/* roulang page: index */
:root{
  --night-0:#04070F;
  --night-1:#050B16;
  --night-2:#081226;
  --night-3:#0B1830;
  --blue:#3D7FFF;
  --blue-soft:#6B9CFF;
  --cyan:#59E3E0;
  --ice:#6FE3FF;
  --gold:#F6C76D;
  --text-1:#F2F7FF;
  --text-2:#C7D2E8;
  --text-3:#7E8FB0;
  --line:rgba(138,168,255,.16);
  --line-soft:rgba(138,168,255,.10);
  --glass:rgba(255,255,255,.05);
  --glass-strong:rgba(16,28,54,.76);
  --r-lg:20px;
  --r-md:16px;
  --r-sm:12px;
  --shadow:0 16px 50px rgba(0,0,0,.32);
  --glow:0 0 0 1px rgba(89,227,224,.16),0 14px 42px rgba(61,127,255,.16);
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC","Hiragino Sans GB",system-ui,sans-serif;
  --font-num:"DIN Alternate","Bahnschrift","Inter","Avenir Next",var(--font-cn);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--night-1);
  background-image:
    radial-gradient(900px 460px at 84% -4%,rgba(35,88,174,.24),transparent 62%),
    radial-gradient(720px 320px at 8% 26%,rgba(21,56,116,.16),transparent 60%),
    linear-gradient(180deg,#051020,#04070F 54%,#050B16);
  color:var(--text-2);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .2s,background .25s,border-color .25s,box-shadow .25s,transform .25s}
button,input{font-family:inherit}
ul,ol{padding:0;margin:0}
p{margin:0 0 1em}
h1,h2,h3,h4{margin:0;color:var(--text-1);line-height:1.28;font-weight:700}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
::selection{background:rgba(61,127,255,.35);color:#fff}
.grid-container{max-width:1200px;margin:0 auto;padding:0 24px}
.grid-x{display:flex;flex-wrap:wrap}
.cell{flex:0 0 auto;width:100%}
.section{padding:88px 0;position:relative}
.section--tight{padding:56px 0}
.section--alt{background:linear-gradient(180deg,rgba(6,14,29,.44),rgba(6,14,29,.05))}
.text-glow{color:var(--cyan)}
.text-dim{color:var(--text-3)}
.section-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;color:var(--ice);
  font-weight:600;margin-bottom:14px;
}
.section-kicker::before{content:"";width:22px;height:1px;background:linear-gradient(90deg,var(--cyan),transparent)}
.section-title{font-size:clamp(25px,3vw,34px);letter-spacing:.02em}
.section-sub{max-width:760px;color:var(--text-3);font-size:15px;margin-top:12px}
.section-head{margin-bottom:44px}
.section-center .section-head{text-align:center}
.section-center .section-kicker::before{display:none}
.section-center .section-sub{margin-left:auto;margin-right:auto}

/* header */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(5,11,22,.76);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line-soft);
}
.site-header.is-scrolled{box-shadow:0 8px 30px rgba(0,0,0,.25)}
.header-top{transition:max-height .3s ease,opacity .3s;overflow:hidden}
.header-top__inner{display:flex;align-items:center;justify-content:space-between;height:66px;gap:18px}
.site-header.is-scrolled .header-top{max-height:0;opacity:0}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand__logo{display:inline-flex;align-items:center;gap:12px}
.brand__mark{
  width:38px;height:38px;position:relative;flex:none;
  border-radius:13px;
  background:linear-gradient(145deg,rgba(61,127,255,.28),rgba(89,227,224,.10));
  border:1px solid rgba(89,227,224,.30);
  display:grid;place-items:center;font-weight:800;font-size:17px;color:#fff;
  letter-spacing:-.5px;
  box-shadow:inset 0 0 16px rgba(111,227,255,.16),0 4px 14px rgba(20,88,184,.2);
}
.brand__mark::after{content:"";position:absolute;left:-4px;right:-4px;top:-4px;bottom:-4px;border:1px dashed rgba(111,227,255,.28);border-radius:17px;pointer-events:none}
.brand__name{font-size:18px;font-weight:800;color:#fff;letter-spacing:.02em;white-space:nowrap}
.brand__name span{color:var(--ice);font-weight:500;margin-left:4px;font-size:13px}
.header-top__actions{display:flex;align-items:center;gap:14px;margin-left:auto}
.header-user{
  display:inline-flex;align-items:center;gap:8px;height:36px;padding:0 16px;border-radius:999px;
  border:1px solid rgba(111,227,255,.28);color:var(--ice);font-size:13px;
  background:rgba(111,227,255,.05);
}
.header-user:hover{border-color:var(--cyan);color:#fff;box-shadow:0 0 18px rgba(89,227,224,.15)}
.header-user i{font-size:13px}
.menu-trigger{
  display:none;height:38px;padding:0 13px;border-radius:11px;border:1px solid var(--line);
  background:rgba(255,255,255,.05);color:#fff;cursor:pointer;font-size:17px;
}
/* nav row */
.nav-bar{border-top:1px solid var(--line-soft);transition:opacity .25s;}
.site-header.is-scrolled .nav-bar{border-top-color:transparent}
.nav-inner{display:flex;align-items:center;min-height:51px;gap:20px}
.primary-nav ul{display:flex;align-items:center;list-style:none}
.primary-nav a{
  position:relative;display:block;padding:12px 16px;font-size:15px;color:var(--text-2);
  font-weight:600;white-space:nowrap;
}
.primary-nav a::after{content:"";position:absolute;left:15px;right:15px;bottom:7px;height:2px;border-radius:3px;background:linear-gradient(90deg,var(--cyan),var(--blue));opacity:0;transform:scaleX(.4);transition:.25s}
.primary-nav a:hover{color:#fff}
.primary-nav a.active{color:#fff}
.primary-nav a.active::after,.primary-nav a:hover::after{opacity:1;transform:scaleX(1)}
.nav-tools{display:flex;align-items:center;gap:14px;margin-left:auto}
.nav-search{display:flex;align-items:center;position:relative}
.nav-search input{
  height:34px;width:180px;border-radius:999px;border:1px solid var(--line-soft);
  background:rgba(255,255,255,.04);color:var(--text-1);padding:0 32px 0 15px;font-size:13px;
  transition:border-color .2s,box-shadow .2s,width .25s;
}
.nav-search input::placeholder{color:#617290}
.nav-search input:focus{outline:0;border-color:rgba(89,227,224,.45);width:220px;box-shadow:0 0 0 3px rgba(89,227,224,.08)}
.nav-search button{
  position:absolute;right:5px;border:0;background:transparent;color:#7e93c2;font-size:13px;
  cursor:pointer;height:26px;width:26px;border-radius:50%;display:grid;place-items:center;
}
.nav-search button:hover{color:var(--ice)}
.hot-list{display:flex;align-items:center;gap:7px;list-style:none;font-size:12px;white-space:nowrap}
.hot-list__label{color:var(--text-3);margin-right:2px}
.hot-list a{display:inline-block;color:#8da0c7;border:1px solid var(--line-soft);border-radius:999px;padding:3px 10px;line-height:1.5}
.hot-list a:hover{color:var(--ice);border-color:rgba(89,227,224,.5)}
/* mobile drawer */
.screen-mask{position:fixed;inset:0;background:rgba(2,5,10,.72);z-index:2000;opacity:0;visibility:hidden;transition:.3s}
.screen-mask.is-open{opacity:1;visibility:visible}
.mobile-drawer{
  position:fixed;top:0;right:0;z-index:2100;width:min(88vw,380px);height:100%;
  background:linear-gradient(165deg,#0A1527 0%,#050B16 72%);border-left:1px solid var(--line);
  padding:24px;transform:translateX(102%);transition:transform .34s ease;display:flex;flex-direction:column;gap:22px;
  overflow-y:auto;box-shadow:-18px 0 50px rgba(0,0,0,.38);
}
.mobile-drawer.is-open{transform:none}
.drawer-top{display:flex;align-items:center;justify-content:space-between}
.drawer-close{width:38px;height:38px;border-radius:12px;border:1px solid var(--line);background:rgba(255,255,255,.05);color:#fff;cursor:pointer}
.drawer-nav ul{list-style:none}
.drawer-nav a{display:flex;align-items:center;gap:10px;padding:12px 10px;color:var(--text-2);font-size:16px;border-radius:12px;font-weight:600}
.drawer-nav a i{width:20px;color:var(--ice);font-size:14px}
.drawer-nav a:hover{background:rgba(255,255,255,.06);color:#fff}
.drawer-nav a.active{color:#fff;background:rgba(89,227,224,.10)}
.drawer-hot h4{font-size:14px;color:rgba(242,247,255,.62);font-weight:500;margin-bottom:10px}
.drawer-hot .hot-list{flex-wrap:wrap;gap:8px}
.drawer-members{margin-top:auto;display:flex;gap:10px}
.drawer-members a{flex:1;text-align:center}

