/* roulang page: index */
/* ============================================================
   设计变量
   ============================================================ */
:root{
  --bg-deep:#05070F;
  --bg-base:#080B1A;
  --bg-raise:#0D1226;
  --bg-inset:#0A0E20;
  --brand-primary:#4BE1D0;
  --brand-secondary:#7C6BFF;
  --accent-star:#FFC978;
  --signal:#35E39A;
  --text-1:#EAF0FF;
  --text-2:rgba(234,240,255,.68);
  --text-3:rgba(234,240,255,.42);
  --stroke:rgba(255,255,255,.10);
  --stroke-strong:rgba(75,225,208,.35);
  --stroke-soft:rgba(255,255,255,.06);
  --glass:rgba(18,24,48,.55);
  --shadow-1:0 8px 24px rgba(3,6,18,.45);
  --shadow-2:0 18px 48px rgba(3,6,18,.60);
  --shadow-glow:0 0 0 1px rgba(75,225,208,.35), 0 10px 30px rgba(75,225,208,.16);
  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --r-pill:999px;
  --sp-1:4px; --sp-2:8px; --sp-3:12px; --sp-4:16px; --sp-5:24px;
  --sp-6:32px; --sp-7:48px; --sp-8:72px; --sp-9:96px;
  --font-cn:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
}

/* ============================================================
   Reset / Base
   ============================================================ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-deep);
  color:var(--text-1);
  font-family:var(--font-cn);
  font-size:16px;
  font-weight:400;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none;background-color:transparent}
a:hover,a:focus{color:inherit}
button{font-family:inherit;font-size:inherit;line-height:inherit;margin:0;cursor:pointer}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0}
ul,ol{list-style:none}
h1,h2,h3,h4{font-weight:600;letter-spacing:.01em;line-height:1.35}
input,textarea,select{font-family:inherit;font-size:inherit}
::selection{background:rgba(75,225,208,.28);color:var(--text-1)}
:focus-visible{outline:2px solid var(--brand-primary);outline-offset:2px}

/* ============================================================
   容器与板块
   ============================================================ */
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:32px;
  padding-right:32px;
}
.section{padding:96px 0;position:relative}
.section--tight{padding:72px 0}
.section--inset{background:var(--bg-base);border-top:1px solid var(--stroke-soft);border-bottom:1px solid var(--stroke-soft)}
.section-head{max-width:760px;margin-bottom:48px}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.06em;color:var(--brand-primary);
  text-transform:uppercase;
  padding:6px 14px;border-radius:var(--r-pill);
  border:1px solid var(--stroke-strong);
  background:rgba(75,225,208,.07);
  margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand-primary);box-shadow:0 0 8px var(--brand-primary)}
h2.section-title{font-size:clamp(22px,2.6vw,32px);font-weight:600;line-height:1.35}
.section-sub{margin-top:14px;color:var(--text-2);font-size:16px;line-height:1.9}
.text-muted{color:var(--text-3)}
.divider-scale{
  height:1px;width:100%;
  background:linear-gradient(90deg,transparent,var(--stroke) 12%,var(--stroke-strong) 50%,var(--stroke) 88%,transparent);
}

/* Foundation 栅格覆盖 */
.grid-margin-x{margin-left:-12px;margin-right:-12px}
.grid-margin-x>.cell{padding-left:12px;padding-right:12px}
.grid-margin-y{margin-top:-12px;margin-bottom:-12px}
.grid-margin-y>.cell{padding-top:12px;padding-bottom:12px}

/* ============================================================
   按钮
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 26px;
  border-radius:var(--r-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;
  transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease,background-color .16s ease,color .16s ease,filter .16s ease;
  white-space:nowrap;
  cursor:pointer;
  background:transparent;color:var(--text-1);
}
.btn--primary{
  background:linear-gradient(100deg,var(--brand-primary),var(--brand-secondary));
  color:#04101B;
  box-shadow:0 10px 26px rgba(75,225,208,.22);
}
.btn--primary:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:var(--shadow-glow);color:#04101B}
.btn--primary:active{transform:translateY(1px)}
.btn--ghost{
  border-color:var(--stroke-strong);
  color:var(--text-1);
  background:rgba(75,225,208,.04);
}
.btn--ghost:hover{background:rgba(75,225,208,.12);transform:translateY(-2px);color:var(--text-1)}
.btn--ghost:active{transform:translateY(1px)}
.btn--sm{min-height:42px;padding:0 20px;font-size:14px}
.btn--block{width:100%}
.link-cta{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand-primary);font-size:14px;font-weight:500;
  transition:color .16s ease;
}
.link-cta svg{width:16px;height:16px;transition:transform .18s ease}
.link-cta:hover{color:#7bf0e3}
.link-cta:hover svg{transform:translateX(4px)}

/* ============================================================
   徽章 / 标签
   ============================================================ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:8px;
  font-size:12px;font-weight:500;line-height:1.6;letter-spacing:.02em;
  border:1px solid transparent;
}
.badge--purple{color:#BDB4FF;background:rgba(124,107,255,.16);border-color:rgba(124,107,255,.30)}
.badge--teal{color:#8AF2E5;background:rgba(75,225,208,.14);border-color:var(--stroke-strong)}
.badge--gold{color:#FFD79B;background:rgba(255,201,120,.14);border-color:rgba(255,201,120,.28)}
.badge--signal{color:#8CF0C0;background:rgba(53,227,154,.14);border-color:rgba(53,227,154,.28)}
.tag-list{display:flex;flex-wrap:wrap;gap:8px}

/* ============================================================
   卡片
   ============================================================ */
.card{
  position:relative;
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border:1px solid var(--stroke);
  border-radius:var(--r-md);
  box-shadow:var(--shadow-1);
  padding:26px;
  height:100%;
  transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease;
}
@supports not ((backdrop-filter:blur(2px)) or (-webkit-backdrop-filter:blur(2px))){
  .card{background:var(--bg-raise)}
}
.card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.22),transparent);
  border-radius:var(--r-md) var(--r-md) 0 0;
  pointer-events:none;
}
.card:hover{transform:translateY(-3px);border-color:var(--stroke-strong);box-shadow:var(--shadow-2)}
.card--flat:hover{transform:none;box-shadow:var(--shadow-1)}
.card__icon{
  width:46px;height:46px;border-radius:13px;
  display:grid;place-items:center;
  color:var(--brand-primary);
  background:radial-gradient(circle at 30% 25%,rgba(75,225,208,.24),rgba(75,225,208,.06));
  border:1px solid var(--stroke-strong);
  margin-bottom:18px;
}
.card__icon svg{width:24px;height:24px}
.card h3{font-size:18px;font-weight:600;margin-bottom:10px}
.card p{color:var(--text-2);font-size:15px;line-height:1.85}
.card__foot{margin-top:18px}

/* ============================================================
   顶部导航
   ============================================================ */
.site-header{
  position:sticky;top:0;z-index:80;
  padding:20px 0 0;
  transition:padding .22s ease;
}
.site-header.is-stuck{padding-top:10px}
.nav-card{
  position:relative;
  display:flex;align-items:center;gap:20px;
  padding:11px 14px 11px 20px;
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border:1px solid var(--stroke);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-1);
  transition:padding .22s ease,background-color .22s ease,box-shadow .22s ease,border-color .22s ease;
}
@supports not ((backdrop-filter:blur(2px)) or (-webkit-backdrop-filter:blur(2px))){
  .nav-card{background:rgba(13,18,38,.96)}
}
.site-header.is-stuck .nav-card{
  padding-top:8px;padding-bottom:8px;
  background:rgba(8,11,26,.94);
  box-shadow:var(--shadow-2);
  border-color:var(--stroke-strong);
}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand__mark{
  width:42px;height:42px;flex:0 0 42px;border-radius:13px;
  display:grid;place-items:center;
  color:var(--brand-primary);
  background:linear-gradient(140deg,rgba(75,225,208,.20),rgba(124,107,255,.20));
  border:1px solid var(--stroke-strong);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.16);
}
.brand__mark svg{width:24px;height:24px}
.brand__text{display:flex;flex-direction:column;line-height:1.3}
.brand__text strong{font-size:15px;font-weight:600;letter-spacing:.01em;white-space:nowrap}
.brand__text em{font-style:normal;font-size:12px;color:var(--text-3);white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:8px;margin-left:auto}
.nav-link{
  display:inline-flex;align-items:center;gap:8px;
  min-height:44px;padding:0 16px;
  border-radius:var(--r-sm);
  font-size:14px;color:var(--text-2);
  border:1px solid transparent;
  background:rgba(255,255,255,.03);
  transition:color .16s ease,background-color .16s ease,border-color .16s ease,transform .16s ease;
  white-space:nowrap;
}
.nav-link:hover{color:var(--text-1);border-color:var(--stroke);background:rgba(75,225,208,.08);transform:translateY(-1px)}
.nav-link.is-active{
  color:var(--brand-primary);
  border-color:var(--stroke-strong);
  background:rgba(75,225,208,.10);
}
.nav-link__dot{width:6px;height:6px;border-radius:50%;background:currentColor;opacity:.55}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  align-items:center;justify-content:center;
  border:1px solid var(--stroke);background:rgba(255,255,255,.04);
  color:var(--text-1);
}
.nav-toggle svg{width:20px;height:20px}

/* ============================================================
   Hero
   ============================================================ */
.hero{position:relative;padding:64px 0 80px;overflow:hidden}
.hero__bg{
  position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(900px 520px at 80% 6%,rgba(124,107,255,.20),transparent 66%),
    radial-gradient(720px 460px at 8% 86%,rgba(75,225,208,.13),transparent 72%),
    var(--bg-deep);
}
.hero__stars{
  position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:radial-gradient(rgba(234,240,255,.28) 1px,transparent 1px);
  background-size:58px 58px;
  -webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.9),transparent 74%);
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.9),transparent 74%);
}
.hero .container{position:relative;z-index:2}
.hero__title{
  font-size:clamp(28px,4vw,44px);
  font-weight:600;
  line-height:1.28;
  letter-spacing:.01em;
  margin-bottom:20px;
}
.hero__title span{
  background:linear-gradient(96deg,var(--brand-primary),#9E93FF 78%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}
.hero__sub{color:var(--text-2);font-size:17px;line-height:1.9;max-width:560px}
.hero__cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero__visual{position:relative;margin-top:8px}
.hero__media{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--stroke);
  box-shadow:var(--shadow-2);
  aspect-ratio:16/11;
}
.hero__media img{width:100%;height:100%;object-fit:cover}
.hero__media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(160deg,rgba(5,7,15,.20) 0%,rgba(5,7,15,.78) 100%);
}
.hero__stat{
  position:absolute;left:22px;bottom:22px;right:22px;
  display:flex;flex-wrap:wrap;gap:10px 22px;
  padding:14px 18px;border-radius:var(--r-sm);
  background:rgba(9,12,28,.72);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border:1px solid var(--stroke);
}
.hero__stat div{display:flex;flex-direction:column;line-height:1.4}
.hero__stat b{font-size:20px;font-variant-numeric:tabular-nums;color:var(--brand-primary);font-weight:600}
.hero__stat span{font-size:12px;color:var(--text-3)}

