/* roulang page: index */
:root{
  --c-ink:#050C16;
  --c-surface:#0B1727;
  --c-surface-2:#12233A;
  --c-steel:#0E2A47;
  --c-neon:#19E0B4;
  --c-flame:#FF6B35;
  --c-ice:#7FB2FF;
  --t-1:#EAF3FB;
  --t-2:#9DB3C9;
  --t-3:#6C8299;
  --t-inv:#050C16;
  --g-bg:rgba(140,215,255,.06);
  --g-brd:rgba(140,225,255,.14);
  --g-blur:16px;
  --r-s:10px;
  --r-m:16px;
  --r-l:22px;
  --r-card:20px;
  --r-pill:999px;
  --shadow-card:0 1px 0 rgba(255,255,255,.06) inset, 0 20px 44px -20px rgba(0,0,0,.75);
  --shadow-glow:0 0 0 1px rgba(25,224,180,.35), 0 10px 30px -8px rgba(25,224,180,.45);
  --ease:.28s cubic-bezier(.4,0,.2,1);

  --bs-primary:#19E0B4;
  --bs-primary-rgb:25,224,180;
  --bs-body-bg:#0B1727;
  --bs-body-color:#EAF3FB;
  --bs-border-color:rgba(140,225,255,.14);
  --bs-link-color:#7FB2FF;
  --bs-link-hover-color:#19E0B4;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --bs-body-font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-surface);
  color:var(--t-1);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--c-ice);text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--c-neon)}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:0;color:var(--t-1)}
p{margin:0 0 18px}
ul{margin:0;padding:0;list-style:none}
button,input{font-family:inherit}
::selection{background:rgba(25,224,180,.28);color:#fff}

.num{font-family:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

.container{max-width:1200px;padding-left:24px;padding-right:24px;margin:0 auto;width:100%}
@media (min-width:1440px){.container{max-width:1320px}}
@media (max-width:575px){.container{padding-left:16px;padding-right:16px}}

.sec{padding:clamp(56px,7vw,104px) 0;position:relative}
.sec--ink{background:var(--c-ink)}
.sec--surface{background:var(--c-surface)}
.sec--steel{background:var(--c-steel)}
.sec-line{border-top:1px solid var(--g-brd)}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--r-pill);
  background:rgba(25,224,180,.10);
  border:1px solid rgba(25,224,180,.28);
  color:var(--c-neon);font-size:13px;line-height:1.6;letter-spacing:.01em;
}
.eyebrow i{font-size:12px}

.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.sec-head h2{font-size:clamp(23px,3vw,36px);line-height:1.28}
.sec-head p{color:var(--t-2);margin:10px 0 0;font-size:15px}
.sec-title-line h2{position:relative;padding-left:18px}
.sec-title-line h2::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:2px;background:var(--c-neon);box-shadow:0 0 16px rgba(25,224,180,.7)}
.more-link{color:var(--t-2);font-size:14px;display:inline-flex;align-items:center;gap:6px;border-bottom:1px solid transparent;padding-bottom:2px}
.more-link:hover{color:var(--c-neon);border-bottom-color:rgba(25,224,180,.5)}

/* ---------- Buttons ---------- */
.btn{--bs-btn-focus-box-shadow:none;border-radius:var(--r-pill);font-weight:600;font-size:15px;padding:12px 26px;line-height:1.4;border:1px solid transparent;transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease)}
.btn:focus-visible{outline:2px solid var(--c-neon);outline-offset:2px}
.btn-neon{background:var(--c-neon);color:var(--t-inv);box-shadow:var(--shadow-glow)}
.btn-neon:hover{background:#20f2c3;color:var(--t-inv);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(25,224,180,.55),0 16px 38px -10px rgba(25,224,180,.6)}
.btn-neon:active{transform:translateY(0);box-shadow:var(--shadow-glow)}
.btn-flame{background:var(--c-flame);color:#fff;box-shadow:0 10px 28px -10px rgba(255,107,53,.7)}
.btn-flame:hover{background:#ff8255;color:#fff;transform:translateY(-2px)}
.btn-flame:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--t-1);border-color:var(--g-brd)}
.btn-ghost:hover{background:rgba(140,215,255,.08);color:#fff;border-color:rgba(140,225,255,.34);transform:translateY(-2px)}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-block{width:100%;display:block}

/* ---------- Header / Nav ---------- */
.site-header{position:sticky;top:0;z-index:1030;background:transparent;border-bottom:1px solid transparent;transition:background var(--ease),border-color var(--ease),backdrop-filter var(--ease)}
.site-header.is-scrolled{background:rgba(6,13,24,.72);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);border-bottom-color:var(--g-brd)}
.nav-wrap{display:flex;align-items:center;gap:18px;height:72px}
.nav-side{display:flex;align-items:center;gap:6px;flex:1 1 0}
.nav-side.nav-right{justify-content:flex-end}
.nav-link-x{position:relative;color:var(--t-2);font-size:15px;padding:8px 12px;border-radius:var(--r-s);white-space:nowrap;transition:color var(--ease),background var(--ease)}
.nav-link-x::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--c-neon);transform:scaleX(0);transform-origin:left;transition:transform var(--ease)}
.nav-link-x:hover{color:var(--t-1);background:rgba(140,215,255,.06)}
.nav-link-x:hover::after{transform:scaleX(1)}
.nav-link-x.active{color:var(--t-1)}
.nav-link-x.active::after{transform:scaleX(1)}
.nav-cta{background:var(--c-neon);color:var(--t-inv);font-size:14px;font-weight:600;padding:10px 20px;border-radius:var(--r-pill);box-shadow:var(--shadow-glow);white-space:nowrap;transition:transform var(--ease),box-shadow var(--ease)}
.nav-cta:hover{color:var(--t-inv);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(25,224,180,.55),0 16px 34px -10px rgba(25,224,180,.6)}

.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(140deg,var(--c-neon),#0E9C86);color:var(--t-inv);font-weight:800;font-size:17px;letter-spacing:.01em;box-shadow:0 10px 26px -12px rgba(25,224,180,.9)}
.brand-txt{display:flex;flex-direction:column;line-height:1.1}
.brand-main{font-size:18px;font-weight:800;color:var(--t-1);letter-spacing:.005em}
.brand-sub{font-size:12px;color:var(--c-neon);letter-spacing:.06em}
.brand:hover .brand-main{color:var(--c-neon)}

.nav-toggle{width:42px;height:42px;border-radius:12px;border:1px solid var(--g-brd);background:rgba(140,215,255,.06);display:grid;place-items:center;gap:4px;padding:11px;margin-left:auto}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--t-1);transition:transform var(--ease),opacity var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.mobile-menu{border-top:1px solid var(--g-brd);background:rgba(6,13,24,.96);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}
.mobile-menu .menu-inner{padding:12px 0 22px}
.mobile-menu a.m-link{display:block;padding:13px 4px;color:var(--t-2);font-size:16px;border-bottom:1px solid rgba(140,225,255,.08)}
.mobile-menu a.m-link:hover,.mobile-menu a.m-link.active{color:var(--c-neon)}
.mobile-menu .m-cta{margin-top:18px}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:640px;padding:132px 0 76px;background:var(--c-ink);overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;opacity:.42;filter:saturate(.9)}
.hero::after{content:"";position:absolute;inset:0;background:
  radial-gradient(900px 480px at 78% 14%, rgba(25,224,180,.16), transparent 68%),
  radial-gradient(700px 460px at 4% 88%, rgba(127,178,255,.12), transparent 70%),
  linear-gradient(180deg, rgba(5,12,22,.78) 0%, rgba(5,12,22,.86) 52%, var(--c-ink) 100%);}
.hero-grid-overlay{position:absolute;inset:0;background-image:linear-gradient(rgba(140,225,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(140,225,255,.05) 1px,transparent 1px);background-size:64px 64px;-webkit-mask-image:radial-gradient(760px 460px at 46% 34%,#000 0%,transparent 78%);mask-image:radial-gradient(760px 460px at 46% 34%,#000 0%,transparent 78%);pointer-events:none}
.hero .container{position:relative;z-index:2}
.hero h1{font-size:clamp(30px,4.6vw,54px);line-height:1.22;font-weight:800;margin:22px 0 0}
.hero h1 em{font-style:normal;color:var(--c-neon);text-shadow:0 0 28px rgba(25,224,180,.45)}
.hero-sub{color:var(--t-2);font-size:17px;line-height:1.85;max-width:560px;margin:20px 0 0}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}
.hero-stats{display:flex;gap:34px;flex-wrap:wrap;margin-top:44px;padding-top:26px;border-top:1px solid var(--g-brd)}
.hero-stat .v{font-size:clamp(24px,2.6vw,32px);font-weight:800;color:var(--t-1);line-height:1.2}
.hero-stat .v span{font-size:14px;color:var(--c-neon);margin-left:4px;font-weight:600}
.hero-stat .k{font-size:13px;color:var(--t-3);margin-top:4px}

.login-card{position:relative;background:var(--g-bg);border:1px solid var(--g-brd);border-radius:var(--r-card);-webkit-backdrop-filter:blur(var(--g-blur));backdrop-filter:blur(var(--g-blur));box-shadow:var(--shadow-card),0 0 0 1px rgba(25,224,180,.18),0 30px 70px -30px rgba(25,224,180,.5);padding:26px}
.login-card::before{content:"";position:absolute;inset:-1px;border-radius:calc(var(--r-card) + 1px);padding:1px;background:linear-gradient(150deg,rgba(25,224,180,.55),rgba(127,178,255,.15) 45%,transparent 70%);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none}
.login-card-head{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:700;margin-bottom:20px}
.login-card-head .pulse{width:9px;height:9px;border-radius:50%;background:var(--c-neon);box-shadow:0 0 0 4px rgba(25,224,180,.16);animation:pulse 2.4s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 4px rgba(25,224,180,.16)}50%{box-shadow:0 0 0 9px rgba(25,224,180,.03)}}
.lc-field{margin-bottom:16px}
.lc-field label{display:block;font-size:13px;color:var(--t-3);margin-bottom:7px}
.lc-input{display:flex;align-items:center;justify-content:space-between;gap:10px;height:52px;padding:0 16px;border-radius:var(--r-m);background:rgba(5,12,22,.55);border:1px solid var(--g-brd);color:var(--t-3);font-size:15px}
.lc-input .code-btn{color:var(--c-neon);font-size:13px;border-left:1px solid var(--g-brd);padding-left:12px;white-space:nowrap}
.lc-note{font-size:12px;color:var(--t-3);line-height:1.7;margin:16px 0 0;text-align:center}
.login-card-float{position:absolute;right:-14px;top:-16px;background:rgba(5,12,22,.85);border:1px solid rgba(25,224,180,.4);color:var(--c-neon);font-size:12px;padding:6px 14px;border-radius:var(--r-pill);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}

/* ---------- Bento ---------- */
.bento{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;grid-auto-rows:minmax(200px,auto)}
.bento-card{position:relative;background:var(--g-bg);border:1px solid var(--g-brd);border-radius:var(--r-card);box-shadow:var(--shadow-card);overflow:hidden;display:flex;flex-direction:column;transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease)}
.bento-card:hover{transform:translateY(-4px);border-color:rgba(25,224,180,.38);box-shadow:var(--shadow-card),0 0 0 1px rgba(25,224,180,.22),0 30px 60px -26px rgba(25,224,180,.4)}
.bento-a{grid-column:span 2;grid-row:span 2}
.bento-f{grid-column:span 3}
.bento-e{grid-column:span 2}
.bento-media{position:relative;overflow:hidden;background:var(--c-surface-2)}
.bento-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.bento-card:hover .bento-media img{transform:scale(1.05)}
.bento-a .bento-media{aspect-ratio:16/10;flex:1 1 auto;min-height:230px}
.bento-b .bento-media,.bento-c .bento-media,.bento-d .bento-media{aspect-ratio:4/3}
.bento-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 30%,rgba(5,12,22,.72) 100%)}
.bento-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px}
.bento-a .bento-body{padding:26px 28px 28px}
.bento-body h3{font-size:clamp(17px,1.6vw,22px);line-height:1.4}
.bento-body p{color:var(--t-2);font-size:14.5px;line-height:1.8;margin:0}
.bento-f .bento-body{padding:26px 28px}
.bento-flame{position:absolute;top:16px;left:16px;z-index:2;background:var(--c-flame);color:#fff;font-size:12px;font-weight:700;padding:5px 12px;border-radius:var(--r-pill);box-shadow:0 8px 24px -10px rgba(255,107,53,.9)}
.bento-data{display:flex;flex-direction:column;justify-content:center;gap:8px;padding:28px;background:linear-gradient(145deg,rgba(14,42,71,.9),rgba(11,23,39,.9))}
.bento-data .big{font-size:clamp(38px,4.6vw,58px);font-weight:800;line-height:1;color:var(--c-neon);text-shadow:0 0 30px rgba(25,224,180,.35)}
.bento-data .big span{font-size:16px;color:var(--t-2);margin-left:6px;font-weight:600}
.bento-data h3{font-size:18px;margin-top:8px}
.bento-data p{color:var(--t-2);font-size:14px;margin:0}
.bento-h{display:flex;align-items:center;gap:28px}
.bento-h .b-media{flex:0 0 40%;max-width:420px;aspect-ratio:16/9;border-radius:var(--r-m);overflow:hidden;position:relative;background:var(--c-surface-2)}
.bento-h .b-media img{width:100%;height:100%;object-fit:cover}
.bento-h .b-txt{flex:1 1 auto;padding:24px 0}
.bento-h .b-txt h3{font-size:clamp(19px,2vw,26px);margin-bottom:10px}
.bento-h .b-txt p{color:var(--t-2);font-size:15px;margin-bottom:18px}

