/* roulang page: index */
:root{
    --primary:#0B1026;
    --primary-alt:#101836;
    --primary-deep:#070B1A;
    --accent:#00D4FF;
    --accent-hover:#00B8E0;
    --promo:#FFB020;
    --promo-hover:#E59A15;
    --success:#10E57C;
    --error:#FF5D6C;
    --text-bright:#F5F8FF;
    --text-light:#CDD4EA;
    --text-body:#A0AAC8;
    --text-dim:#6B7394;
    --text-faint:#4A5170;
    --border:rgba(255,255,255,0.08);
    --border-strong:rgba(255,255,255,0.16);
    --radius-card:16px;
    --radius-btn:10px;
    --radius-input:12px;
    --shadow-card:0 8px 32px rgba(0,0,0,0.35);
    --shadow-glow:0 0 24px rgba(0,212,255,0.35);
    --shadow-glow-lg:0 0 40px rgba(0,212,255,0.55);
    --font-sans:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",sans-serif;
    --font-num:Inter,"SF Pro Display","Segoe UI",sans-serif;
    --spacing-section:96px;
    --spacing-section-sm:64px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
    font-family:var(--font-sans);
    background:var(--primary);
    color:var(--text-body);
    line-height:1.7;
    font-size:1rem;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
}
body.no-scroll{overflow:hidden;}
a{color:var(--accent);text-decoration:none;transition:color .2s ease,border-color .2s ease;}
a:hover{color:var(--accent-hover);}
img{max-width:100%;height:auto;display:block;}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
::selection{background:rgba(0,212,255,0.25);color:var(--text-bright);}

.container{max-width:1320px;padding-left:1.25rem;padding-right:1.25rem;}
.section-pad{padding:var(--spacing-section) 0;}
.section-bg-light{
    background:rgba(255,255,255,0.02);
    border-top:1px solid rgba(255,255,255,0.03);
    border-bottom:1px solid rgba(255,255,255,0.03);
}
.section-bg-deep{background:var(--primary-deep);}
.section-bg-image{
    background:linear-gradient(180deg,rgba(11,16,38,0.88) 0%,rgba(7,11,26,0.96) 100%),url('/assets/images/backpic/back-3.webp') center/cover fixed;
}
.section-title{color:var(--text-bright);font-weight:600;font-size:clamp(1.5rem,2.5vw,2.25rem);line-height:1.3;letter-spacing:-0.01em;}
.section-subtitle{color:var(--text-dark);font-size:1.0625rem;max-width:720px;margin:12px auto 0;color:var(--text-dim);}

/* ===== 按钮 ===== */
.btn-brand{
    background:linear-gradient(135deg,#00D4FF,#00A8E0);
    color:var(--primary);
    font-weight:600;
    font-size:1rem;
    padding:12px 28px;
    border-radius:var(--radius-btn);
    border:none;
    box-shadow:var(--shadow-glow);
    transition:all .25s ease;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    cursor:pointer;
    text-decoration:none;
    line-height:1.4;
}
.btn-brand:hover{
    color:var(--primary);
    box-shadow:var(--shadow-glow-lg);
    transform:translateY(-2px);
    background:linear-gradient(135deg,#00B8E0,#0096C8);
}
.btn-brand:active{transform:scale(0.98);box-shadow:var(--shadow-glow);}
.btn-outline{
    background:transparent;
    border:1px solid rgba(255,255,255,0.25);
    color:var(--text-bright);
    font-weight:600;
    font-size:1rem;
    padding:11px 28px;
    border-radius:var(--radius-btn);
    transition:all .25s ease;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    cursor:pointer;
    text-decoration:none;
}
.btn-outline:hover{
    border-color:var(--accent);
    color:var(--text-bright);
    background:rgba(0,212,255,0.08);
    transform:translateY(-2px);
}
.btn-outline:active{transform:scale(0.98);}
.btn-promo{
    background:linear-gradient(135deg,#FFB020,#F59110);
    color:var(--primary);
    font-weight:700;
    font-size:1.0625rem;
    padding:14px 40px;
    border-radius:var(--radius-btn);
    border:none;
    box-shadow:0 0 24px rgba(255,176,32,0.35);
    transition:all .25s ease;
    cursor:pointer;
    text-decoration:none;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    animation:pulseGlow 3s ease-in-out infinite;
}
.btn-promo:hover{
    box-shadow:0 0 48px rgba(255,176,32,0.55);
    transform:translateY(-2px);
    animation-play-state:paused;
    background:linear-gradient(135deg,#E59A15,#DD7F00);
    color:var(--primary);
}
.btn-promo:active{transform:scale(0.98);}
@keyframes pulseGlow{
    0%,100%{box-shadow:0 0 24px rgba(255,176,32,0.35);}
    50%{box-shadow:0 0 48px rgba(255,176,32,0.55);}
}
.btn:focus-visible,.btn-brand:focus-visible,.btn-outline:focus-visible,.btn-promo:focus-visible{
    outline:3px solid rgba(0,212,255,0.3);
    outline-offset:2px;
}

/* ===== 导航 ===== */
.site-header{
    position:fixed;
    top:0;left:0;right:0;
    z-index:1000;
    height:72px;
    background:rgba(11,16,38,0.75);
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    border-bottom:1px solid transparent;
    transition:background .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.site-header.scrolled{
    background:rgba(11,16,38,0.92);
    border-bottom-color:var(--border);
    box-shadow:0 4px 30px rgba(0,0,0,0.3);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px;}
.logo{
    display:inline-flex;
    align-items:center;
    gap:10px;
    font-size:1.25rem;
    font-weight:700;
    color:var(--text-bright);
    text-decoration:none;
    letter-spacing:-0.01em;
    transition:color .2s ease;
}
.logo:hover{color:var(--text-bright);opacity:0.85;}
.logo-mark{
    width:34px;height:34px;
    border-radius:8px;
    background:linear-gradient(135deg,#00D4FF,#00A8E0);
    display:inline-flex;
    align-items:center;
    justify-content:center;
    color:var(--primary);
    font-weight:800;
    font-size:18px;
    flex-shrink:0;
    box-shadow:0 0 14px rgba(0,212,255,0.4);
}
.main-nav{display:flex;align-items:center;gap:32px;list-style:none;margin:0;padding:0;}
.main-nav li a{
    color:rgba(245,248,255,0.8);
    font-size:0.9375rem;
    font-weight:500;
    text-decoration:none;
    padding:6px 2px;
    position:relative;
    transition:color .2s ease;
    white-space:nowrap;
}
.main-nav li a::after{
    content:'';
    position:absolute;
    left:0;right:0;bottom:-2px;
    height:2px;
    background:var(--accent);
    border-radius:2px;
    transform:scaleX(0);
    transform-origin:left;
    transition:transform .25s ease;
}
.main-nav li a:hover{color:var(--text-bright);}
.main-nav li a:hover::after{transform:scaleX(0.5);}
.main-nav li a.active{color:var(--text-bright);font-weight:600;}
.main-nav li a.active::after{transform:scaleX(1);}
.nav-cta{margin-left:8px;}
.nav-toggle{
    display:none;
    background:none;
    border:none;
    cursor:pointer;
    padding:8px;
    border-radius:6px;
}
.nav-toggle:focus-visible{outline:2px solid var(--accent);}
.nav-toggle span{
    display:block;
    width:22px;height:2px;
    background:var(--text-bright);
    border-radius:2px;
    margin:5px 0;
    transition:transform .3s ease,opacity .3s ease,background .3s ease;
}
.nav-toggle:hover span{background:var(--accent);}
.nav-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.active span:nth-child(2){opacity:0;}
.nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.mobile-overlay{
    position:fixed;
    inset:0;
    background:rgba(11,16,38,0.92);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    z-index:999;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:8px;
    opacity:0;
    visibility:hidden;
    transition:opacity .35s ease,visibility .35s ease;
}
.mobile-overlay.open{opacity:1;visibility:visible;}
.mobile-overlay a{
    font-size:1.5rem;
    color:var(--text-light);
    text-decoration:none;
    padding:14px 24px;
    border-radius:8px;
    transition:color .2s ease,background .2s ease;
    font-weight:500;
}
.mobile-overlay a:hover{color:var(--accent);}
.mobile-overlay a.active{color:var(--text-bright);font-weight:700;background:rgba(0,212,255,0.1);}
.mobile-overlay-close{
    position:absolute;
    top:20px;right:20px;
    background:none;
    border:none;
    color:var(--text-bright);
    font-size:28px;
    cursor:pointer;
    padding:8px;
    line-height:1;
}
.mobile-overlay-close:hover{color:var(--accent);}
.mobile-overlay-close:focus-visible{outline:2px solid var(--accent);}

