/* roulang page: index */
:root{
  --bg:#07111F;
  --bg-2:#0B1A2B;
  --panel:rgba(10,25,42,.62);
  --panel-solid:#0D1F33;
  --cyan:#21D4E8;
  --green:#B6F34A;
  --amber:#FFB020;
  --text:#F5FAFF;
  --text-2:#A9BED3;
  --text-3:#6F86A0;
  --success:#34D399;
  --warning:#FBBF24;
  --error:#F87171;
  --border:rgba(130,220,255,.16);
  --border-strong:rgba(130,220,255,.34);
  --radius-sm:10px;
  --radius:16px;
  --radius-lg:20px;
  --shadow:0 20px 60px rgba(0,0,0,.35);
  --max:1240px;
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background-image:radial-gradient(rgba(33,212,232,.10) 1px,transparent 1px);
  background-size:34px 34px;
  opacity:.55;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.22;letter-spacing:-.01em}
h1{font-size:clamp(30px,3.6vw,52px);line-height:1.12}
h2{font-size:clamp(24px,2.5vw,34px)}
h3{font-size:clamp(18px,1.5vw,22px)}
time,.num{font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
::selection{background:rgba(33,212,232,.35)}

.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}
.section{padding:88px 0;position:relative}
.section--tight{padding:64px 0}
.section--alt{background:linear-gradient(180deg,rgba(11,26,43,.72),rgba(7,17,31,0))}
.sec-head{max-width:760px;margin-bottom:44px}
.sec-head--center{margin-left:auto;margin-right:auto;text-align:center}
.sec-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--cyan);
  padding:6px 14px;border-radius:999px;
  background:rgba(33,212,232,.10);
  border:1px solid rgba(33,212,232,.28);
  margin-bottom:16px;
}
.sec-tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--green);box-shadow:0 0 10px var(--green)}
.sec-title{margin-bottom:14px}
.sec-desc{color:var(--text-2);font-size:16px}

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:200;
  height:72px;
  background:rgba(7,17,31,.80);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
}
.header-inner{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand__mark{
  width:36px;height:36px;border-radius:12px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--cyan),var(--green));
  color:#05131F;font-weight:800;font-size:17px;
  box-shadow:0 0 22px rgba(33,212,232,.42);
}
.brand__text{font-weight:800;font-size:17px;color:var(--text);white-space:nowrap;letter-spacing:.01em}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;
  padding:9px 14px;border-radius:10px;
  font-size:15px;color:var(--text-2);
  transition:color .2s,background .2s;
  white-space:nowrap;
}
.nav-link:hover{color:var(--text);background:rgba(33,212,232,.09)}
.nav-link.is-active{color:var(--text);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:1px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--green));
  box-shadow:0 0 10px rgba(33,212,232,.9);
}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;cursor:pointer;
  font-weight:600;font-size:15px;
  height:46px;padding:0 22px;border-radius:11px;
  transition:transform .22s,box-shadow .22s,background .22s,border-color .22s,color .22s;
  white-space:nowrap;
}
.btn--sm{height:40px;padding:0 18px;font-size:14px}
.btn--lg{height:52px;padding:0 28px;font-size:16px}
.btn--block{width:100%}
.btn--primary{
  background:linear-gradient(135deg,var(--cyan),var(--green));
  color:#05131F;
  box-shadow:0 0 0 1px rgba(255,255,255,.08),0 10px 30px rgba(33,212,232,.28);
}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,255,255,.16),0 16px 42px rgba(33,212,232,.45)}
.btn--primary:active{transform:translateY(0)}
.btn--ghost{
  background:rgba(10,25,42,.62);
  border-color:var(--border-strong);
  color:var(--text);
  backdrop-filter:blur(14px);
}
.btn--ghost:hover{border-color:var(--cyan);box-shadow:0 0 22px rgba(33,212,232,.28);transform:translateY(-2px)}
.btn--amber{
  background:linear-gradient(135deg,var(--amber),#FFD37A);
  color:#2A1900;
  box-shadow:0 0 0 1px rgba(255,255,255,.08),0 10px 30px rgba(255,176,32,.28);
}
.btn--amber:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,255,255,.16),0 16px 42px rgba(255,176,32,.42)}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}

/* ============ 徽章 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;line-height:1;
  padding:6px 11px;border-radius:999px;
  border:1px solid transparent;white-space:nowrap;
}
.badge--cyan{color:var(--cyan);background:rgba(33,212,232,.12);border-color:rgba(33,212,232,.30)}
.badge--green{color:var(--green);background:rgba(182,243,74,.12);border-color:rgba(182,243,74,.30)}
.badge--amber{color:var(--amber);background:rgba(255,176,32,.12);border-color:rgba(255,176,32,.30)}
.badge--muted{color:var(--text-3);background:rgba(130,220,255,.06);border-color:var(--border)}

/* ============ Hero ============ */
.hero{position:relative;padding:150px 0 92px;overflow:hidden;isolation:isolate}
.hero__bg{
  position:absolute;inset:0;z-index:-2;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  opacity:.30;
}
.hero__veil{
  position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(900px 520px at 78% 18%,rgba(33,212,232,.22),transparent 62%),
    radial-gradient(720px 460px at 8% 80%,rgba(182,243,74,.14),transparent 60%),
    linear-gradient(180deg,rgba(7,17,31,.74) 0%,rgba(7,17,31,.94) 62%,var(--bg) 100%);
}
.hero__grid{display:grid;grid-template-columns:1.06fr .94fr;gap:52px;align-items:center}
.hero h1{margin-bottom:20px}
.hero h1 em{
  font-style:normal;
  background:linear-gradient(100deg,var(--cyan),var(--green));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero__sub{font-size:17px;color:var(--text-2);max-width:560px;margin-bottom:30px}
.hero__cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}
.hero__facts{display:flex;flex-wrap:wrap;gap:12px}
.fact{
  display:flex;align-items:center;gap:9px;
  padding:10px 16px;border-radius:12px;
  background:var(--panel);border:1px solid var(--border);
  backdrop-filter:blur(14px);
  font-size:14px;color:var(--text-2);
}
.fact b{color:var(--text);font-weight:700}

/* 登录卡 */
.login-card{
  position:relative;
  background:rgba(10,25,42,.72);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:30px 28px 26px;
  box-shadow:var(--shadow);
}
.login-card::before{
  content:"";position:absolute;inset:-1px;border-radius:calc(var(--radius-lg) + 1px);
  background:linear-gradient(140deg,rgba(33,212,232,.45),rgba(182,243,74,.18) 45%,transparent 70%);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
  padding:1px;pointer-events:none;
}
.login-card__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.login-card__title{font-size:20px;font-weight:800}
.login-card__hint{font-size:12px;color:var(--text-3)}
.field{display:block;margin-bottom:15px}
.field__label{display:block;font-size:13px;color:var(--text-3);margin-bottom:7px;font-weight:500}
.input{
  width:100%;height:47px;border-radius:10px;
  background:rgba(7,17,31,.74);
  border:1px solid rgba(130,220,255,.18);
  padding:0 14px;color:var(--text);font-size:15px;
  transition:border-color .2s,box-shadow .2s,background .2s;
}
.input::placeholder{color:#5A708A}
.input:hover{border-color:rgba(130,220,255,.30)}
.input:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(33,212,232,.18)}
.input.is-error{border-color:var(--error);box-shadow:0 0 0 3px rgba(248,113,113,.15)}
.input.is-ok{border-color:var(--success);box-shadow:0 0 0 3px rgba(52,211,153,.15)}
.field__err{display:block;font-size:12px;color:var(--error);margin-top:6px}
.field__ok{display:block;font-size:12px;color:var(--success);margin-top:6px}
.login-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:4px 0 18px;font-size:13px}
.check{display:flex;align-items:center;gap:8px;color:var(--text-2);cursor:pointer}
.check input{
  appearance:none;width:17px;height:17px;border-radius:5px;
  border:1px solid rgba(130,220,255,.35);background:rgba(7,17,31,.8);
  cursor:pointer;position:relative;transition:.2s;flex-shrink:0;margin:0;
}
.check input:checked{background:linear-gradient(135deg,var(--cyan),var(--green));border-color:transparent}
.check input:checked::after{
  content:"";position:absolute;left:5px;top:2px;width:5px;height:9px;
  border:2px solid #05131F;border-top:0;border-left:0;transform:rotate(42deg);
}
.link-cyan{color:var(--cyan);transition:.2s}
.link-cyan:hover{color:var(--green);text-decoration:underline}
.login-foot{margin-top:18px;padding-top:16px;border-top:1px solid var(--border);font-size:13px;color:var(--text-3);display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}
.login-code{display:flex;gap:10px}
.login-code .input{flex:1}

/* ============ 数据条 ============ */
.stat-bar{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
  padding:26px;border-radius:var(--radius-lg);
  background:var(--panel);border:1px solid var(--border);
  backdrop-filter:blur(14px);box-shadow:var(--shadow);
}
.stat{padding:6px 10px;border-left:2px solid rgba(33,212,232,.35)}
.stat:first-child{border-left-color:var(--cyan)}
.stat__num{font-size:32px;font-weight:800;line-height:1.1;color:var(--text);font-variant-numeric:tabular-nums}
.stat__num span{font-size:16px;color:var(--cyan);margin-left:3px;font-weight:700}
.stat__label{margin-top:6px;font-size:13px;color:var(--text-3)}

/* ============ Bento 功能 ============ */
.bento{display:grid;grid-template-columns:repeat(6,1fr);gap:20px}
.b-card{
  grid-column:span 2;
  position:relative;overflow:hidden;
  padding:26px;border-radius:var(--radius-lg);
  background:var(--panel);border:1px solid var(--border);
  backdrop-filter:blur(14px);
  transition:transform .25s,border-color .25s,box-shadow .25s;
}
.b-card:hover{transform:translateY(-2px);border-color:var(--border-strong);box-shadow:0 20px 60px rgba(0,0,0,.45),0 0 30px rgba(33,212,232,.14)}
.b-card--wide{grid-column:span 3}
.b-card__ico{
  width:44px;height:44px;border-radius:13px;display:grid;place-items:center;
  background:rgba(33,212,232,.12);border:1px solid rgba(33,212,232,.28);
  color:var(--cyan);font-size:20px;font-weight:800;margin-bottom:18px;
}
.b-card__title{font-size:20px;margin-bottom:10px}
.b-card__desc{color:var(--text-2);font-size:15px}
.b-card__list{margin-top:16px;display:flex;flex-wrap:wrap;gap:8px}
.b-card__img{
  margin:-26px -26px 20px;height:150px;overflow:hidden;position:relative;background:#08192a;
}
.b-card__img img{width:100%;height:100%;object-fit:cover;opacity:.85;transition:transform .5s}
.b-card:hover .b-card__img img{transform:scale(1.05)}
.b-card__img::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,17,31,.15),rgba(10,25,42,.92))}

/* ============ 时间线 / 使用场景 ============ */
.timeline{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.timeline::before{
  content:"";position:absolute;left:0;right:0;top:26px;height:1px;
  background:linear-gradient(90deg,rgba(33,212,232,.05),rgba(33,212,232,.55),rgba(182,243,74,.35),rgba(33,212,232,.05));
}
.step{position:relative;padding-top:0}
.step__dot{
  position:relative;z-index:2;
  width:52px;height:52px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--panel-solid);border:1px solid rgba(33,212,232,.45);
  color:var(--cyan);font-weight:800;font-size:17px;
  box-shadow:0 0 0 6px rgba(7,17,31,.9),0 0 24px rgba(33,212,232,.20);
  margin-bottom:20px;
}
.step:hover .step__dot{border-color:var(--green);color:var(--green);box-shadow:0 0 0 6px rgba(7,17,31,.9),0 0 28px rgba(182,243,74,.32)}
.step__title{font-size:19px;margin-bottom:8px}
.step__desc{color:var(--text-2);font-size:14.5px}