/* hero */
.hero{
  position:relative;isolation:isolate;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center 65%;
  display:flex;align-items:center;padding:78px 0 70px;min-height:min(680px,calc(100vh - 112px));
}
.hero::before{
  content:"";position:absolute;inset:0;z-index:-2;
  background:linear-gradient(90deg,rgba(4,8,17,.82) 16%,rgba(5,12,25,.57) 58%,rgba(5,10,22,.55)),linear-gradient(180deg,rgba(4,7,15,.2),rgba(4,7,15,.48));
}
.hero::after{content:"";position:absolute;inset:0;z-index:-1;background:radial-gradient(760px 320px at 88% 28%,rgba(61,127,255,.16),transparent 70%)}
.hero-label{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--ice);border:1px solid rgba(111,227,255,.30);background:rgba(18,32,64,.42);border-radius:999px;padding:5px 14px;margin-bottom:22px;letter-spacing:.04em}
.hero h1{font-size:clamp(30px,4.3vw,48px);line-height:1.18;font-weight:800;letter-spacing:.01em;max-width:720px;color:#fff;margin-bottom:22px}
.hero h1 .brand-text{background:linear-gradient(120deg,#ffffff,#B7D5FF);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero h1 .cyan-text{color:var(--ice)}
.hero-sub{font-size:16px;line-height:2;color:var(--text-2);max-width:620px;margin-bottom:32px}
.hero-cta{display:flex;flex-wrap:wrap;gap:13px;margin-bottom:42px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  border-radius:13px;border:1px solid transparent;padding:0 22px;height:48px;
  font-size:15px;font-weight:700;cursor:pointer;transition:.25s;text-align:center;
}
.btn-primary{background:linear-gradient(135deg,var(--blue),#2B60D2);color:#fff;box-shadow:0 10px 28px rgba(61,127,255,.32);border-color:rgba(125,180,255,.22)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(61,127,255,.46)}
.btn-primary:active{transform:translateY(0)}
.btn-primary:hover i{transform:translateX(3px)}
.btn-primary i{transition:transform .2s}
.btn-ghost{border:1px solid rgba(161,195,255,.42);color:#E7F0FF;background:rgba(8,17,36,.44)}
.btn-ghost:hover{border-color:rgba(111,227,255,.7);background:rgba(111,227,255,.08);color:#fff}
.btn-gold{background:linear-gradient(135deg,#F6C76D,#D29C42);color:#1B1307;box-shadow:0 10px 26px rgba(246,199,109,.2)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(246,199,109,.34)}
.btn-sm{height:38px;padding:0 16px;border-radius:10px;font-size:13px}
.hero-stats{display:grid;grid-template-columns:repeat(3,minmax(130px,200px));justify-content:start;gap:20px}
.hero-stat__num{font-family:var(--font-num);font-size:27px;font-weight:800;color:var(--cyan);line-height:1.1}
.hero-stat__num small{font-size:14px;font-weight:600;margin-left:3px}
.hero-stat__label{margin-top:5px;color:var(--text-3);font-size:13px}
.hero-panel{
  margin-left:auto;width:min(330px,100%);border-radius:var(--r-lg);
  background:rgba(7,16,34,.44);border:1px solid rgba(140,176,255,.18);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  box-shadow:var(--shadow);padding:20px;
}
.hero-panel__top{display:flex;align-items:center;justify-content:space-between;margin-bottom:15px}
.hero-panel__title{font-size:15px;color:#F2F7FF;font-weight:700}
.hero-panel__tag{font-size:11px;color:var(--gold);border:1px solid rgba(246,199,109,.32);padding:2px 8px;border-radius:999px}
.arena-list{list-style:none}
.arena-item{display:flex;gap:12px;padding:11px 0;border-bottom:1px dashed rgba(255,255,255,.08)}
.arena-item+.arena-item{border-top:0}
.arena-item__time{color:var(--text-3);font-size:12px;font-family:var(--font-num)}
.arena-item__body{min-width:0}
.arena-item__name{font-size:13px;color:#DCE8FA;line-height:1.6}
.arena-item__tag{color:var(--ice);font-size:12px}
.hero-panel__foot{margin-top:13px;display:flex;align-items:center;gap:8px;font-size:12px;color:var(--text-3)}
.hero-panel__foot i{color:var(--cyan)}
/* comparison table */
.compare-wrap{border-radius:var(--r-lg);border:1px solid var(--line-soft);background:rgba(8,17,36,.42);padding:30px;box-shadow:var(--shadow)}
.table-scroll{overflow-x:auto;margin-top:26px}
.compare-table{width:100%;min-width:820px;border-collapse:separate;border-spacing:0;font-size:14px}
.compare-table .col-feature{width:168px;background:rgba(255,255,255,.015)}
.compare-table th,.compare-table td{padding:16px 18px;text-align:left;vertical-align:top;color:var(--text-2);border-bottom:1px solid rgba(255,255,255,.045)}
.compare-table thead th{border-bottom:1px solid rgba(255,255,255,.10);background:rgba(255,255,255,.035);color:#DCEAFF;font-weight:700;padding-top:18px;padding-bottom:13px}
.compare-table thead th:not(.col-feature){text-align:center}
.compare-table thead .plan-highlight{border-bottom-color:rgba(246,199,109,.6)}
.compare-table tbody tr:last-child th,.compare-table tbody tr:last-child td{border-bottom:0}
.compare-table tbody th{font-size:14px;color:#9FB4D6;font-weight:600}
.compare-table td{color:#B9C8E0}
.compare-table .plan-cell{text-align:center}
.compare-table .plan-cell.is-recommend{background:rgba(246,199,109,.07)}
.plan-name{font-size:17px;color:#fff;display:flex;flex-direction:column;gap:5px;align-items:center;font-weight:800}
.plan-price{font-size:15px;font-family:var(--font-num);color:var(--ice)}
.plan-price small{font-size:11px;color:#7990bd;font-family:var(--font-cn)}
.plan-name .plan-flag{margin-top:2px}
.reco-badge{
  display:inline-flex;align-items:center;gap:4px;background:linear-gradient(135deg,rgba(246,199,109,.16),rgba(246,199,109,.05));
  color:var(--gold);font-size:12px;font-weight:700;border:1px solid rgba(246,199,109,.35);border-radius:999px;padding:2px 10px;
}
.plan-user{display:inline-flex;align-items:flex-start;text-align:left;font-size:13px}
.compare-actions{display:flex;justify-content:center}
.btn-outline-table{display:inline-flex;height:34px;align-items:center;border-radius:10px;font-size:12px;font-weight:700;padding:0 13px;color:var(--ice);border:1px solid rgba(89,227,224,.36);}
.btn-outline-table:hover{background:rgba(89,227,224,.1);color:#fff;box-shadow:0 0 16px rgba(89,227,224,.16)}
.btn-fill-table{background:linear-gradient(135deg,var(--blue),#285DAF);color:#fff;box-shadow:0 6px 16px rgba(61,127,255,.26)}
.btn-fill-table:hover{transform:translateY(-1px);box-shadow:0 8px 20px rgba(61,127,255,.34)}
.btn-disabled-table{opacity:.44;pointer-events:none}
.compare-note{display:flex;justify-content:space-between;gap:14px;margin-top:20px;font-size:13px;color:#6d82a9;flex-wrap:wrap}
.compare-note .price-note{border:1px dashed rgba(111,227,255,.25);border-radius:9px;padding:4px 11px}
.recommend-border{outline:1px solid rgba(246,199,109,.28);outline-offset:-1px}

/* member stages */
.stage-card{
  position:relative;height:100%;border-radius:var(--r-lg);padding:26px 22px 24px;overflow:hidden;
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.10);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  transition:transform .24s,box-shadow .24s,border-color .24s;
}
@supports not (backdrop-filter: blur(1px)){
  .stage-card{background:rgba(12,20,41,.94)}
}
.stage-card:hover{transform:translateY(-5px);border-color:rgba(111,227,255,.35);box-shadow:var(--glow)}
.stage-card--core{background:linear-gradient(165deg,rgba(89,227,224,.08),rgba(61,127,255,.03));border-color:rgba(89,227,224,.24)}
.stage-card--core::before{content:"";position:absolute;top:0;left:16%;right:16%;height:1px;background:linear-gradient(90deg,transparent,rgba(111,227,255,.6),transparent)}
.stage-card__number{font-family:var(--font-num);font-size:44px;color:rgba(155,190,240,.12);font-weight:800;line-height:1;display:block;margin-bottom:8px}
.stage-card--core .stage-card__number{color:rgba(111,227,255,.32)}
.stage-card h3{font-size:18px;margin-bottom:9px}
.stage-card p{color:#A5B8D6;font-size:13px;margin:0}
.stage-card__meta{display:inline-flex;align-items:center;color:var(--cyan);font-size:12px;font-weight:600;margin-top:16px}
.stage-card__meta i{margin-left:7px;transition:transform .2s}
.stage-card:hover .stage-card__meta i{transform:translateX(3px)}
.stage-arrow{display:none}

/* preview cards */
.preview-card{
  border-radius:var(--r-md);background:rgba(9,18,37,.7);border:1px solid var(--line-soft);overflow:hidden;height:100%;transition:.24s;
  box-shadow:0 10px 32px rgba(0,0,0,.16);
}
.preview-card:hover{transform:translateY(-4px);border-color:rgba(89,227,224,.35);box-shadow:0 0 0 1px rgba(89,227,224,.16),0 12px 32px rgba(0,0,0,.28)}
.preview-card__media{position:relative;aspect-ratio:16/10;overflow:hidden;border-bottom:1px solid var(--line-soft)}
.preview-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .55s ease}
.preview-card:hover .preview-card__media img{transform:scale(1.04)}
.preview-card__media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(4,8,17,.2),rgba(4,8,17,.4))}
.preview-card__cat{position:absolute;left:13px;top:13px;z-index:2;background:rgba(5,11,22,.66);border:1px solid rgba(89,227,224,.4);color:#CFFBFF;font-size:12px;border-radius:999px;padding:3px 11px;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
.preview-card__lockbox{position:absolute;right:12px;bottom:12px;z-index:2;display:flex;align-items:center;gap:6px;color:#FFF5E0;font-size:11px;background:rgba(9,15,28,.7);border-radius:999px;padding:3px 10px;border:1px solid rgba(255,255,255,.16)}
.preview-card__body{padding:18px 18px 20px}
.preview-card h3{font-size:16px;line-height:1.5;color:#EAF2FF;margin-bottom:8px}
.preview-card p{font-size:13px;color:#92A6C9;margin:0;line-height:1.75}
.preview-card__foot{margin-top:14px}
.cta-mini{display:inline-flex;gap:7px;align-items:center;font-size:13px;color:var(--ice);font-weight:600}
.cta-mini:hover{color:#fff}
.cta-mini i{transition:transform .2s}
.cta-mini:hover i{transform:translateX(3px)}
.cta-mini.is-locked{color:#7e8fb0;cursor:default}
.cta-mini.is-locked:hover i{transform:none}

/* faq */
.faq-panel{max-width:820px;margin:0 auto}
.faq-card{border-radius:var(--r-md);background:rgba(255,255,255,.04);border:1px solid var(--line-soft);margin-top:12px;transition:.24s;overflow:hidden}
.faq-card:hover{border-color:rgba(111,227,255,.22)}
.faq-card summary{
  display:flex;align-items:center;justify-content:space-between;gap:18px;cursor:pointer;
  list-style:none;padding:17px 22px;font-size:15px;font-weight:600;color:#DCE7FA;border-radius:var(--r-md);
  transition:background .2s,color .2s;outline-offset:-4px;
}
.faq-card summary::-webkit-details-marker{display:none}
.faq-card summary:hover,.faq-card[open] summary{background:rgba(111,227,255,.05);color:#fff}
.faq-card[open] {border-color:rgba(111,227,255,.4);box-shadow:0 0 0 1px rgba(89,227,224,.06),0 10px 30px rgba(20,45,96,.2)}
.faq-card .faq-icon{flex:none;width:28px;height:28px;border-radius:9px;border:1px solid rgba(158,190,242,.30);display:grid;place-items:center;color:#AEC5EE;transition:.25s}
.faq-card[open] .faq-icon{color:var(--ice);border-color:rgba(111,227,255,.7);transform:rotate(45deg)}
.faq-card .faq-body{color:#AABDDD;font-size:14px;line-height:1.9;padding:2px 22px 20px;border-top:1px solid rgba(255,255,255,.04);margin-top:0}
.faq-card .faq-body p{margin-bottom:0}

/* membership cta */
.membership-cta{position:relative;overflow:hidden;border-radius:24px;padding:clamp(30px,5vw,58px);background:linear-gradient(130deg,rgba(26,57,119,.80),rgba(8,18,38,.94));border:1px solid rgba(89,227,224,.22);box-shadow:0 24px 70px rgba(0,0,0,.3)}
.membership-cta::before{content:"";position:absolute;inset:0;background:radial-gradient(640px 280px at 80% 0%,rgba(89,227,224,.12),transparent 60%),radial-gradient(500px 280px at 10% 100%,rgba(61,127,255,.14),transparent 60%)}
.membership-cta::after{content:"";position:absolute;width:2px;height:44px;left:50%;top:-10px;background:radial-gradient(circle,rgba(111,227,255,.7),transparent);animation:scan 4s infinite}
@keyframes scan{0%,100%{opacity:.15}50%{opacity:.9}}
.membership-cta__inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.membership-cta h2{font-size:clamp(23px,3vw,32px);color:#fff;margin-bottom:10px}
.membership-cta p{color:#B4C8E8;margin:0;max-width:610px;font-size:15px}
.membership-cta__action{flex:none;display:flex;flex-direction:column;align-items:flex-start;gap:9px}
.plan-chips{display:inline-flex;gap:6px;flex-wrap:wrap}
.plan-chips span{border:1px solid rgba(255,255,255,.20);color:#D7E1F2;border-radius:999px;padding:2px 11px;font-size:12px}

/* news board */
.news-card{display:flex;flex-direction:column;height:100%;border-radius:var(--r-md);border:1px solid var(--line-soft);background:rgba(9,17,34,.66);overflow:hidden;transition:.25s}
.news-card:hover{transform:translateY(-4px);border-color:rgba(111,227,255,.36);box-shadow:0 12px 34px rgba(0,0,0,.22)}
.news-card__media{position:relative;display:block;overflow:hidden;background:#0B1631;border-bottom:1px solid var(--line-soft)}
.news-card__media img{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover}
.news-card__cat{position:absolute;left:10px;top:10px;z-index:2;background:rgba(5,11,24,.68);color:var(--ice);border:1px solid rgba(111,227,255,.35);border-radius:999px;padding:2px 10px;font-size:11px}
.news-card__body{padding:17px 18px 20px;display:flex;flex-direction:column;flex:1}
.news-card__title{font-size:16px;line-height:1.5;color:#E8F0FE;margin-bottom:7px}
.news-card__title a{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card__title a:hover{color:var(--cyan)}
.news-card__excerpt{color:#8DA2C4;font-size:13px;line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:15px}
.news-card__meta{display:flex;align-items:center;justify-content:space-between;gap:9px;margin-top:auto;padding-top:13px;border-top:1px solid rgba(255,255,255,.055);font-size:12px;color:#687EA8}
.news-card__meta .read-link{color:#AFC3E8;font-size:12px;display:inline-flex;align-items:center;gap:5px}
.news-card__meta .read-link:hover{color:var(--ice)}
.news-card__meta time{font-family:var(--font-num)}
.empty-tip{
  min-height:240px;border-radius:var(--r-lg);border:1px dashed rgba(150,181,240,.22);background:rgba(255,255,255,.03);
  display:grid;place-items:center;color:#8CA1C4;text-align:center;padding:20px;font-size:15px;
}
/* footer */
.site-footer{background:#03070F;border-top:1px solid var(--line-soft);padding-top:56px;margin-top:0}
.site-footer__grid{display:flex;flex-wrap:wrap;gap:40px;padding-bottom:34px}
.site-footer__brand{flex:2 1 360px}
.site-footer__brand p{color:#657895;font-size:13px;line-height:1.9;max-width:360px;margin:16px 0 18px}
.site-footer__nav{flex:1 1 140px}
.site-footer__nav h4{font-size:15px;color:#DCE8FA;font-weight:700;margin-bottom:15px}
.site-footer__nav ul{list-style:none}
.site-footer__nav a{color:#778AAE;font-size:13px;display:block;padding:6px 0;line-height:1.7}
.site-footer__nav a:hover{color:var(--ice)}
.site-footer__contact p{display:flex;gap:10px;color:#778AAE;font-size:13px;margin-bottom:10px;align-items:center}
.site-footer__contact i{width:14px;color:var(--cyan);flex:none}
.footer-line{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;border-top:1px solid rgba(255,255,255,.05);padding:18px 0 22px;font-size:12px;color:#54688B}
.footer-line .legal{color:#54688B}