/* ===== 移动端底部Tab ===== */
.mobile-tabs{
    display:none;
    position:fixed;
    bottom:0;left:0;right:0;
    height:64px;
    padding-bottom:env(safe-area-inset-bottom);
    background:rgba(7,11,26,0.95);
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    border-top:1px solid rgba(255,255,255,0.06);
    z-index:998;
}
.mobile-tabs-inner{
    display:flex;
    align-items:stretch;
    justify-content:space-around;
    height:64px;
}
.mobile-tab{
    flex:1;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:3px;
    color:rgba(255,255,255,0.6);
    text-decoration:none;
    font-size:0.734rem;
    transition:color .2s ease,background .2s ease;
    border:none;
    background:none;
    cursor:pointer;
    padding:0;
}
.mobile-tab i{font-size:1.25rem;line-height:1;}
.mobile-tab:hover{color:var(--text-bright);}
.mobile-tab.active{
    color:var(--accent);
    background:rgba(0,212,255,0.12);
}
.mobile-tab:focus-visible{outline:2px solid var(--accent);outline-offset:-2px;border-radius:8px;}

/* ===== Hero ===== */
.hero{
    min-height:100vh;
    background:linear-gradient(180deg,rgba(11,16,38,0.85) 0%,rgba(11,16,38,0.92) 60%,var(--primary) 100%),url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
    display:flex;
    align-items:center;
    padding:140px 0 80px;
    position:relative;
}
.hero-content{max-width:760px;}
.hero-badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    background:rgba(255,176,32,0.15);
    border:1px solid rgba(255,176,32,0.35);
    color:var(--promo);
    font-size:0.8125rem;
    font-weight:600;
    padding:6px 14px;
    border-radius:999px;
    letter-spacing:0.02em;
    margin-bottom:20px;
}
.hero-badge i{font-size:0.875rem;}
.hero h1{
    font-size:clamp(2rem,4vw,3.25rem);
    font-weight:700;
    line-height:1.2;
    color:var(--text-bright);
    letter-spacing:-0.02em;
    margin-bottom:16px;
}
.hero-sub{
    font-size:1.0625rem;
    color:var(--text-light);
    max-width:560px;
    line-height:1.7;
    margin-bottom:32px;
}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;}
.hero-meta{
    display:flex;
    align-items:center;
    flex-wrap:wrap;
    gap:16px;
    margin-top:48px;
    padding-top:24px;
    border-top:1px solid var(--border);
    color:var(--text-dim);
    font-size:0.875rem;
}
.hero-meta span{display:inline-flex;align-items:center;gap:6px;}

/* ===== 数据带 ===== */
.stats-band{
    background:rgba(255,255,255,0.02);
    border-top:1px solid var(--border);
    border-bottom:1px solid var(--border);
    padding:32px 0;
}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.stat-card{
    text-align:center;
    padding:24px 16px;
    background:rgba(255,255,255,0.05);
    border:1px solid var(--border);
    border-radius:var(--radius-card);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    transition:border-color .3s ease,transform .3s ease,box-shadow .3s ease;
}
.stat-card:hover{
    border-color:rgba(0,212,255,0.3);
    transform:translateY(-4px);
    box-shadow:var(--shadow-card);
}
.stat-number{
    font-family:var(--font-num);
    font-size:clamp(1.75rem,2.8vw,2.25rem);
    font-weight:700;
    color:var(--text-bright);
    line-height:1.2;
    font-variant-numeric:tabular-nums;
    letter-spacing:-0.02em;
}
.stat-label{font-size:0.875rem;color:var(--text-dim);margin-top:6px;}

/* ===== 优惠阶梯 ===== */
.tier-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch;}
.tier-card{
    position:relative;
    background:rgba(255,255,255,0.06);
    border:1px solid var(--border);
    border-radius:var(--radius-card);
    padding:32px 28px;
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease;
    display:flex;
    flex-direction:column;
}
.tier-card:hover{
    transform:translateY(-4px);
    border-color:rgba(0,212,255,0.3);
    box-shadow:0 16px 48px rgba(0,212,255,0.12);
}
.tier-card.featured{
    transform:scale(1.02);
    border-color:rgba(0,212,255,0.4);
    box-shadow:0 0 50px rgba(0,212,255,0.1),0 16px 48px rgba(0,0,0,0.4);
    z-index:2;
}
.tier-card.featured:hover{transform:translateY(-4px) scale(1.02);}
.tier-badge{
    position:absolute;
    top:-12px;left:50%;
    transform:translateX(-50%);
    background:linear-gradient(135deg,#00D4FF,#00A8E0);
    color:var(--primary);
    font-size:0.75rem;
    font-weight:700;
    padding:4px 14px;
    border-radius:999px;
    white-space:nowrap;
    box-shadow:0 4px 16px rgba(0,212,255,0.35);
}
.tier-name{font-size:1.25rem;font-weight:600;color:var(--text-bright);margin-bottom:8px;}
.tier-desc{font-size:0.875rem;color:var(--text-dim);margin-bottom:20px;}
.tier-price{
    display:flex;
    align-items:baseline;
    gap:4px;
    margin-bottom:24px;
}
.tier-price-num{
    font-family:var(--font-num);
    font-size:2.4rem;
    font-weight:700;
    color:var(--text-bright);
    line-height:1;
    font-variant-numeric:tabular-nums;
}
.tier-price-unit{font-size:0.875rem;color:var(--text-dim);}
.tier-features{list-style:none;padding:0;margin:0 0 28px;display:flex;flex-direction:column;gap:10px;flex:1;}
.tier-features li{
    display:flex;
    align-items:flex-start;
    gap:10px;
    font-size:0.9375rem;
    color:var(--text-body);
    line-height:1.5;
}
.tier-features li i{color:var(--accent);font-size:1rem;line-height:1.5;flex-shrink:0;}
.tier-card .btn{width:100%;}

/* ===== 套餐对比 ===== */
.compare-wrap{position:relative;}
.compare-scroll{
    overflow-x:auto;
    border-radius:var(--radius-card);
    background:rgba(255,255,255,0.04);
    border:1px solid var(--border);
    box-shadow:var(--shadow-card);
    -webkit-overflow-scrolling:touch;
}
.compare-scroll::-webkit-scrollbar{height:6px;}
.compare-scroll::-webkit-scrollbar-track{background:rgba(255,255,255,0.03);}
.compare-scroll::-webkit-scrollbar-thumb{background:rgba(255,255,255,0.15);border-radius:3px;}
.compare-grid{
    min-width:640px;
    width:100%;
    padding:24px;
}
.compare-row{
    display:grid;
    grid-template-columns:1.2fr 1fr 1fr 1fr 1fr;
    gap:16px;
    padding:12px 8px;
    border-bottom:1px solid rgba(255,255,255,0.05);
    align-items:center;
    transition:background .2s ease;
}
.compare-row:last-child{border-bottom:none;}
.compare-row:hover{background:rgba(255,255,255,0.02);}
.compare-row.header{padding-top:8px;padding-bottom:16px;border-bottom:1px solid var(--border-strong);}
.compare-feature{font-size:0.9375rem;color:var(--text-light);font-weight:500;}
.compare-plan{
    text-align:center;
    font-size:0.9375rem;
    color:var(--text-body);
}
.compare-plan.highlight{
    background:rgba(0,212,255,0.08);
    border-radius:10px;
    border:1px solid rgba(0,212,255,0.25);
    padding:8px 4px;
    font-weight:600;
    color:var(--text-bright);
}
.compare-plan-header{display:flex;flex-direction:column;align-items:center;gap:4px;}
.compare-plan-header .plan-name{font-weight:700;color:var(--text-bright);font-size:1rem;}
.compare-plan-header .plan-price{font-family:var(--font-num);font-size:1.125rem;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums;}
.compare-check{color:var(--accent);font-size:1rem;}
.compare-x{color:var(--text-faint);font-size:0.875rem;}
.compare-note{font-size:0.8125rem;color:var(--text-dim);margin-top:16px;display:flex;align-items:center;gap:8px;}
.compare-note i{color:var(--accent);}

/* ===== 限时入口 ===== */
.urgent-banner{
    position:relative;
    background:linear-gradient(180deg,rgba(11,16,38,0.82) 0%,rgba(7,11,26,0.94) 100%),url('/assets/images/backpic/back-2.png') center/cover no-repeat;
    border-radius:20px;
    overflow:hidden;
    padding:64px 48px;
    text-align:center;
    border:1px solid rgba(255,255,255,0.08);
}
.urgent-banner::before{
    content:'';
    position:absolute;
    inset:0;
    background:radial-gradient(ellipse at center,rgba(255,176,32,0.12) 0%,transparent 70%);
    pointer-events:none;
}
.urgent-content{position:relative;z-index:2;}
.urgent-banner h2{
    color:var(--text-bright);
    font-size:clamp(1.5rem,2.5vw,2.25rem);
    font-weight:700;
    margin-bottom:12px;
    letter-spacing:-0.01em;
}
.urgent-banner p{color:var(--text-light);font-size:1rem;margin-bottom:32px;max-width:480px;margin-left:auto;margin-right:auto;}
.countdown{
    display:flex;
    justify-content:center;
    align-items:center;
    gap:12px;
    margin-bottom:36px;
}
.countdown-block{
    background:rgba(7,11,26,0.7);
    border:1px solid rgba(255,255,255,0.12);
    border-radius:12px;
    padding:14px 10px;
    min-width:72px;
    text-align:center;
}
.countdown-block .num{
    display:block;
    font-family:var(--font-num);
    font-size:1.75rem;
    font-weight:700;
    color:var(--promo);
    line-height:1.1;
    font-variant-numeric:tabular-nums;
}
.countdown-block .label{
    display:block;
    font-size:0.75rem;
    color:var(--text-dim);
    margin-top:4px;
}
.countdown-colon{
    font-family:var(--font-num);
    font-size:1.5rem;
    color:var(--promo);
    opacity:0.6;
    font-weight:700;
}