/* 步骤刻度条 */
.steps-bar{
  margin-top:52px;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:0;
  border-top:1px solid var(--stroke);
  padding-top:0;
}
.step{
  position:relative;
  padding:24px 24px 0 0;
}
.step::before{
  content:"";position:absolute;top:-1px;left:0;
  width:56px;height:2px;background:var(--brand-primary);
  box-shadow:0 0 12px rgba(75,225,208,.6);
}
.step__no{
  font-size:13px;color:var(--accent-star);
  font-variant-numeric:tabular-nums;letter-spacing:.08em;
  display:block;margin-bottom:8px;
}
.step__title{font-size:16px;font-weight:500;margin-bottom:6px}
.step__desc{font-size:14px;color:var(--text-3);line-height:1.75}

/* ============================================================
   状态条
   ============================================================ */
.status-strip{
  display:grid;grid-template-columns:repeat(4,1fr);
  border:1px solid var(--stroke);
  border-radius:var(--r-md);
  background:var(--bg-inset);
  overflow:hidden;
}
.status-item{
  padding:22px 24px;
  position:relative;
}
.status-item+.status-item{border-left:1px solid var(--stroke-soft)}
.status-item b{
  display:block;font-size:30px;font-weight:600;
  font-variant-numeric:tabular-nums;
  color:var(--brand-primary);line-height:1.2;
}
.status-item span{display:block;font-size:13px;color:var(--text-3);margin-top:6px}
.status-item i{
  display:inline-flex;align-items:center;gap:6px;
  font-style:normal;font-size:12px;color:var(--signal);margin-top:8px;
}
.status-item i::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--signal);box-shadow:0 0 8px var(--signal)}

/* ============================================================
   价值主张
   ============================================================ */
.value-hero{
  padding:34px;
  border-radius:var(--r-lg);
  background:linear-gradient(150deg,rgba(75,225,208,.10),rgba(124,107,255,.12) 62%,rgba(18,24,48,.55));
  border:1px solid var(--stroke-strong);
  box-shadow:var(--shadow-2);
  height:100%;
  display:flex;flex-direction:column;justify-content:space-between;
}
.value-hero h3{font-size:22px;margin-bottom:14px;line-height:1.4}
.value-hero p{color:var(--text-2);font-size:15px}
.value-hero__list{margin-top:26px;display:flex;flex-direction:column;gap:12px}
.value-hero__list li{
  display:flex;align-items:flex-start;gap:10px;
  font-size:14px;color:var(--text-2);
}
.value-hero__list svg{width:18px;height:18px;flex:0 0 18px;color:var(--brand-primary);margin-top:4px}
.value-mini{display:flex;flex-direction:column;gap:20px;height:100%}

/* ============================================================
   功能卡
   ============================================================ */
.feature-card{display:flex;flex-direction:column;height:100%}
.feature-card h3{font-size:18px;margin-bottom:10px}
.feature-card .card__foot{margin-top:auto;padding-top:18px}

/* ============================================================
   使用场景
   ============================================================ */
.scene{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
  padding:52px 0;
  border-bottom:1px solid var(--stroke-soft);
}
.scene:last-child{border-bottom:0}
.scene--reverse .scene__media{order:2}
.scene__media{
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--stroke);
  box-shadow:var(--shadow-1);
  aspect-ratio:4/3;
  position:relative;
}
.scene__media img{width:100%;height:100%;object-fit:cover}
.scene__media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,7,15,0) 40%,rgba(5,7,15,.55));
}
.scene__no{
  font-size:34px;font-weight:600;font-variant-numeric:tabular-nums;
  color:transparent;-webkit-text-stroke:1px rgba(75,225,208,.65);
  line-height:1;margin-bottom:16px;letter-spacing:.04em;
}
.scene h3{font-size:22px;margin:14px 0 12px}
.scene p{color:var(--text-2);font-size:15px;max-width:520px}

/* ============================================================
   案例
   ============================================================ */
.case-main{
  padding:34px;border-radius:var(--r-lg);
  background:linear-gradient(160deg,rgba(124,107,255,.16),rgba(18,24,48,.62));
  border:1px solid rgba(124,107,255,.30);
  box-shadow:var(--shadow-2);
  height:100%;
  display:flex;flex-direction:column;justify-content:space-between;
}
.case-main b{
  display:block;font-size:56px;font-weight:600;line-height:1.05;
  font-variant-numeric:tabular-nums;
  background:linear-gradient(96deg,var(--brand-primary),#A79CFF);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}
.case-main h3{font-size:20px;margin:16px 0 10px}
.case-main p{color:var(--text-2);font-size:15px}
.case-mini-list{display:flex;flex-direction:column;gap:18px;height:100%}
.case-mini{flex:1;display:flex;flex-direction:column;justify-content:center;padding:22px}
.case-mini b{
  font-size:30px;font-weight:600;font-variant-numeric:tabular-nums;
  color:var(--accent-star);line-height:1.15;
}
.case-mini span{display:block;font-size:14px;color:var(--text-2);margin-top:8px}
.case-mini em{display:block;font-style:normal;font-size:12px;color:var(--text-3);margin-top:10px}

/* ============================================================
   价格
   ============================================================ */
.price-card{
  display:flex;flex-direction:column;
  height:100%;
  padding:30px 26px;
}
.price-card--main{
  border-color:var(--stroke-strong);
  box-shadow:var(--shadow-glow);
  background:linear-gradient(170deg,rgba(75,225,208,.09),rgba(18,24,48,.62) 60%);
  transform:translateY(-10px);
}
.price-card--main:hover{transform:translateY(-13px)}
.price-card__badge{
  position:absolute;top:-13px;left:26px;
  padding:4px 14px;border-radius:var(--r-pill);
  font-size:12px;font-weight:600;color:#04101B;
  background:linear-gradient(96deg,var(--brand-primary),var(--brand-secondary));
}
.price-card h3{font-size:17px;color:var(--text-2);font-weight:500;letter-spacing:.02em}
.price-card__num{
  display:flex;align-items:baseline;gap:6px;margin:18px 0 22px;
  font-variant-numeric:tabular-nums;
}
.price-card__num b{font-size:44px;font-weight:600;line-height:1;letter-spacing:.01em}
.price-card__num span{font-size:14px;color:var(--text-3)}
.price-card__list{display:flex;flex-direction:column;gap:12px;margin-bottom:26px}
.price-card__list li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--text-2)}
.price-card__list svg{width:18px;height:18px;flex:0 0 18px;margin-top:4px}
.price-card__list .ok{color:var(--brand-primary)}
.price-card__foot{margin-top:auto}

/* ============================================================
   CMS 最新信息
   ============================================================ */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.news-card{
  display:flex;flex-direction:column;
  height:100%;
  position:relative;
  padding:24px;
  border-radius:var(--r-md);
  background:var(--glass);
  border:1px solid var(--stroke);
  box-shadow:var(--shadow-1);
  transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease;
}
@supports not ((backdrop-filter:blur(2px)) or (-webkit-backdrop-filter:blur(2px))){
  .news-card{background:var(--bg-raise)}
}
.news-card::after{
  content:"";position:absolute;left:0;top:22px;bottom:22px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand-primary);
  opacity:0;transition:opacity .16s ease;
}
.news-card:hover{transform:translateY(-3px);border-color:var(--stroke-strong);box-shadow:var(--shadow-2)}
.news-card:hover::after{opacity:1}
.news-card__top{margin-bottom:14px}
.news-card h3{
  font-size:17px;font-weight:600;line-height:1.55;
  margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card p{
  color:var(--text-2);font-size:14px;line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  margin-bottom:18px;
}
.news-card__meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--stroke-soft);
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
.news-card__more{color:var(--brand-primary)}
.empty-state{
  text-align:center;
  padding:48px 24px;
  border-radius:var(--r-md);
  border:1px dashed var(--stroke);
  background:var(--bg-inset);
}
.empty-state__icon{
  width:54px;height:54px;margin:0 auto 18px;border-radius:15px;
  display:grid;place-items:center;color:var(--brand-primary);
  background:rgba(75,225,208,.08);border:1px solid var(--stroke-strong);
}
.empty-state__icon svg{width:26px;height:26px}
.empty-state p{color:var(--text-2);font-size:15px;margin-bottom:22px}

/* ============================================================
   FAQ
   ============================================================ */
.faq-list{display:flex;flex-direction:column;gap:14px}
.faq-item{
  border:1px solid var(--stroke);
  border-radius:var(--r-md);
  background:var(--glass);
  overflow:hidden;
  transition:border-color .18s ease,box-shadow .18s ease;
}
@supports not ((backdrop-filter:blur(2px)) or (-webkit-backdrop-filter:blur(2px))){
  .faq-item{background:var(--bg-raise)}
}
.faq-item.is-open{border-color:var(--stroke-strong);box-shadow:var(--shadow-1)}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;
  background:transparent;border:0;
  color:var(--text-1);
  font-size:16px;font-weight:500;text-align:left;
  position:relative;
  min-height:44px;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand-primary);
  opacity:0;transition:opacity .2s ease;
}
.faq-item.is-open .faq-q::before{opacity:1}
.faq-q__icon{
  flex:0 0 26px;width:26px;height:26px;
  display:grid;place-items:center;border-radius:8px;
  border:1px solid var(--stroke);color:var(--brand-primary);
  transition:transform .2s ease,background-color .2s ease;
}
.faq-q__icon svg{width:14px;height:14px}
.faq-item.is-open .faq-q__icon{transform:rotate(45deg);background:rgba(75,225,208,.14)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .24s ease;
}
.faq-a__inner{
  padding:0 24px 22px 24px;
  color:var(--text-2);font-size:15px;line-height:1.9;
}

