/* roulang page: index */
/* ========== 设计变量 ========== */
:root{
  --primary:#0B1D3A;
  --primary-2:#1B3A66;
  --accent:#00D4FF;
  --secondary:#4C7CF3;
  --success:#2EE6A8;
  --warning:#FFC24B;
  --error:#FF5C7A;
  --bg-start:#081226;
  --bg-end:#0F243E;
  --panel:#0D1F38;
  --text-1:#F0F6FF;
  --text-2:#A8B8D0;
  --text-3:#5E7391;
  --text-disabled:#3A4760;
  --glass-bg:rgba(255,255,255,0.04);
  --glass-border:rgba(0,212,255,0.16);
  --line:rgba(255,255,255,0.06);
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:8px;
  --shadow-card:0 8px 32px rgba(0,0,0,0.35);
  --shadow-hover:0 16px 48px rgba(0,0,0,0.5), 0 0 0 1px rgba(0,212,255,0.2);
  --shadow-glow:0 0 24px rgba(0,212,255,0.25);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-num:"DIN Alternate","Bahnschrift",system-ui;
  --gap:96px;
}
/* ========== Reset / Base ========== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-cn);
  font-size:15px;
  line-height:1.8;
  letter-spacing:0.01em;
  color:var(--text-2);
  background:radial-gradient(ellipse at 20% 0%,var(--bg-end),var(--bg-start) 70%);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--accent);text-decoration:none;transition:all 0.3s ease}
a:focus-visible,button:focus-visible,input:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
h1,h2,h3,h4{color:var(--text-1);letter-spacing:0.02em;line-height:1.3}
/* ========== 布局工具 ========== */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media(max-width:768px){
  .container{padding:0 16px}
}
.section-head{
  display:flex;
  align-items:center;
  gap:16px;
  margin-bottom:40px;
}
.section-line{
  display:block;
  width:4px;
  height:24px;
  background:var(--accent);
  border-radius:2px;
  box-shadow:0 0 12px rgba(0,212,255,0.5);
  flex-shrink:0;
}
.section-head h2{font-size:32px;font-weight:600}
.section-head .more-link{
  margin-left:auto;
  font-size:14px;
  color:var(--accent);
  display:flex;
  align-items:center;
  gap:6px;
  white-space:nowrap;
}
.section-head .more-link:hover{transform:translateX(4px)}
@media(max-width:768px){
  .section-head{margin-bottom:24px}
  .section-head h2{font-size:22px}
}
/* ========== 按钮 ========== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:12px 28px;
  border-radius:var(--radius-sm);
  font-size:14px;
  font-weight:500;
  line-height:1.4;
  transition:all 0.3s ease;
  text-align:center;
  letter-spacing:0.02em;
  min-height:44px;
}
.btn-primary{
  background:linear-gradient(135deg,var(--accent),var(--secondary));
  color:#fff;
  box-shadow:0 0 24px rgba(0,212,255,0.35);
  border:none;
}
.btn-primary:hover{
  box-shadow:0 0 40px rgba(0,212,255,0.55);
  filter:brightness(1.1);
  transform:translateY(-2px);
}
.btn-primary:active{transform:scale(0.97)}
.btn-ghost{
  background:transparent;
  border:1px solid rgba(0,212,255,0.4);
  color:var(--accent);
}
.btn-ghost:hover{
  background:rgba(0,212,255,0.08);
  box-shadow:var(--shadow-glow);
  transform:translateY(-2px);
}
.btn-ghost:active{transform:scale(0.97)}
.btn-sm{
  padding:8px 20px;
  font-size:13px;
  min-height:40px;
}
/* ========== 顶部导航 ========== */
.site-header{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  z-index:1000;
  background:rgba(8,18,38,0.8);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(0,212,255,0.25);
}
.header-inner{
  display:flex;
  align-items:center;
  height:72px;
  gap:32px;
}
.logo{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.logo-icon{
  width:36px;
  height:36px;
  border-radius:10px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:linear-gradient(135deg,var(--accent),var(--secondary));
  box-shadow:0 0 16px rgba(0,212,255,0.4);
  color:#fff;
  font-size:18px;
}
.logo-text{
  font-size:20px;
  font-weight:700;
  color:var(--text-1);
  letter-spacing:0.02em;
  white-space:nowrap;
}
.logo-text .logo-accent{
  color:var(--accent);
  font-weight:700;
}
.main-nav{
  display:flex;
  gap:6px;
  margin-left:auto;
}
.main-nav a{
  display:inline-flex;
  align-items:center;
  padding:8px 18px;
  color:var(--text-2);
  font-size:15px;
  font-weight:500;
  border-radius:var(--radius-sm);
  position:relative;
  transition:all 0.3s ease;
  min-height:44px;
}
.main-nav a:hover{
  color:var(--accent);
  background:rgba(0,212,255,0.06);
}
.main-nav a.active{
  color:var(--accent);
}
.main-nav a.active::after{
  content:"";
  position:absolute;
  left:18px;
  right:18px;
  bottom:2px;
  height:2px;
  background:var(--accent);
  border-radius:2px;
  box-shadow:0 0 8px rgba(0,212,255,0.6);
}
.header-right{
  display:flex;
  align-items:center;
  gap:16px;
}
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  border-radius:8px;
  color:var(--text-1);
  font-size:20px;
  align-items:center;
  justify-content:center;
  border:1px solid rgba(255,255,255,0.1);
  background:rgba(255,255,255,0.04);
  transition:all 0.3s ease;
}
.nav-toggle:hover{background:rgba(0,212,255,0.1);border-color:var(--accent)}
/* 移动端抽屉 */
.mobile-drawer{
  display:none;
  position:fixed;
  top:0;
  right:-100%;
  width:100%;
  height:100vh;
  background:rgba(8,18,38,0.96);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  z-index:1001;
  padding:80px 32px 40px;
  flex-direction:column;
  transition:right 0.4s ease;
}
.mobile-drawer.open{right:0}
.mobile-drawer a{
  font-size:20px;
  color:var(--text-1);
  padding:12px 0;
  line-height:48px;
  border-bottom:1px solid rgba(255,255,255,0.06);
}
.mobile-drawer a:hover,.mobile-drawer a.active{color:var(--accent)}
.drawer-close{
  position:absolute;
  top:18px;
  right:20px;
  width:44px;
  height:44px;
  color:var(--text-1);
  font-size:22px;
  border-radius:8px;
  border:1px solid rgba(255,255,255,0.1);
  display:flex;
  align-items:center;
  justify-content:center;
}
.drawer-close:hover{border-color:var(--accent);color:var(--accent)}
.drawer-cta{
  margin-top:32px;
  text-align:center;
}
@media(max-width:768px){
  .header-right .btn{display:none}
  .main-nav{display:none}
  .nav-toggle{display:flex}
  .mobile-drawer{display:flex}
  .header-inner{height:64px}
}
/* ========== Hero 首屏 ========== */
.hero{
  position:relative;
  padding:160px 0 80px;
  background:linear-gradient(rgba(8,18,38,0.85),rgba(15,36,62,0.92)),url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(0,212,255,0.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(0,212,255,0.06) 1px,transparent 1px);
  background-size:36px 36px;
  pointer-events:none;
}
.hero::after{
  content:"";
  position:absolute;
  top:-120px;
  right:-120px;
  width:420px;
  height:420px;
  background:radial-gradient(circle,rgba(0,212,255,0.2),transparent 60%);
  border-radius:50%;
  pointer-events:none;
  animation:glowDrift 8s ease-in-out infinite alternate;
}
@keyframes glowDrift{
  0%{transform:translate(0,0) scale(1)}
  100%{transform:translate(-40px,20px) scale(1.15)}
}
.hero-grid{
  display:grid;
  grid-template-columns:3fr 2fr;
  gap:60px;
  align-items:center;
  position:relative;
  z-index:1;
}
.hero-content h1{
  font-size:48px;
  font-weight:700;
  line-height:1.15;
  margin-bottom:24px;
  color:var(--text-1);
}
.hero-content h1 .hl{
  background:linear-gradient(90deg,#fff,var(--accent));
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
.hero-sub{
  font-size:16px;
  color:var(--text-2);
  margin-bottom:36px;
  letter-spacing:0.04em;
}
.hero-btns{
  display:flex;
  gap:16px;
  flex-wrap:wrap;
  margin-bottom:48px;
}
.hero-badges{
  display:flex;
  gap:24px;
  flex-wrap:wrap;
}
.hero-badges span{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--text-2);
  background:rgba(255,255,255,0.04);
  border:1px solid rgba(255,255,255,0.08);
  padding:8px 16px;
  border-radius:999px;
}
.hero-badges i{
  color:var(--accent);
  font-size:15px;
}
/* 状态面板 */
.hero-panel{
  background:rgba(255,255,255,0.04);
  border:1px solid var(--glass-border);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-radius:var(--radius-lg);
  padding:32px 28px;
  box-shadow:var(--shadow-card);
  position:relative;
  overflow:hidden;
}
.hero-panel::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,0.15),transparent);
}
.status-panel h3{
  font-size:18px;
  font-weight:600;
  margin-bottom:24px;
  display:flex;
  align-items:center;
  gap:10px;
}
.status-panel h3 i{
  color:var(--accent);
}
.status-row{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:14px 0;
  border-bottom:1px solid var(--line);
}
.status-row:last-of-type{border-bottom:none}
.status-row span{font-size:14px;color:var(--text-2)}
.status-row .status-ok{
  color:var(--success);
  font-weight:600;
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.status-row .status-ok::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--success);
  box-shadow:0 0 8px var(--success);
}
.progress-bar{
  margin-top:20px;
  height:4px;
  background:rgba(255,255,255,0.08);
  border-radius:2px;
  overflow:hidden;
}
.progress-fill{
  height:100%;
  background:linear-gradient(90deg,var(--accent),var(--secondary));
  border-radius:2px;
  box-shadow:0 0 8px rgba(0,212,255,0.5);
}
@media(max-width:1024px){
  .hero-grid{grid-template-columns:1fr 1fr;gap:40px}
}
@media(max-width:768px){
  .hero{padding:120px 0 48px}
  .hero-grid{grid-template-columns:1fr}
  .hero-content h1{font-size:28px}
  .hero-sub{font-size:14px}
  .hero-badges{flex-direction:column;align-items:flex-start}
  .hero-panel{order:2;margin-top:8px}
}
/* ========== 入口亮点 ========== */
.features{
  padding:var(--gap) 0;
  background:linear-gradient(180deg,transparent,rgba(13,31,56,0.4));
}
.feature-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.feature-card{
  background:var(--glass-bg);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);
  padding:32px 28px;
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  transition:all 0.3s ease;
  position:relative;
  overflow:hidden;
}
.feature-card::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,0.15),transparent);
}
.feature-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(0,212,255,0.4);
}
.feature-icon{
  width:56px;
  height:56px;
  border-radius:14px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:28px;
  color:var(--accent);
  background:rgba(0,212,255,0.1);
  margin-bottom:20px;
  border:1px solid rgba(0,212,255,0.2);
}
.feature-card h3{
  font-size:20px;
  font-weight:600;
  margin-bottom:12px;
}
.feature-card p{
  font-size:14px;
  color:var(--text-2);
  line-height:1.7;
  margin-bottom:20px;
}
.feature-status{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--success);
  background:rgba(46,230,168,0.08);
  padding:6px 14px;
  border-radius:999px;
}
.feature-status::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--success);
  box-shadow:0 0 6px var(--success);
}
@media(max-width:1024px){
  .feature-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .feature-grid{grid-template-columns:1fr}
  .feature-card{padding:24px 20px}
  .feature-card h3{font-size:17px}
}
/* ========== 奖励预览 ========== */
.rewards{
  padding:var(--gap) 0;
  background:var(--panel);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.rewards-grid{
  display:grid;
  grid-template-columns:2fr 1fr;
  gap:24px;
  align-items:stretch;
}
.reward-card-lg{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--glass-border);
  box-shadow:var(--shadow-card);
  min-height:320px;
  display:flex;
  align-items:flex-end;