/* ============ 案例 / 评价 ============ */
.case-wrap{display:grid;grid-template-columns:.92fr 1.08fr;gap:24px;align-items:stretch}
.case-board{
  padding:28px;border-radius:var(--radius-lg);
  background:linear-gradient(160deg,rgba(33,212,232,.10),rgba(10,25,42,.72) 45%);
  border:1px solid var(--border);backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
}
.case-board__title{font-size:20px;margin-bottom:6px}
.case-board__sub{font-size:13.5px;color:var(--text-3);margin-bottom:22px}
.case-metrics{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.case-metric{padding:16px;border-radius:14px;background:rgba(7,17,31,.55);border:1px solid var(--border)}
.case-metric b{display:block;font-size:26px;font-weight:800;color:var(--green);font-variant-numeric:tabular-nums}
.case-metric span{font-size:13px;color:var(--text-3)}
.bar{height:8px;border-radius:8px;background:rgba(130,220,255,.12);overflow:hidden;margin-top:14px}
.bar i{display:block;height:100%;border-radius:8px;background:linear-gradient(90deg,var(--cyan),var(--green));box-shadow:0 0 14px rgba(33,212,232,.55)}
.quotes{display:grid;gap:18px}
.quote{
  padding:24px;border-radius:var(--radius-lg);
  background:var(--panel);border:1px solid var(--border);
  backdrop-filter:blur(14px);
  transition:transform .25s,border-color .25s,box-shadow .25s;
}
.quote:hover{transform:translateY(-2px);border-color:var(--border-strong);box-shadow:0 0 30px rgba(33,212,232,.14)}
.quote__text{color:var(--text-2);font-size:15px;margin-bottom:16px}
.quote__who{display:flex;align-items:center;gap:12px}
.avatar{
  width:42px;height:42px;border-radius:50%;flex-shrink:0;
  display:grid;place-items:center;font-weight:800;color:#05131F;
  background:linear-gradient(135deg,var(--cyan),var(--green));font-size:15px;
}
.quote__name{font-weight:700;font-size:14.5px}
.quote__role{font-size:12.5px;color:var(--text-3)}

/* ============ 价格 ============ */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch}
.price{
  position:relative;
  padding:30px 26px;border-radius:var(--radius-lg);
  background:var(--panel);border:1px solid var(--border);
  backdrop-filter:blur(14px);
  display:flex;flex-direction:column;
  transition:transform .25s,border-color .25s,box-shadow .25s;
}
.price:hover{transform:translateY(-3px);border-color:var(--border-strong);box-shadow:0 0 34px rgba(33,212,232,.16)}
.price--best{
  border-color:rgba(255,176,32,.42);
  background:linear-gradient(165deg,rgba(255,176,32,.10),rgba(10,25,42,.78) 42%);
  box-shadow:0 0 0 1px rgba(255,176,32,.16),0 24px 70px rgba(0,0,0,.5);
}
.price--best::after{
  content:"推荐选择";
  position:absolute;top:-1px;right:22px;
  font-size:12px;font-weight:700;color:#2A1900;
  background:linear-gradient(135deg,var(--amber),#FFD37A);
  padding:6px 14px;border-radius:0 0 12px 12px;
}
.price__name{font-size:19px;margin-bottom:8px}
.price__desc{font-size:13.5px;color:var(--text-3);margin-bottom:20px;min-height:44px}
.price__amount{font-size:38px;font-weight:800;line-height:1;font-variant-numeric:tabular-nums;margin-bottom:6px}
.price__amount small{font-size:15px;font-weight:600;color:var(--text-3);margin-left:4px}
.price__unit{font-size:13px;color:var(--text-3);margin-bottom:22px}
.price__list{display:grid;gap:11px;margin-bottom:26px}
.price__list li{display:flex;gap:10px;font-size:14.5px;color:var(--text-2)}
.price__list li::before{
  content:"";flex-shrink:0;width:16px;height:16px;border-radius:50%;margin-top:5px;
  background:rgba(182,243,74,.16);border:1px solid rgba(182,243,74,.5);
  background-image:linear-gradient(45deg,transparent 45%,var(--green) 45%,var(--green) 55%,transparent 55%);
}
.price .btn{margin-top:auto}

/* ============ 最新信息 ============ */
.news-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:32px}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{
  display:flex;flex-direction:column;overflow:hidden;
  border-radius:var(--radius-lg);
  background:var(--panel);border:1px solid var(--border);
  backdrop-filter:blur(14px);
  transition:transform .25s,border-color .25s,box-shadow .25s;
}
.news-card:hover{transform:translateY(-2px);border-color:var(--border-strong);box-shadow:0 0 32px rgba(33,212,232,.16)}
.news-card__thumb{display:block;height:172px;overflow:hidden;background:#08192a;position:relative}
.news-card__thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.news-card:hover .news-card__thumb img{transform:scale(1.06)}
.news-card__body{padding:22px;display:flex;flex-direction:column;flex:1}
.news-card__meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.news-card__title{font-size:18px;line-height:1.42;margin-bottom:10px}
.news-card__title a:hover{color:var(--cyan)}
.news-card__desc{font-size:14.5px;color:var(--text-2);margin-bottom:18px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.news-card__more{margin-top:auto;font-size:14px;font-weight:600;color:var(--cyan);display:inline-flex;align-items:center;gap:6px}
.news-card__more::after{content:"→";transition:transform .25s}
.news-card__more:hover::after{transform:translateX(4px)}
.empty-state{
  grid-column:1/-1;text-align:center;padding:56px 24px;
  border-radius:var(--radius-lg);border:1px dashed rgba(130,220,255,.26);
  background:rgba(10,25,42,.45);
}
.empty-state__ico{
  width:56px;height:56px;margin:0 auto 16px;border-radius:16px;
  display:grid;place-items:center;font-size:24px;color:var(--text-3);
  background:rgba(33,212,232,.08);border:1px solid var(--border);
}
.empty-state__text{color:var(--text-2);margin-bottom:18px}

/* ============ FAQ ============ */
.faq{max-width:920px;margin:0 auto;display:grid;gap:14px}
.faq-item{
  border-radius:var(--radius);overflow:hidden;
  background:var(--panel);border:1px solid var(--border);
  backdrop-filter:blur(14px);
  transition:border-color .25s,box-shadow .25s;
}
.faq-item.is-open{border-color:rgba(33,212,232,.45);box-shadow:0 0 26px rgba(33,212,232,.14)}
.faq-q{
  width:100%;text-align:left;background:transparent;border:0;cursor:pointer;
  display:flex;align-items:center;gap:16px;
  padding:20px 22px;position:relative;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--cyan),var(--green));
  opacity:0;transition:opacity .25s;
}
.faq-item.is-open .faq-q::before{opacity:1}
.faq-q h3{font-size:17px;font-weight:700;flex:1;line-height:1.5}
.faq-q__ico{
  width:26px;height:26px;border-radius:8px;flex-shrink:0;
  display:grid;place-items:center;
  background:rgba(33,212,232,.10);border:1px solid rgba(33,212,232,.28);
  color:var(--cyan);font-size:16px;font-weight:700;line-height:1;
  transition:transform .28s,background .25s,color .25s;
}
.faq-item.is-open .faq-q__ico{transform:rotate(45deg);background:rgba(182,243,74,.16);border-color:rgba(182,243,74,.45);color:var(--green)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .34s ease}
.faq-a__inner{padding:0 22px 22px 22px;color:var(--text-2);font-size:15px;line-height:1.82}

/* ============ 底部 CTA ============ */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:24px;
  padding:56px 48px;
  background:linear-gradient(135deg,rgba(33,212,232,.16),rgba(11,26,43,.92) 46%,rgba(182,243,74,.10));
  border:1px solid rgba(33,212,232,.30);
  box-shadow:var(--shadow);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(520px 300px at 88% 20%,rgba(33,212,232,.24),transparent 65%);
  pointer-events:none;
}
.cta-band__inner{position:relative;display:grid;grid-template-columns:1.3fr .7fr;gap:32px;align-items:center}
.cta-band h2{margin-bottom:12px}
.cta-band p{color:var(--text-2);max-width:620px}
.cta-band__actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;margin-top:40px;
  background:linear-gradient(180deg,rgba(7,17,31,.4),rgba(4,10,18,.95));
  border-top:1px solid rgba(33,212,232,.35);
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(33,212,232,.9),rgba(182,243,74,.6),transparent);
  box-shadow:0 0 18px rgba(33,212,232,.6);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding:64px 0 44px}
.footer-brand__mark{display:flex;align-items:center;gap:11px;margin-bottom:16px}
.footer-brand__desc{color:var(--text-3);font-size:14px;max-width:320px;line-height:1.8}
.footer-col h3{font-size:15px;font-weight:700;margin-bottom:18px;color:var(--text)}
.footer-col ul{display:grid;gap:11px}
.footer-col a,.footer-col span{color:var(--text-3);font-size:14px;transition:color .2s}
.footer-col a:hover{color:var(--cyan)}
.footer-bottom{
  border-top:1px solid rgba(130,220,255,.12);
  padding:20px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}
.footer-note{display:flex;gap:16px;flex-wrap:wrap}

/* ============ 移动端底部 Tab ============ */
.mobile-tab{display:none}
@media (max-width:992px){
  .mobile-tab{
    display:grid;
    grid-template-columns:repeat(5,1fr);
    position:fixed;left:0;right:0;bottom:0;z-index:300;
    background:rgba(7,17,31,.92);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    border-top:1px solid var(--border);
    padding:8px 6px calc(8px + env(safe-area-inset-bottom));
  }
  .mtab{
    position:relative;
    display:flex;flex-direction:column;align-items:center;gap:3px;
    padding:6px 2px;border-radius:10px;
    font-size:11px;color:var(--text-3);
    transition:color .2s,background .2s;
  }
  .mtab__ico{display:grid;place-items:center;width:22px;height:22px}
  .mtab__ico svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
  .mtab.is-active{color:var(--green)}
  .mtab.is-active::before{
    content:"";position:absolute;top:-8px;left:50%;transform:translateX(-50%);
    width:26px;height:2px;border-radius:2px;
    background:linear-gradient(90deg,var(--cyan),var(--green));
    box-shadow:0 0 12px rgba(33,212,232,.9);
  }
  .mtab:hover{color:var(--text)}
  body{padding-bottom:76px}
}

/* ============ 响应式 ============ */
@media (max-width:1280px){
  .hero__grid{gap:36px}
  .bento{grid-template-columns:repeat(4,1fr)}
  .b-card,.b-card--wide{grid-column:span 2}
}
@media (max-width:1024px){
  .section{padding:72px 0}
  .main-nav{display:none}
  .header-actions .btn--ghost{display:none}
  .hero{padding:130px 0 72px}
  .hero__grid{grid-template-columns:1fr;gap:40px}
  .hero__sub{max-width:none}
  .stat-bar{grid-template-columns:repeat(2,1fr);gap:16px}
  .timeline{grid-template-columns:repeat(2,1fr);gap:28px}
  .timeline::before{display:none}
  .case-wrap{grid-template-columns:1fr}
  .price-grid{grid-template-columns:1fr;max-width:560px;margin:0 auto}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .cta-band__inner{grid-template-columns:1fr}
  .cta-band__actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .section{padding:56px 0}
  .section--tight{padding:46px 0}
  .hero{padding:112px 0 56px}
  .hero__sub{font-size:16px}
  .login-card{padding:24px 20px}
  .bento{grid-template-columns:1fr;gap:16px}
  .b-card,.b-card--wide{grid-column:span 1}
  .b-card__img{margin:-26px -26px 18px;height:132px}
  .timeline{grid-template-columns:1fr;gap:24px}
  .news-grid{grid-template-columns:1fr}
  .cta-band{padding:34px 22px;border-radius:20px}
  .price{padding:26px 22px}
  .footer-grid{grid-template-columns:1fr;gap:30px;padding:48px 0 34px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .brand__text{font-size:15px}
  .brand__mark{width:32px;height:32px;font-size:15px}
  .header-inner{gap:12px}
  .btn{height:44px;padding:0 18px;font-size:14px}
  .btn--lg{height:48px;padding:0 22px}
  .stat-bar{grid-template-columns:1fr}
  .case-metrics{grid-template-columns:1fr}
  .hero__cta{flex-direction:column;align-items:stretch}
  .hero__cta .btn{width:100%}
  .faq-q{padding:16px 16px;gap:12px}
  .faq-q h3{font-size:15.5px}
  .faq-a__inner{padding:0 16px 18px}
  .sec-head{margin-bottom:30px}
}

