{width:100%;height:290px;object-fit:cover}
.scene-preview .preview-pad{padding:20px 24px;display:flex;align-items:center;gap:12px}
.preview-line{flex:1;height:1px;background:var(--line-soft)}
.scene-slider{margin-top:36px;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.mini-cover{position:relative;border-radius:14px;overflow:hidden;aspect-ratio:16/10;background:#0a1826;border:1px solid var(--line);transition:var(--ease)}
.mini-cover img{width:100%;height:100%;object-fit:cover;transition:transform .45s}
.mini-cover:hover img{transform:scale(1.05)}
.mini-cover:hover{box-shadow:var(--shadow-hover);border-color:rgba(42,212,255,.25)}
.mini-cover-tag{position:absolute;left:10px;top:10px;z-index:3;background:rgba(4,9,20,.72);backdrop-filter:blur(8px);color:#A9EAFF;border:1px solid rgba(42,212,255,.22);border-radius:999px;font-size:.7rem;padding:.18rem .62rem}
/* 数据带 */
.band-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stat-card{background:var(--card-bg);border:1px solid var(--line-soft);border-radius:var(--radius-lg);padding:26px 22px;position:relative;overflow:hidden}
.stat-card::after{content:"";position:absolute;right:-30px;top:-30px;width:90px;height:90px;background:radial-gradient(circle,rgba(42,212,255,.15),transparent 70%)}
.stat-num{font-size:clamp(1.7rem,3vw,2.4rem);font-weight:800;color:var(--primary);font-family:var(--font-mono);letter-spacing:.02em;line-height:1.2}
.stat-num small{font-size:.85rem;color:var(--text-secondary);font-weight:400;font-family:var(--font-sans)}
.stat-tag{display:inline-block;color:var(--text-secondary);font-size:.82rem;margin-top:8px;border-left:1px solid var(--violet);padding-left:10px}
.stat-note{
  display:flex;gap:20px;margin-top:34px;padding:22px 26px;border-radius:var(--radius-lg);
  background:linear-gradient(135deg,rgba(255,194,94,.08),rgba(255,194,94,.02));border:1px solid rgba(255,194,94,.3);color:#F0D5A8;
}
.note-ico{color:var(--warning);font-size:1.25rem;line-height:1}
.stat-note p{color:#EAD7BB;font-size:.9rem;line-height:1.8}
/* ===== 资讯列表 ===== */
.news-section{background:rgba(255,255,255,.018);border-top:1px solid var(--line-soft);border-bottom:1px solid rgba(255,255,255,.025)}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;flex-wrap:wrap;gap:22px;margin-bottom:34px}
.news-grid{gap:22px}
.news-list-col{display:flex}
.news-card{
  width:100%;background:var(--card-bg);border:1px solid var(--line-soft);border-radius:var(--radius-lg);padding:24px 24px 20px;box-shadow:var(--shadow-card);position:relative;overflow:hidden;display:flex;flex-direction:column;transition:var(--ease);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(42,212,255,.22)}
.news-top{display:flex;align-items:center;gap:.6rem;margin-bottom:14px;flex-wrap:wrap}
.badge-cat{display:inline-flex;background:rgba(106,123,255,.13);border:1px solid rgba(106,123,255,.2);color:#BFD1FF;padding:.18rem .66rem;border-radius:999px;font-size:.73rem;letter-spacing:.05em}
.news-arrow{color:var(--text-muted);margin-left:auto;font-size:.78rem}
.news-card .news-title{font-size:1.02rem;font-weight:650;color:#fff;margin-bottom:8px;transition:color .2s;line-height:1.5}
.news-card .news-title a:hover{color:var(--primary)}
.news-card .news-exerpt{color:var(--text-secondary);font-size:.88rem;margin-bottom:16px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;padding-top:12px;border-top:1px solid rgba(255,255,255,.06);color:var(--text-muted)}
.news-date{display:inline-flex;align-items:center;gap:.42rem;font-size:.8rem}
.news-date i{color:var(--violet)}
.empty-box{
  display:flex;align-items:center;gap:18px;background:rgba(255,255,255,.04);border:1px dashed var(--line);border-radius:var(--radius-lg);padding:26px 28px;
}
.empty-ico{width:52px;height:52px;flex:none;border-radius:16px;background:rgba(42,212,255,.08);border:1px solid rgba(42,212,255,.22);display:flex;align-items:center;justify-content:center;color:var(--primary);font-size:1.25rem}
.empty-box h3{color:#fff;font-size:1.04rem;margin-bottom:6px}
.empty-box p{color:var(--text-secondary);font-size:.89rem}

/* ===== 服务模式 / 档位说明 ===== */
.mode-wrap{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;align-items:stretch}
.mode-card{
  background:rgba(255,255,255,.04);border:1px solid var(--line-soft);border-radius:var(--radius-xl);padding:34px 30px 30px;position:relative;transition:var(--ease);
}
.mode-card.featured{background:linear-gradient(145deg,rgba(13,162,255,.07),rgba(42,212,255,.02));border-color:rgba(42,212,255,.3);box-shadow:var(--shadow-card)}
.mode-card:hover{transform:translateY(-4px);border-color:rgba(42,212,255,.4)}
.mode-tag{display:inline-block;font-size:.75rem;background:rgba(42,212,255,.08);color:var(--primary);border:1px solid rgba(42,212,255,.18);border-radius:999px;padding:.18rem .7rem;margin-bottom:16px}
.mode-card h3{color:#fff;font-size:1.3rem;font-weight:700;margin-bottom:10px}
.mode-card .mode-desc{color:var(--text-secondary);line-height:1.8;font-size:.9rem;margin-bottom:20px}
.mode-list{display:flex;flex-direction:column;gap:.5rem}
.mode-list li{display:flex;gap:.6rem;color:#C5D1E9;font-size:.9rem;align-items:center;line-height:1.7}
.mode-list i{color:var(--success);font-size:.58rem}
.mode-meta{margin-top:20px;padding-top:12px;border-top:1px solid var(--line-soft);color:var(--text-muted);font-size:.8rem}
/* ===== FAQ ===== */
.faq-section{background:rgba(5,10,20,.2)}
.faq-list{max-width:920px}
.faq-item{
  background:rgba(255,255,255,.045);border:1px solid var(--line-soft);border-left:3px solid var(--primary);border-radius:calc(var(--radius-lg) - 3px);margin-bottom:14px;overflow:hidden;transition:var(--ease)
}
.faq-item:hover{border-color:rgba(42,212,255,.36)}
.faq-item.open{border-left-color:var(--primary-mint);background:rgba(255,255,255,.06)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:18px 22px;color:#EAF2FF;font-size:.97rem;font-weight:600;text-align:left;
}
.faq-q:hover{color:var(--primary)}
.faq-q .faq-arrow{width:27px;height:27px;flex:none;position:relative;border-radius:50%;background:rgba(42,212,255,.07);border:1px solid rgba(42,212,255,.14);color:var(--primary);display:flex;align-items:center;justify-content:center;transition:transform .25s;font-size:.8rem;font-style:normal}
.faq-item.open .faq-arrow{transform:rotate(45deg);border-color:var(--primary);color:var(--primary)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease,padding .3s ease}
.faq-a-inner{padding:0 22px 18px;color:var(--text-secondary);font-size:.91rem;line-height:1.9}
.faq-a-inner p{margin-bottom:.8rem}.faq-a-inner p:last-child{margin-bottom:0}
.faq-help{margin-top:20px;display:flex;align-items:center;gap:.5rem;font-size:.87rem;color:var(--text-secondary)}
.faq-help a{color:var(--primary)}
.faq-help a:hover{color:var(--primary-mint)}

/* ===== 页脚CTA ===== */
.final-cta{padding:76px 0 110px}
.cta-box{
  position:relative;background-image:url('/assets/images/backpic/back-2.webp');background-size:cover;background-position:center;border-radius:26px;overflow:hidden;padding:52px 42px;text-align:center;border:1px solid rgba(255,255,255,.12);box-shadow:0 12px 44px rgba(0,0,0,.2);
}
.cta-caption{font-size:.78rem;letter-spacing:.1em;color:var(--primary);margin-bottom:12px}
.cta-box h2{position:relative;z-index:2;font-size:clamp(1.5rem,3vw,2rem);color:#fff;max-width:760px;margin:0 auto 12px}
.cta-box p{position:relative;z-index:2;color:#D0DEF3;font-size:.97rem;margin-bottom:24px}
.cta-actions{position:relative;z-index:2}

/* ===== 页脚 ===== */
.footer{background:#050A16;border-top:1px solid rgba(255,255,255,.07);padding:64px 0 0;position:relative}
.footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(42,212,255,.16),transparent)}
.footer-grid{display:grid;grid-template-columns:1.5fr .9fr 1fr 1fr;gap:32px;padding-bottom:52px}
.footer-brand .brand-logo{margin-bottom:16px}
.footer-desc{color:var(--text-muted);font-size:.9rem;line-height:1.9;max-width:360px}
.footer h4{font-size:.97rem;color:#E8F0FF;margin-bottom:18px;letter-spacing:.04em}
.footer-col ul li{margin-bottom:9px}
.footer-col ul a{color:var(--text-secondary);font-size:.87rem;display:inline-flex;align-items:center;gap:.5rem;transition:var(--ease)}
.footer-col ul a:hover{color:var(--primary);transform:translateX(3px)}
.footer-dyn span{display:block;color:var(--text-muted);font-size:.82rem;line-height:1.8;margin-bottom:12px}
.footer-bottom{border-top:1px solid var(--line-soft);display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;padding:20px 0 24px;color:var(--text-muted);font-size:.82rem}
.copyright-line b{color:#B9CCEE;font-weight:500}
/* 返回顶部 */
.to-top{
  position:fixed;right:22px;bottom:22px;z-index:55;width:44px;height:44px;display:flex;align-items:center;justify-content:center;border-radius:13px;background:rgba(6,14,29,.8);border:1px solid rgba(42,212,255,.3);color:var(--primary);backdrop-filter:blur(8px);box-shadow:0 4px 18px rgba(0,0,0,.24);opacity:1;transition:var(--ease)
}
.to-top:hover{background:rgba(42,212,255,.14);border-color:var(--primary);transform:translateY(-3px)}
/* 背景辅助光 */
.bg-glow{position:absolute;width:300px;height:300px;border-radius:50%;filter:blur(90px);pointer-events:none;z-index:0}
/* ===== 响应式 ===== */
@media screen and (max-width:75em){
  .global-nav{display:none}
  .menu-toggle{display:inline-flex}
  .section{padding-top:72px;padding-bottom:72px}
  .stats-band{border-left:0}
}
@media screen and (max-width:48em){
  body{font-size:.96rem}
  .section{padding-top:54px;padding-bottom:54px}
  .nav-bar{min-height:64px}
  .site-header,.nav-bar{min-height:64px}
  .brand-logo{font-size:1.08rem}
  .brand-logo .logo-mark{width:30px;height:30px;font-size:.82rem}
  .header-actions .ui-btn-header-cta{display:none}
  .hero{padding:58px 0 70px;min-height:auto}
  .hero-title{font-size:clamp(2rem,7vw,2.75rem)}
  .hero-panel{margin-top:20px}
  .func-topics,.grid-x,.band-stats,.mode-wrap,.scene-slider{grid-template-columns:1fr}
  .band-stats{grid-template-columns:1fr 1fr}
  .func-card{padding:20px 18px}
  .section-head{align-items:flex-start;flex-direction:column}
  .scene-preview img{height:220px}
  .cta-box{padding:36px 18px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
  .mobile-menu{width:min(88vw,340px)}
  .news-top,.news-card-foot{flex-wrap:wrap}
}
@media screen and (max-width:39.9375em){
  .band-stats{grid-template-columns:1fr;gap:12px}
  .footer-grid,.mode-wrap{grid-template-columns:1fr}
  .hero-subtitle{line-height:1.9;font-size:.95rem}
  .ui-btn-glow,.ui-btn-secondary{width:100%}.hero-actions{width:100%}.hero-actions>.ui-btn{justify-content:center}
  .func-topics{grid-template-columns:1fr;gap:12px}
  .scene-slider{display:block}
  .mini-cover{width:78vw;max-width:86%;appearance:none;aspect-ratio:16/10;margin-right:10px;display:inline-block}
  .empty-box{flex-direction:column;text-align:center;align-items:flex-start}
}

/* roulang page: article */
:root {
  --bg-deep: #050a14;
  --bg-elev: #070e1d;
  --bg-soft: #0a1830;
  --panel: rgba(255,255,255,.06);
  --panel-strong: rgba(255,255,255,.09);
  --line: rgba(255,255,255,.12);
  --line-bright: rgba(255,255,255,.22);
  --text-hi: #f5f9ff;
  --text-mid: #b6c3e0;
  --text-muted: #7e8db0;
  --cyan: #2ad4ff;
  --blue: #0da2ff;
  --green: #13e0a4;
  --indigo: #6a7bff;
  --amber: #ffc25e;
  --red: #ff6b6b;
  --grad-main: linear-gradient(135deg, #0da2ff, #00f0c2);
  --grad-dark: linear-gradient(145deg, rgba(255,255,255,.10), rgba(255,255,255,.04));
  --radius-xl: 24px;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 24px rgba(3,10,26,.24);
  --shadow-hover: 0 18px 40px rgba(0,120,255,.18);
  --shadow-glow: 0 0 18px rgba(0,200,255,.35);
  --font-sans: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  color: var(--text-hi);
  background:
    radial-gradient(circle at 14% -10%, rgba(18,77,135,.42), transparent 38%),
    radial-gradient(circle at 90% 12%, rgba(0,140,255,.14), transparent 30%),
    linear-gradient(180deg, #070e1d 0%, #060b18 55%, #050a14 100%);
  min-height: 100vh;
  line-height: 1.68;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.018) 1px, transparent 1px);
  background-size: 48px 48px;
  z-index: -1;
  pointer-events: none;
}
a { color: var(--cyan); text-decoration: none; transition: color .2s ease, border-color .2s ease, background .2s ease; }
a:hover { color: #ffffff; }
img { max-width: 100%; display: block; border: 0; }
ul, ol, li { list-style: none; }
button { font-family: inherit; }
table { border-collapse: collapse; }