/* ============================================================
   底部 CTA
   ============================================================ */
.cta-band{
  position:relative;
  border-radius:var(--r-lg);
  padding:56px 48px;
  overflow:hidden;
  border:1px solid var(--stroke-strong);
  background:linear-gradient(120deg,rgba(75,225,208,.13),rgba(124,107,255,.16) 58%,rgba(13,18,38,.85));
  box-shadow:var(--shadow-2);
  display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:radial-gradient(rgba(234,240,255,.30) 1px,transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:linear-gradient(110deg,rgba(0,0,0,.85),transparent 70%);
  mask-image:linear-gradient(110deg,rgba(0,0,0,.85),transparent 70%);
}
.cta-band__text{position:relative;z-index:2;max-width:620px}
.cta-band__text h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:12px}
.cta-band__text p{color:var(--text-2);font-size:15px}
.cta-band__actions{position:relative;z-index:2;display:flex;align-items:center;gap:18px;flex-wrap:wrap}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  background:var(--bg-base);
  border-top:1px solid var(--stroke-soft);
  padding:72px 0 0;
  margin-top:96px;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:48px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.footer-brand .brand__mark{width:38px;height:38px;flex:0 0 38px;border-radius:12px}
.footer-brand strong{font-size:16px;font-weight:600}
.footer-col p{color:var(--text-3);font-size:14px;line-height:1.9;max-width:320px}
.footer-col h4{
  font-size:14px;font-weight:500;color:var(--text-2);
  letter-spacing:.04em;margin-bottom:18px;
}
.footer-links{display:flex;flex-direction:column;gap:12px}
.footer-links a{font-size:14px;color:var(--text-3);transition:color .16s ease,padding-left .16s ease}
.footer-links a:hover{color:var(--brand-primary);padding-left:4px}
.footer-const{
  height:1px;margin-top:56px;
  background:linear-gradient(90deg,transparent,rgba(75,225,208,.35) 20%,rgba(124,107,255,.32) 55%,transparent);
}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:24px 0 30px;
  font-size:13px;color:var(--text-3);
}
.footer-bottom span{display:inline-flex;align-items:center;gap:8px}
.footer-bottom i{font-style:normal;color:var(--signal)}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1199px){
  .container{max-width:100%}
}
@media (max-width:1023px){
  .container{padding-left:24px;padding-right:24px}
  .section{padding:64px 0}
  .section--tight{padding:56px 0}
  .section-head{margin-bottom:36px}

  .site-header{padding-top:14px}
  .nav-toggle{display:grid}
  .nav-links{
    position:absolute;top:calc(100% + 10px);left:0;right:0;
    display:none;
    flex-direction:column;align-items:stretch;gap:8px;
    margin-left:0;
    padding:14px;
    background:rgba(8,11,26,.97);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    border:1px solid var(--stroke);
    border-radius:var(--r-lg);
    box-shadow:var(--shadow-2);
  }
  .nav-open .nav-links{display:flex}
  .nav-link{min-height:48px;font-size:15px;justify-content:flex-start}
  .nav-actions .btn--sm{display:none}

  .hero{padding:44px 0 60px}
  .hero__sub{max-width:100%}
  .hero__visual{margin-top:36px}
  .steps-bar{grid-template-columns:1fr;gap:0;margin-top:40px}
  .step{padding:22px 0 0 0}
  .status-strip{grid-template-columns:repeat(2,1fr)}
  .status-item+.status-item{border-left:0}
  .status-item{border-top:1px solid var(--stroke-soft)}
  .status-item:nth-child(odd){border-right:1px solid var(--stroke-soft)}
  .status-item:nth-child(-n+2){border-top:0}

  .scene{grid-template-columns:1fr;gap:28px;padding:40px 0}
  .scene--reverse .scene__media{order:0}
  .scene p{max-width:100%}

  .price-card--main{transform:none}
  .price-card--main:hover{transform:translateY(-3px)}

  .news-head{flex-direction:column;align-items:flex-start;gap:14px}

  .cta-band{padding:40px 28px;flex-direction:column;align-items:flex-start}

  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .site-footer{padding-top:56px;margin-top:64px}
}
@media (max-width:639px){
  body{font-size:15px}
  .container{padding-left:20px;padding-right:20px}
  .section{padding:56px 0}
  .card{padding:22px}
  .status-item{padding:18px 18px}
  .status-item b{font-size:26px}
  .hero__title{font-size:clamp(26px,7vw,32px)}
  .hero__sub{font-size:16px}
  .hero__cta .btn{width:100%}
  .hero__cta{flex-direction:column;align-items:stretch}
  .steps-bar{margin-top:34px}
  .value-hero{padding:26px}
  .case-main,.cta-band{padding:28px 22px}
  .case-main b{font-size:44px}
  .faq-q{padding:18px;font-size:15px}
  .faq-a__inner{padding:0 18px 18px 18px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:480px){
  .brand__text em{display:none}
  .brand__text strong{font-size:14px}
  .price-card__num b{font-size:38px}
}

/* roulang page: article */
:root{
  --bg-deep:#05070F;
  --bg-base:#080B1A;
  --bg-raise:#0D1226;
  --bg-inset:#0A0E20;
  --brand-primary:#4BE1D0;
  --brand-secondary:#7C6BFF;
  --accent-star:#FFC978;
  --signal:#35E39A;
  --text-1:#EAF0FF;
  --text-2:rgba(234,240,255,.68);
  --text-3:rgba(234,240,255,.42);
  --stroke:rgba(255,255,255,.10);
  --stroke-strong:rgba(75,225,208,.35);
  --stroke-soft:rgba(255,255,255,.06);
  --glass:rgba(18,24,48,.55);
  --shadow-1:0 8px 24px rgba(3,6,18,.45);
  --shadow-2:0 18px 48px rgba(3,6,18,.60);
  --shadow-glow:0 0 0 1px rgba(75,225,208,.35),0 10px 30px rgba(75,225,208,.16);
  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --r-pill:999px;
  --sp-1:4px;--sp-2:8px;--sp-3:12px;--sp-4:16px;--sp-5:24px;--sp-6:32px;--sp-7:48px;--sp-8:72px;--sp-9:96px;
  --font-cn:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--text-1);
  background:var(--bg-base);
  background-image:
    radial-gradient(900px 520px at 82% -8%,rgba(124,107,255,.16),transparent 62%),
    radial-gradient(760px 480px at 6% 4%,rgba(75,225,208,.10),transparent 60%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--brand-primary);outline-offset:2px;border-radius:6px}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;letter-spacing:.01em;line-height:1.32;font-weight:600;color:var(--text-1)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:88px 0}
.section--tight{padding:64px 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand-primary);font-weight:500;
}
.eyebrow::before{content:"";width:22px;height:1px;background:linear-gradient(90deg,var(--brand-primary),transparent)}
.section-head{margin-bottom:40px;max-width:760px}
.section-head h2{font-size:clamp(22px,2.6vw,32px);margin-top:12px}
.section-head p{margin-top:14px;color:var(--text-2);font-size:15px}

/* ---------- 顶部导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;padding:16px 0;transition:padding .22s ease,background .22s ease}
.site-header.is-stuck{padding:8px 0;background:rgba(5,7,15,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--stroke-soft)}
.nav-card{
  display:flex;align-items:center;gap:20px;
  padding:12px 16px;
  background:var(--glass);
  border:1px solid var(--stroke);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-1);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  position:relative;
}
.nav-card::before{
  content:"";position:absolute;inset:0 0 auto 0;height:1px;border-radius:var(--r-lg) var(--r-lg) 0 0;
  background:linear-gradient(90deg,transparent,rgba(75,225,208,.45),transparent);
}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand__mark{
  width:42px;height:42px;flex:0 0 42px;display:grid;place-items:center;
  border-radius:14px;color:var(--brand-primary);
  background:linear-gradient(150deg,rgba(75,225,208,.18),rgba(124,107,255,.20));
  border:1px solid var(--stroke-strong);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.14);
}
.brand__mark svg{width:24px;height:24px}
.brand__text{display:flex;flex-direction:column;line-height:1.2}
.brand__text strong{font-size:16px;font-weight:600;letter-spacing:.02em}
.brand__text em{font-style:normal;font-size:12px;color:var(--text-3);margin-top:3px}
.nav-links{display:flex;align-items:center;gap:8px;margin-left:auto;flex-wrap:wrap}
.nav-link{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 14px;min-height:44px;
  font-size:14px;color:var(--text-2);
  border:1px solid var(--stroke-soft);
  border-radius:var(--r-sm);
  background:rgba(255,255,255,.02);
  transition:color .16s ease,border-color .16s ease,background .16s ease,transform .16s ease;
}
.nav-link__dot{width:6px;height:6px;border-radius:50%;background:var(--text-3);transition:background .16s ease,box-shadow .16s ease}
.nav-link:hover{color:var(--text-1);border-color:var(--stroke-strong);background:rgba(75,225,208,.07);transform:translateY(-2px)}
.nav-link:hover .nav-link__dot{background:var(--brand-primary);box-shadow:0 0 8px rgba(75,225,208,.7)}
.nav-link.is-active{color:var(--text-1);border-color:var(--stroke-strong);background:rgba(75,225,208,.10)}
.nav-link.is-active .nav-link__dot{background:var(--brand-primary);box-shadow:0 0 8px rgba(75,225,208,.7)}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-sm);
  background:rgba(255,255,255,.03);border:1px solid var(--stroke);color:var(--text-1);
  align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle svg{width:22px;height:22px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border-radius:var(--r-pill);border:1px solid transparent;cursor:pointer;
  transition:transform .16s ease,box-shadow .16s ease,background .16s ease,border-color .16s ease,filter .16s ease;
}
.btn--sm{min-height:38px;padding:0 18px;font-size:14px}
.btn--primary{
  color:#04120F;
  background:linear-gradient(120deg,var(--brand-primary),var(--brand-secondary));
  box-shadow:var(--shadow-glow);
}
.btn--primary:hover{transform:translateY(-2px);filter:brightness(1.06);box-shadow:0 0 0 1px rgba(75,225,208,.55),0 14px 34px rgba(75,225,208,.24)}
.btn--primary:active{transform:translateY(1px)}
.btn--ghost{
  color:var(--text-1);
  background:transparent;
  border-color:var(--stroke-strong);
}
.btn--ghost:hover{background:rgba(75,225,208,.10);transform:translateY(-2px)}
.link-cta{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-primary);min-height:44px}
.link-cta i{transition:transform .16s ease}
.link-cta:hover i{transform:translateX(4px)}

/* ---------- 阅读进度 ---------- */
.progress-bar{position:fixed;top:0;left:0;height:2px;width:0;z-index:80;background:linear-gradient(90deg,var(--brand-primary),var(--brand-secondary));box-shadow:0 0 12px rgba(75,225,208,.6)}

/* ---------- 面包屑 ---------- */
.crumbs{padding:26px 0 0}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13.5px;color:var(--text-3)}
.crumbs li{display:inline-flex;align-items:center;gap:10px}
.crumbs li+li::before{content:"›";color:var(--text-3);opacity:.8}
.crumbs a{color:var(--text-3)}
.crumbs a:hover{color:var(--brand-primary)}
.crumbs .is-current{color:var(--text-2)}

/* ---------- 文章头部 ---------- */
.article-hero{padding:30px 0 40px}
.article-hero__inner{max-width:860px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 12px;border-radius:8px;font-size:12.5px;font-weight:600;
  background:rgba(124,107,255,.16);color:#B7ACFF;border:1px solid rgba(124,107,255,.32);
}
.badge--star{background:rgba(255,201,120,.14);color:var(--accent-star);border-color:rgba(255,201,120,.30)}
.badge--signal{background:rgba(53,227,154,.14);color:var(--signal);border-color:rgba(53,227,154,.30)}
.article-title{font-size:clamp(28px,4vw,44px);font-weight:700;margin:20px 0 0;line-height:1.28}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;
  margin-top:22px;font-size:13.5px;color:var(--text-3);
}
.article-meta span{display:inline-flex;align-items:center;gap:7px}
.article-meta i{color:var(--brand-primary);opacity:.85}
.meta-divider{width:1px;height:14px;background:var(--stroke);display:inline-block}