/* ===== 资讯动态 ===== */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{
    background:rgba(255,255,255,0.06);
    border:1px solid var(--border);
    border-radius:var(--radius-card);
    overflow:hidden;
    display:flex;
    flex-direction:column;
    transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease;
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
}
.news-card:hover{
    transform:translateY(-4px);
    border-color:rgba(0,212,255,0.3);
    box-shadow:0 16px 48px rgba(0,212,255,0.12);
}
.news-cover{
    position:relative;
    aspect-ratio:16/9;
    overflow:hidden;
    background:var(--primary-alt);
}
.news-cover img{
    width:100%;height:100%;
    object-fit:cover;
    transition:transform .4s ease;
}
.news-card:hover .news-cover img{transform:scale(1.05);}
.news-badge{
    position:absolute;
    top:12px;left:12px;
    background:rgba(11,16,38,0.7);
    backdrop-filter:blur(8px);
    -webkit-backdrop-filter:blur(8px);
    color:var(--text-bright);
    font-size:0.75rem;
    padding:4px 12px;
    border-radius:999px;
    font-weight:500;
    border:1px solid rgba(255,255,255,0.1);
}
.news-body{padding:20px 22px;display:flex;flex-direction:column;flex:1;}
.news-body h3{
    font-size:1.0625rem;
    font-weight:600;
    color:var(--text-bright);
    line-height:1.5;
    margin-bottom:8px;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
}
.news-body p{
    font-size:0.9375rem;
    color:var(--text-body);
    margin-bottom:16px;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
    line-height:1.6;
}
.news-meta{
    display:flex;
    align-items:center;
    justify-content:space-between;
    margin-top:auto;
    font-size:0.8125rem;
    color:var(--text-dim);
}
.news-meta span{display:inline-flex;align-items:center;gap:5px;}
.news-meta a{
    color:var(--accent);
    font-weight:500;
    display:inline-flex;
    align-items:center;
    gap:4px;
    transition:gap .2s ease;
}
.news-meta a:hover{gap:8px;color:var(--accent-hover);}
.empty-state{
    text-align:center;
    padding:60px 20px;
    background:rgba(255,255,255,0.03);
    border:1px dashed var(--border-strong);
    border-radius:var(--radius-card);
    color:var(--text-dim);
    font-size:0.9375rem;
}

/* ===== FAQ ===== */
.faq-list{max-width:800px;margin:0 auto;}
.faq-item{
    background:rgba(255,255,255,0.04);
    border:1px solid var(--border);
    border-radius:var(--radius-card);
    margin-bottom:12px;
    overflow:hidden;
    transition:border-color .3s ease,background .3s ease;
}
.faq-item:hover{border-color:rgba(0,212,255,0.2);}
.faq-item.open{
    background:rgba(0,212,255,0.04);
    border-color:rgba(0,212,255,0.3);
}
.faq-question{
    width:100%;
    background:none;
    border:none;
    text-align:left;
    padding:20px 24px;
    font-size:1.0625rem;
    font-weight:600;
    color:var(--text-light);
    cursor:pointer;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    transition:color .2s ease;
    border-left:2px solid transparent;
}
.faq-item.open .faq-question{
    color:var(--text-bright);
    border-left-color:var(--accent);
}
.faq-question:hover{color:var(--text-bright);}
.faq-question:focus-visible{outline:2px solid var(--accent);outline-offset:-2px;border-radius:10px;}
.faq-icon{
    font-size:1rem;
    color:var(--text-dim);
    transition:transform .2s ease,color .2s ease;
    flex-shrink:0;
}
.faq-item.open .faq-icon{
    transform:rotate(180deg);
    color:var(--accent);
}
.faq-answer{
    padding:0 24px 20px;
    color:var(--text-body);
    font-size:0.9375rem;
    line-height:1.8;
    display:none;
}
.faq-item.open .faq-answer{display:block;}
.faq-answer p{color:var(--text-body);}

/* ===== 咨询表单 ===== */
.contact-section{
    background:linear-gradient(180deg,var(--primary) 0%,rgba(16,24,54,0.6) 100%);
}
.contact-grid{display:grid;grid-template-columns:5fr 7fr;gap:40px;}
.contact-info{padding:24px 0;}
.contact-info h2{
    color:var(--text-bright);
    font-size:clamp(1.5rem,2.5vw,2.25rem);
    font-weight:600;
    line-height:1.3;
    margin-bottom:16px;
}
.contact-info .lead{color:var(--text-light);margin-bottom:32px;max-width:420px;}
.contact-items{display:flex;flex-direction:column;gap:20px;}
.contact-item{display:flex;align-items:flex-start;gap:14px;}
.contact-item i{
    width:44px;height:44px;
    border-radius:10px;
    background:rgba(0,212,255,0.1);
    border:1px solid rgba(0,212,255,0.2);
    display:flex;
    align-items:center;
    justify-content:center;
    color:var(--accent);
    font-size:1.125rem;
    flex-shrink:0;
}
.contact-item .text{font-size:0.9375rem;color:var(--text-body);line-height:1.5;}
.contact-item .text strong{display:block;color:var(--text-light);font-size:0.9375rem;margin-bottom:2px;}
.contact-item .text span{font-family:var(--font-num);color:var(--text-body);}
.contact-card{
    background:rgba(255,255,255,0.05);
    border:1px solid var(--border);
    border-radius:20px;
    padding:36px;
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    box-shadow:var(--shadow-card);
}
.contact-card h3{
    color:var(--text-bright);
    font-size:1.25rem;
    font-weight:600;
    margin-bottom:24px;
}
.contact-card .form-label{color:var(--text-light);font-size:0.875rem;font-weight:500;margin-bottom:6px;}
.contact-card .form-label .required{color:var(--promo);margin-left:2px;}
.contact-card .form-control{
    background:rgba(0,0,0,0.3);
    border:1px solid rgba(255,255,255,0.12);
    border-radius:var(--radius-input);
    color:var(--text-bright);
    padding:12px 16px;
    font-size:0.9375rem;
    transition:border-color .25s ease,box-shadow .25s ease;
    height:auto;
    min-height:48px;
}
.contact-card .form-control::placeholder{color:#5A6285;}
.contact-card .form-control:focus{
    background:rgba(0,0,0,0.35);
    border-color:rgba(0,212,255,0.8);
    box-shadow:0 0 0 3px rgba(0,212,255,0.15);
    color:var(--text-bright);
}
.contact-card .form-control:focus-visible{outline:none;}
.contact-card select.form-control{appearance:none;-webkit-appearance:none;cursor:pointer;}
.contact-card select.form-control option{
    background:var(--primary-alt);
    color:var(--text-bright);
}
.contact-card textarea.form-control{min-height:120px;resize:vertical;}
.contact-card .form-group{margin-bottom:20px;}
.contact-card .btn-brand{width:100%;padding:14px 28px;font-size:1rem;}
.form-error{color:var(--error);font-size:0.8125rem;margin-top:4px;display:none;}
.contact-card .form-control.error{
    border-color:var(--error);
    box-shadow:0 0 0 3px rgba(255,93,108,0.15);
}
.contact-card .form-control.error + .form-error{display:block;}

/* ===== Toast ===== */
.toast-message{
    position:fixed;
    top:24px;right:24px;
    background:rgba(13,19,43,0.96);
    border:1px solid rgba(16,229,124,0.3);
    border-radius:12px;
    padding:16px 24px;
    color:var(--text-bright);
    font-size:0.9375rem;
    display:flex;
    align-items:center;
    gap:10px;
    box-shadow:0 8px 32px rgba(0,0,0,0.5);
    z-index:2000;
    transform:translateY(-20px);
    opacity:0;
    visibility:hidden;
    transition:all .3s ease;
}
.toast-message.show{transform:translateY(0);opacity:1;visibility:visible;}
.toast-message i{color:var(--success);font-size:1.125rem;}

/* ===== Footer ===== */
.site-footer{
    background:var(--primary-deep);
    padding:64px 0 32px;
    border-top:1px solid var(--border);
}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:40px;margin-bottom:48px;}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand p{font-size:0.9375rem;color:var(--text-dim);max-width:280px;line-height:1.7;}
.footer-col h4{
    color:var(--text-light);
    font-size:0.9375rem;
    font-weight:600;
    margin-bottom:18px;
    letter-spacing:0.02em;
}
.footer-col ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px;}
.footer-col ul a{
    color:var(--text-dim);
    font-size:0.875rem;
    text-decoration:none;
    transition:color .2s ease,padding-left .2s ease;
}
.footer-col ul a:hover{color:var(--accent);padding-left:4px;}
.footer-col ul a:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}
.footer-contact-item{display:flex;align-items:center;gap:10px;color:var(--text-dim);font-size:0.875rem;margin-bottom:10px;}
.footer-contact-item i{color:var(--accent);font-size:0.9375rem;}
.footer-bottom{
    border-top:1px solid var(--border);
    padding-top:24px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    flex-wrap:wrap;
}
.footer-bottom p{color:var(--text-faint);font-size:0.8125rem;margin:0;}
.footer-bottom .footer-links{display:flex;gap:20px;}
.footer-bottom .footer-links a{color:var(--text-faint);font-size:0.8125rem;text-decoration:none;transition:color .2s ease;}
.footer-bottom .footer-links a:hover{color:var(--accent);}