::selection { background: rgba(42,212,255,.24); color: #fff; }
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}
.skip-link {
  position: absolute;
  left: -999px;
  top: 12px;
  z-index: 200;
  background: var(--cyan);
  color: #06121c;
  font-weight: 700;
  padding: .65rem 1.2rem;
  border-radius: 12px;
}
.skip-link:focus { left: 12px; }

.grid-container {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}
.grid-margin-x { margin-left: -.75rem; margin-right: -.75rem; }
.grid-margin-x > .cell { padding-left: .75rem; padding-right: .75rem; }

/* ============ 顶部导航 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(5,10,21,.68);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  transition: box-shadow .25s ease, background .25s ease;
}
.site-header.stuck {
  background: rgba(4,8,18,.88);
  box-shadow: 0 10px 30px rgba(0,4,14,.22);
}
.nav-row {
  display: flex;
  align-items: center;
  gap: .85rem;
  min-height: 78px;
}
.brand-zone { display: flex; align-items: center; flex-shrink: 0; }
.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: .01em;
  color: var(--text-hi);
  white-space: nowrap;
}
.brand-logo:hover { color: #fff; }
.logo-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--grad-main);
  color: #06121c;
  font-size: 1.02rem;
  box-shadow: 0 0 16px rgba(0,200,255,.32);
}
.global-nav { flex: 1; display: flex; justify-content: center; min-width: 0; }
.nav-center {
  display: inline-flex;
  align-items: center;
  gap: .25rem;
  padding: .28rem;
  background: rgba(255,255,255,.045);
  border: 1px solid rgba(255,255,255,.07);
  border-radius: var(--radius-pill);
}
.nav-center a {
  display: inline-block;
  padding: .46rem .95rem;
  border-radius: var(--radius-pill);
  font-size: .91rem;
  font-weight: 500;
  color: #c9d4ea;
  white-space: nowrap;
  transition: all .2s ease;
}
.nav-center a:hover {
  color: #fff;
  background: rgba(255,255,255,.09);
  transform: translateY(-1px);
}
.nav-center a.active,
.nav-center a[aria-current="page"] {
  color: #06121c;
  background: linear-gradient(135deg, #80eaff, var(--cyan));
  box-shadow: 0 4px 16px rgba(42,212,255,.24);
}
.header-access { display: flex; align-items: center; flex-shrink: 0; }
.nav-toggle {
  display: none;
  appearance: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 12px;
  cursor: pointer;
  flex-shrink: 0;
}
.nav-toggle-line { display: block; width: 18px; height: 2px; border-radius: 2px; background: #f2f6ff; transition: transform .2s ease, opacity .2s ease; }
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.mobile-nav {
  display: none;
  background: rgba(4,8,18,.98);
  border-top: 1px solid rgba(255,255,255,.07);
  padding: 1rem 1.25rem 1.5rem;
}
.mobile-nav.is-open { display: block; }
.mobile-nav a {
  display: block;
  padding: .8rem 1rem;
  border-radius: 14px;
  color: #d5dff2;
  font-weight: 500;
  background: rgba(255,255,255,.035);
  margin-bottom: .45rem;
}
.mobile-nav a:hover { color: #fff; background: rgba(42,212,255,.1); }
.mobile-nav .btn { margin-top: .5rem; }

@media (max-width: 48em) {
  .global-nav { display: none; }
  .nav-toggle { display: inline-flex; }
  .nav-row { min-height: 68px; }
  .brand-logo { font-size: 1.08rem; }
  .logo-mark { width: 34px; height: 34px; border-radius: 10px; }
}

/* ============ 按钮与标签 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  appearance: none;
  border: 1px solid transparent;
  border-radius: 12px;
  padding: .72rem 1.35rem;
  font-size: .92rem;
  font-weight: 600;
  line-height: 1;
  color: var(--text-hi);
  background: transparent;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: var(--grad-main);
  color: #06121c;
  box-shadow: 0 0 18px rgba(0,200,255,.26), 0 8px 20px rgba(0,120,255,.15);
}
.btn-primary:hover { color: #031020; box-shadow: 0 0 30px rgba(0,200,255,.38), 0 12px 28px rgba(0,120,255,.18); }
.btn-ghost {
  background: rgba(255,255,255,.05);
  border-color: rgba(255,255,255,.18);
  color: #eaf2ff;
}
.btn-ghost:hover { border-color: rgba(42,212,255,.55); color: #fff; }
.btn-sm { padding: .5rem 1rem; border-radius: 10px; font-size: .84rem; }
.btn-block { width: 100%; text-align: center; }
.btn:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .36rem .85rem;
  border-radius: var(--radius-pill);
  font-size: .78rem;
  font-weight: 500;
  color: var(--text-mid);
  background: rgba(255,255,255,.055);
  border: 1px solid rgba(255,255,255,.13);
  white-space: nowrap;
}
.badge-category { color: var(--cyan); background: rgba(42,212,255,.09); border-color: rgba(42,212,255,.24); }
.badge-main { color: #dff1ff; background: rgba(109,123,255,.13); border-color: rgba(109,123,255,.24); }

/* ============ 面包屑 ============ */
.breadcrumb-section {
  padding: 1.05rem 0 .7rem;
  border-bottom: 1px solid rgba(255,255,255,.06);
  background: rgba(7,14,29,.7);
  backdrop-filter: blur(10px);
}
.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: .55rem;
  flex-wrap: wrap;
  font-size: .88rem;
  color: var(--text-muted);
}
.breadcrumb-nav a { color: #9fb0d0; display: inline-flex; align-items: center; gap: .3rem; }
.breadcrumb-nav a:hover { color: var(--cyan); }
.bc-sep { opacity: .48; font-size: .7rem; }
.bc-label {
  color: #b9c8e3;
  background: rgba(255,255,255,.05);
  padding: .24rem .7rem;
  border-radius: 999px;
  font-size: .84rem;
}
.bc-current {
  color: var(--text-hi);
  background: rgba(255,255,255,.075);
  border: 1px solid rgba(255,255,255,.12);
  padding: .26rem .8rem;
  border-radius: 999px;
  font-weight: 500;
  max-width: 420px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ============ 文章页 ============ */
.article-main {
  padding: 2.6rem 0 4.5rem;
  position: relative;
}
.article-width { max-width: 960px; }
.article-panel {
  position: relative;
  background: var(--grad-dark);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 28px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  padding: clamp(1.35rem, 4vw, 3.2rem);
  overflow: hidden;
}
.article-panel::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(42,212,255,.34), transparent);
}
.article-head { max-width: 820px; }
.article-title {
  margin: 1rem 0 .8rem;
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.32;
  color: #fff;
  letter-spacing: .01em;
  scroll-margin-top: 110px;
}
.article-meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .7rem 1.1rem;
  color: var(--text-muted);
  font-size: .88rem;
}
.meta-cat { color: var(--cyan); }
.article-cover {
  margin: 2.2rem auto 0;
  max-width: 860px;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.1);
  box-shadow: 0 20px 45px rgba(0,0,0,.22);
  background: rgba(255,255,255,.02);
}
.article-cover img { width: 100%; height: auto; aspect-ratio: 16 / 7.6; object-fit: cover; }
.article-content {
  max-width: 780px;
  margin: 2.6rem auto 0;
  color: #e6ecf8;
  font-size: clamp(1rem, .3vw + .94rem, 1.1rem);
  line-height: 1.94;
}
.article-content p { margin: 1rem 0; }
.article-content h2,
.article-content h3,
.article-content h4 {
  color: #fff;
  line-height: 1.4;
  margin-top: 2.6rem;
  margin-bottom: 1rem;
  font-weight: 650;
}
.article-content h2 { font-size: 1.5rem; padding-left: .85rem; border-left: 3px solid var(--cyan); }
.article-content h3 { font-size: 1.18rem; }
.article-content a { color: var(--cyan); text-decoration: underline; text-decoration-color: rgba(42,212,255,.35); text-underline-offset: 5px; }
.article-content a:hover { color: #8ff0ff; text-decoration-color: #8ff0ff; }
.article-content ul { list-style: none; margin: 1rem 0; padding: 0; }
.article-content ul li { position: relative; padding-left: 1.45rem; margin: .55rem 0; }
.article-content ul li::before {
  content: "";
  position: absolute;
  left: .2rem;
  top: .68rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px rgba(42,212,255,.35);
}
.article-content ol { margin: 1rem 0; padding-left: 1.4rem; }
.article-content ol li { list-style: decimal; margin: .45rem 0; padding-left: .25rem; }
.article-content blockquote {
  background: rgba(109,123,255,.08);
  border-left: 3px solid var(--indigo);
  padding: 1rem 1.4rem;
  border-radius: 0 14px 14px 0;
  color: #cfdcf5;
  margin: 1.6rem 0;
}
.article-content pre,
.article-content code {
  font-family: "SF Mono", ui-monospace, Consolas, monospace;
}
.article-content code {
  background: rgba(42,212,255,.11);
  border: 1px solid rgba(42,212,255,.16);
  padding: .15rem .45rem;
  border-radius: 6px;
  font-size: .9em;
  color: #bff4ff;
}
.article-content pre {
  background: rgba(2,8,18,.85);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 16px;
  padding: 1.2rem 1.3rem;
  overflow-x: auto;
  line-height: 1.7;
}
.article-content pre code { background: transparent; border: 0; padding: 0; color: #d9ecff; font-size: .92em; }
.article-content img { border-radius: 16px; margin: 1.6rem auto; border: 1px solid rgba(255,255,255,.08); }
.article-content figure { margin: 1.5rem 0; }
.article-content figcaption { color: var(--text-muted); font-size: .86rem; text-align: center; margin-top: .6rem; }
.article-content table { width: 100%; border: 1px solid rgba(255,255,255,.12); border-radius: 14px; overflow: hidden; margin: 1.6rem 0; }
.article-content th { background: rgba(109,123,255,.14); color: #fff; padding: .7rem .9rem; font-weight: 600; font-size: .9rem; }
.article-content td { border-top: 1px solid rgba(255,255,255,.08); padding: .68rem .9rem; font-size: .92rem; color: #dbe7fb; }

.article-tags {
  max-width: 780px;
  margin: 2.5rem auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
}
.article-footbar {
  max-width: 780px;
  margin: 1.8rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,.1);
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  justify-content: space-between;
}

/* ============ 相关分类推荐 ============ */
.related-zone {
  padding: 3.2rem 0 1.2rem;
}
.section-kicker {
  display: inline-flex;
  align-items: center;
  letter-spacing: .1em;
  font-weight: 700;
  font-size: .76rem;
  color: var(--cyan);
  text-transform: uppercase;
}
.section-head {
  margin-bottom: 1.8rem;
}
.section-head h2 {
  margin-top: .25rem;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
}
.related-card {
  height: 100%;
  background: linear-gradient(160deg, rgba(255,255,255,.09), rgba(255,255,255,.035));
  border: 1px solid rgba(255,255,255,.11);
  border-radius: 22px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform .24s ease, box-shadow .24s ease, border-color .24s ease;
  display: flex;
  flex-direction: column;
}
.related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: rgba(42,212,255,.34); }
.related-cover { overflow: hidden; aspect-ratio: 16 / 8; background: rgba(0,0,0,.2); }
.related-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.related-card:hover .related-cover img { transform: scale(1.045); }
.related-body { padding: 1.25rem 1.35rem 1.4rem; flex: 1; }
.related-body h3 { font-size: 1.08rem; font-weight: 600; color: #fff; margin: .55rem 0 .55rem; }
.related-body p { color: var(--text-mid); font-size: .9rem; line-height: 1.7; }
.text-link {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  color: var(--cyan);
  font-weight: 500;
  font-size: .89rem;
  margin-top: .8rem;
}
.text-link i { transition: transform .22s ease; }
.text-link:hover i { transform: translateX(3px); }

/* ============ 未找到状态 ============ */
.not-found-zone {
  min-height: 68vh;
  padding: 4rem 0 6rem;
  background:
    linear-gradient(180deg, rgba(6,12,26,.82), rgba(5,10,20,.92)),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  display: flex;
  align-items: center;
}
.empty-panel {
  max-width: 620px;
  margin: 0 auto;
  text-align: center;
  background: rgba(8,15,30,.82);
  border: 1px solid rgba(255,255,255,.13);
  backdrop-filter: blur(16px);
  border-radius: 28px;
  padding: 3rem 2rem;
  box-shadow: var(--shadow-card);
}
.empty-icon {
  width: 68px;
  height: 68px;
  margin: 0 auto 1.5rem;
  border-radius: 24px;
  display: grid;
  place-items: center;
  color: var(--amber);
  font-size: 1.7rem;
  background: rgba(255,194,94,.1);
  border: 1px solid rgba(255,194,94,.2);
}
.empty-panel h1 { font-size: 2rem; font-weight: 700; color: #fff; margin-bottom: .75rem; }
.empty-panel p { color: var(--text-mid); margin-bottom: 1.8rem; line-height: 1.8; }