/* utilities */
.section-space{height:8px}
.reveal-badge{display:inline-flex;align-items:center;border:1px solid rgba(111,227,255,.24);color:#98F8FF;background:rgba(89,227,224,.05);border-radius:10px;padding:8px 14px;font-size:13px}
.reveal-badge i{margin-right:7px;color:var(--gold)}
/* responsive */
@media screen and (max-width:1024px){
  .nav-bar{display:none}
  .menu-trigger{display:inline-flex;align-items:center;justify-content:center}
  .header-top__inner{height:62px}
  .section{padding:68px 0}
  .hero{padding-top:60px;padding-bottom:60px;min-height:0}
  .hero-panel{display:none}
  .hero-stats{grid-template-columns:repeat(3,1fr);gap:12px}
  .footer-line{flex-direction:column}
}
@media screen and (max-width:900px){
  .header-user span{display:none}
  .header-user{padding:0 12px;width:36px;justify-content:center}
}
@media screen and (max-width:640px){
  .grid-container{padding:0 16px}
  .section{padding:52px 0}
  .section-head{margin-bottom:30px}
  .section-title{font-size:23px}
  .hero h1{font-size:29px}
  .hero-sub{font-size:14px;margin-bottom:24px}
  .hero-cta .btn{height:44px;padding:0 16px}
  .hero-stats{gap:10px}
  .hero-stat__num{font-size:22px}
  .hero-stat__label{font-size:11px}
  .compare-wrap{padding:16px}
  .compare-table{min-width:700px}
  .stage-card{padding:21px 16px}
  .membership-cta{padding:27px 20px}
  .news-card__title{font-size:15px}
  .brand__mark{width:34px;height:34px;border-radius:11px}
  .brand__name{font-size:16px}
  .brand__name span{display:none}
}

/* roulang page: article */
:root {
            --bg-color: #050B16;
            --bg-elevated: #081226;
            --panel-bg: rgba(255, 255, 255, 0.05);
            --panel-bg-strong: rgba(255, 255, 255, 0.08);
            --panel-border: rgba(255, 255, 255, 0.12);
            --primary: #3D7FFF;
            --primary-hover: #5A91FF;
            --accent: #59E3E0;
            --accent-blue: #6FE3FF;
            --energy: #F6C76D;
            --title-color: #F2F7FF;
            --text-color: #C7D2E8;
            --muted-color: #7E8FB0;
            --success: #4DD6A2;
            --warning: #F6C76D;
            --danger: #F0718B;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --radius-pill: 999px;
            --shadow-main: 0 22px 60px rgba(0, 0, 0, 0.35);
            --shadow-soft: 0 12px 34px rgba(0, 0, 0, 0.22);
            --shadow-glow: 0 0 0 1px rgba(61, 127, 255, 0.35), 0 12px 36px rgba(61, 127, 255, 0.16);
            --max-width: 1200px;
            --max-read: 860px;
            --header-h: 44px;
            --nav-h: 54px;
            --transition: all 0.25s ease;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "HarmonyOS Sans SC", sans-serif;
            --font-num: "DIN Alternate", Inter, Bahnschrift, "Arial Narrow", sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-color);
            background-image: radial-gradient(circle at 82% 6%, rgba(61, 127, 255, 0.1), transparent 30%),
                radial-gradient(circle at 12% 38%, rgba(89, 227, 224, 0.06), transparent 24%),
                linear-gradient(180deg, #081226 0%, var(--bg-color) 34%);
            color: var(--text-color);
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
            min-height: 100vh;
            overflow-x: hidden;
        }

        img {
            display: block;
            max-width: 100%;
            border-radius: var(--radius-md);
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover,
        a:focus-visible {
            color: var(--accent-blue);
        }

        ul,
        ol {
            list-style: none;
        }

        button,
        input {
            font-family: inherit;
            border: none;
            background: none;
            outline: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

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

        ::selection {
            background: rgba(61, 127, 255, 0.35);
            color: #fff;
        }

        :focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

        /* ---------- header ---------- */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 90;
            background: rgba(5, 11, 22, 0.9);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.22);
        }

        .header-top {
            background: rgba(7, 15, 30, 0.72);
            border-bottom: 1px solid rgba(255, 255, 255, 0.055);
        }

        .header-top__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: var(--header-h);
            gap: 16px;
            padding: 6px 0;
        }

        .brand {
            display: flex;
            align-items: center;
        }

        .brand__logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            letter-spacing: 0.01em;
        }

        .brand__mark {
            display: inline-flex;
            width: 38px;
            height: 38px;
            flex: 0 0 38px;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: linear-gradient(145deg, #2f6ff2 0%, #1c4ea8 55%, #6fe3ff 130%);
            color: #fff;
            font-size: 13px;
            font-weight: 800;
            letter-spacing: 0.05em;
            box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.1), 0 14px 24px rgba(49, 111, 242, 0.24);
        }

        .brand__name {
            color: var(--title-color);
            font-size: 19px;
            font-weight: 800;
            white-space: nowrap;
        }

        .header-top__actions {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .header-user {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border: 1px solid rgba(255, 255, 255, 0.16);
            border-radius: var(--radius-pill);
            background: rgba(255, 255, 255, 0.05);
            color: var(--title-color);
            font-size: 13px;
            transition: var(--transition);
        }

        .header-user i {
            color: var(--accent);
        }

        .header-user:hover {
            border-color: rgba(89, 227, 224, 0.5);
            background: rgba(89, 227, 224, 0.08);
            color: #fff;
        }

        .menu-trigger {
            display: none;
            width: 38px;
            height: 38px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            border: 1px solid var(--panel-border);
            background: rgba(255, 255, 255, 0.06);
            color: var(--title-color);
            font-size: 17px;
        }

        .site-header.shrink .nav-bar {
            background: rgba(5, 11, 22, 0.92);
            box-shadow: 0 10px 24px rgba(0, 0, 0, 0.22);
        }

        .nav-bar {
            background: rgba(5, 11, 22, 0.65);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: var(--nav-h);
            gap: 16px;
        }

        .primary-nav ul {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .primary-nav a {
            display: inline-flex;
            align-items: center;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            color: var(--text-color);
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            position: relative;
        }

        .primary-nav a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
        }

        .primary-nav a.active {
            color: #fff;
            background: rgba(61, 127, 255, 0.14);
            box-shadow: inset 0 -2px 0 var(--primary);
        }

        .primary-nav a.active::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 4px;
            height: 2px;
            border-radius: var(--radius-pill);
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0.85;
        }

        .nav-tools {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .nav-search {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-pill);
            height: 34px;
            padding: 0 4px 0 14px;
            transition: var(--transition);
            max-width: 240px;
        }

        .nav-search:focus-within {
            border-color: rgba(61, 127, 255, 0.7);
            box-shadow: 0 0 0 3px rgba(61, 127, 255, 0.15);
        }

        .nav-search input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--title-color);
            width: 100%;
            font-size: 13px;
        }

        .nav-search input::placeholder {
            color: var(--muted-color);
        }

        .nav-search button {
            width: 30px;
            height: 30px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--muted-color);
            border-radius: 50%;
        }

        .nav-search button:hover {
            color: var(--accent);
        }

        .hot-list {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }

        .hot-list__label i {
            color: var(--warning);
            font-size: 13px;
            margin-right: 2px;
        }

        .hot-list li a {
            padding: 3px 10px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.14);
            color: var(--muted-color);
            font-size: 12px;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .hot-list li a:hover {
            border-color: rgba(89, 227, 224, 0.5);
            color: var(--accent);
            background: rgba(89, 227, 224, 0.06);
        }

        .mobile-drawer {
            display: none;
        }

        /* ---------- main / article ---------- */
        .article-page {
            padding: 44px 0 70px;
        }

        .article-page__layout {
            max-width: var(--max-read);
            margin: 0 auto;
        }

        .article-breadcrumb {
            margin-bottom: 16px;
        }

        .article-breadcrumb ul {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            color: var(--muted-color);
            font-size: 13px;
        }

        .article-breadcrumb a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--muted-color);
        }

        .article-breadcrumb a:hover {
            color: var(--accent);
        }

        .article-breadcrumb .sep {
            opacity: 0.5;
            font-size: 11px;
        }

        .article-breadcrumb .crumb-current {
            color: var(--text-color);
            max-width: 460px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .article-cat {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }

        .article-cat a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(61, 127, 255, 0.14);
            color: var(--accent-blue);
            border-radius: var(--radius-pill);
            padding: 4px 14px;
            font-size: 13px;
            font-weight: 600;
            border: 1px solid rgba(61, 127, 255, 0.3);
        }

        .article-cat a:hover {
            background: rgba(61, 127, 255, 0.24);
            color: #fff;
        }

        .article-title {
            font-size: clamp(28px, 4.2vw, 42px);
            font-weight: 800;
            line-height: 1.28;
            color: var(--title-color);
            letter-spacing: 0.01em;
            margin-bottom: 16px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px 20px;
            padding: 15px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 13px;
            color: var(--muted-color);
            margin-bottom: 26px;
        }

        .article-meta .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }

        .article-meta .meta-item i {
            color: var(--accent);
            font-size: 12px;
        }

        .article-meta .souce {
            color: var(--text-color);
        }

        .article-cover {
            margin-bottom: 32px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            position: relative;
            border: 1px solid rgba(255, 255, 255, 0.1);
            box-shadow: var(--shadow-main);
            background: #0B1730;
        }

        .article-cover img {
            width: 100%;
            aspect-ratio: 16 / 8;
            object-fit: cover;
            border-radius: 0;
        }

        .article-cover__shadow {
            position: absolute;
            inset: 0;
            pointer-events: none;
            background: linear-gradient(180deg, rgba(5, 11, 22, 0) 50%, rgba(5, 11, 22, 0.7) 100%);
        }

        /* article body */
        .article-content {
            font-size: 16px;
            line-height: 2;
            color: var(--text-color);
        }

        .article-content p {
            margin-bottom: 24px;
        }

        .article-content h2 {
            font-size: 27px;
            font-weight: 800;
            color: var(--title-color);
            margin: 42px 0 16px;
            line-height: 1.35;
            padding-left: 16px;
            border-left: 4px solid var(--primary);
        }

        .article-content h3 {
            font-size: 21px;
            font-weight: 700;
            color: var(--title-color);
            margin-top: 28px;
            margin-bottom: 12px;
        }

        .article-content blockquote {
            background: rgba(89, 227, 224, 0.08);
            border-left: 3px solid var(--accent);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            padding: 20px 24px;
            margin: 26px 0;
            color: var(--title-color);
        }

        .article-content ul,
        .article-content ol {
            padding-left: 20px;
            margin-bottom: 24px;
        }

        .article-content ul li {
            list-style: disc;
            margin-bottom: 8px;
        }

        .article-content ol li {
            list-style: decimal;
            margin-bottom: 8px;
        }

        .article-content img {
            width: 100%;
            object-fit: cover;
            margin: 20px 0;
            border-radius: var(--radius-lg);
        }

        .article-content a {
            color: var(--accent);
            border-bottom: 1px solid rgba(89, 227, 224, 0.3);
        }

        .article-content a:hover {
            border-bottom-color: var(--accent);
            color: #fff;
        }

        /* article footer */
        .article-footerbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            margin: 14px 0 56px;
        }

        .article-tags {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .article-tags span {
            color: var(--muted-color);
            font-size: 13px;
        }

