/* roulang page: index */
:root{
  --sky-900:#0B0916;
  --sky-800:#14102A;
  --sky-700:#1E1838;
  --violet-600:#4B3A8F;
  --violet-500:#6B54C4;
  --aurora-400:#35E0C8;
  --amber-400:#FFC24B;
  --ink-050:#F6F4FB;
  --ink-000:#FFFFFF;
  --line-light:#E4DFF2;
  --text-dark:#1A1530;
  --text-muted-dark:#6B6585;
  --text-light:#EDEAF7;
  --text-muted-light:#A79FC4;
  --line-dark:rgba(255,255,255,.10);
  --radius-btn:999px;
  --radius-card:18px;
  --radius-img:12px;
  --radius-input:12px;
  --radius-badge:6px;
  --radius-cta:24px;
  --shadow-card:0 8px 24px rgba(75,58,143,.10);
  --shadow-card-hover:0 14px 32px rgba(75,58,143,.16);
  --container:1200px;
  --gutter:24px;
  --sec-desktop:96px;
  --sec-tablet:72px;
  --sec-mobile:56px;
  --font-head:"Noto Serif SC","Source Han Serif SC",Georgia,"Songti SC",serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.85;
  color:var(--text-dark);
  background:var(--ink-050);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
h1,h2,h3,h4{font-family:var(--font-head);color:inherit;letter-spacing:.01em;margin:0;}
h1{font-size:clamp(30px,4.4vw,54px);font-weight:800;line-height:1.18;}
h2{font-size:clamp(24px,3vw,36px);font-weight:700;line-height:1.28;}
h3{font-size:clamp(19px,1.6vw,23px);font-weight:600;line-height:1.4;}
p{margin:0 0 1em;}
a{color:inherit;text-decoration:none;transition:color 180ms ease,border-color 180ms ease;}
a:hover{color:var(--violet-500);}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;}
input,textarea{font-family:inherit;font-size:15px;color:var(--text-dark);}
:focus-visible{outline:2px solid var(--aurora-400);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 var(--gutter);}
@media (min-width:1440px){:root{--container:1320px;}}
.section{padding:var(--sec-desktop) 0;}
.section--tight{padding:calc(var(--sec-desktop) * .7) 0;}
.section--dark{background:var(--sky-800);color:var(--text-light);}
.section--dark .muted{color:var(--text-muted-light);}
.muted{color:var(--text-muted-dark);}
.num{font-variant-numeric:tabular-nums;}

/* ============ 星点装饰 ============ */
.star-field{position:relative;isolation:isolate;overflow:hidden;}
.star-field::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background-image:
    radial-gradient(1.5px 1.5px at 12% 22%, rgba(255,255,255,.55), transparent 60%),
    radial-gradient(1.5px 1.5px at 78% 12%, rgba(53,224,200,.45), transparent 60%),
    radial-gradient(1.5px 1.5px at 34% 68%, rgba(255,255,255,.35), transparent 60%),
    radial-gradient(1.5px 1.5px at 62% 82%, rgba(255,194,75,.35), transparent 60%),
    radial-gradient(1.5px 1.5px at 90% 54%, rgba(255,255,255,.30), transparent 60%);
  opacity:.55;
  animation:starDrift 60s linear infinite;
}
@keyframes starDrift{from{transform:translate3d(0,0,0);}to{transform:translate3d(-24px,-18px,0);}}
@media (prefers-reduced-motion:reduce){
  .star-field::before{animation:none;}
  *{scroll-behavior:auto !important;transition-duration:.01ms !important;}
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 26px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1;
  transition:transform 200ms ease,box-shadow 200ms ease,background-color 180ms ease,color 180ms ease,border-color 180ms ease;
  white-space:nowrap;
}
.btn:active{transform:translateY(1px);filter:brightness(.96);}
.btn-primary{background:var(--aurora-400);color:#062B27;}
.btn-primary:hover{background:#4BEFD8;color:#062B27;box-shadow:0 0 0 4px rgba(53,224,200,.18);}
.btn-outline{border:1px solid var(--line-light);background:var(--ink-000);color:var(--text-dark);}
.btn-outline:hover{border-color:var(--violet-500);color:var(--violet-500);box-shadow:0 0 0 4px rgba(107,84,196,.12);}
.btn-dark-outline{border:1px solid var(--line-dark);background:transparent;color:var(--text-light);}
.btn-dark-outline:hover{border-color:var(--aurora-400);color:var(--aurora-400);}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn[disabled],.btn.is-loading{opacity:.55;cursor:not-allowed;box-shadow:none;transform:none;}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--radius-badge);
  font-size:12.5px;font-weight:600;line-height:1.6;
  background:rgba(75,58,143,.10);color:var(--violet-600);
}
.badge--amber{border:1px solid rgba(255,194,75,.6);background:rgba(255,194,75,.12);color:#8A5B00;}
.badge--dark{background:rgba(53,224,200,.12);color:var(--aurora-400);}
.chip{
  display:inline-flex;align-items:center;
  height:34px;padding:0 16px;border-radius:var(--radius-btn);
  border:1px solid var(--line-light);background:var(--ink-000);
  font-size:14px;color:var(--text-muted-dark);
  transition:all 180ms ease;
}
.chip:hover{border-color:var(--violet-500);color:var(--violet-600);}
.chip.is-active{border-color:var(--aurora-400);color:#0E7A6C;background:rgba(53,224,200,.08);}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(11,9,22,.55);
  backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background-color 220ms ease,border-color 220ms ease;
}
.site-header.is-stuck{background:rgba(11,9,22,.92);border-bottom-color:var(--line-dark);}
.nav-inner{
  display:flex;align-items:center;gap:24px;
  height:64px;
}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text-light);flex-shrink:0;}
.brand:hover{color:var(--text-light);}
.brand svg{width:26px;height:26px;flex-shrink:0;}
.brand-name{font-family:var(--font-head);font-weight:700;font-size:18px;letter-spacing:.01em;white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:22px;margin-left:8px;}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--text-muted-light);padding:6px 0;
}
.nav-link:hover{color:var(--text-light);}
.nav-link.is-active{color:var(--text-light);}
.nav-link.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  background:var(--aurora-400);border-radius:2px;
}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto;}
.search-form{position:relative;display:flex;align-items:center;}
.search-form input{
  height:38px;width:200px;padding:0 16px;
  border-radius:var(--radius-btn);
  border:1px solid var(--line-dark);
  background:rgba(255,255,255,.06);
  color:var(--text-light);
  font-size:14px;
  transition:border-color 180ms ease,background-color 180ms ease;
}
.search-form input::placeholder{color:var(--text-muted-light);}
.search-form input:focus{outline:none;border-color:var(--aurora-400);background:rgba(255,255,255,.10);}
.burger{
  display:none;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line-dark);align-items:center;justify-content:center;
}
.burger span{display:block;width:18px;height:2px;background:var(--text-light);border-radius:2px;position:relative;}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text-light);border-radius:2px;
}
.burger span::before{top:-6px;}
.burger span::after{top:6px;}

.drawer{
  position:fixed;inset:0;z-index:200;
  background:var(--sky-900);
  display:flex;flex-direction:column;
  padding:20px var(--gutter) 28px;
  transform:translateY(-100%);
  transition:transform 300ms ease;
  visibility:hidden;
}
.drawer.is-open{transform:translateY(0);visibility:visible;}
.drawer-top{display:flex;align-items:center;justify-content:space-between;height:56px;}
.drawer-close{width:42px;height:42px;border-radius:12px;border:1px solid var(--line-dark);color:var(--text-light);font-size:20px;line-height:1;}
.drawer-nav{display:flex;flex-direction:column;gap:6px;margin-top:32px;flex:1;}
.drawer-nav a{
  font-family:var(--font-head);font-size:26px;font-weight:700;color:var(--text-light);
  padding:12px 0;border-bottom:1px solid var(--line-dark);
}
.drawer-nav a:hover{color:var(--aurora-400);}
.drawer-cta{margin-top:20px;}
.drawer-cta .btn{width:100%;}

/* ============ Hero ============ */
.hero{
  position:relative;
  background:linear-gradient(160deg,#0B0916 0%,#171235 52%,#0E0B20 100%);
  color:var(--text-light);
  padding:calc(64px + 64px) 0 88px;
  overflow:hidden;
}
.hero::after{
  content:"";position:absolute;z-index:0;pointer-events:none;
  right:-120px;top:-120px;width:520px;height:520px;
  border:1px solid rgba(53,224,200,.14);
  border-radius:50% 50% 50% 50%/60% 60% 40% 40%;
  opacity:.6;
}
.hero-inner{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  min-height:calc(100vh - 64px - 152px);
}
.hero-copy .badge{margin-bottom:20px;}
.hero h1{color:var(--text-light);margin-bottom:20px;}
.hero-sub{
  font-size:clamp(15px,1.2vw,17px);line-height:1.9;color:var(--text-muted-light);
  max-width:560px;margin-bottom:30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:38px;}
.hero-points{display:flex;flex-wrap:wrap;gap:28px;}
.hero-point{display:flex;flex-direction:column;gap:2px;min-width:120px;}
.hero-point b{
  font-family:var(--font-head);font-size:26px;font-weight:800;color:var(--amber-400);
  font-variant-numeric:tabular-nums;line-height:1.2;
}
.hero-point span{font-size:13.5px;color:var(--text-muted-light);line-height:1.6;}
.hero-media{position:relative;}
.hero-media img{
  width:100%;height:clamp(320px,44vw,480px);
  object-fit:cover;border-radius:20px;
  border:1px solid var(--line-dark);
}
.hero-media::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:34%;
  background:linear-gradient(90deg,rgba(11,9,22,.92),rgba(11,9,22,0));
  border-radius:20px 0 0 20px;pointer-events:none;
}
.float-card{
  position:absolute;display:flex;align-items:center;gap:10px;
  padding:12px 16px;border-radius:14px;
  background:rgba(20,16,42,.92);
  border:1px solid var(--line-dark);
  box-shadow:0 10px 26px rgba(0,0,0,.35);
  font-size:13px;color:var(--text-light);
}
.float-card b{font-weight:600;display:block;font-size:13.5px;}
.float-card small{color:var(--text-muted-light);font-size:12px;}
.float-card--a{right:20px;top:32px;}
.float-card--b{right:36px;bottom:34px;}
.pulse-dot{
  width:9px;height:9px;border-radius:50%;background:var(--aurora-400);flex-shrink:0;
  box-shadow:0 0 0 0 rgba(53,224,200,.6);
  animation:pulse 2.4s ease-out infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(53,224,200,.55);}
  70%{box-shadow:0 0 0 10px rgba(53,224,200,0);}
  100%{box-shadow:0 0 0 0 rgba(53,224,200,0);}
}