/* ============ 页脚 ============ */
.footer {
  background: #050a14;
  border-top: 1px solid rgba(255,255,255,.09);
  padding: 3.6rem 0 1.5rem;
  position: relative;
  z-index: 4;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2.1fr .9fr 1fr 1.2fr;
  gap: 2.4rem;
  margin-bottom: 2rem;
}
.footer-brand .brand-logo { font-size: 1.18rem; margin-bottom: 1rem; }
.footer-desc { font-size: .88rem; color: var(--text-muted); line-height: 1.85; margin-top: .9rem; max-width: 34ch; }
.footer-col h4 { color: #fff; font-size: .98rem; margin-bottom: 1rem; font-weight: 600; }
.footer-col ul li { margin-bottom: .62rem; }
.footer-col ul a { color: #95a6c8; font-size: .9rem; display: inline-flex; align-items: center; gap: .3rem; }
.footer-col ul a:hover { color: var(--cyan); padding-left: 3px; }
.footer-dyn { background: rgba(255,255,255,.035); border: 1px solid rgba(255,255,255,.08); border-radius: 16px; padding: 1rem 1.15rem; }
.footer-dyn span { display: block; font-size: .85rem; color: var(--text-muted); line-height: 1.75; margin-bottom: .7rem; }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .7rem 1.2rem;
  border-top: 1px solid rgba(255,255,255,.07);
  padding: 1.45rem 0 0;
  color: #687792;
  font-size: .84rem;
}
.footer-bottom a { color: #8797b8; }
.footer-bottom a:hover { color: var(--cyan); }

@media (max-width: 64em) {
  .footer-grid { grid-template-columns: 1.4fr 1fr; }
}
@media (max-width: 40em) {
  .footer-grid { grid-template-columns: 1fr; gap: 1.8rem; }
  .footer-bottom { flex-direction: column; justify-content: flex-start; align-items: flex-start; }
}

/* ============ 返回顶部 ============ */
.back-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 50;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 13px;
  border: 1px solid rgba(255,255,255,.15);
  background: rgba(8,15,30,.8);
  color: var(--cyan);
  font-size: 1.05rem;
  cursor: pointer;
  box-shadow: 0 8px 22px rgba(0,0,0,.25);
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.back-top:hover {
  transform: translateY(-3px);
  background: rgba(42,212,255,.15);
  box-shadow: 0 10px 28px rgba(42,212,255,.18);
}
@media (max-width: 48em) { .back-top { width: 38px; height: 38px; right: 14px; bottom: 14px; } }

/* ============ 响应式整体细节 ============ */
@media (max-width: 64em) {
  .article-panel { border-radius: 24px; }
  .breadcrumb-nav { font-size: .82rem; }
}
@media (max-width: 40em) {
  .breadcrumb-section { padding: .85rem 0 .55rem; }
  .bc-current { max-width: 220px; }
  .article-main { padding: 1.4rem 0 3.2rem; }
  .article-panel { padding: 1.1rem; border-radius: 20px; }
  .article-cover { border-radius: 14px; }
  .article-cover img { aspect-ratio: 16 / 10; }
  .article-tags .badge { font-size: .72rem; }
  .related-zone { padding-top: 2.2rem; }
  .related-card { border-radius: 18px; }
  .empty-panel { padding: 2rem 1.25rem; border-radius: 22px; }
  .section-head h2 { font-size: 1.35rem; }
}

/* roulang page: category1 */
:root{
  --bg:#070E1D;
  --bg-2:#0A1830;
  --panel:rgba(255,255,255,.06);
  --panel-2:rgba(255,255,255,.09);
  --line:rgba(255,255,255,.12);
  --line-hover:rgba(255,255,255,.22);
  --brand:#2AD4FF;
  --brand-soft:#8FE6FF;
  --cta-start:#0DA2FF;
  --cta-end:#00F0C2;
  --indigo:#6A7BFF;
  --green:#13E0A4;
  --warn:#FFC25E;
  --danger:#FF6B6B;
  --text:#F5F9FF;
  --text-2:#B6C3E0;
  --text-3:#7E8DB0;
  --radius-lg:24px;
  --radius-md:16px;
  --radius-sm:10px;
  --radius-btn:9px;
  --shadow-card:0 8px 24px rgba(3,10,26,.24);
  --shadow-hover:0 18px 40px rgba(0,120,255,.18);
  --shadow-cta:0 0 18px rgba(0,200,255,.35);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  background:
    radial-gradient(1100px 500px at 85% -5%,rgba(42,212,255,.10),transparent 60%),
    radial-gradient(900px 520px at -10% 15%,rgba(106,123,255,.08),transparent 55%),
    var(--bg);
  color:var(--text);
  line-height:1.85;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease)}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer;border:none;background:transparent;color:inherit}
ul,ol{list-style:none}
input,textarea{font-family:inherit}
.container{max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
.section{padding-top:104px;padding-bottom:104px;position:relative}
.eyebrow{
  display:inline-flex;align-items:center;gap:.45rem;font-size:.78rem;letter-spacing:.08em;
  font-weight:600;color:var(--brand);padding:.38rem .85rem;border:1px solid rgba(42,212,255,.3);
  background:rgba(42,212,255,.08);border-radius:999px;margin-bottom:1.1rem;
}
.section-head{margin-bottom:2.6rem}
.section-head h2{font-size:clamp(1.7rem,3vw,2.3rem);font-weight:650;letter-spacing:.01em;line-height:1.35}
.section-head h2 span{color:var(--brand)}
.section-head .lead{color:var(--text-2);max-width:36rem;margin-top:.65rem;font-size:1rem}
.section-head.center{max-width:760px;margin-left:auto;margin-right:auto;text-align:center}
.section-head.center .lead{margin-left:auto;margin-right:auto}

/* header */
.site-header{
  position:sticky;top:0;z-index:90;
  background:rgba(7,14,29,.68);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(255,255,255,.08);
  box-shadow:0 6px 24px rgba(0,0,0,.12);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1.2rem;padding-top:.8rem;padding-bottom:.8rem;position:relative}
.brand-logo{display:inline-flex;align-items:center;gap:.6rem;font-weight:700;font-size:1.2rem;letter-spacing:.01em;padding:.4rem 0}
.logo-mark{
  width:37px;height:37px;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--cta-start),var(--cta-end));color:#07101f;font-size:1rem;
  box-shadow:0 0 18px rgba(0,210,255,.3);
}
.global-nav{display:flex;justify-content:center;flex:1}
.nav-center{display:flex;align-items:center;gap:.25rem;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);padding:.3rem;border-radius:999px}
.nav-center a{
  padding:.52rem 1.02rem;border-radius:999px;font-size:.93rem;font-weight:500;color:var(--text-2);
  display:inline-flex;align-items:center;gap:.3rem;white-space:nowrap;
}
.nav-center a i{font-size:.85rem;opacity:.7}
.nav-center a:hover{color:#fff;background:rgba(255,255,255,.08)}
.nav-center a.active,.nav-center a[aria-current="page"]{color:#fff;background:rgba(42,212,255,.16);box-shadow:inset 0 0 0 1px rgba(42,212,255,.4)}
.header-actions{display:flex;align-items:center;gap:.7rem}
.menu-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid rgba(255,255,255,.12);
  justify-content:center;align-items:center;flex-direction:column;gap:5px;background:rgba(255,255,255,.05);
}
.menu-toggle span{width:18px;height:2px;background:var(--text);border-radius:2px;transition:.3s var(--ease)}
.site-header.menu-open .menu-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.site-header.menu-open .menu-toggle span:nth-child(2){opacity:0}
.site-header.menu-open .menu-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.55rem;font-weight:600;
  border-radius:var(--radius-btn);padding:.82rem 1.45rem;font-size:.96rem;letter-spacing:.02em;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{
  color:#fff;background:linear-gradient(135deg,var(--cta-start),var(--cta-end));
  box-shadow:var(--shadow-cta);
}
.btn-primary:hover{box-shadow:0 0 32px rgba(0,215,255,.52)}
.btn-ghost{color:#fff;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.2)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);box-shadow:0 0 0 4px rgba(42,212,255,.08)}
.btn-light{color:#04121f;background:#E9F8FF;border:1px solid rgba(255,255,255,.1)}
.btn-light:hover{background:#fff}
.btn-sm{padding:.5rem 1rem;font-size:.87rem;border-radius:8px}

/* page hero */
.page-hero{
  padding:clamp(4.5rem,8vw,7.4rem) 0 clamp(3.2rem,6vw,5.6rem);
  overflow:hidden;position:relative;
}
.page-hero::before{
  content:"";position:absolute;inset:0;z-index:-2;
  background:
    url("/assets/images/backpic/back-1.webp") center 28%/cover no-repeat,
    linear-gradient(135deg,#0C1C38,#0A1830);
}
.page-hero::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(700px 300px at 78% 20%,rgba(42,212,255,.16),transparent 60%),
    linear-gradient(90deg,rgba(7,14,29,.92) 0%,rgba(7,14,29,.78) 48%,rgba(7,14,29,.72) 100%);
}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(280px,.85fr);gap:clamp(1.4rem,4vw,3.8rem);align-items:center}
.hero-kicker{
  display:inline-flex;align-items:center;gap:.5rem;font-size:.78rem;letter-spacing:.08em;font-weight:600;
  color:var(--brand);text-transform:uppercase;background:rgba(42,212,255,.1);border:1px solid rgba(42,212,255,.26);
  padding:.35rem 1rem;border-radius:999px;margin-bottom:1.2rem;
}
.hero-kicker i{opacity:.9}
.page-hero h1{font-size:clamp(2.4rem,5.4vw,4rem);line-height:1.16;font-weight:700;letter-spacing:.01em;margin-bottom:1.1rem}
.page-hero h1 sup{font-size:1.1rem;color:var(--brand);margin-left:.2rem}
.hero-text{font-size:1.03rem;line-height:1.9;color:var(--text-2);max-width:38rem}
.hero-btns{margin-top:2rem;display:flex;flex-wrap:wrap;gap:.9rem}
.hero-index{
  border-radius:var(--radius-lg);padding:1.45rem 1.5rem;background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.14);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  box-shadow:var(--shadow-card);position:relative;overflow:hidden;
}
.hero-index::after{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:linear-gradient(90deg,transparent,var(--brand),transparent)}
.hero-index h3{font-size:1.06rem;font-weight:650;display:flex;align-items:center;gap:.55rem;margin-bottom:1.1rem}
.hero-index h3 i{color:var(--brand)}
.hero-index ul{display:grid;gap:.5rem}
.hero-index li{display:flex;align-items:center;gap:.7rem;color:var(--text-2);font-size:.94rem;padding:.38rem 0}
.hero-index li i{width:28px;height:28px;border-radius:8px;background:rgba(42,212,255,.13);color:var(--brand);display:inline-flex;align-items:center;justify-content:center;font-size:.75rem;flex:none}
.hero-index li a{color:var(--text);border-bottom:1px solid transparent;font-weight:500}
.hero-index li a:hover{color:var(--brand);border-color:rgba(42,212,255,.3)}
.hero-note{margin-top:1rem;font-size:.8rem;color:var(--text-3)}

/* glass card */
.glass-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-md);
  box-shadow:var(--shadow-card);transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
  position:relative;overflow:hidden;
}
.glass-card::after{content:"";position:absolute;inset:0;pointer-events:none;border-radius:inherit;padding:1px;
  background:radial-gradient(200px 80px at 10% 0%,rgba(42,212,255,.22),transparent 70%);
  -webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:.3;transition:opacity .3s}
.glass-card:hover{transform:translateY(-5px);border-color:rgba(255,255,255,.22);box-shadow:var(--shadow-hover)}
.glass-card:hover::after{opacity:.8}
.glass-card .card-body{padding:1.5rem 1.5rem}
.card-icon{
  width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.1rem;
  background:linear-gradient(135deg,rgba(13,162,255,.22),rgba(0,240,194,.14));color:var(--brand);margin-bottom:1rem;
  border:1px solid rgba(42,212,255,.25);
}
.card-kicker{font-size:.72rem;color:var(--text-3);letter-spacing:.09em;text-transform:uppercase;margin-bottom:.3rem;font-weight:600}
.card-title{font-size:1.16rem;font-weight:650;color:#fff;line-height:1.5;margin-bottom:.55rem}
.card-desc{color:var(--text-2);font-size:.925rem;line-height:1.8}
.text-link{
  display:inline-flex;align-items:center;gap:.4rem;color:var(--brand);font-weight:550;font-size:.87rem;margin-top:.9rem;
  border-bottom:1px solid rgba(42,212,255,.3);padding-bottom:2px;transition:gap .2s var(--ease);
}
.text-link i{transition:transform .2s var(--ease)}
.text-link:hover i{transform:translateX(3px)}