        .article-tags a {
            padding: 3px 12px;
            border-radius: var(--radius-pill);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: var(--muted-color);
            font-size: 12px;
        }

        .article-tags a:hover {
            border-color: rgba(89, 227, 224, 0.4);
            color: var(--accent);
        }

        .article-share {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .article-share span {
            color: var(--muted-color);
            font-size: 13px;
        }

        .share-btn {
            width: 34px;
            height: 34px;
            border-radius: 9px;
            border: 1px solid rgba(255, 255, 255, 0.14);
            background: rgba(255, 255, 255, 0.05);
            color: var(--muted-color);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            transition: var(--transition);
        }

        .share-btn:hover {
            background: rgba(61, 127, 255, 0.16);
            color: #fff;
        }

        /* not found */
        .article-notfound {
            border: 1px solid rgba(255, 255, 255, 0.14);
            padding: 70px 26px;
            border-radius: var(--radius-lg);
            background: rgba(255, 255, 255, 0.04);
            text-align: center;
        }

        .article-notfound i {
            color: var(--muted-color);
            font-size: 38px;
            margin-bottom: 16px;
        }

        .article-notfound h1 {
            color: var(--title-color);
            font-size: 32px;
            margin-bottom: 10px;
        }

        .article-notfound p {
            margin-bottom: 22px;
            color: var(--muted-color);
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            padding: 11px 24px;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08) inset, 0 8px 20px rgba(61, 127, 255, 0.24);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            color: #fff;
            box-shadow: 0 8px 26px rgba(61, 127, 255, 0.4);
            transform: translateY(-2px);
        }

        .btn-ghost {
            border-color: rgba(255, 255, 255, 0.18);
            color: var(--title-color);
            background: rgba(255, 255, 255, 0.04);
        }

        .btn-ghost:hover {
            border-color: rgba(89, 227, 224, 0.55);
            color: var(--accent);
            background: rgba(89, 227, 224, 0.06);
        }

        .btn-sm {
            padding: 7px 14px;
            font-size: 13px;
            border-radius: 10px;
        }

        /* related */
        .related-section {
            margin: 58px 0 56px;
        }

        .section-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--accent);
            font-size: 13px;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 10px;
        }

        .section-eyebrow::before {
            content: "";
            display: block;
            width: 18px;
            height: 2px;
            border-radius: 2px;
            background: var(--accent);
            opacity: 0.8;
        }

        .section-title {
            color: var(--title-color);
            font-size: 30px;
            font-weight: 800;
            line-height: 1.5;
            margin-bottom: 28px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 18px;
        }

        .post-card {
            display: block;
            background: var(--panel-bg);
            border: 1px solid var(--panel-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
        }

        .post-card:hover {
            transform: translateY(-5px);
            border-color: rgba(61, 127, 255, 0.4);
            background: var(--panel-bg-strong);
            box-shadow: var(--shadow-glow);
        }

        .post-card__media {
            position: relative;
            overflow: hidden;
            background: #0B1830;
        }

        .post-card__media img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            transition: transform 0.4s ease;
            border-radius: 0;
        }

        .post-card:hover .post-card__media img {
            transform: scale(1.04);
        }

        .post-card__tag {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 2;
            background: rgba(5, 11, 22, 0.78);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(111, 227, 255, 0.32);
            color: #dff7ff;
            font-size: 12px;
            border-radius: var(--radius-pill);
            padding: 3px 12px;
        }

        .post-card__body {
            padding: 18px 18px 20px;
        }

        .post-card__title {
            color: var(--title-color);
            font-size: 18px;
            font-weight: 700;
            line-height: 1.55;
            margin-bottom: 8px;
        }

        .post-card__body p {
            font-size: 14px;
            color: var(--muted-color);
            line-height: 1.8;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .post-card__meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--muted-color);
        }

        .post-card__meta .cat {
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-backlink {
            margin: 12px 0 56px;
            text-align: center;
        }

        /* Light CTA */
        .article-cta {
            background: linear-gradient(135deg, rgba(61, 127, 255, 0.13), rgba(10, 32, 72, 0.75), var(--bg-elevated));
            border: 1px solid rgba(61, 127, 255, 0.42);
            border-radius: var(--radius-lg);
            padding: 28px 34px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            flex-wrap: wrap;
            margin-bottom: 26px;
            box-shadow: var(--shadow-soft);
        }

        .article-cta__info h3 {
            font-size: 22px;
            color: var(--title-color);
            font-weight: 700;
            margin-bottom: 4px;
        }

        .article-cta__info p {
            color: var(--muted-color);
            font-size: 15px;
            max-width: 560px;
        }

        /* footer */
        .site-footer {
            background: #030913;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            margin-top: 20px;
        }

        .site-footer__grid {
            display: grid;
            grid-template-columns: 1.25fr 0.65fr 0.65fr 1fr;
            gap: 36px;
            padding: 52px 0 38px;
        }

        .site-footer .brand__mark {
            width: 36px;
            height: 36px;
            flex-basis: 36px;
            font-size: 12px;
        }

        .site-footer .brand__name {
            font-size: 18px;
        }

        .site-footer__brand p {
            color: var(--muted-color);
            font-size: 14px;
            max-width: 380px;
            margin: 16px 0;
        }

        .reveal-badge {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 4px 13px;
            background: rgba(89, 227, 224, 0.1);
            color: var(--accent);
            border-radius: var(--radius-pill);
            font-size: 12px;
            border: 1px solid rgba(89, 227, 224, 0.18);
        }

        .site-footer__nav h4 {
            color: var(--title-color);
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 15px;
        }

        .site-footer__nav ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .site-footer__nav a {
            color: var(--muted-color);
            font-size: 14px;
            display: inline-block;
            padding: 2px 0;
        }

        .site-footer__nav a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .site-footer__contact p {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--muted-color);
            font-size: 14px;
            margin-bottom: 9px;
        }

        .site-footer__contact i {
            color: var(--primary);
            width: 16px;
            text-align: center;
        }

        .footer-line {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            border-top: 1px solid rgba(255, 255, 255, 0.07);
            padding: 20px 0 26px;
            color: var(--muted-color);
            font-size: 12px;
        }

        .footer-line .legal {
            color: rgba(126, 143, 176, 0.6);
        }

        @supports not (backdrop-filter: blur(1px)) {
            .site-header,
            .nav-bar,
            .post-card__tag {
                background: #081226;
            }
        }

        /* responsive */
        @media screen and (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, minmax(0, 1fr));
            }

            .hot-list .hot-list__label {
                display: none;
            }

            .site-footer__grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media screen and (max-width: 768px) {
            .header-top__inner {
                min-height: 40px;
                padding: 6px 0;
            }

            .brand__name {
                font-size: 17px;
            }

            .brand__mark {
                width: 34px;
                height: 34px;
                flex-basis: 34px;
                font-size: 12px;
            }

            .header-user span {
                display: none;
            }

            .header-user {
                width: 38px;
                height: 36px;
                padding: 0;
                border-radius: 10px;
                justify-content: center;
            }

            .menu-trigger {
                display: inline-flex;
            }

            .nav-bar {
                display: none;
            }

            .site-header {
                background: rgba(5, 11, 22, 0.96);
            }

            .mobile-drawer {
                display: block;
                background: rgba(5, 11, 22, 0.96);
                border-bottom: 1px solid rgba(255, 255, 255, 0.07);
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.4s ease;
                backdrop-filter: blur(18px);
            }

            .mobile-drawer.open {
                max-height: 500px;
                border-bottom-color: rgba(61, 127, 255, 0.25);
            }

            .mobile-drawer__inner {
                padding: 14px 20px 22px;
            }

            .mobile-drawer .drawer-search {
                display: flex;
                align-items: center;
                background: rgba(255, 255, 255, 0.06);
                border: 1px solid rgba(255, 255, 255, 0.12);
                border-radius: var(--radius-pill);
                padding: 3px 4px 3px 16px;
                margin-bottom: 18px;
            }

            .mobile-drawer .drawer-search input {
                flex: 1;
                min-width: 0;
                background: transparent;
                border: none;
                color: var(--title-color);
                font-size: 14px;
                padding: 7px 0;
            }

            .mobile-drawer .drawer-search button {
                width: 34px;
                height: 30px;
                color: var(--accent);
                border-radius: 50%;
            }

            .mobile-drawer .drawer-nav li a {
                display: block;
                padding: 10px 14px;
                border-radius: var(--radius-sm);
                color: var(--text-color);
                font-size: 15px;
                font-weight: 600;
                border-left: 2px solid transparent;
                margin-bottom: 2px;
            }

            .mobile-drawer .drawer-nav li a.active,
            .mobile-drawer .drawer-nav li a:hover {
                color: #fff;
                background: rgba(61, 127, 255, 0.13);
                border-left-color: var(--primary);
            }

            .mobile-drawer .drawer-tags {
                display: flex;
                align-items: center;
                flex-wrap: wrap;
                gap: 8px;
                border-top: 1px solid rgba(255, 255, 255, 0.07);
                padding-top: 18px;
            }

            .mobile-drawer .drawer-tags .drawer-tag-title {
                color: var(--muted-color);
                font-size: 12px;
            }

            .mobile-drawer .drawer-tags a {
                padding: 4px 12px;
                border-radius: 999px;
                border: 1px solid rgba(255, 255, 255, 0.16);
                color: var(--muted-color);
                font-size: 13px;
            }

            .mobile-drawer .drawer-tags a:hover {
                color: var(--accent);
                border-color: rgba(89, 227, 224, 0.5);
            }

            .article-page {
                padding: 28px 0 44px;
            }

            .grid-container {
                padding: 0 18px;
            }

            .article-title {
                font-size: 28px;
            }

            .article-cover img {
                aspect-ratio: 16 / 9;
            }

            .section-title {
                font-size: 26px;
                margin-bottom: 20px;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

            .article-cta {
                padding: 22px 20px;
            }
        }

        @media screen and (max-width: 520px) {
            .header-top__inner {
                gap: 8px;
            }

            .brand__mark {
                width: 30px;
                height: 30px;
                flex-basis: 30px;
                border-radius: 9px;
            }

            .brand__name {
                font-size: 15px;
            }

            .header-user {
                width: 36px;
                height: 34px;
            }

            .menu-trigger {
                width: 36px;
                height: 36px;
            }

            .article-page {
                padding-top: 22px;
            }

            .article-meta {
                gap: 8px 14px;
                font-size: 12px;
            }

            .article-content {
                font-size: 15px;
                line-height: 2;
            }

            .article-content h2 {
                font-size: 23px;
                padding-left: 12px;
            }

            .article-footerbar {
                flex-direction: column;
                align-items: flex-start;
            }

            .article-cta {
                flex-direction: column;
                align-items: flex-start;
            }

            .site-footer__grid {
                grid-template-columns: 1fr;
                padding: 34px 0 24px;
            }

            .footer-line {
                flex-direction: column;
                align-items: flex-start;
                text-align: left;
            }

            .site-footer__contact {
                font-size: 13px;
            }
        }

/* roulang page: category1 */
:root{
  --primary:#3d7fff;
  --accent:#6fe3ff;
  --accent-alt:#59e3e0;
  --gold:#f6c76d;
  --bg-base:#050b16;
  --bg-deep:#030810;
  --bg-panel:#081226;
  --glass:rgba(255,255,255,.05);
  --glass-deep:rgba(255,255,255,.08);
  --border:rgba(255,255,255,.12);
  --text-title:#f2f7ff;
  --text-body:#c7d2e8;
  --text-sub:#7e8fb0;
  --radius-lg:20px;
  --radius-md:14px;
  --radius-sm:10px;
  --shadow-card:0 14px 32px rgba(0,0,0,.32);
  --glow-primary:0 0 20px rgba(61,127,255,.28);
  --glow-accent:0 0 18px rgba(111,227,255,.2);
  --transition:.25s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Helvetica Neue",Roboto,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text-body);
  background:
    radial-gradient(1100px 600px at 85% -5%,rgba(61,127,255,.14),transparent 55%),
    radial-gradient(900px 480px at 0% 18%,rgba(111,227,255,.05),transparent 50%),
    var(--bg-base);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background .2s ease,opacity .2s ease}
img{max-width:100%;display:block}
ul{list-style:none}
button{font-family:inherit;border:none;background:none;cursor:pointer}
input{font-family:inherit}
h1,h2,h3,h4{line-height:1.35;color:var(--text-title);font-weight:700}
.grid-container{max-width:1200px}
.section{padding:84px 0}
@media (max-width:639px){
  .section{padding:52px 0}
}