  background:linear-gradient(180deg,rgba(0,0,0,0.1),rgba(0,0,0,0.6)),url('/assets/images/coverpic/cover-1.png') center/cover no-repeat;
}
.reward-lg-body{
  padding:32px;
  width:100%;
  background:linear-gradient(180deg,transparent,rgba(8,18,38,0.9));
}
.reward-lg-body h3{
  font-size:24px;
  font-weight:600;
  color:#fff;
  margin-bottom:8px;
}
.reward-lg-body .reward-tags{
  display:flex;
  gap:10px;
  align-items:center;
  flex-wrap:wrap;
}
.rewards-side{
  display:flex;
  flex-direction:column;
  gap:24px;
}
.reward-card-sm{
  background:var(--glass-bg);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);
  padding:24px;
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:all 0.3s ease;
  flex:1;
  display:flex;
  flex-direction:column;
  justify-content:center;
}
.reward-card-sm:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
}
.reward-card-sm h4{
  font-size:17px;
  font-weight:600;
  margin-bottom:6px;
}
.reward-card-sm p{
  font-size:13px;
  color:var(--text-3);
  margin-bottom:12px;
}
.reward-tag{
  display:inline-block;
  background:rgba(0,212,255,0.12);
  color:var(--accent);
  font-size:13px;
  padding:4px 14px;
  border-radius:999px;
  font-weight:500;
}
.reward-time{
  font-size:13px;
  color:var(--text-3);
  display:flex;
  align-items:center;
  gap:6px;
  margin-top:10px;
}
.reward-time i{color:var(--warning)}
@media(max-width:1024px){
  .rewards-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .rewards-grid{grid-template-columns:1fr}
  .reward-card-lg{min-height:240px}
  .reward-lg-body{padding:20px}
  .reward-lg-body h3{font-size:18px}
}
/* ========== 登陆旅程 ========== */
.journey{
  padding:var(--gap) 0;
}
.steps-wrap{
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
  padding-bottom:12px;
}
.steps-wrap::-webkit-scrollbar{display:none}
.steps{
  display:flex;
  gap:0;
  min-width:720px;
  position:relative;
  margin-bottom:40px;
}
.step{
  flex:1;
  display:flex;
  flex-direction:column;
  align-items:center;
  position:relative;
  text-align:center;
}
.step::before{
  content:"";
  position:absolute;
  top:20px;
  left:50%;
  width:100%;
  height:2px;
  background:linear-gradient(90deg,rgba(0,212,255,0.4),rgba(255,255,255,0.1));
  z-index:0;
}
.step:first-child::before{
  background:linear-gradient(90deg,transparent,rgba(0,212,255,0.4));
}
.step:last-child::before{
  background:linear-gradient(90deg,rgba(0,212,255,0.4),transparent);
}
.step-dot{
  width:40px;
  height:40px;
  border-radius:50%;
  background:var(--panel);
  border:2px solid rgba(255,255,255,0.2);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:14px;
  color:var(--text-3);
  position:relative;
  z-index:1;
  font-family:var(--font-num);
  margin-bottom:12px;
  transition:all 0.3s ease;
}
.step.done .step-dot{
  background:var(--accent);
  border-color:var(--accent);
  color:#fff;
  box-shadow:0 0 16px rgba(0,212,255,0.5);
}
.step.current .step-dot{
  border-color:var(--accent);
  background:rgba(0,212,255,0.1);
  color:var(--accent);
  box-shadow:0 0 0 4px rgba(0,212,255,0.15);
  animation:pulseRing 2s ease-in-out infinite;
}
@keyframes pulseRing{
  0%,100%{box-shadow:0 0 0 3px rgba(0,212,255,0.2)}
  50%{box-shadow:0 0 0 8px rgba(0,212,255,0.1)}
}
.step-label{
  font-size:13px;
  color:var(--text-2);
  max-width:90px;
}
.task-panel{
  display:flex;
  justify-content:space-between;
  align-items:center;
  background:var(--glass-bg);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);
  padding:28px 32px;
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  flex-wrap:wrap;
  gap:16px;
}
.task-panel h4{
  font-size:18px;
  font-weight:600;
  margin-bottom:4px;
}
.task-panel p{
  font-size:14px;
  color:var(--text-3);
}
@media(max-width:768px){
  .steps{min-width:620px}
  .task-panel{flex-direction:column;align-items:flex-start;padding:20px}
}
/* ========== 资讯列表 ========== */
.news{
  padding:var(--gap) 0;
  background:linear-gradient(180deg,transparent,rgba(13,31,56,0.5));
}
.news-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.news-card{
  background:var(--glass-bg);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);
  overflow:hidden;
  transition:all 0.3s ease;
  display:flex;
  flex-direction:column;
}
.news-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(0,212,255,0.4);
}
.news-cover{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  display:block;
}
.news-cover img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform 0.4s ease;
}
.news-card:hover .news-cover img{transform:scale(1.05)}
.news-cover::after{
  content:"开云";
  position:absolute;
  bottom:8px;
  right:12px;
  font-size:13px;
  color:rgba(255,255,255,0.5);
  background:linear-gradient(135deg,rgba(0,212,255,0.3),rgba(76,124,243,0.3));
  padding:2px 10px;
  border-radius:999px;
  letter-spacing:0.1em;
}
.news-body{
  padding:20px 22px 18px;
  display:flex;
  flex-direction:column;
  flex:1;
}
.news-cat{
  display:inline-block;
  background:rgba(255,255,255,0.08);
  color:var(--text-2);
  font-size:13px;
  padding:4px 12px;
  border-radius:999px;
  margin-bottom:12px;
  align-self:flex-start;
}
.news-body h3{
  font-size:18px;
  font-weight:600;
  line-height:1.4;
  margin-bottom:10px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-body h3 a{color:var(--text-1)}
.news-body h3 a:hover{color:var(--accent)}
.news-body p{
  font-size:14px;
  color:var(--text-2);
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  margin-bottom:16px;
  flex:1;
}
.news-meta{
  display:flex;
  justify-content:space-between;
  align-items:center;
  border-top:1px solid var(--line);
  padding-top:14px;
}
.news-meta time{
  font-size:13px;
  color:var(--text-3);
  font-family:var(--font-num);
}
.news-meta a{
  font-size:13px;
  color:var(--accent);
  display:inline-flex;
  align-items:center;
  gap:4px;
}
.news-meta a:hover{gap:8px}
.news-empty{
  grid-column:1/-1;
  text-align:center;
  padding:60px 20px;
}
.empty-icon{
  width:88px;
  height:88px;
  border-radius:50%;
  border:2px dashed rgba(0,212,255,0.4);
  display:flex;
  align-items:center;
  justify-content:center;
  margin:0 auto 20px;
  font-size:32px;
  color:var(--accent);
}
.news-empty p{
  color:var(--text-2);
  font-size:15px;
}
.news-empty .empty-sub{
  color:var(--text-3);
  font-size:13px;
  margin-top:6px;
}
.news-more{
  text-align:center;
  margin-top:40px;
}
.news-more a{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--accent);
  font-size:14px;
  padding:12px 28px;
  border:1px solid rgba(0,212,255,0.3);
  border-radius:var(--radius-sm);
  transition:all 0.3s ease;
}
.news-more a:hover{
  background:rgba(0,212,255,0.08);
  box-shadow:var(--shadow-glow);
}
@media(max-width:1024px){
  .news-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .news-grid{grid-template-columns:1fr}
  .news-body{padding:16px}
  .news-body h3{font-size:16px}
}
/* ========== FAQ 常见问题 ========== */
.faq{
  padding:var(--gap) 0;
  background:var(--panel);
  border-top:1px solid var(--line);
}
.faq-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
  max-width:1000px;
  margin:0 auto;
}
.faq-item{
  background:var(--glass-bg);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-md);
  overflow:hidden;
  transition:all 0.3s ease;
}
.faq-item:hover{
  border-color:rgba(0,212,255,0.3);
}
.faq-item[open]{
  box-shadow:var(--shadow-card);
  border-color:rgba(0,212,255,0.4);
}
.faq-q{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  padding:20px 24px;
  cursor:pointer;
  list-style:none;
  font-size:17px;
  font-weight:500;
  color:var(--text-1);
  font-family:inherit;
  transition:all 0.3s ease;
  min-height:56px;
}
.faq-q::-webkit-details-marker{display:none}
.faq-q:hover{color:var(--accent)}
.faq-q i{
  color:var(--accent);
  transition:transform 0.3s ease;
  flex-shrink:0;
}
.faq-item[open] .faq-q i{
  transform:rotate(180deg);
}
.faq-a{
  padding:0 24px 20px;
  border-top:1px solid var(--line);
  font-size:14px;
  color:var(--text-2);
  line-height:1.8;
}
.faq-a p{
  padding-top:16px;
}
@media(max-width:768px){
  .faq-grid{grid-template-columns:1fr}
  .faq-q{font-size:16px;padding:16px 18px}
}
/* ========== CTA 区 ========== */
.cta-section{
  padding:var(--gap) 0;
}
.cta-panel{
  background:linear-gradient(135deg,rgba(0,212,255,0.08),rgba(76,124,243,0.05)),var(--glass-bg);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);
  padding:60px 40px;
  text-align:center;
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  position:relative;
  overflow:hidden;
}
.cta-panel::before{
  content:"";
  position:absolute;
  top:0;
  left:50%;
  transform:translateX(-50%);
  width:200px;
  height:2px;
  background:linear-gradient(90deg,transparent,var(--accent),transparent);
}
.cta-panel h2{
  font-size:32px;
  font-weight:600;
  margin-bottom:12px;
}
.cta-panel p{
  color:var(--text-2);
  font-size:15px;
  margin-bottom:32px;
  max-width:560px;
  margin-left:auto;
  margin-right:auto;
}
@media(max-width:768px){
  .cta-panel{padding:40px 24px}
  .cta-panel h2{font-size:22px}
}
/* ========== 页脚 ========== */
.site-footer{
  background:#060D1D;
  border-top:2px solid transparent;
  border-image:linear-gradient(90deg,rgba(0,212,255,0.8),rgba(76,124,243,0.4)) 1;
  padding:64px 0 32px;
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr;
  gap:48px;
  margin-bottom:48px;
}
.footer-brand .logo{
  margin-bottom:16px;
}
.footer-brand p{
  font-size:14px;
  color:var(--text-3);
  line-height:1.7;
  max-width:320px;
}
.footer-social{
  display:flex;
  gap:12px;
  margin-top:20px;
}
.footer-social a{
  width:40px;
  height:40px;
  border-radius:10px;
  border:1px solid rgba(255,255,255,0.1);
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--text-2);
  font-size:16px;
  transition:all 0.3s ease;
}
.footer-social a:hover{
  border-color:var(--accent);
  color:var(--accent);
  box-shadow:var(--shadow-glow);
}
.footer-col h4{
  font-size:16px;
  font-weight:600;
  margin-bottom:20px;
  color:var(--text-1);
}
.footer-col ul li{
  margin-bottom:12px;
}
.footer-col ul li a{
  font-size:14px;
  color:var(--text-3);
  transition:all 0.3s ease;
}
.footer-col ul li a:hover{
  color:var(--accent);
  padding-left:6px;
}
.footer-security{
  display:flex;
  flex-direction:column;
  gap:16px;
}
.security-item{
  display:flex;
  align-items:center;
  gap:12px;
  background:rgba(255,255,255,0.03);
  border:1px solid rgba(255,255,255,0.06);
  padding:14px 18px;
  border-radius:var(--radius-md);
}
.security-item i{
  font-size:24px;
  color:var(--success);
}
.security-item span{
  font-size:14px;
  color:var(--text-2);
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.06);
  padding-top:24px;
  text-align:center;
}
.footer-bottom p{
  font-size:13px;
  color:var(--text-3);
  line-height:1.8;
}
.footer-bottom a{
  color:var(--text-3);
}
.footer-bottom a:hover{
  color:var(--accent);
}
@media(max-width:768px){
  .footer-grid{
    grid-template-columns:1fr;
    gap:36px;
  }
  .footer-brand p{max-width:100%}
  .site-footer{padding:48px 0 24px}
}
/* ========== 动画 ========== */
@keyframes fadeInUp{
  from{opacity:0;transform:translateY(12px)}
  to{opacity:1;transform:translateY(0)}
}
.fade-in-up{
  opacity:0;
  animation:fadeInUp 0.5s ease forwards;
}
@media(prefers-reduced-motion:reduce){
  *{animation-duration:0.01ms !important;transition-duration:0.01ms !important}
}
@media(max-width:768px){
  .fade-in-up{opacity:1;animation:none}
}

