/* roulang page: index */
/* ============ 设计变量 ============ */
:root{
  --bg-deep:#061318;
  --bg-panel:#0B2028;
  --glass:rgba(18,46,56,.55);
  --glass-strong:rgba(18,46,56,.78);
  --line:rgba(35,224,196,.18);
  --line-strong:rgba(35,224,196,.42);
  --brand:#23E0C4;
  --brand-deep:#0FA88F;
  --accent:#FF8A3D;
  --text-hi:#EAF6F4;
  --text-mid:#9DB6B6;
  --text-low:#64807F;
  --radius-card:18px;
  --radius-glass:20px;
  --radius-pill:999px;
  --shadow:0 18px 40px rgba(0,0,0,.45);
  --shadow-soft:0 10px 26px rgba(0,0,0,.32);
  --inset:inset 0 1px 0 rgba(255,255,255,.06);
  --container:1200px;
  --ease:160ms ease-out;
  --font-cn:"HarmonyOS Sans","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:"SFMono-Regular",ui-monospace,Menlo,Consolas,"Liberation Mono",monospace;
}

/* ============ reset / base ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-deep);
  color:var(--text-hi);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(35,224,196,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(35,224,196,.045) 1px,transparent 1px);
  background-size:72px 72px;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color var(--ease)}
a:hover{color:#59EFD8}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text-hi);line-height:1.35}
h1{font-size:clamp(30px,5vw,54px);letter-spacing:-.02em;font-weight:700;line-height:1.22}
h2{font-size:clamp(22px,3vw,32px);letter-spacing:-.01em}
h3{font-size:18px}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button,input{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

/* ============ 容器与板块 ============ */
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
  position:relative;
  z-index:1;
}
.section{padding:88px 0;position:relative;z-index:1}
.section-tight{padding:64px 0}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:18px;
  margin-bottom:40px;
}
.section-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:.16em;
  color:var(--brand);
  text-transform:uppercase;
  margin-bottom:12px;
}
.section-tag::before{
  content:"";
  width:22px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),transparent);
}
.section-desc{color:var(--text-mid);max-width:640px;font-size:15.5px;margin-top:12px}
.link-more{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14.5px;font-weight:600;color:var(--brand);
  padding:10px 0;
}
.link-more i{transition:transform var(--ease)}
.link-more:hover i{transform:translateX(4px)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:14px 28px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;line-height:1;letter-spacing:.02em;
  border:1px solid transparent;text-decoration:none;white-space:nowrap;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
}
.btn-primary{background:var(--brand);color:#04201C;box-shadow:0 8px 28px rgba(35,224,196,.28)}
.btn-primary:hover{background:#3DEBD0;color:#04201C;transform:translateY(-2px);box-shadow:0 16px 36px rgba(35,224,196,.42)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 18px rgba(35,224,196,.3)}
.btn-outline{background:transparent;border-color:var(--line-strong);color:var(--brand)}
.btn-outline:hover{background:rgba(35,224,196,.1);color:var(--brand);transform:translateY(-2px)}
.btn-outline:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--text-hi);padding:14px 14px}
.btn-ghost:hover{color:var(--brand)}
.btn-ghost i{transition:transform var(--ease)}
.btn-ghost:hover i{transform:translateX(4px)}
.btn-sm{padding:11px 20px;font-size:14px}
.btn-block{width:100%}

/* ============ 徽章 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--radius-pill);
  font-size:12.5px;font-weight:600;letter-spacing:.04em;
  background:rgba(35,224,196,.1);
  border:1px solid var(--line-strong);
  color:var(--brand);
}
.badge-accent{background:rgba(255,138,61,.12);border-color:rgba(255,138,61,.4);color:var(--accent)}
.badge-muted{background:rgba(157,182,182,.08);border-color:rgba(157,182,182,.25);color:var(--text-mid)}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,19,24,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{
  display:flex;align-items:center;gap:22px;
  min-height:72px;
}
.brand{display:inline-flex;align-items:center;gap:11px;flex-shrink:0}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  display:grid;place-items:center;
  background:linear-gradient(150deg,rgba(35,224,196,.22),rgba(18,46,56,.4));
  border:1px solid var(--line-strong);
  box-shadow:0 0 18px rgba(35,224,196,.18), var(--inset);
}
.brand-mark svg{width:22px;height:22px;display:block}
.brand-text{
  font-size:18px;font-weight:700;color:var(--text-hi);
  letter-spacing:.02em;white-space:nowrap;
}
.brand:hover .brand-text{color:var(--brand)}

.main-nav{display:flex;align-items:center;gap:4px;margin-left:12px;flex:1}
.nav-link{
  position:relative;
  padding:10px 14px;border-radius:10px;
  font-size:15px;font-weight:500;color:var(--text-mid);
  transition:color var(--ease),background var(--ease);
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;
  height:2px;border-radius:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform var(--ease);
}
.nav-link:hover{color:var(--text-hi);background:rgba(35,224,196,.06)}
.nav-link.is-active{color:var(--text-hi);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}

.nav-tools{display:flex;align-items:center;gap:12px;flex-shrink:0}
.search-box{
  display:flex;align-items:center;gap:9px;
  height:42px;padding:0 16px;
  border-radius:var(--radius-pill);
  background:var(--glass);border:1px solid var(--line);
  transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.search-box:focus-within{
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(35,224,196,.16),0 8px 24px rgba(35,224,196,.16);
  background:rgba(18,46,56,.8);
}
.search-box i{color:var(--text-low);font-size:14px}
.search-box input{
  width:170px;background:transparent;border:0;outline:none;
  font-size:14px;color:var(--text-hi);
}
.search-box input::placeholder{color:var(--text-low)}
.link-login{
  font-size:14.5px;font-weight:500;color:var(--text-mid);padding:8px 4px;
}
.link-login:hover{color:var(--text-hi)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  background:var(--glass);border:1px solid var(--line);color:var(--text-hi);
  align-items:center;justify-content:center;font-size:17px;
}

/* ============ Hero ============ */
.hero{
  position:relative;
  padding:76px 0 84px;
  overflow:hidden;
  background:
    radial-gradient(900px 520px at 84% 4%,rgba(35,224,196,.16),transparent 62%),
    radial-gradient(640px 420px at 6% 90%,rgba(255,138,61,.08),transparent 60%),
    linear-gradient(180deg,#08222A 0%,#061318 78%);
  border-bottom:1px solid var(--line);
}
.hero-copy{position:relative;z-index:2}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  padding:7px 15px;border-radius:var(--radius-pill);
  background:var(--glass);border:1px solid var(--line);
  font-size:13px;color:var(--text-mid);letter-spacing:.06em;
  box-shadow:var(--inset);
}
.eyebrow .dot{
  width:7px;height:7px;border-radius:50%;background:var(--brand);
  box-shadow:0 0 10px var(--brand);
}
.hero h1{margin:22px 0 18px}
.hero-sub{
  font-size:17px;color:var(--text-mid);max-width:560px;line-height:1.9;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:26px;
  font-size:13.5px;color:var(--text-low);
}
.hero-meta span{display:inline-flex;align-items:center;gap:7px}
.hero-meta i{color:var(--brand);font-size:12px}

.hero-visual{position:relative}
.hero-frame{
  position:relative;border-radius:var(--radius-glass);overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  background:var(--bg-panel);
}
.hero-frame img{width:100%;height:400px;object-fit:cover}
.hero-frame-mask{
  position:absolute;inset:0;
  background:linear-gradient(150deg,rgba(6,19,24,.72) 0%,rgba(6,19,24,.18) 46%,rgba(6,19,24,.7) 100%);
  pointer-events:none;
}
.live-chip{
  position:absolute;left:18px;bottom:18px;right:18px;
  display:flex;align-items:center;gap:10px;
  padding:13px 18px;border-radius:14px;
  background:rgba(6,19,24,.72);
  border:1px solid var(--line);
  box-shadow:var(--inset);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  font-size:14px;color:var(--text-hi);
}
.live-chip b{color:var(--brand);font-variant-numeric:tabular-nums;letter-spacing:.04em}
.live-dot{
  width:8px;height:8px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 0 4px rgba(255,138,61,.18);
  animation:pulse 1.8s infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(255,138,61,.34)}
  70%{box-shadow:0 0 0 10px rgba(255,138,61,0)}
  100%{box-shadow:0 0 0 0 rgba(255,138,61,0)}
}

/* ============ 数据带 ============ */
.stats-band{
  position:relative;z-index:1;
  padding:0;
  margin-top:-40px;
}
.stats-grid{
  display:grid;
  grid-template-columns:1.25fr 1fr 1.15fr 1fr;
  gap:0;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-glass);
  box-shadow:var(--shadow),var(--inset);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  overflow:hidden;
}
.stat-item{
  padding:28px 26px;
  border-right:1px solid var(--line);
}
.stat-item:last-child{border-right:0}
.stat-num{
  font-family:var(--font-mono);
  font-size:clamp(26px,3.4vw,38px);
  font-weight:700;
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
  color:var(--brand);
  display:inline-block;
  line-height:1.1;
}
.stat-item:nth-child(even) .stat-num{color:var(--accent)}
.stat-unit{font-size:14px;color:var(--text-mid);margin-left:8px}
.stat-label{font-size:14px;color:var(--text-low);margin-top:8px}

/* ============ 交错图文 ============ */
.feature-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
}
.feature-row.reverse .feature-media{order:2}
.feature-row.reverse .feature-text{order:1}
.feature-text h2{margin-bottom:16px}
.feature-text > p{color:var(--text-mid);margin-bottom:26px;max-width:520px}
.feature-list li{
  display:flex;gap:13px;align-items:flex-start;
  padding:12px 0;border-bottom:1px dashed rgba(35,224,196,.14);
  font-size:15px;color:var(--text-mid);
}
.feature-list li:last-child{border-bottom:0}
.feature-list i{
  color:var(--brand);font-size:13px;margin-top:7px;flex-shrink:0;
}
.feature-list b{color:var(--text-hi);font-weight:600}
.feature-media{position:relative}
.feature-media img{
  width:100%;height:330px;object-fit:cover;
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  box-shadow:var(--shadow);
}
.feature-media .float-tag{
  position:absolute;top:16px;left:16px;
  padding:7px 14px;border-radius:var(--radius-pill);
  font-size:12.5px;font-weight:600;
  background:rgba(6,19,24,.8);
  border:1px solid var(--line-strong);
  color:var(--brand);
  backdrop-filter:blur(8px);
}

/* ============ 截图轮播 ============ */
.shot-carousel{position:relative}
.shot-track{
  display:flex;gap:20px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding:6px 2px 22px;
  scrollbar-width:none;
}
.shot-track::-webkit-scrollbar{display:none}
.shot-card{
  flex:0 0 340px;
  scroll-snap-align:start;
  margin:0;
  border-radius:var(--radius-card);
  overflow:hidden;
  background:var(--glass-strong);
  border:1px solid var(--line);
  box-shadow:var(--shadow-soft),var(--inset);
  transition:transform var(--ease),border-color var(--ease);
}
.shot-card:hover{transform:translateY(-4px);border-color:var(--line-strong)}
.shot-bar{
  display:flex;align-items:center;gap:7px;
  padding:11px 15px;
  background:rgba(6,19,24,.6);
  border-bottom:1px solid var(--line);
}
.shot-bar span{width:9px;height:9px;border-radius:50%;display:block}
.shot-bar span:nth-child(1){background:#FF8A3D}
.shot-bar span:nth-child(2){background:#23E0C4}
.shot-bar span:nth-child(3){background:rgba(157,182,182,.5)}
.shot-bar em{
  margin-left:auto;font-style:normal;font-size:12px;color:var(--text-low);
  font-family:var(--font-mono);letter-spacing:.06em;
}
.shot-card img{width:100%;height:200px;object-fit:cover}
.shot-card figcaption{padding:18px 20px 22px}
.shot-card h3{font-size:17px;margin-bottom:8px}
.shot-card p{font-size:14px;color:var(--text-mid);line-height:1.75}
.car-btn{
  position:absolute;top:38%;z-index:3;
  width:46px;height:46px;border-radius:50%;
  display:grid;place-items:center;
  background:rgba(11,32,40,.9);
  border:1px solid var(--line-strong);
  color:var(--brand);font-size:15px;
  box-shadow:var(--shadow-soft);
  transition:transform var(--ease),background var(--ease);
}
.car-btn:hover{background:var(--brand);color:#04201C;transform:scale(1.06)}
.car-btn.prev{left:-14px}
.car-btn.next{right:-14px}
.car-dots{display:flex;justify-content:center;gap:9px;margin-top:4px}
.car-dots .dot{
  width:9px;height:9px;border-radius:50%;border:0;padding:0;
  background:rgba(157,182,182,.3);
  transition:background var(--ease),width var(--ease);
}
.car-dots .dot.is-active{width:26px;border-radius:var(--radius-pill);background:var(--brand)}