/* ============ 板块头 ============ */
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:42px;
}
.section-head p{margin:8px 0 0;color:var(--text-muted-dark);font-size:15px;max-width:640px;}
.link-more{
  font-size:14.5px;font-weight:600;color:var(--violet-600);
  display:inline-flex;align-items:center;gap:6px;white-space:nowrap;
}
.link-more::after{content:"→";transition:transform 180ms ease;}
.link-more:hover{color:var(--violet-500);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:2px;}
.link-more:hover::after{transform:translateX(3px);}

/* ============ 入口网格 ============ */
.entry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.entry-card{
  position:relative;display:flex;flex-direction:column;
  background:var(--ink-000);border:1px solid var(--line-light);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-card);
  transition:transform 220ms ease-out,box-shadow 220ms ease-out,border-color 220ms ease-out;
}
.entry-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-hover);border-color:var(--aurora-400);}
.entry-card .thumb{position:relative;overflow:hidden;aspect-ratio:16/10;background:linear-gradient(135deg,var(--violet-600),var(--sky-800));}
.entry-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform 220ms ease-out;}
.entry-card:hover .thumb img{transform:scale(1.04);}
.entry-card .thumb .badge{position:absolute;left:12px;top:12px;background:rgba(255,255,255,.94);}
.entry-card .body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;}
.entry-card h3{margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.entry-card p{font-size:14.5px;color:var(--text-muted-dark);margin:0 0 18px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.entry-card .meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line-light);
  font-size:13px;color:var(--text-muted-dark);
}
.entry-card .meta .arrow{color:var(--violet-500);font-size:16px;}
.entry-card--feature{grid-column:span 2;}
.entry-card--feature .thumb{aspect-ratio:21/9;}
.entry-card--feature .body{padding:24px 26px 26px;}
.entry-card--feature h3{font-size:clamp(20px,2vw,26px);}
.entry-card--feature p{-webkit-line-clamp:3;font-size:15px;}

/* ============ 评价轮播 ============ */
.testi-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:34px;}
.testi-track{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding-bottom:14px;scrollbar-width:none;
}
.testi-track::-webkit-scrollbar{display:none;}
.testi-card{
  flex:0 0 340px;scroll-snap-align:start;
  background:var(--sky-700);border:1px solid var(--line-dark);border-radius:var(--radius-card);
  padding:24px 22px;color:var(--text-light);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
}
.testi-top{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
.avatar{
  width:42px;height:42px;border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-head);font-weight:700;font-size:17px;color:#0B0916;
  background:var(--aurora-400);
}
.avatar--b{background:var(--amber-400);}
.avatar--c{background:#9C8BE0;}
.avatar--d{background:#7BE0A8;}
.testi-name{font-weight:600;font-size:15px;}
.testi-meta{font-size:12.5px;color:var(--text-muted-light);}
.stars{color:var(--amber-400);font-size:14px;letter-spacing:2px;margin:0 0 10px;}
.testi-text{font-size:14.5px;line-height:1.85;color:var(--text-light);margin:0 0 14px;}
.testi-src{font-size:12.5px;color:var(--text-muted-light);}
.carousel-btns{display:flex;gap:10px;}
.carousel-btns button{
  width:42px;height:42px;border-radius:50%;border:1px solid var(--line-dark);
  color:var(--text-light);font-size:16px;line-height:1;
  transition:border-color 180ms ease,color 180ms ease;
}
.carousel-btns button:hover{border-color:var(--aurora-400);color:var(--aurora-400);}
.dots{display:none;justify-content:center;gap:8px;margin-top:18px;}
.dots button{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.25);}
.dots button.is-active{background:var(--aurora-400);width:20px;border-radius:5px;}

/* ============ 保障条 ============ */
.assurance{
  background:var(--ink-000);border:1px solid var(--line-light);border-radius:var(--radius-card);
  display:grid;grid-template-columns:repeat(4,1fr);
  box-shadow:var(--shadow-card);
}
.assurance-item{
  display:flex;gap:14px;align-items:flex-start;
  padding:26px 24px;
  border-right:1px solid var(--line-light);
}
.assurance-item:last-child{border-right:none;}
.assurance-item svg{width:24px;height:24px;flex-shrink:0;color:var(--violet-500);}
.assurance-item h4{font-family:var(--font-body);font-size:15.5px;font-weight:700;margin-bottom:4px;}
.assurance-item p{font-size:13.5px;color:var(--text-muted-dark);margin:0;line-height:1.7;}

/* ============ 资讯区 ============ */
.news-wrap{display:grid;grid-template-columns:1.15fr 1fr;gap:24px;}
.news-feature{
  background:var(--ink-000);border:1px solid var(--line-light);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-card);display:flex;flex-direction:column;
  transition:transform 220ms ease-out,box-shadow 220ms ease-out,border-color 220ms ease-out;
}
.news-feature:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-hover);border-color:var(--aurora-400);}
.news-feature .thumb{position:relative;overflow:hidden;aspect-ratio:16/9;background:linear-gradient(135deg,var(--violet-600),var(--sky-800));}
.news-feature .thumb img{width:100%;height:100%;object-fit:cover;transition:transform 220ms ease-out;}
.news-feature:hover .thumb img{transform:scale(1.04);}
.news-feature .thumb .badge{position:absolute;left:12px;top:12px;background:rgba(255,255,255,.94);}
.news-feature .body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1;}
.news-feature h3{margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-feature p{font-size:14.5px;color:var(--text-muted-dark);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;margin:0 0 16px;}
.news-feature .meta{margin-top:auto;font-size:13px;color:var(--text-muted-dark);display:flex;gap:14px;}
.news-list{background:var(--ink-000);border:1px solid var(--line-light);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card);}
.news-item{
  display:flex;gap:16px;align-items:flex-start;
  padding:20px 22px;border-bottom:1px solid var(--line-light);
  transition:background-color 180ms ease;
}
.news-item:last-child{border-bottom:none;}
.news-item:hover{background:rgba(75,58,143,.04);}
.news-item .idx{
  font-family:var(--font-head);font-weight:800;font-size:17px;color:var(--amber-400);
  font-variant-numeric:tabular-nums;flex-shrink:0;width:26px;line-height:1.6;
}
.news-item .txt{min-width:0;flex:1;}
.news-item h4{
  font-family:var(--font-body);font-size:15.5px;font-weight:600;line-height:1.6;margin-bottom:6px;
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;
}
.news-item .sub{font-size:13px;color:var(--text-muted-dark);display:flex;gap:12px;flex-wrap:wrap;}
.news-item .arrow{color:var(--violet-500);flex-shrink:0;line-height:1.6;}
.empty-state{
  padding:56px 24px;text-align:center;color:var(--text-muted-dark);
}
.empty-state svg{width:44px;height:44px;color:var(--line-light);margin-bottom:14px;}
.empty-state p{margin:0 0 18px;font-size:14.5px;}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:14px;max-width:920px;}
.faq-item{
  background:var(--ink-000);border:1px solid var(--line-light);border-radius:14px;
  overflow:hidden;position:relative;transition:border-color 180ms ease,box-shadow 180ms ease;
}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:transparent;transition:background-color 180ms ease;
}
.faq-item.is-open{border-color:var(--line-light);box-shadow:var(--shadow-card);}
.faq-item.is-open::before{background:var(--aurora-400);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;text-align:left;font-size:16px;font-weight:600;line-height:1.6;color:var(--text-dark);
}
.faq-q:hover{color:var(--violet-600);}
.faq-icon{
  width:24px;height:24px;flex-shrink:0;border-radius:50%;border:1px solid var(--line-light);
  display:flex;align-items:center;justify-content:center;color:var(--violet-500);
  font-size:15px;line-height:1;transition:transform 220ms ease,background-color 180ms ease,color 180ms ease;
}
.faq-item.is-open .faq-icon{transform:rotate(180deg);background:var(--aurora-400);color:#062B27;border-color:var(--aurora-400);}
.faq-a{max-height:0;overflow:hidden;transition:max-height 280ms ease;}
.faq-a-inner{padding:0 22px 22px;font-size:15px;line-height:1.85;color:var(--text-muted-dark);}

/* ============ 强 CTA ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--radius-cta);
  background:linear-gradient(120deg,var(--violet-600) 0%,#2A1F58 45%,var(--sky-900) 100%);
  color:var(--text-light);
  display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:32px;
  padding:56px 52px;
}
.cta-band h2{color:var(--text-light);margin-bottom:12px;}
.cta-band p{color:#C9C1E6;font-size:15px;margin-bottom:26px;max-width:520px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}
.cta-media{position:relative;}
.cta-media img{
  width:100%;height:280px;object-fit:cover;border-radius:18px;
  border:1px solid var(--line-dark);opacity:.9;
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--sky-900);color:var(--text-light);
  border-top:1px solid var(--line-dark);
  padding:72px 0 0;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--text-muted-light);max-width:320px;}
.footer-col h4{
  font-family:var(--font-body);font-size:15px;font-weight:700;margin-bottom:16px;color:var(--text-light);
}
.footer-col ul{display:grid;gap:10px;}
.footer-col a,.footer-col li span{font-size:14px;color:var(--text-muted-light);}
.footer-col a:hover{color:var(--aurora-400);text-decoration:underline;text-underline-offset:3px;}
.footer-bottom{
  margin-top:52px;padding:22px 0;border-top:1px solid var(--line-dark);
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13px;color:var(--text-muted-light);
}
.footer-bottom a{color:var(--text-muted-light);}
.footer-bottom a:hover{color:var(--aurora-400);}

/* ============ 响应式 ============ */
@media (max-width:1280px){
  .hero-inner{gap:40px;}
  .nav-links{gap:18px;}
  .search-form input{width:170px;}
}
@media (max-width:1024px){
  :root{--gutter:20px;}
  .section{padding:var(--sec-tablet) 0;}
  .nav-links{display:none;}
  .search-form{display:none;}
  .burger{display:flex;}
  .nav-inner{height:56px;}
  .hero{padding:calc(56px + 48px) 0 64px;}
  .hero-inner{grid-template-columns:1fr;min-height:auto;}
  .hero-media img{height:340px;}
  .hero-media::before{display:none;}
  .entry-grid{grid-template-columns:repeat(2,1fr);}
  .entry-card--feature{grid-column:span 2;}
  .assurance{grid-template-columns:repeat(2,1fr);}
  .assurance-item:nth-child(2){border-right:none;}
  .assurance-item:nth-child(1),.assurance-item:nth-child(2){border-bottom:1px solid var(--line-light);}
  .news-wrap{grid-template-columns:1fr;}
  .cta-band{grid-template-columns:1fr;padding:40px 28px;}
  .cta-media img{height:200px;opacity:.55;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .dots{display:flex;}
}
@media (max-width:768px){
  .section{padding:var(--sec-mobile) 0;}
  .section-head{flex-direction:column;align-items:flex-start;margin-bottom:30px;}
  .entry-grid{grid-template-columns:1fr;}
  .entry-card--feature{grid-column:span 1;}
  .entry-card--feature .thumb{aspect-ratio:16/10;}
  .hero-points{gap:20px;}
  .hero-point b{font-size:22px;}
  .float-card--a{right:12px;top:16px;padding:10px 12px;}
  .float-card--b{right:12px;bottom:16px;padding:10px 12px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .testi-card{flex:0 0 82%;}
}
@media (max-width:520px){
  .hero-actions .btn{width:100%;}
  .cta-actions .btn{width:100%;}
  .assurance{grid-template-columns:1fr;}
  .assurance-item{border-right:none;border-bottom:1px solid var(--line-light);}
  .assurance-item:last-child{border-bottom:none;}
  .entry-card .body{padding:18px;}
  .news-item{padding:16px;}
}

