/* roulang page: index */
/* ===================== 设计变量 ===================== */
:root{
  --bg-deep:#060E12;
  --bg-panel:#0A161C;
  --bg-raise:#0E2028;
  --brand:#2ED3C0;
  --brand-deep:#21B7A6;
  --brand-soft:rgba(46,211,192,.12);
  --amber:#FFA24B;
  --text:#EAF6F7;
  --text-2:#A9C0C6;
  --text-3:#6E8890;
  --glass:rgba(255,255,255,.045);
  --line:rgba(126,214,222,.16);
  --line-soft:rgba(126,214,222,.09);
  --r-s:10px;
  --r-c:16px;
  --r-l:18px;
  --r-p:999px;
  --sh:0 18px 48px rgba(0,0,0,.45);
  --sh-sm:0 8px 24px rgba(0,0,0,.35);
  --inset:inset 0 1px 0 rgba(255,255,255,.06);
  --ease:cubic-bezier(.2,.7,.3,1);
  --ticker-h:44px;
  --nav-h:64px;
  --font:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Courier New",monospace;
  --f12:12px;--f13:13px;--f14:14px;--f16:16px;--f18:18px;--f22:22px;--f28:28px;--f36:36px;--f48:48px;
}

/* ===================== 基础重置 ===================== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:130px}
body{
  margin:0;
  background:var(--bg-deep);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5{margin:0;font-weight:700;line-height:1.3;color:var(--text);letter-spacing:.01em}
h1{font-size:var(--f48)}
h2{font-size:var(--f36)}
h3{font-size:var(--f22)}
h4{font-size:var(--f18)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease),opacity .2s var(--ease)}
a:hover{color:var(--brand-deep)}
img{max-width:100%;display:block;border:0}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
::selection{background:rgba(46,211,192,.28);color:#fff}
.num,.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* ===================== 容器与板块 ===================== */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--tight{padding:72px 0}
.section--panel{background:var(--bg-panel)}
.section__head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px}
.section__eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:var(--f13);letter-spacing:.14em;color:var(--brand);
  text-transform:none;margin-bottom:12px;font-weight:500;
}
.section__eyebrow::before{content:"";width:22px;height:1px;background:var(--brand);opacity:.7}
.section__title{font-size:var(--f36)}
.section__desc{margin-top:12px;color:var(--text-2);font-size:var(--f16);max-width:620px}
.section__more{
  flex:none;font-size:var(--f14);color:var(--text-2);
  display:inline-flex;align-items:center;gap:6px;
  padding-bottom:4px;border-bottom:1px solid var(--line);
}
.section__more:hover{color:var(--brand);border-color:var(--brand)}

/* ===================== 按钮 ===================== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-s);
  font-size:var(--f16);font-weight:600;line-height:1;
  border:1px solid transparent;white-space:nowrap;
  transition:transform .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn:active{transform:scale(.985)}
.btn--glow{
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-deep) 100%);
  color:#04141A;border-radius:var(--r-p);
  box-shadow:0 0 24px rgba(46,211,192,.45);
}
.btn--glow:hover{
  color:#04141A;
  filter:brightness(1.08);
  box-shadow:0 0 34px rgba(46,211,192,.62);
}
.btn--ghost{
  background:var(--glass);color:var(--text);
  border-color:var(--line);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
}
.btn--ghost:hover{border-color:var(--brand);color:var(--brand);background:rgba(46,211,192,.08)}
.btn--sm{height:40px;padding:0 20px;font-size:var(--f14)}
.btn--block{width:100%}

/* ===================== 徽章 / 标签 ===================== */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;border-radius:var(--r-p);
  font-size:var(--f12);font-weight:500;line-height:1;letter-spacing:.02em;
  border:1px solid transparent;white-space:nowrap;
}
.badge--brand{background:var(--brand-soft);color:var(--brand);border-color:rgba(46,211,192,.32)}
.badge--amber{background:rgba(255,162,75,.12);color:var(--amber);border-color:rgba(255,162,75,.42)}
.badge--mute{background:rgba(255,255,255,.05);color:var(--text-2);border-color:var(--line-soft)}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--r-p);font-size:var(--f12);color:var(--text-2);
  background:rgba(255,255,255,.04);border:1px solid var(--line-soft);
}

/* ===================== 顶部倒计时条 ===================== */
.ticker{
  position:sticky;top:0;z-index:60;height:var(--ticker-h);
  background:linear-gradient(90deg,rgba(10,22,28,.96),rgba(6,14,18,.96));
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line-soft);
}
.ticker__inner{
  max-width:1200px;height:100%;margin:0 auto;padding:0 24px;
  display:flex;align-items:center;gap:16px;
}
.ticker__link{
  margin-left:auto;font-size:var(--f13);color:var(--text-2);
  display:inline-flex;align-items:center;gap:6px;
}
.ticker__link::after{content:"›";font-size:var(--f16);line-height:1;color:var(--brand)}
.ticker__link:hover{color:var(--brand)}
.countdown{display:flex;align-items:center;gap:6px}
.cd-unit{display:flex;align-items:baseline;gap:3px}
.cd-unit b{
  font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:var(--f16);color:var(--amber);font-weight:700;letter-spacing:.02em;
}
.cd-unit span{font-size:var(--f12);color:var(--text-3)}
.cd-sep{color:var(--text-3);font-size:var(--f13);padding:0 1px}

/* ===================== 导航 ===================== */
.site-nav{
  position:sticky;top:var(--ticker-h);z-index:55;
  background:rgba(6,14,18,.72);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line-soft);
  transition:background .24s var(--ease),box-shadow .24s var(--ease);
}
.site-nav.is-scrolled{background:rgba(6,14,18,.94);box-shadow:0 10px 30px rgba(0,0,0,.4)}
.nav__grid{
  height:var(--nav-h);display:flex;align-items:center;gap:20px;
  transition:height .24s var(--ease);
}
.site-nav.is-scrolled .nav__grid{height:56px}
.nav__left{display:flex;align-items:center;gap:34px;min-width:0}
.nav__right{display:flex;align-items:center;gap:12px;margin-left:auto}

.logo{display:inline-flex;align-items:center;gap:10px;flex:none}
.logo__mark{
  width:36px;height:36px;border-radius:11px;flex:none;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-deep) 100%);
  color:#04141A;font-weight:800;font-size:var(--f18);
  box-shadow:0 0 18px rgba(46,211,192,.35);
}
.logo__text{display:flex;flex-direction:column;line-height:1.15}
.logo__text b{font-size:var(--f16);color:var(--text);font-weight:700;letter-spacing:.02em}
.logo__text i{font-style:normal;font-size:12px;color:var(--text-3);letter-spacing:.06em}

.nav__channels{display:flex;align-items:center;gap:26px}
.nav__channels a{
  position:relative;font-size:var(--f14);color:var(--text-2);
  padding:6px 0;white-space:nowrap;
}
.nav__channels a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  border-radius:2px;background:var(--brand);opacity:0;transform:scaleX(.4);
  transition:opacity .2s var(--ease),transform .2s var(--ease);
}
.nav__channels a:hover{color:var(--text)}
.nav__channels a:hover::after{opacity:.5;transform:scaleX(1)}
.nav__channels a.is-active{color:var(--text);font-weight:600}
.nav__channels a.is-active::after{opacity:1;transform:scaleX(1)}
.icon-btn{
  width:40px;height:40px;border-radius:var(--r-s);flex:none;
  display:flex;align-items:center;justify-content:center;
  background:var(--glass);border:1px solid var(--line);color:var(--text-2);
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.icon-btn:hover{color:var(--brand);border-color:var(--brand);background:rgba(46,211,192,.08)}
.nav__toggle{display:none}

/* ===================== Hero ===================== */
.hero{
  position:relative;overflow:hidden;
  padding:48px 0 88px;
  background:
    radial-gradient(880px 460px at 78% -6%,rgba(46,211,192,.14),transparent 62%),
    radial-gradient(640px 380px at 4% 92%,rgba(255,162,75,.07),transparent 65%),
    var(--bg-deep);
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(126,214,222,.035) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(126,214,222,.035) 1px,transparent 1px);
  background-size:24px 24px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 88%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 88%);
}
.hero__grid{
  position:relative;display:grid;grid-template-columns:58% 42%;
  gap:48px;align-items:center;min-height:640px;
}
.hero__copy{max-width:600px}
.hero h1{
  font-size:50px;line-height:1.18;margin:18px 0 18px;letter-spacing:.005em;
}
.hero h1 em{
  font-style:normal;color:var(--brand);
  background:linear-gradient(180deg,transparent 62%,rgba(46,211,192,.18) 62%);
}
.hero__sub{font-size:var(--f18);color:var(--text-2);line-height:1.85;max-width:520px}
.hero__cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero__stats{
  display:flex;gap:40px;margin-top:44px;padding-top:28px;
  border-top:1px solid var(--line-soft);
}
.stat b{
  display:block;font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:var(--f28);font-weight:700;color:var(--brand);line-height:1.2;
}
.stat span{display:block;font-size:var(--f13);color:var(--text-3);margin-top:4px}