/* ---------- Quote carousel ---------- */
.quote-card{background:var(--g-bg);border:1px solid var(--g-brd);border-radius:var(--r-card);padding:26px;height:100%;position:relative;overflow:hidden;box-shadow:var(--shadow-card)}
.quote-card .mark{position:absolute;right:18px;top:8px;font-size:74px;line-height:1;color:rgba(25,224,180,.10);font-weight:800;font-family:Georgia,serif}
.stars{color:var(--c-neon);font-size:13px;letter-spacing:2px;margin-bottom:14px}
.quote-card q{display:block;quotes:none;color:var(--t-1);font-size:15px;line-height:1.85;margin-bottom:20px;position:relative;z-index:1}
.quote-who{display:flex;align-items:center;gap:12px;border-top:1px solid var(--g-brd);padding-top:16px}
.avatar{width:44px;height:44px;border-radius:50%;aspect-ratio:1/1;display:grid;place-items:center;background:linear-gradient(140deg,var(--c-steel),var(--c-surface-2));border:1px solid var(--g-brd);color:var(--c-neon);font-weight:700;font-size:15px;flex:0 0 auto}
.quote-who .n{font-size:14.5px;color:var(--t-1);font-weight:600;line-height:1.4}
.quote-who .r{font-size:12.5px;color:var(--t-3)}
.carousel-controls{display:flex;gap:12px;align-items:center}
.ctrl-btn{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:var(--g-bg);border:1px solid var(--g-brd);color:var(--t-1);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);transition:all var(--ease)}
.ctrl-btn:hover{background:rgba(25,224,180,.14);border-color:rgba(25,224,180,.5);color:var(--c-neon)}
.carousel-indicators-x{display:flex;gap:8px;align-items:center;margin:0 6px}
.carousel-indicators-x [data-bs-target]{width:26px;height:3px;border-radius:2px;background:rgba(140,225,255,.24);border:0;padding:0;transition:all var(--ease)}
.carousel-indicators-x [data-bs-target].active{width:44px;background:var(--c-neon);box-shadow:0 0 14px rgba(25,224,180,.7)}
.carousel-item .row{--bs-gutter-x:24px}

/* ---------- Guarantee strip ---------- */
.strip{background:var(--c-steel);border-top:1px solid var(--g-brd);border-bottom:1px solid var(--g-brd);padding:34px 0}
.strip-item{display:flex;gap:14px;align-items:flex-start}
.strip-ico{width:46px;height:46px;flex:0 0 auto;border-radius:50%;display:grid;place-items:center;background:rgba(140,215,255,.08);border:1px solid var(--g-brd);color:var(--c-neon);font-size:17px}
.strip-item .t{font-size:15.5px;font-weight:600;line-height:1.5}
.strip-item .d{font-size:13px;color:var(--t-3);line-height:1.7;margin-top:2px}

/* ---------- News (CMS) ---------- */
.news-card{display:flex;flex-direction:column;background:var(--g-bg);border:1px solid var(--g-brd);border-radius:var(--r-card);overflow:hidden;height:100%;box-shadow:var(--shadow-card);transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease)}
.news-card:hover{transform:translateY(-4px);border-color:rgba(25,224,180,.36);box-shadow:var(--shadow-card),0 0 0 1px rgba(25,224,180,.2),0 26px 56px -26px rgba(25,224,180,.38)}
.news-card .cover{aspect-ratio:16/10;overflow:hidden;background:var(--c-surface-2);position:relative}
.news-card .cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.news-card:hover .cover img{transform:scale(1.05)}
.news-card .body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.news-card h3{font-size:17px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card .sum{color:var(--t-2);font-size:14px;line-height:1.8;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;margin:0}
.news-meta{display:flex;align-items:center;gap:12px;margin-top:auto;padding-top:12px;border-top:1px solid var(--g-brd);font-size:12.5px;color:var(--t-3)}
.news-card.lead .cover{aspect-ratio:16/9}
.news-card.lead h3{font-size:clamp(19px,2vw,24px);-webkit-line-clamp:2}
.news-card.lead .sum{-webkit-line-clamp:3;font-size:15px}
.tag{display:inline-flex;align-items:center;gap:6px;font-size:12px;padding:4px 12px;border-radius:var(--r-pill);background:rgba(25,224,180,.1);border:1px solid rgba(25,224,180,.28);color:var(--c-neon);line-height:1.6;width:fit-content}
.tag-ice{background:rgba(127,178,255,.1);border-color:rgba(127,178,255,.3);color:var(--c-ice)}
.read-link{color:var(--c-ice);font-size:13.5px;display:inline-flex;align-items:center;gap:6px}
.news-empty{text-align:center;padding:56px 24px;border:1px dashed var(--g-brd);border-radius:var(--r-card);background:var(--g-bg)}
.news-empty i{font-size:30px;color:var(--c-neon);margin-bottom:14px;display:block}
.news-empty p{color:var(--t-2);margin:0 0 18px}

/* ---------- CTA ---------- */
.cta-band{position:relative;border-radius:var(--r-l);overflow:hidden;border:1px solid rgba(25,224,180,.28);box-shadow:0 0 0 1px rgba(25,224,180,.1),0 34px 80px -40px rgba(25,224,180,.5);padding:clamp(32px,4.6vw,56px)}
.cta-band::before{content:"";position:absolute;inset:0;background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;opacity:.4}
.cta-band::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(5,12,22,.92) 0%,rgba(14,42,71,.86) 55%,rgba(5,12,22,.9) 100%)}
.cta-band .cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(23px,3vw,34px);line-height:1.28}
.cta-band p{color:var(--t-2);margin:12px 0 0;font-size:15.5px;max-width:560px}
.cta-actions{display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.qr-box{width:112px;height:112px;border-radius:var(--r-m);background:rgba(5,12,22,.6);border:1px solid var(--g-brd);display:grid;place-items:center;color:var(--t-3);font-size:12px;text-align:center;line-height:1.5;padding:8px}
.qr-box i{font-size:26px;color:var(--c-neon);display:block;margin-bottom:6px}

/* ---------- FAQ ---------- */
.accordion{--bs-accordion-bg:transparent;--bs-accordion-border-color:var(--g-brd);--bs-accordion-border-radius:var(--r-m);--bs-accordion-inner-border-radius:var(--r-m);--bs-accordion-btn-color:var(--t-1);--bs-accordion-active-color:var(--t-1);--bs-accordion-active-bg:rgba(25,224,180,.06);--bs-accordion-btn-focus-box-shadow:none;--bs-accordion-btn-padding-y:20px;--bs-accordion-btn-padding-x:22px;--bs-accordion-body-padding-x:22px;--bs-accordion-body-padding-y:0}
.accordion-item{margin-bottom:14px;border:1px solid var(--g-brd);border-radius:var(--r-m);background:var(--g-bg);overflow:hidden;box-shadow:var(--shadow-card)}
.accordion-button{font-size:17px;font-weight:600;background:transparent;line-height:1.6;position:relative;padding-left:40px}
.accordion-button::before{content:"+";position:absolute;left:16px;top:50%;transform:translateY(-50%);color:var(--c-neon);font-size:20px;font-weight:400;line-height:1}
.accordion-button:not(.collapsed)::before{content:"−"}
.accordion-button::after{content:"";display:none}
.accordion-button:not(.collapsed){background:rgba(25,224,180,.06);box-shadow:none}
.accordion-button:focus{box-shadow:none;border-color:var(--g-brd)}
.accordion-item:has(.accordion-button:not(.collapsed)){border-left:3px solid var(--c-neon)}
.accordion-body{color:var(--t-2);font-size:15px;line-height:1.9;padding-top:0;padding-bottom:22px;border-top:1px solid var(--g-brd);padding-left:40px}
.accordion-collapse{transition:height .3s ease}

/* ---------- Footer ---------- */
.site-footer{background:var(--c-ink);border-top:1px solid var(--g-brd);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{color:var(--t-2);font-size:14px;line-height:1.9;margin:0 0 16px;max-width:320px}
.f-badges{display:flex;flex-wrap:wrap;gap:8px}
.f-title{font-size:15px;font-weight:700;margin-bottom:18px;color:var(--t-1)}
.f-list li{margin-bottom:11px}
.f-list a{color:var(--t-2);font-size:14px;position:relative;padding-bottom:2px}
.f-list a::after{content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;background:var(--c-neon);transform:scaleX(0);transform-origin:left;transition:transform var(--ease)}
.f-list a:hover{color:var(--c-neon)}
.f-list a:hover::after{transform:scaleX(1)}
.f-contact li{display:flex;gap:10px;color:var(--t-2);font-size:14px;margin-bottom:12px;line-height:1.7}
.f-contact i{color:var(--c-neon);margin-top:5px;font-size:13px}
.footer-bottom{margin-top:52px;border-top:1px solid var(--g-brd);padding:20px 0;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:13px;color:var(--t-3)}
.footer-bottom a{color:var(--t-3)}
.footer-bottom a:hover{color:var(--c-neon)}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:1199px){
  .bento-h{flex-direction:column;align-items:stretch;gap:0}
  .bento-h .b-media{flex:none;max-width:none;width:100%}
  .bento-h .b-txt{padding:22px 0 0}
}
@media (max-width:991px){
  .hero{min-height:520px;padding:104px 0 60px}
  .hero-stats{gap:24px;margin-top:34px}
  .bento{grid-template-columns:repeat(2,1fr)}
  .bento-a{grid-column:span 2;grid-row:auto}
  .bento-e{grid-column:span 2}
  .bento-f{grid-column:span 2}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:767px){
  .bento{grid-template-columns:1fr}
  .bento-a,.bento-e,.bento-f{grid-column:span 1}
  .bento-a .bento-media{min-height:180px}
  .strip{padding:26px 0}
  .cta-band .cta-inner{flex-direction:column;align-items:flex-start}
  .qr-box{width:100%;max-width:220px;height:auto;padding:16px}
}
@media (max-width:575px){
  body{font-size:15.5px}
  .nav-wrap{height:60px}
  .brand-main{font-size:16px}
  .brand-sub{font-size:11px}
  .brand-mark{width:34px;height:34px;font-size:15px}
  .hero{padding:92px 0 52px}
  .hero-actions .btn{width:100%;text-align:center}
  .footer-grid{grid-template-columns:1fr}
  .quote-card{padding:22px}
  .accordion-button{font-size:16px;padding-left:36px}
  .accordion-body{padding-left:36px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --c-ink:#050C16;
  --c-surface:#0B1727;
  --c-surface-2:#12233A;
  --c-steel:#0E2A47;
  --c-neon:#19E0B4;
  --c-flame:#FF6B35;
  --c-ice:#7FB2FF;
  --t-1:#EAF3FB;
  --t-2:#9DB3C9;
  --t-3:#6C8299;
  --t-inv:#050C16;
  --g-bg:rgba(140,215,255,.06);
  --g-brd:rgba(140,225,255,.14);
  --g-blur:16px;
  --r-s:10px;
  --r-m:16px;
  --r-l:22px;
  --r-pill:999px;
  --shadow-card:0 1px 0 rgba(255,255,255,.06) inset, 0 20px 44px -20px rgba(0,0,0,.75);
  --shadow-neon:0 0 0 1px rgba(25,224,180,.35), 0 10px 30px -8px rgba(25,224,180,.45);
  --bs-primary:#19E0B4;
  --bs-body-bg:#0B1727;
  --bs-body-color:#EAF3FB;
  --bs-border-color:rgba(140,225,255,.14);
  --bs-link-color:#7FB2FF;
  --bs-link-hover-color:#19E0B4;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-surface);
  color:var(--t-1);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:var(--c-ice);text-decoration:none;transition:color .22s ease,border-color .22s ease,background .22s ease,transform .22s ease;}
a:hover{color:var(--c-neon);}
img{max-width:100%;height:auto;display:block;}
ul,ol{padding-left:0;margin:0;list-style:none;}
h1,h2,h3,h4{margin:0;letter-spacing:0;font-weight:700;}
p{margin:0;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}
.container{width:100%;margin:0 auto;padding-left:16px;padding-right:16px;max-width:1200px;}
@media (min-width:1440px){.container{max-width:1320px;}}
@media (min-width:768px){.container{padding-left:24px;padding-right:24px;}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(6,13,24,.35);
  border-bottom:1px solid transparent;
  transition:background .3s ease,border-color .3s ease,backdrop-filter .3s ease;
}
.site-header.is-stuck{
  background:rgba(6,13,24,.78);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom-color:var(--g-brd);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:72px;gap:16px;}
.nav-side{display:flex;align-items:center;gap:6px;flex:1 1 0;margin:0;}
.nav-left{justify-content:flex-start;}
.nav-right{justify-content:flex-end;}
.nav-link-x{
  display:inline-block;position:relative;
  padding:8px 14px;border-radius:var(--r-pill);
  color:var(--t-2);font-size:15px;line-height:1.4;
}
.nav-link-x::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  border-radius:2px;background:var(--c-neon);transform:scaleX(0);transform-origin:left;
  transition:transform .25s ease;
}
.nav-link-x:hover{color:var(--t-1);}
.nav-link-x:hover::after{transform:scaleX(1);}
.nav-link-x.active{color:var(--t-1);}
.nav-link-x.active::after{transform:scaleX(1);}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(145deg,#10314F,#0A1B2C);
  border:1px solid var(--g-brd);
  color:var(--c-neon);font-size:18px;font-weight:700;
  box-shadow:0 0 18px -6px rgba(25,224,180,.55);
}
.brand-txt{display:flex;flex-direction:column;line-height:1.15;}
.brand-main{font-size:18px;font-weight:700;color:var(--t-1);letter-spacing:0;}
.brand-sub{font-size:12px;color:var(--c-neon);letter-spacing:.06em;}
.brand:hover .brand-main{color:#fff;}
.nav-cta{
  display:inline-block;margin-left:8px;
  padding:10px 22px;border-radius:var(--r-pill);
  background:linear-gradient(135deg,var(--c-neon),#0FB894);
  color:var(--t-inv);font-size:15px;font-weight:700;
  box-shadow:var(--shadow-neon);
}
.nav-cta:hover{color:var(--t-inv);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(25,224,180,.5),0 14px 34px -8px rgba(25,224,180,.6);}
.nav-toggle{
  width:44px;height:40px;border-radius:12px;border:1px solid var(--g-brd);
  background:var(--g-bg);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--t-1);}
.mobile-menu{border-top:1px solid var(--g-brd);background:rgba(6,13,24,.96);backdrop-filter:blur(18px);}
.menu-inner{display:flex;flex-direction:column;gap:4px;padding:14px 0 20px;}
.m-link{padding:12px 4px;color:var(--t-2);font-size:16px;border-bottom:1px solid rgba(140,225,255,.08);}
.m-link:hover{color:var(--c-neon);}
.m-cta{margin-top:14px;}
.btn-neon{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 26px;border-radius:var(--r-pill);border:none;
  background:linear-gradient(135deg,var(--c-neon),#0FB894);
  color:var(--t-inv);font-size:15.5px;font-weight:700;
  box-shadow:var(--shadow-neon);transition:transform .22s ease,box-shadow .22s ease;
}
.btn-neon:hover{color:var(--t-inv);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(25,224,180,.5),0 16px 36px -10px rgba(25,224,180,.65);}
.btn-neon:active{transform:translateY(1px);}
.btn-neon:focus-visible{outline:2px solid var(--c-neon);outline-offset:2px;}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 24px;border-radius:var(--r-pill);
  border:1px solid var(--g-brd);background:var(--g-bg);
  color:var(--t-1);font-size:15px;font-weight:600;
}
.btn-ghost:hover{color:var(--c-neon);border-color:rgba(25,224,180,.5);transform:translateY(-2px);}
.btn-ghost:focus-visible{outline:2px solid var(--c-neon);outline-offset:2px;}
.btn-block{width:100%;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  font-size:12.5px;line-height:1.6;
  background:rgba(25,224,180,.12);color:var(--c-neon);
  border:1px solid rgba(25,224,180,.28);
}
.tag-ice{background:rgba(127,178,255,.1);color:var(--c-ice);border-color:rgba(127,178,255,.26);}
.tag-flame{background:rgba(255,107,53,.12);color:#FF8C5F;border-color:rgba(255,107,53,.3);}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:clamp(44px,6vw,74px) 0 clamp(40px,5.5vw,66px);
  background-color:var(--c-ink);
  background-image:linear-gradient(90deg,rgba(5,12,22,.94) 0%,rgba(5,12,22,.86) 45%,rgba(5,12,22,.62) 100%),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center right;
  border-bottom:1px solid var(--g-brd);
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(140,225,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(140,225,255,.05) 1px,transparent 1px);
  background-size:64px 64px;mask-image:linear-gradient(180deg,rgba(0,0,0,.7),transparent 85%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.7),transparent 85%);
}
.page-hero .container{position:relative;z-index:2;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--t-3);margin-bottom:18px;}
.crumb a{color:var(--t-2);}
.crumb a:hover{color:var(--c-neon);}
.crumb span{color:var(--t-3);}
.crumb em{font-style:normal;color:var(--t-3);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.page-hero h1{
  font-size:clamp(26px,3.4vw,42px);
  line-height:1.28;font-weight:800;
  max-width:24em;
  letter-spacing:0;
  margin-bottom:20px;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px;color:var(--t-3);font-size:14px;}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:var(--t-3);display:inline-block;}
.meta-row i{color:var(--c-neon);margin-right:5px;}