/* roulang page: category1 */
:root{
  --bg:#07111F;
  --bg-2:#0B1A2B;
  --panel:rgba(10,25,42,.62);
  --panel-solid:#0E2135;
  --cyan:#21D4E8;
  --lime:#B6F34A;
  --amber:#FFB020;
  --success:#34D399;
  --warning:#FBBF24;
  --error:#F87171;
  --text:#F5FAFF;
  --text-2:#A9BED3;
  --text-3:#6F86A0;
  --line:rgba(130,220,255,.16);
  --line-strong:rgba(33,212,232,.42);
  --radius-lg:20px;
  --radius:16px;
  --radius-sm:12px;
  --radius-btn:11px;
  --shadow:0 20px 60px rgba(0,0,0,.35);
  --shadow-soft:0 10px 30px rgba(0,0,0,.28);
  --glow:0 0 0 1px rgba(255,255,255,.08),0 10px 30px rgba(33,212,232,.28);
  --gap:24px;
  --max:1240px;
  --header-h:72px;
  --tabbar-h:64px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  background-image:
    radial-gradient(900px 520px at 12% -6%, rgba(33,212,232,.16), transparent 62%),
    radial-gradient(760px 460px at 92% 6%, rgba(182,243,74,.10), transparent 60%),
    linear-gradient(180deg,#07111F 0%,#081524 42%,#07111F 100%);
  overflow-x:hidden;
  min-height:100vh;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(130,220,255,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(130,220,255,.055) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(1200px 700px at 50% 0%, #000 0%, transparent 78%);
  -webkit-mask-image:radial-gradient(1200px 700px at 50% 0%, #000 0%, transparent 78%);
}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.2;letter-spacing:.2px;}
h1{font-size:clamp(28px,4.4vw,50px);line-height:1.12;}
h2{font-size:clamp(24px,2.9vw,34px);}
h3{font-size:clamp(18px,1.6vw,21px);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
a{color:var(--cyan);text-decoration:none;transition:color .2s ease,opacity .2s ease;}
a:hover{color:var(--lime);}
img{max-width:100%;display:block;height:auto;}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}
.num,.stat__value,.step__index{font-variant-numeric:tabular-nums;}

.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px;}
main{position:relative;z-index:1;}
.section{padding:88px 0;position:relative;}
.section--tight{padding:64px 0;}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head .eyebrow{margin-bottom:14px;}
.section-head p{margin-top:16px;color:var(--text-2);font-size:16.5px;}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--cyan),var(--lime));}
.muted{color:var(--text-2);}
.small{font-size:13.5px;color:var(--text-3);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;white-space:nowrap;
  transition:transform .2s ease,box-shadow .25s ease,background .25s ease,border-color .25s ease,color .2s ease,opacity .2s ease;
}
.btn--primary{
  color:#04121C;
  background:linear-gradient(120deg,var(--cyan),var(--lime));
  box-shadow:0 0 0 1px rgba(255,255,255,.08),0 10px 30px rgba(33,212,232,.28);
}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,255,255,.14),0 16px 40px rgba(33,212,232,.42);color:#04121C;}
.btn--ghost{
  color:var(--text);
  background:rgba(10,25,42,.62);
  border-color:var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.btn--ghost:hover{border-color:var(--line-strong);color:var(--lime);transform:translateY(-2px);}
.btn--amber{color:#231601;background:linear-gradient(120deg,var(--amber),#FFD37A);box-shadow:0 10px 30px rgba(255,176,32,.26);}
.btn--amber:hover{color:#231601;transform:translateY(-2px);}
.btn--sm{padding:9px 16px;font-size:14px;border-radius:10px;}
.btn--lg{padding:15px 30px;font-size:16px;}
.btn[disabled],.btn.is-disabled{opacity:.5;pointer-events:none;}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
  border:1px solid var(--line);
  background:rgba(33,212,232,.08);color:var(--cyan);
}
.badge--lime{background:rgba(182,243,74,.10);border-color:rgba(182,243,74,.28);color:var(--lime);}
.badge--amber{background:rgba(255,176,32,.12);border-color:rgba(255,176,32,.30);color:var(--amber);}
.badge--muted{background:rgba(130,220,255,.05);border-color:var(--line);color:var(--text-2);}
.badge-row{display:flex;flex-wrap:wrap;gap:10px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,17,31,.82);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  height:var(--header-h);
  display:flex;align-items:center;gap:28px;
}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0;color:var(--text);}
.brand:hover{color:var(--text);}
.brand__mark{
  width:36px;height:36px;border-radius:11px;flex-shrink:0;
  display:grid;place-items:center;
  font-size:17px;font-weight:800;color:#04121C;
  background:linear-gradient(135deg,var(--cyan),var(--lime));
  box-shadow:0 8px 22px rgba(33,212,232,.35);
}
.brand__text{font-size:17px;font-weight:800;letter-spacing:.4px;white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-link{
  position:relative;
  padding:10px 13px;border-radius:10px;
  font-size:14.5px;font-weight:600;color:var(--text-2);
  transition:color .2s ease,background .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:13px;right:13px;bottom:4px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--lime));
  opacity:0;transform:scaleX(.4);transition:opacity .25s ease,transform .25s ease;
}
.nav-link:hover{color:var(--text);background:rgba(33,212,232,.07);}
.nav-link.is-active{color:var(--text);}
.nav-link.is-active::after{opacity:1;transform:scaleX(1);box-shadow:0 0 14px rgba(33,212,232,.7);}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;}

/* ---------- 面包屑 ---------- */
.crumb{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  font-size:13.5px;color:var(--text-3);
  padding-top:26px;
}
.crumb a{color:var(--text-2);}
.crumb a:hover{color:var(--lime);}
.crumb span.sep{color:var(--text-3);opacity:.7;}
.crumb .current{color:var(--cyan);font-weight:600;}

/* ---------- 分类 Hero ---------- */
.hero-cat{
  position:relative;
  padding:34px 0 64px;
  border-bottom:1px solid rgba(130,220,255,.10);
  overflow:hidden;
}
.hero-cat__bg{
  position:absolute;inset:0;z-index:-1;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
  opacity:.30;
}
.hero-cat__bg::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(760px 420px at 16% 20%, rgba(33,212,232,.22), transparent 66%),
    linear-gradient(180deg, rgba(7,17,31,.72), rgba(7,17,31,.96));
}
.hero-cat__grid{
  display:grid;grid-template-columns:1.35fr .9fr;gap:44px;align-items:center;margin-top:26px;
}
.hero-cat h1{margin:16px 0 18px;}
.hero-cat h1 em{font-style:normal;background:linear-gradient(100deg,var(--cyan),var(--lime));-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-cat__lead{color:var(--text-2);font-size:17px;max-width:640px;}
.hero-cat__cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-cat__meta{display:flex;flex-wrap:wrap;gap:26px;margin-top:32px;padding-top:24px;border-top:1px dashed rgba(130,220,255,.18);}
.hero-cat__meta div{min-width:120px;}
.hero-cat__meta strong{display:block;font-size:24px;font-weight:800;color:var(--lime);font-variant-numeric:tabular-nums;}
.hero-cat__meta span{font-size:13px;color:var(--text-3);}

/* 入口资料卡 */
.entry-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  padding:26px;
}
.entry-card__top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:20px;}
.entry-card__top h2{font-size:18px;}
.entry-list{display:grid;gap:14px;}
.entry-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:13px 14px;border-radius:var(--radius-sm);
  background:rgba(7,17,31,.55);border:1px solid rgba(130,220,255,.10);
  transition:border-color .2s ease,transform .2s ease;
}
.entry-list li:hover{border-color:var(--line-strong);transform:translateX(2px);}
.entry-list .dot{
  width:26px;height:26px;flex-shrink:0;border-radius:8px;
  display:grid;place-items:center;font-size:12px;font-weight:800;color:#04121C;
  background:linear-gradient(135deg,var(--cyan),var(--lime));
}
.entry-list strong{display:block;font-size:14.5px;font-weight:700;}
.entry-list p{font-size:13px;color:var(--text-3);line-height:1.6;margin-top:2px;}

/* ---------- Bento 网格 ---------- */
.bento{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:var(--gap);
}
.bento__item{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-soft);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  padding:26px;
  overflow:hidden;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.bento__item:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:0 24px 64px rgba(0,0,0,.42);}
.bento__item::after{
  content:"";position:absolute;top:0;left:0;width:100%;height:2px;
  background:linear-gradient(90deg,rgba(33,212,232,.9),rgba(182,243,74,.55),transparent 70%);
  opacity:.55;
}
.bento__item h3{margin-bottom:10px;}
.bento__item p{color:var(--text-2);font-size:15px;}
.bento__item .icon{
  width:44px;height:44px;border-radius:13px;display:grid;place-items:center;
  margin-bottom:16px;font-size:20px;color:#04121C;
  background:linear-gradient(135deg,var(--cyan),var(--lime));
  box-shadow:0 10px 26px rgba(33,212,232,.28);
}
.bento__item--wide{grid-column:span 7;}
.bento__item--std{grid-column:span 5;}
.bento__item--third{grid-column:span 4;}
.bento__item--half{grid-column:span 6;}
.bento__item--media{padding:0;}
.bento__item--media img{height:220px;width:100%;object-fit:cover;opacity:.85;}
.bento__item--media .media-body{padding:24px 26px 26px;}
.bento__item--media::after{display:none;}
.feature-list{display:grid;gap:10px;margin-top:16px;}
.feature-list li{display:flex;gap:9px;align-items:flex-start;font-size:14.5px;color:var(--text-2);}
.feature-list li::before{
  content:"";width:7px;height:7px;margin-top:9px;border-radius:50%;flex-shrink:0;
  background:var(--cyan);box-shadow:0 0 12px rgba(33,212,232,.8);
}
.bento__item--accent{
  background:linear-gradient(135deg,rgba(33,212,232,.14),rgba(182,243,74,.09));
  border-color:rgba(33,212,232,.32);
}

/* ---------- 步骤流 ---------- */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;margin-top:12px;}
.step{
  position:relative;
  padding:24px 20px;
  border-radius:var(--radius);
  background:rgba(10,25,42,.55);
  border:1px solid var(--line);
  transition:transform .25s ease,border-color .25s ease,background .25s ease;
}
.step:hover{transform:translateY(-3px);border-color:var(--line-strong);background:rgba(10,25,42,.75);}
.step::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;border-radius:3px 0 0 3px;
  background:linear-gradient(180deg,var(--cyan),var(--lime));
  opacity:.85;
}
.step__index{
  display:inline-block;font-size:13px;font-weight:800;letter-spacing:.12em;
  color:var(--cyan);margin-bottom:12px;
}
.step h3{font-size:17px;margin-bottom:8px;}
.step p{font-size:14px;color:var(--text-2);}

