/* roulang page: index */
:root{
  --c-darkest:#121812;--c-dark:#161D16;--c-panel:#1C241C;--c-card:#222C22;
  --c-sand:#C9B896;--c-brass:#B08D57;--c-signal:#D8603A;--c-ink:#EDE6D8;--c-sub:#A8A291;
  --c-border:rgba(255,255,255,.08);--radius-lg:12px;--radius-md:8px;--radius-pill:999px;
  --font-cn:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-num:'Rajdhani','Barlow Condensed',var(--font-cn);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-cn);background:var(--c-darkest);color:var(--c-ink);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
button{cursor:pointer;font-family:inherit}
h1,h2,h3,h4{line-height:1.3;font-weight:700}
.container-x{max-width:1200px;margin:0 auto;padding-left:1rem;padding-right:1rem}
@media(min-width:640px){.container-x{padding-left:1.5rem;padding-right:1.5rem}}
@media(min-width:1024px){.container-x{padding-left:2rem;padding-right:2rem}}
.section-tag{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-num);font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--c-brass);border:1px solid rgba(176,141,87,.35);padding:4px 14px;border-radius:var(--radius-pill);background:rgba(176,141,87,.06);font-weight:600}
.section-tag::before{content:'';width:6px;height:6px;background:var(--c-signal);border-radius:1px;transform:rotate(45deg)}
.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--c-sand);color:#1A2416;font-weight:700;font-size:.95rem;padding:12px 28px;border-radius:var(--radius-pill);border:2px solid var(--c-sand);transition:all .25s ease;letter-spacing:.02em}
.btn-primary:hover{background:var(--c-brass);border-color:var(--c-brass);transform:translateY(-2px);box-shadow:0 8px 24px rgba(176,141,87,.28)}
.btn-primary:focus-visible{outline:2px solid var(--c-brass);outline-offset:3px}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-outline{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:transparent;color:var(--c-ink);font-weight:600;font-size:.95rem;padding:12px 28px;border-radius:var(--radius-pill);border:1.5px solid rgba(255,255,255,.25);transition:all .25s ease}
.btn-outline:hover{border-color:var(--c-sand);color:var(--c-sand);background:rgba(201,184,150,.06);transform:translateY(-2px)}
.btn-outline:focus-visible{outline:2px solid var(--c-brass);outline-offset:3px}
.btn-outline:active{transform:translateY(0)}
.badge{display:inline-flex;align-items:center;gap:6px;font-size:.75rem;font-weight:600;padding:4px 12px;border-radius:var(--radius-pill);letter-spacing:.03em}
.badge-signal{background:rgba(216,96,58,.14);color:#E88562;border:1px solid rgba(216,96,58,.35)}
.badge-sand{background:rgba(201,184,150,.12);color:var(--c-sand);border:1px solid rgba(201,184,150,.3)}
.badge-brass{background:rgba(176,141,87,.12);color:var(--c-brass);border:1px solid rgba(176,141,87,.3)}
.card-tactical{background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--radius-lg);transition:border-color .25s ease,transform .25s ease,box-shadow .25s ease}
.card-tactical:hover{border-color:rgba(176,141,87,.45);transform:translateY(-2px);box-shadow:0 12px 30px rgba(0,0,0,.35)}
/* nav */
.site-nav{position:fixed;top:14px;left:0;right:0;z-index:100;padding:0 16px;pointer-events:none}
.site-nav-inner{pointer-events:auto;max-width:1080px;margin:0 auto;background:rgba(26,46,26,.72);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-pill);padding:10px 18px;display:flex;align-items:center;gap:16px;transition:background .3s ease;box-shadow:0 8px 32px rgba(0,0,0,.35)}
.site-nav.scrolled{background:rgba(18,24,18,.92)}
.nav-logo{font-weight:800;font-size:.98rem;color:var(--c-ink);white-space:nowrap;display:flex;align-items:center;gap:8px}
.nav-logo .dot{width:8px;height:8px;background:var(--c-signal);border-radius:2px;transform:rotate(45deg);flex-shrink:0}
.nav-links{display:flex;align-items:center;gap:4px;overflow-x:auto;scrollbar-width:none;flex-shrink:0}
.nav-links::-webkit-scrollbar{display:none}
.nav-links a{font-size:.85rem;font-weight:500;color:rgba(237,230,216,.75);padding:6px 14px;border-radius:20px;white-space:nowrap;transition:color .2s,background .2s;position:relative}
.nav-links a:hover{color:var(--c-sand);background:rgba(201,184,150,.08)}
.nav-links a.active{color:var(--c-sand);background:rgba(201,184,150,.1)}
.nav-cta{margin-left:auto;display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-cta a.btn-primary{padding:8px 20px;font-size:.85rem}
/* Hero */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;padding:140px 0 80px;background:linear-gradient(180deg,#121812 0%,#161D16 60%,#1C241C 100%);overflow:hidden}
.hero::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;opacity:.12;z-index:0}
.hero::after{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(ellipse at 70% 40%,rgba(176,141,87,.10) 0%,transparent 60%),linear-gradient(180deg,rgba(18,24,18,.88) 0%,rgba(22,29,22,.94) 100%);z-index:1}