/* ---------- layout ---------- */
.main-wrap{
  background:
    radial-gradient(900px 420px at 12% -8%,rgba(25,224,180,.10),transparent 60%),
    radial-gradient(760px 380px at 92% 6%,rgba(127,178,255,.08),transparent 62%),
    var(--c-surface);
  padding:clamp(40px,5.5vw,72px) 0 clamp(48px,6vw,84px);
}
.article-body{
  background:var(--g-bg);
  border:1px solid var(--g-brd);
  border-radius:20px;
  box-shadow:var(--shadow-card);
  padding:clamp(22px,3vw,40px);
  overflow-wrap:break-word;
  word-break:break-word;
}
.article-body>*:first-child{margin-top:0;}
.article-body p{margin:0 0 18px;color:#D7E5F2;font-size:16.5px;line-height:1.9;}
.article-body h2{
  position:relative;padding-left:16px;
  font-size:clamp(20px,2.2vw,25px);line-height:1.4;
  margin:40px 0 16px;color:var(--t-1);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.3em;width:4px;height:.86em;border-radius:3px;
  background:var(--c-neon);box-shadow:0 0 14px rgba(25,224,180,.7);
}
.article-body h3{font-size:21px;line-height:1.45;margin:30px 0 12px;color:var(--t-1);}
.article-body h4{font-size:17.5px;margin:24px 0 10px;color:var(--c-ice);}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:0;}
.article-body ul li{position:relative;padding-left:22px;margin-bottom:10px;color:#D7E5F2;}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;border-radius:2px;
  background:var(--c-neon);box-shadow:0 0 10px rgba(25,224,180,.55);transform:rotate(45deg);
}
.article-body ol{counter-reset:olist;}
.article-body ol li{position:relative;padding-left:34px;margin-bottom:12px;counter-increment:olist;color:#D7E5F2;}
.article-body ol li::before{
  content:counter(olist);
  position:absolute;left:0;top:2px;width:24px;height:24px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:12.5px;font-weight:700;font-variant-numeric:tabular-nums;
  background:rgba(25,224,180,.14);color:var(--c-neon);border:1px solid rgba(25,224,180,.32);
}
.article-body blockquote{
  margin:24px 0;padding:18px 22px;
  background:var(--g-bg);border:1px solid var(--g-brd);border-left:3px solid var(--c-neon);
  border-radius:var(--r-m);color:var(--t-2);font-size:15.5px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:16px;border:1px solid var(--g-brd);margin:22px 0 10px;}
.article-body a{color:var(--c-neon);text-decoration:underline;text-underline-offset:4px;}
.article-body a:hover{color:#5CF2CE;}
.article-body strong{color:#fff;}
.article-body hr{border:none;height:1px;background:var(--g-brd);margin:34px 0;}
.article-body .table-wrap{overflow-x:auto;margin:22px 0;border:1px solid var(--g-brd);border-radius:var(--r-m);}
.article-body table{width:100%;min-width:520px;border-collapse:collapse;font-size:15px;}
.article-body thead th{background:var(--c-steel);color:var(--t-1);font-weight:600;padding:13px 16px;text-align:left;white-space:nowrap;}
.article-body tbody td{padding:12px 16px;border-top:1px solid rgba(140,225,255,.1);color:var(--t-2);}
.article-body tbody tr:nth-child(even){background:rgba(140,215,255,.04);}
.article-body pre{
  background:var(--c-ink);border:1px solid var(--g-brd);border-radius:var(--r-m);
  padding:16px 18px;overflow-x:auto;margin:22px 0;
}
.article-body code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;color:#8FF3DC;}
.article-body p code,.article-body li code{background:rgba(140,215,255,.1);padding:2px 6px;border-radius:6px;}

/* ---------- sidebar ---------- */
.side-sticky{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px;}
.side-card{
  background:var(--g-bg);border:1px solid var(--g-brd);border-radius:20px;
  padding:22px 22px;box-shadow:var(--shadow-card);
}
.side-title{display:flex;align-items:center;gap:9px;font-size:15.5px;font-weight:700;color:var(--t-1);margin-bottom:14px;}
.side-title i{color:var(--c-neon);}
.toc-list{display:flex;flex-direction:column;gap:2px;}
.toc-list a{
  position:relative;display:block;padding:8px 10px 8px 14px;border-radius:var(--r-s);
  font-size:14.2px;color:var(--t-2);border-left:2px solid transparent;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.toc-list a:hover{background:rgba(25,224,180,.08);color:var(--c-neon);border-left-color:var(--c-neon);}
.side-rel{display:flex;flex-direction:column;gap:14px;}
.rel-item{display:flex;gap:12px;align-items:center;}
.rel-item img{width:66px;height:50px;object-fit:cover;border-radius:12px;border:1px solid var(--g-brd);flex:0 0 auto;}
.rel-item span{font-size:14.2px;color:var(--t-2);line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rel-item:hover span{color:var(--c-neon);}
.side-cta{
  background:linear-gradient(150deg,rgba(25,224,180,.14),rgba(14,42,71,.6));
  border:1px solid rgba(25,224,180,.3);
}
.side-cta p{font-size:14.5px;color:var(--t-2);margin:8px 0 16px;line-height:1.75;}

/* ---------- sections ---------- */
.block{padding:clamp(40px,5.5vw,72px) 0;}
.block-line{border-top:1px solid var(--g-brd);}
.block-head{margin-bottom:28px;}
.block-head h2{font-size:clamp(21px,2.4vw,29px);line-height:1.3;}
.block-head p{color:var(--t-2);font-size:15.5px;margin-top:10px;max-width:62ch;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:.08em;color:var(--c-neon);
  padding:5px 13px;border-radius:var(--r-pill);
  background:rgba(25,224,180,.1);border:1px solid rgba(25,224,180,.26);
  margin-bottom:16px;
}
.notice-card{
  background:var(--g-bg);border:1px solid var(--g-brd);border-radius:20px;
  padding:clamp(26px,4vw,52px);text-align:center;box-shadow:var(--shadow-card);
}
.notice-card i{font-size:34px;color:var(--c-flame);margin-bottom:16px;display:block;}
.notice-card h2{font-size:23px;margin-bottom:12px;}
.notice-card p{color:var(--t-2);font-size:15.5px;margin-bottom:22px;}

/* ---------- tags & share ---------- */
.foot-tools{display:flex;flex-wrap:wrap;gap:18px;align-items:center;justify-content:space-between;margin-top:28px;padding-top:22px;border-top:1px solid var(--g-brd);}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}
.share-row{display:flex;align-items:center;gap:10px;color:var(--t-3);font-size:14px;}
.share-btn{
  width:40px;height:40px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--g-bg);border:1px solid var(--g-brd);color:var(--t-2);
}
.share-btn:hover{color:var(--c-neon);border-color:rgba(25,224,180,.5);transform:translateY(-2px);}
.share-btn:focus-visible{outline:2px solid var(--c-neon);outline-offset:2px;}

/* ---------- prev / next ---------- */
.nav-duo{display:grid;grid-template-columns:1fr;gap:18px;}
@media (min-width:768px){.nav-duo{grid-template-columns:repeat(3,1fr);}}
.nav-card{
  display:block;background:var(--g-bg);border:1px solid var(--g-brd);border-radius:20px;
  padding:22px 24px;box-shadow:var(--shadow-card);height:100%;
}
.nav-card small{display:block;font-size:12.5px;color:var(--t-3);letter-spacing:.05em;margin-bottom:8px;}
.nav-card strong{display:block;font-size:16px;color:var(--t-1);font-weight:600;line-height:1.6;}
.nav-card:hover{border-color:rgba(25,224,180,.42);transform:translateY(-3px);}
.nav-card:hover strong{color:var(--c-neon);}
.nav-card i{color:var(--c-neon);margin-right:6px;}

/* ---------- related ---------- */
.card-x{
  background:var(--g-bg);border:1px solid var(--g-brd);border-radius:20px;
  overflow:hidden;height:100%;box-shadow:var(--shadow-card);
  display:flex;flex-direction:column;
  transition:transform .25s ease,border-color .25s ease;
}
.card-x:hover{transform:translateY(-4px);border-color:rgba(25,224,180,.4);}
.card-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--c-steel);}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.card-x:hover .card-media img{transform:scale(1.06);}
.card-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,12,22,0) 40%,rgba(5,12,22,.72));}
.card-body-x{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px;flex:1 1 auto;}
.card-body-x h3{font-size:18px;line-height:1.5;}
.card-body-x p{font-size:14.6px;color:var(--t-2);line-height:1.78;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.card-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--t-3);margin-top:auto;}
.card-meta i{color:var(--c-neon);margin-right:5px;}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;color:var(--c-neon);}
.link-more:hover{gap:10px;}

/* ---------- cta ---------- */
.cta-band{padding:clamp(40px,5.5vw,76px) 0;}
.cta-inner{
  position:relative;overflow:hidden;border-radius:var(--r-l);
  border:1px solid rgba(25,224,180,.3);
  background-color:var(--c-ink);
  background-image:linear-gradient(100deg,rgba(5,12,22,.9),rgba(5,12,22,.66)),url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;
  padding:clamp(28px,4vw,52px);
  display:flex;flex-wrap:wrap;gap:26px;align-items:center;justify-content:space-between;
  box-shadow:0 0 0 1px rgba(25,224,180,.14),0 30px 60px -30px rgba(0,0,0,.9);
}
.cta-inner h2{font-size:clamp(22px,2.6vw,32px);line-height:1.3;margin-bottom:10px;}
.cta-inner p{color:var(--t-2);font-size:15.5px;max-width:56ch;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
.qr-box{
  width:104px;height:104px;border-radius:var(--r-m);flex:0 0 auto;
  border:1px dashed rgba(140,225,255,.35);background:rgba(140,215,255,.06);
  display:flex;align-items:center;justify-content:center;flex-direction:column;gap:6px;
  color:var(--t-3);font-size:12px;text-align:center;
}
.qr-box i{font-size:26px;color:var(--c-ice);}

/* ---------- footer ---------- */
.site-footer{background:var(--c-ink);border-top:1px solid var(--g-brd);padding:clamp(42px,5.5vw,72px) 0 0;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px;}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:992px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px;}}
.footer-brand p{color:var(--t-2);font-size:14.6px;margin:16px 0 18px;max-width:42ch;line-height:1.8;}
.f-badges{display:flex;flex-wrap:wrap;gap:8px;}
.f-title{font-size:15.5px;margin-bottom:16px;color:var(--t-1);}
.f-list{display:flex;flex-direction:column;gap:10px;}
.f-list a{position:relative;font-size:14.6px;color:var(--t-2);}
.f-list a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:1px;background:var(--c-neon);transition:width .25s ease;}
.f-list a:hover{color:var(--c-neon);}
.f-list a:hover::after{width:100%;}
.f-contact{display:flex;flex-direction:column;gap:14px;}
.f-contact li{display:flex;gap:11px;font-size:14.4px;color:var(--t-2);line-height:1.75;}
.f-contact i{color:var(--c-neon);margin-top:5px;}
.footer-bottom{
  margin-top:clamp(34px,4.5vw,52px);padding:20px 0;
  border-top:1px solid rgba(140,225,255,.1);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13.4px;color:var(--t-3);
}
.footer-bottom a{color:var(--t-3);}
.footer-bottom a:hover{color:var(--c-neon);}

/* ---------- motion ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease;}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}
@media (max-width:991.98px){
  .nav-wrap{height:60px;}
  .page-hero{background-image:linear-gradient(160deg,rgba(5,12,22,.95),rgba(5,12,22,.8)),url('/assets/images/backpic/back-2.webp');}
}
@media (max-width:575.98px){
  body{font-size:16px;}
  .article-body{padding:20px 16px;}
  .cta-actions{width:100%;}
  .cta-actions .btn-neon,.cta-actions .btn-ghost{width:100%;}
  .crumb em{white-space:normal;}
  .foot-tools{flex-direction:column;align-items:flex-start;}
}