/* ---------- 对比卡 ---------- */
.compare{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);}
.compare__card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:28px 24px;
  box-shadow:var(--shadow-soft);
  display:flex;flex-direction:column;
  transition:transform .25s ease,border-color .25s ease;
}
.compare__card:hover{transform:translateY(-3px);border-color:var(--line-strong);}
.compare__card--best{
  border-color:rgba(255,176,32,.42);
  background:linear-gradient(180deg,rgba(255,176,32,.10),rgba(10,25,42,.68));
}
.compare__card h3{margin-bottom:6px;}
.compare__card .tagline{font-size:13.5px;color:var(--text-3);margin-bottom:18px;}
.compare__list{display:grid;gap:11px;margin-bottom:22px;}
.compare__list li{display:flex;gap:9px;font-size:14.5px;color:var(--text-2);}
.compare__list li::before{content:"✓";color:var(--lime);font-weight:800;}
.compare__card .btn{margin-top:auto;width:100%;}

/* ---------- 数据看板 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap);}
.stat{
  padding:26px 22px;border-radius:var(--radius);
  background:rgba(10,25,42,.6);
  border:1px solid var(--line);
  text-align:left;
}
.stat__value{font-size:34px;font-weight:800;background:linear-gradient(100deg,var(--cyan),var(--lime));-webkit-background-clip:text;background-clip:text;color:transparent;}
.stat__label{font-size:14px;color:var(--text-2);margin-top:6px;}
.stat__note{font-size:12.5px;color:var(--text-3);margin-top:10px;}

/* ---------- 图文交错 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;}
.split--reverse .split__media{order:2;}
.split__media{
  border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  position:relative;
}
.split__media img{width:100%;height:340px;object-fit:cover;}
.split__media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(160deg,rgba(7,17,31,.15),rgba(7,17,31,.7));
}
.split__media .media-tag{
  position:absolute;left:18px;bottom:18px;z-index:2;
}
.split__body h2{margin-bottom:16px;}
.split__body p{color:var(--text-2);margin-bottom:18px;}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:14px;max-width:920px;margin:0 auto;}
.faq-item{
  background:rgba(10,25,42,.6);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  transition:border-color .25s ease,background .25s ease;
}
.faq-item.is-open{border-color:var(--line-strong);background:rgba(10,25,42,.85);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 22px;text-align:left;position:relative;
}
.faq-q h3{font-size:16.5px;font-weight:700;}
.faq-q .chev{
  width:26px;height:26px;flex-shrink:0;border-radius:8px;
  display:grid;place-items:center;font-size:13px;color:var(--cyan);
  border:1px solid var(--line);background:rgba(33,212,232,.08);
  transition:transform .25s ease,background .25s ease;
}
.faq-item.is-open .faq-q .chev{transform:rotate(45deg);background:rgba(182,243,74,.14);color:var(--lime);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease;}
.faq-a__inner{
  padding:0 22px 22px 22px;font-size:15px;color:var(--text-2);line-height:1.8;
  border-left:2px solid transparent;
}
.faq-item.is-open .faq-a__inner{border-left-color:var(--cyan);}

/* ---------- CTA ---------- */
.cta{
  position:relative;
  border-radius:24px;
  padding:56px 44px;
  overflow:hidden;
  border:1px solid rgba(130,220,255,.20);
  background:linear-gradient(135deg,rgba(33,212,232,.16),rgba(182,243,74,.10) 55%,rgba(10,25,42,.9));
  box-shadow:var(--shadow);
}
.cta::before{
  content:"";position:absolute;inset:0;z-index:0;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;opacity:.20;
}
.cta__inner{position:relative;z-index:1;display:grid;grid-template-columns:1.4fr .9fr;gap:40px;align-items:center;}
.cta h2{margin-bottom:14px;}
.cta p{color:var(--text-2);max-width:620px;}
.cta__actions{display:flex;flex-direction:column;gap:12px;}
.cta__actions .btn{width:100%;}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:20px;
  background:rgba(6,14,26,.92);
  border-top:1px solid rgba(33,212,232,.30);
  padding:56px 0 26px;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(33,212,232,.85),rgba(182,243,74,.55),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;}
.footer-brand__mark{display:flex;align-items:center;gap:11px;margin-bottom:16px;}
.footer-brand__desc{color:var(--text-3);font-size:14px;line-height:1.8;max-width:360px;}
.footer-col h3{font-size:15.5px;margin-bottom:16px;color:var(--text);}
.footer-col ul{display:grid;gap:11px;}
.footer-col a{color:var(--text-2);font-size:14px;}
.footer-col a:hover{color:var(--lime);}
.footer-col span{color:var(--text-3);font-size:14px;}
.footer-bottom{
  margin-top:44px;padding-top:22px;
  border-top:1px solid rgba(130,220,255,.12);
  display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  color:var(--text-3);font-size:13px;
}
.footer-note{display:flex;gap:18px;flex-wrap:wrap;}

/* ---------- 移动底部 Tab ---------- */
.mobile-tabbar{display:none;}
@media (max-width:992px){
  .main-nav{display:none;}
  .header-actions{display:none;}
  .header-inner{justify-content:space-between;}
  body{padding-bottom:calc(var(--tabbar-h) + env(safe-area-inset-bottom,0px));}
  .mobile-tabbar{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    position:fixed;left:0;right:0;bottom:0;z-index:80;
    height:calc(var(--tabbar-h) + env(safe-area-inset-bottom,0px));
    padding-bottom:env(safe-area-inset-bottom,0px);
    background:rgba(7,17,31,.94);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    border-top:1px solid var(--line);
  }
  .tabbar__item{
    position:relative;
    display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
    font-size:11.5px;font-weight:600;color:var(--text-3);
    transition:color .2s ease;
  }
  .tabbar__item svg{width:20px;height:20px;}
  .tabbar__item.is-active{color:var(--lime);}
  .tabbar__item.is-active::before{
    content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
    width:34px;height:2px;border-radius:2px;
    background:linear-gradient(90deg,var(--cyan),var(--lime));
    box-shadow:0 0 14px rgba(33,212,232,.85);
  }
}

/* ---------- 响应式 ---------- */
@media (max-width:1280px){
  .hero-cat__grid{gap:32px;}
}
@media (max-width:1024px){
  .section{padding:72px 0;}
  .hero-cat__grid{grid-template-columns:1fr;}
  .bento__item--wide,.bento__item--std,.bento__item--half{grid-column:span 12;}
  .bento__item--third{grid-column:span 6;}
  .steps{grid-template-columns:repeat(2,1fr);}
  .compare{grid-template-columns:1fr;}
  .stats{grid-template-columns:repeat(2,1fr);}
  .split{grid-template-columns:1fr;gap:28px;}
  .split--reverse .split__media{order:0;}
  .cta__inner{grid-template-columns:1fr;gap:26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:768px){
  .container{padding:0 18px;}
  .section{padding:56px 0;}
  .section--tight{padding:44px 0;}
  .hero-cat{padding:20px 0 48px;}
  .hero-cat__meta{gap:18px;}
  .hero-cat__meta strong{font-size:21px;}
  .bento__item{padding:22px;}
  .bento__item--third{grid-column:span 12;}
  .steps{grid-template-columns:1fr;}
  .stats{grid-template-columns:1fr;}
  .cta{padding:36px 22px;border-radius:18px;}
  .faq-q{padding:17px 18px;}
  .faq-a__inner{padding:0 18px 20px 18px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .brand__text{font-size:15px;}
  .hero-cat__cta .btn{width:100%;}
  .split__media img{height:230px;}
  .bento__item--media img{height:180px;}
}

/* roulang page: article */
:root{
  --bg:#07111F;
  --bg-soft:#0B1A2B;
  --panel:rgba(10,25,42,.62);
  --panel-solid:#0E2033;
  --line:rgba(130,220,255,.16);
  --line-strong:rgba(130,220,255,.34);
  --cyan:#21D4E8;
  --green:#B6F34A;
  --amber:#FFB020;
  --ok:#34D399;
  --warn:#FBBF24;
  --err:#F87171;
  --text:#F5FAFF;
  --text-2:#A9BED3;
  --text-3:#6F86A0;
  --r-lg:20px;
  --r:16px;
  --r-sm:12px;
  --r-xs:10px;
  --pill:999px;
  --shadow:0 20px 60px rgba(0,0,0,.35);
  --shadow-soft:0 10px 30px rgba(0,0,0,.28);
  --glow:0 10px 30px rgba(33,212,232,.28);
  --max:1240px;
  --gap:24px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:
    radial-gradient(900px 520px at 12% -8%, rgba(33,212,232,.18), transparent 62%),
    radial-gradient(760px 460px at 92% 6%, rgba(182,243,74,.12), transparent 60%),
    linear-gradient(180deg,#07111F 0%,#0B1A2B 46%,#07111F 100%);
  background-attachment:fixed;
  min-height:100vh;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(130,220,255,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(130,220,255,.055) 1px, transparent 1px);
  background-size:64px 64px,64px 64px;
  mask-image:radial-gradient(ellipse at 50% 0%, rgba(0,0,0,.9), transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse at 50% 0%, rgba(0,0,0,.9), transparent 78%);
}
img{max-width:100%;display:block;border:0}
a{color:var(--cyan);text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{color:var(--green)}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.24;letter-spacing:.2px}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px;position:relative;z-index:1}
.tnum{font-variant-numeric:tabular-nums}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(7,17,31,.82);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  height:72px;
  display:flex;
  align-items:center;
  gap:24px;
}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);flex:0 0 auto}
.brand:hover{color:var(--text)}
.brand__mark{
  width:36px;height:36px;
  display:grid;place-items:center;
  border-radius:12px;
  font-weight:800;font-size:17px;
  color:#04121C;
  background:linear-gradient(135deg,var(--cyan),var(--green));
  box-shadow:0 8px 22px rgba(33,212,232,.34);
}
.brand__text{font-size:17px;font-weight:800;letter-spacing:.4px;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  position:relative;
  display:inline-block;
  padding:10px 14px;
  font-size:14.5px;
  font-weight:600;
  color:var(--text-2);
  border-radius:var(--r-xs);
  white-space:nowrap;
}
.nav-link:hover{color:var(--text);background:rgba(33,212,232,.08)}
.nav-link.is-active{color:var(--text);background:rgba(33,212,232,.10)}
.nav-link.is-active::after{
  content:"";
  position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--green));
  box-shadow:0 0 12px rgba(33,212,232,.75);
}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  font-size:15px;
  font-weight:600;
  border-radius:var(--r-sm);
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn--primary{
  color:#04121C;
  background:linear-gradient(135deg,var(--cyan),var(--green));
  box-shadow:0 0 0 1px rgba(255,255,255,.08),var(--glow);
}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,255,255,.14),0 16px 40px rgba(33,212,232,.42);color:#04121C}
.btn--ghost{
  color:var(--text);
  background:rgba(10,25,42,.5);
  border-color:var(--line-strong);
}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-2px)}
.btn--sm{padding:9px 16px;font-size:13.5px;border-radius:var(--r-xs)}
.btn--block{width:100%}
.btn:active{transform:translateY(0) scale(.99)}
.btn.is-loading{opacity:.85;pointer-events:none}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none}

/* ============ 通用板块 ============ */
.section{padding:80px 0;position:relative}
.section--tight{padding:56px 0}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{font-size:32px;margin-bottom:14px}
.section-head p{color:var(--text-2);font-size:16px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;
  font-size:12.5px;font-weight:700;letter-spacing:1px;
  color:var(--cyan);
  border:1px solid var(--line-strong);
  border-radius:var(--pill);
  background:rgba(33,212,232,.08);
  margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--green);box-shadow:0 0 10px var(--green)}