.hero__visual{position:relative;border-radius:30px;overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--sh);aspect-ratio:1/0.92;background:var(--bg-raise)}
.hero__visual img{width:100%;height:100%;object-fit:cover}
.hero__visual::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,14,18,.08) 0%,rgba(6,14,18,.42) 52%,rgba(6,14,18,.9) 100%);
}
.hero__phone{
  position:absolute;inset:auto 24px 24px 24px;height:78%;
  border-radius:26px;border:1px solid rgba(234,246,247,.22);
  pointer-events:none;z-index:2;
}
.float-card{
  position:absolute;left:24px;right:24px;bottom:24px;z-index:3;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px 18px;border-radius:var(--r-c);
  background:rgba(10,22,28,.66);border:1px solid var(--line);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  box-shadow:var(--inset);
}
.float-card small{display:block;font-size:var(--f12);color:var(--text-3);letter-spacing:.04em}
.float-card strong{display:block;font-size:var(--f16);color:var(--text);font-weight:600;margin-top:2px}
.float-card .val{
  font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:var(--f22);font-weight:700;color:var(--amber);line-height:1;
}

/* ===================== Bento 卖点 ===================== */
.bento{display:grid;grid-template-columns:repeat(3,1fr);grid-auto-rows:minmax(150px,auto);gap:20px}
.bento__main{
  grid-column:1/3;grid-row:1/3;position:relative;overflow:hidden;
  border-radius:var(--r-l);border:1px solid var(--line);
  background:linear-gradient(150deg,rgba(14,32,40,.95) 0%,rgba(10,22,28,.9) 60%,rgba(6,14,18,.95) 100%);
  padding:38px;display:flex;flex-direction:column;justify-content:space-between;
  box-shadow:var(--sh);
}
.bento__main::after{
  content:"";position:absolute;top:0;right:0;width:88px;height:88px;
  background:linear-gradient(225deg,rgba(46,211,192,.32),rgba(46,211,192,0) 72%);
  clip-path:polygon(100% 0,0 0,100% 100%);
}
.bento__figure{
  position:absolute;right:0;bottom:0;width:46%;height:72%;
  border-top-left-radius:80px;overflow:hidden;opacity:.9;
}
.bento__figure img{width:100%;height:100%;object-fit:cover}
.bento__figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,var(--bg-raise) 0%,rgba(10,22,28,.15) 46%,rgba(10,22,28,.4) 100%);
}
.bento__big{
  font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:64px;font-weight:700;color:var(--brand);line-height:1;letter-spacing:-.02em;
}
.bento__main h3{font-size:var(--f28);margin:16px 0 12px;max-width:60%}
.bento__main p{color:var(--text-2);max-width:58%;font-size:var(--f16)}
.bento__main .badge{align-self:flex-start}
.bento__side{
  border-radius:var(--r-l);border:1px solid var(--line);
  background:var(--glass);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  padding:26px;display:flex;flex-direction:column;gap:10px;
  box-shadow:var(--inset);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.bento__side:hover{transform:translateY(-4px);border-color:var(--brand);box-shadow:var(--sh-sm),var(--inset)}
.bento__ico{
  width:42px;height:42px;border-radius:12px;flex:none;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);border:1px solid rgba(46,211,192,.28);
  color:var(--brand);font-size:var(--f18);font-weight:700;
}
.bento__side h4{font-size:var(--f18)}
.bento__side p{font-size:var(--f14);color:var(--text-2);line-height:1.8}

/* ===================== 亮点图墙 ===================== */
.wall{
  display:grid;grid-template-columns:repeat(9,1fr);
  grid-auto-rows:80px;gap:16px;
}
.wall__item{
  position:relative;overflow:hidden;border-radius:var(--r-c);
  border:1px solid var(--line-soft);background:var(--bg-raise);
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.wall__item img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease),filter .3s var(--ease)}
.wall__item:hover{border-color:var(--brand);box-shadow:0 0 0 1px rgba(46,211,192,.35),var(--sh-sm)}
.wall__item:hover img{transform:scale(1.03)}
.wall__item::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,14,18,.05) 30%,rgba(6,14,18,.85) 100%);
}
.wall__no{
  position:absolute;top:12px;left:12px;z-index:2;
  min-width:28px;height:24px;padding:0 8px;border-radius:var(--r-p);
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(46,211,192,.9);color:#04141A;
  font-family:var(--mono);font-size:var(--f12);font-weight:700;
  transform:translateY(-4px);opacity:0;transition:opacity .22s var(--ease),transform .22s var(--ease);
}
.wall__item:hover .wall__no{opacity:1;transform:translateY(0)}
.wall__cap{
  position:absolute;left:18px;right:18px;bottom:14px;z-index:2;
  font-size:var(--f14);font-weight:600;color:var(--text);
}
.wall__cap small{display:block;font-size:var(--f12);font-weight:400;color:var(--text-3);margin-top:2px}
.wall__item--a{grid-column:1/4;grid-row:1/4}
.wall__item--b{grid-column:4/7;grid-row:1/3}
.wall__item--c{grid-column:7/10;grid-row:1/4}
.wall__item--d{grid-column:1/4;grid-row:4/6}
.wall__item--e{grid-column:4/7;grid-row:3/6}
.wall__item--f{grid-column:7/10;grid-row:4/6}

/* ===================== 报名 CTA ===================== */
.signup{
  position:relative;overflow:hidden;
  padding:88px 0;background:var(--bg-panel);
  border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);
}
.signup::before{
  content:"";position:absolute;top:-160px;right:-120px;width:520px;height:520px;
  background:radial-gradient(circle,rgba(46,211,192,.14),transparent 66%);
  pointer-events:none;
}
.signup__grid{position:relative;display:grid;grid-template-columns:1fr 420px;gap:56px;align-items:start}
.steps{margin-top:34px;display:flex;flex-direction:column;gap:22px}
.step{display:flex;gap:18px;align-items:flex-start}
.step__no{
  flex:none;width:40px;height:40px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-weight:700;font-size:var(--f16);
  color:var(--brand);background:var(--brand-soft);border:1px solid rgba(46,211,192,.3);
}
.step h4{font-size:var(--f18);margin-bottom:4px}
.step p{font-size:var(--f14);color:var(--text-2)}
.signup__aside{display:flex;flex-direction:column;gap:14px}
.signup__form{
  border-radius:var(--r-l);border:1px solid var(--line);
  background:rgba(14,32,40,.62);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  box-shadow:var(--sh),var(--inset);padding:30px;
}
.signup__form h3{font-size:var(--f22);margin-bottom:6px}
.signup__form > p.form__lead{font-size:var(--f14);color:var(--text-3);margin-bottom:22px}
.field{display:block;margin-bottom:16px}
.field > span{display:block;font-size:var(--f13);color:var(--text-2);margin-bottom:8px}
.field input{
  width:100%;height:48px;padding:0 14px;border-radius:var(--r-s);
  background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--text);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.field input::placeholder{color:var(--text-3)}
.field input:focus{
  outline:none;border-color:var(--brand);background:rgba(46,211,192,.07);
  box-shadow:0 0 0 3px rgba(46,211,192,.14);
}
.field__row{display:flex;gap:10px}
.field__row input{flex:1;min-width:0}
.btn--code{flex:none;height:48px;padding:0 18px;font-size:var(--f14)}
.check{display:flex;gap:10px;align-items:flex-start;margin:6px 0 20px;cursor:pointer}
.check input{
  width:18px;height:18px;margin-top:5px;flex:none;accent-color:var(--brand);
  border-radius:5px;
}
.check span{font-size:var(--f13);color:var(--text-2);line-height:1.7}
.form__hint{margin-top:14px;font-size:var(--f12);color:var(--text-3);line-height:1.7;text-align:center}
.signup__tips{
  border-radius:var(--r-c);border:1px solid var(--line-soft);
  background:var(--glass);padding:18px 20px;font-size:var(--f13);color:var(--text-2);
  display:flex;gap:12px;align-items:flex-start;
}
.signup__tips b{color:var(--amber);font-weight:600;flex:none}

/* ===================== 最新信息 ===================== */
.news__grid{margin-top:-10px}
.news-card{
  display:flex;flex-direction:column;height:100%;
  border-radius:var(--r-c);overflow:hidden;
  background:var(--bg-raise);border:1px solid var(--line-soft);
  box-shadow:var(--inset);color:var(--text);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.news-card:hover{transform:translateY(-4px);border-color:var(--brand);box-shadow:var(--sh-sm),var(--inset);color:var(--text)}
.news-card__cover{aspect-ratio:16/9;overflow:hidden;background:var(--bg-panel)}
.news-card__cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.news-card:hover .news-card__cover img{transform:scale(1.04)}
.news-card__body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;gap:12px}
.news-card__body h3{
  font-size:var(--f18);line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card__body p{
  font-size:var(--f14);color:var(--text-2);line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card__meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line-soft);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:var(--f12);color:var(--text-3);
}
.news-card__meta em{font-style:normal;color:var(--brand)}
.news-empty{
  border-radius:var(--r-l);border:1px dashed var(--line);
  background:var(--glass);padding:48px 28px;text-align:center;
}
.news-empty .ico{
  width:52px;height:52px;margin:0 auto 16px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand);font-size:var(--f22);font-weight:700;
}
.news-empty p{color:var(--text-2);margin-bottom:16px}