/* ============ 系统要求 ============ */
.spec-wrap{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-glass);
  box-shadow:var(--shadow),var(--inset);
  padding:38px 34px;
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.spec-col h3{
  display:flex;align-items:center;gap:10px;
  font-size:17px;margin-bottom:20px;padding-bottom:14px;
  border-bottom:1px solid var(--line);
}
.spec-col h3 i{color:var(--brand);font-size:15px}
.spec-list li{
  display:flex;align-items:center;gap:12px;
  padding:11px 0;font-size:14.5px;color:var(--text-mid);
}
.spec-list i{
  width:30px;height:30px;border-radius:9px;flex-shrink:0;
  display:grid;place-items:center;font-size:12.5px;
  background:rgba(35,224,196,.09);
  border:1px solid var(--line);
  color:var(--brand);
}
.spec-list strong{color:var(--text-hi);font-weight:600}
.spec-note{
  margin-top:26px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  font-size:13.5px;color:var(--text-low);
}

/* ============ 评价墙 ============ */
.review-wall{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}
.review-col{display:grid;gap:24px}
.review-col.offset{margin-top:28px}
.review-card{
  padding:26px 26px 24px;
  border-radius:var(--radius-card);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow-soft),var(--inset);
  transition:border-color var(--ease),transform var(--ease);
}
.review-card:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.review-top{display:flex;align-items:center;gap:13px;margin-bottom:16px}
.avatar{
  width:44px;height:44px;border-radius:50%;flex-shrink:0;
  display:grid;place-items:center;
  font-size:15px;font-weight:700;color:#04201C;
  background:linear-gradient(140deg,var(--brand),#0FA88F);
}
.avatar.alt{background:linear-gradient(140deg,#FFB27A,var(--accent));color:#3B1704}
.review-name{font-size:15px;font-weight:600}
.review-role{font-size:13px;color:var(--text-low)}
.review-quote{font-size:15px;color:var(--text-mid);line-height:1.85}
.review-quote::before{content:"“";color:var(--brand);font-size:20px;margin-right:2px}
.review-quote::after{content:"”";color:var(--brand);font-size:20px;margin-left:2px}
.review-stars{display:flex;gap:4px;margin-top:16px}
.review-stars i{font-size:12px;color:var(--accent)}

/* ============ 资讯列表 ============ */
.news-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.news-card{
  display:flex;flex-direction:column;
  border-radius:var(--radius-card);
  overflow:hidden;
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow-soft),var(--inset);
  transition:transform var(--ease),border-color var(--ease);
}
.news-card:hover{transform:translateY(-4px);border-color:var(--line-strong)}
.news-thumb{display:block;overflow:hidden}
.news-thumb img{width:100%;height:190px;object-fit:cover;transition:transform 400ms ease}
.news-card:hover .news-thumb img{transform:scale(1.04)}
.news-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.news-body h3{font-size:17px;line-height:1.55}
.news-body h3 a{color:var(--text-hi)}
.news-body h3 a:hover{color:var(--brand)}
.news-body p{
  font-size:14px;color:var(--text-mid);line-height:1.8;flex:1;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  display:flex;align-items:center;gap:12px;
  font-size:12.5px;color:var(--text-low);
  font-variant-numeric:tabular-nums;
  padding-top:12px;border-top:1px dashed rgba(35,224,196,.14);
}
.empty-state{
  grid-column:1 / -1;
  display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:64px 24px;
  border-radius:var(--radius-card);
  background:var(--glass);
  border:1px dashed var(--line-strong);
  color:var(--text-mid);font-size:15px;text-align:center;
}
.empty-state i{font-size:26px;color:var(--brand)}

/* ============ 下载按钮组 ============ */
.download-panel{
  border-radius:var(--radius-glass);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow),var(--inset);
  padding:44px 40px;
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.dl-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:28px}
.dl-btn{
  display:flex;align-items:center;gap:14px;
  padding:18px 20px;border-radius:16px;
  background:rgba(6,19,24,.45);
  border:1px solid var(--line-strong);
  color:var(--text-hi);
  transition:transform var(--ease),background var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.dl-btn i{font-size:22px;color:var(--brand)}
.dl-btn strong{display:block;font-size:15px;font-weight:600}
.dl-btn small{display:block;font-size:12.5px;color:var(--text-low)}
.dl-btn:hover{transform:translateY(-3px);border-color:var(--brand);background:rgba(35,224,196,.08)}
.dl-btn.is-main{
  background:var(--brand);border-color:var(--brand);color:#04201C;
  box-shadow:0 10px 30px rgba(35,224,196,.3);
}
.dl-btn.is-main i,.dl-btn.is-main small{color:rgba(4,32,28,.75)}
.dl-note{
  margin-top:24px;display:flex;flex-wrap:wrap;gap:10px 26px;
  font-size:13px;color:var(--text-low);
  font-variant-numeric:tabular-nums;
}
.dl-note span{display:inline-flex;align-items:center;gap:8px}
.dl-note i{color:var(--brand);font-size:12px}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:14px;max-width:900px}
.faq-item{
  border-radius:14px;
  background:var(--glass);
  border:1px solid var(--line);
  border-left:3px solid rgba(35,224,196,.2);
  box-shadow:var(--inset);
  overflow:hidden;
  transition:border-color var(--ease),background var(--ease);
}
.faq-item[open]{border-left-color:var(--brand);background:rgba(18,46,56,.72)}
.faq-item summary{
  display:flex;align-items:center;gap:14px;
  padding:19px 24px;
  font-size:17px;font-weight:600;color:var(--text-hi);
  cursor:pointer;list-style:none;
  transition:color var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"\f067";font-family:"Font Awesome 6 Free";font-weight:900;
  margin-left:auto;font-size:12px;color:var(--brand);
  transition:transform var(--ease);
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item summary:hover{color:var(--brand)}
.faq-item p{
  padding:0 24px 22px 24px;
  font-size:14.5px;color:var(--text-mid);line-height:1.88;
}

/* ============ 尾部 CTA ============ */
.cta-band{
  border-radius:var(--radius-glass);
  padding:52px 48px;
  background:
    radial-gradient(600px 300px at 88% 12%,rgba(35,224,196,.16),transparent 62%),
    linear-gradient(120deg,rgba(18,46,56,.9),rgba(11,32,40,.86));
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow),var(--inset);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;
}
.cta-band h2{margin-bottom:10px}
.cta-band p{color:var(--text-mid);font-size:15px;max-width:560px}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;z-index:1;
  margin-top:88px;
  padding:70px 0 0;
  background:linear-gradient(180deg,rgba(11,32,40,.5),rgba(6,19,24,.96));
  border-top:1px solid var(--line);
}
.footer-grid{gap:0}
.footer-col{padding-bottom:34px}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:18px}
.footer-desc{font-size:14px;color:var(--text-mid);line-height:1.9;max-width:330px}
.footer-title{
  font-size:14px;font-weight:700;color:var(--text-hi);
  letter-spacing:.08em;margin-bottom:16px;
}
.footer-links li{margin-bottom:11px}
.footer-links a{font-size:14px;color:var(--text-mid)}
.footer-links a:hover{color:var(--brand)}
.footer-links i{font-size:11px;color:var(--brand);margin-right:8px}
.footer-contact li{
  display:flex;gap:11px;font-size:14px;color:var(--text-mid);margin-bottom:12px;
}
.footer-contact i{color:var(--brand);margin-top:6px;font-size:13px}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0 26px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--text-low);
  font-variant-numeric:tabular-nums;
}
.footer-bottom a{color:var(--text-low)}
.footer-bottom a:hover{color:var(--brand)}

/* ============ 回到顶部 ============ */
.to-top{
  position:fixed;right:22px;bottom:26px;z-index:70;
  width:46px;height:46px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--glass-strong);
  border:1px solid var(--line-strong);
  color:var(--brand);font-size:15px;
  box-shadow:var(--shadow-soft);
  opacity:0;visibility:hidden;
  transition:opacity var(--ease),visibility var(--ease),transform var(--ease);
}
.to-top.show{opacity:1;visibility:visible}
.to-top:hover{transform:translateY(-4px);background:var(--brand);color:#04201C}

/* ============ 响应式 ============ */
@media screen and (max-width:1200px){
  .search-box input{width:130px}
  .car-btn.prev{left:0}
  .car-btn.next{right:0}
}

@media screen and (max-width:1023px){
  .section{padding:64px 0}
  .nav-wrap{gap:14px}
  .main-nav{
    position:fixed;top:72px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:6px;
    padding:20px;
    background:rgba(6,19,24,.98);
    border-bottom:1px solid var(--line);
    box-shadow:var(--shadow);
    transform:translateY(-12px);
    opacity:0;visibility:hidden;pointer-events:none;
    transition:opacity var(--ease),transform var(--ease),visibility var(--ease);
    margin-left:0;
    max-height:calc(100vh - 72px);
    overflow-y:auto;
  }
  .main-nav.is-open{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0)}
  .nav-link{padding:15px 16px;font-size:16.5px;letter-spacing:.04em;border-radius:12px}
  .nav-link::after{display:none}
  .nav-link.is-active{background:rgba(35,224,196,.1)}
  .nav-toggle{display:inline-flex}
  .search-box{display:none}
  .link-login{display:none}
  .hero{padding:52px 0 68px}
  .hero-frame img{height:320px}
  .hero-visual{margin-top:36px}
  .stats-band{margin-top:-24px}
  .stats-grid{grid-template-columns:1fr 1fr}
  .stat-item:nth-child(2){border-right:0}
  .stat-item:nth-child(1),.stat-item:nth-child(2){border-bottom:1px solid var(--line)}
  .feature-row{grid-template-columns:1fr;gap:32px}
  .feature-row.reverse .feature-media{order:0}
  .feature-row.reverse .feature-text{order:0}
  .spec-wrap{padding:30px 24px}
  .news-grid{grid-template-columns:1fr 1fr}
  .dl-grid{grid-template-columns:1fr 1fr}
  .cta-band{padding:40px 30px}
}