/* roulang page: category1 */
:root{
  --sky-900:#0B0916;
  --sky-800:#14102A;
  --sky-700:#1E1838;
  --violet-600:#4B3A8F;
  --violet-500:#6B54C4;
  --aurora-400:#35E0C8;
  --amber-400:#FFC24B;
  --ink-050:#F6F4FB;
  --ink-000:#FFFFFF;
  --line-light:#E4DFF2;
  --text-dark:#1A1530;
  --text-muted-dark:#6B6585;
  --text-light:#EDEAF7;
  --text-muted-light:#A79FC4;
  --line-dark:rgba(255,255,255,.10);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --radius-pill:999px;
  --radius-card:18px;
  --radius-img:12px;
  --radius-badge:6px;
  --radius-cta:24px;
  --shadow-card:0 8px 24px rgba(75,58,143,.10);
  --shadow-card-hover:0 14px 32px rgba(75,58,143,.16);
  --sec:96px;
  --header-h:64px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--text-dark);
  background:var(--ink-050);
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color 180ms ease,text-decoration-color 180ms ease;}
a:hover{color:var(--violet-500);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px;text-decoration-color:var(--aurora-400);}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none;}
input{font:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-family:var(--font-serif);color:var(--text-dark);letter-spacing:.01em;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
:focus-visible{outline:2px solid var(--aurora-400);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media(min-width:1440px){.container{max-width:1320px;}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(11,9,22,.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:background 220ms ease,border-color 220ms ease;
}
.site-header.is-scrolled{
  background:rgba(11,9,22,.95);
  border-bottom-color:var(--line-dark);
}
.header-inner{
  display:flex;align-items:center;gap:20px;
  height:var(--header-h);
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand svg{width:26px;height:26px;flex-shrink:0;}
.brand-name{
  font-family:var(--font-serif);
  font-weight:700;font-size:17px;letter-spacing:.01em;
  color:var(--text-light);white-space:nowrap;
}
.brand:hover{text-decoration:none;}
.brand:hover .brand-name{color:var(--aurora-400);}
.nav-links{display:flex;align-items:center;gap:26px;margin-right:auto;}
.nav-link{
  position:relative;
  font-size:15px;font-weight:500;line-height:1;
  color:var(--text-muted-light);
  padding:8px 2px;
}
.nav-link:hover{color:var(--text-light);text-decoration:none;}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--aurora-400);border-radius:2px;
  transform:scaleX(0);transform-origin:left;
  transition:transform 200ms ease;
}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--text-light);}
.nav-link.is-active::after{transform:scaleX(1);}
.header-right{display:flex;align-items:center;gap:12px;}
.search-box{
  display:flex;align-items:center;gap:8px;
  width:200px;height:38px;padding:0 14px;
  border-radius:var(--radius-pill);
  background:rgba(255,255,255,.06);
  border:1px solid var(--line-dark);
  transition:border-color 180ms ease,background 180ms ease;
}
.search-box:focus-within{border-color:var(--aurora-400);background:rgba(255,255,255,.10);}
.search-box svg{width:15px;height:15px;flex-shrink:0;color:var(--text-muted-light);}
.search-box input{
  width:100%;border:0;background:transparent;outline:none;
  color:var(--text-light);font-size:14px;
}
.search-box input::placeholder{color:var(--text-muted-light);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-pill);
  font-weight:600;font-size:15px;line-height:1;
  padding:13px 26px;
  border:1px solid transparent;
  transition:transform 180ms ease,box-shadow 180ms ease,background 180ms ease,color 180ms ease,border-color 180ms ease;
  white-space:nowrap;
}
.btn:hover{text-decoration:none;transform:translateY(-1px);}
.btn:active{transform:translateY(1px);filter:brightness(.96);}
.btn-primary{background:var(--aurora-400);color:var(--sky-900);}
.btn-primary:hover{background:#4dedd6;color:var(--sky-900);box-shadow:0 0 0 4px rgba(53,224,200,.18);}
.btn-outline{background:transparent;color:var(--text-light);border-color:rgba(255,255,255,.28);}
.btn-outline:hover{color:var(--text-light);border-color:var(--aurora-400);box-shadow:0 0 0 4px rgba(53,224,200,.14);}
.btn-outline-dark{background:transparent;color:var(--text-dark);border-color:var(--line-light);}
.btn-outline-dark:hover{color:var(--violet-600);border-color:var(--violet-500);box-shadow:0 0 0 4px rgba(107,84,196,.12);}
.btn-sm{padding:10px 20px;font-size:14px;}
.btn-block{width:100%;}
.hamburger{
  display:none;width:40px;height:40px;border-radius:12px;
  align-items:center;justify-content:center;
  border:1px solid var(--line-dark);background:rgba(255,255,255,.05);
}
.hamburger span{display:block;width:18px;height:2px;background:var(--text-light);border-radius:2px;position:relative;}
.hamburger span::before,.hamburger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text-light);border-radius:2px;
}
.hamburger span::before{top:-6px;}
.hamburger span::after{top:6px;}
.drawer-mask{
  position:fixed;inset:0;background:rgba(11,9,22,.6);
  opacity:0;visibility:hidden;transition:opacity 220ms ease,visibility 220ms ease;
  z-index:70;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(86vw,360px);
  background:var(--sky-900);
  border-left:1px solid var(--line-dark);
  z-index:80;
  padding:76px 24px 24px;
  display:flex;flex-direction:column;gap:6px;
  transform:translateX(102%);
  transition:transform 260ms ease;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer a.drawer-link{
  font-family:var(--font-serif);
  font-size:21px;font-weight:700;color:var(--text-light);
  padding:14px 0;border-bottom:1px solid var(--line-dark);
}
.drawer a.drawer-link.is-active{color:var(--aurora-400);}
.drawer a.drawer-link:hover{text-decoration:none;color:var(--aurora-400);}
.drawer .drawer-cta{margin-top:22px;}

/* ---------- page head ---------- */
.page-head{
  position:relative;
  padding:56px 0 44px;
  background-color:var(--ink-050);
  background-image:radial-gradient(rgba(75,58,143,.13) 1px, transparent 1.3px);
  background-size:24px 24px;
  border-bottom:1px solid var(--line-light);
  overflow:hidden;
}
.page-head::after{
  content:"";position:absolute;right:-120px;top:-140px;width:420px;height:420px;
  border-radius:50%;
  border:1px solid rgba(75,58,143,.14);
  pointer-events:none;
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;line-height:1.7;color:var(--text-muted-dark);
  margin-bottom:20px;
}
.breadcrumb a{color:var(--text-muted-dark);}
.breadcrumb a:hover{color:var(--violet-500);}
.breadcrumb .sep{color:#B9B2CE;}
.breadcrumb .current{color:var(--text-dark);font-weight:600;}
.page-head h1{
  font-size:clamp(30px,4.4vw,46px);
  font-weight:800;line-height:1.18;
  max-width:900px;
}
.page-head .lede{
  margin-top:16px;
  max-width:720px;
  font-size:16px;
  color:var(--text-muted-dark);
}
.page-head .head-meta{
  margin-top:22px;display:flex;flex-wrap:wrap;gap:10px;
}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 14px;border-radius:var(--radius-pill);
  font-size:13px;font-weight:500;
  background:var(--ink-000);
  border:1px solid var(--line-light);
  color:var(--text-muted-dark);
}
.chip.is-current{
  border-color:var(--aurora-400);
  color:var(--violet-600);
  background:rgba(53,224,200,.10);
}
.chip-num{
  font-variant-numeric:tabular-nums;
  color:#9A6A00;
  font-weight:700;
}

/* ---------- sections ---------- */
section{position:relative;}
.sec{padding:var(--sec) 0;}
.sec-tight{padding:calc(var(--sec) * .72) 0;}
.sec-head{max-width:780px;margin-bottom:40px;}
.sec-head h2{
  font-size:clamp(24px,3vw,34px);
  font-weight:700;line-height:1.28;
}
.sec-head p{margin-top:14px;color:var(--text-muted-dark);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--violet-600);
  margin-bottom:12px;
}
.eyebrow::before{
  content:"";width:18px;height:2px;border-radius:2px;background:var(--aurora-400);
}

/* ---------- guide hero ---------- */
.guide-hero{
  background:
    radial-gradient(900px 420px at 88% 0%, rgba(75,58,143,.55), transparent 62%),
    var(--sky-900);
  color:var(--text-light);
  padding:64px 0;
  overflow:hidden;
}
.guide-hero h2{
  color:var(--text-light);
  font-size:clamp(24px,3vw,34px);
  font-weight:700;line-height:1.3;
  max-width:560px;
}
.guide-hero p{color:var(--text-muted-light);margin-top:16px;max-width:560px;}
.guide-hero .eyebrow{color:var(--aurora-400);}
.hero-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
}

.local-hero-visual{
  position:relative;
  min-height:400px;
  border-radius:20px;
  overflow:hidden;
  border:1px solid var(--line-dark);
}
.local-hero-visual img{
  width:100%;height:100%;min-height:400px;object-fit:cover;
  opacity:.9;
}
.local-hero-visual::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg, rgba(11,9,22,.92) 0%, rgba(11,9,22,.25) 46%, rgba(11,9,22,.15) 100%);
  z-index:1;
}
.float-card{
  position:absolute;z-index:2;
  display:flex;align-items:center;gap:10px;
  padding:10px 14px;border-radius:14px;
  background:rgba(20,16,42,.86);
  border:1px solid var(--line-dark);
  font-size:13px;color:var(--text-light);
  backdrop-filter:blur(6px);
}
.float-card small{display:block;font-size:12px;color:var(--text-muted-light);line-height:1.5;}
.float-card.a{left:20px;bottom:26px;}
.float-card.b{right:20px;top:26px;}
.pulse{
  width:8px;height:8px;border-radius:50%;background:var(--aurora-400);flex-shrink:0;
  box-shadow:0 0 0 0 rgba(53,224,200,.5);
  animation:pulse 2.4s infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(53,224,200,.45);}
  70%{box-shadow:0 0 0 10px rgba(53,224,200,0);}
  100%{box-shadow:0 0 0 0 rgba(53,224,200,0);}
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}