/* roulang page: category1 */
:root {
            --primary: #0B1D3A;
            --primary-deep: #081226;
            --panel: #0D1F38;
            --accent: #00D4FF;
            --accent2: #4C7CF3;
            --success: #2EE6A8;
            --warning: #FFC24B;
            --error: #FF5C7A;
            --text-1: #F0F6FF;
            --text-2: #A8B8D0;
            --text-3: #5E7391;
            --disabled: #3A4760;
            --glass-bg: rgba(255, 255, 255, 0.04);
            --glass-border: rgba(0, 212, 255, 0.16);
            --line: rgba(255, 255, 255, 0.06);
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --radius-pill: 999px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(0, 212, 255, 0.2);
            --shadow-glow: 0 0 24px rgba(0, 212, 255, 0.25);
            --font-main: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Microsoft YaHei", system-ui, sans-serif;
            --font-num: "DIN Alternate", "Bahnschrift", system-ui, sans-serif;
            --header-h: 72px;
            --section-gap: 96px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font-main);
            font-size: 15px;
            line-height: 1.8;
            letter-spacing: 0.01em;
            color: var(--text-2);
            background: radial-gradient(ellipse at 20% 0%, #0F243E 0%, #081226 58%, #050C1C 100%) fixed;
            background-color: #081226;
            padding-top: var(--header-h);
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
            border-radius: var(--radius-md);
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: all 0.3s ease;
        }