/* ===== 返回顶部 ===== */
.back-top{
    position:fixed;
    right:24px;
    bottom:96px;
    width:44px;height:44px;
    border-radius:12px;
    background:rgba(11,16,38,0.85);
    border:1px solid rgba(0,212,255,0.3);
    color:var(--accent);
    font-size:1.125rem;
    display:flex;
    align-items:center;
    justify-content:center;
    cursor:pointer;
    z-index:990;
    opacity:0;
    visibility:hidden;
    transform:translateY(10px);
    transition:all .3s ease;
    backdrop-filter:blur(8px);
    -webkit-backdrop-filter:blur(8px);
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.back-top:hover{
    background:var(--accent);
    color:var(--primary);
    box-shadow:var(--shadow-glow);
}
.back-top:active{transform:scale(0.95);}
.back-top:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}

/* ===== 响应式 ===== */
@media (max-width: 1199.98px){
    .compare-row{grid-template-columns:1fr 0.8fr 0.8fr 0.8fr 0.8fr;gap:12px;}
}
@media (max-width: 991.98px){
    .main-nav{display:none;}
    .nav-cta{display:none;}
    .nav-toggle{display:block;}
    .mobile-tabs{display:block;}
    .site-footer{padding-bottom:96px;}
    body{padding-bottom:0;}
    .section-pad{padding:var(--spacing-section-sm) 0;}
    .stats-grid{grid-template-columns:repeat(2,1fr);}
    .tier-grid{grid-template-columns:1fr;max-width:480px;margin:0 auto;}
    .tier-card.featured{transform:scale(1);}
    .tier-card.featured:hover{transform:translateY(-4px);}
    .news-grid{grid-template-columns:repeat(2,1fr);}
    .contact-grid{grid-template-columns:1fr;gap:32px;}
    .urgent-banner{padding:48px 24px;}
    .footer-grid{grid-template-columns:1fr;gap:32px;}
    .countdown{gap:8px;}
    .countdown-block{min-width:60px;padding:10px 6px;}
    .countdown-block .num{font-size:1.35rem;}
}
@media (max-width: 767.98px){
    html{font-size:15px;}
    .section-pad{padding:64px 0;}
    .hero{padding-top:120px;padding-bottom:64px;min-height:80vh;}
    .hero h1{font-size:clamp(1.75rem,5.5vw,2.25rem);}
    .hero-sub{font-size:1rem;}
    .hero-actions .btn{width:100%;}
    .hero-actions{flex-direction:column;gap:12px;}
    .news-grid{grid-template-columns:1fr;}
    .stats-grid{gap:16px;}
    .stat-card{padding:16px 12px;}
    .contact-card{padding:24px 20px;}
    .btn-brand,.btn-outline{width:100%;}
    .footer-bottom{flex-direction:column;text-align:center;}
    .compare-wrap{margin:0 -16px;}
    .compare-scroll{border-radius:0;border-left:none;border-right:none;}
}
@media (max-width: 575.98px){
    .contact-info h2,.section-title{font-size:1.375rem;}
    .stats-grid{grid-template-columns:1fr 1fr;}
    .countdown{gap:6px;}
    .countdown-block{min-width:54px;}
    .countdown-block .num{font-size:1.15rem;}
    .urgent-banner{padding:40px 16px;}
    .urgent-banner h2{font-size:1.375rem;}
    .btn-promo{width:100%;}
    .mobile-tab i{font-size:1.125rem;}
}
@media (min-width: 992px){
    .mobile-overlay{display:none;}
    .mobile-tabs{display:none;}
}
@media (min-width: 1200px){
    .container{max-width:1320px;}
}
@media (max-width: 480px){
    .mobile-tabs{display:flex;}
    .mobile-tabs-inner{gap:0;}
    .mobile-tab{font-size:0.6875rem;}
    .mobile-tab i{font-size:1.0625rem;}
}

/* roulang page: category1 */
:root {
  --bg-primary: #0B1026;
  --bg-secondary: #070B1A;
  --bg-panel: #101836;
  --bg-panel-light: #1A2550;
  --accent-cyan: #00D4FF;
  --accent-cyan-hover: #00B8E0;
  --accent-amber: #FFB020;
  --accent-amber-hover: #E59A15;
  --success: #10E57C;
  --error: #FF5D6C;
  --text-white: #F5F8FF;
  --text-light: #CDD4EA;
  --text-body: #A0AAC8;
  --text-muted: #6B7394;
  --text-dim: #4A5170;
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-input: 12px;
  --radius-badge: 999px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.35);
  --shadow-glow: 0 0 24px rgba(0,212,255,0.35);
  --shadow-glow-hover: 0 0 40px rgba(0,212,255,0.55);
  --border-white: rgba(255,255,255,0.08);
  --space-section: 96px;
  --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-num: "Inter", "SF Pro Display", "Helvetica Neue", sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-cn);
  background: var(--bg-primary);
  color: var(--text-body);
  line-height: 1.7;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
ul, ol { list-style: none; }
a { text-decoration: none; color: inherit; transition: color .25s ease; }
img { max-width: 100%; height: auto; display: block; }
button { border: none; background: none; cursor: pointer; font-family: inherit; }
input, select, textarea { font-family: inherit; }
.container { max-width: 1320px; margin: 0 auto; padding: 0 24px; }
section { padding: var(--space-section) 0; position: relative; }

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: 72px;
  background: rgba(11,16,38,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: background .3s ease, box-shadow .3s ease;
}
.site-header.scrolled {
  background: rgba(11,16,38,0.95);
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo:hover { opacity: .85; }
.logo-mark {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--accent-cyan), #00A8E0);
  color: var(--bg-primary);
  font-size: 1.1rem;
  font-weight: 700;
  border-radius: 9px;
  font-family: var(--font-num);
}
.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-white);
  letter-spacing: 0.01em;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}
.main-nav a {
  color: var(--text-light);
  font-size: 0.9375rem;
  font-weight: 500;
  position: relative;
  padding: 6px 0;
  transition: color .25s;
}
.main-nav a:hover { color: var(--text-white); }
.main-nav a.active {
  color: var(--text-white);
}
.main-nav a.active::after {
  content: "";
  position: absolute;
  bottom: 0; left: 0;
  width: 100%; height: 2px;
  background: var(--accent-cyan);
  border-radius: 2px;
}
.nav-cta { flex-shrink: 0; }
.btn-brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 26px;
  background: linear-gradient(135deg, var(--accent-cyan), #00A8E0);
  color: var(--bg-primary);
  font-weight: 600;
  font-size: 0.9375rem;
  border-radius: var(--radius-btn);
  box-shadow: var(--shadow-glow);
  transition: all .25s ease;
  border: none;
  line-height: 1.4;
}
.btn-brand:hover {
  box-shadow: var(--shadow-glow-hover);
  transform: translateY(-2px);
  color: var(--bg-primary);
}
.btn-brand:active { transform: scale(0.98); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 26px;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.25);
  color: var(--text-white);
  font-weight: 500;
  font-size: 0.9375rem;
  border-radius: var(--radius-btn);
  transition: all .25s ease;
  line-height: 1.4;
}
.btn-outline:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}
.btn-outline:active { transform: scale(0.98); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 10px;
  z-index: 1200;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text-white);
  border-radius: 2px;
  transition: all .3s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

.mobile-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(11,16,38,0.95);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  z-index: 1100;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  opacity: 0;
  visibility: hidden;
  transition: all .3s ease;
}
.mobile-overlay.open { opacity: 1; visibility: visible; }
.mobile-overlay a {
  font-size: 1.5rem;
  color: var(--text-light);
  font-weight: 600;
  transition: color .25s;
}
.mobile-overlay a:hover,
.mobile-overlay a.active { color: var(--accent-cyan); }

/* ===== Mobile Tabbar ===== */
.mobile-tabbar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: 64px;
  background: rgba(11,16,38,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid rgba(255,255,255,0.06);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: space-around;
  padding-bottom: env(safe-area-inset-bottom);
}
.mobile-tabbar .tab-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 8px 12px;
  color: rgba(255,255,255,0.6);
  transition: color .25s;
}
.mobile-tabbar .tab-item i { font-size: 1.25rem; }
.mobile-tabbar .tab-item span { font-size: 0.75rem; }
.mobile-tabbar .tab-item.active {
  color: var(--accent-cyan);
  background: rgba(0,212,255,0.12);
  border-radius: 12px;
}
.mobile-tabbar .tab-item:hover { color: var(--text-white); }