/* section band */
.category-main{padding-top:90px;padding-bottom:46px}
.breadcrumb{display:flex;align-items:center;gap:.5rem;flex-wrap:wrap;margin-bottom:2.2rem;font-size:.86rem;color:var(--text-3)}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{opacity:.5}
.breadcrumb .current{background:rgba(255,255,255,.08);border:1px solid var(--line);padding:.25rem .7rem;border-radius:999px;color:var(--text)}
.section-title-row{display:flex;align-items:flex-end;justify-content:space-between;gap:1.5rem;flex-wrap:wrap;margin-bottom:2.4rem}
.section-title-row h2{font-size:clamp(1.7rem,3.2vw,2.3rem);font-weight:700;line-height:1.4}
.section-title-row p{color:var(--text-2);max-width:560px;font-size:.97rem}

/* overview 2 column */
.main-col .glass-card{margin-bottom:1.4rem}
.side-col{padding-left:0}
.side-card{margin-bottom:1.4rem}
.side-card .side-pad{padding:1.5rem 1.4rem}
.side-card h3{font-size:1rem;font-weight:650;display:flex;align-items:center;gap:.5rem}
.side-card h3 i{color:var(--brand)}
.side-list{display:flex;flex-direction:column;flex:1;margin-top:.9rem}
.side-list li{border-bottom:1px solid rgba(255,255,255,.08)}
.side-list li:last-child{border-bottom:none}
.side-list a{display:flex;align-items:center;gap:.8rem;padding:.8rem 0;color:var(--text-2)}
.side-list a i{width:26px;height:26px;border-radius:8px;background:rgba(255,255,255,.07);display:inline-flex;align-items:center;justify-content:center;color:var(--brand);font-size:.7rem;flex:none}
.side-list a:hover{color:#fff}
.side-list small{display:block;color:var(--text-3);font-size:.78rem;margin-top:1px}
.media-card img{width:100%;height:190px;object-fit:cover;border-bottom:1px solid rgba(255,255,255,.08)}
.media-card .card-body p{font-size:.9rem}
.topic-badge{display:inline-flex;font-size:.75rem;background:rgba(106,123,255,.16);border:1px solid rgba(106,123,255,.35);color:#c9d1ff;padding:.14rem .68rem;border-radius:999px;margin-top:.5rem}

/* process */
.process-wrap{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem;margin-top:1rem}
.process-item{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-md);
  padding:1.7rem 1.35rem;position:relative;height:100%;transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.process-item:hover{transform:translateY(-5px);border-color:rgba(42,212,255,.4)}
.process-step{
  font-family:"DIN Alternate","Barlow Condensed",monospace;font-size:2rem;font-weight:700;color:rgba(42,212,255,.3);line-height:1;margin-bottom:.7rem;
}
.process-item h3{font-size:1.15rem;margin-bottom:.5rem}
.process-item p{color:var(--text-2);font-size:.88rem;line-height:1.7}

/* split media */
.half-media{display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);align-items:center;gap:clamp(2rem,5vw,4rem)}
.media-frame{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-card)}
.media-frame img{width:100%;height:100%;min-height:280px;object-fit:cover}
.media-content .section-head{margin-bottom:1.2rem}
.media-content .section-head h2{font-size:clamp(1.5rem,2.6vw,2rem)}
.check-row{display:flex;gap:.8rem;padding:.62rem 0;color:var(--text-2);font-size:.95rem;align-items:flex-start}
.check-row i{color:var(--green);margin-top:.35rem;flex:none}
.check-row b{color:var(--text);font-weight:600}

/* quote tip */
.tip-band{
  border:1px solid rgba(255,194,94,.3);background:linear-gradient(135deg,rgba(255,194,94,.09),rgba(255,255,255,.04));
  border-radius:var(--radius-lg);padding:1.7rem 1.8rem;display:flex;gap:1rem;align-items:flex-start;
}
.tip-band i{color:var(--warn);font-size:1.3rem;margin-top:.15rem;flex:none}
.tip-band p{color:var(--text-2);font-size:.94rem}
.tip-band strong{color:var(--text)}

/* info grid small */
.info-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}
.info-mini{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-md);padding:1.35rem 1.3rem;transition:.25s var(--ease)}
.info-mini:hover{border-color:rgba(42,212,255,.38);background:var(--panel-2)}
.info-mini .card-icon{width:40px;height:40px;margin-bottom:.75rem}
.info-mini h3{font-size:1rem;font-weight:650;margin-bottom:.35rem}
.info-mini p{color:var(--text-2);font-size:.87rem;line-height:1.7}

/* faq */
.faq-wrap .glass-card{padding:0}
.faq-item{border-bottom:1px solid rgba(255,255,255,.08);border-radius:0}
.faq-item:last-child{border-bottom:none}
.faq-toggle{display:flex;align-items:center;gap:1rem;text-align:left;padding:1.3rem 1.5rem;width:100%}
.faq-toggle .q-mark{
  width:30px;height:30px;border-radius:9px;background:rgba(42,212,255,.13);border:1px solid rgba(42,212,255,.3);
  color:var(--brand);display:inline-flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:700;flex:none;
}
.faq-toggle h3{font-size:1rem;font-weight:600;flex:1;line-height:1.6;padding-right:.5rem}
.faq-toggle .arrow{margin-left:auto;color:var(--text-3);transition:transform .3s var(--ease);font-size:.9rem;flex:none}
.faq-item.open .faq-toggle .arrow{transform:rotate(45deg);color:var(--brand)}
.faq-answer{display:grid;grid-template-rows:0fr;transition:grid-template-rows .4s var(--ease)}
.faq-item.open .faq-answer{grid-template-rows:1fr}
.faq-answer-inner{overflow:hidden}
.faq-answer-inner p{padding:0 1.5rem 1.4rem 3.1rem;color:var(--text-2);font-size:.95rem;line-height:1.9}
.faq-answer-inner a{color:var(--brand);border-bottom:1px solid rgba(42,212,255,.3)}
.faq-item.open{background:rgba(255,255,255,.035)}
.faq-item{border-bottom-color:rgba(255,255,255,.08)}

/* cta */
.cta-band{
  border-radius:var(--radius-lg);padding:clamp(2.2rem,5vw,4.2rem) clamp(1.4rem,4vw,3.5rem);text-align:center;
  background:linear-gradient(135deg,rgba(13,162,255,.15),rgba(0,240,194,.08)),url("/assets/images/backpic/back-2.webp") center/cover;
  border:1px solid rgba(42,212,255,.3);box-shadow:var(--shadow-card);position:relative;overflow:hidden;
}
.cta-band::after{content:"";position:absolute;inset:0;background:rgba(7,14,29,.55);z-index:0}
.cta-band > *{position:relative;z-index:1}
.cta-band h2{font-size:clamp(1.6rem,3vw,2.3rem);margin-bottom:.6rem}
.cta-band p{color:var(--text-2);max-width:36rem;margin:0 auto 1.8rem}
.cta-btns{display:flex;justify-content:center;gap:1rem;flex-wrap:wrap}

/* category pager */
.pager-row{display:flex;align-items:center;justify-content:space-between;gap:1.2rem;flex-wrap:wrap;padding:2.2rem 0 3rem}
.pager-link{
  display:inline-flex;align-items:center;gap:1rem;background:var(--panel);border:1px solid var(--line);
  border-radius:18px;padding:.8rem 1.05rem;transition:.25s var(--ease);
}
.pager-link:hover{border-color:var(--brand);transform:translateY(-2px)}
.pager-link small{color:var(--text-3);display:block;font-size:.76rem}
.pager-link b{font-weight:600;color:var(--text)}
.pager-link span{width:42px;height:42px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;background:rgba(42,212,255,.13);color:var(--brand)}
.pager-prev{order:1;text-align:left}
.pager-next{order:2;text-align:right}
.pager-middle{order:3;color:var(--text-3);font-size:.85rem}@media(min-width:75em){.pager-middle{margin:0 auto}}

/* footer */
.footer{
  background:#050A14;border-top:1px solid rgba(255,255,255,.08);margin-top:4rem;
  padding-top:3.6rem;
}
.footer .grid-container{max-width:1200px;margin:0 auto;padding:0 24px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:2.4rem;padding-bottom:2.6rem}
.footer-brand{display:flex;flex-direction:column;gap:1rem}
.footer-desc{color:var(--text-3);font-size:.9rem;line-height:1.85;max-width:15rem}
.footer-col h4{color:var(--text);font-size:.98rem;font-weight:650;margin-bottom:1.1rem;position:relative;padding-bottom:.55rem}
.footer-col h4::after{content:"";position:absolute;bottom:0;left:0;width:26px;height:2px;background:var(--brand);border-radius:3px}
.footer-col ul{display:grid;gap:.55rem}
.footer-col ul a,.footer-dyn a{color:var(--text-2);font-size:.9rem;display:inline-block;line-height:1.6;border-bottom:1px solid transparent}
.footer-col ul a:hover,.footer-dyn a:hover{color:var(--brand);border-bottom-color:rgba(42,212,255,.4)}
.footer-dyn span{color:var(--text-3);font-size:.85rem;line-height:1.8;display:block;margin-bottom:.5rem}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);display:flex;justify-content:space-between;align-items:center;
  gap:1.2rem;flex-wrap:wrap;padding:1.4rem 0 1.9rem;color:var(--text-3);font-size:.83rem;
}
.footer-bottom b{color:var(--text-2);font-weight:600}
.footer-bottom a:hover{color:var(--brand)}

/* responsive */
@media(max-width:75em){
  .global-nav{flex:0}
  .nav-center{gap:.1rem}
  .nav-center a{padding:.45rem .8rem;font-size:.86rem}
}
@media(max-width:64em){
  .section{padding-top:72px;padding-bottom:72px}
  .hero-grid{grid-template-columns:1fr}
  .hero-index{max-width:680px}
  .process-wrap{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr}
  .side-col{margin-top:.5rem}
  .pager-middle{display:none}
}
@media(max-width:48em){
  .container{padding-left:16px;padding-right:16px}
  .section{padding-top:48px;padding-bottom:48px}
  .site-header{border-bottom-color:rgba(255,255,255,.08)}
  .header-inner{padding-top:.55rem;padding-bottom:.55rem;flex-wrap:wrap}
  .menu-toggle{display:inline-flex}
  .global-nav{display:none;flex-basis:100%;order:4;margin-top:.3rem}
  .site-header.menu-open .global-nav{display:block}
  .nav-center{flex-direction:column;width:100%;border-radius:16px;background:rgba(255,255,255,.06);padding:.3rem;align-items:stretch}
  .nav-center a{padding:.82rem 1rem;border-radius:12px;justify-content:flex-start}
  .header-actions .btn{display:none}
  .hero-btns .btn{flex:1;justify-content:center}
  .process-wrap{grid-template-columns:1fr}
  .info-grid{grid-template-columns:1fr}
  .half-media{grid-template-columns:1fr}
  .media-frame img{min-height:200px}
  .footer-grid{grid-template-columns:1fr;gap:2rem}
  .main-col .glass-card:hover{transform:none}
  .glass-card{transform:none!important}
  .tip-band{flex-direction:column}
  .pager-row{gap:.7rem}
  .pager-link{flex:1}
}
@media(max-width:320px){
  .hero-index{display:none}
}