        button {
            font-family: inherit;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: var(--section-gap) 0;
            position: relative;
        }

        .section-head {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            margin-bottom: 40px;
        }

        .section-head::before {
            content: "";
            width: 4px;
            height: 24px;
            border-radius: 4px;
            background: linear-gradient(180deg, var(--accent), var(--accent2));
            flex-shrink: 0;
            margin-top: 6px;
        }

        .section-head h2 {
            font-size: 32px;
            line-height: 1.25;
            font-weight: 600;
            letter-spacing: 0.02em;
            color: var(--text-1);
        }

        .section-sub {
            font-size: 15px;
            color: var(--text-2);
            max-width: 720px;
            margin-top: 6px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 14px;
            font-weight: 500;
            letter-spacing: 0.02em;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all 0.3s ease;
            border: 1px solid transparent;
            line-height: 1.4;
            text-align: center;
        }

        .btn:active {
            transform: scale(0.97);
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--accent2));
            color: #FFFFFF;
            box-shadow: 0 0 24px rgba(0, 212, 255, 0.35);
        }

        .btn-primary:hover {
            box-shadow: 0 0 40px rgba(0, 212, 255, 0.55);
            filter: brightness(1.08);
            transform: translateY(-2px);
        }

        .btn-outline {
            background: transparent;
            border-color: rgba(0, 212, 255, 0.4);
            color: var(--accent);
        }

        .btn-outline:hover {
            background: rgba(0, 212, 255, 0.08);
            box-shadow: var(--shadow-glow);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
        }

        /* ===== Header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-h);
            z-index: 1000;
            background: rgba(8, 18, 38, 0.8);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0, 212, 255, 0.25);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 24px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(76, 124, 243, 0.2));
            border: 1px solid rgba(0, 212, 255, 0.35);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 18px;
            box-shadow: 0 0 16px rgba(0, 212, 255, 0.18);
        }

        .logo-text {
            font-size: 19px;
            font-weight: 700;
            letter-spacing: 0.02em;
            color: var(--text-1);
            white-space: nowrap;
        }

        .logo-accent {
            color: var(--accent);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 36px;
        }

        .main-nav a {
            position: relative;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-2);
            padding: 8px 2px;
            letter-spacing: 0.02em;
        }

        .main-nav a:hover {
            color: var(--text-1);
        }

        .main-nav a.active {
            color: var(--accent);
        }

        .main-nav a.active::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 2px;
            border-radius: 2px;
            background: var(--accent);
            box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
        }

        .header-right {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--text-1);
            font-size: 18px;
            align-items: center;
            justify-content: center;
        }

        .nav-toggle:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

        /* ===== Page Hero ===== */
        .page-hero {
            position: relative;
            padding: 88px 0 72px;
            background: linear-gradient(180deg, rgba(8, 18, 38, 0.75), rgba(11, 29, 58, 0.92)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            border-bottom: 1px solid rgba(0, 212, 255, 0.12);
            overflow: hidden;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(0, 212, 255, 0.07) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 212, 255, 0.07) 1px, transparent 1px);
            background-size: 60px 60px;
            mask-image: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.9), transparent 80%);
            -webkit-mask-image: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.9), transparent 80%);
            z-index: 1;
            pointer-events: none;
        }