/* ---------- 封面 ---------- */
.cover-figure{margin:0 0 8px}
.cover-figure img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-md);border:1px solid var(--stroke);
  box-shadow:var(--shadow-2);
}
.cover-figure figcaption{margin-top:12px;font-size:13px;color:var(--text-3)}

/* ---------- 正文 ---------- */
.article-shell{padding:52px 0 24px}
.article-body{max-width:752px;margin:0 auto;font-size:16px;line-height:1.9;color:var(--text-1)}
.article-body>*+*{margin-top:18px}
.article-body p{color:var(--text-2)}
.article-body h2{
  position:relative;font-size:clamp(20px,2.3vw,26px);font-weight:600;
  margin-top:48px;padding-left:16px;color:var(--text-1);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:4px;
  background:linear-gradient(180deg,var(--brand-primary),var(--brand-secondary));
  box-shadow:0 0 14px rgba(75,225,208,.45);
}
.article-body h3{font-size:19px;font-weight:600;margin-top:34px}
.article-body h4{font-size:16.5px;font-weight:600;color:var(--text-1);margin-top:26px}
.article-body ul,.article-body ol{padding-left:0}
.article-body li{color:var(--text-2);padding-left:20px;position:relative;margin-bottom:8px}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;width:6px;height:6px;border-radius:2px;
  background:var(--brand-primary);opacity:.85;
}
.article-body ol{counter-reset:olc}
.article-body ol li{counter-increment:olc}
.article-body ol li::before{
  content:counter(olc);position:absolute;left:0;top:.1em;
  font-size:13px;font-weight:600;color:var(--brand-primary);
}
.article-body a{color:var(--brand-primary);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.article-body a:hover{color:#7DF0E2}
.article-body blockquote{
  margin:26px 0;padding:18px 22px;
  border-left:3px solid var(--brand-primary);
  background:var(--glass);border-radius:0 var(--r-sm) var(--r-sm) 0;
  color:var(--text-2);font-size:15.5px;
}
.article-body blockquote p{color:var(--text-2);margin:0}
.article-body img{border-radius:var(--r-md);border:1px solid var(--stroke);margin:26px 0 10px}
.article-body figure{margin:0}
.article-body figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:8px}
.article-body table{
  width:100%;border-collapse:collapse;margin:26px 0;font-size:14.5px;
  display:block;overflow-x:auto;white-space:nowrap;
  border:1px solid var(--stroke);border-radius:var(--r-sm);
}
.article-body thead th{
  background:rgba(124,107,255,.14);color:var(--text-1);font-weight:600;
  padding:12px 16px;text-align:left;border-bottom:1px solid var(--stroke);
}
.article-body tbody td{padding:12px 16px;color:var(--text-2);border-bottom:1px solid var(--stroke-soft)}
.article-body tbody tr:last-child td{border-bottom:0}
.article-body code{
  font-size:14px;padding:2px 6px;border-radius:6px;
  background:var(--bg-inset);border:1px solid var(--stroke-soft);color:#9FF3E7;
}
.article-body hr{border:0;height:1px;background:linear-gradient(90deg,transparent,var(--stroke),transparent);margin:40px 0}

/* ---------- 文末操作 ---------- */
.article-foot{max-width:752px;margin:44px auto 0}
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;padding-top:24px;border-top:1px solid var(--stroke-soft)}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:7px 13px;border-radius:var(--r-pill);
  font-size:13px;color:var(--text-2);border:1px solid var(--stroke);background:rgba(255,255,255,.03);
  transition:color .16s ease,border-color .16s ease,background .16s ease;
}
.tag:hover{color:var(--brand-primary);border-color:var(--stroke-strong);background:rgba(75,225,208,.08)}
.share-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:22px}
.share-row span{font-size:13.5px;color:var(--text-3);margin-right:4px}
.icon-btn{
  width:44px;height:44px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--stroke);background:rgba(255,255,255,.03);color:var(--text-2);cursor:pointer;
  transition:transform .16s ease,color .16s ease,border-color .16s ease,background .16s ease;
}
.icon-btn:hover{color:var(--brand-primary);border-color:var(--stroke-strong);background:rgba(75,225,208,.08);transform:translateY(-2px)}

/* ---------- 空态 ---------- */
.empty-card{
  max-width:720px;margin:0 auto;padding:48px 32px;text-align:center;
  background:var(--glass);border:1px solid var(--stroke);border-radius:var(--r-md);box-shadow:var(--shadow-1);
}
.empty-card .empty-icon{
  width:52px;height:52px;margin:0 auto 18px;border-radius:16px;display:grid;place-items:center;
  color:var(--brand-primary);background:rgba(75,225,208,.12);border:1px solid var(--stroke-strong);
}
.empty-card h3{font-size:20px}
.empty-card p{margin-top:10px;color:var(--text-2);font-size:15px}
.empty-card .btn{margin-top:22px}

/* ---------- 相关推荐 ---------- */
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rel-card{
  position:relative;display:flex;flex-direction:column;gap:14px;
  padding:24px;border-radius:var(--r-md);
  background:var(--glass);border:1px solid var(--stroke);box-shadow:var(--shadow-1);
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
  overflow:hidden;
}
.rel-card::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:linear-gradient(180deg,var(--brand-primary),var(--brand-secondary));
  transform:scaleY(0);transform-origin:top;transition:transform .2s ease;
}
.rel-card:hover{transform:translateY(-3px);border-color:var(--stroke-strong);box-shadow:var(--shadow-2)}
.rel-card:hover::before{transform:scaleY(1)}
.rel-card img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-sm);border:1px solid var(--stroke)}
.rel-card h3{font-size:17px;font-weight:600;line-height:1.5}
.rel-card p{font-size:14px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-card__meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3)}

/* ---------- 上一篇 / 下一篇 ---------- */
.pn-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:32px}
.pn-card{
  display:flex;flex-direction:column;gap:8px;padding:22px 24px;
  border:1px solid var(--stroke);border-radius:var(--r-md);background:rgba(255,255,255,.02);
  transition:transform .18s ease,border-color .18s ease,background .18s ease;
}
.pn-card:hover{transform:translateY(-3px);border-color:var(--stroke-strong);background:rgba(75,225,208,.06)}
.pn-card em{font-style:normal;font-size:12.5px;color:var(--text-3);letter-spacing:.08em}
.pn-card strong{font-size:16px;font-weight:600}
.pn-card--next{text-align:right}
.back-row{display:flex;justify-content:center;margin-top:34px}

/* ---------- 底部 CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;
  padding:56px 40px;border-radius:var(--r-lg);
  background:linear-gradient(140deg,rgba(13,18,38,.92),rgba(10,14,32,.92));
  border:1px solid var(--stroke);box-shadow:var(--shadow-2);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:
    radial-gradient(1.4px 1.4px at 16% 26%,rgba(234,240,255,.5),transparent 60%),
    radial-gradient(1.4px 1.4px at 68% 16%,rgba(75,225,208,.5),transparent 60%),
    radial-gradient(1.4px 1.4px at 88% 72%,rgba(124,107,255,.5),transparent 60%),
    radial-gradient(1.2px 1.2px at 38% 82%,rgba(255,201,120,.45),transparent 60%);
}
.cta-band__text{position:relative;z-index:1;max-width:600px}
.cta-band__text h2{font-size:clamp(21px,2.4vw,29px)}
.cta-band__text p{margin-top:12px;color:var(--text-2);font-size:15px}
.cta-band__actions{position:relative;z-index:1;display:flex;align-items:center;gap:16px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:72px;padding:64px 0 28px;background:var(--bg-deep);border-top:1px solid var(--stroke-soft)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand .brand__mark{width:40px;height:40px;flex:0 0 40px}
.footer-brand strong{font-size:16px;font-weight:600}
.footer-col p{font-size:14px;color:var(--text-3);line-height:1.85;max-width:340px}
.footer-col h4{font-size:14px;color:var(--text-2);font-weight:600;margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:var(--text-3);transition:color .16s ease,transform .16s ease;display:inline-flex;min-height:24px;align-items:center}
.footer-links a:hover{color:var(--brand-primary);transform:translateX(3px)}
.footer-const{height:1px;margin:44px 0 22px;background:linear-gradient(90deg,transparent,rgba(75,225,208,.4),rgba(124,107,255,.35),transparent)}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:13px;color:var(--text-3)}
.footer-bottom i{font-style:normal;color:var(--signal);margin-left:8px;position:relative;padding-left:14px}
.footer-bottom i::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:7px;height:7px;border-radius:50%;background:var(--signal);box-shadow:0 0 8px rgba(53,227,154,.8)}

/* 修正 Foundation 默认外观 */
a:hover,a:focus{color:var(--brand-primary)}
button,.button{background-image:none}
input,select,textarea{font-family:inherit}
.accordion,.tabs{border:0;background:transparent}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .container{padding:0 24px}
  .section{padding:72px 0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .related-grid{grid-template-columns:1fr 1fr}
  .nav-links{gap:6px}
  .nav-link{padding:9px 11px;font-size:13.5px}
}
@media (max-width:820px){
  .nav-toggle{display:inline-flex}
  .nav-links{
    position:absolute;top:calc(100% + 10px);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:8px;
    padding:14px;border-radius:var(--r-lg);
    background:rgba(8,11,26,.97);
    border:1px solid var(--stroke);box-shadow:var(--shadow-2);
    backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    display:none;
  }
  .nav-links.is-open{display:flex}
  .nav-link{justify-content:flex-start;font-size:14px}
  .nav-card{flex-wrap:wrap}
}
@media (max-width:640px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .article-hero{padding:22px 0 30px}
  .article-shell{padding:36px 0 16px}
  .article-body{font-size:15.5px;line-height:1.85}
  .related-grid{grid-template-columns:1fr}
  .pn-grid{grid-template-columns:1fr}
  .pn-card--next{text-align:left}
  .cta-band{padding:36px 24px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .brand__text em{display:none}
}
@media (max-width:480px){
  .brand__text strong{font-size:15px}
  .btn{padding:0 18px;font-size:14.5px}
  .article-meta{gap:8px 14px;font-size:13px}
}

/* roulang page: category1 */
/* ============ 一、设计变量 ============ */
:root{
  --bg-deep:#05070F;
  --bg-base:#080B1A;
  --bg-raise:#0D1226;
  --bg-inset:#0A0E20;

  --brand-primary:#4BE1D0;
  --brand-secondary:#7C6BFF;
  --accent-star:#FFC978;
  --signal:#35E39A;

  --text-1:#EAF0FF;
  --text-2:rgba(234,240,255,.68);
  --text-3:rgba(234,240,255,.42);

  --stroke:rgba(255,255,255,.10);
  --stroke-strong:rgba(75,225,208,.35);
  --stroke-soft:rgba(255,255,255,.06);