@media screen and (max-width:767px){
  body{font-size:16px;line-height:1.9}
  .section{padding:48px 0}
  .section-head{margin-bottom:28px}
  .brand-text{font-size:16px}
  .btn{padding:15px 24px}
  .hero-actions .btn{flex:1 1 100%}
  .hero-frame img{height:250px}
  .hero-sub{font-size:16px}
  .stats-grid{grid-template-columns:1fr}
  .stat-item{border-right:0;border-bottom:1px solid var(--line)}
  .stat-item:last-child{border-bottom:0}
  .feature-media img{height:240px}
  .shot-card{flex:0 0 82%}
  .car-btn{display:none}
  .review-wall{grid-template-columns:1fr}
  .review-col.offset{margin-top:0}
  .news-grid{grid-template-columns:1fr}
  .dl-grid{grid-template-columns:1fr}
  .download-panel{padding:30px 22px}
  .faq-item summary{font-size:16px;padding:16px 18px}
  .faq-item p{padding:0 18px 18px 18px}
  .cta-band{padding:34px 22px}
  .cta-band .btn{width:100%}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* roulang page: article */
:root{
  --bg-deep:#061318;
  --bg-panel:#0B2028;
  --glass:rgba(18,46,56,.55);
  --glass-strong:rgba(14,38,46,.86);
  --line:rgba(35,224,196,.18);
  --line-soft:rgba(35,224,196,.09);
  --brand:#23E0C4;
  --brand-deep:#0FA88F;
  --accent:#FF8A3D;
  --text-hi:#EAF6F4;
  --text-mid:#9DB6B6;
  --text-low:#64807F;
  --radius-btn:999px;
  --radius-card:18px;
  --radius-glass:20px;
  --shadow:0 18px 40px rgba(0,0,0,.45);
  --shadow-soft:0 10px 26px rgba(0,0,0,.32);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html,body{margin:0;padding:0;}
html{-webkit-text-size-adjust:100%;}
body{
  background:var(--bg-deep);
  color:var(--text-hi);
  font-family:"HarmonyOS Sans","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .18s ease-out;}
a:hover,a:focus{color:var(--text-hi);}
button,input{font-family:inherit;}
button{cursor:pointer;}
ul,ol{padding-left:0;margin:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
::selection{background:rgba(35,224,196,.28);color:#fff;}
.foundation-default-check{display:none;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 20px;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:0 26px;
  border:1px solid transparent;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  line-height:1;
  transition:transform .16s ease-out,box-shadow .16s ease-out,background .16s ease-out,color .16s ease-out,border-color .16s ease-out;
  white-space:nowrap;
}
.btn-primary{
  background:var(--brand);
  color:#04211C;
  box-shadow:0 8px 28px rgba(35,224,196,.28);
}
.btn-primary:hover,.btn-primary:focus{
  background:#3BEFD3;
  color:#04211C;
  transform:translateY(-2px);
  box-shadow:0 14px 34px rgba(35,224,196,.42);
}
.btn-primary:active{transform:translateY(0);background:var(--brand-deep);color:#04211C;}
.btn-ghost{
  background:transparent;
  border-color:var(--line);
  color:var(--text-hi);
}
.btn-ghost:hover,.btn-ghost:focus{
  border-color:var(--brand);
  color:var(--brand);
  transform:translateY(-2px);
  box-shadow:0 10px 26px rgba(35,224,196,.16);
}
.btn-ghost:active{transform:translateY(0);}
.btn-sm{min-height:40px;padding:0 20px;font-size:14px;}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
}
.btn-link{
  display:inline-flex;align-items:center;gap:8px;
  color:var(--brand);font-weight:600;font-size:15px;background:none;border:0;padding:0;
}
.btn-link i{transition:transform .18s ease-out;}
.btn-link:hover i{transform:translateX(4px);}
.btn-link:hover,.btn-link:focus{color:#3BEFD3;}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(35,224,196,.08);
  color:var(--brand);
  font-size:13px;
  line-height:1.6;
  letter-spacing:.02em;
}
.badge-accent{
  border-color:rgba(255,138,61,.28);
  background:rgba(255,138,61,.10);
  color:var(--accent);
}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(6,19,24,.82);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line-soft);
}
.nav-wrap{
  display:flex;
  align-items:center;
  gap:28px;
  min-height:72px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
  color:var(--text-hi);
}
.brand:hover{color:var(--text-hi);}
.brand-mark{
  width:34px;height:34px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:11px;
  border:1px solid var(--line);
  background:rgba(35,224,196,.08);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.brand-mark svg{width:20px;height:20px;}
.brand-text{
  font-size:17px;
  font-weight:700;
  letter-spacing:.01em;
  white-space:nowrap;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:8px;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 14px;
  color:var(--text-mid);
  font-size:15px;
  border-radius:10px;
}
.nav-link:hover,.nav-link:focus{color:var(--text-hi);background:rgba(35,224,196,.06);}
.nav-link.is-active{color:var(--text-hi);}
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:10px;
  height:2px;
  border-radius:2px;
  background:var(--brand);
  box-shadow:0 0 12px rgba(35,224,196,.7);
}
.nav-tools{
  display:flex;
  align-items:center;
  gap:14px;
  margin-left:auto;
}
.search-box{
  display:flex;
  align-items:center;
  gap:8px;
  padding:0 14px;
  height:40px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--glass);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.search-box i{color:var(--text-low);font-size:13px;}
.search-box input{
  width:180px;
  border:0;
  background:transparent;
  color:var(--text-hi);
  font-size:14px;
  height:38px;
  padding:0;
}
.search-box input::placeholder{color:var(--text-low);}
.search-box:focus-within{
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(35,224,196,.16);
}
.link-login{font-size:15px;color:var(--text-mid);}
.link-login:hover,.link-login:focus{color:var(--brand);}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  border-radius:12px;
  border:1px solid var(--line);
  background:var(--glass);
  color:var(--text-hi);
  font-size:16px;
}

/* ---------- 文章首屏 ---------- */
.article-hero{
  position:relative;
  padding:52px 0 46px;
  overflow:hidden;
  border-bottom:1px solid var(--line-soft);
  background-image:linear-gradient(180deg,rgba(6,19,24,.78),rgba(6,19,24,.97)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
}
.article-hero::after{
  content:"";
  position:absolute;
  left:-160px;top:50%;
  width:520px;height:520px;
  transform:translateY(-50%);
  background:radial-gradient(circle,rgba(35,224,196,.20),transparent 68%);
  pointer-events:none;
}
.article-hero .container{position:relative;z-index:2;}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13.5px;
  color:var(--text-low);
  margin-bottom:20px;
}
.breadcrumb a{color:var(--text-mid);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:var(--text-low);opacity:.7;}
.breadcrumb .current{
  color:var(--text-mid);
  max-width:420px;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.breadcrumb .crumb-cat{
  display:inline-flex;align-items:center;
  padding:2px 10px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(35,224,196,.07);
  color:var(--brand);
  font-size:13px;
}
.article-title{
  font-size:clamp(30px,5vw,54px);
  line-height:1.24;
  font-weight:700;
  letter-spacing:-.02em;
  color:var(--text-hi);
  max-width:900px;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px;
  margin-top:24px;
  color:var(--text-low);
  font-size:13.5px;
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--text-low);opacity:.6;}
.article-meta .meta-num{
  font-variant-numeric:tabular-nums;
  letter-spacing:.06em;
  color:var(--text-mid);
}

/* ---------- 正文 ---------- */
.article-main{padding:64px 0 72px;}
.article-body{
  max-width:760px;
  margin:0 auto;
  color:var(--text-mid);
  font-size:16.5px;
  line-height:1.9;
}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 22px;}
.article-body h2{
  font-size:clamp(22px,3vw,30px);
  line-height:1.4;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--text-hi);
  margin:52px 0 20px;
  padding:14px 18px;
  border-radius:14px;
  background:linear-gradient(90deg,rgba(35,224,196,.10),rgba(35,224,196,0));
}
.article-body h3{
  font-size:19px;
  line-height:1.5;
  font-weight:700;
  color:var(--text-hi);
  margin:36px 0 14px;
}
.article-body h4{
  font-size:17px;
  font-weight:600;
  color:var(--text-hi);
  margin:26px 0 12px;
}
.article-body a{border-bottom:1px solid rgba(35,224,196,.35);}
.article-body strong{color:var(--text-hi);}
.article-body ul,.article-body ol{
  margin:0 0 24px;
  padding-left:24px;
}
.article-body ul{list-style:none;padding-left:20px;}
.article-body ul li{
  position:relative;
  margin:0 0 12px;
  line-height:1.9;
}
.article-body ul li::before{
  content:"";
  position:absolute;
  left:-18px;top:11px;
  width:7px;height:7px;
  border-radius:50%;
  background:var(--brand);
  box-shadow:0 0 10px rgba(35,224,196,.6);
}
.article-body ol{list-style:decimal;}
.article-body ol li{margin:0 0 12px;line-height:1.9;}
.article-body ol li::marker{color:var(--brand);font-weight:700;}
.article-body blockquote{
  margin:28px 0;
  padding:16px 22px;
  border-left:3px solid var(--brand);
  border-radius:0 14px 14px 0;
  background:rgba(35,224,196,.06);
  color:var(--text-hi);
  font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{
  max-width:100%;
  height:auto;
  margin:30px auto;
  border-radius:14px;
  box-shadow:var(--shadow-soft);
}
.article-body figure{margin:30px 0;}
.article-body figcaption{
  margin-top:10px;
  text-align:center;
  font-size:13px;
  color:var(--text-low);
}
.article-body table{
  width:100%;
  border-collapse:collapse;
  margin:28px 0;
  border-radius:14px;
  overflow:hidden;
  background:var(--glass);
  border:1px solid var(--line);
  font-size:14.5px;
}
.article-body thead th{
  background:rgba(35,224,196,.10);
  color:var(--text-hi);
  font-weight:600;
  text-align:left;
  padding:13px 16px;
  border-bottom:1px solid var(--line);
  white-space:nowrap;
}
.article-body tbody td{
  padding:12px 16px;
  border-bottom:1px solid rgba(35,224,196,.08);
  color:var(--text-mid);
}
.article-body tbody tr:last-child td{border-bottom:0;}
.article-body hr{
  height:1px;border:0;
  margin:40px 0;
  background:linear-gradient(90deg,transparent,var(--line),transparent);
}
.article-body code{
  padding:2px 7px;
  border-radius:7px;
  background:rgba(35,224,196,.10);
  color:var(--brand);
  font-size:14px;
  font-variant-numeric:tabular-nums;
}
.empty-state{
  text-align:center;
  padding:56px 28px;
  border-radius:var(--radius-glass);
  border:1px solid var(--line);
  background:var(--glass);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--shadow-soft);
}
.empty-state i{font-size:34px;color:var(--brand);opacity:.85;}
.empty-state h2{
  margin:18px 0 10px;
  padding:0;background:none;
  font-size:22px;color:var(--text-hi);
}
.empty-state p{max-width:420px;margin:0 auto 24px;color:var(--text-mid);font-size:15px;}

/* ---------- 分隔与相关推荐 ---------- */
.section-divider{
  height:1px;
  margin:8px auto 56px;
  max-width:760px;
  background:linear-gradient(90deg,transparent,var(--line),transparent);
}
.related-block{max-width:1080px;margin:0 auto;}
.block-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  margin-bottom:28px;
}
.block-head h2{
  font-size:clamp(22px,3vw,30px);
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--text-hi);
}
.block-head p{color:var(--text-low);font-size:14px;}
.related-grid{margin-top:4px;}
.rel-card{
  display:flex;
  flex-direction:column;
  height:100%;
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  background:var(--glass);
  overflow:hidden;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--shadow-soft);
  transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
.rel-card:hover{
  transform:translateY(-4px);
  border-color:rgba(35,224,196,.42);
  box-shadow:0 22px 44px rgba(0,0,0,.5);
}
.rel-thumb{
  position:relative;
  aspect-ratio:16/10;
  overflow:hidden;
  background:#0d2a33;
}
.rel-thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .35s ease-out;
}
.rel-card:hover .rel-thumb img{transform:scale(1.05);}
.rel-thumb::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 40%,rgba(6,19,24,.72));
}
.rel-body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.rel-body h3{
  font-size:17px;
  font-weight:600;
  line-height:1.55;
  color:var(--text-hi);
}
.rel-card:hover .rel-body h3{color:var(--brand);}
.rel-body p{font-size:14px;color:var(--text-low);line-height:1.8;flex:1;}
.rel-more{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand);font-size:14px;font-weight:600;
}
.back-row{display:flex;justify-content:center;margin-top:46px;}