        .page-hero::after {
            content: "";
            position: absolute;
            top: -80px;
            right: -60px;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 212, 255, 0.22) 0%, transparent 65%);
            z-index: 1;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 860px;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid rgba(0, 212, 255, 0.25);
            color: var(--accent);
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.04em;
            margin-bottom: 20px;
        }

        .hero-content h1 {
            font-size: 44px;
            line-height: 1.2;
            font-weight: 700;
            letter-spacing: 0.02em;
            color: var(--text-1);
            margin-bottom: 16px;
        }

        .hero-content h1 .highlight {
            background: linear-gradient(90deg, #FFFFFF 20%, var(--accent) 80%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        .hero-subtitle {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-2);
            max-width: 680px;
            margin-bottom: 28px;
        }

        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-2);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--line);
            border-radius: var(--radius-pill);
            padding: 6px 16px;
        }

        .hero-badge i {
            color: var(--accent);
            font-size: 13px;
        }

        /* ===== Category Overview ===== */
        .cat-overview {
            background: linear-gradient(180deg, rgba(13, 31, 56, 0.5), rgba(8, 18, 38, 0.8));
            border-bottom: 1px solid var(--line);
        }

        .tag-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 8px;
        }

        .tag-pill {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: var(--radius-pill);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            color: var(--text-2);
            font-size: 14px;
            font-weight: 500;
            transition: all 0.3s ease;
        }

        .tag-pill i {
            font-size: 12px;
            color: var(--accent);
        }

        .tag-pill:hover {
            border-color: rgba(0, 212, 255, 0.4);
            background: rgba(0, 212, 255, 0.06);
            color: var(--text-1);
            transform: translateY(-2px);
        }

        .tag-pill.highlight {
            background: rgba(0, 212, 255, 0.12);
            border-color: rgba(0, 212, 255, 0.35);
            color: var(--accent);
        }

        /* ===== Content Split ===== */
        .content-split {
            background: transparent;
        }

        .split-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 24px;
        }

        .glass-panel {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--glass-border);
            border-top-color: rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            overflow: hidden;
        }

        .panel-main {
            padding: 36px;
        }

        .panel-main h3 {
            font-size: 22px;
            line-height: 1.4;
            font-weight: 600;
            color: var(--text-1);
            letter-spacing: 0.02em;
            margin-bottom: 16px;
        }

        .panel-photo {
            margin-bottom: 24px;
            border-radius: var(--radius-md);
            overflow: hidden;
        }

        .panel-photo img {
            width: 100%;
            height: 260px;
            object-fit: cover;
            border-radius: var(--radius-md);
            transition: transform 0.5s ease;
        }

        .glass-panel:hover .panel-photo img {
            transform: scale(1.03);
        }

        .panel-main p {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-2);
            margin-bottom: 16px;
        }

        .info-list {
            list-style: none;
            margin-top: 20px;
            border-top: 1px solid var(--line);
            padding-top: 20px;
        }

        .info-list li {
            position: relative;
            padding-left: 20px;
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-2);
            margin-bottom: 10px;
        }

        .info-list li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 11px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 8px rgba(0, 212, 255, 0.4);
        }

        /* Side Index */
        .split-side {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .side-index {
            padding: 28px 24px;
        }

        .side-index h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-1);
            margin-bottom: 20px;
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .side-index h4 i {
            color: var(--accent);
            font-size: 15px;
        }

        .index-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .index-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.06);
            color: var(--text-2);
            font-size: 14px;
            font-weight: 500;
            transition: all 0.3s ease;
        }

        .index-item i {
            font-size: 12px;
            color: var(--text-3);
            transition: all 0.3s ease;
        }

        .index-item:hover {
            border-color: rgba(0, 212, 255, 0.35);
            background: rgba(0, 212, 255, 0.06);
            color: var(--text-1);
            transform: translateX(4px);
        }

        .index-item:hover i {
            color: var(--accent);
        }

        .index-item.active {
            background: rgba(0, 212, 255, 0.14);
            border-color: rgba(0, 212, 255, 0.45);
            color: var(--accent);
        }

        .index-item.active i {
            color: var(--accent);
        }

        /* ===== Value Section ===== */
        .value-section {
            background: linear-gradient(180deg, rgba(13, 31, 56, 0.45), rgba(8, 18, 38, 0.9));
            border-top: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
        }

        .value-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 24px;
        }

        .value-card {
            border-radius: var(--radius-lg);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--glass-border);
            border-top-color: rgba(255, 255, 255, 0.08);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: all 0.3s ease;
            position: relative;
        }

        .value-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .value-card.large {
            grid-row: span 2;
        }

        .value-card .value-img {
            width: 100%;
            height: 240px;
            object-fit: cover;
        }

        .value-card .value-body {
            padding: 28px;
        }

        .value-card h3 {
            font-size: 20px;
            line-height: 1.4;
            font-weight: 600;
            color: var(--text-1);
            margin-bottom: 12px;
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .value-card h3 i {
            color: var(--accent);
            font-size: 18px;
            width: 28px;
            height: 28px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            background: rgba(0, 212, 255, 0.1);
            border: 1px solid rgba(0, 212, 255, 0.2);
            flex-shrink: 0;
        }

        .value-card p {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-2);
        }

        /* ===== Process ===== */
        .process-section {
            background: transparent;
        }

        .process-steps {
            display: flex;
            flex-direction: column;
            gap: 0;
            margin-top: 16px;
        }

        .step-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            padding: 20px 0;
            position: relative;
        }

        .step-item:not(:last-child)::after {
            content: "";
            position: absolute;
            left: 19px;
            top: 52px;
            bottom: -2px;
            width: 2px;
            background: linear-gradient(180deg, rgba(0, 212, 255, 0.5), rgba(0, 212, 255, 0.1));
        }

        .step-dot {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-num);
            font-size: 15px;
            font-weight: 700;
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid rgba(0, 212, 255, 0.4);
            color: var(--accent);
            box-shadow: 0 0 14px rgba(0, 212, 255, 0.15);
            z-index: 1;
        }

        .step-body {
            padding-top: 4px;
        }

        .step-body h3 {
            font-size: 18px;
            line-height: 1.4;
            font-weight: 600;
            color: var(--text-1);
            margin-bottom: 6px;
            letter-spacing: 0.02em;
        }

        .step-body p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-2);
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: linear-gradient(180deg, rgba(13, 31, 56, 0.4), rgba(8, 18, 38, 0.85));
            border-top: 1px solid var(--line);
        }

        .faq-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }

        .faq-item {
            border-radius: var(--radius-lg);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--glass-border);
            border-top-color: rgba(255, 255, 255, 0.08);
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
            overflow: hidden;
        }

        .faq-item.open {
            border-color: rgba(0, 212, 255, 0.35);
            box-shadow: var(--shadow-hover);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            cursor: pointer;
            user-select: none;
        }

        .faq-question h4 {
            font-size: 16px;
            line-height: 1.5;
            font-weight: 600;
            color: var(--text-1);
            letter-spacing: 0.02em;
            flex: 1;
        }