/* ============ 文章头部 ============ */
.article-hero{
  position:relative;
  padding:64px 0 40px;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.article-hero__bg{
  position:absolute;inset:0;
  background-image:linear-gradient(180deg,rgba(7,17,31,.72),rgba(7,17,31,.94)),url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center;
  opacity:.9;
}
.article-hero::after{
  content:"";
  position:absolute;left:50%;top:-140px;width:760px;height:420px;
  transform:translateX(-50%);
  background:radial-gradient(closest-side,rgba(33,212,232,.22),transparent 72%);
  pointer-events:none;
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13.5px;color:var(--text-3);
  margin-bottom:20px;
  position:relative;z-index:1;
}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb span.sep{color:var(--text-3);opacity:.7}
.article-title{
  font-size:44px;
  line-height:1.12;
  max-width:920px;
  margin-bottom:20px;
  position:relative;z-index:1;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  position:relative;z-index:1;
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;
  font-size:12.5px;font-weight:700;
  border-radius:var(--pill);
  border:1px solid var(--line);
  background:rgba(10,25,42,.6);
  color:var(--text-2);
}
.badge--cyan{color:var(--cyan);border-color:rgba(33,212,232,.4);background:rgba(33,212,232,.1)}
.badge--green{color:#0B1A2B;background:linear-gradient(135deg,var(--green),var(--cyan));border-color:transparent}
.badge--amber{color:#2A1B00;background:var(--amber);border-color:transparent}

/* ============ 文章主体 ============ */
.article-wrap{padding:56px 0 72px}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 330px;
  gap:40px;
  align-items:start;
}
.article-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  padding:40px;
}
.article-body{max-width:820px}
.article-body > * + *{margin-top:20px}
.article-content{font-size:16.5px;line-height:1.82;color:var(--text-2)}
.article-content p{margin:0 0 20px;color:var(--text-2)}
.article-content h2{
  font-size:30px;color:var(--text);
  margin:38px 0 18px;padding-left:16px;position:relative;
}
.article-content h2::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:3px;
  background:linear-gradient(180deg,var(--cyan),var(--green));
  box-shadow:0 0 14px rgba(33,212,232,.6);
}
.article-content h3{font-size:21px;color:var(--text);margin:30px 0 14px}
.article-content h4{font-size:18px;color:var(--text);margin:24px 0 12px}
.article-content ul,.article-content ol{margin:0 0 20px;padding-left:4px}
.article-content ul li,.article-content ol li{
  position:relative;
  padding-left:26px;
  margin-bottom:10px;
  color:var(--text-2);
}
.article-content ul li::before{
  content:"";
  position:absolute;left:6px;top:.72em;
  width:8px;height:8px;border-radius:50%;
  background:linear-gradient(135deg,var(--cyan),var(--green));
}
.article-content ol{counter-reset:li}
.article-content ol li{counter-increment:li}
.article-content ol li::before{
  content:counter(li);
  position:absolute;left:0;top:.15em;
  width:20px;height:20px;border-radius:6px;
  font-size:12px;font-weight:800;color:#04121C;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--cyan),var(--green));
}
.article-content blockquote{
  margin:26px 0;
  padding:20px 24px;
  border-left:3px solid var(--cyan);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  background:rgba(33,212,232,.08);
  color:var(--text);
  font-size:16px;
}
.article-content img{
  width:100%;
  border-radius:var(--r);
  border:1px solid var(--line);
  box-shadow:var(--shadow-soft);
  margin:26px 0;
}
.article-content a{color:var(--cyan);border-bottom:1px dashed rgba(33,212,232,.5)}
.article-content a:hover{color:var(--green);border-bottom-color:rgba(182,243,74,.6)}
.article-content code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:14px;
  padding:2px 7px;
  border-radius:6px;
  color:var(--green);
  background:rgba(182,243,74,.1);
  border:1px solid rgba(182,243,74,.22);
}
.article-content pre{
  margin:24px 0;
  padding:20px 22px;
  border-radius:var(--r);
  background:#05101C;
  border:1px solid var(--line);
  overflow-x:auto;
  font-size:14px;
  line-height:1.7;
}
.article-content pre code{padding:0;border:0;background:none;color:var(--text-2)}
.article-content table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
.article-content th,.article-content td{
  padding:12px 14px;text-align:left;
  border-bottom:1px solid var(--line);
  color:var(--text-2);
}
.article-content th{color:var(--text);background:rgba(33,212,232,.07);font-weight:700}
.article-content hr{border:0;height:1px;background:var(--line);margin:34px 0}

/* 空态 */
.empty-state{
  text-align:center;
  padding:64px 28px;
  border:1px dashed var(--line-strong);
  border-radius:var(--r-lg);
  background:rgba(10,25,42,.45);
}
.empty-state__icon{
  width:64px;height:64px;margin:0 auto 20px;
  display:grid;place-items:center;
  border-radius:var(--r);
  color:var(--cyan);
  background:rgba(33,212,232,.1);
  border:1px solid var(--line-strong);
}
.empty-state h2{font-size:24px;margin-bottom:12px}
.empty-state p{color:var(--text-2);margin-bottom:24px}

/* ============ 侧栏 ============ */
.side-stack{display:grid;gap:24px;position:sticky;top:96px}
.side-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r);
  box-shadow:var(--shadow);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  padding:26px;
}
.side-card h3{font-size:18px;margin-bottom:16px;display:flex;align-items:center;gap:10px}
.side-card h3::before{content:"";width:6px;height:18px;border-radius:3px;background:linear-gradient(180deg,var(--cyan),var(--green))}
.side-list{display:grid;gap:12px}
.side-item{
  display:flex;gap:12px;align-items:flex-start;
  padding:12px;
  border-radius:var(--r-sm);
  border:1px solid transparent;
  background:rgba(7,17,31,.5);
  transition:border-color .2s ease,transform .2s ease,background .2s ease;
}
.side-item:hover{border-color:var(--line-strong);transform:translateY(-2px);background:rgba(33,212,232,.07)}
.side-item img{width:64px;height:52px;object-fit:cover;border-radius:10px;flex:0 0 auto;border:1px solid var(--line)}
.side-item strong{display:block;font-size:14.5px;color:var(--text);line-height:1.5;font-weight:700}
.side-item span{display:block;font-size:12.5px;color:var(--text-3);margin-top:6px}
.toc-list{display:grid;gap:10px;font-size:14.5px}
.toc-list a{color:var(--text-2);display:flex;gap:10px;align-items:center;padding:6px 0}
.toc-list a::before{content:"";width:14px;height:1px;background:var(--line-strong);flex:0 0 auto}
.toc-list a:hover{color:var(--cyan)}
.kv{display:grid;gap:12px;font-size:14px}
.kv div{display:flex;justify-content:space-between;gap:12px;padding-bottom:10px;border-bottom:1px dashed rgba(130,220,255,.14)}
.kv div:last-child{border-bottom:0;padding-bottom:0}
.kv span:first-child{color:var(--text-3)}
.kv span:last-child{color:var(--text);font-weight:600}

/* ============ 推荐卡片 ============ */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap)}
.post-card{
  display:flex;flex-direction:column;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
  box-shadow:var(--shadow);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.post-card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:0 24px 64px rgba(0,0,0,.42)}
.post-card__media{position:relative;aspect-ratio:16/9;overflow:hidden}
.post-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.post-card:hover .post-card__media img{transform:scale(1.05)}
.post-card__media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,17,31,0),rgba(7,17,31,.72))}
.post-card__tag{position:absolute;left:14px;top:14px;z-index:2}
.post-card__body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1}
.post-card__body h3{font-size:18.5px;line-height:1.45}
.post-card__body p{font-size:14.5px;color:var(--text-2)}
.post-card__foot{margin-top:auto;display:flex;justify-content:space-between;align-items:center;font-size:12.5px;color:var(--text-3)}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:14px;max-width:900px}
.faq-item{
  border:1px solid var(--line);
  border-radius:var(--r);
  background:rgba(10,25,42,.5);
  overflow:hidden;
  transition:border-color .22s ease,background .22s ease;
}
.faq-item.is-open{border-color:var(--line-strong);background:rgba(10,25,42,.78)}
.faq-item.is-open::before{content:"";display:block;height:3px;background:linear-gradient(90deg,var(--cyan),var(--green))}
.faq-q{
  width:100%;
  display:flex;justify-content:space-between;align-items:center;gap:16px;
  padding:20px 22px;
  background:none;border:0;
  color:var(--text);
  font-size:17px;font-weight:700;
  text-align:left;cursor:pointer;
}
.faq-q:hover{color:var(--cyan)}
.faq-q .ico{
  flex:0 0 auto;
  width:26px;height:26px;border-radius:8px;
  display:grid;place-items:center;
  border:1px solid var(--line-strong);
  color:var(--cyan);font-size:16px;line-height:1;
  transition:transform .22s ease,background .22s ease;
}
.faq-item.is-open .faq-q .ico{transform:rotate(45deg);background:rgba(33,212,232,.14)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a__inner{padding:0 22px 22px 22px;color:var(--text-2);font-size:15px;line-height:1.78}

/* ============ CTA ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  border-radius:var(--r-lg);
  border:1px solid var(--line-strong);
  background-image:linear-gradient(120deg,rgba(7,17,31,.9),rgba(11,26,43,.78)),url("/assets/images/backpic/back-3.png");
  background-size:cover;
  background-position:center;
  padding:56px 48px;
  box-shadow:var(--shadow);
}
.cta-band::after{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;
  background:radial-gradient(closest-side,rgba(182,243,74,.22),transparent 70%);
  pointer-events:none;
}
.cta-band h2{font-size:32px;margin-bottom:14px;position:relative;z-index:1}
.cta-band p{color:var(--text-2);max-width:640px;margin-bottom:28px;position:relative;z-index:1}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;position:relative;z-index:1}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:20px;
  border-top:1px solid rgba(33,212,232,.35);
  background:linear-gradient(180deg,rgba(7,17,31,.6),rgba(5,13,24,.96));
  padding:64px 0 32px;
  position:relative;
  z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:36px;
}
.footer-brand__mark{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand__desc{color:var(--text-3);font-size:14px;line-height:1.8;max-width:360px}
.footer-col h3{font-size:15px;margin-bottom:18px;color:var(--text)}
.footer-col ul{display:grid;gap:12px}
.footer-col li{font-size:14px;color:var(--text-3)}
.footer-col a{color:var(--text-2)}
.footer-col a:hover{color:var(--cyan)}
.footer-bottom{
  margin-top:44px;padding-top:22px;
  border-top:1px solid rgba(130,220,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
.footer-note{display:flex;flex-wrap:wrap;gap:16px}

/* ============ 移动底部 Tab ============ */
.mobile-tab{display:none}
@media (max-width:992px){
  .mobile-tab{
    display:grid;
    grid-template-columns:repeat(5,1fr);
    position:fixed;left:0;right:0;bottom:0;z-index:80;
    height:64px;
    padding-bottom:env(safe-area-inset-bottom);
    background:rgba(7,17,31,.94);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    border-top:1px solid var(--line);
  }
  .mobile-tab a{
    display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
    font-size:11px;font-weight:600;color:var(--text-3);position:relative;
  }
  .mobile-tab a svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
  .mobile-tab a.is-active{color:var(--green)}
  .mobile-tab a.is-active::before{
    content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
    width:26px;height:3px;border-radius:0 0 3px 3px;
    background:linear-gradient(90deg,var(--cyan),var(--green));
    box-shadow:0 0 12px rgba(33,212,232,.8);
  }
  body{padding-bottom:72px}
}