/* roulang page: category1 */
:root{
  --c-ink:#050C16;
  --c-surface:#0B1727;
  --c-surface-2:#12233A;
  --c-steel:#0E2A47;
  --c-neon:#19E0B4;
  --c-flame:#FF6B35;
  --c-ice:#7FB2FF;
  --t-1:#EAF3FB;
  --t-2:#9DB3C9;
  --t-3:#6C8299;
  --t-inv:#050C16;
  --g-bg:rgba(140,215,255,.06);
  --g-brd:rgba(140,225,255,.14);
  --g-blur:16px;
  --r-s:10px;
  --r-m:16px;
  --r-l:22px;
  --r-pill:999px;
  --shadow-card:0 1px 0 rgba(255,255,255,.06) inset,0 20px 44px -20px rgba(0,0,0,.75);
  --shadow-neon:0 0 0 1px rgba(25,224,180,.35),0 10px 30px -8px rgba(25,224,180,.45);
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --bs-primary:#19E0B4;
  --bs-body-bg:#0B1727;
  --bs-body-color:#EAF3FB;
  --bs-border-color:rgba(140,225,255,.14);
  --bs-link-color:#19E0B4;
  --bs-link-hover-color:#7FB2FF;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-surface);
  color:var(--t-1);
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:var(--c-neon);text-decoration:none;transition:color .22s ease,border-color .22s ease,background .22s ease}
a:hover{color:#fff}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5{margin:0;font-weight:700;letter-spacing:0;line-height:1.3}
p{margin:0}
button{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--c-neon);outline-offset:2px;border-radius:4px}
::selection{background:rgba(25,224,180,.28);color:#fff}
.num,.tabular{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* ---------- container ---------- */
.container{width:100%;max-width:1200px;margin-inline:auto;padding-inline:24px}
@media (min-width:1440px){.container{max-width:1320px}}
@media (max-width:575.98px){.container{padding-inline:16px}}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .3s ease,border-color .3s ease,backdrop-filter .3s ease;
}
.site-header.is-scrolled{
  background:rgba(6,13,24,.72);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
  border-bottom-color:var(--g-brd);
}
.nav-wrap{
  display:flex;align-items:center;justify-content:space-between;
  gap:18px;min-height:72px;position:relative;
}
.nav-side{display:flex;align-items:center;gap:4px;flex:1 1 0}
.nav-right{justify-content:flex-end}
.nav-link-x{
  position:relative;display:inline-block;
  padding:8px 15px;border-radius:var(--r-pill);
  font-size:15px;color:var(--t-2);white-space:nowrap;
  transition:color .22s ease,background .22s ease;
}
.nav-link-x:hover{color:var(--t-1);background:rgba(140,215,255,.07)}
.nav-link-x.active{color:var(--t-1);font-weight:600}
.nav-link-x.active::after{
  content:"";position:absolute;left:15px;right:15px;bottom:1px;height:2px;border-radius:2px;
  background:var(--c-neon);box-shadow:0 0 12px rgba(25,224,180,.85);
}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  margin-left:10px;padding:11px 24px;border-radius:var(--r-pill);
  background:linear-gradient(180deg,#22f0c2,#12c79c);
  color:var(--t-inv);font-weight:700;font-size:15px;white-space:nowrap;
  box-shadow:var(--shadow-neon);
  transition:transform .22s ease,box-shadow .22s ease,filter .22s ease;
}
.nav-cta:hover{
  color:var(--t-inv);transform:translateY(-2px);filter:brightness(1.05);
  box-shadow:0 0 0 1px rgba(25,224,180,.55),0 16px 34px -10px rgba(25,224,180,.6);
}
.nav-cta:active{transform:translateY(0)}
.brand{display:inline-flex;align-items:center;gap:11px;flex:0 0 auto;color:var(--t-1)}
.brand:hover{color:var(--t-1)}
.brand-mark{
  width:40px;height:40px;border-radius:13px;display:grid;place-items:center;
  background:linear-gradient(145deg,#1ff3c4,#0d8a6c);
  color:#04231C;font-weight:800;font-size:19px;line-height:1;
  box-shadow:0 10px 22px -10px rgba(25,224,180,.85);
}
.brand-txt{display:flex;flex-direction:column;line-height:1.12}
.brand-main{font-size:18px;font-weight:800;letter-spacing:.01em}
.brand-sub{font-size:12px;color:var(--c-neon);letter-spacing:.06em}
.nav-toggle{
  width:44px;height:44px;border-radius:13px;
  border:1px solid var(--g-brd);background:var(--g-bg);
  display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  cursor:pointer;transition:border-color .22s ease,background .22s ease;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--t-1);transition:transform .25s ease,opacity .25s ease}
.nav-toggle:hover{border-color:rgba(25,224,180,.5)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-menu{
  background:rgba(6,13,24,.97);
  -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
  border-bottom:1px solid var(--g-brd);
}
.menu-inner{display:flex;flex-direction:column;padding:12px 0 24px}
.m-link{
  padding:14px 4px;font-size:16px;color:var(--t-2);
  border-bottom:1px solid rgba(140,225,255,.08);
  transition:color .22s ease,padding-left .22s ease;
}
.m-link:hover,.m-link.active{color:var(--c-neon);padding-left:8px}
.m-cta{margin-top:18px}
@media (max-width:991.98px){
  .nav-wrap{min-height:60px}
  .brand{position:absolute;left:50%;transform:translateX(-50%)}
  .brand-mark{width:34px;height:34px;font-size:17px;border-radius:11px}
  .brand-main{font-size:16px}
  .brand-sub{font-size:11px}
}

/* ---------- buttons / tags ---------- */
.btn-neon{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:14px 32px;border:0;border-radius:var(--r-pill);
  background:linear-gradient(180deg,#22f0c2,#12c79c);
  color:var(--t-inv);font-weight:700;font-size:16px;cursor:pointer;
  box-shadow:var(--shadow-neon);
  transition:transform .22s ease,box-shadow .22s ease,filter .22s ease;
}
.btn-neon:hover{color:var(--t-inv);transform:translateY(-2px);filter:brightness(1.05)}
.btn-neon:active{transform:translateY(0)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 28px;border-radius:var(--r-pill);
  border:1px solid var(--g-brd);background:var(--g-bg);
  color:var(--t-1);font-weight:600;font-size:16px;cursor:pointer;
  transition:transform .22s ease,border-color .22s ease,color .22s ease;
}
.btn-ghost:hover{color:var(--c-neon);border-color:rgba(25,224,180,.55);transform:translateY(-2px)}
.btn-block{width:100%}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:var(--r-pill);
  font-size:13px;line-height:1.5;
  border:1px solid rgba(25,224,180,.28);
  background:rgba(25,224,180,.07);
  color:var(--c-neon);
}
.tag-ice{border-color:rgba(127,178,255,.3);background:rgba(127,178,255,.08);color:var(--c-ice)}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  padding:7px 17px;border-radius:var(--r-pill);
  border:1px solid rgba(25,224,180,.35);
  background:rgba(25,224,180,.08);
  color:var(--c-neon);font-size:13.5px;font-weight:600;letter-spacing:.04em;
}
.eyebrow i{font-size:12px}

/* ---------- hero ---------- */
.cat-hero{position:relative;overflow:hidden;background:var(--c-ink);border-bottom:1px solid var(--g-brd)}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  opacity:.24;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(58% 80% at 12% 18%,rgba(25,224,180,.18),transparent 62%),
    linear-gradient(180deg,rgba(5,12,22,.5),rgba(5,12,22,.96));
}
.cat-hero .container{position:relative;z-index:2;padding-top:clamp(46px,6.4vw,84px);padding-bottom:clamp(42px,5.6vw,72px)}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:14px;color:var(--t-3);margin-bottom:20px}
.crumb a{color:var(--t-2)}
.crumb a:hover{color:var(--c-neon)}
.crumb .sep{opacity:.6}
.crumb .cur{color:var(--c-neon)}
.cat-hero h1{
  font-size:clamp(30px,4.6vw,54px);line-height:1.22;font-weight:800;
  margin:22px 0 18px;max-width:820px;
}
.lead-x{max-width:780px;font-size:clamp(15px,1.55vw,17.5px);color:var(--t-2);line-height:1.85;margin-bottom:26px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px}
.hero-facts{display:flex;flex-wrap:wrap;gap:34px;margin-top:34px;padding-top:26px;border-top:1px solid rgba(140,225,255,.12)}
.hero-facts .fact{min-width:120px}
.hero-facts .f-num{font-size:clamp(24px,2.6vw,32px);font-weight:800;color:var(--c-neon);line-height:1.15}
.hero-facts .f-cap{font-size:13.5px;color:var(--t-3);margin-top:4px}

/* ---------- layout ---------- */
.section{padding-block:clamp(56px,7vw,104px)}
.section-alt{background:var(--c-ink)}
.section-steel{background:var(--c-steel)}
.sec-head{max-width:760px;margin-bottom:clamp(30px,3.6vw,48px)}
.sec-head h2{font-size:clamp(23px,3vw,36px);line-height:1.28;margin-bottom:14px}
.sec-head p{color:var(--t-2);font-size:16.5px}
.doc-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:clamp(32px,4vw,60px);align-items:start}

/* ---------- anchor nav ---------- */
.anchor-nav{
  position:sticky;top:100px;
  border:1px solid var(--g-brd);background:var(--g-bg);
  -webkit-backdrop-filter:blur(var(--g-blur));backdrop-filter:blur(var(--g-blur));
  border-radius:20px;padding:22px 18px;
  box-shadow:var(--shadow-card);
}
.anchor-nav .an-title{
  font-size:13px;letter-spacing:.1em;color:var(--t-3);
  font-weight:600;margin-bottom:14px;padding-left:12px;
}
.anchor-nav a{
  display:block;padding:10px 12px 10px 14px;
  font-size:14.5px;color:var(--t-2);
  border-left:2px solid transparent;border-radius:0 12px 12px 0;
  transition:color .22s ease,background .22s ease,border-color .22s ease;
}
.anchor-nav a:hover,.anchor-nav a.active{
  color:var(--c-neon);background:rgba(25,224,180,.07);border-left-color:var(--c-neon);
}
.anchor-note{
  margin-top:18px;padding-top:16px;border-top:1px solid rgba(140,225,255,.12);
  font-size:13px;color:var(--t-3);line-height:1.7;
}

/* ---------- feature rows ---------- */
.feature-row{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:clamp(26px,3.8vw,52px);align-items:center;
  padding-block:clamp(28px,4vw,48px);
  border-bottom:1px solid rgba(140,225,255,.09);
}
.feature-row:first-child{padding-top:0}
.feature-row:last-child{border-bottom:0;padding-bottom:0}
.feature-row.rev .f-media{order:2}
.feature-row.rev .f-body{order:1}
.f-media{position:relative}
.f-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:20px;border:1px solid var(--g-brd);
  box-shadow:var(--shadow-card);
}
.f-media .f-badge{
  position:absolute;left:16px;top:16px;
  padding:5px 13px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;
  background:rgba(5,12,22,.78);border:1px solid rgba(25,224,180,.4);color:var(--c-neon);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
}
.f-body .f-index{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:.14em;
  color:var(--c-neon);font-variant-numeric:tabular-nums;
}
.f-body h3{font-size:clamp(20px,2.4vw,24px);line-height:1.35;margin:12px 0 14px}
.f-body p{color:var(--t-2);margin-bottom:16px}
.f-check li{display:flex;gap:11px;color:var(--t-2);font-size:15.5px;margin-bottom:10px;line-height:1.75}
.f-check li:last-child{margin-bottom:0}
.f-check i{color:var(--c-neon);font-size:12px;margin-top:8px;flex:0 0 auto}

/* ---------- note card ---------- */
.note-card{
  margin-top:clamp(30px,3.6vw,46px);
  border:1px solid var(--g-brd);background:linear-gradient(160deg,rgba(127,178,255,.07),rgba(140,215,255,.02));
  border-radius:20px;padding:clamp(22px,2.6vw,30px);
  display:flex;gap:18px;align-items:flex-start;
  box-shadow:var(--shadow-card);
}
.note-card .n-ico{
  flex:0 0 auto;width:46px;height:46px;border-radius:14px;
  display:grid;place-items:center;border:1px solid rgba(127,178,255,.3);
  background:rgba(127,178,255,.1);color:var(--c-ice);font-size:18px;
}
.note-card h3{font-size:18px;margin-bottom:8px}
.note-card p{color:var(--t-2);font-size:15px}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:26px;
  border:1px solid rgba(25,224,180,.28);
  padding:clamp(30px,4.4vw,58px);
  box-shadow:var(--shadow-card);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  opacity:.3;
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,12,22,.86),rgba(5,12,22,.94));
}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:32px;align-items:center}
.cta-inner h2{font-size:clamp(23px,3vw,34px);line-height:1.3;margin-bottom:14px}
.cta-inner p{color:var(--t-2);max-width:600px}
.cta-actions{display:flex;flex-direction:column;gap:14px;align-items:flex-start}
.cta-tip{font-size:13px;color:var(--t-3)}

/* ---------- footer ---------- */
.site-footer{
  background:var(--c-ink);border-top:1px solid var(--g-brd);
  padding-top:clamp(48px,6vw,76px);margin-top:clamp(40px,6vw,80px);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:36px}
.footer-brand p{color:var(--t-2);font-size:14.5px;margin:18px 0 16px;max-width:330px}
.f-badges{display:flex;flex-wrap:wrap;gap:8px}
.f-title{font-size:15px;font-weight:700;margin-bottom:16px;color:var(--t-1)}
.f-list li{margin-bottom:11px}
.f-list a{position:relative;color:var(--t-2);font-size:14.5px}
.f-list a::after{
  content:"";position:absolute;left:0;bottom:-2px;width:0;height:1px;
  background:var(--c-neon);transition:width .26s ease;
}
.f-list a:hover{color:var(--c-neon)}
.f-list a:hover::after{width:100%}
.f-contact li{display:flex;gap:10px;color:var(--t-2);font-size:14px;line-height:1.72;margin-bottom:12px}
.f-contact i{color:var(--c-neon);font-size:13px;margin-top:6px;flex:0 0 auto}
.footer-bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  border-top:1px solid rgba(140,225,255,.1);
  margin-top:clamp(38px,5vw,56px);padding:22px 0 30px;
  font-size:13.5px;color:var(--t-3);
}
.footer-bottom a{color:var(--t-3)}
.footer-bottom a:hover{color:var(--c-neon)}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .doc-layout{grid-template-columns:216px minmax(0,1fr);gap:36px}
}
@media (max-width:991.98px){
  .doc-layout{grid-template-columns:1fr;gap:30px}
  .anchor-nav{position:static;display:flex;flex-wrap:wrap;gap:6px;padding:14px}
  .anchor-nav .an-title{width:100%;padding-left:0;margin-bottom:8px}
  .anchor-nav a{border-left:0;border:1px solid var(--g-brd);border-radius:var(--r-pill);padding:8px 15px;font-size:14px}
  .anchor-nav a:hover,.anchor-nav a.active{border-color:rgba(25,224,180,.5)}
  .anchor-note{width:100%;margin-top:10px;padding-top:12px}
  .feature-row{grid-template-columns:1fr;gap:22px;padding-block:32px}
  .feature-row.rev .f-media{order:0}
  .feature-row.rev .f-body{order:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .cta-inner{grid-template-columns:1fr;gap:24px}
  .cta-actions{width:100%}
  .cta-actions .btn-neon,.cta-actions .btn-ghost{width:100%}
}
@media (max-width:767.98px){
  body{font-size:16px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .hero-facts{gap:22px}
}
@media (max-width:575.98px){
  .hero-facts{flex-direction:column;gap:16px}
  .note-card{flex-direction:column;gap:14px}
  .f-media img{aspect-ratio:4/3}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
}