        .faq-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: rgba(0, 212, 255, 0.1);
            border: 1px solid rgba(0, 212, 255, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 13px;
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            opacity: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, opacity 0.3s ease;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            opacity: 1;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            border-top: 1px solid var(--line);
            padding-top: 16px;
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-2);
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: transparent;
        }

        .cta-panel {
            position: relative;
            border-radius: var(--radius-lg);
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.08), rgba(76, 124, 243, 0.06)), rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(0, 212, 255, 0.25);
            border-top-color: rgba(255, 255, 255, 0.1);
            box-shadow: var(--shadow-card), 0 0 40px rgba(0, 212, 255, 0.08);
            padding: 56px 40px;
            text-align: center;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            overflow: hidden;
        }

        .cta-panel::before {
            content: "";
            position: absolute;
            top: -100px;
            right: -60px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 212, 255, 0.18) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-panel h2 {
            font-size: 32px;
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-1);
            letter-spacing: 0.02em;
            margin-bottom: 14px;
            position: relative;
        }

        .cta-panel p {
            font-size: 15px;
            color: var(--text-2);
            margin-bottom: 32px;
            position: relative;
        }

        .cta-panel .btn {
            position: relative;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #060D1D;
            border-top: 2px solid transparent;
            border-image: linear-gradient(90deg, transparent, var(--accent), transparent) 1;
            padding: 64px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .logo {
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-3);
            max-width: 340px;
            margin-bottom: 20px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-2);
            font-size: 16px;
            transition: all 0.3s ease;
        }

        .footer-social a:hover {
            border-color: rgba(0, 212, 255, 0.4);
            color: var(--accent);
            box-shadow: var(--shadow-glow);
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-1);
            letter-spacing: 0.02em;
            margin-bottom: 20px;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-col ul a {
            font-size: 14px;
            color: var(--text-2);
            transition: all 0.3s ease;
        }

        .footer-col ul a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-security {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .security-item {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            color: var(--text-2);
        }

        .security-item i {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: rgba(0, 212, 255, 0.08);
            border: 1px solid rgba(0, 212, 255, 0.18);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 14px;
            flex-shrink: 0;
        }

        .footer-bottom {
            border-top: 1px solid var(--line);
            padding-top: 24px;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: var(--text-3);
            line-height: 1.7;
        }

        .footer-bottom a {
            color: var(--text-3);
            transition: all 0.3s ease;
        }

        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (min-width: 769px) {
            .split-grid {
                grid-template-columns: 2fr 1fr;
                align-items: start;
            }

            .value-grid {
                grid-template-columns: 1fr 1fr;
                grid-auto-rows: minmax(220px, auto);
            }

            .value-card.large {
                grid-row: span 2;
            }

            .process-steps {
                flex-direction: row;
                gap: 24px;
                align-items: flex-start;
            }

            .step-item {
                flex: 1;
                flex-direction: column;
                align-items: flex-start;
                padding: 0;
                gap: 14px;
            }

            .step-item:not(:last-child)::after {
                left: auto;
                right: -14px;
                top: 20px;
                bottom: auto;
                width: 32px;
                height: 2px;
                background: linear-gradient(90deg, rgba(0, 212, 255, 0.5), rgba(0, 212, 255, 0.1));
            }

            .step-dot {
                width: 44px;
                height: 44px;
            }

            .faq-grid {
                grid-template-columns: 1fr 1fr;
                align-items: start;
            }

            .footer-grid {
                grid-template-columns: 1.4fr 1fr 1.2fr;
                gap: 60px;
            }
        }

        @media (min-width: 1200px) {
            .nav-toggle {
                display: none;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
                --section-gap: 48px;
            }

            .container {
                padding: 0 16px;
            }

            .section {
                padding: var(--section-gap) 0;
            }

            .section-head h2 {
                font-size: 22px;
            }

            .section-sub {
                font-size: 14px;
            }

            .nav-toggle {
                display: inline-flex;
            }

            .main-nav {
                position: fixed;
                top: 0;
                right: -100%;
                width: min(320px, 84vw);
                height: 100vh;
                background: rgba(8, 18, 38, 0.96);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                padding: 100px 32px 40px;
                transition: right 0.3s ease;
                z-index: 1001;
                box-shadow: -8px 0 40px rgba(0, 0, 0, 0.5);
            }

            .main-nav.nav-open {
                right: 0;
            }

            .main-nav a {
                font-size: 20px;
                line-height: 48px;
                width: 100%;
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            }

            .main-nav a.active::after {
                display: none;
            }

            .main-nav a.active {
                color: var(--accent);
            }

            .header-inner {
                gap: 12px;
            }

            .logo-text {
                font-size: 16px;
            }

            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }

            .header-right .btn-sm {
                display: none;
            }

            .page-hero {
                padding: 60px 0 48px;
            }

            .hero-content h1 {
                font-size: 28px;
                line-height: 1.25;
            }

            .hero-subtitle {
                font-size: 14px;
            }

            .hero-badges {
                gap: 10px;
            }

            .hero-badge {
                padding: 5px 12px;
                font-size: 12px;
            }

            .tag-pill {
                padding: 8px 16px;
                font-size: 13px;
            }

            .panel-main {
                padding: 24px 20px;
            }

            .panel-main h3 {
                font-size: 17px;
            }

            .panel-main p {
                font-size: 14px;
            }

            .panel-photo img {
                height: 180px;
            }

            .info-list li {
                font-size: 13px;
            }

            .value-card .value-img {
                height: 190px;
            }

            .value-card .value-body {
                padding: 22px 20px;
            }

            .value-card h3 {
                font-size: 17px;
            }

            .value-card p {
                font-size: 14px;
            }

            .process-steps {
                gap: 0;
            }

            .step-item {
                padding: 14px 0;
            }

            .step-dot {
                width: 36px;
                height: 36px;
                font-size: 14px;
            }

            .step-body h3 {
                font-size: 16px;
            }

            .step-body p {
                font-size: 13px;
            }

            .faq-question {
                padding: 18px 20px;
            }

            .faq-question h4 {
                font-size: 15px;
            }

            .faq-answer-inner {
                font-size: 13px;
            }

            .cta-section {
                padding: 48px 0;
            }

            .cta-panel {
                padding: 40px 20px;
            }

            .cta-panel h2 {
                font-size: 22px;
            }

            .cta-panel p {
                font-size: 14px;
            }

            .footer-grid {
                gap: 32px;
                text-align: center;
            }

            .footer-brand .logo {
                justify-content: center;
            }

            .footer-brand p {
                margin-left: auto;
                margin-right: auto;
            }

            .footer-social {
                justify-content: center;
            }

            .footer-col ul {
                align-items: center;
            }

            .footer-col ul a:hover {
                padding-left: 0;
                padding-right: 4px;
            }

            .footer-security {
                align-items: center;
            }

            .step-item:not(:last-child)::after {
                left: 17px;
            }
        }