/* roulang page: category3 */
/* ========== 设计变量 ========== */
:root {
  --page-bg: #070E1D;
  --page-bg-2: #0A1830;
  --text-main: #F5F9FF;
  --text-strong: #FFFFFF;
  --text-secondary: #B6C3E0;
  --text-muted: #7E8DB0;
  --primary: #2AD4FF;
  --primary-2: #0DA2FF;
  --accent-green: #13E0A4;
  --accent-amber: #FFC25E;
  --accent-indigo: #6A7BFF;
  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-bg-soft: rgba(255, 255, 255, 0.045);
  --glass-border: rgba(255, 255, 255, 0.12);
  --card-radius-lg: 24px;
  --card-radius: 16px;
  --btn-radius: 10px;
  --shadow-card: 0 8px 24px rgba(3, 10, 26, 0.24);
  --shadow-hover: 0 18px 40px rgba(0, 120, 255, 0.18);
  --glow-primary: 0 0 18px rgba(0, 200, 255, 0.35);
  --glow-hover: 0 0 32px rgba(0, 200, 255, 0.5);
  --transition: 0.2s ease;
  --font-cn: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --font-num: "Barlow Condensed", "DIN Alternate", sans-serif;
}
/* ========== 基础 Reset ========== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  background: radial-gradient(circle at 20% 0%, #0A1830 0%, #070E1D 45%, #060B16 100%);
  color: var(--text-main);
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(42, 212, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 212, 255, 0.04) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.5;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
button {
  font-family: inherit;
  border: none;
  cursor: pointer;
  background: transparent;
  appearance: none;
  -webkit-appearance: none;
}
ul, ol {
  list-style: none;
}
::selection {
  background: rgba(42, 212, 255, 0.3);
  color: #fff;
}
body, .grid-container {
  position: relative;
}
.grid-container {
  max-width: 1200px;
  margin: 0 auto;
}
.grid-x {
  margin: 0 -12px;
}
.cell {
  padding: 0 12px;
}
.container-block {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}
::placeholder {
  color: var(--text-muted);
}
:focus-visible {
  outline: 2px solid rgba(42, 212, 255, 0.8);
  outline-offset: 2px;
}
/* ========== 通用按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1;
  padding: 13px 24px;
  border-radius: var(--btn-radius);
  border: 1px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary-2), #00D6A8);
  color: #FFFFFF;
  box-shadow: var(--glow-primary);
}
.btn-primary:hover {
  box-shadow: var(--glow-hover);
  transform: translateY(-2px);
  color: #fff;
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 0 12px rgba(0, 200, 255, 0.3);
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: rgba(245, 249, 255, 0.85);
  backdrop-filter: blur(12px);
}
.btn-ghost:hover {
  border-color: var(--primary);
  color: #fff;
  background: rgba(42, 212, 255, 0.09);
  transform: translateY(-2px);
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
  color: var(--primary);
  transition: gap 0.2s ease, color 0.2s ease;
}
.text-link i {
  transition: transform 0.2s ease;
  font-size: 0.85em;
}
.text-link:hover {
  color: #fff;
}
.text-link:hover i {
  transform: translateX(4px);
}
/* ========== 眉题 / 标签 ========== */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--primary);
  text-transform: uppercase;
  font-weight: 600;
  padding: 6px 14px;
  border: 1px solid rgba(42, 212, 255, 0.3);
  border-radius: 100px;
  background: rgba(42, 212, 255, 0.06);
  margin-bottom: 16px;
}
.eyebrow i {
  font-size: 0.85rem;
}
.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  padding: 7px 15px;
  background: rgba(106, 123, 255, 0.12);
  border: 1px solid rgba(106, 123, 255, 0.28);
  color: #C8CEFF;
  border-radius: 100px;
  font-weight: 600;
}
/* ========== 卡片 ========== */
.card {
  background: linear-gradient(145deg, rgba(255,255,255,0.09), rgba(255,255,255,0.045));
  border: 1px solid var(--glass-border);
  border-radius: var(--card-radius);
  padding: 28px 24px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: all var(--transition);
  position: relative;
}
.card:hover {
  box-shadow: var(--shadow-hover);
  border-color: rgba(42, 212, 255, 0.35);
  transform: translateY(-3px);
}
.card-lg {
  border-radius: var(--card-radius-lg);
  padding: 36px 30px;
}
.card-accent::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(42,212,255,0.7), transparent);
  border-radius: 4px;
}
/* ========== 顶部导航 ========== */
.page-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  background: rgba(7, 14, 29, 0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.2s ease, box-shadow 0.2s ease;
}
.page-nav:hover {
  background: rgba(7, 14, 29, 0.9);
}
.nav-align {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  height: 72px;
}
.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-strong);
  font-weight: 700;
  font-size: 1.2rem;
  white-space: nowrap;
  transition: opacity 0.2s ease;
  flex-shrink: 0;
}
.brand-logo:hover {
  opacity: 0.9;
  color: #fff;
}
.logo-mark {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0DA2FF, #00F0C2);
  border-radius: 12px;
  color: #03111F;
  font-size: 17px;
  box-shadow: 0 6px 18px rgba(0, 200, 255, 0.4);
}
.global-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
}
.nav-center {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-center a {
  color: var(--text-secondary);
  font-size: 0.955rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 40px;
  transition: all var(--transition);
  line-height: 1.4;
}
.nav-center a:hover {
  color: #fff;
  background: rgba(42, 212, 255, 0.07);
}
.nav-center a.active {
  background: linear-gradient(135deg, rgba(42,212,255,0.18), rgba(42,212,255,0.05));
  color: var(--primary);
  box-shadow: inset 0 0 0 1px rgba(42, 212, 255, 0.25);
}
.file-more {
  position: relative;
  display: none;
}
/* Header右侧操作区 */
.nav-aside {
  display: flex;
  align-items: center;
  gap: 10px;
  justify-content: flex-end;
  flex-shrink: 0;
}
.btn-nav {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(135deg, rgba(42, 212, 255, 0.95), rgba(0, 210, 168, 0.9));
  color: #001E2F;
  font-size: 0.875rem;
  font-weight: 700;
  border-radius: 30px;
  padding: 8px 16px;
  box-shadow: 0 0 14px rgba(42, 212, 255, 0.3);
  transition: all var(--transition);
}
.btn-nav:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 24px rgba(42, 212, 255, 0.5);
  color: #001E2F;
}
.burger-btn {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  font-size: 1.2rem;
}
/* 移动菜单 */
.mobile-menu {
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  z-index: 80;
  background: rgba(7, 14, 29, 0.98);
  border-bottom: 1px solid var(--glass-border);
  padding: 20px 24px 28px;
  display: none;
}
.mobile-menu.open {
  display: block;
}
.mobile-menu .nav-center {
  flex-direction: column;
  align-items: stretch;
}
.mobile-menu .nav-center a {
  padding: 12px 14px;
  border-radius: 14px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
/* ========== 页面主体 ========== */
.page-main {
  position: relative;
  z-index: 1;
}
/* Section 通用 */
.section {
  padding-top: 104px;
  padding-bottom: 104px;
  position: relative;
}
.section-bg-back {
  background-image: linear-gradient(rgba(7, 14, 29, 0.92), rgba(7, 14, 29, 0.88)), url('/assets/images/backpic/back-2.webp');
  background-position: center;
  background-size: cover;
  background-attachment: fixed;
}
/* 顶部间距 offset nav */
.hero-offset {
  padding-top: 160px;
}
/* ========== 面包屑 ========== */
.breadcrumb-bar {
  padding: 14px 0 0;
}
.breadcrumb-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.breadcrumb-inner a {
  color: var(--text-secondary);
  transition: color 0.2s;
}
.breadcrumb-inner a:hover {
  color: var(--primary);
}
.bcrumb-sep {
  opacity: 0.5;
  font-size: 0.75rem;
}
.bcrumb-current {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-main);
  padding: 4px 12px;
  border-radius: 30px;
  font-weight: 500;
}
/* ========== 分类 Hero ========== */
.cat-hero {
  padding-top: 44px;
  padding-bottom: 48px;
  position: relative;
}
.cat-hero .hero-title {
  font-size: clamp(2rem, 4.5vw, 3rem);
  line-height: 1.2;
  letter-spacing: 0.02em;
  margin-top: 10px 0 16px;
  font-weight: 700;
  color: var(--text-strong);
}
.hero-side-panel {
  background: linear-gradient(150deg, rgba(255,255,255,0.09), rgba(255,255,255,0.035));
  border: 1px solid var(--glass-border);
  border-radius: var(--card-radius-lg);
  padding: 20px;
  backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
}
.hero-side-panel::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 120px;
  background: radial-gradient(circle at top right, rgba(42,212,255,0.12), transparent 65%);
  pointer-events: none;
}
.panel-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 18px;
}
.panel-cell {
  background: rgba(255,255,255,0.035);
  border: 1px solid rgba(255,255,255,0.07);
  padding: 16px;
  border-radius: 14px;
}
.panel-cell .p-num {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--primary);
}
.panel-tip-list {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 14px;
}
.panel-tip {
  display: flex;
  gap: 10px;
  font-size: 0.86rem;
  color: var(--text-secondary);
  padding: 5px 0;
}
.panel-tip i {
  color: var(--accent-green);
  margin-top: 3px;
}
/* Hero 布局差异化 */
.hero-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}
/* ========== 内容区块标题 ========== */
.h2-title {
  font-size: clamp(1.6rem, 2.8vw, 2.1rem);
  line-height: 1.3;
  font-weight: 650;
  color: var(--text-strong);
  margin-bottom: 18px;
}
.p-lead {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-secondary);
  max-width: 640px;
}
.text-block {
  margin-bottom: 28px;
}
/* ========== 版块1 : 高风险提示卡 2x2 ========== */
.risk-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 44px;
}
.risk-icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  background: linear-gradient(145deg, rgba(255, 180, 70, 0.2), rgba(255, 180, 70, 0.08));
  border: 1px solid rgba(255, 191, 94, 0.35);
  color: var(--accent-amber);
  margin-bottom: 16px;
}
.risk-card h3 {
  color: var(--text-strong);
  font-size: 1.2rem;
  margin-bottom: 10px;
}
.risk-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}
.entry-points {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag-it {
  background: rgba(42, 212, 255, 0.09);
  border: 1px solid rgba(42, 212, 255, 0.28);
  color: var(--primary);
  font-size: 0.8rem;
  padding: 3px 10px;
  border-radius: 40px;
  font-weight: 500;
}
/* ========== 安全全流程步骤 ========== */
.steps-wrap {
  margin-top: 44px;
  position: relative;
}
.steps-row {
  display: flex;
  gap: 20px;
  position: relative;
}
.step-card {
  flex: 1;
  padding: 32px 24px;
  background: rgba(255,255,255,0.055);
  border: 1px solid var(--glass-border);
  border-radius: var(--card-radius);
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.step-card:hover {
  border-color: rgba(42, 212, 255, 0.5);
}
.step-num {
  font-family: var(--font-num);
  font-size: 2.7rem;
  font-weight: 700;
  background: linear-gradient(180deg, rgba(42,212,255,0.9), rgba(42,212,255,0.2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 16px;
}
.step-card h3 {
  color: var(--text-strong);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 10px;
}
.step-card p {
  color: var(--text-secondary);
  font-size: 0.94rem;
  line-height: 1.75;
}
/* ========== 左右混合版块 ========== */
.mix-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.3fr 0.85fr;
  gap: 24px;
  align-items: start;
}
.mix-center {
  padding: 12px;
}
.mix-center .visual {
  border-radius: 24px;
  overflow: hidden;
  position: relative;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
}
.mix-center .visual img {
  width: 100%;
  object-fit: cover;
  min-height: 220px;
}
.side-list {
  margin-top: 12px;
}
.side-item {
  display: flex;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.side-item:last-child {
  border-bottom: none;
}
.side-index {
  color: var(--primary);
  font-family: var(--font-num);
}
.side-text h4 {
  font-size: 1rem;
  color: var(--text-strong);
  margin-bottom: 4px;
  font-weight: 600;
}
.side-text p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}
/* ========== 防护场景 / 宽卡片 ========== */
.scene-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px 36px;
  margin-top: 28px;
}
.scene-item {
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(255,255,255,0.03);
  border-radius: 16px;
  padding: 22px;
}
.scene-item .icon-sm {
  color: var(--accent-indigo);
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: rgba(106,123,255,0.14);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 10px;
}
.scene-item h4 {
  color: var(--text-strong);
  margin-bottom: 8px;
  font-weight: 600;
}
.scene-item p {
  color: var(--text-muted);
  font-size: 0.93rem;
  line-height: 1.7;
  margin: 0;
}
/* 安全要点列表卡 */
.security-list-card {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: 20px 12px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.security-list-card i {
  color: var(--primary);
  margin-top: 5px;
  background: rgba(42,212,255,0.1);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
}
.security-list-card h4 {
  color: var(--text-strong);
  font-weight: 600;
  font-size: 1.1rem;
  margin-bottom: 4px;
}
.security-list-card p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}
/* ========== 相关栏目切换 ========== */
.category-switch {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.switch-item {
  border-radius: var(--card-radius);
  padding: 20px;
  height: 100%;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.09);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: all var(--transition);
}
.switch-item:hover {
  background: rgba(42,212,255,0.08);
  border-color: rgba(42,212,255,0.4);
}
.switch-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.switch-item strong {
  font-size: 1.05rem;
  color: var(--text-strong);
}
/* ========== FAQ ========== */
.faq-item {
  margin-bottom: 16px;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 16px;
  overflow: hidden;
  background: rgba(255,255,255,0.035);
}
.faq-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 24px;
  text-align: left;
  color: var(--text-strong);
  font-size: 1.05rem;
  font-weight: 600;
  transition: background 0.2s;
  background: transparent;
}
.faq-btn:hover {
  background: rgba(255,255,255,0.04);
}
.faq-btn::after {
  content: "\f068";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  color: var(--primary);
  transition: transform 0.25s ease;
  font-size: 0.9rem;
}
.faq-btn.collapsed::after {
  content: "\f067";
  transform: rotate(0);
}
.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}
.faq-body-inner {
  padding: 0 24px 24px;
  color: var(--text-secondary);
  line-height: 1.8;
  border-top: 1px solid rgba(255,255,255,0.07);
  padding-top: 20px;
  font-size: 0.96rem;
}
.faq-body.open {
  max-height: 800px;
}
/* ========== 页脚 CTA ========== */
.footer-cta-band {
  margin-top: 60px;
}
.footer-cta {
  background: linear-gradient(140deg, rgba(42,212,255,0.1), rgba(106,123,255,0.05));
  border: 1px solid rgba(42,212,255,0.2);
  border-radius: 28px;
  padding: 48px 32px;
  backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 12px;
}
.footer-cta h2 {
  color: var(--text-strong);
  font-size: clamp(1.6rem, 2.4vw, 2rem);
}
.footer-cta p {
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: 10px;
}
/* ========== 页脚 ========== */
.footer {
  background: #050A14;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 64px;
  margin-top: 40px;
  position: relative;
  z-index: 2;
  color: var(--text-secondary);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
  gap: 36px;
}
.footer-brand a.brand-logo {
  font-size: 1.1rem;
}
.footer-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin: 16px 0 22px;
  max-width: 300px;
}
.footer-col h4 {
  color: #fff;
  font-size: 0.95rem;
  margin-bottom: 18px;
  letter-spacing: 0.06em;
}
.footer-col ul li {
  margin-bottom: 12px;
}
.footer-col a {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color 0.2s;
}
.footer-col a:hover {
  color: var(--primary);
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.07);
  padding-top: 22px;
  margin-top: 48px;
  padding-bottom: 28px;
  font-size: 0.88rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  color: var(--text-muted);
}
.footer-bottom a {
  transition: color 0.2s;
}
.footer-bottom a:hover {
  color: var(--primary);
}
.footer-dyn {
  background: rgba(255,255,255,0.035);
  border-left: 2px solid var(--primary);
  padding: 14px 16px;
  font-size: 0.86rem;
  color: var(--text-muted);
  border-radius: 0 10px 10px 0;
}
/* 回到顶部 */
.backtop {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 50;
  width: 44px;
  height: 44px;
  background: rgba(13, 162, 255, 0.7);
  backdrop-filter: blur(10px);
  border-radius: 14px;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--glow-primary);
  border: 1px solid var(--glass-border);
  opacity: 0.7;
  transition: all 0.2s;
}
.backtop:hover {
  opacity: 1;
  transform: translateY(-3px);
  background: rgba(13, 162, 255, 0.95);
}
/* 动效 */
.fade-up {
  opacity: 0;
  transform: translateY(12px);
  animation: fadeUp 0.5s ease forwards;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: none; }
}
/* ========== 响应式 ========== */
@media (max-width: 75em) and (min-width: 48em) {
  .nav-center a {
    font-size: 0.88rem;
    padding: 8px 12px;
  }
  .section { padding-top: 72px; padding-bottom: 72px; }
  .hero-layout { gap: 24px; }
}
@media (max-width: 48em) {
  .container-block { padding-left: 16px; padding-right: 16px; }
  .grid-container { padding-left: 16px; padding-right: 16px; }
  .section { padding-top: 64px; padding-bottom: 64px; }
  .global-nav { display: none; }
  .btn-nav.nav-user { display: none; }
  .burger-btn { display: inline-flex; }
  .hero-offset { padding-top: 120px; }
  .hero-layout { grid-template-columns: 1fr; }
  .cat-hero { padding-top: 28px; padding-bottom: 24px; }
  .risk-grid { grid-template-columns: 1fr; gap: 16px; }
  .steps-row { flex-direction: column; gap: 16px; }
  .step-card { padding: 24px 18px; }
  .mix-grid { grid-template-columns: 1fr; }
  .mix-center { padding: 0; }
  .scene-card { grid-template-columns: 1fr; gap: 16px; }
  .category-switch { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .footer-grid .footer-brand { grid-column: span 2; }
}
@media (max-width: 30em) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: span 1; }
  .btn { width: 100%; }
  .container-block { padding-left: 12px; padding-right: 12px; }
  .panel-grid { grid-template-columns: 1fr; }
}