/* ===== Page Hero ===== */
.page-hero {
  min-height: 40vh;
  display: flex;
  align-items: center;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  position: relative;
  padding: 140px 0 80px;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11,16,38,0.8) 0%, rgba(11,16,38,0.92) 100%);
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero-inner {
  max-width: 820px;
  padding: 24px 0;
}
.hero-badge {
  display: inline-block;
  padding: 6px 18px;
  background: rgba(255,176,32,0.15);
  border: 1px solid rgba(255,176,32,0.4);
  color: var(--accent-amber);
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: var(--radius-badge);
  margin-bottom: 20px;
}
.page-hero h1 {
  font-family: var(--font-cn);
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-white);
  margin-bottom: 20px;
  letter-spacing: 0.01em;
}
.page-hero .hero-desc {
  font-size: 1.0625rem;
  color: var(--text-light);
  max-width: 680px;
  line-height: 1.7;
  margin-bottom: 32px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* ===== Section Headers ===== */
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}
.section-head .section-tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(0,212,255,0.1);
  border: 1px solid rgba(0,212,255,0.25);
  color: var(--accent-cyan);
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: var(--radius-badge);
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: clamp(1.5rem, 2.5vw, 2.25rem);
  font-weight: 600;
  color: var(--text-white);
  line-height: 1.3;
  margin-bottom: 12px;
}
.section-head p {
  color: var(--text-body);
  font-size: 1rem;
  line-height: 1.7;
}

/* ===== Service Cards ===== */
.service-card-list { display: flex; flex-direction: column; gap: 32px; }
.service-card-item {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 32px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-white);
  border-radius: var(--radius-card);
  padding: 28px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: all .3s ease;
}
.service-card-item:hover {
  transform: translateY(-4px);
  border-color: rgba(0,212,255,0.3);
  box-shadow: 0 16px 48px rgba(0,212,255,0.12);
}
.service-card-media {
  border-radius: 12px;
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--bg-panel-light);
}
.service-card-media img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.service-card-item:hover .service-card-media img { transform: scale(1.04); }
.service-card-body { display: flex; flex-direction: column; justify-content: center; }
.service-card-body h3 {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 10px;
}
.service-card-body p {
  color: var(--text-body);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-bottom: 18px;
}
.service-card-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.service-card-tags .tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(0,212,255,0.08);
  border: 1px solid rgba(0,212,255,0.2);
  color: var(--text-light);
  font-size: 0.8125rem;
  border-radius: var(--radius-badge);
}
.service-card-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.service-card-actions .btn-outline { padding: 8px 20px; font-size: 0.875rem; }
.service-card-actions .btn-brand { padding: 8px 20px; font-size: 0.875rem; }

/* ===== Process ===== */
.process-section { background: var(--bg-secondary); }
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.process-item {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border-white);
  border-radius: var(--radius-card);
  padding: 32px 24px;
  text-align: center;
  transition: all .3s ease;
  position: relative;
}
.process-item:hover {
  border-color: rgba(0,212,255,0.3);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.25);
}
.process-number {
  width: 48px; height: 48px;
  margin: 0 auto 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(0,212,255,0.2), rgba(0,212,255,0.05));
  border: 1px solid rgba(0,212,255,0.3);
  color: var(--accent-cyan);
  font-family: var(--font-num);
  font-size: 1.25rem;
  font-weight: 700;
  border-radius: 12px;
}
.process-item h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 8px;
}
.process-item p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ===== Features ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-white);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  transition: all .3s ease;
  text-align: center;
}
.feature-card:hover {
  border-color: rgba(0,212,255,0.3);
  transform: translateY(-4px);
  box-shadow: 0 12px 36px rgba(0,0,0,0.25);
}
.feature-card i {
  font-size: 2rem;
  color: var(--accent-cyan);
  display: block;
  margin-bottom: 16px;
}
.feature-card h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ===== CTA Strip ===== */
.cta-strip {
  background: rgba(0,212,255,0.06);
  border: 1px solid rgba(0,212,255,0.3);
  border-radius: var(--radius-card);
  max-width: 1100px;
  margin: 0 auto;
  padding: 36px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-strip h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 6px;
}
.cta-strip p {
  font-size: 0.9375rem;
  color: var(--text-body);
  margin: 0;
}

/* ===== FAQ ===== */
.faq-section { background: var(--bg-secondary); }
.accordion-item {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-white);
  border-radius: var(--radius-card) !important;
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color .3s ease;
}
.accordion-item:has(.accordion-button:not(.collapsed)) {
  border-color: rgba(0,212,255,0.3);
  background: rgba(0,212,255,0.04);
}
.accordion-button {
  background: transparent;
  color: var(--text-light);
  font-size: 1.0625rem;
  font-weight: 500;
  padding: 20px 24px;
  box-shadow: none;
  border: none;
  text-align: left;
  transition: color .3s ease, background .3s ease;
}
.accordion-button:focus {
  box-shadow: 0 0 0 3px rgba(0,212,255,0.15);
  outline: none;
}
.accordion-button:not(.collapsed) {
  color: var(--text-white);
  background: transparent;
  box-shadow: none;
  border-left: 3px solid var(--accent-cyan);
}
.accordion-button::after {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2300D4FF'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
  transition: transform .2s ease;
}
.accordion-button:not(.collapsed)::after { transform: rotate(180deg); }
.accordion-body {
  padding: 0 24px 20px;
  color: var(--text-body);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-secondary);
  padding: 72px 0 32px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  margin-bottom: 24px;
}
.footer-brand p {
  margin-top: 16px;
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 360px;
}
.footer-col h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 18px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color .25s ease;
}
.footer-col ul a:hover { color: var(--accent-cyan); }
.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 0.875rem;
  color: var(--text-muted);
}
.footer-contact-item i { color: var(--accent-cyan); font-size: 1rem; }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-bottom p {
  font-size: 0.8125rem;
  color: var(--text-dim);
  margin: 0;
}
.footer-links { display: flex; gap: 20px; }
.footer-links a {
  font-size: 0.8125rem;
  color: var(--text-dim);
  transition: color .25s;
}
.footer-links a:hover { color: var(--accent-cyan); }

/* ===== Back to top ===== */
.back-top {
  position: fixed;
  right: 24px;
  bottom: 80px;
  width: 44px; height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(11,16,38,0.85);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 50%;
  color: var(--text-white);
  font-size: 1.125rem;
  z-index: 900;
  opacity: 0;
  visibility: hidden;
  transition: all .3s ease;
  backdrop-filter: blur(8px);
}
.back-top.show { opacity: 1; visibility: visible; }
.back-top:hover {
  background: rgba(0,212,255,0.2);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}
.back-top:active { transform: scale(0.92); }

/* ===== Responsive ===== */
@media (max-width: 991.98px) {
  .main-nav { display: none; }
  .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .mobile-tabbar { display: flex; }
  body { padding-bottom: 64px; }
  .page-hero { padding-top: 120px; }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767.98px) {
  :root { --space-section: 64px; }
  .container { padding: 0 20px; }
  .service-card-item {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 20px;
  }
  .page-hero { min-height: auto; padding: 120px 0 60px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn-brand,
  .hero-actions .btn-outline { width: 100%; }
  .cta-strip { padding: 28px 20px; flex-direction: column; text-align: center; }
  .cta-strip .btn-brand { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }
  .process-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .section-head { margin-bottom: 40px; }
}
@media (max-width: 575.98px) {
  body { font-size: 0.9375rem; }
  .logo-text { font-size: 1.1rem; }
  .logo-mark { width: 32px; height: 32px; font-size: 1rem; }
  .service-card-actions .btn-brand,
  .service-card-actions .btn-outline { width: 100%; }
  .page-hero h1 { font-size: 1.75rem; }
  .page-hero .hero-desc { font-size: 0.9375rem; }
}

/* roulang page: category2 */
:root {
            --bg-deep: #0B1026;
            --bg-dark: #070B1A;
            --bg-alt: #101836;
            --bg-grid: #1A2550;
            --bg-card: rgba(255, 255, 255, 0.06);
            --border-white: rgba(255, 255, 255, 0.08);
            --border-light: rgba(255, 255, 255, 0.12);
            --brand: #00D4FF;
            --brand-hover: #00B8E0;
            --accent: #FFB020;
            --accent-hover: #E59A15;
            --success: #10E57C;
            --error: #FF5D6C;
            --text-main: #F5F8FF;
            --text-light: #CDD4EA;
            --text-muted: #A0AAC8;
            --text-dim: #6B7394;
            --text-faint: #4A5170;
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-input: 12px;
            --radius-badge: 999px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-brand: 0 16px 48px rgba(0, 212, 255, 0.12);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --font-num: "Inter", "SF Pro Display", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            background-color: var(--bg-deep);
            color: var(--text-light);
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
        }

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        .container {
            max-width: 1320px;
            padding-left: 20px;
            padding-right: 20px;
            margin-left: auto;
            margin-right: auto;
        }

        .section {
            padding: 96px 0;
        }

        .section-sm {
            padding: 64px 0;
        }

        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }

        .section-overline {
            display: inline-block;
            font-size: 0.8125rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--brand);
            border: 1px solid rgba(0, 212, 255, 0.35);
            background: rgba(0, 212, 255, 0.08);
            padding: 6px 18px;
            border-radius: var(--radius-badge);
            margin-bottom: 16px;
        }

        .section-head h2 {
            font-size: clamp(1.5rem, 2.5vw, 2.25rem);
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.3;
            margin: 0 0 12px;
        }

        .section-head p {
            font-size: 1rem;
            color: var(--text-muted);
            margin: 0;
        }

        .btn-brand,
        .btn-outline,
        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 1rem;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            border: none;
            cursor: pointer;
            transition: all 0.25s ease;
        }