/* ---------- 尾部 CTA ---------- */
.cta-band{
  margin:0 0 72px;
}
.cta-inner{
  position:relative;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding:40px 42px;
  border-radius:var(--radius-glass);
  border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(35,224,196,.14),rgba(18,46,56,.55) 55%,rgba(255,138,61,.10));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.07),var(--shadow);
  overflow:hidden;
}
.cta-inner::after{
  content:"";
  position:absolute;right:-80px;bottom:-120px;
  width:340px;height:340px;
  background:radial-gradient(circle,rgba(255,138,61,.22),transparent 70%);
  pointer-events:none;
}
.cta-text{position:relative;z-index:2;max-width:620px;}
.cta-text h2{
  font-size:clamp(21px,2.6vw,28px);
  font-weight:700;
  color:var(--text-hi);
  letter-spacing:-.01em;
  margin-bottom:8px;
}
.cta-text p{color:var(--text-mid);font-size:14.5px;}
.cta-inner .btn{position:relative;z-index:2;}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  padding:64px 0 0;
  border-top:1px solid var(--line-soft);
  background:var(--bg-panel);
}
.site-footer::before{
  content:"";
  position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--line),transparent);
}
.footer-grid{padding-bottom:44px;}
.footer-col{margin-bottom:28px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-text{font-size:16px;font-weight:700;color:var(--text-hi);}
.footer-desc{color:var(--text-low);font-size:14px;line-height:1.9;max-width:360px;}
.footer-title{
  font-size:15px;
  font-weight:700;
  color:var(--text-hi);
  margin-bottom:18px;
  letter-spacing:.03em;
}
.footer-links li{margin-bottom:11px;}
.footer-links a{
  display:inline-flex;align-items:center;gap:8px;
  color:var(--text-mid);font-size:14px;
}
.footer-links a i{font-size:11px;color:var(--brand);opacity:.75;transition:transform .18s ease-out;}
.footer-links a:hover{color:var(--brand);}
.footer-links a:hover i{transform:translateX(3px);}
.footer-contact li{
  display:flex;align-items:flex-start;gap:10px;
  color:var(--text-mid);font-size:14px;margin-bottom:12px;line-height:1.75;
}
.footer-contact li i{color:var(--brand);margin-top:5px;font-size:13px;}
.footer-bottom{
  border-top:1px solid var(--line-soft);
  padding:22px 0 26px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
}
.footer-bottom p{color:var(--text-low);font-size:13px;}
.footer-bottom .mono{font-variant-numeric:tabular-nums;letter-spacing:.06em;}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;
  right:22px;bottom:24px;
  width:46px;height:46px;
  display:none;
  align-items:center;justify-content:center;
  border-radius:14px;
  border:1px solid var(--line);
  background:var(--glass-strong);
  color:var(--brand);
  box-shadow:var(--shadow-soft);
  z-index:70;
  transition:transform .18s ease-out,border-color .18s ease-out;
}
.to-top:hover{border-color:var(--brand);transform:translateY(-3px);}
.to-top.is-show{display:inline-flex;}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1023px){
  .search-box,.link-login{display:none;}
  .nav-toggle{display:inline-flex;}
  .main-nav{
    display:none;
    position:absolute;
    left:0;right:0;top:100%;
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    margin:0;
    padding:14px 20px 22px;
    background:rgba(6,19,24,.98);
    border-bottom:1px solid var(--line);
    box-shadow:var(--shadow);
  }
  .main-nav.is-open{display:flex;}
  .nav-link{
    min-height:52px;
    padding:0 6px;
    font-size:16px;
    letter-spacing:.06em;
    border-bottom:1px solid rgba(35,224,196,.07);
  }
  .nav-link.is-active::after{display:none;}
  .nav-link.is-active{color:var(--brand);}
  .nav-wrap{position:relative;min-height:66px;gap:14px;}
  .article-main{padding:48px 0 56px;}
  .cta-inner{padding:32px 26px;}
}
@media screen and (max-width:767px){
  .container{padding:0 20px;}
  .article-hero{padding:36px 0 34px;}
  .article-title{font-size:clamp(26px,7vw,36px);}
  .article-body{font-size:16px;line-height:1.95;}
  .article-body h2{margin-top:40px;padding:12px 14px;}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;}
  .related-grid .cell{margin-bottom:18px;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .cta-inner .btn{width:100%;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media screen and (max-width:519px){
  .brand-text{font-size:15px;}
  .btn{padding:0 20px;}
  .breadcrumb .current{max-width:220px;}
  .article-meta{gap:10px;font-size:13px;}
  .to-top{right:14px;bottom:16px;}
}

/* roulang page: category1 */
:root{
  --bg-deep:#061318;
  --bg-panel:#0B2028;
  --glass:rgba(18,46,56,.55);
  --line:rgba(35,224,196,.18);
  --brand:#23E0C4;
  --brand-deep:#0FA88F;
  --accent:#FF8A3D;
  --text-hi:#EAF6F4;
  --text-mid:#9DB6B6;
  --text-low:#64807F;
  --radius-card:18px;
  --radius-glass:20px;
  --radius-pill:999px;
  --shadow:0 18px 40px rgba(0,0,0,.45);
  --shadow-soft:0 12px 28px rgba(0,0,0,.32);
  --space-lg:88px;
  --space-md:64px;
  --space-sm:48px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-deep);
  color:var(--text-hi);
  font-family:"HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
img{max-width:100%;display:block;object-fit:cover;}
a{color:inherit;text-decoration:none;transition:color .16s ease-out;}
a:hover{color:var(--brand);}
button,input{font:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
table{border-collapse:collapse;width:100%;}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:1024px){.container{padding:0 32px;}}
.section{padding:var(--space-sm) 0;}
@media (min-width:768px){.section{padding:var(--space-md) 0;}}
@media (min-width:1024px){.section{padding:var(--space-lg) 0;}}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.12em;color:var(--brand);
  text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--brand);border-radius:2px;box-shadow:0 0 10px rgba(35,224,196,.8);}
.section-title{font-size:clamp(22px,3vw,32px);font-weight:700;letter-spacing:-.01em;line-height:1.35;margin-top:14px;}
.section-sub{color:var(--text-mid);font-size:15px;max-width:720px;margin-top:12px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:46px;padding:0 24px;border-radius:var(--radius-pill);
  border:1px solid transparent;font-size:15px;font-weight:600;white-space:nowrap;
  transition:transform .16s ease-out,box-shadow .16s ease-out,background .16s ease-out,border-color .16s ease-out,color .16s ease-out;
}
.btn-primary{background:var(--brand);color:#04211d;box-shadow:0 8px 28px rgba(35,224,196,.28);}
.btn-primary:hover{background:#3ef0d3;color:#04211d;transform:translateY(-2px);box-shadow:0 12px 34px rgba(35,224,196,.42);}
.btn-primary:active{transform:translateY(0);background:var(--brand-deep);}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text-hi);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-text{
  display:inline-flex;align-items:center;gap:8px;color:var(--brand);
  font-size:15px;font-weight:600;padding:4px 0;
}
.btn-text i{transition:transform .16s ease-out;}
.btn-text:hover i{transform:translateX(4px);}

/* ---------- 标签 / 徽章 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 14px;border-radius:var(--radius-pill);
  background:rgba(18,46,56,.5);border:1px solid var(--line);
  font-size:13px;color:var(--text-mid);
}
.tag i{color:var(--brand);font-size:12px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 11px;border-radius:var(--radius-pill);
  font-size:12px;letter-spacing:.02em;border:1px solid var(--line);color:var(--text-mid);
}
.badge-live{color:var(--brand);border-color:rgba(35,224,196,.42);background:rgba(35,224,196,.1);}
.badge-hot{color:var(--accent);border-color:rgba(255,138,61,.36);background:rgba(255,138,61,.1);}
.badge-done{color:var(--text-low);}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(6,19,24,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;gap:18px;height:72px;}
.brand{display:flex;align-items:center;gap:10px;flex:none;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:var(--glass);border:1px solid var(--line);flex:none;
}
.brand-mark svg{width:22px;height:22px;}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-.01em;white-space:nowrap;color:var(--text-hi);}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:6px;}
.nav-link{
  position:relative;padding:9px 13px;border-radius:9px;
  font-size:15px;color:var(--text-mid);white-space:nowrap;
}
.nav-link:hover{color:var(--text-hi);background:rgba(35,224,196,.07);}
.nav-link.is-active{color:var(--text-hi);}
.nav-link.is-active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;
  background:var(--brand);border-radius:2px;box-shadow:0 0 10px rgba(35,224,196,.85);
}
.nav-tools{display:flex;align-items:center;gap:14px;margin-left:auto;}
.search-box{
  display:flex;align-items:center;gap:9px;height:40px;padding:0 15px;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-pill);
  transition:border-color .16s ease-out,box-shadow .16s ease-out;
}
.search-box i{color:var(--text-low);font-size:13px;}
.search-box input{
  width:168px;background:transparent;border:0;outline:none;font-size:14px;
}
.search-box input::placeholder{color:var(--text-low);}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(35,224,196,.16);}
.link-login{font-size:15px;color:var(--text-mid);}
.link-login:hover{color:var(--brand);}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:10px;
  border:1px solid var(--line);color:var(--text-hi);place-items:center;
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand);}

/* ---------- 首屏 ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:76px 0 68px;
  background-image:
    linear-gradient(112deg,rgba(6,19,24,.95) 0%,rgba(6,19,24,.86) 46%,rgba(6,19,24,.58) 100%),
    url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    repeating-linear-gradient(0deg,rgba(35,224,196,.5) 0 1px,transparent 1px 72px),
    repeating-linear-gradient(90deg,rgba(35,224,196,.5) 0 1px,transparent 1px 72px);
  opacity:.05;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(620px 320px at 82% 16%,rgba(35,224,196,.18),transparent 72%);
}
.page-hero .container{position:relative;z-index:2;}
.crumbs{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--text-low);}
.crumbs a:hover{color:var(--brand);}
.crumbs span.sep{opacity:.5;}
.page-hero h1{
  font-size:clamp(30px,5vw,54px);font-weight:700;letter-spacing:-.02em;line-height:1.18;
  margin:18px 0 14px;max-width:820px;
}
.hero-sub{font-size:16px;color:var(--text-mid);max-width:680px;line-height:1.9;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}

/* ---------- 数据带 ---------- */
.stat-band{
  display:grid;grid-template-columns:repeat(4,1fr);
  border:1px solid var(--line);border-radius:var(--radius-card);
  background:var(--glass);box-shadow:var(--shadow-soft);overflow:hidden;
}
.stat-cell{padding:26px 24px;border-right:1px solid var(--line);}
.stat-cell:last-child{border-right:0;}
.stat-num{
  font-size:clamp(26px,3.4vw,38px);font-weight:700;line-height:1.1;
  font-variant-numeric:tabular-nums;letter-spacing:.02em;
}
.stat-cell:nth-child(odd) .stat-num{color:var(--brand);}
.stat-cell:nth-child(even) .stat-num{color:var(--accent);}
.stat-label{font-size:14px;color:var(--text-mid);margin-top:10px;}
.stat-note{font-size:13px;color:var(--text-low);margin-top:4px;}