/* ---------- steps grid ---------- */
.steps-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:24px;
}
.step-card{
  display:flex;gap:20px;
  background:var(--ink-000);
  border:1px solid var(--line-light);
  border-radius:var(--radius-card);
  padding:28px 26px;
  box-shadow:var(--shadow-card);
  transition:transform 220ms ease,box-shadow 220ms ease,border-color 220ms ease;
}
.step-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-card-hover);
  border-color:var(--aurora-400);
}
.step-num{
  font-family:var(--font-serif);
  font-size:34px;font-weight:700;line-height:1;
  color:var(--amber-400);
  font-variant-numeric:tabular-nums;
  flex-shrink:0;
  padding-top:2px;
  text-shadow:0 1px 0 rgba(154,106,0,.12);
}
.step-body h3{
  font-size:19px;font-weight:600;line-height:1.4;
  margin-bottom:10px;
}
.step-body p{font-size:15px;color:var(--text-muted-dark);margin-bottom:14px;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--violet-600);
}
.text-link::after{content:"→";transition:transform 180ms ease;}
.text-link:hover{color:var(--violet-600);}
.text-link:hover::after{transform:translateX(3px);}

/* ---------- checklist band ---------- */
.check-band{
  background:var(--ink-000);
  border-top:1px solid var(--line-light);
  border-bottom:1px solid var(--line-light);
}
.check-grid{
  display:grid;grid-template-columns:0.9fr 1.1fr;gap:56px;align-items:start;
}
.check-list{
  border-top:1px solid var(--line-light);
}
.check-item{
  display:grid;grid-template-columns:auto 1fr auto;
  gap:18px;align-items:center;
  padding:20px 4px;
  border-bottom:1px solid var(--line-light);
  transition:background 180ms ease,padding-left 180ms ease;
}
.check-item:hover{background:rgba(53,224,200,.06);padding-left:12px;}
.check-bar{
  width:6px;height:34px;border-radius:4px;background:var(--violet-500);flex-shrink:0;
}
.check-item strong{
  display:block;font-family:var(--font-sans);font-size:16px;font-weight:600;color:var(--text-dark);
}
.check-item span.desc{display:block;font-size:14px;color:var(--text-muted-dark);}
.check-tag{
  font-size:12px;font-weight:600;padding:5px 11px;border-radius:var(--radius-badge);
  border:1px solid var(--line-light);color:var(--text-muted-dark);
  background:var(--ink-050);white-space:nowrap;
}
.check-tag.ok{border-color:rgba(53,224,200,.5);color:#0B6B5E;background:rgba(53,224,200,.10);}
.check-tag.warn{border-color:rgba(255,194,75,.55);color:#8A6100;background:rgba(255,194,75,.12);}
.check-figure{border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line-light);}
.check-figure img{width:100%;aspect-ratio:16/11;object-fit:cover;}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:12px;max-width:900px;}
.faq-item{
  border:1px solid var(--line-light);
  border-radius:14px;
  background:var(--ink-000);
  overflow:hidden;
  transition:border-color 200ms ease,box-shadow 200ms ease;
}
.faq-item.is-open{
  border-color:rgba(53,224,200,.6);
  box-shadow:0 10px 26px rgba(75,58,143,.10);
}
.faq-item.is-open .faq-q::before{transform:scaleY(1);}
.faq-q{
  position:relative;
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  text-align:left;
  padding:20px 22px 20px 26px;
  font-size:16px;font-weight:600;line-height:1.6;color:var(--text-dark);
}
.faq-q::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;
  background:var(--aurora-400);border-radius:0 3px 3px 0;
  transform:scaleY(0);transition:transform 200ms ease;
}
.faq-q .sign{
  flex-shrink:0;width:22px;height:22px;position:relative;
  transition:transform 220ms ease;
}
.faq-q .sign::before,.faq-q .sign::after{
  content:"";position:absolute;background:var(--violet-600);border-radius:2px;
}
.faq-q .sign::before{left:2px;right:2px;top:10px;height:2px;}
.faq-q .sign::after{top:2px;bottom:2px;left:10px;width:2px;transition:opacity 200ms ease;}
.faq-item.is-open .sign{transform:rotate(180deg);}
.faq-item.is-open .sign::after{opacity:0;}
.faq-a{
  display:grid;grid-template-rows:0fr;
  transition:grid-template-rows 260ms ease;
}
.faq-item.is-open .faq-a{grid-template-rows:1fr;}
.faq-a-inner{overflow:hidden;}
.faq-a p{
  padding:0 26px 22px;
  font-size:15px;line-height:1.85;color:var(--text-muted-dark);
}

/* ---------- soft cta ---------- */
.cta-soft{
  background:var(--ink-050);
  padding-bottom:calc(var(--sec) * .9);
}
.cta-soft-card{
  display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center;
  background:var(--ink-000);
  border:1px solid var(--line-light);
  border-radius:var(--radius-cta);
  padding:40px 44px;
  box-shadow:var(--shadow-card);
}
.cta-soft-card h2{font-size:clamp(21px,2.4vw,27px);font-weight:700;line-height:1.35;}
.cta-soft-card p{margin-top:10px;color:var(--text-muted-dark);font-size:15px;}
.cta-soft-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- footer ---------- */
.site-footer{
  background:var(--sky-900);
  color:var(--text-muted-light);
  border-top:1px solid var(--line-dark);
  padding:72px 0 32px;
  font-size:14px;
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--text-muted-light);max-width:280px;}
.footer-col h4{
  font-family:var(--font-sans);
  font-size:14px;font-weight:700;color:var(--text-light);
  margin-bottom:16px;letter-spacing:.02em;
}
.footer-col ul{display:grid;gap:10px;}
.footer-col li a,.footer-col li span{color:var(--text-muted-light);font-size:14px;}
.footer-col li a:hover{color:var(--aurora-400);text-decoration:none;}
.footer-bottom{
  margin-top:48px;padding-top:22px;
  border-top:1px solid var(--line-dark);
  display:flex;flex-wrap:wrap;gap:14px 24px;align-items:center;justify-content:space-between;
  font-size:13px;color:#877F A0;
  color:#877fa0;
}
.footer-bottom a{color:var(--aurora-400);}

/* ---------- responsive ---------- */
@media(max-width:1280px){
  .search-box{width:170px;}
}
@media(max-width:1024px){
  :root{--sec:72px;--header-h:64px;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .local-hero-visual{min-height:320px;}
  .local-hero-visual img{min-height:320px;}
  .steps-grid{grid-template-columns:1fr;}
  .check-grid{grid-template-columns:1fr;gap:36px;}
  .cta-soft-card{grid-template-columns:1fr;padding:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media(max-width:820px){
  .nav-links{display:none;}
  .search-box{display:none;}
  .hamburger{display:flex;}
  .header-right .btn-primary{display:none;}
}
@media(max-width:768px){
  :root{--sec:56px;--header-h:56px;}
  body{font-size:16px;}
  .page-head{padding:40px 0 34px;}
  .step-card{padding:24px 20px;gap:16px;}
  .step-num{font-size:28px;}
  .check-item{grid-template-columns:auto 1fr;row-gap:8px;}
  .check-item .check-tag{grid-column:2;justify-self:start;}
  .faq-q{padding:18px 18px 18px 22px;font-size:15px;}
  .faq-a p{padding:0 22px 20px;}
  .cta-soft-card{padding:28px 22px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{justify-content:flex-start;}
}
@media(max-width:520px){
  .brand-name{font-size:15px;}
  .btn{padding:12px 20px;font-size:14px;}
  .hero-actions .btn{width:100%;}
  .float-card{position:static;margin:12px;display:none;}
  .cta-soft-actions .btn{width:100%;}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
}

/* roulang page: article */
:root{
  --sky-900:#0B0916;
  --sky-800:#14102A;
  --sky-700:#1E1838;
  --violet-600:#4B3A8F;
  --violet-500:#6B54C4;
  --aurora-400:#35E0C8;
  --amber-400:#FFC24B;
  --ink-050:#F6F4FB;
  --ink-000:#FFFFFF;
  --line-light:#E4DFF2;
  --line-dark:rgba(255,255,255,.10);
  --text-dark:#1A1530;
  --text-muted-dark:#6B6585;
  --text-light:#EDEAF7;
  --text-muted-light:#A79FC4;
  --radius-pill:999px;
  --radius-card:18px;
  --radius-img:12px;
  --radius-badge:6px;
  --shadow-card:0 8px 24px rgba(75,58,143,.10);
  --shadow-card-hover:0 14px 32px rgba(75,58,143,.16);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --space-section:96px;
  --header-h:64px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--text-dark);
  background:var(--ink-050);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--violet-600);text-decoration:none;transition:color 180ms ease,text-decoration-color 180ms ease}
a:hover{color:var(--aurora-400);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:2px}
h1,h2,h3,h4{font-family:var(--font-serif);color:var(--text-dark);letter-spacing:.01em;margin:0}
h1{font-size:clamp(30px,4.4vw,54px);font-weight:800;line-height:1.18}
h2{font-size:clamp(24px,3vw,36px);font-weight:700;line-height:1.28}
h3{font-size:clamp(19px,2vw,23px);font-weight:600;line-height:1.4}
p{margin:0 0 1.2em}
ul,ol{margin:0 0 1.2em;padding-left:1.3em}
button,input,textarea,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--aurora-400);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1440px){.container{max-width:1320px}}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform 180ms ease,box-shadow 180ms ease,background 180ms ease,color 180ms ease,border-color 180ms ease;
  white-space:nowrap;
}
.btn:hover{text-decoration:none}
.btn:active{transform:translateY(1px);filter:brightness(.96)}
.btn-primary{background:var(--aurora-400);color:#062B26}
.btn-primary:hover{background:#4FF0DA;color:#062B26;box-shadow:0 0 0 4px rgba(53,224,200,.18)}
.btn-ghost{background:transparent;color:var(--text-light);border-color:var(--line-dark)}
.btn-ghost:hover{border-color:var(--aurora-400);color:var(--aurora-400);box-shadow:0 0 0 4px rgba(53,224,200,.14)}
.btn-outline{background:var(--ink-000);color:var(--violet-600);border-color:var(--line-light)}
.btn-outline:hover{border-color:var(--aurora-400);color:var(--violet-600);box-shadow:0 0 0 4px rgba(53,224,200,.14)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn[disabled],.btn.is-loading{opacity:.55;cursor:not-allowed;transform:none;box-shadow:none}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:60;
  height:var(--header-h);
  background:rgba(11,9,22,.72);
  border-bottom:1px solid transparent;
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  transition:background 220ms ease,border-color 220ms ease;
}
.site-header.is-scrolled{background:rgba(11,9,22,.94);border-bottom-color:var(--line-dark)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:var(--header-h)}
.header-left{display:flex;align-items:center;gap:28px;min-width:0}
.header-right{display:flex;align-items:center;gap:12px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text-light);flex-shrink:0}
.brand:hover{color:var(--text-light);text-decoration:none}
.brand svg{width:26px;height:26px;flex-shrink:0}
.brand-name{font-family:var(--font-serif);font-weight:700;font-size:18px;letter-spacing:.01em;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:24px}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--text-muted-light);
  padding:6px 0;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--aurora-400);transform:scaleX(0);transform-origin:left;transition:transform 200ms ease;
}
.nav-link:hover{color:var(--text-light);text-decoration:none}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--text-light)}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-search{
  display:flex;align-items:center;gap:8px;
  height:40px;width:200px;padding:0 16px;
  border-radius:var(--radius-pill);
  background:rgba(255,255,255,.06);
  border:1px solid var(--line-dark);
  transition:border-color 180ms ease,background 180ms ease;
}
.nav-search:focus-within{border-color:var(--violet-500);background:rgba(255,255,255,.10)}
.nav-search input{
  width:100%;border:0;background:transparent;outline:none;
  font-size:14px;color:var(--text-light);
}
.nav-search input::placeholder{color:var(--text-muted-light)}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:var(--radius-pill);
  border:1px solid var(--line-dark);background:transparent;cursor:pointer;
  padding:0;align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:16px;height:2px;border-radius:2px;background:var(--text-light);transition:transform 220ms ease,opacity 220ms ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.drawer{
  position:fixed;inset:var(--header-h) 0 0 0;z-index:55;
  background:rgba(11,9,22,.98);
  display:flex;flex-direction:column;justify-content:space-between;
  padding:40px 24px 32px;
  transform:translateY(-8px);opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity 220ms ease,transform 220ms ease,visibility 220ms ease;
}
.drawer.is-open{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0)}
.drawer-nav{display:flex;flex-direction:column;gap:6px}
.drawer-link{
  font-family:var(--font-serif);font-size:26px;font-weight:700;color:var(--text-light);
  padding:14px 0;border-bottom:1px solid var(--line-dark);
}
.drawer-link:hover,.drawer-link.is-active{color:var(--aurora-400);text-decoration:none}
.drawer-cta{width:100%}