        .btn-brand {
            background: linear-gradient(135deg, #00D4FF, #00A8E0);
            color: var(--bg-deep);
            box-shadow: 0 0 24px rgba(0, 212, 255, 0.35);
        }

        .btn-brand:hover {
            box-shadow: 0 0 40px rgba(0, 212, 255, 0.55);
            transform: translateY(-2px);
            color: var(--bg-deep);
        }

        .btn-brand:active {
            transform: scale(0.98);
        }

        .btn-outline {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: var(--text-main);
        }

        .btn-outline:hover {
            border-color: var(--brand);
            color: var(--brand);
            transform: translateY(-2px);
        }

        .btn-outline:active {
            transform: scale(0.98);
        }

        .btn-accent {
            background: linear-gradient(135deg, #FFB020, #F59110);
            color: var(--bg-deep);
            box-shadow: 0 0 24px rgba(255, 176, 32, 0.35);
            animation: pulse-glow 3s ease-in-out infinite;
        }

        .btn-accent:hover {
            box-shadow: 0 0 40px rgba(255, 176, 32, 0.6);
            transform: translateY(-2px);
            color: var(--bg-deep);
            animation-play-state: paused;
        }

        .btn-accent:active {
            transform: scale(0.98);
        }

        @keyframes pulse-glow {
            0%, 100% {
                box-shadow: 0 0 18px rgba(255, 176, 32, 0.3);
            }
            50% {
                box-shadow: 0 0 36px rgba(255, 176, 32, 0.55);
            }
        }

        /* ===== Header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1030;
            height: 72px;
            background: rgba(11, 16, 38, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            background: rgba(11, 16, 38, 0.92);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            flex-wrap: nowrap;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, #00D4FF, #0088CC);
            color: var(--bg-deep);
            font-size: 1.375rem;
            font-weight: 800;
            font-family: var(--font-sans);
            box-shadow: 0 0 16px rgba(0, 212, 255, 0.3);
        }

        .logo-text {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: 0.02em;
        }

        .logo:hover .logo-text {
            opacity: 0.85;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .main-nav li {
            position: relative;
        }

        .main-nav a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            padding: 8px 2px;
            position: relative;
        }

        .main-nav a::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            background: var(--brand);
            border-radius: 2px;
            transform: scaleX(0);
            transition: transform 0.25s ease;
        }

        .main-nav a:hover,
        .main-nav a.active {
            color: var(--text-main);
        }

        .main-nav a:hover::after,
        .main-nav a.active::after {
            transform: scaleX(1);
        }

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .nav-cta .btn-brand {
            padding: 10px 22px;
            font-size: 0.9375rem;
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            width: 42px;
            height: 42px;
            padding: 8px;
            cursor: pointer;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            border-radius: 10px;
        }

        .nav-toggle span {
            display: block;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: transform 0.25s ease, opacity 0.25s ease;
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            inset: 0;
            z-index: 1029;
            background: rgba(11, 16, 38, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            padding: 100px 32px 32px;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu ul {
            list-style: none;
            margin: 0;
            padding: 0;
            width: 100%;
        }

        .mobile-menu li {
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .mobile-menu a {
            display: block;
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--text-main);
            padding: 18px 12px;
            text-align: center;
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--brand);
        }

        .mobile-menu .menu-close {
            position: absolute;
            top: 20px;
            right: 20px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-light);
            border-radius: 10px;
            width: 42px;
            height: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-main);
            font-size: 1.25rem;
            cursor: pointer;
        }

        /* ===== Mobile Tabbar ===== */
        .mobile-tabbar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 1030;
            height: calc(64px + env(safe-area-inset-bottom));
            padding-bottom: env(safe-area-inset-bottom);
            background: rgba(11, 16, 38, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            align-items: center;
            justify-content: space-around;
        }

        .mobile-tabbar .tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2px;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.6875rem;
            font-weight: 500;
            min-width: 56px;
            padding: 6px 8px;
            border-radius: 12px;
            transition: all 0.2s ease;
        }

        .mobile-tabbar .tab-item i {
            font-size: 1.25rem;
            line-height: 1;
        }

        .mobile-tabbar .tab-item:hover,
        .mobile-tabbar .tab-item.active {
            color: var(--brand);
            background: rgba(0, 212, 255, 0.12);
        }

        .mobile-tabbar .tab-cta {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2px;
            width: 58px;
            height: 58px;
            border-radius: 50%;
            background: linear-gradient(135deg, #00D4FF, #00A8E0);
            color: var(--bg-deep);
            font-size: 0.75rem;
            font-weight: 700;
            box-shadow: 0 0 24px rgba(0, 212, 255, 0.4);
            transform: translateY(-8px);
        }

        .mobile-tabbar .tab-cta i {
            font-size: 1.375rem;
            line-height: 1;
        }

        .mobile-tabbar .tab-cta span {
            font-size: 0.6875rem;
            font-weight: 700;
        }

        .mobile-tabbar .tab-cta:hover {
            box-shadow: 0 0 36px rgba(0, 212, 255, 0.6);
            transform: translateY(-8px) scale(1.03);
            color: var(--bg-deep);
        }

        .mobile-tabbar .tab-cta:active {
            transform: translateY(-6px) scale(0.96);
        }

        /* ===== Hero ===== */
        .cat-hero {
            position: relative;
            min-height: 44vh;
            display: flex;
            align-items: center;
            background-size: cover;
            background-position: center;
            padding-top: 120px;
            padding-bottom: 64px;
        }

        .cat-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 16, 38, 0.75) 0%, rgba(11, 16, 38, 0.92) 100%);
        }

        .cat-hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
        }

        .cat-hero-badge {
            display: inline-block;
            font-size: 0.8125rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: var(--brand);
            background: rgba(0, 212, 255, 0.1);
            border: 1px solid rgba(0, 212, 255, 0.3);
            border-radius: var(--radius-badge);
            padding: 6px 18px;
            margin-bottom: 20px;
        }

        .cat-hero h1 {
            font-family: var(--font-sans);
            font-size: clamp(1.9rem, 3.6vw, 3rem);
            font-weight: 700;
            line-height: 1.2;
            color: var(--text-main);
            margin: 0 0 16px;
            letter-spacing: 0.01em;
        }

        .cat-hero-desc {
            font-size: 1.0625rem;
            line-height: 1.7;
            color: var(--text-light);
            max-width: 640px;
            margin: 0 0 28px;
        }

        .cat-hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        /* ===== Scene Blocks ===== */
        .scene-section {
            position: relative;
            padding: 96px 0;
        }

        .scene-section + .scene-section {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .scene-section.bg-dark {
            background: var(--bg-dark);
        }

        .scene-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .scene-block.reverse .scene-media {
            order: 2;
        }

        .scene-block.reverse .scene-content {
            order: 1;
        }

        .scene-media {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            aspect-ratio: 4 / 3;
            background-color: var(--bg-grid);
        }

        .scene-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .scene-media:hover img {
            transform: scale(1.03);
        }

        .scene-media::after {
            content: "";
            position: absolute;
            inset: 0;
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-card);
            pointer-events: none;
        }

        .scene-content {
            padding: 24px 0;
        }

        .scene-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(0, 212, 255, 0.1);
            border: 1px solid rgba(0, 212, 255, 0.3);
            color: var(--brand);
            font-family: var(--font-num);
            font-size: 1.125rem;
            font-weight: 700;
            margin-bottom: 18px;
        }

        .scene-content h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--text-main);
            margin: 0 0 14px;
            line-height: 1.4;
        }

        .scene-content p {
            font-size: 1rem;
            color: var(--text-muted);
            margin: 0 0 22px;
            line-height: 1.8;
        }

        .scene-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .scene-tags li {
            display: inline-flex;
            align-items: center;
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--text-light);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-badge);
            padding: 6px 16px;
        }

        .scene-tags li::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--brand);
            margin-right: 8px;
        }

        /* ===== Data band ===== */
        .data-band {
            background: var(--bg-dark);
            padding: 64px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .data-item {
            text-align: center;
            padding: 32px 16px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.07);
            border-radius: var(--radius-card);
            transition: border-color 0.25s ease, transform 0.25s ease;
        }

        .data-item:hover {
            border-color: rgba(0, 212, 255, 0.3);
            transform: translateY(-4px);
        }

        .data-item .data-num {
            font-family: var(--font-num);
            font-size: 2.25rem;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.2;
            font-variant-numeric: tabular-nums;
        }

        .data-item .data-num .unit {
            font-size: 1rem;
            color: var(--brand);
            font-weight: 600;
            margin-left: 2px;
        }

        .data-item .data-label {
            font-size: 0.875rem;
            color: var(--text-dim);
            margin-top: 8px;
        }

        /* ===== Process ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 48px;
        }

        .process-card {
            background: var(--bg-card);
            border: 1px solid var(--border-white);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            transition: all 0.25s ease;
            position: relative;
        }

        .process-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 212, 255, 0.3);
            box-shadow: var(--shadow-brand);
        }

        .process-step {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: linear-gradient(135deg, #00D4FF, #00A8E0);
            color: var(--bg-deep);
            font-family: var(--font-num);
            font-weight: 700;
            font-size: 1.125rem;
            margin-bottom: 16px;
        }