/* roulang page: category2 */
/* =========================================================
     设计变量
     ========================================================= */
  :root{
    --bg-deep: #070E1D;
    --bg-soft: #0A1830;
    --panel: rgba(255,255,255,0.06);
    --panel-strong: rgba(255,255,255,0.09);
    --line: rgba(255,255,255,0.12);
    --line-strong: rgba(255,255,255,0.20);
    --primary: #2AD4FF;
    --primary-deep: #0DA2FF;
    --accent: #00F0C2;
    --secondary: #6A7BFF;
    --success: #13E0A4;
    --warning: #FFC25E;
    --error: #FF6B6B;
    --text-main: #F5F9FF;
    --text-soft: #B6C3E0;
    --text-muted: #7E8DB0;
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 10px;
    --shadow-card: 0 8px 24px rgba(3,10,26,0.24);
    --shadow-hover: 0 18px 40px rgba(0,120,255,0.18);
    --shadow-primary: 0 0 18px rgba(0,200,255,0.35);
    --space-section: 104px;
    --font-cn: "PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  }

  /* =========================================================
     Reset / 基础
     ========================================================= */
  *{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    font-family:var(--font-cn);
    color:var(--text-main);
    background:radial-gradient(circle at 18% 0%,#0E1A33 0%,#070E1D 42%),#070E1D;
    line-height:1.8;
    -webkit-font-smoothing:antialiased;
  }
  body::before{
    content:"";
    position:fixed;
    inset:0;
    background-image:linear-gradient(rgba(255,255,255,0.02) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,0.02) 1px,transparent 1px);
    background-size:34px 34px;
    pointer-events:none;
    z-index:0;
  }
  body > *{position:relative;z-index:1}
  a{color:inherit;text-decoration:none}
  a:hover,a:focus{outline:none}
  button{appearance:none;-webkit-appearance:none;border:none;background:none;cursor:pointer;color:inherit}
  img{max-width:100%;display:block;height:auto}
  ul{list-style:none;margin:0;padding:0}
  h1,h2,h3,h4,p{margin:0}
  :focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
  .container{max-width:1200px;margin:0 auto;padding:0 24px}
  section{position:relative}

  /* =========================================================
     通用排版
     ========================================================= */
  .section-eyebrow{
    display:inline-flex;align-items:center;gap:.5rem;
    font-size:.78rem;letter-spacing:.08em;color:var(--primary);
    text-transform:uppercase;margin-bottom:10px;
  }
  .section-eyebrow::before{content:"";width:14px;height:1px;background:var(--primary)}
  .section-title{font-size:clamp(1.85rem,3vw,2.4rem);font-weight:650;letter-spacing:-.02em;line-height:1.3}
  .section-desc{color:var(--text-soft);margin-top:14px;max-width:760px;line-height:1.9}
  .section-head{margin-bottom:40px}
  .section-head.center{text-align:center}
  .section-head.center .section-desc{margin-left:auto;margin-right:auto}

  /* =========================================================
     按钮体系
     ========================================================= */
  .btn-primary{
    display:inline-flex;align-items:center;justify-content:center;gap:.55rem;
    font-weight:600;font-size:.95rem;color:#fff;
    background:linear-gradient(135deg,var(--primary-deep),var(--accent));
    border-radius:10px;padding:.85rem 1.65rem;
    box-shadow:var(--shadow-primary);
    transition:transform .2s ease,box-shadow .2s ease;
    border:0;line-height:1.4;
  }
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 42px rgba(0,210,255,.5)}
  .btn-primary:active{transform:translateY(0)}
  .btn-ghost{
    display:inline-flex;align-items:center;justify-content:center;gap:.55rem;
    font-weight:500;font-size:.95rem;color:var(--text-main);
    border:1px solid var(--line-strong);background:rgba(255,255,255,.03);
    border-radius:10px;padding:.85rem 1.65rem;
    transition:border-color .2s ease,background .2s ease,transform .2s ease;
  }
  .btn-ghost:hover{border-color:var(--primary);background:rgba(42,212,255,.06);transform:translateY(-2px)}
  .btn-ghost i,.btn-primary i{transition:transform .2s ease}
  .btn-ghost:hover i,.btn-primary:hover i{transform:translateX(3px)}

  /* =========================================================
     顶栏导航
     ========================================================= */
  .site-header{
    position:sticky;top:0;width:100%;
    background:rgba(7,14,29,.72);
    -webkit-backdrop-filter:blur(16px);
    backdrop-filter:blur(16px);
    border-bottom:1px solid rgba(255,255,255,.08);
    z-index:80;
    transition:background .3s ease,box-shadow .3s ease;
  }
  .site-header.is-scrolled{background:rgba(5,10,20,.86);box-shadow:0 10px 30px rgba(0,0,0,.28)}
  .nav-shell{
    display:flex;align-items:center;gap:24px;
    max-width:1200px;margin:0 auto;padding:14px 24px;
  }
  .brand-logo{
    display:inline-flex;align-items:center;gap:.55rem;
    color:var(--text-main);font-weight:700;font-size:1.1rem;letter-spacing:.01em;
    white-space:nowrap;
  }
  .logo-mark{
    display:inline-flex;align-items:center;justify-content:center;
    width:34px;height:34px;border-radius:10px;
    background:linear-gradient(135deg,rgba(13,162,255,.2),rgba(0,240,194,.15));
    border:1px solid rgba(42,212,255,.4);
    color:var(--primary);font-size:.95rem;
    box-shadow:0 0 18px rgba(42,212,255,.15);
  }
  .global-nav{margin-left:auto}
  .nav-center{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
  .nav-center a{
    display:inline-block;padding:.5rem .85rem;border-radius:8px;
    font-size:.93rem;color:var(--text-soft);font-weight:500;
    transition:color .2s ease,background .2s ease;
  }
  .nav-center a:hover{color:var(--text-main);background:rgba(255,255,255,.05)}
  .nav-center a.active,.nav-center a[aria-current="page"]{
    color:var(--primary);background:rgba(42,212,255,.1);
  }
  .nav-center a.active::after{
    content:"";display:block;height:2px;width:18px;margin:2px auto 0;
    background:linear-gradient(90deg,var(--primary),var(--accent));
    border-radius:4px;
  }
  .nav-enter{
    padding:.6rem 1.2rem;font-size:.9rem;
    background:linear-gradient(135deg,rgba(13,162,255,.14),rgba(0,240,194,.1));
    color:#fff;border:1px solid rgba(42,212,255,.35);
    box-shadow:none;border-radius:9px;
    display:inline-flex;align-items:center;gap:.4rem;
    transition:border-color .2s ease,background .2s ease;
  }
  .nav-enter:hover{border-color:var(--primary);background:rgba(13,162,255,.22)}
  .nav-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:10px;align-items:center;justify-content:center;flex-direction:column;gap:5px}
  .nav-toggle span{width:17px;height:2px;background:var(--text-main);border-radius:3px;transition:transform .2s ease,opacity .2s ease}
  .nav-toggle.is-open span:nth-child(1){transform:translateY(3.5px) rotate(45deg)}
  .nav-toggle.is-open span:nth-child(2){opacity:0}
  .nav-toggle.is-open span:nth-child(3){transform:translateY(-11px) rotate(-45deg)}

  /* =========================================================
     分类页 Banner
     ========================================================= */
  .page-banner{
    position:relative;overflow:hidden;
    padding:96px 0 74px;border-bottom:1px solid rgba(255,255,255,.08);
  }
  .banner-bg{
    position:absolute;inset:0;background-size:cover;background-position:center;
    opacity:.22;z-index:-1;transform:scale(1.05);
  }
  .page-banner::after{
    content:"";position:absolute;inset:0;z-index:-1;
    background:linear-gradient(180deg,rgba(7,14,29,.55) 0%,rgba(7,14,29,.9) 100%);
  }
  .breadcrumb{
    display:flex;align-items:center;gap:.5rem;flex-wrap:wrap;font-size:.86rem;
    color:var(--text-muted);margin-bottom:20px;
  }
  .breadcrumb a{color:var(--text-soft);transition:color .2s}
  .breadcrumb a:hover{color:var(--primary)}
  .breadcrumb .sep{color:rgba(255,255,255,.25)}
  .breadcrumb .crumb-current{
    display:inline-block;padding:.2rem .6rem;border-radius:99px;
    background:rgba(42,212,255,.1);border:1px solid rgba(42,212,255,.22);
    color:var(--primary);font-size:.82rem;
  }
  .banner-eyebrow{
    display:inline-flex;align-items:center;gap:.5rem;
    font-size:.8rem;letter-spacing:.1em;color:var(--accent);margin-bottom:12px;
  }
  .page-banner h1{
    font-size:clamp(2.4rem,5vw,3.5rem);font-weight:700;letter-spacing:-.03em;
    line-height:1.22;margin-bottom:18px;
  }
  .banner-lead{font-size:1.12rem;color:var(--text-soft);max-width:720px;line-height:2}
  .page-banner .banner-meta{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
  .meta-chip{
    display:inline-flex;align-items:center;gap:.45rem;
    background:rgba(255,255,255,.05);border:1px solid var(--line);
    padding:.45rem .9rem;border-radius:99px;font-size:.8rem;color:var(--text-soft);
  }
  .meta-chip i{color:var(--primary)}

  /* =========================================================
     全宽功能带
     ========================================================= */
  .band-section{
    padding-top:var(--space-section);padding-bottom:var(--space-section);
    border-bottom:1px solid rgba(255,255,255,.06);
  }
  .band-card{
    position:relative;overflow:hidden;
    background:linear-gradient(135deg,rgba(255,255,255,.08),rgba(255,255,255,.03));
    border:1px solid var(--line);border-radius:var(--radius-lg);
    padding:48px;
    box-shadow:var(--shadow-card);
  }
  .band-card::before{
    content:"";position:absolute;top:0;left:0;width:120px;height:3px;
    background:linear-gradient(90deg,var(--primary),var(--accent));
    border-radius:0 0 4px 0;
  }
  .band-card::after{
    content:"";position:absolute;right:-60px;bottom:-60px;width:220px;height:220px;
    background:radial-gradient(circle,rgba(42,212,255,.16),transparent 70%);
    pointer-events:none;
  }
  .band-label{font-size:.8rem;color:var(--accent);letter-spacing:.08em;margin-bottom:12px;display:block}
  .band-card h2{font-size:clamp(1.8rem,3vw,2.45rem);font-weight:700;line-height:1.3;margin-bottom:20px}
  .band-card h2 span{color:var(--primary)}
  .band-desc{font-size:1.02rem;color:var(--text-soft);line-height:2;max-width:820px}
  .band-list{
    display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:34px;
  }
  .band-item{
    background:rgba(7,14,29,.4);border:1px solid rgba(255,255,255,.1);
    padding:18px 20px;border-radius:var(--radius-md);
    display:flex;align-items:center;gap:.8rem;
    transition:transform .2s,border-color .2s;
  }
  .band-item:hover{transform:translateY(-3px);border-color:rgba(42,212,255,.4)}
  .band-item i{width:36px;height:36px;flex:0 0 36px;display:inline-flex;align-items:center;justify-content:center;border-radius:10px;background:rgba(42,212,255,.1);color:var(--primary);font-size:1rem}
  .band-item span{font-size:.92rem;font-weight:500;color:var(--text-main)}