/* ===================== FAQ ===================== */
.faq__grid{display:grid;grid-template-columns:340px 1fr;gap:56px;align-items:start}
.faq__aside{position:sticky;top:136px}
.faq__aside h2{font-size:var(--f28);margin-bottom:14px}
.faq__aside p{color:var(--text-2);font-size:var(--f14);margin-bottom:22px}
.faq__list{display:flex;flex-direction:column;gap:12px}
.faq__item{
  border-radius:var(--r-c);border:1px solid var(--line-soft);
  background:var(--glass);overflow:hidden;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.faq__item[open]{border-color:var(--line);background:rgba(14,32,40,.6)}
.faq__item summary{
  list-style:none;cursor:pointer;min-height:56px;
  padding:16px 22px;display:flex;align-items:center;gap:14px;
  font-size:var(--f16);font-weight:600;color:var(--text);
}
.faq__item summary::-webkit-details-marker{display:none}
.faq__item summary::after{
  content:"+";margin-left:auto;flex:none;
  width:24px;height:24px;border-radius:8px;
  display:flex;align-items:center;justify-content:center;
  font-size:var(--f16);font-weight:500;color:var(--brand);
  background:var(--brand-soft);border:1px solid rgba(46,211,192,.28);
  transition:transform .2s var(--ease),background .2s var(--ease);
}
.faq__item[open] summary::after{content:"−";transform:rotate(90deg)}
.faq__answer{padding:0 22px 20px;color:var(--text-2);font-size:var(--f14);line-height:1.85}
.faq__answer ol{padding-left:0;counter-reset:faq;display:flex;flex-direction:column;gap:8px}
.faq__answer ol li{position:relative;padding-left:24px;counter-increment:faq}
.faq__answer ol li::before{
  content:counter(faq);position:absolute;left:0;top:5px;
  width:16px;height:16px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:10px;font-family:var(--mono);color:var(--brand);
  border:1px solid rgba(46,211,192,.4);
}

/* ===================== 页脚 ===================== */
.site-footer{
  background:#04090C;border-top:1px solid var(--line-soft);
  padding:72px 0 28px;
}
.footer__grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer__brand p{margin-top:18px;font-size:var(--f14);color:var(--text-2);max-width:330px;line-height:1.85}
.logo--footer .logo__mark{width:34px;height:34px;font-size:var(--f16)}
.footer__col h4{font-size:var(--f14);color:var(--text);margin-bottom:16px;letter-spacing:.04em}
.footer__col li{margin-bottom:10px}
.footer__col a{font-size:var(--f14);color:var(--text-2)}
.footer__col a:hover{color:var(--brand)}
.footer__bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line-soft);
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  font-size:var(--f12);color:var(--text-3);
}

/* ===================== 响应式 ===================== */
@media screen and (max-width:1199px){
  .hero__grid{grid-template-columns:56% 44%;gap:36px}
  .hero h1{font-size:42px}
  .bento__main h3,.bento__main p{max-width:70%}
  .signup__grid{grid-template-columns:1fr 380px;gap:40px}
}
@media screen and (max-width:1023px){
  .container{padding:0 20px}
  .section{padding:72px 0}
  .section__head{margin-bottom:34px}
  .hero{padding:40px 0 72px}
  .hero__grid{grid-template-columns:1fr;gap:36px;min-height:560px}
  .hero__copy{max-width:100%}
  .hero h1{font-size:38px}
  .hero__visual{aspect-ratio:16/10;order:1}
  .hero__copy{order:2}
  .hero__phone{display:none}
  .bento{grid-template-columns:repeat(2,1fr)}
  .bento__main{grid-column:1/3;grid-row:auto}
  .bento__figure{position:relative;width:100%;height:200px;border-radius:14px;margin-top:22px}
  .bento__main h3,.bento__main p{max-width:100%}
  .wall{grid-template-columns:repeat(2,1fr);grid-auto-rows:180px}
  .wall__item--a,.wall__item--b,.wall__item--c,.wall__item--d,.wall__item--e,.wall__item--f{grid-column:auto;grid-row:auto}
  .signup__grid{grid-template-columns:1fr;gap:36px}
  .signup__aside{max-width:520px}
  .faq__grid{grid-template-columns:1fr;gap:28px}
  .faq__aside{position:static}
  .footer__grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media screen and (max-width:767px){
  :root{--ticker-h:40px;--nav-h:60px}
  body{font-size:16px}
  .container{padding:0 16px}
  .section{padding:56px 0}
  .section__title{font-size:var(--f28)}
  .section__head{flex-direction:column;align-items:flex-start;gap:14px}
  .nav__left{gap:14px}
  .nav__channels{display:none}
  .nav__toggle{
    display:flex;align-items:center;justify-content:center;
    width:40px;height:40px;border-radius:var(--r-s);margin-left:auto;
    background:var(--glass);border:1px solid var(--line);color:var(--text-2);
  }
  .nav__right .icon-btn{display:none}
  .nav__right{margin-left:0}
  .nav__right .btn{height:38px;padding:0 16px;font-size:var(--f13)}
  .nav--open .nav__channels{
    display:flex;flex-direction:column;align-items:flex-start;gap:4px;
    position:absolute;left:0;right:0;top:100%;
    padding:14px 16px 18px;
    background:rgba(6,14,18,.98);border-bottom:1px solid var(--line);
    box-shadow:0 18px 40px rgba(0,0,0,.5);
  }
  .nav--open .nav__channels a{padding:10px 0;font-size:var(--f16)}
  .nav--open .nav__channels a::after{display:none}
  .ticker__inner{padding:0 16px;gap:10px}
  .ticker__link span{display:none}
  .cd-unit b{font-size:var(--f14)}
  .hero{padding:32px 0 56px}
  .hero h1{font-size:31px}
  .hero__sub{font-size:var(--f16)}
  .hero__cta .btn{width:100%}
  .hero__stats{gap:0;justify-content:space-between;margin-top:32px}
  .stat b{font-size:var(--f22)}
  .stat span{font-size:var(--f12)}
  .float-card{left:14px;right:14px;bottom:14px;padding:12px 14px;flex-wrap:wrap}
  .bento{grid-template-columns:1fr;gap:16px}
  .bento__main{padding:26px}
  .bento__big{font-size:48px}
  .bento__main h3{font-size:var(--f22)}
  .wall{grid-template-columns:1fr;grid-auto-rows:200px;gap:14px}
  .signup{padding:56px 0}
  .signup__form{padding:22px}
  .signup__aside{max-width:100%}
  .field__row{flex-direction:column}
  .btn--code{width:100%}
  .btn{min-height:48px}
  .footer__grid{grid-template-columns:1fr;gap:32px}
  .site-footer{padding:56px 0 24px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: article */
:root{
  --bg:#060E12;
  --bg-panel:#0A161C;
  --bg-raise:#0E2028;
  --brand:#2ED3C0;
  --brand-deep:#21B7A6;
  --amber:#FFA24B;
  --text:#EAF6F7;
  --text-2:#A9C0C6;
  --text-3:#6E8890;
  --line:rgba(126,214,222,.16);
  --line-strong:rgba(126,214,222,.32);
  --glass:rgba(255,255,255,.045);
  --glass-2:rgba(255,255,255,.07);
  --r-sm:10px;
  --r-md:14px;
  --r-lg:18px;
  --r-pill:999px;
  --shadow:0 18px 48px rgba(0,0,0,.45);
  --shadow-soft:0 10px 28px rgba(0,0,0,.32);
  --inset:inset 0 1px 0 rgba(255,255,255,.06);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:#5CE6D6}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;letter-spacing:.005em}
p{margin:0}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 导航 ---------- */
.site-nav{
  position:sticky;top:0;z-index:60;
  background:rgba(6,14,18,.82);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
  transition:background .22s var(--ease),border-color .22s var(--ease);
}
.nav__grid{display:flex;align-items:center;justify-content:space-between;gap:20px;height:64px}
.nav__left{display:flex;align-items:center;gap:34px;min-width:0}
.nav__right{display:flex;align-items:center;gap:12px}
.logo{display:flex;align-items:center;gap:10px;color:var(--text)}
.logo:hover{color:var(--text)}
.logo__mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:11px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--brand),var(--brand-deep));
  color:#04141A;font-weight:800;font-size:18px;
  box-shadow:0 0 20px rgba(46,211,192,.35);
}
.logo__text{display:flex;flex-direction:column;line-height:1.18}
.logo__text b{font-size:15px;font-weight:700;letter-spacing:.02em}
.logo__text i{font-style:normal;font-size:11.5px;color:var(--text-3);letter-spacing:.06em}
.nav__channels{display:flex;align-items:center;gap:26px}
.nav__channels a{
  position:relative;color:var(--text-2);font-size:14.5px;padding:6px 0;white-space:nowrap;
}
.nav__channels a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),rgba(46,211,192,0));
  transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease);
}
.nav__channels a:hover{color:var(--text)}
.nav__channels a:hover::after,.nav__channels a.is-active::after{transform:scaleX(1)}
.nav__channels a.is-active{color:var(--brand)}
.icon-btn{
  width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  background:var(--glass);border:1px solid var(--line);color:var(--text-2);cursor:pointer;
  transition:all .2s var(--ease);
}
.icon-btn:hover{color:var(--brand);border-color:var(--line-strong)}
.icon-btn:active{transform:scale(.985)}
.nav__toggle{display:none;width:38px;height:38px;border-radius:10px;background:var(--glass);
  border:1px solid var(--line);color:var(--text-2);align-items:center;justify-content:center;cursor:pointer}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-sm);border:1px solid transparent;cursor:pointer;
  font-size:15px;font-weight:600;padding:0 22px;height:46px;
  transition:all .2s var(--ease);
}
.btn:active{transform:scale(.985)}
.btn--glow{
  background:linear-gradient(120deg,var(--brand),var(--brand-deep));
  color:#04141A;box-shadow:0 0 24px rgba(46,211,192,.45);
}
.btn--glow:hover{color:#04141A;filter:brightness(1.08);box-shadow:0 0 34px rgba(46,211,192,.6)}
.btn--sm{height:38px;padding:0 16px;font-size:14px;border-radius:9px}
.btn--ghost{
  background:var(--glass);border-color:var(--line);color:var(--text);
  backdrop-filter:blur(12px);
}
.btn--ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn--block{width:100%}