/* roulang page: article */
/* ====== 设计变量 ====== */
:root {
  --primary: #0B1D3A;
  --secondary: #1B3A66;
  --accent: #00D4FF;
  --accent-2: #4C7CF3;
  --success: #2EE6A8;
  --warning: #FFC24B;
  --error: #FF5C7A;
  --text-1: #F0F6FF;
  --text-2: #A8B8D0;
  --text-3: #5E7391;
  --text-disabled: #3A4760;
  --bg-dark: #060D1D;
  --bg-main: #081226;
  --bg-panel: #0D1F38;
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-border: rgba(0, 212, 255, 0.16);
  --glass-highlight: rgba(255, 255, 255, 0.08);
  --divider: rgba(255, 255, 255, 0.06);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(0, 212, 255, 0.2);
  --shadow-glow: 0 0 24px rgba(0, 212, 255, 0.25);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --spacing-section: 96px;
  --spacing-section-mobile: 48px;
  --font-sans: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-num: "DIN Alternate", "Bahnschrift", system-ui;
}

/* ====== Reset / Base ====== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: radial-gradient(ellipse at 50% -20%, #0F243E 0%, #081226 55%, #060D1D 100%);
  background-attachment: fixed;
  color: var(--text-2);
  line-height: 1.8;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; transition: all 0.3s ease; }
ul, ol { list-style: none; }
button { font-family: inherit; border: none; cursor: pointer; background: none; }
input, textarea { font-family: inherit; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ====== 按钮 ====== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  line-height: 1.4;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, #00D4FF, #4C7CF3);
  color: #FFFFFF;
  box-shadow: 0 0 24px rgba(0, 212, 255, 0.35);
}
.btn-primary:hover {
  box-shadow: 0 0 40px rgba(0, 212, 255, 0.55);
  color: #FFFFFF;
  transform: translateY(-1px);
}
.btn-primary:active { transform: scale(0.97); box-shadow: 0 0 16px rgba(0, 212, 255, 0.3); }
.btn-outline {
  background: transparent;
  border: 1px solid rgba(0, 212, 255, 0.4);
  color: var(--accent);
}
.btn-outline:hover { background: rgba(0, 212, 255, 0.08); color: var(--accent); }
.btn-outline:active { transform: scale(0.97); }
.btn-sm { padding: 8px 18px; font-size: 13px; border-radius: 6px; }
.btn-block { width: 100%; }

/* ====== Header ====== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(8, 18, 38, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 212, 255, 0.25);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(76, 124, 243, 0.3));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 18px;
  border: 1px solid rgba(0, 212, 255, 0.3);
  box-shadow: 0 0 16px rgba(0, 212, 255, 0.2);
}
.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: 0.02em;
}
.logo-accent {
  color: var(--accent);
  text-shadow: 0 0 16px rgba(0, 212, 255, 0.4);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}
.main-nav a {
  padding: 8px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-2);
  border-radius: 6px;
  position: relative;
  text-decoration: none;
}
.main-nav a:hover { color: var(--text-1); background: rgba(255, 255, 255, 0.04); }
.main-nav a.active {
  color: var(--accent);
}
.main-nav a.active::after {
  content: '';
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 2px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  box-shadow: 0 0 8px rgba(0, 212, 255, 0.5);
}
.header-right {
  display: flex;
  align-items: center;
  gap: 14px;
}
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 8px;
  color: var(--text-1);
  font-size: 20px;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* ====== Mobile Menu ====== */
.mobile-menu {
  display: none;
  position: fixed;
  top: 70px;
  left: 0;
  right: 0;
  z-index: 999;
  background: rgba(8, 18, 38, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 212, 255, 0.2);
  padding: 20px 24px 32px;
  flex-direction: column;
  gap: 4px;
  transform: translateY(-110%);
  transition: transform 0.35s ease;
}
.mobile-menu.open { transform: translateY(0); display: flex; }
.mobile-menu a {
  display: flex;
  align-items: center;
  padding: 14px 16px;
  font-size: 18px;
  color: var(--text-1);
  border-radius: 10px;
  text-decoration: none;
  min-height: 48px;
}
.mobile-menu a:hover { background: rgba(255, 255, 255, 0.04); color: var(--accent); }
.mobile-menu a.active { color: var(--accent); background: rgba(0, 212, 255, 0.08); }
.mobile-menu .btn { margin-top: 12px; }

/* ====== 文章 Hero ====== */
.page-hero {
  position: relative;
  padding: 140px 0 60px;
  background:
    linear-gradient(rgba(0, 212, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.05) 1px, transparent 1px),
    linear-gradient(135deg, rgba(8, 18, 38, 0.94), rgba(13, 31, 56, 0.88)),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  background-size: 40px 40px, 40px 40px, cover, cover;
  border-bottom: 1px solid rgba(0, 212, 255, 0.12);
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.15), transparent 60%);
  pointer-events: none;
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--text-3);
  margin-bottom: 40px;
  padding: 10px 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-pill);
  width: fit-content;
  max-width: 100%;
}
.breadcrumb a { color: var(--text-2); text-decoration: none; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .breadcrumb-sep { color: var(--text-3); }
.breadcrumb .breadcrumb-current {
  color: var(--text-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 240px;
}

/* ====== 文章头部 ====== */
.article-heading {
  text-align: center;
}
.article-heading .article-category {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 18px;
  border-radius: var(--radius-pill);
  background: rgba(0, 212, 255, 0.12);
  color: var(--accent);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  margin-bottom: 20px;
  border: 1px solid rgba(0, 212, 255, 0.2);
}
.article-heading h1 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-1);
  line-height: 1.35;
  letter-spacing: 0.02em;
  max-width: 840px;
  margin: 0 auto 20px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 24px;
  font-size: 13px;
  color: var(--text-3);
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.meta-item i { color: var(--accent); font-size: 13px; }

/* ====== 文章主体 ====== */
.article-main {
  padding: 64px 0 0;
}
.article-card {
  max-width: 840px;
  margin: 0 auto;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  padding: 48px 56px;
  position: relative;
}
.article-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 32px;
  right: 32px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.4), transparent);
}

/* ====== 正文排版 ====== */
.article-content {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-2);
  max-width: 720px;
  margin: 0 auto;
}
.article-content h2 {
  font-size: 22px;
  color: var(--text-1);
  font-weight: 600;
  margin: 40px 0 16px;
  letter-spacing: 0.02em;
  line-height: 1.4;
  padding-left: 16px;
  border-left: 4px solid var(--accent);
  border-radius: 0 4px 4px 0;
}
.article-content h3 {
  font-size: 18px;
  color: var(--text-1);
  font-weight: 600;
  margin: 28px 0 12px;
  letter-spacing: 0.01em;
}
.article-content h4 {
  font-size: 16px;
  color: var(--text-1);
  font-weight: 500;
  margin: 20px 0 10px;
}
.article-content p {
  margin-bottom: 20px;
  letter-spacing: 0.01em;
}
.article-content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-content a:hover { color: var(--text-1); }
.article-content blockquote {
  border-left: 3px solid var(--accent);
  background: rgba(0, 212, 255, 0.06);
  padding: 16px 20px;
  border-radius: 0 12px 12px 0;
  margin: 24px 0;
  color: var(--text-2);
  font-style: normal;
}
.article-content blockquote p:last-child { margin-bottom: 0; }
.article-content img {
  max-width: 100%;
  border-radius: var(--radius-md);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  margin: 24px auto;
  height: auto;
}
.article-content ul,
.article-content ol {
  margin: 16px 0 24px;
  padding-left: 24px;
}
.article-content ul li {
  position: relative;
  padding-left: 8px;
  margin-bottom: 8px;
}
.article-content ul li::before {
  content: '';
  position: absolute;
  left: -18px;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px rgba(0, 212, 255, 0.5);
}
.article-content ol li {
  list-style: decimal;
  margin-bottom: 8px;
  padding-left: 4px;
}
.article-content code {
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 14px;
  color: var(--accent);
  border: 1px solid rgba(255, 255, 255, 0.06);
}
.article-content pre {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 20px;
  overflow-x: auto;
  margin: 24px 0;
  font-size: 13px;
  line-height: 1.7;
}
.article-content pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text-2);
  white-space: pre;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.article-content th,
.article-content td {
  padding: 12px 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  text-align: left;
}
.article-content th {
  background: rgba(0, 212, 255, 0.08);
  color: var(--text-1);
  font-weight: 600;
}
.article-content tr:nth-child(even) td {
  background: rgba(255, 255, 255, 0.02);
}
.article-content hr {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.3), transparent);
  margin: 40px 0;
}