  /* =========================================================
     交替两栏
     ========================================================= */
  .alt-section{padding-top:var(--space-section);padding-bottom:var(--space-section);border-bottom:1px solid rgba(255,255,255,.06)}
  .alt-card{
    background:var(--panel);border:1px solid var(--line);
    border-radius:var(--radius-lg);padding:36px;margin-bottom:24px;
    transition:transform .25s ease,border-color .25s ease;
    box-shadow:var(--shadow-card);
  }
  .alt-card:hover{transform:translateY(-4px);border-color:var(--line-strong)}
  .alt-card .grid-x{align-items:center}
  .alt-media{background:rgba(7,14,29,.4);border-radius:var(--radius-md);overflow:hidden;border:1px solid rgba(255,255,255,.08)}
  .alt-media img{width:100%;object-fit:cover;min-height:260px;max-height:340px;transition:transform .4s ease}
  .alt-card:hover .alt-media img{transform:scale(1.03)}
  .alt-copy{padding:10px 8px 10px 42px}
  .alt-copy .step-index{
    display:inline-flex;align-items:center;justify-content:center;
    width:38px;height:38px;border-radius:50%;
    background:linear-gradient(135deg,rgba(42,212,255,.16),rgba(0,240,194,.1));
    border:1px solid rgba(42,212,255,.3);
    color:var(--primary);font-weight:700;font-size:.95rem;margin-bottom:16px;
  }
  .alt-copy h3{font-size:1.5rem;font-weight:650;line-height:1.4;margin-bottom:14px}
  .alt-copy p{color:var(--text-soft);line-height:2;margin-bottom:6px;font-size:.98rem}
  .swap-row .alt-copy{padding:10px 42px 10px 8px}
  .swap-row .alt-media{order:2}

  /* =========================================================
     功能索引网格
     ========================================================= */
  .card-grid-section{padding-top:var(--space-section);padding-bottom:var(--space-section);border-bottom:1px solid rgba(255,255,255,.06)}
  .point-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
  .point-card{
    background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-md);
    padding:28px 22px;transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
    box-shadow:var(--shadow-card);
  }
  .point-card:hover{transform:translateY(-4px);border-color:rgba(42,212,255,.35);box-shadow:var(--shadow-hover)}
  .point-icon{
    width:42px;height:42px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
    background:rgba(106,123,255,.14);border:1px solid rgba(106,123,255,.3);color:var(--secondary);
    font-size:1.1rem;margin-bottom:18px;
  }
  .point-card:nth-child(2) .point-icon{background:rgba(42,212,255,.12);border-color:rgba(42,212,255,.3);color:var(--primary)}
  .point-card:nth-child(3) .point-icon{background:rgba(19,224,164,.12);border-color:rgba(19,224,164,.25);color:var(--success)}
  .point-card:nth-child(4) .point-icon{background:rgba(255,194,94,.12);border-color:rgba(255,194,94,.3);color:var(--warning)}
  .point-card h3{font-size:1.12rem;font-weight:600;margin-bottom:8px}
  .point-card p{color:var(--text-soft);font-size:.92rem;line-height:1.9}

  /* =========================================================
     更新区域
     ========================================================= */
  .update-section{padding-top:var(--space-section);padding-bottom:var(--space-section);border-bottom:1px solid rgba(255,255,255,.06)}
  .update-wrap{
    background:rgba(255,255,255,.05);border:1px dashed rgba(42,212,255,.25);
    border-radius:var(--radius-lg);padding:44px 48px;display:grid;grid-template-columns:1fr 1.4fr;gap:40px;
  }
  .update-left h2{font-size:1.8rem;line-height:1.3;margin-bottom:12px}
  .update-left p{color:var(--text-muted);font-size:.95rem;line-height:1.9}
  .update-left .update-icon{
    width:64px;height:64px;border-radius:20px;display:flex;align-items:center;justify-content:center;
    background:linear-gradient(135deg,rgba(42,212,255,.2),rgba(0,240,194,.12));
    border:1px solid rgba(42,212,255,.3);font-size:1.6rem;color:var(--primary);margin-bottom:24px;
  }
  .update-feature{display:flex;flex-direction:column;gap:14px}
  .update-feature li{
    display:flex;gap:.8rem;align-items:flex-start;
    background:rgba(7,14,29,.4);border:1px solid rgba(255,255,255,.1);
    border-left:3px solid var(--primary);border-radius:12px;padding:16px 18px;
  }
  .update-feature li i{margin-top:5px;color:var(--accent)}
  .update-feature li b{display:block;font-weight:600}
  .update-feature li span{font-size:.9rem;color:var(--text-soft)}

  /* =========================================================
     FAQ 手风琴
     ========================================================= */
  .faq-section{padding-top:var(--space-section);padding-bottom:var(--space-section);border-bottom:1px solid rgba(255,255,255,.06)}
  .faq-list{max-width:920px;margin:0 auto}
  .faq-item{
    background:var(--panel);border:1px solid var(--line);border-left:3px solid rgba(42,212,255,.5);
    border-radius:var(--radius-md);margin-bottom:16px;overflow:hidden;
    transition:border-color .2s ease;
  }
  .faq-item.is-open{border-color:rgba(42,212,255,.4)}
  .faq-trigger{
    width:100%;display:flex;justify-content:space-between;align-items:center;gap:18px;
    padding:22px 26px;text-align:left;color:var(--text-main);
    font-size:1.02rem;font-weight:600;line-height:1.5;transition:color .2s;
  }
  .faq-trigger .arrow-icon{
    width:29px;height:29px;flex:0 0 29px;border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    background:rgba(42,212,255,.1);border:1px solid rgba(42,212,255,.25);
    color:var(--primary);transition:transform .25s ease,background .25s ease;
  }
  .faq-item.is-open .faq-trigger .arrow-icon{transform:rotate(45deg);background:rgba(42,212,255,.2)}
  .faq-answer{
    max-height:0;overflow:hidden;transition:max-height .35s ease;
    padding:0 26px;color:var(--text-soft);line-height:2;font-size:.97rem;
  }
  .faq-item.is-open .faq-answer{max-height:360px;padding:0 26px 24px;border-top:1px solid rgba(255,255,255,.08)}
  .faq-answer a{color:var(--primary);font-weight:500}

  /* =========================================================
     CTA + 栏目切换
     ========================================================= */
  .cta-section{padding-top:72px;padding-bottom:40px}
  .cta-block{
    position:relative;overflow:hidden;text-align:center;
    background:
      radial-gradient(circle at 20% 0%,rgba(42,212,255,.18),transparent 38%),
      linear-gradient(135deg,rgba(255,255,255,.08),rgba(255,255,255,.03));
    border:1px solid var(--line);border-radius:28px;
    padding:70px 30px;
  }
  .cta-block::after{content:"";position:absolute;bottom:-30px;right:10%;width:260px;height:260px;background:radial-gradient(circle,rgba(0,240,194,.12),transparent 70%);pointer-events:none}
  .cta-block h2{font-size:clamp(1.7rem,3vw,2.3rem);font-weight:700;margin-bottom:14px}
  .cta-block p{color:var(--text-soft);max-width:620px;margin:0 auto 28px;font-size:1rem;line-height:1.9}
  .cta-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}

  .switch-section{padding-bottom:80px}
  .switch-nav{
    display:grid;grid-template-columns:1fr auto 1fr;gap:16px;align-items:center;
    background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);
    padding:24px;margin-top:36px;
  }
  .switch-prev,.switch-next{
    display:inline-flex;align-items:center;gap:.6rem;
    background:rgba(255,255,255,.04);border:1px solid var(--line);
    border-radius:12px;padding:.8rem 1.2rem;
    font-weight:500;font-size:.95rem;color:var(--text-main);
    transition:border-color .2s,background .2s,transform .2s;
  }
  .switch-prev:hover,.switch-next:hover{border-color:var(--primary);background:rgba(42,212,255,.07);transform:translateY(-2px)}
  .switch-next{justify-content:flex-end;text-align:right}
  .switch-label{color:var(--text-muted);text-align:center}
  .switch-label b{display:block;font-size:.8rem;margin-top:4px;color:var(--primary);font-weight:600}
  .switch-label .current-name{font-size:.9rem;color:var(--text-main)}

  /* =========================================================
     页脚
     ========================================================= */
  .footer{
    background:#050A14;border-top:1px solid rgba(255,255,255,.08);
    padding-top:70px;color:var(--text-soft);
  }
  .footer .grid-container{max-width:1200px}
  .footer-grid{
    display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;
    gap:40px;padding-bottom:40px;
  }
  .footer-brand .brand-logo{margin-bottom:14px}
  .footer-desc{color:var(--text-muted);font-size:.9rem;line-height:1.9;margin-top:12px}
  .footer-col h4{
    font-size:1rem;color:var(--text-main);margin-bottom:14px;font-weight:650;
  }
  .footer-col ul li{margin-bottom:9px}
  .footer-col ul a{color:var(--text-muted);font-size:.9rem;transition:color .2s,padding-left .2s}
  .footer-col ul a:hover{color:var(--primary);padding-left:3px}
  .footer-dyn{
    background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.08);
    border-radius:14px;padding:16px;font-size:.9rem;color:var(--text-muted);line-height:1.9;
  }
  .footer-dyn .text-link{
    color:var(--primary);font-weight:500;font-size:.9rem;display:inline-flex;align-items:center;gap:.4rem;
    margin-top:10px;transition:gap .2s;
  }
  .footer-dyn .text-link:hover{gap:.7rem}
  .footer-bottom{
    border-top:1px solid rgba(255,255,255,.08);
    padding:18px 0 24px;display:flex;justify-content:space-between;
    align-items:center;flex-wrap:wrap;gap:10px;
    font-size:.85rem;color:var(--text-muted);
  }
  .footer-bottom b{color:var(--text-soft);font-weight:600}
  .footer-bottom a{color:var(--text-muted);transition:color .2s}
  .footer-bottom a:hover{color:var(--primary)}

  /* =========================================================
     移动端 / 响应式
     ========================================================= */
  @media (max-width: 75em){
    .point-grid{grid-template-columns:repeat(2,1fr)}
  }
  @media (max-width: 48em){
    :root{--space-section:64px}
    .site-header.is-scrolled{background:rgba(5,10,20,.95)}
    .nav-shell{flex-wrap:wrap;padding:12px 16px}
    .nav-toggle{display:flex}
    .global-nav{
      order:3;flex-basis:100%;display:none;
      border-top:1px solid rgba(255,255,255,.07);padding-top:10px;margin-top:6px;
    }
    .global-nav.is-open{display:block}
    .nav-center{flex-direction:column;align-items:stretch;gap:2px}
    .nav-center a{padding:.75rem .7rem;border-radius:8px}
    .nav-enter{margin-left:auto}
    .page-banner{padding:66px 0 52px}
    .banner-lead{font-size:1.02rem}
    .band-card,.update-wrap{padding:28px 20px}
    .band-list{grid-template-columns:1fr}
    .update-wrap{grid-template-columns:1fr}
    .alt-section,.card-grid-section,.update-section,.faq-section{padding-top:64px;padding-bottom:64px}
    .alt-card{padding:22px}
    .alt-copy{padding:28px 4px 6px !important}
    .swap-row .alt-copy{padding:28px 4px 6px !important}
    .swap-row .alt-media{order:0}
    .footer-grid{grid-template-columns:1fr 1fr}
    .footer-brand{grid-column:1 / -1}
    .footer-bottom{flex-direction:column;justify-content:center;text-align:center}
    .switch-nav{grid-template-columns:1fr;padding:16px}
    .switch-prev,.switch-next{justify-content:center;text-align:center}
    .switch-label{border-top:1px solid rgba(255,255,255,.08);padding-top:12px}
  }
  @media (max-width: 36em){
    :root{--space-section:48px}
    .container{padding:0 16px}
    .nav-shell{padding:10px 16px}
    .brand-logo{font-size:1rem}
    .logo-mark{width:30px;height:30px}
    .page-banner h1{font-size:2.15rem}
    .section-head{margin-bottom:26px}
    .point-grid{grid-template-columns:1fr}
    .btn-primary,.btn-ghost{width:100%;padding:.8rem 1.2rem}
    .cta-actions{flex-direction:column}
    .footer-grid{grid-template-columns:1fr}
    .cta-block{padding:50px 18px;border-radius:18px}
  }

  /* Scrollbar */
  ::-webkit-scrollbar{width:8px;height:8px}
  ::-webkit-scrollbar-track{background:#0a1424}
  ::-webkit-scrollbar-thumb{background:#243a55;border-radius:99px}
  ::-webkit-scrollbar-thumb:hover{background:#31517a}