/* ---------- 文章头部 ---------- */
.article-hero{
  position:relative;
  padding:52px 0 40px;
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(760px 320px at 12% -30%, rgba(46,211,192,.14), transparent 68%),
    linear-gradient(180deg,rgba(10,22,28,.9),rgba(6,14,18,1));
  overflow:hidden;
}
.article-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(126,214,222,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(126,214,222,.05) 1px,transparent 1px);
  background-size:24px 24px;opacity:.5;
  mask-image:radial-gradient(600px 260px at 20% 10%,#000,transparent 78%);
  -webkit-mask-image:radial-gradient(600px 260px at 20% 10%,#000,transparent 78%);
}
.article-hero .container{position:relative;z-index:1}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:20px}
.crumb a{color:var(--text-3)}
.crumb a:hover{color:var(--brand)}
.crumb span.sep{color:rgba(110,136,144,.6)}
.crumb .current{color:var(--text-2);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:500;letter-spacing:.02em;
}
.badge--brand{background:rgba(46,211,192,.12);border:1px solid rgba(46,211,192,.34);color:var(--brand)}
.badge--amber{background:rgba(255,162,75,.1);border:1px solid rgba(255,162,75,.34);color:var(--amber)}
.badge--muted{background:var(--glass);border:1px solid var(--line);color:var(--text-2)}
.article-hero h1{
  margin:16px 0 0;font-size:36px;line-height:1.28;max-width:900px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  margin-top:22px;font-size:13.5px;color:var(--text-3);
}
.article-meta i{font-style:normal;color:var(--text-2)}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:rgba(110,136,144,.5)}

/* ---------- 正文布局 ---------- */
.article-main{padding:56px 0 88px}
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;align-items:start;
}
.article-col{max-width:760px;min-width:0}
.lead{
  position:relative;margin-bottom:34px;padding:4px 0 4px 18px;
  border-left:3px solid var(--brand);
  color:var(--text-2);font-size:16.5px;line-height:1.9;
}
.article-body{font-size:16.5px;line-height:1.9;color:#DCEBED}
.article-body p{margin:0 0 1.1em}
.article-body h2{
  position:relative;margin:44px 0 18px;padding-left:16px;font-size:24px;color:var(--text);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:4px;
  background:linear-gradient(180deg,var(--brand),rgba(46,211,192,.25));
}
.article-body h3{margin:32px 0 12px;font-size:18.5px;font-weight:600;color:#CDE7E9}
.article-body ul,.article-body ol{margin:0 0 1.1em;padding-left:2px}
.article-body li{position:relative;padding-left:20px;margin-bottom:10px;color:#D3E5E7}
.article-body ul>li::before{
  content:"";position:absolute;left:2px;top:12px;width:6px;height:6px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 10px rgba(46,211,192,.6);
}
.article-body ol{counter-reset:li}
.article-body ol>li::before{
  counter-increment:li;content:counter(li);
  position:absolute;left:0;top:3px;color:var(--amber);font-family:var(--mono);font-size:13px;font-weight:700;
}
.article-body blockquote{
  margin:24px 0;padding:18px 22px;border-radius:var(--r-md);
  background:var(--glass);border:1px solid var(--line);border-left:3px solid var(--brand);
  color:var(--text-2);
}
.article-body img{border-radius:var(--r-md);margin:22px 0;border:1px solid var(--line)}
.article-body figure{margin:24px 0}
.article-body figcaption{margin-top:8px;font-size:13px;color:var(--text-3);text-align:center}
.article-body a{border-bottom:1px solid rgba(46,211,192,.4)}
.article-body table{
  width:100%;border-collapse:separate;border-spacing:0;margin:22px 0;font-size:14.5px;
  background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
}
.article-body th{
  text-align:left;padding:12px 16px;font-weight:600;color:var(--text);
  background:rgba(46,211,192,.08);border-bottom:1px solid var(--line);
}
.article-body td{padding:12px 16px;border-bottom:1px solid rgba(126,214,222,.09);color:var(--text-2)}
.article-body tr:last-child td{border-bottom:none}
.article-body tr:nth-child(even) td{background:rgba(255,255,255,.018)}
.article-body pre,.article-body .data-panel{
  margin:22px 0;padding:18px 20px;border-radius:var(--r-md);
  background:#071319;border:1px solid rgba(126,214,222,.22);
  color:var(--brand);font-family:var(--mono);font-size:14px;line-height:1.8;
  font-variant-numeric:tabular-nums;overflow-x:auto;
}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}

/* ---------- 侧栏 ---------- */
.side{position:sticky;top:88px;display:grid;gap:20px}
.side-card{
  background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:20px;box-shadow:var(--shadow-soft),var(--inset);
}
.side-card h4{
  font-size:14px;letter-spacing:.05em;color:var(--text-2);font-weight:600;
  display:flex;align-items:center;gap:8px;margin-bottom:14px;
}
.side-card h4::before{content:"";width:3px;height:14px;border-radius:3px;background:var(--brand)}
.toc a{
  display:block;padding:8px 10px;border-radius:8px;font-size:14px;color:var(--text-2);
  border-left:2px solid transparent;
}
.toc a:hover{background:var(--glass);color:var(--brand);border-left-color:var(--brand)}
.side-rec{display:grid;gap:14px}
.side-rec a{display:grid;grid-template-columns:64px 1fr;gap:12px;align-items:center;color:var(--text)}
.rec-thumb{
  aspect-ratio:16/9;border-radius:8px;overflow:hidden;background:var(--bg-raise);
}
.rec-thumb img{width:100%;height:100%;object-fit:cover}
.side-rec strong{font-size:13.8px;font-weight:600;line-height:1.5;display:block;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.side-rec span{font-size:12px;color:var(--text-3)}
.side-rec a:hover strong{color:var(--brand)}

/* ---------- 文末 ---------- */
.article-foot{max-width:760px;margin-top:48px;padding-top:32px;border-top:1px solid var(--line)}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px}
.share-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:34px;
  padding:16px 18px;border-radius:var(--r-md);background:var(--glass);border:1px solid var(--line);
}
.share-row span{font-size:13.5px;color:var(--text-3)}
.chip{
  display:inline-flex;align-items:center;height:34px;padding:0 14px;border-radius:var(--r-pill);
  font-size:13.5px;color:var(--text-2);background:var(--bg-raise);border:1px solid var(--line);
  transition:all .2s var(--ease);
}
.chip:hover{color:var(--brand);border-color:var(--line-strong)}
.sec-title{font-size:20px;margin-bottom:20px;display:flex;align-items:center;gap:10px}
.sec-title::before{content:"";width:4px;height:18px;border-radius:4px;background:var(--brand)}
.rec-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.rec-card{
  display:block;background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;color:var(--text);box-shadow:var(--shadow-soft),var(--inset);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.rec-card:hover{transform:translateY(-4px);border-color:var(--line-strong);color:var(--text);box-shadow:var(--shadow)}
.rec-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--bg-raise)}
.rec-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.rec-card:hover .thumb img{transform:scale(1.04)}
.rec-card .body{padding:14px 16px 18px}
.rec-card h5{
  margin:0 0 8px;font-size:15px;font-weight:600;line-height:1.55;color:var(--text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rec-card time{font-size:12.5px;color:var(--text-3)}
.back-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}

/* ---------- 空态 ---------- */
.empty-state{
  max-width:760px;padding:40px 28px;text-align:center;border-radius:var(--r-lg);
  background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(14px);
}
.empty-state .ico{
  width:56px;height:56px;margin:0 auto 16px;border-radius:16px;display:flex;align-items:center;justify-content:center;
  background:rgba(46,211,192,.1);border:1px solid rgba(46,211,192,.3);color:var(--brand);
}
.empty-state p{color:var(--text-2);margin-bottom:18px}

/* ---------- CTA 条 ---------- */
.cta-bar{
  margin-top:64px;border-radius:var(--r-lg);padding:30px 32px;
  background:linear-gradient(120deg,rgba(46,211,192,.12),rgba(255,162,75,.06)),var(--bg-panel);
  border:1px solid var(--line);box-shadow:var(--shadow-soft),var(--inset);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
}
.cta-bar h3{font-size:19px;margin-bottom:6px}
.cta-bar p{font-size:14px;color:var(--text-2)}
.cta-bar .actions{display:flex;flex-wrap:wrap;align-items:center;gap:16px}