  --glass:rgba(18,24,48,.55);

  --shadow-1:0 8px 24px rgba(3,6,18,.45);
  --shadow-2:0 18px 48px rgba(3,6,18,.60);
  --shadow-glow:0 0 0 1px rgba(75,225,208,.35), 0 10px 30px rgba(75,225,208,.16);

  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --r-pill:999px;

  --s1:4px; --s2:8px; --s3:12px; --s4:16px; --s5:24px; --s6:32px; --s7:48px; --s8:72px; --s9:96px;

  --font-cn:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  --font-num:"Barlow","DIN Alternate","Helvetica Neue",Arial,sans-serif;
}

/* ============ 二、基础重置 ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--text-1);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    radial-gradient(1.4px 1.4px at 12% 18%, rgba(234,240,255,.30), transparent 60%),
    radial-gradient(1.2px 1.2px at 78% 12%, rgba(75,225,208,.26), transparent 60%),
    radial-gradient(1.2px 1.2px at 42% 72%, rgba(234,240,255,.18), transparent 60%),
    radial-gradient(1.6px 1.6px at 88% 62%, rgba(124,107,255,.24), transparent 60%),
    radial-gradient(1.1px 1.1px at 24% 88%, rgba(234,240,255,.16), transparent 60%);
  opacity:.7;
}
h1,h2,h3,h4,h5,h6,p,figure,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
a{color:inherit;text-decoration:none;background:transparent;}
img{max-width:100%;display:block;height:auto;}
button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input,textarea,select{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--brand-primary);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(75,225,208,.28);color:#fff;}

/* Foundation 默认味道覆盖 */
body,button,input,select,textarea{font-family:var(--font-cn);}
a{color:var(--brand-primary);}
a:hover{color:var(--brand-primary);}
h1,h2,h3,h4{font-family:var(--font-cn);color:var(--text-1);font-weight:600;letter-spacing:.01em;line-height:1.35;}
.button,button.button{background:transparent;}

/* ============ 三、布局容器 ============ */
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:32px;
  padding-right:32px;
  position:relative;
  z-index:1;
}
.section{padding:96px 0;position:relative;z-index:1;}
.section--tight{padding:72px 0;}
.section--inset{background:var(--bg-deep);border-top:1px solid var(--stroke-soft);border-bottom:1px solid var(--stroke-soft);}

.sec-head{margin-bottom:var(--s7);max-width:760px;}
.sec-head--center{margin-left:auto;margin-right:auto;text-align:center;}
.sec-head h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;margin-bottom:var(--s3);}
.sec-head p{color:var(--text-2);font-size:16px;}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand-primary);
  padding:6px 14px;border-radius:var(--r-pill);
  background:rgba(75,225,208,.08);
  border:1px solid var(--stroke-strong);
  margin-bottom:var(--s4);
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand-primary);box-shadow:0 0 8px var(--brand-primary);}

/* ============ 四、导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  padding-top:14px;
  transition:padding .25s ease;
}
.nav-card{
  position:relative;
  display:flex;align-items:center;gap:var(--s5);
  padding:12px 16px;
  border-radius:var(--r-lg);
  background:var(--glass);
  border:1px solid var(--stroke);
  box-shadow:var(--shadow-1);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  transition:padding .25s ease,background .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.site-header.is-stuck{padding-top:8px;}
.site-header.is-stuck .nav-card{
  padding:8px 14px;
  background:rgba(9,12,26,.90);
  box-shadow:var(--shadow-2);
  border-color:var(--stroke-soft);
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand__mark{
  width:38px;height:38px;flex:0 0 38px;
  display:grid;place-items:center;
  border-radius:12px;
  color:var(--brand-primary);
  background:rgba(75,225,208,.10);
  border:1px solid var(--stroke-strong);
  box-shadow:0 0 18px rgba(75,225,208,.14);
}
.brand__mark svg{width:22px;height:22px;}
.brand__text strong{display:block;font-size:15px;font-weight:600;line-height:1.2;white-space:nowrap;}
.brand__text em{display:block;font-style:normal;font-size:12px;color:var(--text-3);margin-top:2px;white-space:nowrap;}

.nav-links{display:flex;align-items:center;justify-content:center;gap:8px;flex:1 1 auto;flex-wrap:wrap;}
.nav-link{
  display:inline-flex;align-items:center;gap:7px;
  min-height:44px;
  padding:9px 14px;
  border-radius:var(--r-sm);
  font-size:14px;
  color:var(--text-2);
  border:1px solid transparent;
  transition:color .16s ease,background .16s ease,border-color .16s ease;
}
.nav-link:hover{color:var(--text-1);background:rgba(255,255,255,.05);border-color:var(--stroke);}
.nav-link.is-active{
  color:var(--text-1);
  background:rgba(75,225,208,.10);
  border-color:var(--stroke-strong);
  box-shadow:inset 0 0 0 1px rgba(75,225,208,.08);
}
.nav-link__dot{width:6px;height:6px;border-radius:50%;background:var(--text-3);transition:background .16s ease,box-shadow .16s ease;}
.nav-link.is-active .nav-link__dot{background:var(--brand-primary);box-shadow:0 0 8px var(--brand-primary);}
.nav-link:hover .nav-link__dot{background:var(--brand-primary);}

.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;margin-left:auto;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:var(--r-sm);
  border:1px solid var(--stroke);
  color:var(--text-1);
  background:rgba(255,255,255,.04);
  place-items:center;
  transition:background .16s ease,border-color .16s ease;
}
.nav-toggle:hover{background:rgba(75,225,208,.10);border-color:var(--stroke-strong);}
.nav-toggle svg{width:22px;height:22px;}

/* ============ 五、按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;
  padding:12px 22px;
  border-radius:var(--r-pill);
  font-size:15px;font-weight:600;
  letter-spacing:.01em;
  border:1px solid transparent;
  white-space:nowrap;
  transition:transform .16s ease,box-shadow .16s ease,filter .16s ease,background .16s ease,border-color .16s ease,color .16s ease;
}
.btn--primary{
  color:#04121A;
  background:linear-gradient(120deg,var(--brand-primary),var(--brand-secondary));
  box-shadow:var(--shadow-glow);
}
.btn--primary:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(75,225,208,.45),0 14px 36px rgba(75,225,208,.24);}
.btn--primary:active{transform:translateY(1px);}
.btn--ghost{
  color:var(--text-1);
  background:transparent;
  border-color:var(--stroke-strong);
}
.btn--ghost:hover{background:rgba(75,225,208,.10);color:var(--brand-primary);transform:translateY(-2px);}
.btn--ghost:active{transform:translateY(1px);}
.btn--sm{min-height:38px;padding:8px 16px;font-size:13.5px;}

.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:500;
  color:var(--brand-primary);
}
.text-link svg{width:16px;height:16px;transition:transform .18s ease;}
.text-link:hover svg{transform:translateX(4px);}

/* ============ 六、徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;
  border-radius:8px;
  font-size:12.5px;font-weight:500;
  line-height:1.6;
}
.badge--purple{color:#C3BAFF;background:rgba(124,107,255,.14);}
.badge--green{color:var(--signal);background:rgba(53,227,154,.12);}
.badge--gold{color:var(--accent-star);background:rgba(255,201,120,.13);}
.badge--teal{color:var(--brand-primary);background:rgba(75,225,208,.11);}

.tag-row{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  font-size:12.5px;color:var(--text-3);
  padding:3px 10px;
  border-radius:8px;
  border:1px solid var(--stroke-soft);
  background:rgba(255,255,255,.03);
}

/* ============ 七、Hero ============ */
.cat-hero{
  position:relative;
  padding:64px 0 88px;
  overflow:hidden;
}
.cat-hero__bg{
  position:absolute;inset:0;
  background:url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
  opacity:.34;
}
.cat-hero__bg::after{
  content:"";
  position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(5,7,15,.82) 0%,rgba(8,11,26,.90) 62%,var(--bg-base) 100%),
    radial-gradient(900px 420px at 82% 12%,rgba(124,107,255,.20),transparent 70%);
}
.cat-hero__inner{position:relative;z-index:2;max-width:820px;}
.breadcrumb{
  display:flex;align-items:center;gap:8px;
  font-size:13.5px;color:var(--text-3);
  margin-bottom:var(--s5);
}
.breadcrumb a{color:var(--text-3);transition:color .16s ease;}
.breadcrumb a:hover{color:var(--brand-primary);}
.breadcrumb .current{color:var(--text-2);}
.cat-hero h1{
  font-size:clamp(28px,4vw,44px);
  font-weight:700;
  letter-spacing:.01em;
  line-height:1.3;
  margin-bottom:var(--s4);
}
.cat-hero h1 span{color:var(--brand-primary);}
.cat-hero__sub{
  font-size:17px;
  color:var(--text-2);
  max-width:640px;
  margin-bottom:var(--s6);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}

.hero-scale{
  margin-top:var(--s8);
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:var(--s5);
  padding-top:var(--s5);
  border-top:1px solid var(--stroke-soft);
  position:relative;
}
.hero-scale::before{
  content:"";
  position:absolute;top:-1px;left:0;width:180px;height:1px;
  background:linear-gradient(90deg,var(--brand-primary),transparent);
}
.scale-item{display:flex;gap:12px;align-items:flex-start;}
.scale-item__num{
  font-family:var(--font-num);
  font-size:15px;font-weight:600;
  color:var(--accent-star);
  font-variant-numeric:tabular-nums;
  padding-top:2px;
}
.scale-item strong{display:block;font-size:15px;font-weight:600;margin-bottom:2px;}
.scale-item p{font-size:13.5px;color:var(--text-3);line-height:1.7;}

/* ============ 八、Chips ============ */
.chips-wrap{
  padding:0 0 64px;
  position:relative;
  z-index:2;
}
.chips-title{
  font-size:13.5px;
  color:var(--text-3);
  margin-bottom:var(--s4);
  display:flex;align-items:center;gap:10px;
}
.chips-title::after{content:"";flex:1;height:1px;background:linear-gradient(90deg,var(--stroke),transparent);}
.chips{display:flex;flex-wrap:wrap;gap:10px;}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  min-height:44px;
  padding:10px 18px;
  border-radius:var(--r-pill);
  font-size:14px;
  color:var(--text-2);
  background:var(--glass);
  border:1px solid var(--stroke);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  transition:color .16s ease,border-color .16s ease,background .16s ease,transform .16s ease;
}
.chip:hover{color:var(--text-1);border-color:var(--stroke-strong);background:rgba(75,225,208,.10);transform:translateY(-2px);}
.chip i{width:6px;height:6px;border-radius:50%;background:var(--brand-secondary);display:block;}