/* ====== 文章标签 ====== */
.article-tags {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 28px 0 0;
  margin-top: 40px;
  border-top: 1px solid var(--divider);
}
.tag-label {
  font-size: 13px;
  color: var(--text-3);
  letter-spacing: 0.05em;
}
.tag {
  display: inline-flex;
  align-items: center;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  background: rgba(0, 212, 255, 0.1);
  color: var(--accent);
  font-size: 13px;
  font-weight: 500;
  border: 1px solid rgba(0, 212, 255, 0.18);
}
.tag:hover { background: rgba(0, 212, 255, 0.2); }

/* ====== 正文底部渐变分隔线 ====== */
.article-divider {
  height: 2px;
  max-width: 720px;
  margin: 48px auto 0;
  background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.4), transparent);
  border-radius: 2px;
}

/* ====== 内容未找到 ====== */
.article-empty {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  padding: 80px 24px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
}
.article-empty .empty-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  border-radius: 50%;
  border: 2px dashed rgba(0, 212, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--accent);
}
.article-empty p {
  font-size: 18px;
  color: var(--text-1);
  margin-bottom: 24px;
}

/* ====== 相关推荐 ====== */
.related-section {
  padding: 64px 0 0;
}
.section-heading {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 32px;
}
.section-heading::before {
  content: '';
  width: 4px;
  height: 24px;
  background: var(--accent);
  border-radius: 4px;
  box-shadow: 0 0 8px rgba(0, 212, 255, 0.4);
}
.section-heading h3 {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-1);
  letter-spacing: 0.02em;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 24px;
  text-decoration: none;
  transition: all 0.3s ease;
  min-height: 140px;
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(0, 212, 255, 0.3);
}
.related-card h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-1);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.3s ease;
}
.related-card:hover h4 { color: var(--accent); }
.related-card .related-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.related-date {
  font-size: 13px;
  color: var(--text-3);
  font-family: var(--font-num);
}
.related-arrow {
  color: var(--accent);
  font-size: 14px;
  transition: transform 0.3s ease;
}
.related-card:hover .related-arrow { transform: translateX(4px); }

/* ====== 返回入口 ====== */
.article-back {
  padding: 64px 0 96px;
  text-align: center;
}

/* ====== FAQ (页面底部参考) ====== */
.faq-section { padding: 0 0 var(--spacing-section); }
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 40px;
}
.faq-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
}
.faq-item:hover { border-color: rgba(0, 212, 255, 0.3); }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-1);
  min-height: 44px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .faq-icon {
  color: var(--accent);
  font-size: 14px;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}
.faq-item[open] summary .faq-icon { transform: rotate(180deg); }
.faq-answer {
  padding: 0 24px 20px;
  border-top: 1px solid var(--divider);
  padding-top: 16px;
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
}

/* ====== CTA ====== */
.cta-panel {
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.08), rgba(76, 124, 243, 0.12));
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-panel::before {
  content: '';
  position: absolute;
  top: -80px;
  left: -80px;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.2), transparent 60%);
  pointer-events: none;
}
.cta-panel h3 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}
.cta-panel p {
  color: var(--text-2);
  max-width: 520px;
  margin: 0 auto 32px;
  font-size: 15px;
}

/* ====== Footer ====== */
.site-footer {
  background: #060D1D;
  border-top: 2px solid transparent;
  border-image: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.6), transparent) 1;
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p {
  font-size: 14px;
  color: var(--text-3);
  line-height: 1.8;
  margin-bottom: 24px;
  max-width: 360px;
}
.footer-social {
  display: flex;
  gap: 12px;
}
.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-2);
  font-size: 16px;
  transition: all 0.3s ease;
}
.footer-social a:hover {
  color: var(--accent);
  border-color: rgba(0, 212, 255, 0.3);
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.15);
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 20px;
  letter-spacing: 0.02em;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 32px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-col ul a {
  font-size: 14px;
  color: var(--text-2);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.3s ease;
}
.footer-col ul a::before {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--text-3);
  transition: all 0.3s ease;
}
.footer-col ul a:hover { color: var(--accent); padding-left: 4px; }
.footer-col ul a:hover::before { background: var(--accent); box-shadow: 0 0 6px rgba(0, 212, 255, 0.5); }
.footer-security {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.security-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text-2);
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm);
}
.security-item i {
  color: var(--success);
  font-size: 16px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 24px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--text-3);
}
.footer-bottom a {
  color: var(--text-2);
  text-decoration: none;
}
.footer-bottom a:hover { color: var(--accent); }

/* ====== 动画 ====== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in-up {
  animation: fadeInUp 0.5s ease both;
}
@keyframes floatSlow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ====== 响应式 ====== */
@media (max-width: 1024px) {
  .article-card { padding: 40px 32px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .main-nav { display: none; }
  .header-right .btn-primary { display: none; }
  .nav-toggle { display: flex; }
  .page-hero { padding: 110px 0 40px; }
  .page-hero::before { width: 200px; height: 200px; top: -50px; right: -50px; }
  .breadcrumb { margin-bottom: 28px; padding: 8px 14px; font-size: 12px; }
  .breadcrumb .breadcrumb-current { max-width: 160px; }
  .article-heading h1 { font-size: 26px; }
  .article-meta { font-size: 12px; gap: 8px 16px; }
  .article-card { padding: 28px 20px; border-radius: var(--radius-md); }
  .article-content { font-size: 14px; }
  .article-content h2 { font-size: 19px; }
  .article-content h3 { font-size: 16px; }
  .related-grid { grid-template-columns: 1fr; }
  .faq-grid { grid-template-columns: 1fr; }
  .cta-panel { padding: 32px 20px; }
  .cta-panel h3 { font-size: 22px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; text-align: center; }
  .footer-brand p { margin-left: auto; margin-right: auto; }
  .footer-social { justify-content: center; }
  .footer-col h4::after { left: 50%; transform: translateX(-50%); }
  .footer-col ul li { justify-content: center; }
  .footer-security { align-items: center; }
  .security-item { width: 100%; max-width: 280px; justify-content: center; }
  .article-back { padding: 48px 0 64px; }
  .section-heading h3 { font-size: 20px; }
}

@media (max-width: 480px) {
  .page-hero { padding: 100px 0 32px; }
  .article-heading h1 { font-size: 22px; }
  .article-card { padding: 20px 16px; }
  .breadcrumb .breadcrumb-current { max-width: 120px; }
  .related-card { min-height: 120px; padding: 18px; }
  .btn { padding: 10px 20px; }
}