/* ---------- 筛选胶囊 ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
.chip{
  display:inline-flex;align-items:center;gap:8px;height:38px;padding:0 18px;
  border-radius:var(--radius-pill);border:1px solid var(--line);
  background:rgba(18,46,56,.42);color:var(--text-mid);font-size:14px;
  transition:color .16s ease-out,border-color .16s ease-out,background .16s ease-out;
}
.chip:hover{color:var(--text-hi);border-color:rgba(35,224,196,.4);}
.chip.is-on{background:rgba(35,224,196,.14);border-color:var(--brand);color:var(--brand);}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;margin-top:36px;padding-left:40px;}
.timeline::before{
  content:"";position:absolute;left:9px;top:8px;bottom:8px;width:2px;
  background:linear-gradient(180deg,var(--brand) 0%,rgba(35,224,196,.35) 60%,rgba(35,224,196,0) 100%);
  border-radius:2px;
}
.tl-item{position:relative;padding-bottom:24px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:-37px;top:24px;width:12px;height:12px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 0 4px rgba(35,224,196,.14),0 0 14px rgba(35,224,196,.85);
}
.tl-item.is-muted::before{background:var(--text-low);box-shadow:0 0 0 4px rgba(100,128,127,.14);}
.tl-card{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:22px 24px;box-shadow:var(--shadow-soft);
  transition:transform .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.tl-card:hover{transform:translateY(-3px);border-color:rgba(35,224,196,.42);box-shadow:0 22px 46px rgba(0,0,0,.5);}
.tl-head{display:flex;flex-wrap:wrap;align-items:center;gap:12px;}
.tl-date{font-size:14px;font-weight:600;color:var(--brand);font-variant-numeric:tabular-nums;letter-spacing:.04em;}
.tl-title{font-size:19px;font-weight:700;line-height:1.5;margin:12px 0 8px;}
.tl-desc{font-size:15px;color:var(--text-mid);}
.tl-meta{display:flex;flex-wrap:wrap;gap:18px;margin-top:14px;font-size:13px;color:var(--text-low);}
.tl-meta i{color:var(--brand);opacity:.75;margin-right:6px;font-size:12px;}

/* ---------- 交错图文 ---------- */
.feature-split{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;}
.feature-media{
  border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow);height:340px;background:var(--bg-panel);
}
.feature-media img{width:100%;height:100%;}
.feature-list{margin-top:24px;display:grid;gap:14px;}
.feature-list li{display:flex;gap:12px;font-size:15px;color:var(--text-mid);}
.feature-list i{color:var(--brand);margin-top:6px;font-size:13px;}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:36px;position:relative;}
.step{position:relative;padding-top:26px;border-top:2px solid rgba(35,224,196,.22);}
.step-num{
  position:absolute;top:-19px;left:0;width:36px;height:36px;border-radius:50%;
  display:grid;place-items:center;background:var(--bg-deep);border:1px solid var(--brand);
  color:var(--brand);font-size:14px;font-weight:700;font-variant-numeric:tabular-nums;
}
.step h3{font-size:18px;font-weight:700;margin-bottom:10px;}
.step p{font-size:15px;color:var(--text-mid);}

/* ---------- 入口卡 ---------- */
.entry-card{
  display:grid;grid-template-columns:1.1fr .9fr;gap:0;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-glass);
  overflow:hidden;box-shadow:var(--shadow);
}
.entry-body{padding:40px 38px;}
.entry-media{min-height:280px;background:var(--bg-panel);}
.entry-media img{width:100%;height:100%;}
.entry-body h3{font-size:clamp(20px,2.4vw,26px);font-weight:700;line-height:1.4;margin:14px 0 14px;}
.entry-body p{font-size:15px;color:var(--text-mid);}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:920px;margin-top:34px;}
.faq-item{
  border:1px solid var(--line);border-radius:14px;background:rgba(11,32,40,.62);
  margin-bottom:14px;overflow:hidden;transition:border-color .16s ease-out;
}
.faq-item[open]{border-color:rgba(35,224,196,.45);}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  padding:18px 54px 18px 22px;font-size:17px;font-weight:600;
  display:flex;align-items:center;gap:12px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);
  color:var(--brand);font-size:20px;font-weight:400;line-height:1;
}
.faq-item[open] summary::after{content:"−";}
.faq-answer{
  margin:0 22px 20px;padding-left:16px;border-left:3px solid var(--brand);
  font-size:15px;color:var(--text-mid);
}

/* ---------- 尾部 CTA ---------- */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  background:linear-gradient(120deg,rgba(35,224,196,.14) 0%,rgba(18,46,56,.62) 48%,rgba(255,138,61,.1) 100%);
  border:1px solid var(--line);border-radius:22px;padding:40px 42px;
  box-shadow:var(--shadow);
}
.cta-band h2{font-size:clamp(21px,2.7vw,30px);font-weight:700;letter-spacing:-.01em;}
.cta-band p{font-size:15px;color:var(--text-mid);margin-top:10px;max-width:560px;}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:0;background:#04121a;border-top:1px solid var(--line);padding:64px 0 0;}
.footer-grid{row-gap:34px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:18px;}
.footer-desc{font-size:14px;color:var(--text-mid);line-height:1.9;max-width:380px;}
.footer-title{font-size:15px;font-weight:700;margin-bottom:16px;color:var(--text-hi);}
.footer-links li{margin-bottom:11px;}
.footer-links a{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--text-mid);}
.footer-links a i{font-size:11px;color:var(--brand);opacity:.7;}
.footer-links a:hover{color:var(--brand);}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:var(--text-mid);margin-bottom:12px;}
.footer-contact i{color:var(--brand);margin-top:6px;font-size:13px;}
.footer-bottom{
  margin-top:44px;border-top:1px solid rgba(35,224,196,.12);
  padding:22px 0;display:flex;flex-wrap:wrap;justify-content:space-between;gap:14px;
  font-size:13px;color:var(--text-low);
}
.footer-bottom a{color:var(--text-low);}
.footer-bottom a:hover{color:var(--brand);}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;right:20px;bottom:24px;z-index:70;
  width:46px;height:46px;border-radius:50%;display:grid;place-items:center;
  background:var(--glass);border:1px solid var(--line);color:var(--brand);
  backdrop-filter:blur(8px);opacity:0;pointer-events:none;
  transition:opacity .2s ease-out,transform .2s ease-out,border-color .2s ease-out;
}
.to-top.is-on{opacity:1;pointer-events:auto;}
.to-top:hover{transform:translateY(-3px);border-color:var(--brand);}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-toggle{display:grid;}
  .search-box{display:none;}
  .main-nav{
    position:fixed;left:0;right:0;top:72px;
    flex-direction:column;align-items:stretch;gap:2px;
    background:rgba(6,19,24,.98);backdrop-filter:blur(16px);
    border-bottom:1px solid var(--line);
    padding:14px 20px 30px;
    transform:translateY(-10px);opacity:0;pointer-events:none;
    transition:opacity .2s ease-out,transform .2s ease-out;
    max-height:calc(100vh - 72px);overflow-y:auto;
  }
  .main-nav.is-open{opacity:1;transform:none;pointer-events:auto;}
  .nav-link{font-size:17px;padding:14px 12px;}
  .nav-link.is-active::after{left:12px;right:auto;width:26px;bottom:8px;}
  .feature-split{grid-template-columns:1fr;gap:34px;}
  .feature-media{height:280px;}
  .entry-card{grid-template-columns:1fr;}
  .entry-media{min-height:220px;order:-1;}
  .steps{grid-template-columns:1fr;gap:34px;}
}
@media (max-width:767px){
  .stat-band{grid-template-columns:repeat(2,1fr);}
  .stat-cell{padding:20px 18px;border-bottom:1px solid var(--line);}
  .stat-cell:nth-child(2n){border-right:0;}
  .stat-cell:nth-child(n+3){border-bottom:0;}
  .page-hero{padding:52px 0 48px;}
  .hero-actions .btn{width:100%;}
  .timeline{padding-left:26px;}
  .timeline::before{left:5px;}
  .tl-item::before{left:-28px;width:10px;height:10px;top:22px;}
  .entry-body{padding:28px 24px;}
  .cta-band{padding:30px 24px;flex-direction:column;align-items:flex-start;}
  .cta-band .btn{width:100%;}
  .footer-bottom{flex-direction:column;}
}
@media (max-width:520px){
  .brand-text{font-size:15px;}
  .brand-mark{width:30px;height:30px;}
  .brand-mark svg{width:19px;height:19px;}
  .nav-wrap{gap:12px;height:64px;}
  .main-nav{top:64px;max-height:calc(100vh - 64px);}
  .nav-tools{gap:10px;}
  .btn-sm{height:36px;padding:0 14px;font-size:13px;}
  .tl-card{padding:18px 18px;}
  .tl-title{font-size:17px;}
  .timeline{padding-left:22px;}
  .tl-item::before{left:-24px;}
}

/* roulang page: category2 */
/* ===================== 设计变量 ===================== */
:root{
  --bg-deep:#061318;
  --bg-panel:#0B2028;
  --glass:rgba(18,46,56,.55);
  --glass-strong:rgba(18,46,56,.86);
  --line:rgba(35,224,196,.18);
  --line-soft:rgba(35,224,196,.09);
  --brand:#23E0C4;
  --brand-deep:#0FA88F;
  --accent:#FF8A3D;
  --text-hi:#EAF6F4;
  --text-mid:#9DB6B6;
  --text-low:#64807F;
  --r-card:18px;
  --r-glass:20px;
  --r-pill:999px;
  --shadow:0 18px 40px rgba(0,0,0,.45);
  --shadow-soft:0 10px 28px rgba(0,0,0,.32);
  --container:1200px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-cn:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}

/* ===================== 基础 reset ===================== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  background:var(--bg-deep);
  color:var(--text-hi);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  left:0;right:0;bottom:-10%;
  height:72vh;
  background:radial-gradient(58% 62% at 50% 100%,rgba(35,224,196,.15),rgba(35,224,196,0) 72%);
  pointer-events:none;
  z-index:0;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
h1,h2,h3,h4{line-height:1.25;font-weight:700;letter-spacing:-.02em;color:var(--text-hi);}
ul,ol{list-style:none;}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease);}
img{max-width:100%;display:block;border:0;}
button{font-family:inherit;border:0;background:none;cursor:pointer;color:inherit;}
input,select,textarea{font-family:inherit;font-size:15px;}
table{border-collapse:collapse;width:100%;}
.num{font-variant-numeric:tabular-nums;letter-spacing:.04em;}
::selection{background:rgba(35,224,196,.28);color:#fff;}

/* ===================== 容器与排版 ===================== */
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 20px;
  position:relative;
  z-index:2;
}
.section{padding:88px 0;position:relative;}
.section.tight{padding:64px 0;}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand);
  background:rgba(35,224,196,.08);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  padding:6px 16px;
  margin-bottom:18px;
  font-weight:600;
}
.section-title{font-size:clamp(22px,3vw,32px);margin-bottom:14px;}
.section-sub{color:var(--text-mid);font-size:16px;line-height:1.85;}
.text-accent{color:var(--accent);}
.text-brand{color:var(--brand);}
.grid-tex{
  background-image:
    linear-gradient(rgba(35,224,196,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(35,224,196,.05) 1px,transparent 1px);
  background-size:64px 64px;
}

/* ===================== 按钮 ===================== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 26px;
  border-radius:var(--r-pill);
  font-size:15px;font-weight:600;letter-spacing:.02em;
  border:1px solid transparent;
  transition:transform .16s ease-out,box-shadow .16s ease-out,background-color .16s ease-out,color .16s ease-out,border-color .16s ease-out;
  white-space:nowrap;
}
.btn-primary{
  background:var(--brand);color:#04211C;
  box-shadow:0 8px 28px rgba(35,224,196,.28);
}
.btn-primary:hover{background:#3DEBCF;color:#04211C;transform:translateY(-2px);box-shadow:0 14px 34px rgba(35,224,196,.42);}
.btn-primary:active{background:var(--brand-deep);transform:translateY(0);}
.btn-outline{
  background:transparent;color:var(--text-hi);border-color:var(--line);
}
.btn-outline:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);box-shadow:0 10px 24px rgba(0,0,0,.3);}
.btn-outline:active{transform:translateY(0);color:var(--brand-deep);}
.btn-ghost{background:none;color:var(--brand);padding:0 6px;min-height:auto;}
.btn-ghost:hover{color:#6BF2DC;gap:12px;}
.btn-ghost i{transition:transform .18s var(--ease);}
.btn-ghost:hover i{transform:translateX(4px);}
.btn-sm{min-height:38px;padding:0 18px;font-size:14px;}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.btn-block{width:100%;}