/* 浅底星点 */
.starfield-light{position:relative;overflow:hidden}
.starfield-light::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    radial-gradient(rgba(75,58,143,.55) 1px,transparent 1.4px),
    radial-gradient(rgba(75,58,143,.35) 1px,transparent 1.4px);
  background-size:130px 130px,84px 84px;
  background-position:0 0,44px 32px;
  opacity:.10;
}
.starfield-light > *{position:relative;z-index:1}

/* 面包屑 */
.breadcrumb{
  font-size:13px;color:var(--text-muted-dark);
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:20px 0 0;
}
.breadcrumb a{color:var(--text-muted-dark)}
.breadcrumb a:hover{color:var(--violet-600)}
.breadcrumb .sep{opacity:.6}
.breadcrumb .current{color:var(--text-dark)}

/* 文章头部 */
.article-hero{
  background:var(--ink-050);
  border-bottom:1px solid var(--line-light);
  padding-bottom:40px;
}
.article-head{max-width:820px;padding-top:22px}
.category-badge{
  display:inline-flex;align-items:center;gap:6px;
  height:28px;padding:0 12px;border-radius:var(--radius-badge);
  background:rgba(255,194,75,.14);
  border:1px solid rgba(255,194,75,.55);
  color:#8A5B00;font-size:13px;font-weight:600;
}
.article-head h1{margin:18px 0 18px;word-break:break-word}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;
  font-size:13px;color:var(--text-muted-dark);line-height:1.7;
}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:var(--line-light)}
.meta-row a{color:var(--text-muted-dark)}
.meta-row a:hover{color:var(--violet-600)}
.meta-row time{font-variant-numeric:tabular-nums}

/* 正文布局 */
.article-section{padding:56px 0 var(--space-section)}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;align-items:start}
.article-main{min-width:0}
.article-card{
  background:var(--ink-000);
  border:1px solid var(--line-light);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  padding:clamp(24px,4vw,48px);
}
.rich-text{
  font-size:17px;line-height:1.9;color:var(--text-dark);
  max-width:780px;margin:0 auto;
  word-break:break-word;overflow-wrap:anywhere;
}
.rich-text > *:first-child{margin-top:0}
.rich-text p{margin:0 0 1.2em}
.rich-text h2{
  font-size:22px;font-weight:700;line-height:1.45;
  margin:2em 0 .9em;padding-left:14px;position:relative;
}
.rich-text h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:3px;border-radius:3px;
  background:var(--aurora-400);
}
.rich-text h3{font-size:18px;font-weight:600;margin:1.6em 0 .7em}
.rich-text h4{font-size:16px;font-weight:600;margin:1.4em 0 .6em;color:var(--violet-600)}
.rich-text ul,.rich-text ol{padding-left:1.4em}
.rich-text li{margin:0 0 .5em}
.rich-text li::marker{color:var(--violet-500)}
.rich-text blockquote{
  margin:1.6em 0;padding:14px 20px;
  border-left:3px solid var(--violet-500);
  background:var(--ink-050);
  border-radius:0 var(--radius-img) var(--radius-img) 0;
  color:var(--text-muted-dark);font-size:16px;
}
.rich-text blockquote p:last-child{margin-bottom:0}
.rich-text a{color:var(--violet-600);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.rich-text a:hover{color:#0F9C89}
.rich-text img{border-radius:var(--radius-img);margin:1.6em auto;max-width:100%;height:auto}
.rich-text figure{margin:1.6em 0}
.rich-text figcaption{
  text-align:center;font-size:13px;color:var(--text-muted-dark);
  margin-top:10px;line-height:1.7;
}
.rich-text table{
  display:block;width:100%;max-width:100%;overflow-x:auto;
  border-collapse:collapse;font-size:15px;margin:1.6em 0;
  border:1px solid var(--line-light);border-radius:var(--radius-img);
}
.rich-text th,.rich-text td{padding:10px 14px;border-bottom:1px solid var(--line-light);text-align:left;white-space:nowrap}
.rich-text th{background:var(--ink-050);font-weight:600;color:var(--text-dark)}
.rich-text tr:last-child td{border-bottom:0}
.rich-text pre{
  background:var(--sky-900);color:var(--text-light);
  border-radius:var(--radius-img);padding:16px 18px;overflow-x:auto;
  font-size:14px;line-height:1.7;margin:1.6em 0;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.rich-text code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.92em;background:rgba(75,58,143,.10);
  padding:2px 6px;border-radius:5px;color:#3B2C7A;
}
.rich-text pre code{background:transparent;color:inherit;padding:0}
.rich-text hr{border:0;border-top:1px solid var(--line-light);margin:2em 0}

/* 空态 */
.is-empty-state{
  max-width:780px;margin:0 auto;text-align:center;
  padding:48px 24px;border:1px dashed var(--line-light);border-radius:var(--radius-card);
  background:var(--ink-050);
}
.is-empty-state .empty-icon{
  width:48px;height:48px;margin:0 auto 16px;border-radius:50%;
  border:1px solid var(--line-light);display:flex;align-items:center;justify-content:center;
  color:var(--violet-500);
}
.is-empty-state h2{font-size:22px;margin-bottom:10px}
.is-empty-state p{color:var(--text-muted-dark);margin-bottom:22px}

/* 标签 chips */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;max-width:780px;margin:32px auto 0}
.chip{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;
  border-radius:var(--radius-pill);border:1px solid var(--line-light);
  background:var(--ink-050);font-size:13px;color:var(--text-muted-dark);
  transition:border-color 180ms ease,color 180ms ease,background 180ms ease;
}
.chip:hover{border-color:var(--aurora-400);color:var(--violet-600);text-decoration:none;background:var(--ink-000)}
.chip.is-current{border-color:var(--aurora-400);color:var(--violet-600);background:var(--ink-000)}

/* 上一篇 / 下一篇 */
.pager{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;
  max-width:780px;margin:36px auto 0;
}
.pager-card{
  display:block;background:var(--ink-000);border:1px solid var(--line-light);
  border-radius:var(--radius-card);padding:18px 20px;
  box-shadow:var(--shadow-card);transition:transform 220ms ease,box-shadow 220ms ease,border-color 220ms ease;
}
.pager-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-hover);border-color:var(--aurora-400);text-decoration:none}
.pager-card .pager-label{font-size:12px;color:var(--text-muted-dark);letter-spacing:.04em}
.pager-card strong{display:block;font-family:var(--font-serif);font-size:16px;color:var(--text-dark);margin-top:6px;line-height:1.5}
.pager-card:hover strong{color:var(--violet-600)}

/* 相关推荐 */
.related{padding-top:56px}
.related-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:24px}
.related-head h2{font-size:clamp(20px,2.4vw,26px)}
.related-head a{font-size:14px;font-weight:600}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.post-card{
  display:flex;flex-direction:column;background:var(--ink-000);
  border:1px solid var(--line-light);border-radius:var(--radius-card);overflow:hidden;
  box-shadow:var(--shadow-card);transition:transform 220ms ease,box-shadow 220ms ease,border-color 220ms ease;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-hover);border-color:var(--aurora-400);text-decoration:none}
.post-card .thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:linear-gradient(135deg,var(--violet-600),var(--sky-800))}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform 220ms ease}
.post-card:hover .thumb img{transform:scale(1.04)}
.post-card .thumb .tag{
  position:absolute;left:12px;top:12px;
  height:24px;padding:0 10px;border-radius:var(--radius-badge);
  background:rgba(11,9,22,.78);color:var(--amber-400);
  font-size:12px;display:inline-flex;align-items:center;
  border:1px solid rgba(255,194,75,.5);
}
.post-card .card-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-card h3{font-size:17px;line-height:1.5;color:var(--text-dark)}
.post-card .card-text{font-size:14px;color:var(--text-muted-dark);line-height:1.7;margin:0}
.post-card .card-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:12.5px;color:var(--text-muted-dark);
}
.post-card .arrow{color:var(--violet-500);font-weight:700}

/* 侧栏 */
.article-aside{position:sticky;top:calc(var(--header-h) + 20px);display:flex;flex-direction:column;gap:20px}
.aside-card{
  background:var(--ink-000);border:1px solid var(--line-light);
  border-radius:var(--radius-card);padding:20px 22px;box-shadow:var(--shadow-card);
}
.aside-card h3{
  font-size:14px;font-weight:700;letter-spacing:.06em;color:var(--text-muted-dark);
  margin-bottom:14px;text-transform:none;
}
.toc-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px}
.toc-list a{
  display:block;font-size:14px;line-height:1.6;color:var(--text-muted-dark);
  padding:6px 0 6px 12px;border-left:2px solid var(--line-light);
}
.toc-list a:hover,.toc-list a.is-current{color:var(--violet-600);border-left-color:var(--aurora-400);text-decoration:none}
.aside-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.aside-list a{
  display:flex;align-items:center;gap:10px;
  font-size:14px;color:var(--text-dark);padding:9px 0;
  border-bottom:1px solid var(--line-light);
}
.aside-list li:last-child a{border-bottom:0}
.aside-list a:hover{color:var(--violet-600);text-decoration:none}
.aside-num{
  font-variant-numeric:tabular-nums;color:var(--amber-400);font-weight:700;font-size:13px;flex-shrink:0;
}
.aside-hint{font-size:13px;color:var(--text-muted-dark);line-height:1.8;margin:0}
.aside-card.dark{
  background:linear-gradient(160deg,var(--violet-600),var(--sky-900));
  border-color:transparent;color:var(--text-light);
}
.aside-card.dark h3{color:var(--text-muted-light)}
.aside-card.dark p{color:var(--text-light);font-size:14px;line-height:1.8;margin:0 0 16px}