        .process-card h4 {
            font-size: 1.125rem;
            font-weight: 600;
            color: var(--text-main);
            margin: 0 0 10px;
        }

        .process-card p {
            font-size: 0.9375rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.65;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 96px 0;
        }

        .faq-wrap {
            max-width: 840px;
            margin: 0 auto;
        }

        .accordion-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08) !important;
            border-radius: var(--radius-card) !important;
            margin-bottom: 12px;
            overflow: hidden;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
        }

        .accordion-item:last-child {
            margin-bottom: 0;
        }

        .accordion-item .accordion-button {
            background: transparent;
            color: var(--text-main);
            font-size: 1.0625rem;
            font-weight: 600;
            padding: 20px 24px;
            box-shadow: none;
            border: none;
            border-radius: var(--radius-card) !important;
            transition: background 0.2s ease;
        }

        .accordion-item .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2300D4FF' viewBox='0 0 16 16'%3E%3Cpath d='M8 4a.5.5 0 0 1 .5.5v3h3a.5.5 0 0 1 0 1h-3v3a.5.5 0 0 1-1 0v-3h-3a.5.5 0 0 1 0-1h3v-3A.5.5 0 0 1 8 4z'/%3E%3C/svg%3E");
            transition: transform 0.2s ease;
        }

        .accordion-item .accordion-button:not(.collapsed) {
            background: rgba(0, 212, 255, 0.04);
            color: var(--text-main);
            box-shadow: none;
        }

        .accordion-item .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
        }

        .accordion-item .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.12);
            border-color: transparent;
        }

        .accordion-item .accordion-body {
            padding: 0 24px 20px;
            color: var(--text-muted);
            font-size: 0.9375rem;
            line-height: 1.75;
            border-left: 2px solid var(--brand);
            margin-left: 24px;
            padding-left: 18px;
        }

        /* ===== CTA ===== */
        .cat-cta {
            padding: 48px 0 96px;
        }

        .cta-strip {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            background: rgba(0, 212, 255, 0.06);
            border: 1px solid rgba(0, 212, 255, 0.2);
            border-radius: var(--radius-card);
            padding: 32px 40px;
            flex-wrap: wrap;
        }

        .cta-strip h3 {
            font-size: 1.375rem;
            font-weight: 600;
            color: var(--text-main);
            margin: 0 0 6px;
        }

        .cta-strip p {
            font-size: 0.9375rem;
            color: var(--text-muted);
            margin: 0;
        }

        .cta-strip .btn-brand {
            flex-shrink: 0;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            padding: 64px 0 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer-brand .logo {
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 0.9375rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
            margin: 0;
        }

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
            margin: 0 0 18px;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul a {
            font-size: 0.915rem;
            color: var(--text-muted);
            transition: color 0.2s ease;
        }

        .footer-col ul a:hover {
            color: var(--brand);
        }

        .footer-contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.915rem;
            color: var(--text-muted);
            margin-bottom: 10px;
        }

        .footer-contact-item i {
            color: var(--brand);
            font-size: 0.875rem;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 24px;
        }

        .footer-bottom p {
            font-size: 0.875rem;
            color: var(--text-faint);
            margin: 0;
        }

        .footer-links {
            display: flex;
            gap: 20px;
        }

        .footer-links a {
            font-size: 0.875rem;
            color: var(--text-dim);
        }

        .footer-links a:hover {
            color: var(--brand);
        }

        /* ===== Responsive ===== */
        @media (max-width: 991.98px) {
            .site-header {
                height: 64px;
            }

            .main-nav,
            .nav-cta .btn-brand {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .mobile-tabbar {
                display: flex;
            }

            body {
                padding-bottom: calc(64px + env(safe-area-inset-bottom));
            }

            .section,
            .faq-section {
                padding: 72px 0;
            }

            .data-grid,
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .scene-block {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .scene-block.reverse .scene-media,
            .scene-block.reverse .scene-content {
                order: initial;
            }

            .scene-media {
                aspect-ratio: 16 / 10;
            }

            .cta-strip {
                padding: 28px;
            }
        }

        @media (max-width: 767.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .section,
            .faq-section {
                padding: 64px 0;
            }

            .section-head {
                margin-bottom: 40px;
            }

            .cat-hero {
                min-height: 52vh;
                padding-top: 96px;
            }

            .cat-hero h1 {
                font-size: 1.875rem;
            }

            .cat-hero-desc {
                font-size: 0.9375rem;
            }

            .cat-hero-actions {
                flex-direction: column;
            }

            .cat-hero-actions .btn-brand,
            .cat-hero-actions .btn-outline {
                width: 100%;
            }

            .data-grid,
            .process-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .data-item {
                padding: 24px 16px;
            }

            .data-item .data-num {
                font-size: 2rem;
            }

            .scene-block {
                gap: 24px;
            }

            .scene-content h3 {
                font-size: 1.25rem;
            }

            .scene-content p {
                font-size: 0.9375rem;
            }

            .scene-num {
                width: 38px;
                height: 38px;
                font-size: 1rem;
                margin-bottom: 14px;
            }

            .process-card {
                padding: 24px 20px;
            }

            .cta-strip {
                flex-direction: column;
                align-items: flex-start;
                gap: 20px;
                padding: 24px;
            }

            .cta-strip .btn-brand {
                width: 100%;
            }

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

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .footer-links {
                justify-content: center;
            }
        }

        @media (max-width: 575.98px) {
            body {
                font-size: 1rem;
            }

            .section-head h2 {
                font-size: 1.5rem;
            }

            .section-overline {
                font-size: 0.75rem;
            }

            .logo-text {
                font-size: 1.125rem;
            }

            .logo-mark {
                width: 34px;
                height: 34px;
                font-size: 1.125rem;
            }
        }

/* roulang page: article */
:root {
  --bg-deep: #0B1026;
  --bg-dark: #070B1A;
  --bg-panel: #101836;
  --bg-panel-2: #1A2550;
  --primary: #00D4FF;
  --primary-dark: #00B8E0;
  --accent: #FFB020;
  --accent-dark: #E59A15;
  --success: #10E57C;
  --danger: #FF5D6C;
  --text-bright: #F5F8FF;
  --text-light: #CDD4EA;
  --text-body: #A0AAC8;
  --text-muted: #6B7394;
  --text-dim: #4A5170;
  --glass-bg: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.08);
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-input: 12px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.35);
  --shadow-hover: 0 16px 48px rgba(0,212,255,0.12);
  --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, sans-serif;
  --font-num: "Inter", "SF Pro Display", "PingFang SC", sans-serif;
  --header-h: 72px;
  --tabbar-h: 64px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-cn);
  background-color: var(--bg-deep);
  color: var(--text-body);
  line-height: 1.7;
  font-size: 1rem;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

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

ul,
ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

button,
input,
select,
textarea {
  font-family: inherit;
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

::selection {
  background: rgba(0, 212, 255, 0.3);
  color: #fff;
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-deep);
}

::-webkit-scrollbar-thumb {
  background: #2A3460;
  border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
  background: #3A4678;
}

.container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

@media (max-width: 767.98px) {
  .container {
    padding: 0 16px;
  }
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1040;
  height: var(--header-h);
  background: rgba(11, 16, 38, 0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: background .3s ease, border-color .3s ease, box-shadow .3s ease;
}

.site-header.scrolled {
  background: rgba(11, 16, 38, 0.88);
  border-bottom-color: rgba(255, 255, 255, 0.06);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 24px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-bright);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: opacity .2s ease;
}

.logo:hover {
  opacity: 0.85;
  color: var(--text-bright);
}

.logo-mark {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #00D4FF, #00A8E0);
  color: #0B1026;
  font-weight: 800;
  font-size: 1.15rem;
  border-radius: 10px;
  box-shadow: 0 0 18px rgba(0, 212, 255, 0.4);
}

.logo-text {
  font-family: var(--font-num);
}

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

.main-nav a {
  position: relative;
  display: block;
  padding: 10px 18px;
  color: var(--text-light);
  font-size: 0.9375rem;
  border-radius: 8px;
  transition: color .2s ease, background .2s ease;
}

.main-nav a:hover {
  color: var(--text-bright);
  background: rgba(255, 255, 255, 0.04);
}

.main-nav a.active {
  color: #fff;
  font-weight: 600;
}

.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.5);
}

.nav-cta {
  display: flex;
  align-items: center;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  cursor: pointer;
  transition: border-color .2s ease, background .2s ease;
}

.nav-toggle:hover {
  border-color: rgba(0, 212, 255, 0.5);
  background: rgba(255, 255, 255, 0.06);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-bright);
  border-radius: 2px;
  transition: transform .3s ease, opacity .3s ease;
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu {
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1030;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: rgba(11, 16, 38, 0.93);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  opacity: 0;
  visibility: hidden;
  transition: opacity .35s ease, visibility .35s ease;
}

.mobile-menu.open {
  opacity: 1;
  visibility: visible;
}

.mobile-menu a {
  font-size: 1.4rem;
  color: var(--text-light);
  padding: 14px 28px;
  border-radius: 12px;
  transition: color .2s ease, background .2s ease;
}

.mobile-menu a:hover {
  color: var(--primary);
  background: rgba(0, 212, 255, 0.06);
}