/* ============ 响应式 ============ */
@media (max-width:1280px){
  .article-layout{grid-template-columns:minmax(0,1fr) 300px;gap:32px}
}
@media (max-width:1024px){
  .article-title{font-size:38px}
  .article-layout{grid-template-columns:1fr}
  .side-stack{position:static}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:992px){
  .main-nav{display:none}
  .header-actions{margin-left:auto}
  .section{padding:60px 0}
  .section-head h2{font-size:27px}
  .article-card{padding:26px 20px;border-radius:var(--r)}
  .cta-band{padding:40px 24px}
  .cta-band h2{font-size:26px}
}
@media (max-width:768px){
  .article-title{font-size:30px}
  .article-hero{padding:40px 0 32px}
  .section-head h2{font-size:24px}
  .article-content h2{font-size:24px}
  .article-content h3{font-size:19px}
  .article-content{font-size:16px}
  .grid-3{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .header-inner{height:64px;gap:12px}
  .brand__text{font-size:15px}
  .container{padding:0 16px}
}
@media (max-width:520px){
  .header-actions .btn--ghost{display:none}
  .article-title{font-size:26px;line-height:1.28}
  .btn{padding:11px 16px;font-size:14px}
  .cta-actions .btn{width:100%}
  .article-meta{gap:8px}
}

/* roulang page: category2 */
:root{
  --bg:#07111F;
  --bg-2:#0B1A2B;
  --cyan:#21D4E8;
  --green:#B6F34A;
  --amber:#FFB020;
  --ok:#34D399;
  --warn:#FBBF24;
  --err:#F87171;
  --text:#F5FAFF;
  --text-2:#A9BED3;
  --muted:#6F86A0;
  --line:rgba(130,220,255,.16);
  --line-strong:rgba(130,220,255,.34);
  --card:rgba(10,25,42,.62);
  --card-2:rgba(11,26,43,.9);
  --radius-lg:20px;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 20px 60px rgba(0,0,0,.35);
  --glow:0 10px 30px rgba(33,212,232,.28);
  --gap-section:96px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:
    radial-gradient(60% 50% at 82% -8%,rgba(33,212,232,.14),transparent 60%),
    radial-gradient(48% 42% at 6% 12%,rgba(182,243,74,.10),transparent 62%),
    linear-gradient(180deg,#07111F 0%,#081426 48%,#07111F 100%);
  background-attachment:fixed;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(130,220,255,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(130,220,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(80% 60% at 50% 30%,#000 20%,transparent 92%);
  -webkit-mask-image:radial-gradient(80% 60% at 50% 30%,#000 20%,transparent 92%);
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .22s ease,border-color .22s ease,background .22s ease}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
h1{font-size:clamp(28px,4.4vw,52px);line-height:1.14;font-weight:800;letter-spacing:-.01em}
h2{font-size:clamp(24px,3vw,34px);line-height:1.24;font-weight:800;letter-spacing:-.005em}
h3{font-size:clamp(18px,1.6vw,22px);line-height:1.4;font-weight:700}
p{color:var(--text-2)}
strong{color:var(--text);font-weight:700}
::selection{background:rgba(33,212,232,.35);color:#fff}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:6px}
.container{width:min(1240px,100% - 40px);margin-inline:auto;position:relative;z-index:2}
.section{padding:var(--gap-section) 0}
.section--tight{padding:64px 0}
.section__head{max-width:760px;margin-bottom:44px}
.section__head p{margin-top:14px;font-size:16.5px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;font-weight:600;
  color:var(--cyan);text-transform:uppercase;
  padding:6px 14px;border-radius:999px;
  border:1px solid var(--line);background:rgba(33,212,232,.08);
  margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--green);box-shadow:0 0 10px var(--green)}

/* 顶部导航 */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;height:72px;
  background:rgba(7,17,31,.84);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.header-inner{height:72px;display:flex;align-items:center;gap:26px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;flex-shrink:0}
.brand__mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--cyan),var(--green));
  color:#04121F;font-size:17px;font-weight:800;
  box-shadow:0 0 0 1px rgba(255,255,255,.12),0 8px 24px rgba(33,212,232,.32);
}
.brand__text{font-size:16px;letter-spacing:.01em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;padding:10px 14px;border-radius:10px;
  font-size:15px;color:var(--text-2);transition:all .22s ease;
}
.nav-link:hover{color:var(--text);background:rgba(33,212,232,.09)}
.nav-link.is-active{color:var(--text)}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:1px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--green));
  box-shadow:0 0 12px rgba(33,212,232,.9);
}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:12px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1.2;white-space:nowrap;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
}
.btn--sm{padding:9px 16px;font-size:14px;border-radius:10px}
.btn--primary{
  background:linear-gradient(135deg,#21D4E8,#B6F34A);color:#04121F;
  box-shadow:0 0 0 1px rgba(255,255,255,.08),var(--glow);
}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,255,255,.16),0 16px 38px rgba(33,212,232,.42)}
.btn--primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(255,255,255,.1),0 6px 18px rgba(33,212,232,.3)}
.btn--ghost{
  background:rgba(10,25,42,.6);border-color:var(--line-strong);color:var(--text);
  backdrop-filter:blur(10px);
}
.btn--ghost:hover{border-color:var(--cyan);transform:translateY(-2px);box-shadow:0 10px 28px rgba(33,212,232,.18)}
.btn--block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}

/* 面包屑 */
.breadcrumb{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--muted);margin-bottom:20px;flex-wrap:wrap}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb span{color:var(--muted)}

/* 分类页 Hero */
.page-hero{position:relative;overflow:hidden;padding:132px 0 68px;border-bottom:1px solid var(--line)}
.page-hero__bg{position:absolute;inset:0;background-position:center;background-size:cover;opacity:.3}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(80% 120% at 10% -10%,rgba(33,212,232,.22),transparent 58%),
    radial-gradient(60% 90% at 96% 10%,rgba(182,243,74,.12),transparent 60%),
    linear-gradient(180deg,rgba(7,17,31,.58) 0%,rgba(7,17,31,.94) 72%,#07111F 100%);
}
.page-hero .container{position:relative;z-index:3}
.page-hero h1{max-width:920px}
.page-hero__lead{max-width:700px;margin-top:20px;font-size:17px;color:var(--text-2)}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 15px;border-radius:999px;font-size:13.5px;font-weight:600;
  color:var(--text-2);background:rgba(10,25,42,.66);
  border:1px solid var(--line);backdrop-filter:blur(10px);
}
.chip i{color:var(--cyan);font-size:12px}
.chip--green i{color:var(--green)}
.chip--amber i{color:var(--amber)}

/* 数据小条 */
.stat-strip{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:18px;margin-top:38px;
}
.stat-strip .stat{
  padding:18px 20px;border-radius:var(--radius);
  background:var(--card);border:1px solid var(--line);
  backdrop-filter:blur(14px);box-shadow:var(--shadow);
}
.stat b{display:block;font-size:24px;font-weight:800;color:var(--text);font-variant-numeric:tabular-nums}
.stat span{display:block;margin-top:4px;font-size:13px;color:var(--muted)}

/* 介绍 */
.intro-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:start}
.intro-card{
  padding:30px;border-radius:var(--radius-lg);
  background:var(--card);border:1px solid var(--line);
  backdrop-filter:blur(16px);box-shadow:var(--shadow);
}
.intro-card h3{margin-bottom:14px}
.intro-list{margin-top:22px;display:grid;gap:14px}
.intro-list li{display:flex;gap:12px;font-size:15px;color:var(--text-2)}
.intro-list i{color:var(--green);margin-top:5px;font-size:13px}
.intro-figure{
  border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow);position:relative;
}
.intro-figure img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.intro-figure figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:14px 18px;font-size:13px;
  color:var(--text-2);background:linear-gradient(180deg,transparent,rgba(7,17,31,.92));
}

/* 左右交错场景 */
.scenes{display:grid;gap:12px}
.scene{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  padding:38px 0;
}
.scene + .scene{border-top:1px dashed rgba(130,220,255,.16)}
.scene__body{max-width:520px}
.scene__index{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:.16em;
  color:var(--green);margin-bottom:14px;font-variant-numeric:tabular-nums;
}
.scene__body h3{font-size:clamp(20px,2vw,26px);margin-bottom:14px}
.scene__body p{font-size:15.5px}
.scene__list{margin-top:20px;display:grid;gap:10px}
.scene__list li{
  display:flex;align-items:flex-start;gap:10px;font-size:14.5px;color:var(--text-2);
  padding:10px 14px;border-radius:12px;background:rgba(10,25,42,.5);border:1px solid var(--line);
}
.scene__list i{color:var(--cyan);font-size:12px;margin-top:5px}
.scene__media{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow);aspect-ratio:16/10;
}
.scene__media img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.scene__media:hover img{transform:scale(1.04)}
.scene__media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,17,31,.06) 30%,rgba(7,17,31,.78) 100%);
  pointer-events:none;
}
.scene__tag{
  position:absolute;left:16px;top:16px;z-index:2;
  padding:6px 13px;border-radius:999px;font-size:12.5px;font-weight:700;
  color:#04121F;background:linear-gradient(135deg,var(--cyan),var(--green));
  box-shadow:0 8px 22px rgba(33,212,232,.35);
}
.scene--rev .scene__media{order:-1}

/* 数据面板 */
.metrics-panel{
  border-radius:var(--radius-lg);border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(11,26,43,.92),rgba(7,17,31,.86));
  box-shadow:var(--shadow);padding:44px;
  position:relative;overflow:hidden;
}
.metrics-panel::before{
  content:"";position:absolute;right:-120px;top:-120px;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(33,212,232,.22),transparent 68%);
}
.metrics-panel > *{position:relative;z-index:2}
.metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;margin-top:36px}
.metric{
  padding:26px 22px;border-radius:var(--radius);
  background:rgba(7,17,31,.6);border:1px solid var(--line);
  transition:border-color .25s ease,transform .25s ease;
}
.metric:hover{border-color:var(--line-strong);transform:translateY(-2px)}
.metric b{
  display:block;font-size:32px;font-weight:800;line-height:1.1;font-variant-numeric:tabular-nums;
  background:linear-gradient(135deg,#21D4E8,#B6F34A);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.metric span{display:block;margin-top:10px;font-size:14px;color:var(--text-2)}
.metric em{display:block;margin-top:8px;font-style:normal;font-size:12.5px;color:var(--muted)}

/* 标签行 */
.chip-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:8px}
.chip-row .chip{font-size:14px;padding:10px 18px}
.chip-row .chip:hover{border-color:var(--line-strong);color:var(--text);transform:translateY(-2px)}

/* FAQ */
.faq{display:grid;gap:14px;max-width:900px}
.faq details{
  border-radius:var(--radius);border:1px solid var(--line);
  background:var(--card);backdrop-filter:blur(14px);
  transition:border-color .25s ease,background .25s ease;
  overflow:hidden;
}
.faq details[open]{border-color:rgba(33,212,232,.45);background:rgba(10,25,42,.78)}
.faq details:hover{border-color:var(--line-strong)}
.faq summary{
  list-style:none;cursor:pointer;padding:20px 54px 20px 24px;position:relative;
  display:flex;align-items:center;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary h3{font-size:17px;font-weight:700;color:var(--text)}
.faq summary::after{
  content:"\f067";font-family:"Font Awesome 6 Free";font-weight:900;
  position:absolute;right:22px;top:50%;transform:translateY(-50%);
  font-size:13px;color:var(--cyan);transition:transform .25s ease,color .25s ease;
}
.faq details[open] summary::after{content:"\f068";color:var(--green)}
.faq__answer{
  padding:0 24px 22px 24px;font-size:15px;color:var(--text-2);
  border-left:2px solid transparent;
}
.faq details[open] .faq__answer{border-left-color:var(--cyan);margin-left:22px;padding-left:18px}