/* 页脚 */
.site-footer{background:var(--sky-900);color:var(--text-light);border-top:1px solid var(--line-dark);padding:72px 0 28px;margin-top:var(--space-section)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand .brand{margin-bottom:14px}
.footer-brand p{font-size:14px;color:var(--text-muted-light);line-height:1.8;max-width:320px;margin:0}
.footer-col h4{
  font-family:var(--font-sans);font-size:14px;font-weight:600;color:var(--text-light);
  margin-bottom:14px;letter-spacing:.04em;
}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.footer-col a,.footer-col span{font-size:14px;color:var(--text-muted-light);line-height:1.7}
.footer-col a:hover{color:var(--aurora-400);text-decoration:none}
.footer-bottom{
  margin-top:56px;padding-top:22px;border-top:1px solid var(--line-dark);
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 24px;
  font-size:13px;color:var(--text-muted-light);
}
.footer-bottom a{color:var(--text-muted-light)}
.footer-bottom a:hover{color:var(--aurora-400)}

@media (max-width:1280px){
  .article-layout{grid-template-columns:minmax(0,1fr) 280px;gap:36px}
}
@media (max-width:1024px){
  :root{--space-section:72px}
  .nav-links,.nav-search{display:none}
  .nav-toggle{display:inline-flex}
  .article-layout{grid-template-columns:minmax(0,1fr)}
  .article-aside{position:static}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  :root{--space-section:56px}
  .container{padding:0 20px}
  .header-left{gap:16px}
  .brand-name{font-size:16px}
  .article-section{padding:36px 0 var(--space-section)}
  .pager{grid-template-columns:minmax(0,1fr)}
  .related-grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:1fr;gap:0}
  .footer-col{border-bottom:1px solid var(--line-dark)}
  .footer-col h4{margin:0;padding:16px 0;cursor:pointer;display:flex;align-items:center;justify-content:space-between}
  .footer-col h4::after{content:"＋";font-size:14px;color:var(--text-muted-light)}
  .footer-col.is-open h4::after{content:"－"}
  .footer-col ul{max-height:0;overflow:hidden;transition:max-height 260ms ease;padding-bottom:0}
  .footer-col.is-open ul{max-height:320px;padding-bottom:16px}
  .footer-brand{padding-bottom:20px;border-bottom:1px solid var(--line-dark)}
}
@media (max-width:520px){
  body{font-size:15.5px}
  .article-card{padding:22px 18px}
  .rich-text{font-size:16.5px}
  .rich-text h2{font-size:20px}
  .article-head h1{font-size:clamp(26px,7vw,34px)}
  .btn{width:100%}
  .header-right .btn{width:auto}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}

/* roulang page: category2 */
:root{
  --sky-900:#0B0916;
  --sky-800:#14102A;
  --sky-700:#1E1838;
  --violet-600:#4B3A8F;
  --violet-500:#6B54C4;
  --aurora-400:#35E0C8;
  --amber-400:#FFC24B;
  --ink-050:#F6F4FB;
  --ink-000:#FFFFFF;
  --line-light:#E4DFF2;
  --text-dark:#1A1530;
  --text-muted-dark:#6B6585;
  --text-light:#EDEAF7;
  --text-muted-light:#A79FC4;
  --line-dark:rgba(255,255,255,.10);
  --radius-pill:999px;
  --radius-card:18px;
  --radius-img:12px;
  --radius-badge:6px;
  --radius-cta:24px;
  --shadow-card:0 8px 24px rgba(75,58,143,.10);
  --shadow-card-hover:0 14px 32px rgba(75,58,143,.16);
  --font-display:"Noto Serif SC","Source Han Serif SC",Georgia,serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --space-section:96px;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.85;
  color:var(--text-dark);
  background:var(--ink-050);
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s ease,border-color .18s ease;}
a:hover{color:var(--violet-500);}
h1,h2,h3,h4{font-family:var(--font-display);margin:0;color:var(--text-dark);letter-spacing:.01em;}
h1{font-size:clamp(30px,4.4vw,54px);font-weight:800;line-height:1.18;}
h2{font-size:clamp(24px,3vw,36px);font-weight:700;line-height:1.28;}
h3{font-size:clamp(20px,2vw,24px);font-weight:600;line-height:1.4;font-family:var(--font-body);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button,input,textarea{font-family:inherit;font-size:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--aurora-400);outline-offset:2px;border-radius:4px;}
.container{max-width:var(--container);margin:0 auto;padding:0 20px;}
@media (min-width:1440px){.container{max-width:1320px;}}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(11,9,22,.92);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{
  background:rgba(11,9,22,.97);
  border-bottom-color:var(--line-dark);
  box-shadow:0 10px 30px rgba(11,9,22,.35);
}
.header-inner{
  height:64px;display:flex;align-items:center;gap:18px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand svg{width:26px;height:26px;flex-shrink:0;}
.brand-name{
  font-family:var(--font-display);font-weight:700;font-size:18px;
  color:var(--text-light);letter-spacing:.01em;white-space:nowrap;
}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:14px;flex:1 1 auto;min-width:0;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:15px;font-weight:500;
  color:var(--text-muted-light);
  white-space:nowrap;
  border-radius:8px;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--aurora-400);border-radius:2px;
  transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-link:hover{color:var(--text-light);}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--ink-000);}
.nav-utility{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.nav-search{
  display:flex;align-items:center;gap:8px;
  width:200px;height:38px;padding:0 14px;
  border-radius:var(--radius-pill);
  background:rgba(255,255,255,.06);
  border:1px solid var(--line-dark);
}
.nav-search svg{width:16px;height:16px;flex-shrink:0;stroke:var(--text-muted-light);}
.nav-search input{
  width:100%;border:0;background:transparent;color:var(--text-light);font-size:14px;outline:none;
}
.nav-search input::placeholder{color:var(--text-muted-light);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;cursor:pointer;
  font-size:15px;font-weight:600;line-height:1;
  padding:12px 22px;border-radius:var(--radius-pill);
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{background:var(--aurora-400);color:#06231F;}
.btn-primary:hover{background:#4DECD6;color:#06231F;box-shadow:0 0 0 4px rgba(53,224,200,.18);}
.btn-ghost{background:transparent;color:var(--text-light);border-color:rgba(255,255,255,.28);}
.btn-ghost:hover{color:var(--aurora-400);border-color:var(--aurora-400);box-shadow:0 0 0 4px rgba(53,224,200,.14);}
.btn-outline-light{background:transparent;color:var(--text-light);border-color:rgba(255,255,255,.32);}
.btn-outline-light:hover{border-color:var(--aurora-400);color:var(--aurora-400);}
.btn:active{transform:translateY(1px);filter:brightness(.96);}
.btn[disabled],.btn.is-loading{opacity:.55;cursor:not-allowed;transform:none;box-shadow:none;}
.nav-cta{padding:11px 20px;font-size:14px;}
.hamburger{
  display:none;width:44px;height:44px;border-radius:12px;
  background:rgba(255,255,255,.06);border:1px solid var(--line-dark);
  align-items:center;justify-content:center;cursor:pointer;
}
.hamburger span{display:block;width:18px;height:2px;background:var(--text-light);border-radius:2px;position:relative;}
.hamburger span::before,.hamburger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text-light);border-radius:2px;
}
.hamburger span::before{top:-6px;}
.hamburger span::after{top:6px;}
.drawer{
  position:fixed;inset:0;z-index:90;
  background:linear-gradient(180deg,rgba(11,9,22,.98),rgba(20,16,42,.99));
  display:flex;flex-direction:column;padding:24px;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .24s ease,transform .24s ease,visibility .24s;
}
.drawer.is-open{opacity:1;visibility:visible;transform:none;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:32px;}
.drawer-close{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line-dark);
  background:rgba(255,255,255,.05);color:var(--text-light);font-size:20px;cursor:pointer;
}
.drawer-nav{display:flex;flex-direction:column;gap:6px;flex:1;}
.drawer-nav a{
  font-family:var(--font-display);font-size:24px;font-weight:700;
  color:var(--text-light);padding:14px 4px;border-bottom:1px solid var(--line-dark);
}
.drawer-nav a.is-active{color:var(--aurora-400);}
.drawer-foot{padding-top:20px;}
.drawer-foot .btn{width:100%;}

/* ===== Page head ===== */
.page-head{
  background:
    radial-gradient(circle at 18% 20%,rgba(107,84,196,.14),transparent 46%),
    radial-gradient(circle at 82% 0%,rgba(53,224,200,.10),transparent 42%),
    var(--ink-050);
  border-bottom:1px solid var(--line-light);
  padding:40px 0 36px;
}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-muted-dark);margin-bottom:18px;flex-wrap:wrap;}
.crumbs a{color:var(--text-muted-dark);}
.crumbs a:hover{color:var(--violet-500);}
.crumbs .sep{color:var(--line-light);}
.crumbs .current{color:var(--text-dark);font-weight:600;}
.head-top{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;}
.head-lead{max-width:760px;}
.head-lead h1{margin-bottom:12px;}
.head-lead p{color:var(--text-muted-dark);font-size:16px;max-width:640px;}
.head-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--radius-badge);
  border:1px solid rgba(255,194,75,.5);
  color:#8A6100;background:rgba(255,194,75,.12);
  font-size:13px;font-weight:600;margin-bottom:16px;
}
.head-stats{display:flex;gap:32px;flex-shrink:0;}
.head-stats .stat strong{
  display:block;font-family:var(--font-display);font-size:28px;
  font-weight:800;color:var(--violet-600);font-variant-numeric:tabular-nums;
}
.head-stats .stat span{font-size:13px;color:var(--text-muted-dark);}

/* ===== Sections ===== */
.section{padding:var(--space-section) 0;}
.section-tight{padding:64px 0;}
.section-head{margin-bottom:40px;max-width:720px;}
.section-head .eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--violet-500);margin-bottom:10px;
}
.section-head h2{margin-bottom:12px;}
.section-head p{color:var(--text-muted-dark);}
.bg-white{background:var(--ink-000);}
.bg-soft{background:var(--ink-050);}

/* ===== Capability cards 2x2 ===== */
.cap-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.cap-card{
  background:var(--ink-000);
  border:1px solid var(--line-light);
  border-radius:var(--radius-card);
  padding:28px;
  box-shadow:var(--shadow-card);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.cap-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-hover);border-color:rgba(53,224,200,.55);}
.cap-icon{
  width:46px;height:46px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(75,58,143,.10);
  margin-bottom:18px;
}
.cap-icon svg{width:24px;height:24px;stroke:var(--violet-600);}
.cap-card h3{margin-bottom:10px;}
.cap-card p{color:var(--text-muted-dark);font-size:15px;margin-bottom:16px;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--violet-500);
  border-bottom:2px solid transparent;padding-bottom:2px;
}
.text-link:hover{color:var(--aurora-400);border-bottom-color:var(--aurora-400);}
.text-link .arrow{transition:transform .2s ease;}
.text-link:hover .arrow{transform:translateX(3px);}