/* ============ 九、入口卡片网格 ============ */
.entry-grid .cell{margin-bottom:0;}
.entry-card{
  position:relative;
  height:100%;
  display:flex;flex-direction:column;
  border-radius:var(--r-md);
  background:var(--glass);
  border:1px solid var(--stroke);
  box-shadow:var(--shadow-1);
  overflow:hidden;
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.entry-card::after{
  content:"";
  position:absolute;left:0;top:0;height:100%;width:3px;
  background:var(--brand-primary);
  opacity:0;
  transition:opacity .18s ease;
}
.entry-card:hover{transform:translateY(-3px);border-color:var(--stroke-strong);box-shadow:var(--shadow-2);}
.entry-card:hover::after{opacity:1;}
.entry-card__media{
  position:relative;
  aspect-ratio:16/10;
  overflow:hidden;
  border-bottom:1px solid var(--stroke-soft);
}
.entry-card__media img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .4s ease;
}
.entry-card:hover .entry-card__media img{transform:scale(1.04);}
.entry-card__media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,7,15,.10) 0%,rgba(8,11,26,.78) 100%);
}
.entry-card__media .badge{position:absolute;left:16px;top:16px;z-index:2;}
.entry-card__body{
  padding:24px 26px 26px;
  display:flex;flex-direction:column;flex:1;
}
.entry-card__body h3{font-size:19px;font-weight:600;margin-bottom:10px;}
.entry-card__body p{font-size:14.5px;color:var(--text-2);line-height:1.8;margin-bottom:18px;}
.entry-card__foot{
  margin-top:auto;
  padding-top:16px;
  border-top:1px solid var(--stroke-soft);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.entry-card__foot .tag-row{gap:6px;}

/* ============ 十、对比区 ============ */
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--s6);}
.compare-col{
  padding:28px 28px 8px;
  border-radius:var(--r-md);
  background:var(--bg-inset);
  border:1px solid var(--stroke);
  position:relative;
}
.compare-col--ok{border-top:2px solid var(--brand-primary);}
.compare-col--warn{border-top:2px solid var(--accent-star);}
.compare-col h3{
  font-size:18px;
  display:flex;align-items:center;gap:10px;
  margin-bottom:6px;
}
.compare-col > p.small{font-size:13.5px;color:var(--text-3);margin-bottom:var(--s5);}
.compare-list li{
  display:flex;gap:12px;
  padding:14px 0;
  border-bottom:1px dashed rgba(255,255,255,.08);
  font-size:14.5px;
  color:var(--text-2);
  line-height:1.75;
}
.compare-list li:last-child{border-bottom:0;}
.compare-list .mark{
  flex:0 0 20px;width:20px;height:20px;margin-top:4px;
  display:grid;place-items:center;
  border-radius:6px;
  font-size:12px;font-weight:700;
}
.compare-col--ok .mark{color:var(--signal);background:rgba(53,227,154,.12);}
.compare-col--warn .mark{color:var(--accent-star);background:rgba(255,201,120,.13);}
.compare-list strong{color:var(--text-1);font-weight:600;}

/* ============ 十一、FAQ ============ */
.faq-list{max-width:900px;margin:0 auto;display:flex;flex-direction:column;gap:14px;}
.faq-item{
  border-radius:var(--r-md);
  background:var(--glass);
  border:1px solid var(--stroke);
  box-shadow:var(--shadow-1);
  overflow:hidden;
  position:relative;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item::before{
  content:"";
  position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--brand-primary);
  opacity:.35;
  transition:opacity .2s ease;
}
.faq-item.is-open{border-color:var(--stroke-strong);box-shadow:var(--shadow-2);}
.faq-item.is-open::before{opacity:1;}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 26px 20px 30px;
  text-align:left;
  font-size:16px;font-weight:500;color:var(--text-1);
  min-height:44px;
}
.faq-q .ic{
  flex:0 0 26px;width:26px;height:26px;
  display:grid;place-items:center;
  border-radius:8px;
  border:1px solid var(--stroke);
  color:var(--brand-primary);
  transition:transform .2s ease,background .2s ease,border-color .2s ease;
}
.faq-item.is-open .faq-q .ic{transform:rotate(45deg);background:rgba(75,225,208,.14);border-color:var(--stroke-strong);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .22s ease;
}
.faq-a__inner{
  padding:0 30px 22px;
  font-size:14.5px;
  color:var(--text-2);
  line-height:1.85;
}
.faq-item.is-open .faq-a{max-height:340px;}

/* ============ 十二、CTA ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  border-radius:var(--r-lg);
  border:1px solid var(--stroke);
  background:var(--bg-raise);
  padding:56px 48px;
  box-shadow:var(--shadow-2);
}
.cta-band__bg{
  position:absolute;inset:0;
  background:url("/assets/images/backpic/back-2.png") center/cover no-repeat;
  opacity:.26;
}
.cta-band__bg::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(8,11,26,.94) 0%,rgba(13,18,38,.86) 55%,rgba(8,11,26,.92) 100%);
}
.cta-band__inner{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:var(--s6);align-items:center;justify-content:space-between;}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;margin-bottom:10px;}
.cta-band p{color:var(--text-2);font-size:15px;max-width:620px;}
.cta-band__actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}

/* ============ 十三、页脚 ============ */
.site-footer{
  margin-top:var(--s9);
  background:var(--bg-deep);
  border-top:1px solid var(--stroke-soft);
  padding:72px 0 28px;
  position:relative;
  z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:var(--s6);
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand strong{font-size:16px;font-weight:600;}
.footer-col p{font-size:13.5px;color:var(--text-3);line-height:1.8;max-width:320px;}
.footer-col h4{
  font-size:14px;font-weight:500;color:var(--text-2);
  margin-bottom:var(--s4);
  letter-spacing:.04em;
}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{
  font-size:14px;color:var(--text-3);
  display:inline-flex;align-items:center;min-height:24px;
  transition:color .16s ease,transform .16s ease;
}
.footer-links a:hover{color:var(--brand-primary);transform:translateX(3px);}
.footer-const{
  height:1px;
  margin:var(--s7) 0 var(--s5);
  background:linear-gradient(90deg,transparent,rgba(75,225,208,.45),rgba(124,107,255,.35),transparent);
}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;
  justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
.footer-bottom i{
  font-style:normal;color:var(--signal);
  display:inline-flex;align-items:center;gap:6px;
  margin-left:10px;
}
.footer-bottom i::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--signal);box-shadow:0 0 8px var(--signal);}

/* ============ 十四、响应式 ============ */
@media (max-width:1199px){
  .container{padding-left:28px;padding-right:28px;}
}
@media (max-width:1023px){
  .section{padding:72px 0;}
  .section--tight{padding:56px 0;}
  .nav-toggle{display:grid;}
  .nav-card{flex-wrap:wrap;}
  .nav-links{
    position:absolute;
    left:0;right:0;
    top:calc(100% + 10px);
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    padding:14px;
    border-radius:var(--r-md);
    background:rgba(9,12,26,.97);
    border:1px solid var(--stroke);
    box-shadow:var(--shadow-2);
    -webkit-backdrop-filter:blur(16px);
    backdrop-filter:blur(16px);
  }
  .nav-links.is-open{display:flex;}
  .nav-link{justify-content:flex-start;padding:12px 14px;background:rgba(255,255,255,.03);border-color:var(--stroke-soft);}
  .nav-link.is-active{background:rgba(75,225,208,.12);}
  .compare-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:var(--s6);}
  .hero-scale{grid-template-columns:1fr;gap:var(--s4);}
  .cta-band{padding:44px 32px;}
}
@media (max-width:767px){
  .container{padding-left:20px;padding-right:20px;}
  .section{padding:56px 0;}
  .section--tight{padding:48px 0;}
  .brand__text em{display:none;}
  .cat-hero{padding:40px 0 64px;}
  .cat-hero__sub{font-size:15.5px;}
  .chips-wrap{padding-bottom:48px;}
  .entry-card__body{padding:20px 20px 22px;}
  .compare-col{padding:22px 20px 6px;}
  .faq-q{padding:18px 20px 18px 24px;font-size:15px;gap:14px;}
  .faq-a__inner{padding:0 24px 20px;}
  .cta-band{padding:36px 22px;border-radius:var(--r-md);}
  .cta-band__inner{flex-direction:column;align-items:flex-start;}
  .cta-band__actions{width:100%;}
  .cta-band__actions .btn{flex:1 1 auto;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
  .site-footer{margin-top:64px;padding-top:56px;}
}
@media (max-width:480px){
  .cat-hero h1{font-size:26px;}
  .hero-actions .btn{width:100%;}
  .entry-card__foot{flex-direction:column;align-items:flex-start;gap:12px;}
}

/* roulang page: category2 */
:root{
  --bg-deep:#05070F;
  --bg-base:#080B1A;
  --bg-raise:#0D1226;
  --bg-inset:#0A0E20;
  --brand-primary:#4BE1D0;
  --brand-secondary:#7C6BFF;
  --accent-star:#FFC978;
  --signal:#35E39A;
  --warn:#FF6B6B;
  --text-1:#EAF0FF;
  --text-2:rgba(234,240,255,.68);
  --text-3:rgba(234,240,255,.42);
  --stroke:rgba(255,255,255,.10);
  --stroke-strong:rgba(75,225,208,.35);
  --stroke-soft:rgba(255,255,255,.06);
  --glass:rgba(18,24,48,.55);
  --shadow-1:0 8px 24px rgba(3,6,18,.45);
  --shadow-2:0 18px 48px rgba(3,6,18,.60);
  --shadow-glow:0 0 0 1px rgba(75,225,208,.35),0 10px 30px rgba(75,225,208,.16);
  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --r-pill:999px;
  --s1:4px;--s2:8px;--s3:12px;--s4:16px;--s5:24px;--s6:32px;--s7:48px;--s8:72px;--s9:96px;
  --font-cn:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--text-1);
  background:var(--bg-base);
  background-image:radial-gradient(900px 520px at 82% -10%, rgba(124,107,255,.14), transparent 70%),
                   radial-gradient(760px 460px at 6% 8%, rgba(75,225,208,.09), transparent 72%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none;transition:color .16s ease}
a:focus-visible,button:focus-visible{outline:2px solid var(--brand-primary);outline-offset:2px;border-radius:6px}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:.01em;line-height:1.35}
p{margin:0}
::selection{background:rgba(75,225,208,.3);color:#fff}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 var(--s6)}
.section{padding:96px 0;position:relative}
.section--tight{padding:72px 0}
.section__head{max-width:760px;margin-bottom:var(--s7)}
.section__head--center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:var(--s2);
  font-size:13px;letter-spacing:.08em;color:var(--brand-primary);
  background:rgba(75,225,208,.08);border:1px solid rgba(75,225,208,.22);
  border-radius:var(--r-pill);padding:6px 14px;margin-bottom:var(--s4);
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand-primary);box-shadow:0 0 10px rgba(75,225,208,.8)}
.section__title{font-size:clamp(22px,2.6vw,32px);font-weight:700;margin-bottom:var(--s4)}
.section__desc{color:var(--text-2);font-size:16px;line-height:1.85}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;white-space:nowrap;
  transition:transform .16s ease,box-shadow .16s ease,background .16s ease,border-color .16s ease,filter .16s ease;
}
.btn--primary{
  color:#04120F;
  background:linear-gradient(120deg,var(--brand-primary),var(--brand-secondary));
  box-shadow:0 0 0 1px rgba(75,225,208,.35),0 10px 26px rgba(75,225,208,.22);
}
.btn--primary:hover{transform:translateY(-2px);filter:brightness(1.06) saturate(1.05);box-shadow:0 0 0 1px rgba(75,225,208,.55),0 16px 34px rgba(75,225,208,.3)}
.btn--primary:active{transform:translateY(1px)}
.btn--ghost{
  color:var(--text-1);background:transparent;border:1px solid var(--stroke-strong);
}
.btn--ghost:hover{background:rgba(75,225,208,.1);transform:translateY(-2px)}
.btn--ghost:active{transform:translateY(1px)}
.btn--sm{min-height:38px;padding:0 16px;font-size:14px;border-radius:var(--r-pill)}
.btn--block{width:100%}