/* roulang page: category2 */
:root{
  --c-ink:#050C16;
  --c-surface:#0B1727;
  --c-surface-2:#12233A;
  --c-steel:#0E2A47;
  --c-neon:#19E0B4;
  --c-flame:#FF6B35;
  --c-ice:#7FB2FF;
  --t-1:#EAF3FB;
  --t-2:#9DB3C9;
  --t-3:#6C8299;
  --t-inv:#050C16;
  --g-bg:rgba(140,215,255,.06);
  --g-brd:rgba(140,225,255,.14);
  --g-blur:16px;
  --r-s:10px;
  --r-m:16px;
  --r-l:22px;
  --r-pill:999px;
  --shadow-card:0 1px 0 rgba(255,255,255,.06) inset, 0 20px 44px -20px rgba(0,0,0,.75);
  --shadow-neon:0 0 0 1px rgba(25,224,180,.35), 0 10px 30px -8px rgba(25,224,180,.45);
  --bs-primary:var(--c-neon);
  --bs-body-bg:var(--c-surface);
  --bs-body-color:var(--t-1);
  --bs-border-color:var(--g-brd);
  --bs-link-color:var(--c-ice);
  --bs-link-hover-color:var(--c-neon);
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-surface);
  color:var(--t-1);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--c-ice);text-decoration:none;transition:color .2s ease,border-color .2s ease}
a:hover{color:var(--c-neon)}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
h1,h2,h3,h4{line-height:1.3;font-weight:700;letter-spacing:0}
::selection{background:rgba(25,224,180,.28);color:var(--t-1)}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";letter-spacing:.02em}

.container{
  width:100%;
  max-width:1200px;
  margin-inline:auto;
  padding-inline:24px;
}
@media (min-width:1440px){ .container{max-width:1320px} }
@media (max-width:575.98px){ .container{padding-inline:16px} }

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

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1040;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .3s ease,border-color .3s ease,backdrop-filter .3s ease;
}
.site-header.scrolled{
  background:rgba(6,13,24,.72);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--g-brd);
}
.nav-wrap{
  display:flex;
  align-items:center;
  height:72px;
  gap:18px;
}
.nav-side{
  display:flex;
  align-items:center;
  gap:26px;
  flex:1 1 0;
}
.nav-left{justify-content:flex-start}
.nav-right{justify-content:flex-end}
.nav-link-x{
  position:relative;
  display:inline-block;
  padding:6px 0;
  font-size:15px;
  color:var(--t-2);
  white-space:nowrap;
}
.nav-link-x:after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  border-radius:2px;
  background:var(--c-neon);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .25s ease;
}
.nav-link-x:hover{color:var(--t-1)}
.nav-link-x:hover:after{transform:scaleX(1)}
.nav-link-x.active{color:var(--t-1)}
.nav-link-x.active:after{transform:scaleX(1)}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  color:var(--t-1);
}
.brand:hover{color:var(--t-1)}
.brand-mark{
  width:38px;
  height:38px;
  border-radius:12px;
  display:grid;
  place-items:center;
  font-size:18px;
  font-weight:800;
  color:var(--t-inv);
  background:linear-gradient(150deg,#27f3c6,#0fb98f);
  box-shadow:0 8px 22px -10px rgba(25,224,180,.85);
}
.brand-txt{display:flex;flex-direction:column;line-height:1.15}
.brand-main{font-size:18px;font-weight:800;letter-spacing:.01em}
.brand-sub{font-size:12px;color:var(--c-neon);letter-spacing:.14em}

.nav-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 22px;
  border-radius:var(--r-pill);
  background:linear-gradient(180deg,#21f0c1,#12c79d);
  color:var(--t-inv);
  font-size:14px;
  font-weight:700;
  box-shadow:var(--shadow-neon);
  transition:transform .2s ease,box-shadow .2s ease;
}
.nav-cta:hover{
  color:var(--t-inv);
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(25,224,180,.5),0 14px 34px -10px rgba(25,224,180,.65);
}

.nav-toggle{
  margin-left:auto;
  width:44px;
  height:44px;
  border:1px solid var(--g-brd);
  background:var(--g-bg);
  border-radius:12px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  cursor:pointer;
}
.nav-toggle span{
  display:block;
  width:18px;
  height:2px;
  border-radius:2px;
  background:var(--t-1);
  transition:transform .25s ease,opacity .25s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.mobile-menu{
  background:rgba(6,13,24,.96);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--g-brd);
}
.menu-inner{display:flex;flex-direction:column;padding:14px 0 22px}
.m-link{
  padding:14px 4px;
  font-size:16px;
  color:var(--t-2);
  border-bottom:1px solid rgba(140,225,255,.08);
}
.m-link:hover,.m-link.active{color:var(--c-neon)}
.m-cta{margin-top:18px;width:100%;text-align:center;justify-content:center}

@media (max-width:991.98px){
  .nav-wrap{height:60px}
  .brand-main{font-size:16px}
  .brand-sub{font-size:11px}
  .brand-mark{width:34px;height:34px;border-radius:10px;font-size:16px}
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 28px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-size:15px;
  font-weight:700;
  line-height:1.2;
  cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn:focus,.btn:focus-visible{outline:2px solid var(--c-neon);outline-offset:2px;box-shadow:none}
.btn-neon{
  background:linear-gradient(180deg,#21f0c1,#12c79d);
  color:var(--t-inv);
  box-shadow:var(--shadow-neon);
}
.btn-neon:hover{
  color:var(--t-inv);
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(25,224,180,.5),0 16px 38px -10px rgba(25,224,180,.6);
}
.btn-neon:active{transform:translateY(-1px)}
.btn-ghost{
  background:var(--g-bg);
  border-color:var(--g-brd);
  color:var(--t-1);
}
.btn-ghost:hover{
  color:var(--c-neon);
  border-color:rgba(25,224,180,.5);
  transform:translateY(-2px);
}
.btn-block{width:100%}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 13px;
  border-radius:var(--r-pill);
  font-size:13px;
  line-height:1.6;
  color:var(--c-neon);
  background:rgba(25,224,180,.1);
  border:1px solid rgba(25,224,180,.24);
}
.tag-ice{color:var(--c-ice);background:rgba(127,178,255,.09);border-color:rgba(127,178,255,.24)}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:var(--r-pill);
  font-size:13px;
  color:var(--c-neon);
  background:var(--g-bg);
  border:1px solid var(--g-brd);
  letter-spacing:.06em;
}

/* ---------- section rhythm ---------- */
.section{padding-block:clamp(56px,7vw,104px)}
.section-alt{background:var(--c-ink);border-block:1px solid rgba(140,225,255,.08)}
.section-steel{background:var(--c-steel);border-block:1px solid rgba(140,225,255,.12)}
.sec-head{max-width:760px;margin-bottom:44px}
.sec-head.center{margin-inline:auto;text-align:center}
.sec-title{
  position:relative;
  padding-left:16px;
  font-size:clamp(23px,3vw,36px);
  margin-bottom:14px;
}
.sec-title:before{
  content:"";
  position:absolute;
  left:0;
  top:.2em;
  bottom:.2em;
  width:4px;
  border-radius:2px;
  background:linear-gradient(180deg,var(--c-neon),rgba(25,224,180,.15));
}
.sec-head.center .sec-title{padding-left:0}
.sec-head.center .sec-title:before{display:none}
.sec-desc{color:var(--t-2);font-size:16px}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;
  padding-block:clamp(56px,7vw,92px);
  background:linear-gradient(180deg,#050C16 0%,#0B1727 100%);
  border-bottom:1px solid rgba(140,225,255,.1);
  overflow:hidden;
}
.page-hero:before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  opacity:.18;
  filter:saturate(.8);
}
.page-hero:after{
  content:"";
  position:absolute;
  inset:0;
  background:
    radial-gradient(760px 340px at 12% 18%, rgba(25,224,180,.16), transparent 68%),
    linear-gradient(180deg, rgba(5,12,22,.55) 0%, rgba(5,12,22,.92) 100%);
}
.page-hero .container{position:relative;z-index:2}
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--t-3);
  margin-bottom:22px;
}
.crumb a{color:var(--t-2)}
.crumb a:hover{color:var(--c-neon)}
.crumb em{font-style:normal;color:var(--t-2)}
.page-hero h1{
  font-size:clamp(30px,4.6vw,54px);
  line-height:1.22;
  font-weight:800;
  margin:18px 0 16px;
  max-width:20em;
}
.page-hero .lead{
  max-width:720px;
  color:var(--t-2);
  font-size:17px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-facts{
  display:flex;
  flex-wrap:wrap;
  gap:34px;
  margin-top:38px;
  padding-top:26px;
  border-top:1px solid rgba(140,225,255,.12);
}
.hero-facts div{display:flex;flex-direction:column;gap:2px}
.hero-facts .n{font-size:26px;font-weight:800;color:var(--t-1)}
.hero-facts .n small{font-size:13px;font-weight:600;color:var(--c-neon);margin-left:4px}
.hero-facts .l{font-size:13px;color:var(--t-3)}

/* ---------- timeline ---------- */
.timeline{position:relative;margin-top:10px}
.timeline:before{
  content:"";
  position:absolute;
  left:23px;
  top:16px;
  bottom:24px;
  width:2px;
  background:linear-gradient(180deg,rgba(25,224,180,.55),rgba(127,178,255,.18) 55%,rgba(140,225,255,.05));
}
.step{position:relative;padding-left:76px;margin-bottom:38px}
.step:last-child{margin-bottom:0}
.step-node{
  position:absolute;
  left:0;
  top:2px;
  width:48px;
  height:48px;
  border-radius:50%;
  display:grid;
  place-items:center;
  font-size:17px;
  font-weight:800;
  color:var(--t-inv);
  background:linear-gradient(150deg,#27f3c6,#0fb98f);
  box-shadow:0 0 0 6px rgba(25,224,180,.08),0 12px 26px -12px rgba(25,224,180,.9);
}
.step-body{
  background:var(--g-bg);
  border:1px solid var(--g-brd);
  border-radius:20px;
  padding:26px 28px;
  box-shadow:var(--shadow-card);
  backdrop-filter:blur(var(--g-blur));
  -webkit-backdrop-filter:blur(var(--g-blur));
  transition:border-color .25s ease,transform .25s ease;
}
.step-body:hover{border-color:rgba(25,224,180,.34);transform:translateY(-2px)}
.step-body h3{font-size:20px;margin-bottom:10px}
.step-body p{color:var(--t-2);font-size:16px}
.step-body p + p{margin-top:10px}
.step-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.step-figure{
  margin-top:18px;
  border-radius:16px;
  overflow:hidden;
  border:1px solid var(--g-brd);
}
.step-figure img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
}
.step-figure figcaption{
  padding:10px 14px;
  font-size:13px;
  color:var(--t-3);
  background:rgba(5,12,22,.6);
}

/* ---------- panel / checklist ---------- */
.panel{
  background:var(--g-bg);
  border:1px solid var(--g-brd);
  border-radius:20px;
  padding:26px 28px;
  box-shadow:var(--shadow-card);
  backdrop-filter:blur(var(--g-blur));
  -webkit-backdrop-filter:blur(var(--g-blur));
  height:100%;
}
.panel h3{font-size:19px;margin-bottom:12px}
.panel p{color:var(--t-2);font-size:15px}
.check-list{display:grid;gap:12px;margin-top:18px}
.check-list li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  font-size:15px;
  color:var(--t-2);
}
.check-list i{
  flex:0 0 auto;
  width:22px;
  height:22px;
  margin-top:3px;
  border-radius:50%;
  display:grid;
  place-items:center;
  font-size:11px;
  color:var(--t-inv);
  background:linear-gradient(150deg,#27f3c6,#0fb98f);
}
.check-list strong{color:var(--t-1);font-weight:600}

/* ---------- table ---------- */
.table-wrap{
  overflow-x:auto;
  border:1px solid var(--g-brd);
  border-radius:20px;
  background:var(--g-bg);
  box-shadow:var(--shadow-card);
}
table.ck{width:100%;min-width:680px;border-collapse:collapse;font-size:15px}
table.ck thead th{
  text-align:left;
  padding:16px 20px;
  font-size:13px;
  letter-spacing:.06em;
  color:var(--c-neon);
  background:rgba(25,224,180,.07);
  border-bottom:1px solid rgba(140,225,255,.16);
  white-space:nowrap;
}
table.ck tbody td{
  padding:16px 20px;
  color:var(--t-2);
  border-bottom:1px solid rgba(140,225,255,.08);
  vertical-align:top;
}
table.ck tbody tr:nth-child(even){background:rgba(140,215,255,.03)}
table.ck tbody tr:last-child td{border-bottom:0}
table.ck tbody td:first-child{color:var(--t-1);font-weight:600}

/* ---------- notice band ---------- */
.band{
  background:var(--c-steel);
  border-block:1px solid rgba(140,225,255,.14);
  padding-block:clamp(36px,4vw,54px);
}
.band-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:24px;
}
.band-item{display:flex;gap:14px;align-items:flex-start}
.band-ico{
  flex:0 0 auto;
  width:44px;
  height:44px;
  border-radius:50%;
  display:grid;
  place-items:center;
  color:var(--c-neon);
  background:var(--g-bg);
  border:1px solid var(--g-brd);
  font-size:16px;
}
.band-item h4{font-size:16px;margin-bottom:4px}
.band-item p{font-size:13px;color:var(--t-2);line-height:1.7}

/* ---------- qa ---------- */
.qa-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.qa{
  background:var(--g-bg);
  border:1px solid var(--g-brd);
  border-radius:20px;
  padding:24px 26px;
  box-shadow:var(--shadow-card);
  transition:border-color .25s ease,transform .25s ease;
}
.qa:hover{border-color:rgba(25,224,180,.32);transform:translateY(-2px)}
.qa h3{font-size:17px;margin-bottom:10px;display:flex;gap:10px;align-items:flex-start}
.qa h3 i{color:var(--c-neon);font-size:15px;margin-top:4px}
.qa p{font-size:15px;color:var(--t-2)}