/* ==== header ==== */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  width:100%;
}
.header-top{
  padding:12px 0;
  background:rgba(5,11,22,.84);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(255,255,255,.07);
  transition:padding .3s ease,background .3s ease;
}
.site-header.is-scrolled .header-top{
  padding:7px 0;
  background:rgba(5,11,22,.93);
}
.header-top__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.brand{
  display:flex;
  align-items:center;
}
.brand__logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
}
.brand__mark{
  display:flex;
  align-items:center;
  justify-content:center;
  width:34px;
  height:34px;
  border-radius:11px;
  background:linear-gradient(135deg,#17305c,var(--primary));
  color:#fff;
  font-weight:800;
  font-size:15px;
  letter-spacing:.02em;
  border:1px solid rgba(255,255,255,.16);
  box-shadow:0 0 18px rgba(61,127,255,.3);
}
.brand__name{
  font-size:18px;
  font-weight:800;
  letter-spacing:.01em;
  color:var(--text-title);
}
.header-top__actions{
  display:flex;
  align-items:center;
  gap:10px;
}
.header-user{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:13px;
  color:var(--text-body);
  padding:6px 14px;
  border:1px solid rgba(255,255,255,.14);
  border-radius:999px;
  transition:border-color .2s,color .2s,background .2s;
}
.header-user:hover{
  color:var(--accent);
  border-color:rgba(111,227,255,.45);
  background:rgba(111,227,255,.05);
}
.menu-trigger{
  display:none;
  align-items:center;
  justify-content:center;
  width:40px;
  height:36px;
  border:1px solid rgba(255,255,255,.15);
  border-radius:10px;
  color:var(--text-title);
  font-size:16px;
  background:rgba(255,255,255,.04);
  transition:border-color .2s,background .2s;
}
.menu-trigger:hover{
  background:rgba(255,255,255,.08);
  border-color:rgba(111,227,255,.4);
}
.nav-bar{
  background:rgba(5,11,22,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(255,255,255,.06);
  transition:background .3s,box-shadow .3s;
  position:relative;
  z-index:99;
}
.site-header.is-scrolled .nav-bar{
  background:rgba(5,11,22,.95);
  box-shadow:0 10px 26px rgba(0,0,0,.3);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:52px;
}
.primary-nav ul{
  display:flex;
  align-items:center;
  gap:2px;
}
.primary-nav a{
  display:block;
  padding:10px 15px;
  font-size:14px;
  font-weight:500;
  color:var(--text-body);
  border-radius:10px;
}
.primary-nav a:hover{
  color:var(--text-title);
  background:rgba(255,255,255,.06);
}
.primary-nav a.active{
  color:#fff;
  background:rgba(61,127,255,.2);
  border:1px solid rgba(61,127,255,.22);
  box-shadow:inset 0 -2px 0 var(--accent);
  padding:9px 14px;
}
.nav-tools{
  display:flex;
  align-items:center;
  gap:14px;
}
.nav-search{
  display:flex;
  align-items:center;
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.1);
  border-radius:999px;
  padding:3px 5px 3px 13px;
}
.nav-search input{
  background:transparent;
  border:none;
  outline:none;
  width:150px;
  color:var(--text-title);
  font-size:13px;
  line-height:normal;
}
.nav-search input::placeholder{
  color:var(--text-sub);
}
.nav-search button{
  width:28px;
  height:28px;
  border-radius:50%;
  background:rgba(255,255,255,.08);
  color:var(--text-sub);
  display:flex;
  align-items:center;
  justify-content:center;
}
.nav-search button:hover{
  color:var(--accent);
}
.hot-list{
  display:flex;
  align-items:center;
  gap:6px;
  font-size:12px;
}
.hot-list__label{
  color:var(--accent);
  margin-right:2px;
}
.hot-list a{
  display:inline-block;
  padding:3px 10px;
  border:1px solid rgba(255,255,255,.16);
  border-radius:999px;
  color:var(--text-sub);
  font-size:12px;
  background:rgba(255,255,255,.02);
}
.hot-list a:hover{
  color:var(--accent);
  border-color:rgba(111,227,255,.4);
}

/* ==== page banner ==== */
.page-banner{
  position:relative;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center 30%;
  padding:70px 0 76px;
}
.page-banner::before{
  content:'';
  position:absolute;
  inset:0;
  background:linear-gradient(105deg,rgba(3,8,16,.94) 0%,rgba(5,11,22,.82) 48%,rgba(5,11,22,.52) 100%);
}
.page-banner__inner{
  position:relative;
  z-index:2;
}
.breadcrumb-wrap{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
  color:var(--text-sub);
  margin-bottom:20px;
}
.breadcrumb-wrap a{
  color:var(--text-sub);
}
.breadcrumb-wrap a:hover{
  color:var(--accent);
}
.breadcrumb-wrap .sep{
  color:rgba(255,255,255,.26);
  font-size:11px;
}
.page-kicker{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:rgba(255,255,255,.08);
  border:1px solid rgba(111,227,255,.24);
  padding:5px 14px;
  border-radius:999px;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--accent);
  margin-bottom:18px;
}
.page-kicker i{
  font-size:11px;
  color:var(--gold);
}
.page-banner h1{
  font-size:42px;
  line-height:1.28;
  max-width:720px;
  margin:0 0 16px;
  letter-spacing:.015em;
}
.page-banner__lead{
  font-size:17px;
  line-height:1.9;
  max-width:680px;
  color:var(--text-body);
  margin-bottom:4px;
}
.page-banner__meta{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:12px;
  margin-top:26px;
  color:var(--text-sub);
  font-size:13px;
}
.page-banner__meta span{
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.page-banner__meta i{
  color:var(--accent);
  font-size:12px;
}
@media (max-width:639px){
  .page-banner{padding:48px 0 52px}
  .page-banner h1{font-size:30px}
  .page-banner__lead{font-size:15px}
}

/* ==== section headers ==== */
.section-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.12em;
  color:var(--accent);
  text-transform:uppercase;
}
.section-tag::before{
  content:'';
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 10px var(--accent);
}
.section-title{
  font-size:30px;
  line-height:1.4;
  margin:12px 0 14px;
  color:var(--text-title);
  max-width:620px;
}
.section-sub{
  color:var(--text-sub);
  font-size:15px;
  max-width:660px;
}
.section-head{
  margin-bottom:36px;
}
@media (max-width:639px){
  .section-title{font-size:24px}
}

/* ==== 分类导语 intro ==== */
.category-intro{
  background:linear-gradient(180deg,transparent,rgba(8,18,38,.38));
}
.intro-copy{
  padding-right:16px;
}
.intro-copy p{
  margin-bottom:14px;
  font-size:16px;
  line-height:1.95;
  color:var(--text-body);
}
.intro-copy p strong{
  color:var(--text-title);
  font-weight:600;
}
.rhythm-panel{
  background:linear-gradient(145deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius-lg);
  padding:28px;
  position:relative;
  overflow:hidden;
}
.rhythm-panel::before{
  content:'';
  position:absolute;
  top:-60px;
  right:-60px;
  width:160px;
  height:160px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(61,127,255,.28),transparent 70%);
  pointer-events:none;
}
.rhythm-panel__title{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  font-weight:700;
  color:var(--text-title);
  letter-spacing:.08em;
  margin-bottom:20px;
}
.rhythm-panel__title i{
  color:var(--accent);
}
.rhythm-list{
  display:grid;
  gap:16px;
}
.rhythm-list li{
  display:flex;
  gap:14px;
  align-items:flex-start;
  padding:14px 16px;
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.08);
  border-radius:var(--radius-md);
  transition:border-color .2s,background .2s;
}
.rhythm-list li:hover{
  border-color:rgba(111,227,255,.3);
  background:rgba(255,255,255,.06);
}
.rhythm-time{
  flex:0 0 auto;
  min-width:66px;
  font-size:12px;
  font-weight:700;
  color:var(--accent);
  padding:4px 10px;
  background:rgba(61,127,255,.16);
  border-radius:999px;
  text-align:center;
  line-height:1.5;
}
.rhythm-list li p{
  font-size:14px;
  line-height:1.7;
  color:var(--text-body);
}
.rhythm-list li p strong{
  display:block;
  color:var(--text-title);
  font-weight:600;
  font-size:15px;
  margin-bottom:2px;
}

/* ==== feature 图文 ==== */
.feature-block{
  background:var(--bg-panel);
  border-top:1px solid rgba(255,255,255,.06);
  border-bottom:1px solid rgba(255,255,255,.06);
}
.feature-copy{
  padding-left:42px;
}
.feature-copy .section-tag{
  margin-bottom:10px;
}
.feature-copy p{
  font-size:16px;
  line-height:1.95;
  margin-bottom:20px;
}
.feature-list{
  display:grid;
  gap:12px;
  margin-top:4px;
}
.feature-list li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.08);
  border-radius:var(--radius-md);
  padding:14px 16px;
  transition:border-color .2s,transform .2s;
}
.feature-list li:hover{
  border-color:rgba(61,127,255,.35);
  transform:translateX(4px);
}
.feature-list__num{
  flex:0 0 30px;
  height:30px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  color:#fff;
  font-size:12px;
  font-weight:700;
  margin-top:2px;
}
.feature-list__text strong{
  display:block;
  color:var(--text-title);
  font-size:15px;
  font-weight:600;
  margin-bottom:2px;
}
.feature-list__text span{
  font-size:13px;
  color:var(--text-sub);
}
.feature-media{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-card);
}
.feature-media img{
  width:100%;
  height:100%;
  min-height:360px;
  object-fit:cover;
  transition:transform .5s ease;
}
.feature-media:hover img{
  transform:scale(1.02);
}
.feature-media::after{
  content:'';
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,transparent 55%,rgba(3,8,16,.55));
  pointer-events:none;
}
.feature-media__badge{
  position:absolute;
  left:16px;
  bottom:16px;
  z-index:3;
  font-size:12px;
  color:#fff;
  background:rgba(5,11,22,.65);
  backdrop-filter:blur(8px);
  border:1px solid rgba(255,255,255,.16);
  padding:5px 14px;
  border-radius:999px;
  letter-spacing:.06em;
}
@media (max-width:1024px){
  .feature-copy{padding-left:0;margin-top:28px}
}

/* ==== cards ==== */
.cards-grid .cell{
  margin-bottom:22px;
}
.info-card{
  height:100%;
  background:linear-gradient(150deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:30px 26px;
  transition:transform .3s ease,border-color .3s,background .3s,box-shadow .3s;
  display:flex;
  flex-direction:column;
}
.info-card:hover{
  transform:translateY(-6px);
  background:linear-gradient(150deg,rgba(255,255,255,.08),rgba(255,255,255,.03));
  border-color:rgba(111,227,255,.32);
  box-shadow:0 18px 38px rgba(0,0,0,.36),var(--glow-primary);
}
.info-card__icon{
  width:48px;
  height:48px;
  border-radius:14px;
  background:linear-gradient(140deg,rgba(61,127,255,.3),rgba(111,227,255,.12));
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:20px;
  color:var(--accent);
  margin-bottom:20px;
  border:1px solid rgba(111,227,255,.16);
}
.info-card__top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:14px;
}
.info-card__top h3{
  font-size:18px;
  line-height:1.4;
  margin:0;
}
.badge-free{
  flex:0 0 auto;
  font-size:11px;
  font-weight:600;
  color:#9ad9f5;
  background:rgba(111,227,255,.1);
  border:1px solid rgba(111,227,255,.2);
  padding:3px 10px;
  border-radius:999px;
}
.badge-vip{
  flex:0 0 auto;
  font-size:11px;
  font-weight:600;
  color:var(--gold);
  background:rgba(246,199,109,.08);
  border:1px solid rgba(246,199,109,.26);
  padding:3px 10px;
  border-radius:999px;
}
.info-card p{
  font-size:14px;
  line-height:1.9;
  color:var(--text-body);
  margin-bottom:16px;
  flex:1;
}
.info-card__foot{
  font-size:12px;
  color:var(--text-sub);
  display:flex;
  align-items:center;
  gap:6px;
  border-top:1px dashed rgba(255,255,255,.1);
  padding-top:14px;
}
.info-card__foot i{
  color:var(--accent);
}
@media (max-width:639px){
  .info-card{padding:24px 20px}
  .info-card__top{flex-direction:column;align-items:flex-start}
}