/* CTA */
.cta{
  position:relative;overflow:hidden;border-radius:var(--radius-lg);
  border:1px solid var(--line);box-shadow:var(--shadow);
  background:linear-gradient(150deg,rgba(11,26,43,.95),rgba(7,17,31,.9));
  padding:56px;display:grid;grid-template-columns:1.25fr .75fr;gap:44px;align-items:center;
}
.cta::before{
  content:"";position:absolute;left:-140px;bottom:-160px;width:400px;height:400px;border-radius:50%;
  background:radial-gradient(circle,rgba(182,243,74,.18),transparent 68%);
}
.cta > *{position:relative;z-index:2}
.cta h2{margin-bottom:16px}
.cta p{font-size:16px;max-width:560px}
.cta__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.cta__note{margin-top:16px;font-size:13px;color:var(--muted)}
.cta__card{
  padding:26px;border-radius:var(--radius);
  background:rgba(7,17,31,.7);border:1px solid var(--line);
  backdrop-filter:blur(14px);
}
.cta__card h3{font-size:17px;margin-bottom:14px}
.cta__card li{display:flex;gap:10px;font-size:14px;color:var(--text-2);padding:8px 0}
.cta__card li i{color:var(--green);margin-top:5px;font-size:12px}

/* 页脚 */
.site-footer{
  position:relative;margin-top:24px;border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(11,26,43,.62),rgba(7,17,31,.96));
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(33,212,232,.7),rgba(182,243,74,.5),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding:64px 0 44px}
.footer-brand__mark{display:flex;align-items:center;gap:11px;font-weight:800;margin-bottom:16px}
.footer-brand__desc{font-size:14px;color:var(--muted);max-width:360px;line-height:1.8}
.footer-col h3{font-size:15px;color:var(--text);margin-bottom:18px;font-weight:700}
.footer-col ul{display:grid;gap:10px}
.footer-col a,.footer-col span{font-size:14px;color:var(--text-2)}
.footer-col a:hover{color:var(--cyan)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0 34px;border-top:1px solid rgba(130,220,255,.1);
  font-size:13px;color:var(--muted);
}
.footer-note{display:flex;gap:14px;flex-wrap:wrap}

/* 移动端底部 Tab */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:130;display:none;
  background:rgba(7,17,31,.94);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.tabbar__inner{display:grid;grid-template-columns:repeat(4,1fr);height:64px}
.tab{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  font-size:11px;color:var(--muted);transition:color .22s ease;
}
.tab i{font-size:17px}
.tab.is-active{color:var(--green)}
.tab.is-active::before{
  content:"";position:absolute;top:0;width:26px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--green));
  box-shadow:0 0 10px rgba(33,212,232,.9);
}

/* 响应式 */
@media (max-width:1280px){
  .container{width:min(1140px,100% - 36px)}
  .scene{gap:40px}
}
@media (max-width:1024px){
  :root{--gap-section:76px}
  .main-nav{display:none}
  .header-actions{margin-left:auto}
  .intro-grid{grid-template-columns:1fr;gap:32px}
  .metrics{grid-template-columns:repeat(2,minmax(0,1fr))}
  .stat-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta{grid-template-columns:1fr;padding:44px;gap:32px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
}
@media (max-width:992px){
  body{padding-bottom:calc(64px + env(safe-area-inset-bottom))}
  .tabbar{display:block}
  .header-actions .btn--ghost{display:none}
}
@media (max-width:820px){
  .scene{grid-template-columns:1fr;gap:26px;padding:30px 0}
  .scene--rev .scene__media{order:0}
  .scene__body{max-width:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding:48px 0 32px}
}
@media (max-width:520px){
  :root{--gap-section:58px}
  .container{width:min(100% - 28px,100%)}
  h1{font-size:28px}
  h2{font-size:23px}
  .page-hero{padding:112px 0 48px}
  .page-hero__lead{font-size:15.5px}
  .brand__text{font-size:14.5px}
  .brand__mark{width:30px;height:30px;font-size:15px;border-radius:9px}
  .header-inner{gap:14px}
  .stat-strip{grid-template-columns:1fr 1fr;gap:12px}
  .stat-strip .stat{padding:14px}
  .stat b{font-size:20px}
  .metrics{grid-template-columns:1fr;gap:14px}
  .metrics-panel{padding:26px 20px}
  .intro-card{padding:22px}
  .cta{padding:28px 20px}
  .cta__actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .faq summary{padding:16px 48px 16px 18px}
  .faq__answer{padding:0 18px 18px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
}

/* roulang page: category3 */
:root{
  --ink:#07111F;
  --ink-2:#0B1A2B;
  --ink-3:#0E2135;
  --cyan:#21D4E8;
  --green:#B6F34A;
  --amber:#FFB020;
  --success:#34D399;
  --warning:#FBBF24;
  --danger:#F87171;
  --text:#F5FAFF;
  --muted:#A9BED3;
  --dim:#6F86A0;
  --card:rgba(10,25,42,.62);
  --line:rgba(130,220,255,.16);
  --line-strong:rgba(130,220,255,.34);
  --radius-lg:20px;
  --radius:16px;
  --radius-sm:12px;
  --radius-xs:10px;
  --shadow:0 20px 60px rgba(0,0,0,.35);
  --shadow-soft:0 12px 34px rgba(0,0,0,.28);
  --glow-cyan:0 10px 30px rgba(33,212,232,.28);
  --container:1240px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background-color:var(--ink);
  background-image:
    radial-gradient(900px 520px at 12% -8%,rgba(33,212,232,.18),transparent 62%),
    radial-gradient(760px 480px at 92% 4%,rgba(182,243,74,.12),transparent 60%),
    linear-gradient(180deg,#07111F 0%,#08131F 42%,#07111F 100%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}
::selection{background:rgba(33,212,232,.35);color:#fff;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:88px 0;position:relative;}
.section--tight{padding:64px 0;}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--cyan);font-weight:600;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:linear-gradient(90deg,var(--cyan),var(--green));border-radius:2px;}
h1{
  font-size:52px;line-height:1.12;font-weight:800;letter-spacing:-.02em;
}
h2{font-size:34px;line-height:1.24;font-weight:800;letter-spacing:-.01em;}
h3{font-size:21px;line-height:1.4;font-weight:700;}
p{color:var(--muted);font-size:16px;line-height:1.78;}
.lead{font-size:17px;color:var(--muted);}
.num{font-variant-numeric:tabular-nums;}

/* 顶部导航 */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;height:72px;
  background:rgba(7,17,31,.78);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.header-inner{height:72px;display:flex;align-items:center;gap:24px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand__mark{
  width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
  font-size:17px;font-weight:800;color:#04121C;
  background:linear-gradient(135deg,var(--cyan),var(--green));
  box-shadow:0 0 0 1px rgba(255,255,255,.14),0 8px 22px rgba(33,212,232,.3);
}
.brand__text{font-size:17px;font-weight:800;letter-spacing:.01em;white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:12px;}
.nav-link{
  position:relative;padding:10px 14px;border-radius:10px;
  font-size:15px;font-weight:500;color:var(--muted);
  transition:color .22s ease,background .22s ease;
  white-space:nowrap;
}
.nav-link:hover{color:var(--text);background:rgba(33,212,232,.09);}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--green));
  transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--text);background:rgba(33,212,232,.1);}
.nav-link.is-active::after{transform:scaleX(1);box-shadow:0 0 12px rgba(33,212,232,.55);}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:var(--radius-xs);
  font-weight:600;font-size:15px;line-height:1;
  padding:13px 22px;cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,opacity .22s ease;
  white-space:nowrap;
}
.btn--sm{padding:10px 16px;font-size:14px;}
.btn--primary{
  color:#04121C;
  background:linear-gradient(135deg,var(--cyan),var(--green));
  box-shadow:0 0 0 1px rgba(255,255,255,.08),var(--glow-cyan);
}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,255,255,.16),0 16px 40px rgba(33,212,232,.42);}
.btn--primary:active{transform:translateY(0);}
.btn--ghost{
  color:var(--text);
  background:rgba(10,25,42,.55);
  border-color:var(--line-strong);
  backdrop-filter:blur(12px);
}
.btn--ghost:hover{border-color:var(--cyan);color:#fff;box-shadow:0 0 0 1px rgba(33,212,232,.28),0 10px 26px rgba(0,0,0,.3);}
.btn--amber{color:#20160A;background:linear-gradient(135deg,var(--amber),#FFD166);box-shadow:0 10px 30px rgba(255,176,32,.26);}
.btn--amber:hover{transform:translateY(-2px);}
.btn--block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}

/* 徽章与标签 */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
  border:1px solid var(--line);background:rgba(33,212,232,.1);color:var(--cyan);
}
.badge--green{background:rgba(182,243,74,.12);color:var(--green);border-color:rgba(182,243,74,.3);}
.badge--amber{background:rgba(255,176,32,.12);color:var(--amber);border-color:rgba(255,176,32,.3);}
.badge--dim{background:rgba(111,134,160,.14);color:var(--muted);border-color:rgba(111,134,160,.28);}

/* 面包屑 */
.breadcrumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13.5px;color:var(--dim);margin-bottom:20px;
}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--cyan);}
.breadcrumb i{font-size:10px;color:var(--dim);}
.breadcrumb .current{color:var(--cyan);}

/* Hero */
.hero{
  position:relative;
  padding:140px 0 76px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.hero__bg{
  position:absolute;inset:0;z-index:0;
  background-image:linear-gradient(115deg,rgba(7,17,31,.94) 0%,rgba(7,17,31,.78) 46%,rgba(7,17,31,.92) 100%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  opacity:.9;
}
.hero__grid{
  position:absolute;inset:0;z-index:1;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(rgba(33,212,232,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(33,212,232,.07) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 30%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 30%,#000 20%,transparent 78%);
}
.hero__inner{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;}
.hero h1 span{color:transparent;background:linear-gradient(100deg,var(--cyan),var(--green));-webkit-background-clip:text;background-clip:text;}
.hero__sub{margin-top:20px;font-size:17px;max-width:600px;}
.hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px;}
.hero__meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}

/* 状态面板 */
.panel{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  padding:26px;
}
.panel__head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:20px;}
.panel__title{font-size:17px;font-weight:700;}
.panel__title i{color:var(--cyan);margin-right:8px;}
.status-list{display:grid;gap:14px;}
.status-item{display:flex;align-items:center;gap:12px;font-size:14.5px;color:var(--muted);}
.status-item i{width:20px;text-align:center;}
.status-item .ok{color:var(--success);}
.status-item .warn{color:var(--warning);}
.status-item b{margin-left:auto;color:var(--text);font-weight:600;}
.score{
  margin-top:22px;padding:18px;border-radius:var(--radius-sm);
  background:linear-gradient(135deg,rgba(33,212,232,.14),rgba(182,243,74,.1));
  border:1px solid var(--line-strong);
  display:flex;align-items:center;gap:16px;
}
.score__num{font-size:34px;font-weight:800;line-height:1;color:var(--green);font-variant-numeric:tabular-nums;}
.score__txt{font-size:13.5px;color:var(--muted);}
.score__bar{margin-top:14px;height:6px;border-radius:999px;background:rgba(111,134,160,.24);overflow:hidden;}
.score__bar i{display:block;height:100%;width:78%;border-radius:999px;background:linear-gradient(90deg,var(--cyan),var(--green));}