/* ===== Spec list ===== */
.spec-panel{
  background:var(--ink-000);
  border:1px solid var(--line-light);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-card);
}
.spec-row{
  display:grid;
  grid-template-columns:190px 1fr 180px;
  gap:24px;align-items:center;
  padding:22px 28px;
  border-bottom:1px solid var(--line-light);
  transition:background .18s ease;
}
.spec-row:last-child{border-bottom:0;}
.spec-row:hover{background:rgba(246,244,251,.7);}
.spec-label{
  display:inline-flex;align-items:center;justify-content:center;
  padding:6px 12px;border-radius:var(--radius-badge);
  font-size:13px;font-weight:600;
  background:rgba(75,58,143,.10);color:var(--violet-600);
  justify-self:start;white-space:nowrap;
}
.spec-label.amber{background:rgba(255,194,75,.16);color:#8A6100;}
.spec-label.mint{background:rgba(53,224,200,.14);color:#0A6B5E;}
.spec-main strong{display:block;font-size:16px;font-weight:600;margin-bottom:4px;}
.spec-main span{font-size:14px;color:var(--text-muted-dark);}
.spec-state{
  font-size:13px;color:var(--text-muted-dark);text-align:right;
  font-variant-numeric:tabular-nums;
}
.spec-state b{display:block;color:var(--text-dark);font-size:14px;font-weight:600;}

/* ===== Verify panel ===== */
.verify-wrap{
  display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;
}
.verify-media{
  position:relative;border-radius:20px;overflow:hidden;
  border:1px solid var(--line-light);
  background:linear-gradient(140deg,var(--violet-600),var(--sky-900));
  aspect-ratio:16/11;
}
.verify-media img{width:100%;height:100%;object-fit:cover;}
.verify-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(11,9,22,.42),transparent 55%);
}
.verify-copy h2{margin-bottom:14px;}
.verify-copy p{color:var(--text-muted-dark);margin-bottom:24px;}
.step-list{display:flex;flex-direction:column;gap:18px;}
.step-item{display:flex;gap:16px;align-items:flex-start;}
.step-num{
  flex-shrink:0;width:38px;height:38px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-display);font-weight:800;font-size:15px;
  color:#0A6B5E;background:rgba(53,224,200,.14);
  font-variant-numeric:tabular-nums;
}
.step-item h3{font-size:17px;margin-bottom:4px;font-family:var(--font-body);}
.step-item p{font-size:14px;color:var(--text-muted-dark);margin:0;}

/* ===== Metrics strip ===== */
.metric-strip{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  background:var(--ink-000);border:1px solid var(--line-light);
  border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card);
}
.metric{padding:26px 24px;border-right:1px solid var(--line-light);}
.metric:last-child{border-right:0;}
.metric strong{
  display:block;font-family:var(--font-display);font-size:26px;font-weight:800;
  color:var(--violet-600);font-variant-numeric:tabular-nums;margin-bottom:6px;
}
.metric span{font-size:13px;color:var(--text-muted-dark);}

/* ===== CTA strip ===== */
.cta-strip{
  position:relative;overflow:hidden;
  border-radius:var(--radius-cta);
  background:linear-gradient(120deg,var(--violet-600) 0%,var(--sky-900) 78%);
  padding:44px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
}
.cta-strip::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.22) 1px,transparent 1px);
  background-size:34px 34px;opacity:.35;pointer-events:none;
}
.cta-strip > *{position:relative;z-index:1;}
.cta-strip h2{color:var(--ink-000);margin-bottom:10px;}
.cta-strip p{color:var(--text-muted-light);font-size:15px;max-width:620px;}
.cta-actions{display:flex;gap:12px;flex-shrink:0;flex-wrap:wrap;}

/* ===== Footer ===== */
.site-footer{
  background:var(--sky-900);
  border-top:1px solid var(--line-dark);
  padding:64px 0 28px;
  color:var(--text-muted-light);
  font-size:14px;
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:40px;border-bottom:1px solid var(--line-dark);
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{color:var(--text-muted-light);font-size:14px;max-width:300px;}
.footer-col h4{
  font-family:var(--font-body);font-size:15px;font-weight:600;
  color:var(--text-light);margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a,.footer-col span{color:var(--text-muted-light);font-size:14px;}
.footer-col a:hover{color:var(--aurora-400);}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding-top:24px;font-size:13px;color:var(--text-muted-light);
}
.footer-bottom a{color:var(--aurora-400);border-bottom:1px solid transparent;}
.footer-bottom a:hover{border-bottom-color:var(--aurora-400);}

/* ===== Responsive ===== */
@media (max-width:1280px){
  .nav-search{width:160px;}
  .nav-links{margin-left:6px;}
  .nav-link{padding:8px 9px;font-size:14px;}
}
@media (max-width:1024px){
  :root{--space-section:72px;}
  .nav-links,.nav-search{display:none;}
  .hamburger{display:inline-flex;}
  .nav-utility .nav-cta{display:none;}
  .cap-grid{grid-template-columns:1fr;}
  .verify-wrap{grid-template-columns:1fr;gap:32px;}
  .metric-strip{grid-template-columns:repeat(2,minmax(0,1fr));}
  .metric:nth-child(2){border-right:0;}
  .metric:nth-child(1),.metric:nth-child(2){border-bottom:1px solid var(--line-light);}
  .spec-row{grid-template-columns:1fr;gap:10px;padding:20px 22px;}
  .spec-state{text-align:left;}
  .cta-strip{flex-direction:column;align-items:flex-start;padding:36px 28px;}
}
@media (max-width:768px){
  :root{--space-section:56px;}
  .head-stats{gap:22px;}
  .head-stats .stat strong{font-size:22px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .section-tight{padding:48px 0;}
}
@media (max-width:520px){
  .header-inner{height:56px;}
  .brand-name{font-size:16px;}
  .page-head{padding:28px 0 26px;}
  .metric-strip{grid-template-columns:1fr;}
  .metric{border-right:0;border-bottom:1px solid var(--line-light);}
  .metric:last-child{border-bottom:0;}
  .cap-card{padding:22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
}

/* roulang page: category3 */
:root{
  --sky-900:#0B0916;
  --sky-800:#14102A;
  --sky-700:#1E1838;
  --violet-600:#4B3A8F;
  --violet-500:#6B54C4;
  --aurora-400:#35E0C8;
  --amber-400:#FFC24B;
  --ink-050:#F6F4FB;
  --ink-000:#FFFFFF;
  --line-light:#E4DFF2;
  --text-dark:#1A1530;
  --text-muted-dark:#6B6585;
  --text-light:#EDEAF7;
  --text-muted-light:#A79FC4;
  --line-dark:rgba(255,255,255,.10);
  --r-pill:999px;
  --r-card:18px;
  --r-img:12px;
  --r-input:12px;
  --r-badge:6px;
  --r-cta:24px;
  --shadow-sm:0 8px 24px rgba(75,58,143,.10);
  --shadow-lg:0 14px 32px rgba(75,58,143,.16);
  --sect:96px;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--text-dark);
  background:var(--ink-050);
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .18s ease,border-color .18s ease}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-family:var(--font-serif);font-weight:700;line-height:1.28;letter-spacing:.01em}
p{margin:0}
:focus-visible{outline:2px solid var(--aurora-400);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1440px){.container{max-width:1320px}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-pill);border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  transition:background-color .18s ease,box-shadow .18s ease,transform .18s ease,color .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--aurora-400);color:#062420}
.btn-primary:hover{background:#4CEAD4;box-shadow:0 0 0 4px rgba(53,224,200,.18)}
.btn-primary:active{transform:translateY(1px);filter:brightness(.96)}
.btn-ghost{background:transparent;border-color:var(--line-light);color:var(--text-dark)}
.btn-ghost:hover{border-color:var(--violet-500);color:var(--violet-500);box-shadow:0 0 0 4px rgba(107,84,196,.10)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-block{width:100%}
.btn[disabled],.btn.is-loading{opacity:.55;cursor:not-allowed;box-shadow:none;transform:none}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-badge);
  font-size:13px;font-weight:600;letter-spacing:.02em;
  color:var(--violet-600);background:rgba(107,84,196,.10);
  border:1px solid rgba(107,84,196,.22);
}
.badge-amber{color:#8A5B00;background:rgba(255,194,75,.16);border-color:rgba(255,194,75,.42)}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(11,9,22,.94);
  border-bottom:1px solid transparent;
  transition:background-color .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.site-header.is-scrolled{background:rgba(11,9,22,.98);border-bottom-color:var(--line-dark);box-shadow:0 8px 24px rgba(11,9,22,.35)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand svg{width:26px;height:26px;flex:0 0 26px}
.brand-name{
  font-family:var(--font-serif);font-size:17px;font-weight:700;color:var(--text-light);
  letter-spacing:.02em;white-space:nowrap;
}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--text-muted-light);
  padding:6px 2px;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:transparent;transition:background-color .18s ease;
}
.nav-link:hover{color:var(--text-light)}
.nav-link.is-active{color:var(--text-light)}
.nav-link.is-active::after{background:var(--aurora-400)}
.header-actions{display:flex;align-items:center;gap:14px;flex:0 0 auto}
.nav-search{position:relative;display:flex;align-items:center}
.nav-search input{
  width:200px;height:38px;padding:0 16px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.06);border:1px solid var(--line-dark);
  color:var(--text-light);font-size:14px;
}
.nav-search input::placeholder{color:var(--text-muted-light)}
.nav-search input:focus{outline:none;border-color:var(--aurora-400);box-shadow:0 0 0 3px rgba(53,224,200,.16)}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;
  background:rgba(255,255,255,.06);border:1px solid var(--line-dark);
  cursor:pointer;padding:0;position:relative;
}
.nav-toggle span{
  position:absolute;left:11px;width:20px;height:2px;border-radius:2px;background:var(--text-light);
  transition:transform .2s ease,opacity .2s ease;
}
.nav-toggle span:nth-child(1){top:14px}
.nav-toggle span:nth-child(2){top:20px}
.nav-toggle span:nth-child(3){top:26px}

/* ---------- 移动抽屉 ---------- */
.mobile-drawer{
  position:fixed;inset:0;z-index:60;
  background:var(--sky-900);
  display:flex;flex-direction:column;
  padding:88px 24px 28px;
  opacity:0;visibility:hidden;
  transition:opacity .22s ease,visibility .22s ease;
  overflow-y:auto;
}
.mobile-drawer.is-open{opacity:1;visibility:visible}
.drawer-links{display:flex;flex-direction:column;gap:6px;flex:1}
.drawer-link{
  font-family:var(--font-serif);font-size:24px;font-weight:700;color:var(--text-muted-light);
  padding:14px 4px;border-bottom:1px solid var(--line-dark);
}
.drawer-link.is-active{color:var(--text-light)}
.drawer-link.is-active::before{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--aurora-400);margin-right:12px;vertical-align:middle}
.drawer-foot{margin-top:26px}
body.drawer-open{overflow:hidden}