/* ---------- CTA ---------- */
.cta-wrap{padding-block:clamp(56px,7vw,96px)}
.cta-box{
  position:relative;
  overflow:hidden;
  border-radius:22px;
  border:1px solid rgba(25,224,180,.3);
  background:linear-gradient(120deg,#0B1727 0%,#0E2A47 100%);
  box-shadow:var(--shadow-card);
  padding:clamp(28px,4vw,52px);
  display:grid;
  grid-template-columns:1.4fr .6fr;
  gap:34px;
  align-items:center;
}
.cta-box:before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  opacity:.22;
}
.cta-box:after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(5,12,22,.94) 0%,rgba(5,12,22,.7) 100%);
}
.cta-box > *{position:relative;z-index:2}
.cta-box h2{font-size:clamp(24px,3vw,34px);margin-bottom:14px}
.cta-box p{color:var(--t-2);max-width:640px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.cta-side{display:flex;flex-direction:column;align-items:center;gap:12px}
.qr{
  width:132px;
  height:132px;
  border-radius:16px;
  display:grid;
  place-items:center;
  font-size:44px;
  color:var(--c-neon);
  background:rgba(5,12,22,.6);
  border:1px solid var(--g-brd);
}
.qr-note{font-size:13px;color:var(--t-3);text-align:center}

/* ---------- footer ---------- */
.site-footer{
  background:var(--c-ink);
  border-top:1px solid rgba(140,225,255,.12);
  padding-top:clamp(48px,6vw,76px);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.3fr;
  gap:34px;
  padding-bottom:44px;
}
.footer-brand p{color:var(--t-2);font-size:14px;margin:18px 0;max-width:340px}
.f-badges{display:flex;flex-wrap:wrap;gap:8px}
.f-title{font-size:15px;margin-bottom:18px;color:var(--t-1)}
.f-list{display:grid;gap:12px}
.f-list a{
  position:relative;
  font-size:14px;
  color:var(--t-2);
  display:inline-block;
}
.f-list a:after{
  content:"";
  position:absolute;
  left:0;
  bottom:-2px;
  width:100%;
  height:1px;
  background:var(--c-neon);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .25s ease;
}
.f-list a:hover{color:var(--c-neon)}
.f-list a:hover:after{transform:scaleX(1)}
.f-contact{display:grid;gap:14px}
.f-contact li{display:flex;gap:10px;font-size:14px;color:var(--t-2);line-height:1.7}
.f-contact i{color:var(--c-neon);margin-top:4px;font-size:14px}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  justify-content:space-between;
  align-items:center;
  padding:20px 0 26px;
  border-top:1px solid rgba(140,225,255,.1);
  font-size:13px;
  color:var(--t-3);
}
.footer-bottom a{color:var(--t-3)}
.footer-bottom a:hover{color:var(--c-neon)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.is-in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .band-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:991.98px){
  .page-hero h1{max-width:none}
  .cta-box{grid-template-columns:1fr}
  .cta-side{flex-direction:row;justify-content:flex-start;gap:18px}
}
@media (max-width:767.98px){
  .qa-grid{grid-template-columns:1fr}
  .step{padding-left:62px}
  .step-node{width:42px;height:42px;font-size:15px}
  .timeline:before{left:20px}
  .step-body{padding:22px 20px}
  .hero-facts{gap:22px}
}
@media (max-width:575.98px){
  .band-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
  .cta-actions .btn{width:100%}
  .step{padding-left:0;padding-top:58px}
  .timeline:before{left:50%;transform:translateX(-50%)}
  .step-node{left:50%;margin-left:-21px}
  .cta-side{flex-direction:column;align-items:flex-start}
}

/* roulang page: category3 */
:root{
  --c-ink:#050C16;
  --c-surface:#0B1727;
  --c-surface-2:#12233A;
  --c-steel:#0E2A47;
  --c-neon:#19E0B4;
  --c-flame:#FF6B35;
  --c-ice:#7FB2FF;
  --t-1:#EAF3FB;
  --t-2:#9DB3C9;
  --t-3:#6C8299;
  --t-inv:#050C16;
  --g-bg:rgba(140,215,255,.06);
  --g-brd:rgba(140,225,255,.14);
  --r-s:10px;
  --r-m:16px;
  --r-l:22px;
  --r-pill:999px;
  --sh-card:0 1px 0 rgba(255,255,255,.06) inset,0 20px 44px -20px rgba(0,0,0,.75);
  --glow:0 0 0 1px rgba(25,224,180,.35),0 10px 30px -8px rgba(25,224,180,.45);
  --sec-pad:clamp(56px,7vw,104px);
  --bs-body-bg:var(--c-surface);
  --bs-body-color:var(--t-1);
  --bs-primary:var(--c-neon);
  --bs-border-color:var(--g-brd);
  --bs-link-color:var(--c-ice);
  --bs-link-hover-color:var(--c-neon);
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-ink);
  color:var(--t-1);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--c-ice);text-decoration:none;transition:color .22s ease}
a:hover{color:var(--c-neon)}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;letter-spacing:.005em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--c-neon);outline-offset:2px;border-radius:4px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1440px){.container{max-width:1320px}}
@media (max-width:575px){.container{padding:0 16px}}

.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;letter-spacing:.02em}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .3s ease,border-color .3s ease,backdrop-filter .3s ease;
}
.site-header.is-scrolled{
  background:rgba(6,13,24,.72);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom-color:var(--g-brd);
}
.nav-wrap{
  height:72px;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
}
.nav-side{display:flex;align-items:center;gap:6px}
.nav-left{justify-content:flex-start}
.nav-right{justify-content:flex-end}
.nav-side li{list-style:none}
.nav-link-x{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:15px;
  color:var(--t-2);
  white-space:nowrap;
}
.nav-link-x::after{
  content:"";
  position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--c-neon);
  border-radius:2px;
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .26s ease;
}
.nav-link-x:hover{color:var(--t-1)}
.nav-link-x:hover::after{transform:scaleX(1)}
.nav-link-x.active{color:var(--t-1)}
.nav-link-x.active::after{transform:scaleX(1)}
.nav-cta{
  display:inline-block;
  margin-left:8px;
  padding:9px 20px;
  border-radius:var(--r-pill);
  background:var(--c-neon);
  color:var(--t-inv);
  font-size:14.5px;
  font-weight:600;
  box-shadow:var(--glow);
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease;
}
.nav-cta:hover{background:#2bf0c4;color:var(--t-inv);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(25,224,180,.5),0 16px 36px -10px rgba(25,224,180,.6)}
.nav-cta:active{transform:translateY(0)}

.brand{display:inline-flex;align-items:center;gap:10px;justify-self:center}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;
  display:grid;place-items:center;
  border-radius:12px;
  background:linear-gradient(150deg,rgba(25,224,180,.22),rgba(127,178,255,.12));
  border:1px solid rgba(25,224,180,.4);
  color:var(--c-neon);
  font-size:19px;font-weight:800;
  box-shadow:0 0 22px -6px rgba(25,224,180,.6) inset;
}
.brand-txt{display:flex;flex-direction:column;line-height:1.15}
.brand-main{font-size:18px;font-weight:700;color:var(--t-1);letter-spacing:.01em}
.brand-sub{font-size:12px;color:var(--c-neon);letter-spacing:.14em}
.brand:hover .brand-main{color:var(--c-neon)}

.nav-toggle{
  justify-self:end;
  width:44px;height:40px;
  display:flex;flex-direction:column;justify-content:center;gap:5px;
  padding:0 10px;
  background:rgba(140,215,255,.06);
  border:1px solid var(--g-brd);
  border-radius:12px;
}
.nav-toggle span{display:block;height:2px;background:var(--t-1);border-radius:2px;transition:transform .25s ease}
.mobile-menu{
  border-top:1px solid var(--g-brd);
  background:rgba(6,13,24,.96);
  backdrop-filter:blur(18px);
}
.menu-inner{display:flex;flex-direction:column;gap:4px;padding:14px 0 22px}
.m-link{
  display:block;
  padding:13px 4px;
  font-size:16px;
  color:var(--t-1);
  border-bottom:1px solid rgba(140,225,255,.08);
}
.m-link.active{color:var(--c-neon)}
.m-cta{margin-top:14px;width:100%}

/* ---------- buttons ---------- */
.btn{font-family:inherit;border-radius:var(--r-pill);font-weight:600;border:1px solid transparent;transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease}
.btn-neon{
  background:var(--c-neon);
  color:var(--t-inv);
  padding:13px 30px;
  font-size:16px;
  box-shadow:var(--glow);
}
.btn-neon:hover{background:#2bf0c4;color:var(--t-inv);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(25,224,180,.5),0 16px 38px -10px rgba(25,224,180,.6)}
.btn-neon:active{transform:translateY(-1px)}
.btn-flame{background:var(--c-flame);color:#1A0A02;padding:13px 30px;font-size:16px;box-shadow:0 10px 30px -10px rgba(255,107,53,.7)}
.btn-flame:hover{background:#ff8259;color:#1A0A02;transform:translateY(-2px)}
.btn-line{
  background:transparent;
  border:1px solid var(--g-brd);
  color:var(--t-1);
  padding:12px 28px;
  font-size:16px;
}
.btn-line:hover{border-color:rgba(25,224,180,.6);color:var(--c-neon);transform:translateY(-2px)}
.btn-sm-x{padding:9px 20px;font-size:14.5px}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;
  padding:clamp(56px,8vw,96px) 0 clamp(44px,6vw,72px);
  background:
    linear-gradient(180deg,rgba(5,12,22,.86),rgba(5,12,22,.94)),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom:1px solid var(--g-brd);
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(140,225,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(140,225,255,.05) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 78% 30%,#000,transparent 68%);
  -webkit-mask-image:radial-gradient(circle at 78% 30%,#000,transparent 68%);
  pointer-events:none;
}
.page-hero::after{
  content:"";
  position:absolute;top:-120px;right:-60px;width:520px;height:520px;
  background:radial-gradient(circle,rgba(25,224,180,.18),transparent 65%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:0 0 18px;font-size:13.5px;color:var(--t-3)}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--t-3)}
.breadcrumb a{color:var(--t-2)}
.breadcrumb a:hover{color:var(--c-neon)}
.breadcrumb .cur{color:var(--t-1)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;margin-bottom:20px;
  border-radius:var(--r-pill);
  background:var(--g-bg);
  border:1px solid var(--g-brd);
  color:var(--c-neon);
  font-size:13px;letter-spacing:.04em;
}
.eyebrow i{font-size:12px}
.page-hero h1{
  font-size:clamp(30px,4.2vw,50px);
  line-height:1.22;
  font-weight:800;
  max-width:900px;
}
.page-hero h1 em{font-style:normal;color:var(--c-neon)}
.hero-sub{
  margin-top:20px;
  max-width:680px;
  font-size:17px;
  color:var(--t-2);
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.tag{
  display:inline-block;
  padding:6px 14px;
  border-radius:var(--r-pill);
  font-size:13px;
  background:rgba(25,224,180,.1);
  border:1px solid rgba(25,224,180,.32);
  color:var(--c-neon);
}
.tag-ice{background:rgba(127,178,255,.1);border-color:rgba(127,178,255,.3);color:var(--c-ice)}

/* ---------- sections ---------- */
section{position:relative}
.sec{padding:var(--sec-pad) 0}
.sec-ink{background:var(--c-ink)}
.sec-surf{background:var(--c-surface)}
.sec-steel{background:linear-gradient(180deg,var(--c-steel),#0A1F36);border-top:1px solid var(--g-brd);border-bottom:1px solid var(--g-brd)}
.sec-head{max-width:720px;margin-bottom:44px}
.sec-head h2{font-size:clamp(23px,3vw,36px);line-height:1.28}
.sec-head p{margin-top:14px;color:var(--t-2);font-size:16.5px}
.sec-kicker{
  display:inline-block;margin-bottom:14px;
  font-size:13px;letter-spacing:.16em;color:var(--c-neon);
}

/* ---------- data strip ---------- */
.data-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.data-card{
  padding:26px 24px;
  border-radius:20px;
  background:var(--g-bg);
  border:1px solid var(--g-brd);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  box-shadow:var(--sh-card);
  transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease;
}
.data-card:hover{transform:translateY(-4px);border-color:rgba(25,224,180,.42);box-shadow:0 1px 0 rgba(255,255,255,.07) inset,0 26px 50px -22px rgba(0,0,0,.8)}
.data-num{
  display:flex;align-items:baseline;gap:6px;
  font-size:clamp(38px,5vw,52px);
  font-weight:800;
  line-height:1;
  color:var(--c-neon);
}
.data-num .unit{font-size:15px;font-weight:600;color:var(--t-2)}
.data-label{margin-top:14px;font-size:17px;font-weight:600;color:var(--t-1)}
.data-note{margin-top:6px;font-size:13.5px;line-height:1.7;color:var(--t-3)}

/* ---------- bento ---------- */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.b-card{
  position:relative;
  display:flex;flex-direction:column;
  padding:24px 26px;
  border-radius:20px;
  background:var(--c-surface-2);
  border:1px solid var(--g-brd);
  box-shadow:var(--sh-card);
  overflow:hidden;
  transition:transform .28s ease,border-color .28s ease;
}
.b-card:hover{transform:translateY(-4px);border-color:rgba(25,224,180,.4)}
.b-card h3{font-size:20px;margin-bottom:10px}
.b-card p{color:var(--t-2);font-size:15.5px}
.b-media{
  position:relative;
  border-radius:var(--r-m);
  overflow:hidden;
  border:1px solid var(--g-brd);
  margin-bottom:20px;
}
.b-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.b-card:hover .b-media img{transform:scale(1.04)}
.b-media.ar-43{aspect-ratio:4/3}
.b-media.ar-1610{aspect-ratio:16/10}
.b-media.ar-169{aspect-ratio:16/9}
.b-a{grid-column:span 7;grid-row:span 2;justify-content:flex-end}
.b-a .b-media{flex:1;min-height:240px;margin-bottom:22px}
.b-b{grid-column:span 5;flex-direction:row;align-items:center;gap:20px;padding:22px}
.b-b .b-media{flex:0 0 42%;margin:0}
.b-c{grid-column:span 5}
.b-d{grid-column:span 3;justify-content:center;background:linear-gradient(160deg,rgba(25,224,180,.12),rgba(18,35,58,.9))}
.b-e{grid-column:span 4}
.b-f{grid-column:span 5}
.b-tag{
  align-self:flex-start;
  margin-bottom:14px;
  padding:5px 12px;
  border-radius:var(--r-pill);
  font-size:12.5px;
  background:rgba(127,178,255,.12);
  border:1px solid rgba(127,178,255,.28);
  color:var(--c-ice);
}
.b-num{font-size:clamp(40px,4.4vw,56px);font-weight:800;line-height:1;color:var(--c-neon)}
.b-num span{font-size:16px;font-weight:600;color:var(--t-2);margin-left:6px}
.b-link{
  display:inline-flex;align-items:center;gap:8px;
  margin-top:18px;
  font-size:14.5px;font-weight:600;color:var(--c-neon);
}
.b-link i{font-size:12px;transition:transform .24s ease}
.b-link:hover i{transform:translateX(4px)}