/* ---------- 页脚 ---------- */
.site-footer{
  background:#050B0E;border-top:1px solid var(--line);padding:64px 0 26px;margin-top:0;
}
.footer__grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer__brand p{margin-top:16px;font-size:14px;color:var(--text-3);line-height:1.85;max-width:340px}
.logo--footer{margin-bottom:2px}
.footer__col h4{font-size:14.5px;color:var(--text);margin-bottom:16px;font-weight:600}
.footer__col ul{display:grid;gap:11px}
.footer__col a{font-size:14px;color:var(--text-3)}
.footer__col a:hover{color:var(--brand)}
.footer__bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(126,214,222,.1);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr) 268px;gap:40px}
  .article-hero h1{font-size:32px}
}
@media (max-width:1023px){
  .nav__channels{
    display:none;
  }
  .site-nav.is-open .nav__channels{
    display:flex;flex-direction:column;align-items:flex-start;gap:4px;
    position:absolute;left:0;right:0;top:100%;
    background:rgba(8,18,23,.98);backdrop-filter:blur(20px);
    border-bottom:1px solid var(--line);padding:14px 24px 20px;
  }
  .site-nav.is-open .nav__channels a{width:100%;padding:12px 0;font-size:15px;border-bottom:1px solid rgba(126,214,222,.08)}
  .site-nav.is-open .nav__channels a::after{display:none}
  .nav__toggle{display:flex}
  .article-layout{grid-template-columns:minmax(0,1fr)}
  .side{position:static;order:2}
  .article-col{max-width:none}
  .article-body{font-size:16px}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .nav__grid{height:58px}
  .nav__left{gap:18px}
  .logo__text i{font-size:10.5px}
  .nav__right .btn--glow{display:none}
  .article-hero{padding:34px 0 28px}
  .article-hero h1{font-size:25px}
  .article-main{padding:38px 0 60px}
  .article-body h2{font-size:20.5px;margin:34px 0 14px}
  .article-body h3{font-size:17px}
  .lead{font-size:15.5px}
  .rec-grid{grid-template-columns:1fr}
  .cta-bar{padding:24px 20px}
  .cta-bar .actions{width:100%}
  .cta-bar .actions .btn{width:100%}
  .footer__grid{grid-template-columns:1fr;gap:28px}
  .footer__bottom{flex-direction:column}
}
@media (max-width:559px){
  .article-hero h1{font-size:22px}
  .article-meta{gap:8px 14px;font-size:13px}
  .btn{height:48px}
  .crumb .current{max-width:220px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
}

/* roulang page: category1 */
:root{
  --bg:#060E12;
  --panel:#0A161C;
  --raise:#0E2028;
  --deep:#07141A;
  --brand:#2ED3C0;
  --brand-2:#21B7A6;
  --amber:#FFA24B;
  --text:#EAF6F7;
  --text-2:#A9C0C6;
  --text-3:#6E8890;
  --glass:rgba(255,255,255,.045);
  --line:rgba(126,214,222,.16);
  --line-2:rgba(126,214,222,.32);
  --r-s:10px;
  --r-m:14px;
  --r-l:18px;
  --r-pill:999px;
  --sh:0 18px 48px rgba(0,0,0,.45);
  --sh-card:0 18px 48px rgba(0,0,0,.45),inset 0 1px 0 rgba(255,255,255,.06);
  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-h:64px;
  --container:1200px;
}

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

html{scroll-behavior:smooth;}

body{
  margin:0;
  padding:0;
  background-color:var(--bg);
  color:var(--text);
  font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
  background-image:
    radial-gradient(1100px 620px at 12% -8%, rgba(46,211,192,.10), transparent 62%),
    radial-gradient(820px 520px at 96% 2%, rgba(255,162,75,.055), transparent 60%);
  background-repeat:no-repeat;
}

img{max-width:100%;display:block;border:0;}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);}
a:hover{color:#5FE6D6;}
p{margin:0 0 1.1em;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;letter-spacing:.01em;}
button,input{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
table{border-collapse:collapse;width:100%;}

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

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}

/* ---------- 顶部导航 ---------- */
.site-nav{
  position:sticky;
  top:0;
  z-index:80;
  height:var(--nav-h);
  display:flex;
  align-items:center;
  background:rgba(6,14,18,.72);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
  transition:height .2s var(--ease),background-color .2s var(--ease);
}
.site-nav.is-scrolled{
  height:56px;
  background:rgba(5,12,16,.9);
  box-shadow:0 10px 30px rgba(0,0,0,.35);
}
.nav__grid{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  width:100%;
}
.nav__left{display:flex;align-items:center;gap:34px;min-width:0;}
.nav__right{display:flex;align-items:center;gap:12px;flex-shrink:0;}

.logo{display:inline-flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0;}
.logo__mark{
  width:36px;height:36px;flex:0 0 36px;
  border-radius:var(--r-s);
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#04141A;
  font-weight:800;
  font-size:17px;
  box-shadow:0 0 18px rgba(46,211,192,.35);
}
.logo__text{display:flex;flex-direction:column;line-height:1.25;}
.logo__text b{font-size:15px;font-weight:700;color:var(--text);letter-spacing:.02em;}
.logo__text i{
  font-style:normal;
  font-size:11px;
  letter-spacing:.16em;
  color:var(--text-3);
}

.nav__channels{display:flex;align-items:center;gap:26px;}
.nav__channels a{
  position:relative;
  padding:6px 0;
  font-size:15px;
  color:var(--text-2);
  white-space:nowrap;
}
.nav__channels a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--brand),rgba(46,211,192,0));
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav__channels a:hover{color:var(--text);}
.nav__channels a:hover::after{transform:scaleX(1);}
.nav__channels a.is-active{color:var(--text);font-weight:600;}
.nav__channels a.is-active::after{transform:scaleX(1);}

.icon-btn{
  width:38px;height:38px;
  display:grid;place-items:center;
  border-radius:var(--r-s);
  border:1px solid var(--line);
  background:var(--glass);
  color:var(--text-2);
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.icon-btn:hover{color:var(--brand);border-color:var(--line-2);background:rgba(46,211,192,.08);}
.icon-btn:active{transform:scale(.985);}

.nav__toggle{
  display:none;
  width:40px;height:40px;
  border-radius:var(--r-s);
  border:1px solid var(--line);
  background:var(--glass);
  color:var(--text);
  place-items:center;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:var(--r-s);
  font-size:16px;
  font-weight:600;
  letter-spacing:.02em;
  border:1px solid transparent;
  transition:transform .2s var(--ease),box-shadow .22s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn:active{transform:scale(.985);}
.btn--glow{
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#04141A;
  box-shadow:0 0 24px rgba(46,211,192,.42);
}
.btn--glow:hover{
  color:#04141A;
  background:linear-gradient(135deg,#46E0CE,#26C4B1);
  box-shadow:0 0 34px rgba(46,211,192,.6);
}
.btn--ghost{
  background:var(--glass);
  border-color:var(--line);
  color:var(--text);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
}
.btn--ghost:hover{border-color:var(--brand);color:var(--brand);}
.btn--sm{height:38px;padding:0 18px;font-size:14px;border-radius:var(--r-s);}
.btn--pill{border-radius:var(--r-pill);}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:26px;
  padding:0 12px;
  border-radius:var(--r-pill);
  font-size:13px;
  font-weight:500;
  letter-spacing:.02em;
  white-space:nowrap;
}
.badge--brand{background:rgba(46,211,192,.12);color:var(--brand);border:1px solid rgba(46,211,192,.34);}
.badge--amber{background:rgba(255,162,75,.12);color:var(--amber);border:1px solid rgba(255,162,75,.36);}
.badge--muted{background:rgba(255,255,255,.05);color:var(--text-3);border:1px solid var(--line);}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
  color:var(--text-3);
  padding-top:28px;
}
.breadcrumb a{color:var(--text-3);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:rgba(110,136,144,.6);}
.breadcrumb .current{color:var(--text-2);}

/* ---------- 分类首屏 ---------- */
.cat-hero{
  position:relative;
  padding-bottom:72px;
  overflow:hidden;
}
.cat-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(126,214,222,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(126,214,222,.035) 1px,transparent 1px);
  background-size:24px 24px;
  mask-image:radial-gradient(circle at 30% 30%, #000 0%, transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 30% 30%, #000 0%, transparent 72%);
  pointer-events:none;
}
.cat-hero__grid{
  position:relative;
  display:grid;
  grid-template-columns:57% 43%;
  gap:44px;
  align-items:center;
  padding-top:44px;
}
.cat-hero__copy{min-width:0;}
.cat-hero__copy h1{
  font-size:44px;
  line-height:1.24;
  margin:20px 0 18px;
  letter-spacing:.005em;
}
.cat-hero__copy h1 .hl{
  color:var(--brand);
  text-shadow:0 0 26px rgba(46,211,192,.32);
}
.cat-hero__sub{
  font-size:17px;
  color:var(--text-2);
  max-width:560px;
  margin-bottom:26px;
}
.cat-hero__cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px;}
.cat-hero__points{
  display:flex;
  gap:34px;
  padding-top:22px;
  border-top:1px solid var(--line);
}
.cat-hero__points li{min-width:0;}
.cat-hero__points .num{
  display:block;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-variant-numeric:tabular-nums;
  font-size:26px;
  font-weight:700;
  color:var(--text);
  line-height:1.2;
}
.cat-hero__points .num em{font-style:normal;color:var(--brand);font-size:16px;margin-left:2px;}
.cat-hero__points .lbl{font-size:13px;color:var(--text-3);}