/* ---------- 页头（帮助中心：窄容器居中） ---------- */
.page-hero{position:relative;background:var(--ink-050);padding:120px 0 40px;overflow:hidden}
.page-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(75,58,143,.18) 1px,transparent 1px);
  background-size:26px 26px;opacity:.55;
  animation:starDrift 60s linear infinite;
}
@keyframes starDrift{from{background-position:0 0}to{background-position:260px 130px}}
.page-hero .container{position:relative;z-index:1}
.breadcrumb{font-size:13px;color:var(--text-muted-dark);margin-bottom:26px}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--text-muted-dark);opacity:.7}
.breadcrumb a{color:var(--text-muted-dark)}
.breadcrumb a:hover{color:var(--violet-500);text-decoration:underline;text-underline-offset:3px}
.breadcrumb [aria-current="page"]{color:var(--violet-600);font-weight:600}
.page-hero-inner{max-width:720px;margin:0 auto;text-align:center}
.page-hero h1{
  font-size:clamp(30px,4.4vw,46px);font-weight:800;line-height:1.18;color:var(--text-dark);
  margin:20px 0 18px;
}
.page-hero-desc{font-size:17px;line-height:1.9;color:var(--text-muted-dark)}
.hero-meta{
  display:flex;flex-wrap:wrap;justify-content:center;gap:10px 26px;
  margin-top:26px;font-size:14px;color:var(--text-muted-dark);
}
.hero-meta span{display:inline-flex;align-items:center;gap:8px}
.hero-meta i{width:6px;height:6px;border-radius:50%;background:var(--amber-400);display:inline-block;flex:0 0 6px}

/* ---------- 板块通用 ---------- */
.section{padding:72px 0}
.section-tight{padding:32px 0 0}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:34px}
.section-head h2{font-size:clamp(24px,3vw,34px);font-weight:700;color:var(--text-dark)}
.section-head p{margin-top:10px;font-size:15px;color:var(--text-muted-dark);max-width:640px}
.section-head a.more{
  font-size:14px;font-weight:600;color:var(--violet-600);
  border-bottom:2px solid rgba(107,84,196,.28);padding-bottom:3px;
}
.section-head a.more:hover{color:var(--aurora-400);border-bottom-color:var(--aurora-400)}

/* ---------- 筛选 chips ---------- */
.chips-wrap{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 20px;border-radius:var(--r-pill);
  background:var(--ink-000);border:1px solid var(--line-light);
  font-size:14px;font-weight:600;color:var(--text-muted-dark);
  cursor:pointer;transition:all .18s ease;
}
.chip:hover{border-color:var(--violet-500);color:var(--violet-500)}
.chip .chip-num{font-size:12px;color:var(--text-muted-dark);font-variant-numeric:tabular-nums}
.chip.is-active{border-color:var(--aurora-400);color:#0B5A50;background:rgba(53,224,200,.10);box-shadow:0 0 0 3px rgba(53,224,200,.12)}
.chip.is-active .chip-num{color:#0B5A50}

/* ---------- FAQ 手风琴 ---------- */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px 22px}
.faq-item{
  background:var(--ink-000);border:1px solid var(--line-light);border-radius:14px;
  overflow:hidden;transition:box-shadow .2s ease,border-color .2s ease;
}
.faq-item:hover{border-color:rgba(107,84,196,.34)}
.faq-item.is-open{border-color:rgba(53,224,200,.6);box-shadow:var(--shadow-sm)}
.faq-item.is-hidden{display:none}
.faq-q{
  position:relative;width:100%;
  display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  padding:18px 20px 18px 22px;background:none;border:0;
  font-size:16px;font-weight:600;line-height:1.6;color:var(--text-dark);
  text-align:left;cursor:pointer;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:0 3px 3px 0;
  background:transparent;transition:background-color .2s ease;
}
.faq-item.is-open .faq-q::before{background:var(--aurora-400)}
.faq-icon{position:relative;flex:0 0 18px;width:18px;height:18px;margin-top:4px}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--violet-600);border-radius:2px;
  transform:translate(-50%,-50%);transition:transform .22s ease,background-color .22s ease;
}
.faq-icon::before{width:14px;height:2px}
.faq-icon::after{width:2px;height:14px}
.faq-item.is-open .faq-icon::before,.faq-item.is-open .faq-icon::after{background:var(--aurora-400)}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{padding:0 22px 20px;font-size:15px;line-height:1.85;color:var(--text-muted-dark)}
.faq-tag{
  display:inline-block;margin-bottom:8px;padding:3px 9px;border-radius:var(--r-badge);
  font-size:12px;font-weight:600;color:var(--violet-600);background:rgba(107,84,196,.10);
}
.faq-empty{
  grid-column:1 / -1;text-align:center;padding:48px 24px;
  background:var(--ink-000);border:1px dashed var(--line-light);border-radius:var(--r-card);
  color:var(--text-muted-dark);font-size:15px;display:none;
}
.faq-empty.is-visible{display:block}

/* ---------- 反馈表单 ---------- */
.feedback-section{background:var(--ink-000);border-top:1px solid var(--line-light);border-bottom:1px solid var(--line-light)}
.feedback-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:40px;align-items:start}
.form-card{
  background:var(--ink-050);border:1px solid var(--line-light);border-radius:var(--r-card);
  padding:32px;box-shadow:var(--shadow-sm);
}
.form-card h3{font-size:22px;color:var(--text-dark)}
.form-card>p{margin-top:10px;font-size:14px;color:var(--text-muted-dark)}
.feedback-form{margin-top:26px;display:grid;grid-template-columns:1fr 1fr;gap:20px}
.field{display:flex;flex-direction:column;gap:8px}
.field-full{grid-column:1 / -1}
.field label{font-size:14px;font-weight:600;color:var(--text-dark)}
.field input,.field select,.field textarea{
  width:100%;min-height:44px;padding:11px 14px;border-radius:var(--r-input);
  background:var(--ink-000);border:1px solid var(--line-light);color:var(--text-dark);
  font-size:15px;line-height:1.6;transition:border-color .18s ease,box-shadow .18s ease;
}
.field textarea{min-height:132px;resize:vertical}
.field select{
  appearance:none;padding-right:40px;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236B6585' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 16px center;background-size:12px;
}
.field input::placeholder,.field textarea::placeholder{color:#A29DB8}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--violet-500);box-shadow:0 0 0 3px rgba(107,84,196,.16);
}
.field-error{display:none;font-size:13px;color:#C0392B}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-color:#C0392B;box-shadow:0 0 0 3px rgba(192,57,43,.10)}
.field.has-error .field-error{display:block}
.form-actions{grid-column:1 / -1;display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-top:4px}
.form-note{
  grid-column:1 / -1;display:none;padding:14px 18px;border-radius:var(--r-input);
  font-size:14px;line-height:1.7;
}
.form-note.is-success{display:block;background:rgba(53,224,200,.12);border:1px solid rgba(53,224,200,.45);color:#0B5A50}
.form-note.is-error{display:block;background:rgba(192,57,43,.08);border:1px solid rgba(192,57,43,.38);color:#9B2E22}
.form-note.is-loading{display:block;background:rgba(107,84,196,.10);border:1px solid rgba(107,84,196,.30);color:var(--violet-600)}
.feedback-aside{display:flex;flex-direction:column;gap:22px}
.feedback-aside figure{margin:0;border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--line-light)}
.feedback-aside img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img)}
.aside-list{background:var(--ink-050);border:1px solid var(--line-light);border-radius:var(--r-card);padding:24px}
.aside-list h3{font-size:19px;color:var(--text-dark);margin-bottom:14px}
.aside-list li{display:flex;gap:12px;padding:12px 0;border-bottom:1px solid var(--line-light);font-size:14px;color:var(--text-muted-dark);line-height:1.75}
.aside-list li:last-child{border-bottom:0;padding-bottom:0}
.aside-list b{flex:0 0 auto;color:var(--violet-600);font-family:var(--font-serif)}
.aside-list strong{color:var(--text-dark)}

/* ---------- 回首页文字链接带 ---------- */
.back-band{padding:56px 0 88px}
.back-band-inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:18px;
  padding:26px 28px;border:1px solid var(--line-light);border-radius:var(--r-card);
  background:var(--ink-000);text-align:center;
}
.back-band-inner p{font-size:15px;color:var(--text-muted-dark)}
.back-band-inner a{
  font-weight:600;color:var(--violet-600);
  border-bottom:2px solid rgba(107,84,196,.3);padding-bottom:2px;
}
.back-band-inner a:hover{color:var(--aurora-400);border-bottom-color:var(--aurora-400)}

/* ---------- 页脚 ---------- */
.site-footer{position:relative;background:var(--sky-900);border-top:1px solid var(--line-dark);color:var(--text-muted-light);padding:64px 0 32px;overflow:hidden}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.10) 1px,transparent 1px);
  background-size:34px 34px;opacity:.35;
}
.site-footer .container{position:relative;z-index:1}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.85;color:var(--text-muted-light);max-width:320px}
.footer-col h4{font-family:var(--font-sans);font-size:15px;font-weight:600;color:var(--text-light);margin-bottom:16px}
.footer-col li{margin-bottom:10px;font-size:14px}
.footer-col a{color:var(--text-muted-light)}
.footer-col a:hover{color:var(--aurora-400);text-decoration:underline;text-underline-offset:3px}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line-dark);
  display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-muted-light);
}
.footer-bottom a{color:var(--text-light);border-bottom:1px solid rgba(255,255,255,.28);padding-bottom:1px}
.footer-bottom a:hover{color:var(--aurora-400);border-bottom-color:var(--aurora-400)}

/* ---------- 断点 ---------- */
@media (max-width:1279px){
  .nav-search{display:none}
}
@media (max-width:1023px){
  :root{--sect:72px}
  .nav-links{display:none}
  .nav-toggle{display:block}
  .header-actions .btn{display:none}
  .page-hero{padding:104px 0 32px}
  .faq-grid{grid-template-columns:1fr}
  .feedback-grid{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .section{padding:64px 0}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .site-header .brand-name{font-size:16px}
  .page-hero h1{margin:16px 0 14px}
  .page-hero-desc{font-size:16px}
  .feedback-form{grid-template-columns:1fr}
  .form-card{padding:24px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .faq-q{font-size:15px;padding:16px 16px 16px 20px}
  .faq-a p{padding:0 18px 18px}
  .section{padding:56px 0}
  .back-band{padding:44px 0 64px}
}
@media (max-width:480px){
  .brand-name{font-size:15px}
  .hero-meta{flex-direction:column;gap:10px;align-items:center}
  .btn{padding:12px 22px}
  .chip{padding:9px 16px;font-size:13px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}