/* ---------- table block ---------- */
.table-panel{
  border-radius:var(--r-l);
  border:1px solid var(--g-brd);
  background:var(--g-bg);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  overflow:hidden;
}
.table-head{
  padding:22px 26px;
  border-bottom:1px solid var(--g-brd);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
}
.table-head h3{font-size:19px}
.table-head span{font-size:13.5px;color:var(--t-3)}
.table-wrap{overflow-x:auto}
table.data-table{
  width:100%;
  min-width:720px;
  border-collapse:collapse;
  font-size:15px;
}
table.data-table th,table.data-table td{
  padding:16px 26px;
  text-align:left;
  border-bottom:1px solid rgba(140,225,255,.09);
  vertical-align:top;
}
table.data-table thead th{
  font-size:13.5px;
  font-weight:600;
  color:var(--t-3);
  letter-spacing:.06em;
  background:rgba(14,42,71,.5);
  white-space:nowrap;
}
table.data-table tbody tr:nth-child(odd){background:rgba(140,215,255,.03)}
table.data-table tbody tr:hover{background:rgba(25,224,180,.06)}
table.data-table tbody tr:last-child td{border-bottom:none}
td.cell-name{color:var(--t-1);font-weight:600;white-space:nowrap}
td.cell-name i{color:var(--c-neon);margin-right:8px;font-size:13px}
td.cell-desc{color:var(--t-2)}
td.cell-way{color:var(--c-ice);white-space:nowrap;font-size:14px}

/* ---------- faq ---------- */
.accordion-x .accordion-item{
  background:transparent;
  border:1px solid var(--g-brd);
  border-radius:var(--r-m);
  margin-bottom:14px;
  overflow:hidden;
}
.accordion-x .accordion-button{
  background:var(--g-bg);
  color:var(--t-1);
  font-size:17px;
  font-weight:600;
  padding:20px 22px;
  border:none;
  box-shadow:none;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.accordion-x .accordion-button:not(.collapsed){
  background:rgba(25,224,180,.08);
  color:var(--t-1);
  box-shadow:none;
}
.accordion-x .accordion-button:focus{box-shadow:none;border-color:transparent}
.accordion-x .accordion-button::after{display:none}
.acc-icon{
  position:relative;flex:0 0 24px;width:24px;height:24px;border-radius:50%;
  border:1px solid rgba(25,224,180,.45);
}
.acc-icon::before,.acc-icon::after{
  content:"";position:absolute;left:6px;right:6px;top:50%;height:2px;
  background:var(--c-neon);transform:translateY(-50%);
}
.acc-icon::after{transform:translateY(-50%) rotate(90deg);transition:transform .28s ease}
.accordion-button:not(.collapsed) .acc-icon::after{transform:translateY(-50%) rotate(0deg)}
.accordion-x .accordion-body{
  padding:4px 22px 22px;
  color:var(--t-2);
  font-size:15.5px;
  line-height:1.9;
  border-left:3px solid var(--c-neon);
  margin-left:0;
}

/* ---------- cta ---------- */
.cta-band{
  position:relative;
  padding:var(--sec-pad) 0;
  background:
    linear-gradient(180deg,rgba(5,12,22,.88),rgba(5,12,22,.94)),
    url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
  border-top:1px solid var(--g-brd);
  border-bottom:1px solid var(--g-brd);
}
.cta-box{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:32px;
  padding:clamp(28px,4vw,46px);
  border-radius:var(--r-l);
  background:var(--g-bg);
  border:1px solid rgba(25,224,180,.3);
  box-shadow:0 0 0 1px rgba(25,224,180,.12) inset,0 30px 70px -30px rgba(0,0,0,.9);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
}
.cta-box h2{font-size:clamp(22px,2.8vw,32px);max-width:600px}
.cta-box p{margin-top:12px;color:var(--t-2);max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.qr-ph{
  width:112px;height:112px;flex:0 0 112px;
  border-radius:var(--r-m);
  border:1px dashed rgba(140,225,255,.35);
  background:rgba(5,12,22,.5);
  display:grid;place-items:center;
  text-align:center;
  font-size:12.5px;line-height:1.5;color:var(--t-3);
}

/* ---------- footer ---------- */
.site-footer{background:var(--c-ink);padding:clamp(52px,6vw,80px) 0 0;border-top:1px solid var(--g-brd)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:36px}
.footer-brand p{margin-top:18px;color:var(--t-2);font-size:14.5px;line-height:1.85;max-width:340px}
.f-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.f-title{font-size:15px;color:var(--t-1);margin-bottom:16px;letter-spacing:.04em}
.f-list li{margin-bottom:10px}
.f-list a{position:relative;color:var(--t-2);font-size:14.5px;display:inline-block}
.f-list a::after{content:"";position:absolute;left:0;bottom:-2px;width:100%;height:1px;background:var(--c-neon);transform:scaleX(0);transform-origin:left;transition:transform .26s ease}
.f-list a:hover{color:var(--c-neon)}
.f-list a:hover::after{transform:scaleX(1)}
.f-contact li{display:flex;gap:10px;margin-bottom:14px;color:var(--t-2);font-size:14px;line-height:1.75}
.f-contact i{color:var(--c-neon);margin-top:5px;font-size:13px}
.footer-bottom{
  margin-top:clamp(36px,5vw,56px);
  padding:20px 0;
  border-top:1px solid var(--g-brd);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13.5px;color:var(--t-3);
}
.footer-bottom a{color:var(--t-3)}
.footer-bottom a:hover{color:var(--c-neon)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
.reveal.is-in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .nav-link-x{padding:8px 9px;font-size:14.5px}
}
@media (max-width:991px){
  .nav-wrap{height:60px;grid-template-columns:auto 1fr auto}
  .brand{justify-self:center}
  .data-strip{grid-template-columns:repeat(2,1fr)}
  .b-a,.b-b,.b-c,.b-d,.b-e,.b-f{grid-column:span 12;grid-row:auto}
  .b-b{flex-direction:row}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:767px){
  body{font-size:16px}
  .page-hero{padding:48px 0 40px}
  .b-b{flex-direction:column;align-items:stretch}
  .b-b .b-media{flex:none;width:100%}
  .cta-box{flex-direction:column;align-items:flex-start}
  .qr-ph{width:100%;height:90px;flex:none}
}
@media (max-width:575px){
  .data-strip{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .btn-neon,.btn-line,.btn-flame{width:100%;text-align:center}
  .cta-actions{width:100%}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category4 */
:root{
  --c-ink:#050C16;
  --c-surface:#0B1727;
  --c-surface-2:#12233A;
  --c-steel:#0E2A47;
  --c-neon:#19E0B4;
  --c-flame:#FF6B35;
  --c-ice:#7FB2FF;
  --t-1:#EAF3FB;
  --t-2:#9DB3C9;
  --t-3:#6C8299;
  --t-inv:#050C16;
  --g-bg:rgba(140,215,255,.06);
  --g-brd:rgba(140,225,255,.14);
  --g-blur:16px;
  --r-s:10px;
  --r-m:16px;
  --r-l:22px;
  --r-card:20px;
  --r-pill:999px;
  --sh-card:0 1px 0 rgba(255,255,255,.06) inset,0 20px 44px -20px rgba(0,0,0,.75);
  --sh-neon:0 0 0 1px rgba(25,224,180,.35),0 10px 30px -8px rgba(25,224,180,.45);
  --sh-neon-hi:0 0 0 1px rgba(25,224,180,.5),0 16px 42px -8px rgba(25,224,180,.6);
  --ff:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --ff-num:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --bs-body-bg:#0B1727;
  --bs-body-color:#EAF3FB;
  --bs-body-font-family:var(--ff);
  --bs-border-color:rgba(140,225,255,.14);
  --bs-primary:#19E0B4;
  --bs-primary-rgb:25,224,180;
  --bs-link-color:#7FB2FF;
  --bs-link-hover-color:#19E0B4;
  --bs-border-radius:16px;
  --bs-body-line-height:1.85;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--ff);
  font-size:16px;
  line-height:1.85;
  color:var(--t-1);
  background:var(--c-surface);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .22s ease}
a:hover{color:var(--c-neon)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;letter-spacing:0}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.num{font-family:var(--ff-num);font-variant-numeric:tabular-nums;letter-spacing:.02em}
::selection{background:rgba(25,224,180,.28);color:#fff}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:16px;
  padding-right:16px;
}
@media (min-width:768px){
  .container{padding-left:24px;padding-right:24px}
}
@media (min-width:1440px){
  .container{max-width:1320px}
}

/* ============ 按钮体系 ============ */
.btn-neon{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 26px;
  border:0;
  border-radius:var(--r-pill);
  background:linear-gradient(135deg,#19E0B4,#12c79f);
  color:var(--t-inv);
  font-size:15px;
  font-weight:700;
  letter-spacing:0;
  cursor:pointer;
  box-shadow:var(--sh-neon);
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease;
}
.btn-neon:hover{transform:translateY(-2px);box-shadow:var(--sh-neon-hi);color:var(--t-inv)}
.btn-neon:active{transform:translateY(1px)}
.btn-neon:focus-visible{outline:2px solid var(--c-neon);outline-offset:2px}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 24px;
  border-radius:var(--r-pill);
  border:1px solid rgba(140,225,255,.28);
  background:var(--g-bg);
  color:var(--t-1);
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  backdrop-filter:blur(var(--g-blur));
  transition:border-color .2s ease,color .2s ease,transform .2s ease,background .2s ease;
}
.btn-ghost:hover{border-color:var(--c-neon);color:var(--c-neon);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-ghost:focus-visible{outline:2px solid var(--c-neon);outline-offset:2px}
.btn-block{width:100%}

.tag{
  display:inline-flex;
  align-items:center;
  padding:5px 12px;
  border-radius:var(--r-pill);
  font-size:12.5px;
  line-height:1.6;
  color:var(--c-neon);
  background:rgba(25,224,180,.1);
  border:1px solid rgba(25,224,180,.28);
}
.tag-ice{
  color:var(--c-ice);
  background:rgba(127,178,255,.1);
  border-color:rgba(127,178,255,.28);
}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:transparent;
  transition:background .3s ease,backdrop-filter .3s ease,border-color .3s ease;
  border-bottom:1px solid transparent;
}
.site-header.scrolled{
  background:rgba(6,13,24,.72);
  backdrop-filter:blur(18px);
  border-bottom-color:var(--g-brd);
}
.nav-wrap{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  height:72px;
}
.nav-side{
  display:flex;
  align-items:center;
  gap:4px;
  flex:1 1 0;
  min-width:0;
}
.nav-right{justify-content:flex-end}
.nav-link-x{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:15px;
  color:var(--t-2);
  border-radius:var(--r-s);
  white-space:nowrap;
  transition:color .22s ease;
}
.nav-link-x::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--c-neon);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .26s ease;
  box-shadow:0 0 10px rgba(25,224,180,.7);
}
.nav-link-x:hover{color:var(--t-1)}
.nav-link-x:hover::after{transform:scaleX(1)}
.nav-link-x.active{color:var(--c-neon);font-weight:600}
.nav-link-x.active::after{transform:scaleX(1)}
.nav-link-x:focus-visible{outline:2px solid var(--c-neon);outline-offset:2px}
.nav-cta{
  display:inline-flex;
  align-items:center;
  padding:9px 20px;
  margin-left:8px;
  border-radius:var(--r-pill);
  background:linear-gradient(135deg,#19E0B4,#12c79f);
  color:var(--t-inv);
  font-size:14px;
  font-weight:700;
  box-shadow:var(--sh-neon);
  transition:transform .2s ease,box-shadow .2s ease;
}
.nav-cta:hover{color:var(--t-inv);transform:translateY(-2px);box-shadow:var(--sh-neon-hi)}
.nav-cta:active{transform:translateY(1px)}
.nav-cta:focus-visible{outline:2px solid var(--c-neon);outline-offset:2px}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  text-decoration:none;
}
.brand-mark{
  width:40px;
  height:40px;
  border-radius:12px;
  display:grid;
  place-items:center;
  font-size:19px;
  font-weight:800;
  color:var(--t-inv);
  background:linear-gradient(135deg,#19E0B4,#0FA98A);
  box-shadow:0 0 0 1px rgba(25,224,180,.35),0 10px 30px -10px rgba(25,224,180,.55);
}
.brand-txt{display:flex;flex-direction:column;line-height:1.15}
.brand-main{font-size:18px;font-weight:700;color:var(--t-1)}
.brand-sub{font-size:12px;color:var(--c-neon);letter-spacing:.02em}
.brand:hover .brand-main{color:var(--c-neon)}

.nav-toggle{
  width:44px;
  height:44px;
  border-radius:12px;
  background:var(--g-bg);
  border:1px solid var(--g-brd);
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  cursor:pointer;
  transition:border-color .2s ease;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--t-1);transition:transform .2s ease}
.nav-toggle:hover{border-color:var(--c-neon)}
.nav-toggle:focus-visible{outline:2px solid var(--c-neon);outline-offset:2px}

.mobile-menu{
  background:rgba(8,17,30,.96);
  backdrop-filter:blur(18px);
  border-bottom:1px solid var(--g-brd);
}
.menu-inner{display:flex;flex-direction:column;gap:2px;padding:14px 0 22px}
.m-link{
  padding:13px 4px;
  font-size:16px;
  color:var(--t-2);
  border-bottom:1px solid rgba(140,225,255,.08);
  transition:color .2s ease,padding-left .2s ease;
}
.m-link:hover{color:var(--c-neon);padding-left:8px}
.m-link.active{color:var(--c-neon);font-weight:600}
.m-cta{margin-top:16px}

@media (max-width:991px){
  .nav-wrap{height:60px}
  .brand{position:absolute;left:50%;transform:translateX(-50%)}
  .brand-mark{width:34px;height:34px;border-radius:10px;font-size:16px}
  .brand-main{font-size:16px}
  .brand-sub{font-size:11px}
}