/* 数据条 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.stat{
  padding:22px;border-radius:var(--radius);
  background:rgba(10,25,42,.5);
  border:1px solid var(--line);
  transition:border-color .24s ease,transform .24s ease;
}
.stat:hover{border-color:var(--line-strong);transform:translateY(-2px);}
.stat__num{font-size:30px;font-weight:800;line-height:1.1;color:var(--cyan);font-variant-numeric:tabular-nums;}
.stat__num em{font-style:normal;font-size:16px;color:var(--muted);margin-left:4px;}
.stat__label{margin-top:8px;font-size:13.5px;color:var(--dim);}

/* 通用卡片网格 */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.card{
  position:relative;
  padding:26px;
  border-radius:var(--radius);
  background:var(--card);
  border:1px solid var(--line);
  box-shadow:var(--shadow-soft);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  transition:transform .26s ease,border-color .26s ease,box-shadow .26s ease;
}
.card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:0 24px 60px rgba(0,0,0,.42),0 0 0 1px rgba(33,212,232,.16);}
.card__icon{
  width:46px;height:46px;border-radius:14px;display:grid;place-items:center;
  font-size:19px;color:var(--cyan);
  background:rgba(33,212,232,.12);border:1px solid rgba(33,212,232,.28);
  margin-bottom:16px;
}
.card h3{margin-bottom:10px;}
.card p{font-size:14.8px;}
.card__list{margin-top:16px;display:grid;gap:9px;}
.card__list li{display:flex;gap:9px;font-size:14px;color:var(--muted);}
.card__list li i{color:var(--green);font-size:12px;margin-top:6px;}

/* 介绍区 */
.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;}
.intro-media{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);}
.intro-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/11;}
.intro-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 40%,rgba(7,17,31,.72) 100%);
}
.intro-media__tag{
  position:absolute;left:18px;bottom:18px;z-index:2;
  display:flex;gap:8px;flex-wrap:wrap;
}
.intro-points{margin-top:24px;display:grid;gap:16px;}
.intro-points li{display:flex;gap:14px;}
.intro-points i{
  flex-shrink:0;width:32px;height:32px;border-radius:10px;display:grid;place-items:center;
  font-size:14px;color:#04121C;background:linear-gradient(135deg,var(--cyan),var(--green));
}
.intro-points b{display:block;font-size:15.5px;color:var(--text);margin-bottom:3px;}
.intro-points span{font-size:14px;color:var(--muted);}

/* 时间线 */
.timeline{position:relative;margin-top:14px;padding-left:34px;}
.timeline::before{
  content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(180deg,var(--cyan),rgba(182,243,74,.7),rgba(33,212,232,.1));
  border-radius:2px;
}
.tl-item{position:relative;padding:0 0 32px 0;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:-33px;top:8px;width:14px;height:14px;border-radius:50%;
  background:var(--ink);border:2px solid var(--cyan);
  box-shadow:0 0 0 4px rgba(33,212,232,.12),0 0 14px rgba(33,212,232,.5);
  transition:box-shadow .24s ease,border-color .24s ease;
}
.tl-item:hover::before{border-color:var(--green);box-shadow:0 0 0 5px rgba(182,243,74,.16),0 0 18px rgba(182,243,74,.55);}
.tl-card{
  padding:22px 24px;border-radius:var(--radius);
  background:var(--card);border:1px solid var(--line);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  transition:transform .26s ease,border-color .26s ease;
}
.tl-card:hover{transform:translateX(4px);border-color:var(--line-strong);}
.tl-step{font-size:12.5px;font-weight:700;letter-spacing:.12em;color:var(--cyan);text-transform:uppercase;}
.tl-card h3{margin:8px 0 8px;}
.tl-card p{font-size:14.8px;}
.tl-card .tl-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}

/* 对比 */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.compare__col{
  padding:28px;border-radius:var(--radius-lg);
  border:1px solid var(--line);
  background:rgba(10,25,42,.5);
}
.compare__col--best{
  border-color:rgba(182,243,74,.32);
  background:linear-gradient(160deg,rgba(33,212,232,.1),rgba(182,243,74,.07));
  box-shadow:0 20px 60px rgba(0,0,0,.34);
}
.compare__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.compare__head h3{font-size:19px;}
.compare__list{display:grid;gap:13px;}
.compare__list li{display:flex;gap:11px;font-size:14.6px;color:var(--muted);}
.compare__list i{font-size:13px;margin-top:6px;}
.compare__col--best .compare__list i{color:var(--green);}
.compare__col:not(.compare__col--best) .compare__list i{color:var(--dim);}

/* 场景卡（横向滚动组） */
.scene-row{
  display:grid;grid-auto-flow:column;grid-auto-columns:minmax(280px,1fr);gap:20px;
  overflow-x:auto;padding-bottom:8px;scroll-snap-type:x mandatory;
  scrollbar-width:thin;
}
.scene-row::-webkit-scrollbar{height:6px;}
.scene-row::-webkit-scrollbar-thumb{background:rgba(33,212,232,.32);border-radius:999px;}
.scene{
  scroll-snap-align:start;
  border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);
  background:var(--card);backdrop-filter:blur(14px);
  transition:transform .26s ease,border-color .26s ease;
}
.scene:hover{transform:translateY(-3px);border-color:var(--line-strong);}
.scene img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.scene__body{padding:22px;}
.scene__body h3{margin-bottom:8px;}
.scene__body p{font-size:14.6px;}

/* FAQ */
.faq{display:grid;gap:14px;max-width:900px;margin:0 auto;}
.faq-item{
  border-radius:var(--radius);border:1px solid var(--line);
  background:rgba(10,25,42,.5);overflow:hidden;
  transition:border-color .24s ease,box-shadow .24s ease;
}
.faq-item.is-open{border-color:var(--line-strong);box-shadow:0 0 0 1px rgba(33,212,232,.18),0 18px 44px rgba(0,0,0,.34);}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;text-align:left;
  padding:20px 22px;background:none;border:0;cursor:pointer;
}
.faq-q h3{font-size:16.5px;font-weight:700;flex:1;}
.faq-q i{color:var(--cyan);font-size:13px;transition:transform .26s ease;flex-shrink:0;}
.faq-item.is-open .faq-q i{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .34s ease;}
.faq-a__inner{padding:0 22px 22px 22px;border-left:2px solid var(--cyan);margin-left:22px;padding-left:20px;}
.faq-a__inner p{font-size:15px;}

/* CTA */
.cta{
  position:relative;overflow:hidden;
  border-radius:var(--radius-lg);
  border:1px solid var(--line-strong);
  background:
    radial-gradient(600px 300px at 8% 0%,rgba(33,212,232,.2),transparent 62%),
    radial-gradient(520px 300px at 100% 100%,rgba(182,243,74,.16),transparent 60%),
    rgba(10,25,42,.7);
  padding:52px 44px;
  box-shadow:var(--shadow);
}
.cta__grid{display:grid;grid-template-columns:1.2fr .8fr;gap:36px;align-items:center;position:relative;z-index:2;}
.cta h2{margin-bottom:14px;}
.cta p{max-width:560px;}
.cta__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.cta__side{display:grid;gap:12px;}
.cta__side .mini{
  display:flex;align-items:center;gap:12px;padding:14px 16px;border-radius:var(--radius-sm);
  background:rgba(7,17,31,.55);border:1px solid var(--line);font-size:14.2px;color:var(--muted);
}
.cta__side .mini i{color:var(--green);}

/* 表单面板 */
.form-panel{
  padding:26px;border-radius:var(--radius);
  background:var(--card);border:1px solid var(--line);
  backdrop-filter:blur(16px);box-shadow:var(--shadow-soft);
}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13.5px;color:var(--muted);margin-bottom:7px;font-weight:500;}
.field input{
  width:100%;padding:13px 15px;border-radius:var(--radius-xs);
  background:rgba(7,17,31,.72);border:1px solid var(--line);color:var(--text);
  transition:border-color .22s ease,box-shadow .22s ease;
}
.field input::placeholder{color:var(--dim);}
.field input:hover{border-color:var(--line-strong);}
.field input:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(33,212,232,.18);}
.field.is-error input{border-color:var(--danger);box-shadow:0 0 0 3px rgba(248,113,113,.16);}
.field.is-ok input{border-color:var(--success);box-shadow:0 0 0 3px rgba(52,211,153,.16);}
.field__hint{font-size:12.5px;color:var(--dim);margin-top:6px;}
.field__err{font-size:12.5px;color:var(--danger);margin-top:6px;display:none;}
.field.is-error .field__err{display:block;}
.form-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:4px 0 18px;font-size:13.5px;color:var(--muted);}
.check{display:flex;align-items:center;gap:8px;cursor:pointer;}
.check input{width:16px;height:16px;accent-color:#21D4E8;}

/* 页脚 */
.site-footer{
  margin-top:24px;
  border-top:1px solid rgba(33,212,232,.34);
  background:linear-gradient(180deg,rgba(9,21,36,.9),rgba(5,12,22,.98));
  padding:60px 0 32px;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;}
.footer-brand__mark{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand__desc{font-size:14px;color:var(--dim);max-width:330px;}
.footer-col h3{font-size:15px;margin-bottom:16px;color:var(--text);}
.footer-col ul{display:grid;gap:10px;}
.footer-col a,.footer-col span{font-size:14px;color:var(--muted);transition:color .2s ease;}
.footer-col a:hover{color:var(--cyan);}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(130,220,255,.1);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--dim);
}
.footer-note{display:flex;gap:16px;flex-wrap:wrap;}

/* 移动底部 Tab */
.mobile-tab{
  display:none;
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  height:64px;padding-bottom:env(safe-area-inset-bottom);
  background:rgba(7,17,31,.92);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-top:1px solid var(--line);
}
.mobile-tab__inner{height:64px;display:grid;grid-template-columns:repeat(4,1fr);align-items:center;}
.tab-item{
  position:relative;display:flex;flex-direction:column;align-items:center;gap:4px;
  font-size:11.5px;color:var(--dim);padding-top:6px;
}
.tab-item i{font-size:17px;}
.tab-item.is-active{color:var(--green);}
.tab-item.is-active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--green));
  box-shadow:0 0 10px rgba(33,212,232,.7);
}

/* 响应式 */
@media (max-width:1280px){
  h1{font-size:46px;}
  h2{font-size:30px;}
}
@media (max-width:1024px){
  .main-nav{display:none;}
  .hero{padding:120px 0 64px;}
  .hero__inner{grid-template-columns:1fr;gap:34px;}
  .intro-grid{grid-template-columns:1fr;gap:32px;}
  .grid-3{grid-template-columns:repeat(2,1fr);}
  .stats{grid-template-columns:repeat(2,1fr);}
  .cta__grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .section{padding:72px 0;}
}
@media (max-width:768px){
  body{font-size:15.5px;}
  h1{font-size:34px;}
  h2{font-size:26px;}
  h3{font-size:19px;}
  .section{padding:58px 0;}
  .container{padding:0 18px;}
  .header-actions .btn--ghost{display:none;}
  .brand__text{font-size:15.5px;}
  .grid-3,.grid-2,.compare{grid-template-columns:1fr;}
  .stats{grid-template-columns:1fr 1fr;}
  .cta{padding:34px 24px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .mobile-tab{display:block;}
  body{padding-bottom:64px;}
  .scene-row{grid-auto-flow:row;grid-auto-columns:auto;overflow-x:visible;}
  .footer-bottom{flex-direction:column;}
}
@media (max-width:520px){
  h1{font-size:29px;}
  h2{font-size:23px;}
  .hero{padding:104px 0 52px;}
  .stats{grid-template-columns:1fr;}
  .timeline{padding-left:26px;}
  .tl-item::before{left:-27px;width:12px;height:12px;}
  .panel{padding:20px;}
}