/* roulang page: category4 */
:root{
  --bg:#070E1D;
  --bg2:#0A1830;
  --surface:rgba(255,255,255,.07);
  --surface-2:rgba(255,255,255,.045);
  --stroke:rgba(255,255,255,.12);
  --stroke-soft:rgba(255,255,255,.08);
  --primary:#2AD4FF;
  --primary-deep:#0DA2FF;
  --primary-mint:#00F0C2;
  --accent:#6A7BFF;
  --success:#13E0A4;
  --warning:#FFC25E;
  --error:#FF6B6B;
  --text:#F5F9FF;
  --text-2:#B6C3E0;
  --text-muted:#7E8DB0;
  --radius-lg:24px;
  --radius-md:16px;
  --radius-sm:10px;
  --radius-btn:10px;
  --shadow-card:0 8px 24px rgba(3,10,26,.24);
  --shadow-hover:0 18px 40px rgba(0,120,255,.18);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --font-num:"Barlow Condensed","DIN Alternate",monospace;
  --section-pad:104px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-cn);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
body::before{content:"";position:fixed;inset:0;background:radial-gradient(circle at 50% -10%,rgba(42,212,255,.14),transparent 55%),radial-gradient(circle at 90% 20%,rgba(106,123,255,.08),transparent 35%),linear-gradient(135deg,#070E1D,#0A1830 60%,#070E1D);z-index:-2;pointer-events:none}
body::after{content:"";position:fixed;inset:0;z-index:-1;opacity:.25;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);background-size:72px 72px;mask-image:radial-gradient(circle at 50% 20%,#000,transparent 82%)}
img,a,button,input{display:inline-block}
a{text-decoration:none;color:inherit}
button{appearance:none;-webkit-appearance:none;border:0;background:none;cursor:pointer;font-family:inherit;color:inherit}
h1,h2,h3,h4{line-height:1.25;margin:0;letter-spacing:.01em}
p{margin:0}
ul,ol{margin:0;padding:0}
.grid-container{max-width:1200px;padding-left:24px;padding-right:24px}
.section-sub{padding:var(--section-pad) 0}
.eyebrow{display:inline-flex;align-items:center;gap:.5rem;padding:.35rem .8rem;border:1px solid rgba(42,212,255,.28);border-radius:999px;background:rgba(42,212,255,.08);color:var(--primary);font-size:.78rem;font-weight:600;letter-spacing:.08em}
.section-head{margin-bottom:2rem}
.section-head .eyebrow{margin-bottom:1rem}
.section-head h2{font-size:clamp(1.7rem,3vw,2.35rem);font-weight:650}
.section-head p{margin-top:.7rem;color:var(--text-2);max-width:720px;font-size:1rem}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.55rem;padding:.78rem 1.45rem;border-radius:var(--radius-btn);font-weight:600;font-size:.98rem;line-height:1;transition:all .2s ease;white-space:nowrap}
.btn i{font-size:.9em;position:relative;top:.06em}
.btn-glow{background:linear-gradient(135deg,var(--primary-deep),var(--primary-mint));color:#fff;box-shadow:0 0 18px rgba(0,200,255,.35)}
.btn-glow:hover{box-shadow:0 0 44px rgba(0,200,255,.5);transform:translateY(-2px)}
.btn-ghost{border:1px solid rgba(255,255,255,.3);color:rgba(255,255,255,.88);background:rgba(255,255,255,.02)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn:focus-visible,a:focus-visible,button:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:8px}
.global-nav .nav-center{display:flex;align-items:center;gap:.3rem}
.global-nav a{display:inline-flex;align-items:center;padding:.45rem .95rem;border-radius:999px;color:var(--text-2);font-size:.95rem;font-weight:500;transition:background .2s,border-color .2s,color .2s;border:1px solid transparent}
.global-nav a:hover{color:#fff;background:rgba(255,255,255,.06)}
.global-nav a.active{color:#fff;background:linear-gradient(135deg,rgba(42,212,255,.2),rgba(0,240,194,.08));border-color:rgba(42,212,255,.35)}
.site-header{position:sticky;top:0;z-index:50;padding:.85rem 0;background:rgba(5,10,20,.76);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid rgba(255,255,255,.08)}
.site-header .grid-container,.header-bar{display:flex;align-items:center;justify-content:space-between;gap:1.4rem}
.brand-logo{display:inline-flex;align-items:center;gap:.6rem;color:#fff;font-size:1.2rem;font-weight:700;letter-spacing:.02em}
.logo-mark{width:36px;height:36px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(135deg,rgba(42,212,255,.2),rgba(0,240,194,.1));border:1px solid rgba(42,212,255,.4);color:var(--primary);box-shadow:0 0 16px rgba(42,212,255,.18);font-size:1rem}
.nav-toggle{display:none}
.header-action a{border-radius:999px;padding:.52rem 1.1rem;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.18);font-size:.9rem;color:#fff;transition:all .2s}
.header-action a:hover{border-color:var(--primary);color:var(--primary)}
.page-hero{padding:74px 0 52px;position:relative}
.page-hero .hero-bg{position:absolute;inset:0;border-radius:0;opacity:.35;background:url("/assets/images/backpic/back-3.webp") center 20%/cover no-repeat;z-index:-1}
.page-hero .hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,14,29,.25),rgba(7,14,29,.96));z-index:-1}
.breadcrumb{margin-bottom:18px;display:flex;align-items:center;gap:.4rem;color:var(--text-muted);font-size:.88rem;flex-wrap:wrap}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb i{font-size:.7rem;opacity:.7}
.page-hero h1{font-size:clamp(2.4rem,5vw,3.5rem);line-height:1.16;font-weight:700;letter-spacing:.01em}
.page-hero .lead{color:var(--text-2);font-size:1.05rem;max-width:640px;margin-top:1rem;line-height:1.8}
.hero-actions{display:flex;gap:.8rem;flex-wrap:wrap;margin-top:2rem}
.hero-meta{display:flex;gap:1.2rem;flex-wrap:wrap;margin-top:2rem}
.hero-meta span{display:inline-flex;align-items:center;gap:.4rem;color:var(--text-2);font-size:.9rem}
.hero-meta i{color:var(--primary)}
.steps-wrap{background:var(--surface-2);border:1px solid var(--stroke-soft);border-radius:var(--radius-lg);padding:2rem;margin-top:38px}
.help-ways .step-item{padding:1.4rem;border:1px solid var(--stroke-soft);background:rgba(255,255,255,.045);border-radius:var(--radius-lg);height:100%;transition:transform .2s,box-shadow .2s,border-color .2s;position:relative;overflow:hidden}
.help-ways .step-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(42,212,255,.24)}
.help-ways .step-num{font-family:var(--font-num);font-size:1.25rem;display:inline-flex;align-items:center;justify-content:center;min-width:34px;height:34px;background:rgba(42,212,255,.12);border:1px solid rgba(42,212,255,.32);color:var(--primary);border-radius:10px;font-weight:700;margin-bottom:.9rem}
.help-ways .step-item i.step-ico{position:absolute;top:1.1rem;right:1.2rem;font-size:2.2rem;opacity:.1;color:var(--primary)}
.help-ways h3{font-size:1.12rem;margin-bottom:.5rem}
.help-ways p{color:var(--text-2);font-size:.94rem}
.faq-sec{background:rgba(255,255,255,.018);border-top:1px solid rgba(255,255,255,.05);border-bottom:1px solid rgba(255,255,255,.05)}
.faq-list{max-width:940px;display:flex;flex-direction:column;gap:1rem;margin-top:36px}
.faq-item{border:1px solid var(--stroke-soft);border-radius:var(--radius-lg);background:rgba(255,255,255,.045);overflow:hidden;transition:border-color .3s,box-shadow .3s}
.faq-item.open{border-color:rgba(42,212,255,.32);box-shadow:0 10px 30px rgba(0,120,255,.1)}
.faq-item .faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1.2rem 1.3rem;text-align:left;font-weight:600;font-size:1rem;color:#fff;line-height:1.5}
.faq-item .faq-q .faq-ico{width:26px;height:26px;flex:0 0 26px;display:inline-flex;align-items:center;justify-content:center;border-radius:8px;background:rgba(42,212,255,.12);border:1px solid rgba(42,212,255,.3);color:var(--primary);transition:transform .3s}
.faq-item.open .faq-q .faq-ico{transform:rotate(45deg)}
.faq-item .faq-panel{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-item .faq-body{padding:0 1.3rem 1.15rem;color:var(--text-2);font-size:.96rem;line-height:1.9;padding-left:calc(1.3rem + 36px)}
.matrix-grid .facade-card{padding:1.2rem 1.4rem;border:1px solid var(--stroke-soft);background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.035));height:100%;border-radius:var(--radius-lg);transition:all .25s ease;display:block;position:relative;}
.matrix-grid .facade-card:hover{transform:translateY(-4px);border-color:rgba(42,212,255,.4);background:linear-gradient(180deg,rgba(42,212,255,.07),rgba(0,240,194,.025));box-shadow:var(--shadow-hover)}
.facade-card .facade-top{display:flex;justify-content:space-between;gap:.7rem;align-items:center;margin-bottom:1.2rem}
.facade-card .facade-ico{width:42px;height:42px;display:inline-flex;align-items:center;justify-content:center;border-radius:12px;font-size:1.15rem;background:rgba(42,212,255,.11);border:1px solid rgba(42,212,255,.3);color:var(--primary)}
.facade-card .arrow{color:var(--text-muted);font-size:.9rem;transition:transform .25s,color .25s}
.facade-card:hover .arrow{color:var(--primary);transform:translateX(4px)}
.facade-card h3{font-size:1.05rem;margin-bottom:.45rem}
.facade-card p{color:var(--text-2);font-size:.9rem;line-height:1.7}
.facade-card .cur-tag{font-size:.7rem;color:var(--accent);border:1px solid rgba(106,123,255,.3);background:rgba(106,123,255,.12);padding:.25rem .65rem;border-radius:999px}
.help-note{display:flex;gap:1.1rem;align-items:flex-start;background:rgba(255,194,94,.04);border:1px solid rgba(255,194,94,.16);border-left:4px solid var(--warning);border-radius:var(--radius-lg);padding:1.6rem 1.7rem;max-width:1000px}
.help-note .note-ico{width:36px;height:36px;flex:0 0 36px;display:inline-flex;align-items:center;justify-content:center;border-radius:10px;background:rgba(255,194,94,.14);color:var(--warning);font-size:1rem}
.help-note h3{color:#fff;font-size:1rem;margin-bottom:.35rem}
.help-note p{color:var(--text-2);font-size:.95rem}
.cta-panel{background:linear-gradient(120deg,rgba(42,212,255,.08),rgba(0,240,194,.04)),rgba(255,255,255,.03);border:1px solid rgba(42,212,255,.22);border-radius:28px;padding:3rem 2rem;text-align:center;overflow:hidden;position:relative}
.cta-panel h2{font-size:clamp(1.6rem,3vw,2.2rem)}
.cta-panel p{color:var(--text-2);max-width:620px;margin:.8rem auto 0}
.cta-panel .btn-row{display:flex;gap:.8rem;justify-content:center;margin-top:1.7rem}
.closing-cta .grid-container{padding-top:0;padding-bottom:0}
.footer{margin-top:64px;background:#050A14;border-top:1px solid rgba(255,255,255,.07);padding:3.4rem 0 1.5rem}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:2rem}
.footer-brand .brand-logo{font-size:1.16rem;color:#fff}
.footer-desc{margin-top:1rem;color:var(--text-muted);font-size:.89rem;line-height:1.85;max-width:320px}
.footer-col h4{color:#fff;font-size:.98rem;font-weight:600;margin-bottom:1rem}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:.5rem}
.footer-col a,.footer-dyn a.text-link{color:var(--text-2);font-size:.9rem;transition:all .2s}
.footer-col a:hover,.footer-dyn a.text-link:hover{color:var(--primary)}
.footer-dyn span{display:block;color:var(--text-muted);font-size:.89rem;line-height:1.8;margin-bottom:.4rem}
.footer-bottom{display:flex;align-items:center;gap:1rem;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.06);padding-top:1.4rem;margin-top:2.5rem;color:var(--text-muted);font-size:.84rem}
.copyright-line b{color:#DDE6FF;font-weight:600}
.to-top{width:40px;height:40px;border:1px solid rgba(255,255,255,.16);border-radius:12px;background:rgba(255,255,255,.05);display:inline-flex;align-items:center;justify-content:center;color:var(--text-2);transition:all .25s}
.to-top:hover{transform:translateY(-3px);color:var(--primary);border-color:var(--primary);box-shadow:0 0 18px rgba(42,212,255,.2)}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.on{opacity:1;transform:none}
@media(max-width:1023px){
  :root{--section-pad:72px}
  .site-header .header-bar{flex-wrap:wrap}
  .grid-container{padding-left:20px;padding-right:20px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-desc{max-width:none}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:12px;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.04);color:#fff;font-size:1.2rem}
  .global-nav{display:none}
  .global-nav.open{display:block;position:absolute;top:calc(100% + 4px);left:16px;right:16px;background:#0B162B;border:1px solid rgba(255,255,255,.12);border-radius:18px;padding:1rem;box-shadow:0 18px 40px rgba(0,0,0,.4)}
  .global-nav.open .nav-center{flex-direction:column;align-items:stretch;gap:.2rem}
  .global-nav.open a{border-radius:12px;padding:.8rem 1rem}
  .header-action{display:none}
}
@media(max-width:639px){
  :root{--section-pad:48px}
  .grid-container{padding-left:16px;padding-right:16px}
  .footer-grid{grid-template-columns:1fr}
  .page-hero{padding-top:46px}
  .page-hero .lead{font-size:.98rem}
  .hero-meta{flex-direction:column;gap:.6rem}
  .faq-item .faq-body{padding-left:1.3rem}
  .help-note{flex-direction:column}
  .cta-panel{padding:2rem 1.2rem}
  .cta-panel .btn-row{flex-direction:column}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .section-head{flex-direction:column}
}
@media(max-width:520px){
  .steps-wrap{padding:1.3rem}
  .hero-actions{flex-direction:column}
}