/* ===================== 标签 / 徽章 ===================== */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;letter-spacing:.04em;
  padding:4px 12px;border-radius:var(--r-pill);
  background:rgba(35,224,196,.12);
  color:var(--brand);
  border:1px solid var(--line);
}
.tag.accent{background:rgba(255,138,61,.12);color:var(--accent);border-color:rgba(255,138,61,.28);}
.tag.muted{background:rgba(157,182,182,.08);color:var(--text-mid);border-color:rgba(157,182,182,.16);}

/* ===================== 顶部导航 ===================== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,19,24,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line-soft);
}
.nav-wrap{
  display:flex;align-items:center;gap:26px;
  min-height:70px;
}
.brand{display:inline-flex;align-items:center;gap:11px;flex:0 0 auto;}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:11px;
  background:rgba(35,224,196,.09);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.brand-mark svg{width:22px;height:22px;}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.01em;color:var(--text-hi);white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:6px;flex:1 1 auto;}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;
  height:38px;padding:0 14px;
  border-radius:var(--r-pill);
  font-size:15px;color:var(--text-mid);
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.nav-link:hover{color:var(--text-hi);background:rgba(35,224,196,.06);}
.nav-link.is-active{color:var(--text-hi);font-weight:600;}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  border-radius:2px;background:var(--brand);
  box-shadow:0 0 12px rgba(35,224,196,.8);
}
.nav-tools{display:flex;align-items:center;gap:14px;flex:0 0 auto;margin-left:auto;}
.search-box{
  display:flex;align-items:center;gap:9px;
  height:40px;padding:0 16px;
  border-radius:var(--r-pill);
  background:rgba(18,46,56,.55);
  border:1px solid var(--line);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.search-box i{color:var(--text-low);font-size:13px;}
.search-box input{
  width:180px;background:none;border:0;outline:none;color:var(--text-hi);
}
.search-box input::placeholder{color:var(--text-low);}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(35,224,196,.14);}
.link-login{font-size:15px;color:var(--text-mid);padding:6px 4px;}
.link-login:hover{color:var(--brand);}
.nav-toggle{
  display:none;
  width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);
  color:var(--text-hi);font-size:17px;
  align-items:center;justify-content:center;
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand);}

/* ===================== 首屏 ===================== */
.page-hero{
  position:relative;
  overflow:hidden;
  padding:76px 0 84px;
  border-bottom:1px solid var(--line-soft);
}
.hero-bg{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  opacity:.34;
  transform:scale(1.04);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(115deg,rgba(6,19,24,.96) 0%,rgba(6,19,24,.82) 46%,rgba(6,19,24,.62) 100%),
    radial-gradient(60% 70% at 88% 92%,rgba(35,224,196,.18),rgba(35,224,196,0) 70%);
}
.hero-inner{position:relative;z-index:2;}
.hero-title{
  font-size:clamp(30px,5vw,52px);
  line-height:1.18;
  margin-bottom:20px;
  letter-spacing:-.02em;
}
.hero-sub{
  font-size:17px;line-height:1.9;color:var(--text-mid);
  max-width:620px;margin-bottom:30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:16px;align-items:center;margin-bottom:30px;}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 26px;}
.hero-points li{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--text-mid);}
.hero-points i{color:var(--brand);font-size:13px;}
.hero-card{
  border-radius:var(--r-glass);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.06);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  padding:26px 26px 22px;
}
.hero-card-title{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:13px;letter-spacing:.12em;color:var(--text-low);
  padding-bottom:16px;margin-bottom:6px;border-bottom:1px dashed var(--line);
  text-transform:uppercase;
}
.hero-card-title .dot{width:8px;height:8px;border-radius:50%;background:var(--brand);box-shadow:0 0 12px var(--brand);}
.hero-stat{display:flex;align-items:baseline;justify-content:space-between;gap:14px;padding:13px 0;border-bottom:1px solid rgba(255,255,255,.05);}
.hero-stat:last-of-type{border-bottom:0;}
.hero-stat span{font-size:14px;color:var(--text-mid);}
.hero-stat strong{font-size:24px;font-weight:700;letter-spacing:.03em;}
.hero-card-note{margin-top:14px;font-size:13px;color:var(--text-low);line-height:1.7;}

/* ===================== 筛选胶囊 ===================== */
.filter-bar{
  display:flex;align-items:center;flex-wrap:wrap;gap:12px;
  padding:16px 18px;
  border-radius:var(--r-glass);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow-soft),inset 0 1px 0 rgba(255,255,255,.06);
  margin-bottom:34px;
}
.filter-bar .filter-label{font-size:13px;color:var(--text-low);letter-spacing:.1em;margin-right:6px;}
.chip{
  display:inline-flex;align-items:center;gap:7px;
  min-height:36px;padding:0 18px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  color:var(--text-mid);font-size:14px;
  transition:all .18s var(--ease);
}
.chip:hover{color:var(--text-hi);border-color:var(--brand);transform:translateY(-1px);}
.chip.is-on{background:rgba(35,224,196,.14);color:var(--brand);border-color:rgba(35,224,196,.42);font-weight:600;}
.chip:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.filter-note{margin-left:auto;font-size:13px;color:var(--text-low);}

/* ===================== 马赛克图集 ===================== */
.g-gap{margin-left:-10px;margin-right:-10px;}
.g-gap>.cell{padding-left:10px;padding-right:10px;}
.gallery-row{align-items:stretch;margin-bottom:20px;}
.gallery-row>.cell{display:flex;}
.mosaic-item{
  position:relative;
  display:block;
  width:100%;
  min-height:320px;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--bg-panel);
  box-shadow:var(--shadow-soft);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);
}
.mosaic-item.tall{min-height:440px;}
.mosaic-item.short{min-height:300px;}
.mosaic-item img{
  position:absolute;inset:0;
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .55s var(--ease),filter .55s var(--ease);
}
.mosaic-item::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,19,24,.04) 26%,rgba(6,19,24,.52) 62%,rgba(6,19,24,.92) 100%);
  transition:opacity .35s var(--ease);
  opacity:.92;
}
.mosaic-item:hover{border-color:rgba(35,224,196,.42);box-shadow:0 22px 48px rgba(0,0,0,.5);}
.mosaic-item:hover img{transform:scale(1.03);}
.mosaic-item:hover::after{opacity:1;}
.mosaic-caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:20px 22px;
  z-index:3;
}
.mosaic-caption h3{font-size:18px;line-height:1.4;margin-bottom:8px;}
.mosaic-meta{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px;
  font-size:13px;color:var(--text-mid);
}
.mosaic-meta .sep{width:4px;height:4px;border-radius:50%;background:var(--text-low);display:inline-block;}
.mosaic-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px;}
.mosaic-placeholder{
  position:absolute;inset:0;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;
  border:2px dashed rgba(35,224,196,.35);
  border-radius:var(--r-card);
  color:var(--brand);
  background:rgba(35,224,196,.04);
  font-size:14px;
}
.mosaic-placeholder i{font-size:26px;}

/* ===================== 数据条 ===================== */
.databar{
  display:grid;
  border-radius:var(--r-glass);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow-soft),inset 0 1px 0 rgba(255,255,255,.06);
  overflow:hidden;
  margin-bottom:20px;
}
.databar.brand-mix{grid-template-columns:1.35fr 1fr 1fr 1.05fr;}
.databar.accent-mix{grid-template-columns:1fr 1.3fr 1fr 1.15fr;}
.databar-cell{
  padding:24px 26px;
  border-right:1px dashed rgba(35,224,196,.15);
  display:flex;flex-direction:column;gap:6px;justify-content:center;
}
.databar-cell:last-child{border-right:0;}
.databar-cell .k{font-size:13px;color:var(--text-low);letter-spacing:.06em;}
.databar-cell .v{font-size:clamp(24px,3vw,34px);font-weight:700;letter-spacing:.03em;line-height:1.1;}
.databar-cell .u{font-size:13px;color:var(--text-mid);}
.accent-mix .v{color:var(--accent);}
.brand-mix .v{color:var(--brand);}
.brand-mix .databar-cell:nth-child(2) .v,
.accent-mix .databar-cell:nth-child(3) .v{color:var(--accent);}

/* ===================== 规格清单 / 数据维度 ===================== */
.spec-card{
  border-radius:var(--r-glass);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.06);
  padding:28px;
  height:100%;
}
.spec-list{display:flex;flex-direction:column;}
.spec-item{
  display:flex;align-items:flex-start;gap:14px;
  padding:16px 0;
  border-bottom:1px solid rgba(255,255,255,.06);
}
.spec-item:last-child{border-bottom:0;padding-bottom:0;}
.spec-item:first-child{padding-top:0;}
.spec-icon{
  flex:0 0 40px;width:40px;height:40px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(35,224,196,.1);
  border:1px solid var(--line);
  color:var(--brand);font-size:16px;
}
.spec-text h3{font-size:16px;margin-bottom:4px;}
.spec-text p{font-size:14px;color:var(--text-mid);line-height:1.75;}
.spec-figure{
  border-radius:var(--r-glass);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  position:relative;
  min-height:380px;
  height:100%;
}
.spec-figure img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;}
.spec-figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(200deg,rgba(6,19,24,.10) 30%,rgba(6,19,24,.86) 100%);
}
.spec-figure-cap{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:22px 24px;
}
.spec-figure-cap strong{display:block;font-size:17px;margin-bottom:6px;}
.spec-figure-cap span{font-size:13px;color:var(--text-mid);}

/* ===================== 流程 ===================== */
.flow-band{
  border-radius:var(--r-glass);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.06);
  padding:12px 30px;
}
.flow-step{
  display:flex;align-items:flex-start;gap:20px;
  padding:26px 0;
  border-bottom:1px dashed rgba(35,224,196,.14);
}
.flow-step:last-child{border-bottom:0;}
.flow-index{
  flex:0 0 46px;width:46px;height:46px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  font-size:17px;font-weight:700;
  color:#04211C;background:var(--brand);
  box-shadow:0 8px 22px rgba(35,224,196,.26);
  font-variant-numeric:tabular-nums;
}
.flow-body h3{font-size:17px;margin-bottom:6px;}
.flow-body p{font-size:15px;color:var(--text-mid);}
.flow-body .flow-meta{display:inline-flex;margin-top:10px;}

/* ===================== FAQ ===================== */
.faq-list{display:flex;flex-direction:column;gap:14px;}
.faq-item{
  border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow-soft),inset 0 1px 0 rgba(255,255,255,.05);
  padding:0 24px;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.faq-item[open]{border-color:rgba(35,224,196,.4);box-shadow:0 16px 36px rgba(0,0,0,.42);}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;gap:14px;
  padding:20px 0;
  font-size:17px;font-weight:600;color:var(--text-hi);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"\f078";
  font-family:"Font Awesome 6 Free";font-weight:900;
  margin-left:auto;font-size:13px;color:var(--brand);
  transition:transform .25s var(--ease);
}
.faq-item[open] summary::after{transform:rotate(180deg);}
.faq-item summary:focus-visible{outline:2px solid var(--brand);outline-offset:4px;border-radius:8px;}
.faq-index{
  flex:0 0 30px;width:30px;height:30px;border-radius:9px;
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;color:var(--brand);
  background:rgba(35,224,196,.1);border:1px solid var(--line);
  font-variant-numeric:tabular-nums;
}
.faq-answer{
  padding:0 0 22px 44px;
  color:var(--text-mid);font-size:15px;line-height:1.85;
}