/* ==== data strip ==== */
.data-strip{
  border-top:1px solid rgba(255,255,255,.06);
  border-bottom:1px solid rgba(255,255,255,.06);
  background:linear-gradient(90deg,rgba(61,127,255,.08),rgba(255,255,255,.02),rgba(111,227,255,.06));
}
.data-item{
  text-align:center;
  padding:18px 8px;
  border-right:1px solid rgba(255,255,255,.08);
}
.data-item:last-child{border-right:none}
.data-item__time{
  color:var(--accent);
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  margin-bottom:6px;
}
.data-item__desc{
  color:var(--text-body);
  font-size:14px;
  line-height:1.6;
}
@media (max-width:639px){
  .data-item{border-right:none;text-align:left;padding:14px 4px}
}

/* ==== FAQ ==== */
.faq-wrap{
  max-width:860px;
  margin:0 auto;
}
.faq-head{
  text-align:center;
  margin-bottom:38px;
}
.faq-head .section-tag{
  justify-content:center;
}
.faq-head .section-title{
  margin-left:auto;
  margin-right:auto;
}
.faq-list{
  display:grid;
  gap:12px;
}
.faq-item{
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.1);
  border-radius:16px;
  overflow:hidden;
  transition:border-color .25s,box-shadow .25s;
}
.faq-item:hover{
  border-color:rgba(255,255,255,.16);
}
.faq-item.is-active{
  border-color:rgba(61,127,255,.4);
  background:rgba(61,127,255,.06);
  box-shadow:0 0 0 1px rgba(61,127,255,.08),var(--glow-primary);
}
.faq-toggle{
  width:100%;
  text-align:left;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:19px 22px;
  color:var(--text-title);
  font-size:16px;
  font-weight:600;
  line-height:1.5;
  background:transparent;
  cursor:pointer;
  transition:color .2s;
}
.faq-toggle:hover{
  color:var(--accent);
}
.faq-toggle:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:-2px;
}
.faq-icon{
  flex:0 0 28px;
  width:28px;
  height:28px;
  border-radius:50%;
  border:1px solid rgba(255,255,255,.2);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:12px;
  color:var(--text-sub);
  background:rgba(255,255,255,.04);
  transition:background .25s,color .25s,transform .25s,box-shadow .25s;
}
.faq-item.is-active .faq-icon{
  transform:rotate(180deg);
  background:rgba(61,127,255,.24);
  border-color:rgba(111,227,255,.4);
  color:var(--accent);
  box-shadow:0 0 10px rgba(61,127,255,.3);
}
.faq-answer{
  max-height:0;
  overflow:hidden;
  opacity:0;
  transition:max-height .3s ease,opacity .3s ease,padding .3s ease;
}
.faq-item.is-active .faq-answer{
  max-height:260px;
  opacity:1;
}
.faq-answer__inner{
  padding:0 22px 22px;
  color:var(--text-body);
  font-size:15px;
  line-height:1.9;
  border-top:1px solid rgba(255,255,255,.07);
  margin-top:0;
  padding-top:16px;
}
@media (max-width:639px){
  .faq-toggle{font-size:15px;padding:16px}
  .faq-answer__inner{padding:0 16px 18px;font-size:14px}
}

/* ==== CTA ==== */
.cta-section{
  background-image:url('/assets/images/backpic/back-3.png');
  background-size:cover;
  background-position:center;
  position:relative;
  padding:70px 0;
}
.cta-section::before{
  content:'';
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(3,8,16,.93),rgba(5,11,22,.84),rgba(61,127,255,.2));
}
.cta-inner{
  position:relative;
  z-index:2;
  text-align:center;
  max-width:740px;
  margin:0 auto;
}
.cta-inner h2{
  font-size:32px;
  line-height:1.35;
  margin-bottom:16px;
  color:#fff;
}
.cta-inner p{
  font-size:16px;
  line-height:1.9;
  color:var(--text-body);
  margin-bottom:28px;
}
.btn-group{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:14px;
  flex-wrap:wrap;
}
.btn-primary{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:linear-gradient(135deg,var(--primary),#2b5fd9);
  color:#fff;
  font-size:14px;
  font-weight:600;
  padding:13px 30px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.16);
  box-shadow:0 4px 22px rgba(61,127,255,.4);
  transition:transform .25s,box-shadow .25s,background .25s;
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 8px 28px rgba(61,127,255,.55);
  color:#fff;
}
.btn-primary:active{
  transform:translateY(0);
}
.btn-secondary{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:rgba(255,255,255,.06);
  color:var(--text-title);
  font-size:14px;
  font-weight:600;
  padding:13px 30px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.2);
  transition:border-color .25s,background .25s,color .25s;
}
.btn-secondary:hover{
  border-color:rgba(111,227,255,.5);
  background:rgba(111,227,255,.1);
  color:var(--accent);
}

/* ==== footer ==== */
.site-footer{
  background:var(--bg-deep);
  border-top:1px solid rgba(255,255,255,.05);
  padding-top:56px;
  margin-top:0;
}
.site-footer__grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:36px;
  padding-bottom:38px;
  border-bottom:1px solid rgba(255,255,255,.06);
}
.site-footer .brand__mark{
  width:32px;
  height:32px;
  font-size:13px;
}
.site-footer .brand__name{
  font-size:17px;
}
.site-footer__brand p{
  margin-top:16px;
  font-size:14px;
  line-height:1.9;
  color:var(--text-sub);
  max-width:340px;
}
.reveal-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:16px;
  font-size:12px;
  color:var(--accent);
  background:rgba(111,227,255,.06);
  border:1px solid rgba(111,227,255,.14);
  padding:5px 13px;
  border-radius:999px;
}
.site-footer__nav h4,
.site-footer__contact h4{
  font-size:15px;
  font-weight:700;
  color:var(--text-title);
  margin-bottom:16px;
  letter-spacing:.05em;
}
.site-footer__nav ul{
  display:grid;
  gap:8px;
}
.site-footer__nav a{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--text-sub);
  font-size:14px;
  line-height:1.8;
}
.site-footer__nav a:hover{
  color:var(--accent);
}
.site-footer__contact p{
  margin-bottom:9px;
  color:var(--text-sub);
  font-size:14px;
  display:flex;
  align-items:center;
  gap:8px;
}
.site-footer__contact i{
  color:var(--accent);
  width:18px;
  text-align:center;
  font-size:13px;
}
.footer-line{
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:8px;
  padding:18px 0 22px;
  font-size:13px;
  color:var(--text-sub);
}
.footer-line .legal{
  color:rgba(126,143,176,.7);
  font-size:12px;
}
@media (max-width:1024px){
  .site-footer__grid{
    grid-template-columns:1fr 1fr;
    gap:28px;
  }
}
@media (max-width:639px){
  .site-footer__grid{
    grid-template-columns:1fr;
  }
  .footer-line{
    flex-direction:column;
    align-items:flex-start;
  }
}

/* ==== mobile responsive nav ==== */
@media (max-width:1024px){
  .menu-trigger{
    display:inline-flex;
  }
  .nav-bar{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:block;
    max-height:0;
    overflow:hidden;
    opacity:0;
    pointer-events:none;
    background:rgba(5,11,22,.98);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    border-bottom:1px solid rgba(255,255,255,.08);
    box-shadow:0 24px 40px rgba(0,0,0,.45);
    transition:max-height .32s ease,opacity .25s ease;
  }
  .nav-bar.is-open{
    max-height:calc(100vh - 80px);
    opacity:1;
    pointer-events:auto;
    overflow-y:auto;
  }
  .nav-inner{
    display:block;
    padding:18px 0 10px;
  }
  .primary-nav ul{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .primary-nav a,
  .primary-nav a.active{
    display:block;
    padding:13px 4px;
    font-size:15px;
    border-radius:0;
    border-bottom:1px solid rgba(255,255,255,.06);
    background:transparent;
    box-shadow:none;
    color:var(--text-body);
  }
  .primary-nav a.active{
    color:var(--accent);
    background:rgba(61,127,255,.06);
    padding-left:10px;
    border-left:3px solid var(--accent);
    border-bottom:1px solid rgba(255,255,255,.06);
  }
  .primary-nav a:hover{
    background:rgba(255,255,255,.04);
    color:var(--text-title);
  }
  .nav-tools{
    margin-top:16px;
    display:flex;
    flex-direction:column;
    gap:12px;
  }
  .nav-search{
    width:100%;
  }
  .nav-search input{
    width:100%;
    flex:1;
  }
  .hot-list{
    flex-wrap:wrap;
  }
}

/* roulang page: category2 */
:root {
      --bg: #050b16;
      --bg-deep: #040711;
      --bg-elev: #0a1224;
      --panel: rgba(255, 255, 255, 0.05);
      --panel-strong: rgba(255, 255, 255, 0.08);
      --line: rgba(255, 255, 255, 0.12);
      --line-bright: rgba(109, 215, 255, 0.35);
      --primary: #3d7fff;
      --primary-deep: #1e5ee0;
      --accent: #59e3e0;
      --cyan: #6fe3ff;
      --gold: #f6c76d;
      --head: #f2f7ff;
      --text: #c7d2e8;
      --muted: #7e8fb0;
      --disabled: #4a5973;
      --success: #49cd8a;
      --warn: #f5b155;
      --danger: #ef6a7a;
      --radius-lg: 20px;
      --radius-md: 16px;
      --radius-sm: 12px;
      --radius-pill: 999px;
      --shadow-card: 0 20px 44px rgba(0, 0, 0, 0.28);
      --shadow-float: 0 22px 44px rgba(0, 0, 0, 0.4);
      --glow: 0 0 0 1px rgba(71, 156, 255, 0.2), 0 0 28px rgba(61, 127, 255, 0.36);
      --section-y: 88px;
      --container: 1200px;
      --max-read: 840px;
      --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Hiragino Sans GB", sans-serif;
      --font-display: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Inter", "DIN Alternate", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: var(--font-body);
      font-size: 16px;
      line-height: 1.8;
      background: var(--bg);
      color: var(--text);
      overflow-x: hidden;
      background-image:
        radial-gradient(circle at 82% 3%, rgba(61, 127, 255, 0.13), transparent 48%),
        radial-gradient(circle at 8% 30%, rgba(89, 227, 224, 0.055), transparent 30%),
        linear-gradient(180deg, #050b16 0%, #081226 100%);
      background-attachment: fixed;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      z-index: -1;
      pointer-events: none;
      background-image:
        radial-gradient(1px 1px at 8% 22%, rgba(255, 255, 255, 0.42), transparent 100%),
        radial-gradient(1.5px 1.5px at 22% 68%, rgba(176, 220, 255, 0.3), transparent 100%),
        radial-gradient(1px 1px at 47% 16%, rgba(255, 255, 255, 0.28), transparent 100%),
        radial-gradient(1px 1px at 63% 40%, rgba(176, 220, 255, 0.24), transparent 100%),
        radial-gradient(2px 2px at 76% 12%, rgba(247, 239, 199, 0.2), transparent 100%),
        radial-gradient(1px 1px at 92% 66%, rgba(111, 227, 255, 0.24), transparent 100%);
    }

    ::selection {
      background: rgba(61, 127, 255, 0.7);
      color: #fff;
    }

    body, h1, h2, h3, h4, h5, p, ul, ol, figure {
      margin: 0;
      padding: 0;
    }

    ul, ol {
      list-style: none;
    }

    a {
      color: var(--head);
      text-decoration: none;
      transition: color 0.2s ease;
    }

    a:hover {
      color: var(--cyan);
    }

    img {
      display: block;
      max-width: 100%;
    }

    button, input {
      font: inherit;
      border: 0;
    }

    button {
      cursor: pointer;
    }

    .grid-container {
      max-width: var(--container);
    }

    .site-header {
      position: relative;
      z-index: 80;
      background: rgba(5, 11, 22, 0.96);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
    }

    .header-top {
      position: relative;
      background: rgba(5, 11, 22, 0.1);
    }

    .header-top__inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      min-width: 0;
    }

    .brand__logo {
      display: inline-flex;
      align-items: center;
      gap: 12px;
    }

    .brand__mark {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 42px;
      height: 42px;
      flex: 0 0 42px;
      border-radius: 13px;
      background: linear-gradient(145deg, rgba(61, 127, 255, 0.72), rgba(34, 77, 180, 0.6));
      border: 1px solid rgba(112, 194, 255, 0.47);
      color: #fff;
      font-weight: 800;
      font-size: 17px;
      letter-spacing: -0.4px;
      font-family: "DIN Alternate", "Bahnschrift", sans-serif;
      box-shadow: 0 0 24px rgba(61, 127, 255, 0.16);
    }