.cat-hero__media{
  position:relative;
  margin:0;
  border-radius:var(--r-l);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--sh-card);
  aspect-ratio:5 / 4;
  background:var(--panel);
}
.cat-hero__media img{width:100%;height:100%;object-fit:cover;opacity:.9;}
.cat-hero__media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(6,14,18,0) 40%,rgba(6,14,18,.82) 100%);
}
.cat-hero__float{
  position:absolute;
  left:20px;right:20px;bottom:20px;
  z-index:2;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:14px 18px;
  border-radius:var(--r-m);
  background:rgba(255,255,255,.06);
  border:1px solid var(--line-2);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
}
.cat-hero__float span{font-size:13px;color:var(--text-2);}
.cat-hero__float strong{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-variant-numeric:tabular-nums;
  color:var(--amber);
  font-size:18px;
}

/* ---------- 区块通用 ---------- */
.sec{padding:96px 0;}
.sec--tight{padding-top:64px;}
.sec--panel{background:linear-gradient(180deg,rgba(10,22,28,0) 0%,rgba(10,22,28,.86) 24%,rgba(10,22,28,.86) 76%,rgba(10,22,28,0) 100%);}

.sec-head{margin-bottom:44px;max-width:760px;}
.sec-head h2{font-size:28px;margin:14px 0 12px;}
.sec-head p{color:var(--text-2);font-size:16px;margin:0;}

/* ---------- 步骤布局（左锚点 + 右内容） ---------- */
.steps-layout{
  display:grid;
  grid-template-columns:256px minmax(0,1fr);
  gap:36px;
  align-items:start;
}

.anchor-nav{
  position:sticky;
  top:calc(var(--nav-h) + 24px);
  padding:20px;
  border-radius:var(--r-l);
  background:var(--panel);
  border:1px solid var(--line);
  box-shadow:var(--sh-card);
}
.anchor-nav h3{
  font-size:13px;
  letter-spacing:.14em;
  color:var(--text-3);
  font-weight:600;
  margin-bottom:14px;
}
.anchor-nav a{
  display:block;
  padding:10px 12px;
  border-radius:var(--r-s);
  border-left:2px solid transparent;
  font-size:15px;
  color:var(--text-2);
  margin-bottom:4px;
}
.anchor-nav a:hover{color:var(--text);background:rgba(255,255,255,.045);}
.anchor-nav a.is-current{
  color:var(--brand);
  background:rgba(46,211,192,.09);
  border-left-color:var(--brand);
  font-weight:600;
}

.step-list{min-width:0;}
.step-item{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);
  gap:28px;
  align-items:center;
  padding:28px;
  border-radius:var(--r-l);
  background:var(--panel);
  border:1px solid var(--line);
  box-shadow:var(--sh-card);
  scroll-margin-top:96px;
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.step-item + .step-item{margin-top:24px;}
.step-item:hover{transform:translateY(-4px);border-color:var(--line-2);box-shadow:0 26px 60px rgba(0,0,0,.5),inset 0 1px 0 rgba(255,255,255,.07);}
.step-item__no{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-variant-numeric:tabular-nums;
  font-size:34px;
  font-weight:700;
  color:var(--brand);
  line-height:1;
  margin-bottom:12px;
  display:block;
}
.step-item h3{font-size:20px;margin-bottom:10px;}
.step-item p{color:var(--text-2);font-size:15.5px;margin:0 0 14px;}
.step-item ul{margin-top:4px;}
.step-item ul li{
  position:relative;
  padding-left:18px;
  font-size:14.5px;
  color:var(--text-2);
  margin-bottom:6px;
  line-height:1.75;
}
.step-item ul li::before{
  content:"";
  position:absolute;
  left:0;top:11px;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--brand);
  opacity:.8;
}
.step-item__media{
  margin:0;
  border-radius:var(--r-m);
  overflow:hidden;
  border:1px solid var(--line);
  aspect-ratio:16 / 11;
  background:var(--raise);
}
.step-item__media img{width:100%;height:100%;object-fit:cover;}

/* ---------- 对照卡 ---------- */
.duo-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.compare-card{
  padding:28px;
  border-radius:var(--r-l);
  background:var(--panel);
  border:1px solid var(--line);
  box-shadow:var(--sh-card);
  transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.compare-card:hover{transform:translateY(-4px);border-color:var(--line-2);}
.compare-card h3{font-size:19px;margin-bottom:6px;}
.compare-card > p{font-size:14.5px;color:var(--text-3);margin:0 0 8px;}
.compare-card ul li{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:18px;
  padding:13px 0;
  border-bottom:1px dashed rgba(126,214,222,.14);
  font-size:14.5px;
}
.compare-card ul li:last-child{border-bottom:0;}
.compare-card ul li .k{color:var(--text);flex:0 0 38%;font-weight:500;}
.compare-card ul li .v{color:var(--text-2);text-align:right;flex:1;}

/* ---------- 深色数据面板 ---------- */
.panel-dark{
  padding:30px;
  border-radius:var(--r-l);
  background:var(--deep);
  border:1px solid rgba(126,214,222,.2);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
}
.panel-dark h3{font-size:19px;margin-bottom:8px;}
.panel-dark > p{color:var(--text-2);font-size:14.5px;margin:0 0 20px;}
.metric-row{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:18px;
}
.metric{
  padding:18px;
  border-radius:var(--r-m);
  background:rgba(255,255,255,.035);
  border:1px solid var(--line);
}
.metric .val{
  display:block;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-variant-numeric:tabular-nums;
  font-size:26px;
  font-weight:700;
  color:var(--amber);
  line-height:1.2;
}
.metric .val small{font-size:13px;color:var(--text-3);margin-left:4px;font-weight:500;}
.metric .cap{font-size:13.5px;color:var(--text-2);}

/* ---------- FAQ ---------- */
.faq-list{max-width:900px;}
.faq-item{
  border:1px solid var(--line);
  border-radius:var(--r-m);
  background:var(--glass);
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color .22s var(--ease),background-color .22s var(--ease);
}
.faq-item:hover{border-color:var(--line-2);}
.faq-item[open]{background:rgba(46,211,192,.05);border-color:rgba(46,211,192,.3);}
.faq-item summary{
  position:relative;
  display:flex;
  align-items:center;
  min-height:56px;
  padding:14px 56px 14px 22px;
  font-size:16px;
  font-weight:600;
  color:var(--text);
  cursor:pointer;
  list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";
  position:absolute;
  right:22px;
  top:50%;
  transform:translateY(-50%);
  font-family:ui-monospace,Menlo,monospace;
  font-size:20px;
  color:var(--brand);
  transition:transform .2s var(--ease);
}
.faq-item[open] summary::after{content:"–";transform:translateY(-50%) rotate(180deg);}
.faq-item .faq-body{
  padding:0 22px 20px;
  color:var(--text-2);
  font-size:15px;
  line-height:1.85;
}
.faq-item .faq-body p:last-child{margin-bottom:0;}

/* ---------- CTA 条 ---------- */
.cta-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  padding:34px 38px;
  border-radius:20px;
  background:linear-gradient(120deg,rgba(46,211,192,.14),rgba(255,162,75,.07));
  border:1px solid var(--line-2);
  box-shadow:var(--sh-card);
}
.cta-bar h3{font-size:22px;margin-bottom:8px;}
.cta-bar p{color:var(--text-2);font-size:14.5px;margin:0;}
.cta-bar__actions{display:flex;align-items:center;gap:18px;flex-shrink:0;}
.text-link{
  font-size:14.5px;
  color:var(--text-2);
  border-bottom:1px solid rgba(169,192,198,.4);
  padding-bottom:2px;
}
.text-link:hover{color:var(--brand);border-bottom-color:var(--brand);}

/* ---------- 跨分类推荐 ---------- */
.cross-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.cross-card{
  display:block;
  border-radius:var(--r-l);
  overflow:hidden;
  background:var(--panel);
  border:1px solid var(--line);
  box-shadow:var(--sh-card);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.cross-card:hover{transform:translateY(-4px);border-color:var(--line-2);box-shadow:0 26px 60px rgba(0,0,0,.5);}
.cross-card__media{aspect-ratio:16 / 9;overflow:hidden;background:var(--raise);}
.cross-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.cross-card:hover .cross-card__media img{transform:scale(1.03);}
.cross-card__body{padding:22px;}
.cross-card__body h3{font-size:18px;color:var(--text);margin:12px 0 8px;}
.cross-card__body p{font-size:14.5px;color:var(--text-2);margin:0;}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:24px;
  background:#050D11;
  border-top:1px solid var(--line);
  padding-top:64px;
}
.footer__grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:36px;
  padding-bottom:48px;
}
.footer__brand p{color:var(--text-3);font-size:14px;margin:16px 0 0;max-width:340px;line-height:1.85;}
.logo--footer .logo__mark{box-shadow:none;}
.footer__col h4{font-size:15px;color:var(--text);margin-bottom:16px;}
.footer__col ul li{margin-bottom:10px;}
.footer__col ul li a{color:var(--text-3);font-size:14px;}
.footer__col ul li a:hover{color:var(--brand);}
.footer__bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding:22px 0 26px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .cat-hero__copy h1{font-size:40px;}
}