.link-cta{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand-primary);
}
.link-cta svg{width:15px;height:15px;transition:transform .18s ease}
.link-cta:hover{color:#7ff0e2}
.link-cta:hover svg{transform:translateX(4px)}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  padding:16px 0;
  background:linear-gradient(180deg,rgba(5,7,15,.82),rgba(5,7,15,.42));
  backdrop-filter:blur(8px);
  transition:padding .2s ease,background .2s ease;
}
.site-header.is-scrolled{padding:8px 0;background:linear-gradient(180deg,rgba(5,7,15,.96),rgba(5,7,15,.86))}
.nav-card{
  position:relative;
  display:flex;align-items:center;gap:var(--s5);
  padding:12px 18px;
  border-radius:var(--r-lg);
  background:var(--glass);
  border:1px solid var(--stroke);
  box-shadow:var(--shadow-1);
  backdrop-filter:blur(14px);
}
.nav-card::before{
  content:"";position:absolute;left:18px;right:18px;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.22),transparent);
}
.brand{display:flex;align-items:center;gap:var(--s3);flex:0 0 auto}
.brand__mark{
  width:40px;height:40px;flex:0 0 40px;display:grid;place-items:center;
  border-radius:12px;color:var(--brand-primary);
  background:linear-gradient(150deg,rgba(75,225,208,.18),rgba(124,107,255,.16));
  border:1px solid rgba(75,225,208,.3);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.14);
}
.brand__mark svg{width:22px;height:22px}
.brand__text{display:flex;flex-direction:column;line-height:1.25}
.brand__text strong{font-size:15px;font-weight:700;letter-spacing:.01em}
.brand__text em{font-style:normal;font-size:11.5px;color:var(--text-3);letter-spacing:.04em}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 14px;border-radius:var(--r-sm);
  font-size:14px;color:var(--text-2);
  border:1px solid transparent;
  transition:background .16s ease,color .16s ease,border-color .16s ease;
}
.nav-link__dot{width:5px;height:5px;border-radius:50%;background:currentColor;opacity:.45}
.nav-link:hover{color:var(--text-1);background:rgba(255,255,255,.05);border-color:var(--stroke-soft)}
.nav-link.is-active{
  color:var(--text-1);background:rgba(75,225,208,.1);
  border-color:rgba(75,225,208,.3);
}
.nav-link.is-active .nav-link__dot{background:var(--brand-primary);opacity:1;box-shadow:0 0 8px rgba(75,225,208,.9)}
.nav-actions{display:flex;align-items:center;gap:var(--s3);flex:0 0 auto}
.nav-toggle{
  display:none;width:44px;height:44px;place-items:center;border-radius:var(--r-sm);
  border:1px solid var(--stroke);color:var(--text-1);background:rgba(255,255,255,.03);
}
.nav-toggle svg{width:20px;height:20px}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;padding:56px 0 76px}
.hero__bg{
  position:absolute;inset:0;
  background-image:linear-gradient(120deg,rgba(5,7,15,.94),rgba(8,11,26,.78)),url(/assets/images/backpic/back-2.png);
  background-size:cover;background-position:center;
}
.hero__stars{
  position:absolute;inset:0;pointer-events:none;opacity:.6;
  background-image:
    radial-gradient(1.5px 1.5px at 14% 24%, rgba(234,240,255,.55), transparent 60%),
    radial-gradient(1.5px 1.5px at 76% 16%, rgba(75,225,208,.55), transparent 60%),
    radial-gradient(1.5px 1.5px at 62% 74%, rgba(234,240,255,.35), transparent 60%),
    radial-gradient(1.5px 1.5px at 32% 84%, rgba(124,107,255,.45), transparent 60%),
    radial-gradient(1.5px 1.5px at 90% 58%, rgba(255,201,120,.35), transparent 60%);
  background-repeat:no-repeat;
}
.hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--text-3);margin-bottom:var(--s5)}
.breadcrumb a{color:var(--text-3)}
.breadcrumb a:hover{color:var(--brand-primary)}
.breadcrumb span[aria-current]{color:var(--text-2)}
.hero__grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:var(--s8);align-items:center}
.hero h1{font-size:clamp(28px,4vw,44px);font-weight:700;line-height:1.28;margin-bottom:var(--s4)}
.hero h1 em{font-style:normal;color:var(--brand-primary)}
.hero__sub{color:var(--text-2);font-size:17px;max-width:620px;margin-bottom:var(--s6)}
.hero__actions{display:flex;flex-wrap:wrap;gap:var(--s3)}
.hero__panel{
  border-radius:var(--r-lg);padding:var(--s5);
  background:var(--glass);border:1px solid var(--stroke);
  box-shadow:var(--shadow-2);backdrop-filter:blur(14px);position:relative;overflow:hidden;
}
.hero__panel::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(255,255,255,.07),transparent 42%);pointer-events:none}
.hero__panel h2{font-size:17px;font-weight:600;margin-bottom:var(--s4);display:flex;align-items:center;gap:var(--s2)}
.hero__panel h2 b{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--signal);box-shadow:0 0 10px rgba(53,227,154,.9)}
.panel-list{display:flex;flex-direction:column;gap:var(--s3)}
.panel-list li{
  display:flex;align-items:flex-start;gap:var(--s3);
  padding:12px 14px;border-radius:var(--r-sm);
  background:rgba(255,255,255,.03);border:1px solid var(--stroke-soft);
  font-size:14.5px;color:var(--text-2);
}
.panel-list li strong{color:var(--text-1);font-weight:600}
.panel-list li i{
  font-style:normal;flex:0 0 22px;width:22px;height:22px;margin-top:4px;
  display:grid;place-items:center;border-radius:7px;font-size:11px;font-weight:700;
  color:var(--brand-primary);background:rgba(75,225,208,.12);border:1px solid rgba(75,225,208,.25);
}

/* ============ 状态刻度条 ============ */
.status-strip{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-radius:var(--r-md);
  background:var(--glass);border:1px solid var(--stroke);
  box-shadow:var(--shadow-1);overflow:hidden;
}
.status-cell{padding:22px var(--s5);position:relative}
.status-cell + .status-cell::before{
  content:"";position:absolute;left:0;top:18px;bottom:18px;width:1px;
  background:linear-gradient(180deg,transparent,rgba(75,225,208,.35),transparent);
}
.status-cell strong{display:block;font-size:30px;font-weight:700;font-variant-numeric:tabular-nums;letter-spacing:.01em;color:var(--text-1)}
.status-cell strong span{font-size:15px;color:var(--brand-primary);margin-left:2px}
.status-cell em{font-style:normal;display:block;font-size:13.5px;color:var(--text-3);margin-top:4px}

/* ============ 图文引言 ============ */
.intro-grid{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:var(--s8);align-items:center}
.figure{
  position:relative;border-radius:var(--r-md);overflow:hidden;
  border:1px solid var(--stroke);box-shadow:var(--shadow-2);
}
.figure::after{content:"";position:absolute;inset:0;box-shadow:inset 0 1px 0 rgba(255,255,255,.14);border-radius:var(--r-md)}
.figure img{width:100%;height:100%;aspect-ratio:16/11;object-fit:cover}
.figure__tag{
  position:absolute;left:16px;bottom:16px;z-index:2;
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 14px;border-radius:var(--r-pill);font-size:13px;
  background:rgba(5,7,15,.72);border:1px solid var(--stroke);color:var(--text-2);backdrop-filter:blur(8px);
}
.figure__tag b{width:6px;height:6px;border-radius:50%;background:var(--accent-star);box-shadow:0 0 8px rgba(255,201,120,.8)}
.point-list{display:flex;flex-direction:column;gap:var(--s4);margin-top:var(--s5)}
.point-list li{display:flex;gap:var(--s4);align-items:flex-start}
.point-list .ico{
  flex:0 0 44px;width:44px;height:44px;display:grid;place-items:center;border-radius:12px;
  color:var(--brand-primary);background:rgba(75,225,208,.1);border:1px solid rgba(75,225,208,.22);
  box-shadow:0 0 18px rgba(75,225,208,.12);
}
.point-list .ico svg{width:21px;height:21px}
.point-list h3{font-size:16.5px;font-weight:600;margin-bottom:2px}
.point-list p{font-size:14.5px;color:var(--text-2);line-height:1.8}

/* ============ 双栏：sticky 概览 + 步骤刻度 ============ */
.split{display:grid;grid-template-columns:minmax(0,360px) minmax(0,1fr);gap:var(--s7);align-items:start}
.overview{
  position:sticky;top:104px;
  border-radius:var(--r-lg);padding:var(--s6);
  background:var(--glass);border:1px solid var(--stroke);
  box-shadow:var(--shadow-1);backdrop-filter:blur(14px);overflow:hidden;
}
.overview::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(255,255,255,.06),transparent 40%);pointer-events:none}
.overview h2{font-size:20px;font-weight:700;margin-bottom:var(--s3)}
.overview > p{font-size:14.5px;color:var(--text-2);margin-bottom:var(--s5)}
.overview__stats{display:grid;grid-template-columns:1fr 1fr;gap:var(--s3);margin-bottom:var(--s5)}
.overview__stat{
  padding:14px;border-radius:var(--r-sm);
  background:var(--bg-inset);border:1px solid var(--stroke-soft);
}
.overview__stat strong{display:block;font-size:26px;font-weight:700;font-variant-numeric:tabular-nums;color:var(--brand-primary)}
.overview__stat span{display:block;font-size:12.5px;color:var(--text-3);margin-top:2px}
.overview__nav{display:flex;flex-direction:column;gap:6px;padding-top:var(--s4);border-top:1px solid var(--stroke-soft)}
.overview__nav a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 12px;border-radius:var(--r-sm);font-size:14px;color:var(--text-2);
  border:1px solid transparent;
}
.overview__nav a:hover{color:var(--text-1);background:rgba(75,225,208,.08);border-color:rgba(75,225,208,.24)}
.overview__nav a svg{width:14px;height:14px;flex:0 0 14px;color:var(--brand-primary)}