    .brand__mark::after {
      content: "";
      display: block;
      width: 6px;
      height: 6px;
      margin-left: -2px;
      border-radius: 4px;
      background: var(--accent);
      box-shadow: 0 0 8px var(--accent);
      transform: translate(-11px, 12px);
    }

    .brand__name {
      font-family: var(--font-display);
      font-size: 20px;
      font-weight: 700;
      color: var(--head);
      letter-spacing: 0.3px;
      white-space: nowrap;
    }

    .header-top__actions {
      display: flex;
      align-items: center;
      gap: 18px;
    }

    .header-user {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: var(--text);
      padding: 8px 14px;
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-pill);
      background: rgba(255, 255, 255, 0.04);
      transition: all 0.2s ease;
    }

    .header-user i {
      color: var(--cyan);
    }

    .header-user:hover {
      background: rgba(61, 127, 255, 0.18);
      border-color: rgba(111, 227, 255, 0.42);
      color: var(--head);
    }

    .menu-trigger {
      display: none;
      width: 42px;
      height: 42px;
      align-items: center;
      justify-content: center;
      font-size: 19px;
      color: var(--head);
      background: rgba(255, 255, 255, 0.06);
      border-radius: 12px;
      border: 1px solid rgba(255, 255, 255, 0.14);
      transition: all 0.2s ease;
    }

    .menu-trigger:hover {
      background: rgba(111, 227, 255, 0.12);
      border-color: var(--cyan);
    }

    .nav-bar {
      position: sticky;
      top: 0;
      z-index: 50;
      min-height: 54px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      backdrop-filter: blur(18px) saturate(1.25);
      -webkit-backdrop-filter: blur(18px) saturate(1.25);
      background: rgba(6, 12, 23, 0.82);
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 28px;
      min-height: 54px;
    }

    .primary-nav ul {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .primary-nav a {
      position: relative;
      display: inline-flex;
      align-items: center;
      padding: 12px 16px;
      font-size: 15px;
      font-weight: 500;
      color: #b8c6e2;
      transition: all 0.2s ease;
    }

    .primary-nav a::after {
      content: "";
      position: absolute;
      left: 16px;
      right: 14px;
      bottom: 7px;
      height: 2px;
      border-radius: 2px;
      background: linear-gradient(90deg, var(--primary), var(--cyan));
      transform: scaleX(0.35);
      opacity: 0;
      transform-origin: center;
      transition: all 0.25s ease;
    }

    .primary-nav a:hover {
      color: var(--head);
    }

    .primary-nav a:hover::after {
      opacity: 0.8;
      transform: scaleX(0.8);
    }

    .primary-nav a.active {
      color: #fff;
    }

    .primary-nav a.active::after {
      opacity: 1;
      transform: scaleX(1);
    }

    .nav-tools {
      display: flex;
      align-items: center;
      gap: 18px;
    }

    .nav-search {
      display: flex;
      align-items: center;
      width: clamp(210px, 24vw, 300px);
      height: 36px;
      padding-left: 14px;
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-pill);
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .nav-search:focus-within {
      border-color: rgba(111, 227, 255, 0.5);
      box-shadow: 0 0 0 3px rgba(61, 127, 255, 0.12);
    }

    .nav-search input {
      flex: 1;
      min-width: 0;
      background: transparent;
      border: 0;
      color: var(--head);
      font-size: 13px;
      line-height: 1;
    }

    .nav-search input::placeholder {
      color: var(--muted);
    }

    .nav-search input:focus {
      outline: none;
    }

    .nav-search button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 34px;
      border-radius: 0 var(--radius-pill) var(--radius-pill) 0;
      background: transparent;
      color: var(--muted);
      font-size: 14px;
      transition: all 0.2s ease;
    }

    .nav-search button:hover {
      color: var(--cyan);
    }

    .hot-list {
      display: flex;
      align-items: center;
      gap: 10px;
      white-space: nowrap;
    }

    .hot-list__label {
      color: var(--gold);
      font-size: 13px;
    }

    .hot-list a {
      padding: 4px 12px;
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-pill);
      font-size: 12px;
      color: var(--text);
      transition: all 0.2s ease;
    }

    .hot-list a:hover {
      color: var(--cyan);
      border-color: rgba(111, 227, 255, 0.48);
    }

    .category-hero {
      position: relative;
      overflow: hidden;
      background:
        linear-gradient(90deg, rgba(4, 9, 18, 0.94), rgba(5, 12, 24, 0.72)),
        url('/assets/images/backpic/back-3.png') center / cover no-repeat;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding: 64px 0 42px;
    }

    .category-hero::after {
      content: "";
      position: absolute;
      right: -80px;
      top: -80px;
      width: 350px;
      height: 350px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(61, 127, 255, 0.18), rgba(28, 52, 120, 0) 72%);
      pointer-events: none;
    }

    .breadcrumb {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 8px;
      margin-bottom: 24px;
      font-size: 12px;
      color: var(--muted);
    }

    .breadcrumb i {
      font-size: 11px;
      color: rgba(255, 255, 255, 0.35);
    }

    .breadcrumb a {
      color: var(--muted);
      transition: color 0.2s ease;
    }

    .breadcrumb a:hover {
      color: var(--cyan);
    }

    .breadcrumb span {
      color: #b9c9e6;
    }

    .category-hero h1 {
      max-width: 900px;
      margin-bottom: 18px;
      font-family: var(--font-display);
      font-size: clamp(32px, 4.4vw, 48px);
      line-height: 1.25;
      font-weight: 750;
      color: var(--head);
      letter-spacing: -0.6px;
    }

    .category-hero .lead-tools {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px 18px;
      font-size: 14px;
      color: #aabada;
    }

    .category-hero .lead-tools span {
      display: inline-flex;
      align-items: center;
      gap: 7px;
    }

    .category-hero .lead-tools i {
      color: var(--accent);
      font-size: 12px;
    }

    .hero-kicker {
      display: inline-flex;
      align-items: center;
      margin-bottom: 14px;
      gap: 8px;
      font-size: 13px;
      font-weight: 500;
      letter-spacing: 1px;
      color: var(--cyan);
      text-transform: uppercase;
    }

    .hero-kicker i {
      color: var(--gold);
    }

    .summary-section {
      padding: var(--section-y) 0 40px;
    }

    .summary-card {
      border-radius: var(--radius-lg);
      background: rgba(255, 255, 255, 0.035);
      border: 1px solid rgba(255, 255, 255, 0.08);
      padding: 32px 0;
    }

    .summary-block {
      display: grid;
      grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
      align-items: center;
      gap: 50px;
    }

    .section-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      font-weight: 500;
      letter-spacing: 1.3px;
      color: var(--accent);
      margin-bottom: 14px;
    }

    .section-kicker::before {
      content: "";
      width: 20px;
      height: 2px;
      border-radius: 2px;
      background: var(--cyan);
    }

    .section-title {
      font-family: var(--font-display);
      font-size: clamp(26px, 3.4vw, 34px);
      line-height: 1.4;
      color: var(--head);
      font-weight: 700;
    }

    .summary-copy {
      max-width: 560px;
    }

    .summary-copy .section-title {
      margin-bottom: 22px;
    }

    .summary-copy p {
      margin-bottom: 20px;
      color: #bfcbdf;
    }

    .summary-copy p:last-child {
      margin-bottom: 0;
    }

    .summary-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px 20px;
      margin: 24px 0 8px;
    }

    .summary-list li {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: #d4ddf0;
    }

    .summary-list i {
      width: 22px;
      height: 22px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 50%;
      background: rgba(61, 127, 255, 0.15);
      color: var(--accent);
      font-size: 11px;
    }

    .summary-media {
      position: relative;
    }

    .summary-media .figure-wrap {
      border-radius: 22px;
      overflow: hidden;
      box-shadow: var(--shadow-card);
      border: 1px solid rgba(255, 255, 255, 0.12);
      position: relative;
    }

    .summary-media img.cover-image {
      width: 100%;
      aspect-ratio: 4 / 3;
      object-fit: cover;
      transform: scale(1.01);
      transition: transform 0.5s ease;
    }

    .summary-media .figure-wrap::after {
      content: "";
      position: absolute;
      inset: 0;
      border-radius: inherit;
      box-shadow: inset 0 -90px 80px -20px rgba(2, 5, 12, 0.74);
      pointer-events: none;
    }

    .media-badge {
      position: absolute;
      left: 18px;
      bottom: 18px;
      z-index: 2;
      padding: 9px 14px;
      border-radius: 12px;
      background: rgba(8, 16, 30, 0.84);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(255, 255, 255, 0.18);
      color: var(--head);
      font-size: 13px;
      line-height: 1.4;
    }

    .media-badge strong {
      color: var(--gold);
    }

    .matrix-section {
      padding: 46px 0 54px;
    }

    .matrix-head {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 24px;
      margin-bottom: 34px;
    }

    .matrix-head .section-title {
      max-width: 560px;
    }

    .matrix-desc {
      max-width: 420px;
      font-size: 14px;
      color: var(--muted);
      line-height: 1.9;
    }

    .matrix-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
      position: relative;
    }

    .method-card {
      display: flex;
      gap: 20px;
      align-items: flex-start;
      padding: 28px 26px;
      border-radius: var(--radius-lg);
      background: linear-gradient(140deg, rgba(255, 255, 255, 0.075), rgba(255, 255, 255, 0.02));
      border: 1px solid rgba(255, 255, 255, 0.11);
      box-shadow: 0 14px 40px rgba(0, 0, 0, 0.2);
      transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      position: relative;
      overflow: hidden;
    }

    @supports not (backdrop-filter: blur(1px)) {
      .method-card {
        background: rgba(10, 18, 36, 0.97);
      }
    }

    .method-card::before {
      content: "";
      position: absolute;
      top: 0;
      right: 0;
      width: 160px;
      height: 160px;
      background: radial-gradient(circle, rgba(89, 227, 224, 0.08), transparent 70%);
      pointer-events: none;
    }

    .method-card:hover {
      transform: translateY(-5px);
      border-color: rgba(111, 227, 255, 0.4);
      box-shadow: 0 24px 54px rgba(0, 0, 0, 0.36), 0 0 0 1px rgba(61, 127, 255, 0.12);
    }

    .method-icon {
      width: 52px;
      height: 52px;
      flex: 0 0 52px;
      border-radius: 15px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 19px;
      color: var(--accent);
      background: rgba(61, 127, 255, 0.15);
      border: 1px solid rgba(111, 227, 255, 0.25);
      box-shadow: 0 0 24px rgba(89, 227, 224, 0.08);
    }

    .method-copy h3 {
      font-size: 19px;
      font-weight: 650;
      color: var(--head);
      margin-bottom: 8px;
      letter-spacing: 0.1px;
    }

    .method-copy p {
      font-size: 14px;
      color: #a9b7d1;
      line-height: 1.85;
      margin-bottom: 0;
    }

    .guide-cta {
      position: relative;
      overflow: hidden;
      border-radius: var(--radius-lg);
      margin: 54px 0 52px;
      padding: 54px 48px;
      background:
        linear-gradient(112deg, rgba(3, 8, 17, 0.94), rgba(5, 14, 29, 0.75)),
        url('/assets/images/backpic/back-2.png') center / cover no-repeat;
      border: 1px solid rgba(255, 255, 255, 0.14);
      color: var(--head);
      box-shadow: 0 24px 50px rgba(0, 0, 0, 0.42);
    }

    .guide-cta::after {
      content: "";
      position: absolute;
      width: 300px;
      height: 300px;
      right: -100px;
      top: -120px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(111, 227, 255, 0.13), transparent 70%);
    }

    .guide-cta__inner {
      position: relative;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 32px;
      z-index: 1;
    }

    .guide-cta h2 {
      font-family: var(--font-display);
      font-size: clamp(22px, 2.8vw, 30px);
      font-weight: 680;
      margin-bottom: 12px;
      line-height: 1.35;
    }

    .guide-cta p {
      color: #c2d0e5;
      font-size: 15px;
      max-width: 610px;
      margin-bottom: 0;
    }