/* ===================== 尾部 CTA ===================== */
.cta-band{
  border-radius:var(--r-glass);
  background:linear-gradient(120deg,rgba(18,46,56,.9),rgba(11,32,40,.82));
  border:1px solid var(--line);
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.06);
  padding:44px 44px;
  display:flex;align-items:center;gap:32px;flex-wrap:wrap;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-80px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(35,224,196,.22),rgba(35,224,196,0) 70%);
  pointer-events:none;
}
.cta-band h2{font-size:clamp(20px,2.6vw,28px);margin-bottom:10px;}
.cta-band p{color:var(--text-mid);font-size:15px;max-width:640px;}
.cta-band .cta-actions{margin-left:auto;display:flex;gap:14px;flex-wrap:wrap;position:relative;z-index:2;}

/* ===================== 页脚 ===================== */
.site-footer{
  border-top:1px solid var(--line-soft);
  background:rgba(8,24,30,.86);
  padding:64px 0 0;
  margin-top:88px;
  position:relative;z-index:2;
}
.footer-grid{padding-bottom:44px;}
.footer-col{margin-bottom:30px;}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px;}
.footer-brand .brand-text{font-size:16px;}
.footer-desc{font-size:14px;color:var(--text-mid);line-height:1.85;max-width:340px;}
.footer-title{font-size:15px;font-weight:700;color:var(--text-hi);margin-bottom:16px;letter-spacing:.02em;}
.footer-links li{margin-bottom:11px;}
.footer-links a{display:inline-flex;align-items:center;gap:9px;font-size:14px;color:var(--text-mid);}
.footer-links a i{font-size:11px;color:var(--text-low);transition:color .18s var(--ease),transform .18s var(--ease);}
.footer-links a:hover{color:var(--brand);}
.footer-links a:hover i{color:var(--brand);transform:translateX(3px);}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--text-mid);margin-bottom:12px;}
.footer-contact i{color:var(--brand);font-size:14px;margin-top:5px;}
.footer-bottom{
  border-top:1px solid var(--line-soft);
  padding:20px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-low);
}
.footer-bottom a{color:var(--text-low);}
.footer-bottom a:hover{color:var(--brand);}

/* ===================== 回到顶部 ===================== */
.to-top{
  position:fixed;right:24px;bottom:28px;z-index:70;
  width:46px;height:46px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--glass-strong);
  border:1px solid var(--line);
  color:var(--brand);font-size:15px;
  box-shadow:var(--shadow);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:all .28s var(--ease);
  backdrop-filter:blur(10px);
}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--brand);color:#04211C;border-color:var(--brand);}

/* ===================== 响应式 ===================== */
@media (min-width:1440px){
  .container{padding:0 32px;}
}
@media (max-width:1120px){
  .search-box input{width:130px;}
}
@media (max-width:1023px){
  .site-header{position:sticky;}
  .nav-wrap{min-height:64px;gap:14px;}
  .nav-toggle{display:inline-flex;}
  .link-login{display:none;}
  .search-box{display:none;}
  .main-nav{
    position:fixed;
    top:64px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:4px;
    background:rgba(6,19,24,.97);
    backdrop-filter:blur(16px);
    border-bottom:1px solid var(--line);
    padding:18px 20px 26px;
    display:none;
    max-height:calc(100vh - 64px);
    overflow-y:auto;
  }
  .main-nav.is-open{display:flex;}
  .nav-link{
    height:52px;padding:0 8px;font-size:17px;letter-spacing:.04em;
    border-bottom:1px solid rgba(35,224,196,.08);
    border-radius:0;
  }
  .nav-link.is-active::after{left:8px;right:auto;width:34px;bottom:0;}
  .section{padding:64px 0;}
  .page-hero{padding:56px 0 64px;}
  .hero-card{margin-top:36px;}
  .databar.brand-mix,
  .databar.accent-mix{grid-template-columns:1fr 1fr;}
  .databar-cell:nth-child(2){border-right:0;}
  .databar-cell:nth-child(1),
  .databar-cell:nth-child(2){border-bottom:1px dashed rgba(35,224,196,.15);}
  .mosaic-item{min-height:300px;}
  .mosaic-item.tall{min-height:360px;}
  .cta-band{padding:34px 28px;}
  .cta-band .cta-actions{margin-left:0;width:100%;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:28px;}
  .hero-title{font-size:clamp(28px,7vw,36px);}
  .hero-sub{font-size:16px;line-height:1.9;}
  .hero-actions{gap:12px;}
  .hero-actions .btn{width:100%;}
  .filter-bar{padding:14px;gap:10px;}
  .filter-note{margin-left:0;width:100%;}
  .mosaic-item,
  .mosaic-item.tall,
  .mosaic-item.short{min-height:250px;}
  .mosaic-caption{padding:16px;}
  .mosaic-caption h3{font-size:16px;}
  .spec-figure{min-height:260px;margin-bottom:24px;}
  .flow-band{padding:6px 20px;}
  .flow-step{gap:14px;}
  .faq-item{padding:0 18px;}
  .faq-answer{padding-left:0;}
  .cta-band{padding:28px 20px;}
  .cta-band .btn{width:100%;}
  .site-footer{padding-top:48px;margin-top:64px;}
  .footer-desc{max-width:none;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:479px){
  .container{padding:0 16px;}
  .brand-text{font-size:15px;}
  .databar.brand-mix,
  .databar.accent-mix{grid-template-columns:1fr;}
  .databar-cell{border-right:0;border-bottom:1px dashed rgba(35,224,196,.15);}
  .databar-cell:last-child{border-bottom:0;}
  .hero-stat strong{font-size:20px;}
}

/* roulang page: category3 */
:root{
  --bg-deep:#061318;
  --bg-panel:#0B2028;
  --glass:rgba(18,46,56,0.55);
  --line:rgba(35,224,196,0.18);
  --brand:#23E0C4;
  --brand-deep:#0FA88F;
  --accent:#FF8A3D;
  --text-hi:#EAF6F4;
  --text-mid:#9DB6B6;
  --text-low:#64807F;
  --radius-card:18px;
  --radius-glass:20px;
  --radius-pill:999px;
  --shadow:0 18px 40px rgba(0,0,0,.45);
  --container:1200px;
  --ease:160ms ease-out;
}

*,*::before,*::after{box-sizing:border-box;}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}

body{
  margin:0;
  font-family:"HarmonyOS Sans","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text-hi);
  background-color:var(--bg-deep);
  background-image:
    radial-gradient(900px 520px at 78% 100%, rgba(35,224,196,0.13), transparent 62%),
    radial-gradient(700px 420px at 6% 8%, rgba(255,138,61,0.06), transparent 60%),
    linear-gradient(rgba(35,224,196,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(35,224,196,0.045) 1px, transparent 1px);
  background-size:auto, auto, 100% 64px, 64px 100%;
  background-attachment:fixed;
  overflow-x:hidden;
}

img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
a:hover{color:var(--brand);}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input{font:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
p{margin:0 0 16px;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-0.01em;line-height:1.35;}

:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}

/* ---------- Header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(6,19,24,0.86);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{
  display:flex;
  align-items:center;
  gap:22px;
  min-height:72px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  color:var(--text-hi);
}
.brand:hover{color:var(--text-hi);}
.brand-mark{
  width:36px;
  height:36px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:12px;
  background:rgba(35,224,196,0.10);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.brand-mark svg{width:22px;height:22px;}
.brand-text{
  font-size:17px;
  font-weight:700;
  letter-spacing:0.01em;
  white-space:nowrap;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:8px;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 12px;
  font-size:15px;
  color:var(--text-mid);
  border-radius:10px;
  transition:color var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:8px;
  height:2px;
  border-radius:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform var(--ease);
}
.nav-link:hover{color:var(--text-hi);}
.nav-link.is-active{color:var(--text-hi);}
.nav-link.is-active::after{transform:scaleX(1);}
.nav-tools{
  display:flex;
  align-items:center;
  gap:14px;
  margin-left:auto;
}
.search-box{
  display:flex;
  align-items:center;
  gap:8px;
  height:42px;
  padding:0 16px;
  border-radius:var(--radius-pill);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  transition:border-color var(--ease),box-shadow var(--ease);
}
.search-box i{color:var(--text-low);font-size:13px;}
.search-box input{
  width:190px;
  border:0;
  background:transparent;
  color:var(--text-hi);
  font-size:14px;
  outline:none;
}
.search-box input::placeholder{color:var(--text-low);}
.search-box:focus-within{
  border-color:rgba(35,224,196,.55);
  box-shadow:0 0 0 3px rgba(35,224,196,.14);
}
.link-login{
  font-size:15px;
  color:var(--text-mid);
  transition:color var(--ease);
  padding:10px 2px;
}
.link-login:hover{color:var(--text-hi);}
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  border-radius:12px;
  border:1px solid var(--line);
  background:var(--glass);
  color:var(--text-hi);
  align-items:center;
  justify-content:center;
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:0 24px;
  border-radius:var(--radius-pill);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:var(--brand);
  color:#04201C;
  box-shadow:0 8px 28px rgba(35,224,196,.28);
}
.btn-primary:hover{
  background:#2CF0D2;
  color:#04201C;
  transform:translateY(-2px);
  box-shadow:0 14px 34px rgba(35,224,196,.36);
}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 18px rgba(35,224,196,.24);}
.btn-outline{
  background:transparent;
  color:var(--text-hi);
  border-color:rgba(35,224,196,.45);
}
.btn-outline:hover{
  color:var(--text-hi);
  border-color:var(--brand);
  background:rgba(35,224,196,.08);
  transform:translateY(-2px);
}
.btn-outline:active{transform:translateY(0);}
.btn-ghost{
  padding:0 4px;
  min-height:44px;
  color:var(--brand);
  background:none;
}
.btn-ghost:hover{color:#6BFAE2;}
.btn-ghost i{transition:transform var(--ease);}
.btn-ghost:hover i{transform:translateX(4px);}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}

/* ---------- Section basics ---------- */
.section{padding:88px 0;}
.section-tight{padding:64px 0;}
.section-head{max-width:760px;margin-bottom:40px;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-bottom:14px;
  padding:6px 14px;
  border-radius:var(--radius-pill);
  font-size:13px;
  letter-spacing:0.06em;
  color:var(--brand);
  background:rgba(35,224,196,.10);
  border:1px solid var(--line);
}
.section-title{font-size:clamp(22px,3vw,32px);margin-bottom:14px;}
.section-desc{
  font-size:15px;
  color:var(--text-mid);
  margin:0;
}
.glass-card{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-glass);
  box-shadow:var(--shadow);
  box-shadow:var(--shadow), inset 0 1px 0 rgba(255,255,255,.06);
}

/* ---------- Page hero ---------- */
.page-hero{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.page-hero-bg{
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-3.png');
  background-size:cover;
  background-position:center;
  opacity:.32;
}
.page-hero-bg::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(100deg, rgba(6,19,24,.96) 12%, rgba(6,19,24,.78) 52%, rgba(6,19,24,.45) 100%);
}
.page-hero-inner{
  position:relative;
  padding:74px 0 78px;
}
.crumbs{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--text-low);
  margin-bottom:22px;
}
.crumbs a:hover{color:var(--brand);}
.crumbs span{color:var(--text-mid);}
.page-hero h1{
  font-size:clamp(30px,5vw,54px);
  font-weight:700;
  letter-spacing:-0.02em;
  max-width:900px;
  margin-bottom:20px;
}
.page-hero .lead{
  max-width:660px;
  font-size:16px;
  color:var(--text-mid);
  margin-bottom:26px;
}
.hero-points{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}
.hero-points li{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 16px;
  border-radius:var(--radius-pill);
  font-size:14px;
  color:var(--text-mid);
  background:var(--glass);
  border:1px solid var(--line);
}
.hero-points i{color:var(--brand);font-size:12px;}