@media (max-width:1023px){
  .nav__channels{
    position:fixed;
    top:var(--nav-h);
    left:0;right:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:14px 24px 22px;
    background:rgba(6,14,18,.97);
    border-bottom:1px solid var(--line);
    box-shadow:0 20px 40px rgba(0,0,0,.5);
    max-height:calc(100vh - var(--nav-h));
    overflow-y:auto;
  }
  .nav__channels.is-open{display:flex;}
  .nav__channels a{padding:14px 0;font-size:16px;border-bottom:1px solid rgba(126,214,222,.1);}
  .nav__channels a::after{display:none;}
  .nav__channels a.is-active{color:var(--brand);}
  .nav__toggle{display:grid;}
  .nav__left{gap:20px;}
  .cat-hero__grid{grid-template-columns:1fr;gap:32px;padding-top:36px;}
  .cat-hero__media{aspect-ratio:16 / 10;}
  .cat-hero__copy h1{font-size:36px;}
  .steps-layout{grid-template-columns:1fr;gap:24px;}
  .anchor-nav{position:static;display:flex;flex-wrap:nowrap;gap:10px;overflow-x:auto;padding:14px;}
  .anchor-nav h3{display:none;}
  .anchor-nav a{flex:0 0 auto;margin-bottom:0;border-left:0;border:1px solid var(--line);border-radius:var(--r-pill);padding:8px 16px;font-size:14px;}
  .anchor-nav a.is-current{border-color:var(--brand);}
  .duo-grid{grid-template-columns:1fr;}
  .footer__grid{grid-template-columns:1fr 1fr;gap:30px;}
  .sec{padding:72px 0;}
}

@media (max-width:767px){
  .container{padding-left:16px;padding-right:16px;}
  .cat-hero__copy h1{font-size:30px;}
  .cat-hero__sub{font-size:15.5px;}
  .cat-hero__points{gap:0;justify-content:space-between;}
  .cat-hero__points .num{font-size:22px;}
  .step-item{grid-template-columns:1fr;gap:20px;padding:22px;}
  .step-item__media{order:-1;aspect-ratio:16 / 10;}
  .metric-row{grid-template-columns:1fr;gap:12px;}
  .cross-grid{grid-template-columns:1fr;}
  .cta-bar{flex-direction:column;align-items:flex-start;padding:26px 22px;}
  .cta-bar__actions{width:100%;flex-direction:column;align-items:stretch;gap:14px;}
  .cta-bar__actions .btn{width:100%;}
  .cta-bar__actions .text-link{text-align:center;border-bottom:0;}
  .sec{padding:56px 0;}
  .sec-head h2{font-size:23px;}
  .cat-hero{padding-bottom:52px;}
  .footer__grid{grid-template-columns:1fr;gap:26px;padding-bottom:34px;}
  .footer__bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}

@media (max-width:559px){
  .btn{width:100%;}
  .cat-hero__cta{flex-direction:column;align-items:stretch;}
  .nav__right .btn--sm{width:auto;}
  .compare-card ul li{flex-direction:column;gap:4px;}
  .compare-card ul li .v{text-align:left;}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
:root{
  --bg:#060E12;
  --panel:#0A161C;
  --raise:#0E2028;
  --brand:#2ED3C0;
  --brand-deep:#21B7A6;
  --accent:#FFA24B;
  --text:#EAF6F7;
  --muted:#A9C0C6;
  --weak:#6E8890;
  --glass:rgba(255,255,255,.045);
  --line:rgba(126,214,222,.16);
  --line-soft:rgba(126,214,222,.09);
  --r-sm:10px;
  --r:14px;
  --r-lg:18px;
  --shadow:0 18px 48px rgba(0,0,0,.45);
  --shadow-soft:0 10px 30px rgba(0,0,0,.35);
  --c-max:1200px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --mono:"JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Courier New",monospace;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;border:0;}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease);}
a:hover,a:focus{color:#63E8DA;}
h1,h2,h3,h4{line-height:1.3;margin:0;font-weight:700;letter-spacing:.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
::selection{background:rgba(46,211,192,.3);color:#F4FFFE;}

.container{width:100%;max-width:var(--c-max);margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;}

/* ---------- 导航 ---------- */
.site-nav{
  position:sticky;top:0;z-index:80;
  background:rgba(8,20,26,.74);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
  transition:background .22s var(--ease),box-shadow .22s var(--ease);
}
.site-nav.is-stuck{background:rgba(6,14,18,.94);box-shadow:var(--shadow-soft);}
.nav__grid{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px;transition:height .22s var(--ease);}
.site-nav.is-stuck .nav__grid{height:56px;}
.nav__left{display:flex;align-items:center;gap:26px;min-width:0;}
.nav__right{display:flex;align-items:center;gap:12px;flex:0 0 auto;}

.logo{display:inline-flex;align-items:center;gap:10px;color:var(--text);}
.logo:hover,.logo:focus{color:var(--text);}
.logo__mark{
  width:34px;height:34px;flex:0 0 auto;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(140deg,#3CE2CF,var(--brand-deep));
  color:#04141A;font-weight:700;font-size:17px;
  box-shadow:0 0 18px rgba(46,211,192,.35);
}
.logo__text{display:flex;flex-direction:column;line-height:1.16;}
.logo__text b{font-size:15px;font-weight:700;letter-spacing:.02em;}
.logo__text i{font-style:normal;font-size:11px;color:var(--muted);letter-spacing:.06em;}

.nav__channels{display:flex;align-items:center;gap:4px;}
.nav__channels a{
  position:relative;display:inline-block;padding:8px 12px;border-radius:10px;
  color:var(--muted);font-size:14px;transition:color .2s var(--ease),background .2s var(--ease);
}
.nav__channels a:hover,.nav__channels a:focus{color:var(--text);background:var(--glass);}
.nav__channels a.is-active{color:var(--text);}
.nav__channels a.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;border-radius:2px;
  background:var(--brand);box-shadow:0 0 12px rgba(46,211,192,.7);
}

.icon-btn{
  width:38px;height:38px;display:inline-grid;place-items:center;border-radius:10px;
  background:var(--glass);border:1px solid var(--line);color:var(--muted);cursor:pointer;
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.icon-btn:hover{color:var(--text);border-color:rgba(46,211,192,.55);background:rgba(46,211,192,.08);}
.nav__toggle{display:none;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 22px;border-radius:var(--r-sm);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform .2s var(--ease),box-shadow .24s var(--ease),background .24s var(--ease),border-color .24s var(--ease),color .2s var(--ease);
}
.btn:active{transform:scale(.985);}
.btn--glow{
  background:linear-gradient(135deg,#3CE2CF,var(--brand-deep));
  color:#04141A;
  box-shadow:0 0 24px rgba(46,211,192,.45);
}
.btn--glow:hover,.btn--glow:focus{color:#04141A;filter:brightness(1.08);box-shadow:0 0 34px rgba(46,211,192,.62);}
.btn--ghost{background:var(--glass);border-color:var(--line);color:var(--text);}
.btn--ghost:hover,.btn--ghost:focus{color:var(--text);border-color:rgba(46,211,192,.6);background:rgba(46,211,192,.08);}
.btn--sm{min-height:38px;padding:0 16px;font-size:13.5px;border-radius:9px;}
.btn--block{width:100%;}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:999px;
  font-size:12.5px;font-weight:500;letter-spacing:.02em;border:1px solid transparent;white-space:nowrap;
}
.tag--brand{background:rgba(46,211,192,.12);border-color:rgba(46,211,192,.42);color:#7DEBDE;}
.tag--accent{background:rgba(255,162,75,.12);border-color:rgba(255,162,75,.42);color:#FFC38A;}
.tag--muted{background:rgba(255,255,255,.05);border-color:var(--line);color:var(--muted);}

/* ---------- 首屏 ---------- */
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);padding:96px 0 88px;}
.page-hero__bg{position:absolute;inset:0;z-index:0;}
.page-hero__bg img{width:100%;height:100%;object-fit:cover;opacity:.4;}
.page-hero__bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(6,14,18,.97) 0%,rgba(6,14,18,.82) 40%,rgba(6,14,18,.45) 70%,rgba(6,14,18,.9) 100%);
}
.page-hero::before{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background-image:linear-gradient(rgba(126,214,222,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(126,214,222,.055) 1px,transparent 1px);
  background-size:24px 24px;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.95),transparent 84%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.95),transparent 84%);
}
.page-hero__inner{position:relative;z-index:2;max-width:840px;}
.page-hero h1{margin:18px 0 16px;font-size:44px;line-height:1.24;}
.page-hero h1 span{color:var(--brand);}
.page-hero__lead{color:var(--muted);font-size:17px;line-height:1.85;max-width:660px;}
.page-hero__tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.page-hero__note{
  margin-top:26px;display:inline-flex;align-items:center;gap:10px;
  padding:10px 16px;border-radius:var(--r-sm);background:var(--glass);
  border:1px solid var(--line);color:var(--muted);font-size:14px;
  -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
}
.page-hero__note i{color:var(--accent);}

/* ---------- 板块标题 ---------- */
.section__head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:42px;}
.section__title{font-size:28px;line-height:1.35;margin-bottom:10px;}
.section__title::before{
  content:"";display:inline-block;width:4px;height:19px;border-radius:2px;background:var(--brand);
  margin-right:12px;vertical-align:-2px;box-shadow:0 0 12px rgba(46,211,192,.6);
}
.section__desc{margin:0;color:var(--muted);font-size:15.5px;max-width:660px;line-height:1.8;}
.section__link{font-size:14.5px;color:var(--brand);white-space:nowrap;}