    .guide-cta p i {
      color: var(--gold);
      margin-right: 6px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      padding: 13px 22px;
      border-radius: var(--radius-sm);
      font-size: 15px;
      font-weight: 600;
      line-height: 1;
      background: rgba(255, 255, 255, 0.06);
      color: var(--head);
      border: 1px solid rgba(255, 255, 255, 0.16);
      transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
      white-space: nowrap;
    }

    .btn:hover {
      color: var(--head);
    }

    .btn-primary {
      background: linear-gradient(115deg, #3d7fff, #2f5de8);
      color: #fff;
      border-color: rgba(111, 227, 255, 0.25);
      box-shadow: 0 0 0 1px rgba(61, 127, 255, 0.12), 0 8px 30px rgba(61, 127, 255, 0.34);
    }

    .btn-primary:hover {
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 0 0 1px rgba(61, 127, 255, 0.2), 0 12px 36px rgba(61, 127, 255, 0.45);
      background: linear-gradient(115deg, #4c88ff, #3869e7);
    }

    .btn-primary:focus-visible, .btn:focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 4px;
    }

    .btn-primary:active {
      transform: translateY(0);
      box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.28);
    }

    .btn-ghost {
      background: transparent;
      color: var(--head);
      border-color: rgba(255, 255, 255, 0.42);
    }

    .btn-ghost:hover {
      border-color: var(--cyan);
      color: var(--cyan);
      background: rgba(111, 227, 255, 0.06);
    }

    .btn i {
      font-size: 14px;
    }

    .btn-disabled {
      background: rgba(255, 255, 255, 0.08);
      color: var(--disabled);
      border-color: var(--line);
      pointer-events: none;
    }

    .notes-section {
      padding: 30px 0 40px;
    }

    .notes-top {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 24px;
      margin-bottom: 32px;
    }

    .notes-top p {
      max-width: 470px;
      color: var(--muted);
      font-size: 14px;
    }

    .note-card {
      display: flex;
      flex-direction: column;
      height: 100%;
      border-radius: var(--radius-lg);
      overflow: hidden;
      background: rgba(255, 255, 255, 0.045);
      border: 1px solid rgba(255, 255, 255, 0.09);
      box-shadow: 0 20px 38px rgba(0, 0, 0, 0.2);
      transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
    }

    .note-card:hover {
      transform: translateY(-6px);
      border-color: rgba(111, 227, 255, 0.38);
      box-shadow: 0 28px 50px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(61, 127, 255, 0.08);
    }

    .card-media {
      position: relative;
      aspect-ratio: 4 / 3;
      overflow: hidden;
      background: var(--bg);
    }

    .card-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.88;
      transition: transform 0.45s ease, opacity 0.3s ease;
    }

    .note-card:hover .card-media img {
      transform: scale(1.05);
      opacity: 1;
    }

    .card-media::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(200deg, transparent 62%, rgba(3, 7, 15, 0.78) 100%);
      pointer-events: none;
    }

    .media-label {
      position: absolute;
      top: 14px;
      left: 14px;
      z-index: 2;
      padding: 5px 12px;
      font-size: 12px;
      line-height: 1.4;
      color: #fff;
      border-radius: var(--radius-pill);
      background: rgba(61, 127, 255, 0.86);
      border: 1px solid rgba(255, 255, 255, 0.2);
      backdrop-filter: blur(6px);
      box-shadow: 0 6px 18px rgba(2, 5, 12, 0.3);
    }

    .media-difficulty {
      position: absolute;
      right: 14px;
      bottom: 14px;
      z-index: 2;
      padding: 4px 11px;
      font-size: 11px;
      color: #c7d2e8;
      background: rgba(5, 11, 22, 0.7);
      border-radius: 8px;
      backdrop-filter: blur(8px);
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .note-card__body {
      display: flex;
      flex-direction: column;
      flex: 1;
      padding: 20px 20px 22px;
    }

    .note-card__body h3 {
      font-size: 18px;
      font-weight: 660;
      color: var(--head);
      line-height: 1.5;
      margin-bottom: 8px;
    }

    .note-card__body p {
      font-size: 14px;
      line-height: 1.8;
      color: #aab7d2;
      margin-bottom: 18px;
      flex: 1;
    }

    .note-title {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 12px;
      color: var(--muted);
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 14px;
      margin-top: auto;
    }

    .note-title i {
      color: var(--accent);
    }

    .note-title span + span::before {
      content: "·";
      display: inline-block;
      margin: 0 8px;
      color: rgba(255, 255, 255, 0.3);
    }

    .faq-section {
      padding: 44px 0 80px;
    }

    .faq-wrap {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-heading {
      text-align: center;
      margin: 0 auto 38px;
      max-width: 640px;
    }

    .faq-heading .section-title {
      margin-bottom: 12px;
    }

    .faq-heading p {
      color: var(--muted);
      font-size: 14px;
      line-height: 1.9;
      margin-top: 12px;
    }

    .accordion {
      display: block;
      background: transparent;
      margin: 0 auto;
    }

    .accordion-item {
      list-style: none;
      margin: 0 0 12px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
    }

    .accordion-item.is-active {
      border-color: rgba(111, 227, 255, 0.44);
      box-shadow: 0 0 0 1px rgba(61, 127, 255, 0.12), 0 18px 40px rgba(0, 0, 0, 0.24);
      background: rgba(255, 255, 255, 0.058);
    }

    .accordion-title {
      position: relative;
      display: block;
      padding: 20px 54px 20px 24px;
      border: 0;
      background: transparent;
      color: var(--head);
      font-size: 16px;
      font-weight: 600;
      line-height: 1.6;
      transition: color 0.2s ease;
    }

    .accordion-title:hover {
      background: rgba(255, 255, 255, 0.025);
      color: var(--accent);
    }

    .accordion-title:focus-visible {
      outline: 2px solid var(--cyan);
      outline-offset: -2px;
    }

    .accordion-title::before, .accordion-title::after {
      content: "";
      position: absolute;
      right: 25px;
      top: 28px;
      width: 15px;
      height: 2px;
      border-radius: 2px;
      background: var(--muted);
      transition: transform 0.2s ease, background 0.2s ease;
    }

    .accordion-title::after {
      transform: rotate(90deg);
      background: var(--muted);
    }

    .accordion-title:hover::before,
    .accordion-title:hover::after {
      background: var(--accent);
    }

    .accordion-item.is-active .accordion-title::after {
      transform: rotate(0deg);
    }

    .accordion-item.is-active .accordion-title {
      color: var(--head);
    }

    .accordion-content {
      padding: 0 24px 20px;
      color: #b0bdd7;
      font-size: 14px;
      border-top: 0;
      background: transparent;
    }

    .accordion-content p {
      line-height: 1.85;
      margin-bottom: 0;
    }

    .cta-foot {
      text-align: center;
      padding: 34px 0 16px;
    }

    .cta-foot a.btn-primary {
      padding: 14px 30px;
      font-size: 16px;
    }

    .site-footer {
      background: #03070f;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding: 62px 0 0;
      color: var(--text);
      position: relative;
    }

    .site-footer__grid {
      display: grid;
      grid-template-columns: 1.25fr 0.8fr 0.8fr 1fr;
      gap: 40px;
      padding-bottom: 40px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .site-footer__brand {
      padding-right: 12px;
    }

    .site-footer__brand .brand {
      margin-bottom: 18px;
    }

    .site-footer__brand p {
      color: #94a3bf;
      font-size: 14px;
      line-height: 1.9;
      max-width: 400px;
      margin-bottom: 20px;
    }

    .reveal-badge {
      display: inline-flex;
      align-items: center;
      gap: 9px;
      padding: 8px 14px;
      max-width: 100%;
      border-radius: var(--radius-pill);
      background: rgba(255, 255, 255, 0.045);
      border: 1px solid rgba(255, 255, 255, 0.11);
      font-size: 12px;
      color: var(--text);
      white-space: nowrap;
    }

    .reveal-badge i {
      color: var(--cyan);
    }

    .site-footer h4 {
      font-size: 15px;
      font-weight: 600;
      color: var(--head);
      margin-bottom: 18px;
      letter-spacing: 0.5px;
    }

    .site-footer__nav ul, .site-footer__contact p {
      display: grid;
      gap: 11px;
    }

    .site-footer__nav a {
      display: inline-flex;
      align-items: center;
      color: #8b9ab8;
      font-size: 14px;
      transition: all 0.2s ease;
    }

    .site-footer__nav a::before {
      content: "";
      width: 4px;
      height: 4px;
      margin-right: 10px;
      border-radius: 4px;
      background: rgba(255, 255, 255, 0.28);
      transition: all 0.2s ease;
    }

    .site-footer__nav a:hover {
      color: var(--cyan);
    }

    .site-footer__nav a:hover::before {
      background: var(--cyan);
      box-shadow: 0 0 8px var(--cyan);
    }

    .site-footer__contact p {
      margin: 0;
      color: #8b9ab8;
      font-size: 14px;
    }

    .site-footer__contact i {
      width: 18px;
      color: #6aa6ff;
    }

    .footer-line {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 22px 0 24px;
      color: #586887;
      font-size: 12px;
    }

    .footer-line a {
      color: inherit;
    }

    @media (max-width: 1024px) and (min-width: 641px) {
      .brand__name {
        font-size: 18px;
      }

      .nav-inner {
        gap: 8px;
        align-items: stretch;
      }

      .nav-tools {
        gap: 8px;
      }

      .nav-search {
        width: 190px;
      }

      .hot-list a {
        display: none;
      }

      .summary-block {
        grid-template-columns: 1fr;
      }

      .summary-copy {
        max-width: 100%;
      }

      .site-footer__grid {
        grid-template-columns: 1.2fr 0.8fr 0.9fr;
      }

      .site-footer__contact {
        grid-column: 1 / -1;
      }
    }

    @media (max-width: 640px) {
      :root {
        --section-y: 52px;
      }

      .header-top__inner {
        height: 60px;
      }

      .brand__mark {
        width: 38px;
        height: 38px;
        flex-basis: 38px;
        font-size: 15px;
        border-radius: 11px;
      }

      .brand__name {
        font-size: 17px;
      }

      .header-top__actions {
        gap: 10px;
      }

      .header-user span {
        display: none;
      }

      .header-user {
        width: 38px;
        height: 38px;
        padding: 0;
        justify-content: center;
        border-radius: 12px;
      }

      .menu-trigger {
        display: inline-flex;
      }

      .nav-inner {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        z-index: 55;
        max-height: 0;
        overflow: hidden;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: rgba(5, 11, 22, 0.98);
        border-bottom: 1px solid transparent;
        transition: max-height 0.25s ease;
      }

      .site-header.menu-open .nav-inner {
        max-height: 430px;
        border-bottom-color: rgba(255, 255, 255, 0.14);
        box-shadow: 0 16px 30px rgba(0, 0, 0, 0.3);
      }

      .primary-nav ul {
        flex-direction: column;
        align-items: stretch;
        padding: 12px 0 8px;
      }

      .primary-nav a {
        display: flex;
        border-radius: 10px;
        padding: 12px 18px;
      }

      .primary-nav a::after {
        display: none;
      }

      .primary-nav a.active {
        background: rgba(61, 127, 255, 0.12);
      }

      .nav-tools {
        flex-direction: column;
        align-items: stretch;
        gap: 14px;
        padding: 0 16px 20px;
      }

      .nav-search {
        width: 100%;
      }

      .hot-list {
        white-space: normal;
        flex-wrap: wrap;
      }

      .hot-list__label {
        width: 30px;
      }

      .category-hero {
        padding: 36px 0 28px;
      }

      .category-hero h1 {
        font-size: 29px;
      }

      .category-hero .lead-tools {
        align-items: flex-start;
        flex-direction: column;
        gap: 9px;
      }

      .summary-block {
        grid-template-columns: 1fr;
        gap: 30px;
      }

      .summary-list {
        grid-template-columns: 1fr;
      }

      .matrix-head {
        flex-direction: column;
        align-items: stretch;
      }

      .matrix-grid {
        grid-template-columns: 1fr;
      }

      .method-card {
        padding: 22px 18px;
        flex-direction: column;
        gap: 14px;
      }

      .guide-cta {
        padding: 28px 20px;
      }

      .guide-cta__inner {
        flex-direction: column;
        align-items: flex-start;
      }

      .guide-cta .btn {
        align-self: flex-start;
      }

      .notes-top {
        flex-direction: column;
        align-items: flex-start;
      }

      .footer-line {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
      }

      .site-footer__grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }

      .cta-foot .btn {
        width: 100%;
      }
    }