/* ============ 页头带 ============ */
.page-head{
  position:relative;
  padding:clamp(46px,6vw,80px) 0 clamp(36px,4.4vw,54px);
  background-image:
    radial-gradient(760px 340px at 10% -10%,rgba(25,224,180,.16),transparent 62%),
    linear-gradient(180deg,rgba(5,12,22,.93),rgba(5,12,22,.8)),
    url('/assets/images/backpic/back-2.webp');
  background-size:auto,auto,cover;
  background-position:center,center,center;
  background-repeat:no-repeat;
  border-bottom:1px solid var(--g-brd);
  overflow:hidden;
}
.page-head::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(140,225,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(140,225,255,.05) 1px,transparent 1px);
  background-size:52px 52px;
  mask-image:radial-gradient(600px 300px at 20% 30%,#000,transparent 78%);
  -webkit-mask-image:radial-gradient(600px 300px at 20% 30%,#000,transparent 78%);
  pointer-events:none;
}
.page-head .container{position:relative;z-index:1}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--t-3);margin-bottom:16px}
.crumb a{color:var(--t-3)}
.crumb a:hover{color:var(--c-neon)}
.crumb .sep{color:rgba(140,225,255,.3)}
.crumb .cur{color:var(--t-2)}
.page-head h1{
  font-size:clamp(26px,3.6vw,42px);
  line-height:1.25;
  font-weight:800;
  max-width:860px;
}
.page-head .lead-x{
  margin-top:16px;
  max-width:720px;
  font-size:16.5px;
  color:var(--t-2);
}
.head-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.head-stats{
  display:flex;
  flex-wrap:wrap;
  gap:clamp(20px,4vw,52px);
  margin-top:30px;
  padding-top:24px;
  border-top:1px solid var(--g-brd);
}
.head-stats .hs-item{min-width:120px}
.head-stats .hs-num{font-family:var(--ff-num);font-variant-numeric:tabular-nums;font-size:clamp(22px,2.6vw,30px);font-weight:700;color:var(--c-neon);line-height:1.2}
.head-stats .hs-lb{font-size:13px;color:var(--t-3);margin-top:4px}

/* ============ 板块通用 ============ */
.sec{padding:clamp(56px,7vw,104px) 0}
.sec-ink{background:var(--c-ink)}
.sec-surface{background:var(--c-surface)}
.sec-steel{background:var(--c-steel);border-top:1px solid var(--g-brd);border-bottom:1px solid var(--g-brd)}
.sec-head{max-width:780px;margin-bottom:clamp(26px,3.2vw,42px)}
.sec-head h2{font-size:clamp(23px,3vw,36px);line-height:1.28;font-weight:700}
.sec-head p{margin-top:14px;color:var(--t-2);font-size:16px}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-bottom:12px;
  font-size:13px;
  letter-spacing:.06em;
  color:var(--c-neon);
}
.eyebrow::before{content:"";width:20px;height:2px;border-radius:2px;background:var(--c-neon);box-shadow:0 0 8px rgba(25,224,180,.7)}

/* ============ FAQ 手风琴 ============ */
.faq-x .accordion-item{
  background:var(--g-bg);
  border:1px solid var(--g-brd);
  border-radius:var(--r-m);
  margin-bottom:12px;
  overflow:hidden;
  backdrop-filter:blur(var(--g-blur));
  transition:border-color .22s ease,box-shadow .22s ease;
}
.faq-x .accordion-item:hover{border-color:rgba(140,225,255,.26)}
.faq-x .accordion-button{
  position:relative;
  width:100%;
  padding:19px 56px 19px 22px;
  background:transparent;
  border:0;
  border-radius:0;
  color:var(--t-1);
  font-size:17px;
  font-weight:600;
  line-height:1.6;
  text-align:left;
  box-shadow:none;
  transition:background .22s ease,color .22s ease,box-shadow .22s ease;
}
.faq-x .accordion-button:not(.collapsed){
  background:rgba(25,224,180,.07);
  color:var(--c-neon);
  box-shadow:inset 3px 0 0 var(--c-neon);
}
.faq-x .accordion-button:focus,
.faq-x .accordion-button:focus-visible{
  outline:none;
  box-shadow:inset 0 0 0 1px rgba(25,224,180,.5);
  z-index:2;
}
.faq-x .accordion-button::after{display:none!important}
.q-ic{
  position:absolute;
  right:22px;
  top:50%;
  width:16px;
  height:16px;
  transform:translateY(-50%);
}
.q-ic::before,
.q-ic::after{
  content:"";
  position:absolute;
  background:var(--c-neon);
  border-radius:2px;
  transition:transform .26s ease,opacity .22s ease;
  box-shadow:0 0 8px rgba(25,224,180,.6);
}
.q-ic::before{left:0;top:7px;width:16px;height:2px}
.q-ic::after{left:7px;top:0;width:2px;height:16px}
.accordion-button:not(.collapsed) .q-ic::after{opacity:0;transform:scaleY(.2)}
.faq-x .accordion-body{
  padding:2px 22px 22px;
  color:var(--t-2);
  font-size:15.5px;
  line-height:1.85;
}
.faq-x .accordion-body strong{color:var(--t-1);font-weight:600}

/* ============ 提交表单卡 ============ */
.ask-card{
  position:sticky;
  top:96px;
  padding:26px;
  border-radius:var(--r-card);
  background:var(--g-bg);
  border:1px solid var(--g-brd);
  backdrop-filter:blur(var(--g-blur));
  box-shadow:var(--sh-card);
}
.ask-card h3{font-size:20px;font-weight:700}
.ask-sub{margin-top:8px;margin-bottom:22px;font-size:14px;color:var(--t-2);line-height:1.75}
.ffield{position:relative;margin-bottom:16px}
.ffield .form-control{
  width:100%;
  height:52px;
  padding:20px 14px 6px;
  background:rgba(5,12,22,.55);
  border:1px solid var(--g-brd);
  border-radius:12px;
  color:var(--t-1);
  font-size:15px;
  font-family:var(--ff);
  box-shadow:none;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.ffield .form-control:focus{
  background:rgba(5,12,22,.78);
  border-color:var(--c-neon);
  box-shadow:0 0 0 3px rgba(25,224,180,.18);
  outline:none;
}
.ffield label{
  position:absolute;
  left:15px;
  top:50%;
  transform:translateY(-50%);
  margin:0;
  color:var(--t-3);
  font-size:15px;
  pointer-events:none;
  transition:top .18s ease,font-size .18s ease,color .18s ease,transform .18s ease;
}
.ffield .form-control:focus + label,
.ffield .form-control:not(:placeholder-shown) + label{
  top:14px;
  font-size:11.5px;
  transform:none;
  color:var(--c-neon);
  letter-spacing:.02em;
}
.ffield .form-control.is-err{
  border-color:#FF5C5C;
  box-shadow:0 0 0 3px rgba(255,92,92,.16);
}
.f-err{display:none;margin:-8px 0 14px;font-size:13px;color:#FF5C5C}
.f-err.show{display:block}
.chip-block{margin-bottom:18px}
.chip-title{display:block;margin-bottom:10px;font-size:13px;color:var(--t-2);letter-spacing:.02em}
.chip-group{display:flex;flex-wrap:wrap;gap:8px}
.chip-group input{position:absolute;width:0;height:0;opacity:0;pointer-events:none}
.chip-group label{
  cursor:pointer;
  padding:7px 14px;
  border-radius:var(--r-pill);
  font-size:13.5px;
  color:var(--t-2);
  background:rgba(5,12,22,.5);
  border:1px solid var(--g-brd);
  transition:color .2s ease,background .2s ease,border-color .2s ease,transform .2s ease;
}
.chip-group label:hover{border-color:rgba(25,224,180,.5);color:var(--t-1)}
.chip-group input:checked + label{
  color:var(--t-inv);
  font-weight:600;
  background:var(--c-neon);
  border-color:var(--c-neon);
  box-shadow:0 8px 22px -10px rgba(25,224,180,.8);
}
.chip-group input:focus-visible + label{outline:2px solid var(--c-neon);outline-offset:2px}
.ffield-area textarea{
  width:100%;
  min-height:112px;
  padding:14px;
  background:rgba(5,12,22,.55);
  border:1px solid var(--g-brd);
  border-radius:12px;
  color:var(--t-1);
  font-size:14.5px;
  line-height:1.7;
  font-family:var(--ff);
  resize:vertical;
  box-shadow:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.ffield-area textarea::placeholder{color:var(--t-3)}
.ffield-area textarea:focus{
  border-color:var(--c-neon);
  box-shadow:0 0 0 3px rgba(25,224,180,.18);
  outline:none;
}
.ask-note{margin-top:14px;font-size:12.5px;line-height:1.7;color:var(--t-3)}
.f-ok{
  display:none;
  margin-top:14px;
  padding:12px 14px;
  border-radius:12px;
  font-size:13.5px;
  color:var(--c-neon);
  background:rgba(25,224,180,.08);
  border:1px solid rgba(25,224,180,.28);
}
.f-ok.show{display:block}

/* ============ 自查清单 ============ */
.check-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(20px,3vw,34px)}
.check-col{
  padding:26px;
  border-radius:var(--r-card);
  background:var(--g-bg);
  border:1px solid var(--g-brd);
  backdrop-filter:blur(var(--g-blur));
  box-shadow:var(--sh-card);
}
.check-col h3{font-size:18px;font-weight:700;margin-bottom:6px}
.check-col .col-note{font-size:13.5px;color:var(--t-3);margin-bottom:10px}
.check-list li{
  display:flex;
  gap:12px;
  padding:13px 0;
  border-bottom:1px dashed rgba(140,225,255,.12);
  font-size:15.5px;
  line-height:1.75;
  color:var(--t-2);
}
.check-list li:last-child{border-bottom:0;padding-bottom:0}
.check-list i{
  flex:0 0 auto;
  width:22px;
  height:22px;
  margin-top:5px;
  border-radius:50%;
  display:grid;
  place-items:center;
  font-size:10.5px;
  color:var(--c-neon);
  background:rgba(25,224,180,.12);
  box-shadow:0 0 0 1px rgba(25,224,180,.3) inset;
}

/* ============ 支持通道 ============ */
.support-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:clamp(24px,4vw,52px);
  align-items:center;
}
.support-media{
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--g-brd);
  box-shadow:var(--sh-card);
  background:var(--c-surface-2);
}
.support-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.support-txt h2{font-size:clamp(22px,2.8vw,32px);line-height:1.3;font-weight:700}
.support-txt > p{margin-top:14px;color:var(--t-2);font-size:16px}
.chan-list{margin-top:24px}
.chan-list li{
  display:flex;
  gap:14px;
  padding:16px 0;
  border-top:1px solid var(--g-brd);
}
.chan-list li:last-child{border-bottom:1px solid var(--g-brd)}
.chan-ic{
  flex:0 0 auto;
  width:38px;
  height:38px;
  border-radius:12px;
  display:grid;
  place-items:center;
  color:var(--c-neon);
  font-size:14px;
  background:rgba(25,224,180,.1);
  box-shadow:0 0 0 1px rgba(25,224,180,.26) inset;
}
.chan-list h4{font-size:16px;font-weight:600}
.chan-list p{margin-top:4px;font-size:14.5px;color:var(--t-2);line-height:1.75}

/* ============ 底部 CTA ============ */
.cta-band{
  position:relative;
  padding:clamp(52px,6vw,88px) 0;
  background-image:
    linear-gradient(180deg,rgba(5,12,22,.86),rgba(5,12,22,.94)),
    url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  border-top:1px solid var(--g-brd);
}
.cta-box{
  display:grid;
  grid-template-columns:1.5fr 1fr;
  gap:clamp(22px,3vw,44px);
  align-items:center;
  padding:clamp(26px,3.4vw,44px);
  border-radius:var(--r-l);
  background:rgba(11,23,39,.62);
  border:1px solid rgba(140,225,255,.2);
  backdrop-filter:blur(var(--g-blur));
  box-shadow:0 0 0 1px rgba(25,224,180,.12) inset,0 26px 60px -30px rgba(0,0,0,.9);
}
.cta-box h2{font-size:clamp(22px,2.8vw,34px);line-height:1.3;font-weight:700}
.cta-box .cta-txt p{margin-top:12px;color:var(--t-2);font-size:15.5px;max-width:560px}
.cta-act{display:flex;flex-direction:column;align-items:flex-start;gap:12px}
.cta-note{font-size:13px;color:var(--t-3);line-height:1.7}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--c-ink);
  border-top:1px solid var(--g-brd);
  padding-top:clamp(48px,5vw,72px);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.4fr;
  gap:clamp(24px,3vw,40px);
}
.footer-brand p{margin-top:16px;max-width:340px;font-size:14.5px;line-height:1.8;color:var(--t-2)}
.f-badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.f-title{
  position:relative;
  padding-left:12px;
  margin-bottom:18px;
  font-size:15px;
  font-weight:700;
  color:var(--t-1);
}
.f-title::before{
  content:"";
  position:absolute;
  left:0;
  top:5px;
  bottom:5px;
  width:3px;
  border-radius:2px;
  background:var(--c-neon);
  box-shadow:0 0 8px rgba(25,224,180,.7);
}
.f-list li{margin-bottom:11px}
.f-list a{
  position:relative;
  display:inline-block;
  font-size:14.5px;
  color:var(--t-2);
}
.f-list a::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-2px;
  height:1px;
  background:var(--c-neon);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s ease;
}
.f-list a:hover{color:var(--c-neon)}
.f-list a:hover::after{transform:scaleX(1)}
.f-contact li{display:flex;gap:10px;margin-bottom:13px;font-size:14px;line-height:1.72;color:var(--t-2)}
.f-contact i{color:var(--c-neon);margin-top:5px;flex:0 0 auto}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
  margin-top:clamp(32px,4vw,48px);
  padding:20px 0;
  border-top:1px solid var(--g-brd);
  font-size:13.5px;
  color:var(--t-3);
}
.footer-bottom a{color:var(--t-3)}
.footer-bottom a:hover{color:var(--c-neon)}

/* ============ 滚动显现 ============ */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:28px}
  .footer-grid > div:last-child{grid-column:1 / -1}
}
@media (max-width:991px){
  .ask-card{position:static;top:auto}
  .check-grid{grid-template-columns:1fr}
  .support-row{grid-template-columns:1fr}
  .cta-box{grid-template-columns:1fr}
  .cta-act{width:100%}
  .cta-act .btn-neon{width:100%}
  .page-head h1{max-width:100%}
}
@media (max-width:767px){
  body{font-size:15.5px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
  .footer-grid > div:last-child{grid-column:1 / -1}
  .head-stats{gap:18px 28px}
  .check-col{padding:20px}
  .ask-card{padding:20px}
  .faq-x .accordion-button{font-size:15.5px;padding:16px 50px 16px 18px}
  .faq-x .accordion-body{padding:0 18px 18px}
  .btn-neon,.btn-ghost{padding:12px 22px}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr}
  .head-tags{gap:8px}
  .chip-group label{font-size:12.5px;padding:6px 12px}
}