.step-track{position:relative;padding-left:76px}
.step-track::before{
  content:"";position:absolute;left:21px;top:24px;bottom:24px;width:1px;
  background:linear-gradient(180deg,transparent,rgba(75,225,208,.4) 12%,rgba(124,107,255,.35) 88%,transparent);
}
.step-item{position:relative;margin-bottom:var(--s5)}
.step-item:last-child{margin-bottom:0}
.step-item__marker{
  position:absolute;left:-76px;top:6px;
  width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
  font-size:14px;font-weight:700;font-variant-numeric:tabular-nums;
  color:var(--brand-primary);
  background:var(--bg-raise);border:1px solid rgba(75,225,208,.32);
  box-shadow:0 0 0 5px var(--bg-base),0 0 20px rgba(75,225,208,.16);
}
.step-item__body{
  border-radius:var(--r-md);padding:24px 26px;
  background:var(--glass);border:1px solid var(--stroke);box-shadow:var(--shadow-1);
  transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease;
}
.step-item__body:hover{transform:translateY(-3px);border-color:var(--stroke-strong);box-shadow:var(--shadow-2)}
.step-item__body h3{font-size:18px;font-weight:600;margin-bottom:8px}
.step-item__body > p{font-size:15px;color:var(--text-2)}
.step-points{display:flex;flex-direction:column;gap:8px;margin-top:var(--s4);padding-top:var(--s4);border-top:1px solid var(--stroke-soft)}
.step-points li{position:relative;padding-left:18px;font-size:14.5px;color:var(--text-2)}
.step-points li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:50%;
  background:rgba(75,225,208,.9);box-shadow:0 0 8px rgba(75,225,208,.6);
}
.step-item__body .link-cta{margin-top:var(--s4)}

/* ============ 对照区 ============ */
.cmp-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--s5)}
.cmp-card{
  border-radius:var(--r-md);padding:var(--s6);
  background:var(--glass);border:1px solid var(--stroke);box-shadow:var(--shadow-1);
}
.cmp-card--do{border-color:rgba(53,227,154,.26)}
.cmp-card--warn{border-color:rgba(255,201,120,.26)}
.cmp-card__head{display:flex;align-items:center;gap:var(--s3);margin-bottom:var(--s5)}
.cmp-card__head .ico{width:42px;height:42px;flex:0 0 42px;display:grid;place-items:center;border-radius:12px}
.cmp-card--do .ico{color:var(--signal);background:rgba(53,227,154,.1);border:1px solid rgba(53,227,154,.28)}
.cmp-card--warn .ico{color:var(--accent-star);background:rgba(255,201,120,.1);border:1px solid rgba(255,201,120,.3)}
.cmp-card__head .ico svg{width:20px;height:20px}
.cmp-card__head h3{font-size:18px;font-weight:600}
.cmp-card__head span{display:block;font-size:13px;color:var(--text-3);font-weight:400}
.cmp-list li{
  position:relative;padding:14px 0 14px 26px;font-size:15px;color:var(--text-2);
}
.cmp-list li::before{
  content:"";position:absolute;left:2px;top:23px;width:8px;height:8px;border-radius:2px;
}
.cmp-card--do .cmp-list li::before{background:var(--signal);box-shadow:0 0 8px rgba(53,227,154,.7)}
.cmp-card--warn .cmp-list li::before{background:var(--accent-star);box-shadow:0 0 8px rgba(255,201,120,.7);border-radius:50%}
.cmp-list li::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,rgba(255,255,255,.16),rgba(255,255,255,.02) 70%,transparent);
}
.cmp-list li:last-child::after{display:none}

/* ============ 风险等级卡 ============ */
.risk-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--s5);margin-top:var(--s7)}
.risk-card{
  border-radius:var(--r-md);padding:26px;
  background:var(--bg-raise);border:1px solid var(--stroke);box-shadow:var(--shadow-1);
  transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease;
}
.risk-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2)}
.risk-card__level{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:600;padding:5px 12px;border-radius:var(--r-pill);margin-bottom:var(--s4)}
.risk-card--low .risk-card__level{color:var(--signal);background:rgba(53,227,154,.1);border:1px solid rgba(53,227,154,.26)}
.risk-card--mid .risk-card__level{color:var(--accent-star);background:rgba(255,201,120,.1);border:1px solid rgba(255,201,120,.28)}
.risk-card--high .risk-card__level{color:var(--warn);background:rgba(255,107,107,.1);border:1px solid rgba(255,107,107,.28)}
.risk-card h3{font-size:17.5px;font-weight:600;margin-bottom:8px}
.risk-card p{font-size:14.5px;color:var(--text-2)}
.risk-card--low:hover{border-color:rgba(53,227,154,.3)}
.risk-card--mid:hover{border-color:rgba(255,201,120,.3)}
.risk-card--high:hover{border-color:rgba(255,107,107,.3)}

/* ============ FAQ ============ */
.faq{display:flex;flex-direction:column;gap:var(--s3);max-width:900px;margin:0 auto}
.faq-item{
  border-radius:var(--r-md);overflow:hidden;
  background:var(--glass);border:1px solid var(--stroke);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.faq-item.is-open{border-color:var(--stroke-strong);box-shadow:var(--shadow-1)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:var(--s4);
  padding:20px 24px;text-align:left;font-size:16px;font-weight:600;color:var(--text-1);
}
.faq-q:hover{color:#fff}
.faq-q .bar{width:3px;height:20px;border-radius:2px;background:var(--stroke-strong);transition:background .18s ease,box-shadow .18s ease}
.faq-item.is-open .faq-q .bar{background:var(--brand-primary);box-shadow:0 0 10px rgba(75,225,208,.8)}
.faq-q .txt{flex:1}
.faq-q .chev{width:20px;height:20px;flex:0 0 20px;color:var(--text-3);transition:transform .2s ease,color .2s ease}
.faq-item.is-open .faq-q .chev{transform:rotate(180deg);color:var(--brand-primary)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease}
.faq-a p{padding:0 24px 22px 51px;font-size:14.8px;color:var(--text-2);line-height:1.85}

/* ============ CTA ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  padding:56px var(--s7);
  background:var(--glass);border:1px solid var(--stroke);box-shadow:var(--shadow-2);
  backdrop-filter:blur(14px);
}
.cta-band__bg{
  position:absolute;inset:0;opacity:.85;
  background-image:linear-gradient(110deg,rgba(5,7,15,.92),rgba(13,18,38,.72)),url(/assets/images/backpic/back-3.png);
  background-size:cover;background-position:center;
}
.cta-band__stars{
  position:absolute;inset:0;opacity:.55;pointer-events:none;
  background-image:
    radial-gradient(1.5px 1.5px at 10% 30%, rgba(75,225,208,.6), transparent 60%),
    radial-gradient(1.5px 1.5px at 84% 26%, rgba(234,240,255,.45), transparent 60%),
    radial-gradient(1.5px 1.5px at 56% 82%, rgba(124,107,255,.5), transparent 60%);
  background-repeat:no-repeat;
}
.cta-band__inner{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:var(--s6);align-items:center}
.cta-band h2{font-size:clamp(21px,2.4vw,28px);font-weight:700;margin-bottom:10px}
.cta-band p{font-size:15.5px;color:var(--text-2);max-width:640px}
.cta-band__actions{display:flex;flex-wrap:wrap;gap:var(--s3);align-items:center}

/* ============ 页脚 ============ */
.site-footer{position:relative;padding:76px 0 30px;background:linear-gradient(180deg,rgba(5,7,15,.2),rgba(5,7,15,.95));border-top:1px solid var(--stroke-soft)}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));gap:var(--s6)}
.footer-col h4{font-size:14px;font-weight:600;color:var(--text-2);margin-bottom:var(--s4);letter-spacing:.04em}
.footer-brand{display:flex;align-items:center;gap:var(--s3);margin-bottom:var(--s4)}
.footer-brand strong{font-size:16px;font-weight:700}
.footer-col p{font-size:14px;color:var(--text-3);line-height:1.85;max-width:360px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:var(--text-3)}
.footer-links a:hover{color:var(--brand-primary)}
.footer-const{height:1px;margin:var(--s7) 0 var(--s4);background:linear-gradient(90deg,transparent,rgba(75,225,208,.4),rgba(124,107,255,.35),transparent)}
.footer-bottom{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:var(--text-3)}
.footer-bottom i{font-style:normal;color:var(--signal);margin-left:8px}
.footer-bottom i::before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--signal);margin-right:6px;box-shadow:0 0 8px rgba(53,227,154,.8)}

/* ============ 响应式 ============ */
@media (max-width:1200px){
  .hero__grid{gap:var(--s7)}
}
@media (max-width:1023px){
  .container{padding:0 var(--s5)}
  .section{padding:64px 0}
  .section--tight{padding:56px 0}
  .nav-toggle{display:inline-grid}
  .nav-links{
    position:absolute;left:0;right:0;top:calc(100% + 10px);
    flex-direction:column;align-items:stretch;gap:8px;margin-left:0;
    padding:12px;border-radius:var(--r-md);
    background:var(--bg-raise);border:1px solid var(--stroke);box-shadow:var(--shadow-2);
    display:none;
  }
  .nav-links.is-open{display:flex}
  .nav-link{padding:12px 14px}
  .hero__grid{grid-template-columns:1fr}
  .intro-grid{grid-template-columns:1fr;gap:var(--s6)}
  .split{grid-template-columns:1fr;gap:var(--s6)}
  .overview{position:static}
  .status-strip{grid-template-columns:1fr 1fr}
  .status-cell:nth-child(3)::before{display:none}
  .risk-grid{grid-template-columns:1fr;gap:var(--s4)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:var(--s6)}
  .cta-band__inner{grid-template-columns:1fr;gap:var(--s5)}
}
@media (max-width:768px){
  .cmp-grid{grid-template-columns:1fr}
  .step-track{padding-left:0}
  .step-track::before{display:none}
  .step-item__marker{position:static;margin-bottom:12px;box-shadow:0 0 20px rgba(75,225,208,.16)}
  .cta-band{padding:40px var(--s5)}
  .hero{padding:36px 0 60px}
}
@media (max-width:520px){
  .container{padding:0 var(--s4)}
  .brand__text em{display:none}
  .nav-card{padding:10px 14px;gap:var(--s3)}
  .status-strip{grid-template-columns:1fr}
  .status-cell + .status-cell::before{left:16px;right:16px;top:0;bottom:auto;width:auto;height:1px;background:linear-gradient(90deg,transparent,rgba(75,225,208,.3),transparent)}
  .status-cell:nth-child(3)::before{display:block}
  .footer-grid{grid-template-columns:1fr}
  .hero__actions .btn{width:100%}
  .overview{padding:var(--s5)}
  .step-item__body{padding:20px}
  .faq-q{padding:16px 18px;font-size:15px}
  .faq-a p{padding:0 18px 18px 42px}
}