/* ---------- Docs layout ---------- */
.docs-layout{margin-top:0;}
.docs-aside{position:relative;}
.anchor-card{
  position:sticky;
  top:96px;
  padding:22px;
  border-radius:var(--radius-glass);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow), inset 0 1px 0 rgba(255,255,255,.06);
}
.anchor-title{
  font-size:12px;
  letter-spacing:0.14em;
  color:var(--text-low);
  margin:0 0 14px;
}
.anchor-nav{display:flex;flex-direction:column;gap:2px;}
.anchor-nav a{
  position:relative;
  display:block;
  padding:10px 12px 10px 16px;
  font-size:14.5px;
  color:var(--text-mid);
  border-radius:10px;
  transition:color var(--ease),background var(--ease);
}
.anchor-nav a::before{
  content:"";
  position:absolute;
  left:0;
  top:12px;
  bottom:12px;
  width:2px;
  border-radius:2px;
  background:transparent;
  transition:background var(--ease);
}
.anchor-nav a:hover{color:var(--text-hi);background:rgba(35,224,196,.06);}
.anchor-nav a.is-current{color:var(--brand);background:rgba(35,224,196,.08);}
.anchor-nav a.is-current::before{background:var(--brand);}
.aside-tip{
  margin-top:18px;
  padding:16px;
  border-radius:14px;
  background:rgba(255,138,61,.08);
  border:1px solid rgba(255,138,61,.22);
  font-size:13.5px;
  line-height:1.7;
  color:var(--text-mid);
}
.aside-tip strong{color:var(--accent);display:block;margin-bottom:6px;font-size:13px;}

.docs-body{display:flex;flex-direction:column;gap:22px;}
.doc-card{
  padding:30px 32px;
  border-radius:var(--radius-glass);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow), inset 0 1px 0 rgba(255,255,255,.06);
  scroll-margin-top:96px;
}
.doc-card h2{
  font-size:21px;
  margin-bottom:14px;
  display:flex;
  align-items:center;
  gap:12px;
}
.doc-index{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:34px;
  height:28px;
  padding:0 10px;
  border-radius:var(--radius-pill);
  font-size:13px;
  font-variant-numeric:tabular-nums;
  letter-spacing:0.06em;
  color:var(--accent);
  background:rgba(255,138,61,.12);
  border:1px solid rgba(255,138,61,.24);
}
.doc-card h3{
  font-size:17px;
  margin:26px 0 10px;
  color:var(--text-hi);
}
.doc-card p{font-size:15px;color:var(--text-mid);}
.doc-card strong{color:var(--text-hi);}
.doc-list{display:flex;flex-direction:column;gap:10px;margin:14px 0 6px;}
.doc-list li{
  position:relative;
  padding-left:22px;
  font-size:15px;
  color:var(--text-mid);
}
.doc-list li::before{
  content:"";
  position:absolute;
  left:2px;
  top:12px;
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--brand);
  box-shadow:0 0 10px rgba(35,224,196,.7);
}
.doc-table{
  width:100%;
  border-collapse:collapse;
  margin:18px 0 6px;
  font-size:14.5px;
  background:rgba(11,32,40,.6);
  border:1px solid var(--line);
  border-radius:14px;
  overflow:hidden;
}
.doc-table th{
  text-align:left;
  padding:13px 16px;
  color:var(--text-hi);
  font-weight:600;
  border-bottom:1px solid rgba(35,224,196,.35);
  background:rgba(35,224,196,.07);
}
.doc-table td{
  padding:12px 16px;
  color:var(--text-mid);
  border-bottom:1px solid rgba(35,224,196,.10);
  font-variant-numeric:tabular-nums;
}
.doc-table tr:last-child td{border-bottom:0;}
.doc-note{
  margin-top:18px;
  padding:14px 18px;
  border-left:3px solid var(--brand);
  border-radius:0 12px 12px 0;
  background:rgba(35,224,196,.07);
  font-size:14px;
  color:var(--text-mid);
}
.doc-figure{
  margin:20px 0 6px;
  border-radius:14px;
  overflow:hidden;
  border:1px solid var(--line);
}
.doc-figure img{
  width:100%;
  height:230px;
  object-fit:cover;
}
.doc-figure figcaption{
  padding:12px 16px;
  font-size:13px;
  color:var(--text-low);
  background:rgba(11,32,40,.7);
}

/* ---------- Data strip ---------- */
.data-strip{
  display:grid;
  grid-template-columns:1.1fr 1fr 1fr 0.9fr;
  gap:1px;
  overflow:hidden;
  border-radius:var(--radius-glass);
  background:var(--line);
  border:1px solid var(--line);
}
.data-item{
  padding:26px 24px;
  background:linear-gradient(180deg, rgba(11,32,40,.95), rgba(6,19,24,.95));
}
.data-item .num{
  display:block;
  font-size:clamp(26px,3.4vw,38px);
  font-weight:700;
  letter-spacing:0.02em;
  font-variant-numeric:tabular-nums;
  line-height:1.2;
  margin-bottom:6px;
}
.num-cyan{color:var(--brand);}
.num-orange{color:var(--accent);}
.data-item small{
  display:block;
  font-size:13.5px;
  color:var(--text-low);
}

/* ---------- FAQ ---------- */
.faq-wrap{display:flex;flex-direction:column;gap:12px;max-width:920px;}
.faq-item{
  border-radius:14px;
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  overflow:hidden;
  transition:border-color var(--ease),background var(--ease);
}
.faq-item[open]{
  border-color:rgba(35,224,196,.42);
  background:rgba(18,46,56,.72);
}
.faq-item summary{
  position:relative;
  display:flex;
  align-items:center;
  gap:14px;
  padding:18px 22px 18px 24px;
  font-size:17px;
  font-weight:600;
  color:var(--text-hi);
  cursor:pointer;
  list-style:none;
  transition:color var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::before{
  content:"";
  position:absolute;
  left:0;
  top:14px;
  bottom:14px;
  width:3px;
  border-radius:0 3px 3px 0;
  background:transparent;
  transition:background var(--ease);
}
.faq-item[open] summary::before{background:var(--brand);box-shadow:0 0 12px rgba(35,224,196,.7);}
.faq-item summary:hover{color:var(--brand);}
.faq-item summary .faq-ico{
  margin-left:auto;
  color:var(--text-low);
  font-size:14px;
  transition:transform var(--ease),color var(--ease);
}
.faq-item[open] summary .faq-ico{transform:rotate(45deg);color:var(--brand);}
.faq-answer{
  padding:0 24px 22px 24px;
  font-size:15px;
  color:var(--text-mid);
}
.faq-answer p{margin:0;}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  padding:52px 44px;
  border-radius:var(--radius-glass);
  background:linear-gradient(120deg, rgba(35,224,196,.13), rgba(11,32,40,.9) 55%);
  border:1px solid var(--line);
  box-shadow:var(--shadow), inset 0 1px 0 rgba(255,255,255,.06);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:30px;
  flex-wrap:wrap;
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-60px;
  top:-80px;
  width:280px;
  height:280px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(35,224,196,.30), transparent 68%);
  pointer-events:none;
}
.cta-band h2{
  font-size:clamp(20px,2.6vw,28px);
  margin-bottom:8px;
  position:relative;
}
.cta-band p{
  margin:0;
  font-size:15px;
  color:var(--text-mid);
  position:relative;
  max-width:620px;
}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;position:relative;}

/* ---------- Footer ---------- */
.site-footer{
  margin-top:20px;
  padding:72px 0 0;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg, rgba(11,32,40,.4), rgba(6,19,24,.96));
}
.footer-grid{padding-bottom:48px;}
.footer-col{margin-bottom:32px;}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:16px;
}
.footer-brand .brand-text{font-size:16px;}
.footer-desc{
  font-size:14px;
  color:var(--text-mid);
  max-width:360px;
  line-height:1.8;
}
.footer-title{
  font-size:14px;
  font-weight:700;
  letter-spacing:0.08em;
  color:var(--text-hi);
  margin:0 0 16px;
}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--text-mid);
  transition:color var(--ease),transform var(--ease);
}
.footer-links a i{font-size:10px;color:var(--brand);opacity:.7;}
.footer-links a:hover{color:var(--brand);transform:translateX(3px);}
.footer-contact{display:flex;flex-direction:column;gap:12px;}
.footer-contact li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:14px;
  color:var(--text-mid);
}
.footer-contact i{color:var(--brand);margin-top:5px;font-size:13px;}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--text-low);
}
.footer-bottom a{color:var(--text-low);}
.footer-bottom a:hover{color:var(--brand);}

/* ---------- Back to top ---------- */
.to-top{
  position:fixed;
  right:24px;
  bottom:28px;
  width:46px;
  height:46px;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(18,46,56,.85);
  border:1px solid var(--line);
  color:var(--brand);
  box-shadow:var(--shadow);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease);
  z-index:70;
}
.to-top.is-on{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:rgba(35,224,196,.16);}

/* ---------- Foundation overrides ---------- */
.button,button.button{background:var(--brand);color:#04201C;border-radius:var(--radius-pill);}
.grid-margin-x{margin-left:-11px;margin-right:-11px;}
.grid-margin-x>.cell{padding-left:11px;padding-right:11px;}

/* ---------- Responsive ---------- */
@media screen and (max-width:1023px){
  .search-box{display:none;}
  .main-nav{
    position:absolute;
    top:72px;
    left:0;
    right:0;
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    padding:14px 20px 22px;
    background:rgba(6,19,24,.98);
    border-bottom:1px solid var(--line);
    box-shadow:var(--shadow);
    display:none;
  }
  .main-nav.is-open{display:flex;}
  .nav-link{
    padding:14px 6px;
    font-size:16px;
    letter-spacing:0.02em;
    border-bottom:1px solid rgba(35,224,196,.08);
  }
  .nav-link::after{display:none;}
  .nav-link.is-active{color:var(--brand);}
  .nav-toggle{display:inline-flex;}
  .nav-tools .link-login{display:none;}
  .docs-aside .anchor-card{position:static;margin-bottom:22px;}
  .anchor-nav{
    flex-direction:row;
    overflow-x:auto;
    gap:10px;
    padding-bottom:6px;
    scrollbar-width:none;
  }
  .anchor-nav::-webkit-scrollbar{display:none;}
  .anchor-nav a{
    flex:0 0 auto;
    padding:9px 16px;
    border-radius:var(--radius-pill);
    border:1px solid var(--line);
    background:rgba(11,32,40,.6);
    white-space:nowrap;
  }
  .anchor-nav a::before{display:none;}
  .anchor-title{display:none;}
  .data-strip{grid-template-columns:1fr 1fr;}
  .section{padding:64px 0;}
  .doc-card{padding:26px 24px;}
}

@media screen and (max-width:767px){
  body{line-height:1.9;}
  .nav-wrap{min-height:66px;gap:14px;}
  .brand-text{font-size:15.5px;}
  .nav-tools{gap:10px;}
  .nav-tools .btn-sm{padding:0 14px;font-size:13px;}
  .main-nav{top:66px;}
  .page-hero-inner{padding:52px 0 56px;}
  .page-hero .lead{font-size:15px;}
  .hero-points li{font-size:13px;padding:7px 13px;}
  .section{padding:48px 0;}
  .data-strip{grid-template-columns:1fr;}
  .doc-card{padding:22px 18px;}
  .doc-card h2{font-size:19px;}
  .faq-item summary{font-size:16px;padding:16px 18px 16px 20px;}
  .faq-answer{padding:0 18px 18px 20px;}
  .cta-band{padding:34px 22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .doc-table{font-size:13.5px;}
  .doc-table th,.doc-table td{padding:10px 12px;}
  .to-top{right:16px;bottom:18px;}
}

@media screen and (max-width:519px){
  .container{padding-left:16px;padding-right:16px;}
  .search-box input{width:110px;}
  .doc-figure img{height:170px;}
}