/* ---------- 卡片瀑布 ---------- */
.falls{margin-left:-10px;margin-right:-10px;}
.falls>.cell{padding:0 10px 20px;}
.fall{
  height:100%;display:flex;flex-direction:column;overflow:hidden;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.fall:hover{transform:translateY(-4px);border-color:rgba(46,211,192,.55);box-shadow:var(--shadow);}
.fall__media{position:relative;overflow:hidden;aspect-ratio:16/9;background:var(--raise);}
.fall__media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.fall:hover .fall__media img{transform:scale(1.04);}
.fall--43 .fall__media{aspect-ratio:4/3;}
.fall--11 .fall__media{aspect-ratio:1/1;}
.fall__body{padding:18px 20px 22px;display:flex;flex-direction:column;flex:1 1 auto;}
.fall__body h3{margin:0 0 8px;font-size:17.5px;line-height:1.45;}
.fall__body p{margin:0 0 16px;color:var(--muted);font-size:14.5px;line-height:1.8;flex:1 1 auto;}
.fall--row{flex-direction:row;}
.fall--row .fall__media{flex:0 0 42%;width:42%;aspect-ratio:auto;min-height:230px;}
.fall--row .fall__body{justify-content:center;padding:30px 34px;}
.fall--row .fall__body h3{font-size:20px;}

/* ---------- 时间线 ---------- */
.timeline{display:grid;}
.timeline__item{position:relative;display:grid;grid-template-columns:64px minmax(0,1fr);gap:18px;padding-bottom:30px;}
.timeline__item::before{
  content:"";position:absolute;left:31px;top:28px;bottom:-4px;width:2px;
  background:linear-gradient(180deg,rgba(46,211,192,.5),rgba(46,211,192,.06));
}
.timeline__item:last-child{padding-bottom:0;}
.timeline__item:last-child::before{display:none;}
.timeline__node span{
  display:block;width:14px;height:14px;border-radius:50%;background:var(--brand);
  margin:11px auto 0;box-shadow:0 0 0 6px rgba(46,211,192,.1);
}
.timeline__body{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r);
  padding:22px 24px;box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  transition:border-color .22s var(--ease),transform .22s var(--ease);
}
.timeline__body:hover{border-color:rgba(46,211,192,.45);transform:translateY(-3px);}
.timeline__time{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:12.5px;color:var(--accent);letter-spacing:.04em;margin-bottom:8px;}
.timeline__body h3{font-size:17.5px;margin-bottom:8px;}
.timeline__body p{color:var(--muted);font-size:14.8px;line-height:1.85;}

/* ---------- 自查清单 ---------- */
.checks{margin-left:-11px;margin-right:-11px;}
.checks>.cell{padding:0 11px 22px;}
.check{
  height:100%;display:flex;gap:16px;padding:22px 24px;border-radius:var(--r);
  background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.02));
  border:1px solid var(--line);box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  transition:border-color .22s var(--ease),transform .22s var(--ease);
}
.check:hover{border-color:rgba(46,211,192,.5);transform:translateY(-3px);}
.check__icon{
  width:40px;height:40px;flex:0 0 auto;border-radius:12px;display:grid;place-items:center;
  background:rgba(46,211,192,.12);border:1px solid rgba(46,211,192,.35);color:var(--brand);font-size:16px;
}
.check h3{font-size:16.5px;margin-bottom:6px;}
.check p{color:var(--muted);font-size:14.5px;line-height:1.8;}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:12px;max-width:900px;}
.faq__item{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);}
.faq__item.is-open{border-color:rgba(46,211,192,.5);box-shadow:var(--shadow-soft);}
.faq__q{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:12px 20px;background:none;border:0;color:var(--text);font-size:16px;font-weight:600;
  text-align:left;cursor:pointer;transition:color .2s var(--ease);
}
.faq__q:hover{color:#9BF2E8;}
.faq__icon{
  width:26px;height:26px;flex:0 0 auto;border-radius:8px;display:grid;place-items:center;
  border:1px solid var(--line);color:var(--brand);font-size:13px;
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.faq__item.is-open .faq__icon{transform:rotate(90deg);border-color:rgba(46,211,192,.6);}
.faq__a{max-height:0;overflow:hidden;transition:max-height .2s var(--ease);}
.faq__a p{padding:0 20px 20px;color:var(--muted);font-size:15px;line-height:1.85;}

/* ---------- CTA ---------- */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  padding:38px 40px;border-radius:var(--r-lg);
  background:linear-gradient(120deg,rgba(46,211,192,.14),rgba(10,22,28,.9) 58%,rgba(255,162,75,.08));
  border:1px solid rgba(46,211,192,.32);
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.07);
}
.cta-band__text h2{font-size:24px;margin-bottom:8px;}
.cta-band__text p{color:var(--muted);font-size:15px;max-width:560px;}
.cta-band__actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap;}
.cta-band__link{font-size:14.5px;color:var(--muted);border-bottom:1px dashed rgba(126,214,222,.35);padding-bottom:2px;}
.cta-band__link:hover{color:var(--brand);border-color:var(--brand);}

/* ---------- 推荐入口 ---------- */
.recos{margin-left:-12px;margin-right:-12px;}
.recos>.cell{padding:0 12px 22px;}
.reco{
  display:flex;gap:18px;height:100%;padding:18px;border-radius:var(--r);
  background:var(--panel);border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.reco:hover{transform:translateY(-4px);border-color:rgba(46,211,192,.55);box-shadow:var(--shadow);}
.reco__media{width:132px;flex:0 0 auto;aspect-ratio:4/3;border-radius:12px;overflow:hidden;background:var(--raise);}
.reco__media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.reco:hover .reco__media img{transform:scale(1.04);}
.reco__body{display:flex;flex-direction:column;justify-content:center;gap:8px;min-width:0;}
.reco__body h3{font-size:17px;}
.reco__body p{color:var(--muted);font-size:14px;line-height:1.75;}
.reco__body span{color:var(--brand);font-size:13.5px;}

/* ---------- 页脚 ---------- */
.site-footer{background:#050B0F;border-top:1px solid var(--line);padding:64px 0 28px;}
.footer__grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;}
.footer__brand p{color:var(--muted);font-size:14px;line-height:1.85;margin-top:16px;max-width:330px;}
.logo--footer{margin-bottom:2px;}
.footer__col h4{font-size:14px;margin-bottom:14px;color:var(--text);}
.footer__col ul{display:grid;gap:10px;}
.footer__col a{color:var(--muted);font-size:14px;}
.footer__col a:hover{color:var(--brand);}
.footer__bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line-soft);
  color:var(--weak);font-size:13px;
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .page-hero h1{font-size:40px;}
}
@media (max-width:1023px){
  .section{padding:72px 0;}
  .section--tight{padding:56px 0;}
  .nav__toggle{display:inline-grid;}
  .nav__channels{
    position:absolute;left:0;right:0;top:100%;display:none;flex-direction:column;align-items:stretch;gap:4px;
    padding:12px 16px 18px;background:rgba(6,14,18,.97);
    border-bottom:1px solid var(--line);
    -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
  }
  .nav__channels.is-open{display:flex;}
  .nav__channels a{padding:12px 14px;font-size:15px;}
  .nav__channels a.is-active::after{left:14px;right:auto;width:22px;bottom:6px;}
  .page-hero{padding:72px 0 64px;}
  .page-hero h1{font-size:36px;}
  .footer__grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767px){
  .section{padding:56px 0;}
  .section__head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:32px;}
  .section__title{font-size:23px;}
  .container{padding:0 16px;}
  .nav__grid{height:58px;gap:14px;}
  .logo__mark{width:30px;height:30px;font-size:15px;}
  .logo__text b{font-size:14px;}
  .logo__text i{font-size:10px;}
  .page-hero{padding:56px 0 52px;}
  .page-hero h1{font-size:31px;}
  .page-hero__lead{font-size:15.5px;}
  .fall--row{flex-direction:column;}
  .fall--row .fall__media{flex:none;width:100%;aspect-ratio:16/9;min-height:0;}
  .fall--row .fall__body{padding:20px 20px 24px;}
  .fall--row .fall__body h3{font-size:18px;}
  .timeline__item{grid-template-columns:44px minmax(0,1fr);gap:12px;}
  .timeline__item::before{left:21px;}
  .timeline__body{padding:18px 18px;}
  .cta-band{padding:28px 22px;flex-direction:column;align-items:flex-start;}
  .cta-band__actions{width:100%;flex-direction:column;align-items:stretch;gap:14px;}
  .cta-band__actions .btn{width:100%;}
  .cta-band__link{text-align:center;}
  .reco{flex-direction:column;}
  .reco__media{width:100%;aspect-ratio:16/9;}
  .footer__grid{grid-template-columns:1fr;gap:26px;}
}
@media (max-width:559px){
  .nav__right .btn--sm{padding:0 12px;font-size:12.5px;min-height:34px;}
  .icon-btn{width:34px;height:34px;}
  .page-hero h1{font-size:28px;}
  .btn{min-height:48px;width:100%;}
  .btn--sm{width:auto;}
  .footer__bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}
@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
}