.mobile-menu a.active {
  color: var(--primary);
  font-weight: 600;
}

.btn-brand,
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-btn);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease, color .25s ease;
}

.btn-brand {
  background: linear-gradient(135deg, #00D4FF, #00A8E0);
  color: #0B1026;
  box-shadow: 0 0 24px rgba(0, 212, 255, 0.3);
}

.btn-brand:hover {
  background: linear-gradient(135deg, #00B8E0, #0096D0);
  color: #0B1026;
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(0, 212, 255, 0.55);
}

.btn-brand:active {
  transform: scale(0.98);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.35);
}

.btn-outline {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.25);
  color: #fff;
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 212, 255, 0.12);
}

.btn-outline:active {
  transform: scale(0.98);
}

.page-hero {
  position: relative;
  min-height: 42vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + 32px) 0 56px;
  background-color: var(--bg-deep);
  overflow: hidden;
}

.page-hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.35;
}

.page-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 16, 38, 0.72) 0%, rgba(11, 16, 38, 0.88) 55%, var(--bg-deep) 100%);
}

.page-hero-content {
  position: relative;
  z-index: 2;
  max-width: 920px;
  margin: 0 auto;
  text-align: center;
  width: 100%;
}

.breadcrumb-custom {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.breadcrumb-custom a {
  color: var(--text-muted);
  transition: color .2s ease;
}

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

.breadcrumb-custom .sep {
  color: var(--text-dim);
}

.breadcrumb-custom .current {
  color: var(--text-bright);
  max-width: 420px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.article-hero-title {
  font-size: clamp(1.75rem, 3.6vw, 3rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-bright);
  letter-spacing: 0.01em;
  margin-bottom: 20px;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px 20px;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.badge-cat {
  display: inline-flex;
  align-items: center;
  padding: 5px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-bright);
  font-size: 0.8125rem;
  transition: border-color .2s ease, color .2s ease;
}

.badge-cat:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.meta-item i {
  color: var(--primary);
  font-size: 0.9rem;
}

.article-cover-wrap {
  margin-top: 56px;
}

.article-cover {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
}

.article-body {
  max-width: 780px;
  margin: 0 auto;
  padding: 56px 24px 0;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--text-body);
  letter-spacing: 0.01em;
}

.article-body p {
  margin: 1.25em 0;
}

.article-body h2 {
  font-size: clamp(1.375rem, 2.2vw, 1.625rem);
  font-weight: 600;
  color: var(--text-bright);
  line-height: 1.4;
  margin: 2.2em 0 0.8em;
  padding-left: 14px;
  border-left: 3px solid var(--primary);
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-bright);
  margin: 1.8em 0 0.6em;
}

.article-body h4 {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-light);
  margin: 1.6em 0 0.5em;
}

.article-body ul,
.article-body ol {
  margin: 1.2em 0;
  padding-left: 1.5em;
}

.article-body ul li {
  list-style: disc;
}

.article-body ol li {
  list-style: decimal;
}

.article-body li {
  margin: 0.45em 0;
}

.article-body img {
  border-radius: 16px;
  margin: 1.8em 0;
  height: auto;
}

.article-body a {
  color: var(--primary);
  text-decoration: underline dashed 1px;
  text-underline-offset: 4px;
  transition: color .2s ease;
}

.article-body a:hover {
  color: var(--primary-dark);
  text-decoration-style: solid;
}

.article-body blockquote {
  position: relative;
  margin: 1.8em 0;
  padding: 18px 24px;
  background: rgba(255, 255, 255, 0.04);
  border-left: 3px solid var(--primary);
  border-radius: 0 12px 12px 0;
  color: var(--text-light);
}

.article-body blockquote p:first-child {
  margin-top: 0;
}

.article-body blockquote p:last-child {
  margin-bottom: 0;
}

.article-body code {
  background: rgba(0, 0, 0, 0.3);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.9em;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  color: #7de7ff;
}

.article-body pre {
  background: rgba(0, 0, 0, 0.32);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 20px;
  overflow-x: auto;
  margin: 1.8em 0;
}

.article-body pre code {
  background: transparent;
  padding: 0;
  font-size: 0.875rem;
  line-height: 1.7;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.8em 0;
  font-size: 0.9375rem;
}

.article-body th,
.article-body td {
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 10px 14px;
  text-align: left;
}

.article-body th {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-bright);
  font-weight: 600;
}

.article-empty {
  text-align: center;
  padding: 60px 24px 70px;
}

.empty-icon {
  width: 84px;
  height: 84px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.4rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
}

.article-empty h2 {
  font-size: 1.5rem;
  color: var(--text-bright);
  margin-bottom: 12px;
}

.article-empty p {
  color: var(--text-muted);
  margin-bottom: 28px;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.article-tags {
  max-width: 780px;
  margin: 40px auto 0;
  padding: 28px 24px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: flex-start;
  gap: 16px;
  flex-wrap: wrap;
}

.tags-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 0.875rem;
  padding-top: 8px;
}

.tags-label i {
  color: var(--primary);
}

.tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-chip {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-light);
  font-size: 0.8125rem;
  transition: border-color .2s ease, color .2s ease, background .2s ease;
}

.tag-chip:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(0, 212, 255, 0.06);
}

.related-section {
  padding: 72px 0 32px;
  margin-top: 56px;
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 32px;
  gap: 16px;
}

.section-head h2 {
  font-size: clamp(1.5rem, 2.4vw, 2rem);
  color: var(--text-bright);
  font-weight: 600;
  margin: 0;
}

.section-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 0.875rem;
  transition: color .2s ease;
}

.section-more:hover {
  color: var(--primary);
}

.related-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}

.related-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 212, 255, 0.3);
  box-shadow: var(--shadow-hover);
}

.related-thumb {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-panel);
}

.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}

.related-card:hover .related-thumb img {
  transform: scale(1.04);
}

.related-info {
  padding: 20px 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.related-info h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-bright);
  line-height: 1.5;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color .2s ease;
}

.related-card:hover .related-info h3 {
  color: var(--primary);
}

.related-date {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: auto;
}

.related-date i {
  font-size: 0.875rem;
}

.article-action-bar {
  max-width: 780px;
  margin: 40px auto 0;
  padding: 0 24px;
}

.cta-strip {
  padding: 72px 0;
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  background: rgba(0, 212, 255, 0.06);
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: 16px;
  padding: 32px 36px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

.cta-copy h2 {
  font-size: clamp(1.25rem, 2vw, 1.625rem);
  color: var(--text-bright);
  font-weight: 600;
  margin-bottom: 8px;
}

.cta-copy p {
  color: var(--text-body);
  font-size: 0.9375rem;
  margin: 0;
}

.site-footer {
  background: var(--bg-dark);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand .logo {
  margin-bottom: 18px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin: 16px 0 0;
  max-width: 380px;
}

.footer-col h4 {
  color: var(--text-bright);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 18px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  color: var(--text-muted);
  font-size: 0.9375rem;
  transition: color .2s ease, padding-left .2s ease;
}

.footer-col a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
  font-size: 0.9375rem;
  margin-bottom: 12px;
}

.footer-contact-item i {
  color: var(--primary);
  font-size: 1rem;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 22px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-bottom p {
  color: var(--text-dim);
  font-size: 0.875rem;
  margin: 0;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: var(--text-dim);
  font-size: 0.875rem;
  transition: color .2s ease;
}

.footer-links a:hover {
  color: var(--primary);
}

.mobile-tabs {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1050;
  background: rgba(11, 16, 38, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-bottom: env(safe-area-inset-bottom);
}

.mobile-tabs-inner {
  display: flex;
  height: var(--tabbar-h);
  max-width: 520px;
  margin: 0 auto;
}

.mobile-tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.75rem;
  transition: color .2s ease, background .2s ease;
}

.mobile-tab i {
  font-size: 1.25rem;
  line-height: 1;
}

.mobile-tab.active {
  color: var(--primary);
  background: rgba(0, 212, 255, 0.12);
}

.mobile-tab:hover {
  color: var(--text-bright);
}

.mobile-tab:active {
  transform: scale(0.96);
}

@media (max-width: 991.98px) {
  .main-nav,
  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .mobile-tabs {
    display: block;
  }

  body {
    padding-bottom: calc(84px + env(safe-area-inset-bottom));
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .page-hero {
    min-height: 36vh;
    padding: calc(var(--header-h) + 20px) 0 48px;
  }
}

@media (max-width: 767.98px) {
  .article-body {
    padding: 40px 16px 0;
    font-size: 1rem;
  }

  .article-tags {
    padding: 24px 16px 0;
  }

  .article-action-bar {
    padding: 0 16px;
  }

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .cta-inner {
    flex-direction: column;
    text-align: center;
    padding: 28px 22px;
  }

  .article-hero-title {
    font-size: 1.65rem;
  }

  .breadcrumb-custom {
    font-size: 0.8125rem;
  }

  .related-section {
    padding-top: 56px;
    margin-top: 48px;
  }

  .cta-strip {
    padding: 56px 0;
  }
}

@media (max-width: 575.98px) {
  .btn-brand,
  .btn-outline {
    width: 100%;
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .article-meta {
    gap: 10px 14px;
  }
}