.hero-content{position:relative;z-index:2}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:24px}
.hero-title{font-size:clamp(2.2rem,5vw,3.8rem);font-weight:800;line-height:1.18;letter-spacing:-.01em;margin-bottom:20px;max-width:840px}
.hero-title .underline{position:relative;color:var(--c-sand)}
.hero-title .underline::after{content:'';position:absolute;left:0;right:0;bottom:2px;height:6px;background:rgba(176,141,87,.35);border-radius:3px;z-index:-1}
.hero-sub{font-size:1.05rem;color:var(--c-sub);max-width:640px;line-height:1.8;margin-bottom:32px}
.hero-sub strong{color:var(--c-ink);font-weight:600}
.hero-ctas{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:36px}
.hero-stats{display:flex;flex-wrap:wrap;gap:24px;border-top:1px solid var(--c-border);padding-top:24px;max-width:640px}
.hero-stat{display:flex;flex-direction:column}
.hero-stat b{font-family:var(--font-num);font-size:1.6rem;font-weight:700;color:var(--c-sand);line-height:1.1}
.hero-stat span{font-size:.78rem;color:var(--c-sub);margin-top:2px}
/* icon matrix */
.icon-matrix{position:absolute;right:3%;top:50%;transform:translateY(-50%);z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:14px;width:260px;pointer-events:none}
.icon-matrix .cell{background:rgba(34,44,34,.7);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-md);padding:16px 14px;display:flex;flex-direction:column;gap:6px;align-items:center;justify-content:center;text-align:center}
.icon-matrix .cell svg{width:28px;height:28px;stroke:var(--c-sand)}
.icon-matrix .cell b{font-size:.78rem;font-weight:600;color:var(--c-ink);line-height:1.3}
.icon-matrix .cell span{font-family:var(--font-num);font-size:.65rem;color:var(--c-sub);letter-spacing:.08em}
/* panel */
.panel{background:var(--c-panel);border-top:1px solid rgba(255,255,255,.05);border-bottom:1px solid rgba(255,255,255,.05)}
.panel-solid{background:var(--c-dark)}
.metric-card{background:var(--c-card);border:1px solid var(--c-border);border-left:3px solid var(--c-brass);border-radius:var(--radius-md);padding:22px 20px;position:relative;overflow:hidden;transition:border-color .25s,transform .25s}
.metric-card:hover{border-color:rgba(176,141,87,.5);transform:translateY(-3px)}
.metric-card b{font-family:var(--font-num);font-size:clamp(1.8rem,3.5vw,2.6rem);display:block;color:var(--c-sand);line-height:1.1;font-weight:700}
.metric-card span{font-size:.85rem;color:var(--c-sub);display:block;margin-top:6px}
.metric-card .label-top{font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--c-brass);font-family:var(--font-num);margin-bottom:6px}
/* service cards */
.service-wrap{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.service-card{border-radius:var(--radius-lg);padding:30px 26px;background:var(--c-card);border:1px solid var(--c-border);transition:all .28s ease;display:flex;flex-direction:column}
.service-card:hover{border-color:rgba(176,141,87,.5);transform:translateY(-3px);box-shadow:0 16px 40px rgba(0,0,0,.35)}
.service-card.feature{background:linear-gradient(145deg,#222C22,#1F2D1F);border:1px solid rgba(176,141,87,.4);grid-row:span 2;justify-content:space-between;padding:34px 30px}
.service-icon{width:46px;height:46px;border-radius:10px;display:flex;align-items:center;justify-content:center;background:rgba(201,184,150,.1);border:1px solid rgba(201,184,150,.25);margin-bottom:16px}
.service-icon svg{width:22px;height:22px;stroke:var(--c-sand)}
.service-card h3{font-size:1.15rem;margin-bottom:8px;font-weight:600}
.service-card p{font-size:.9rem;color:var(--c-sub);line-height:1.7;margin-bottom:14px;flex-grow:1}
.service-tags{display:flex;flex-wrap:wrap;gap:8px}
.service-tags .st{font-size:.72rem;padding:3px 10px;border-radius:20px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);color:var(--c-sub);font-weight:500}
/* compare */
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.compare-card{border-radius:var(--radius-lg);padding:28px 24px;background:var(--c-card);border:1px solid var(--c-border)}
.compare-card.good{background:linear-gradient(145deg,#1E2A1E,#222C22);border:1px solid rgba(176,141,87,.45);position:relative}
.compare-card.good::before{content:'推荐';position:absolute;top:-1px;right:22px;background:var(--c-signal);color:#fff;font-size:.7rem;font-weight:700;padding:5px 14px;border-radius:0 0 10px 10px;letter-spacing:.08em}
.compare-card h3{font-size:1.05rem;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.compare-card h3 .ic{width:8px;height:8px;border-radius:50%;display:inline-block}
.compare-card.bad h3 .ic{background:#D8603A}
.compare-card.good h3 .ic{background:var(--c-sand)}
.compare-list{list-style:none;display:flex;flex-direction:column;gap:12px}
.compare-list li{display:flex;align-items:flex-start;gap:10px;font-size:.88rem;color:var(--c-sub);line-height:1.65}
.compare-list li b{color:var(--c-ink);font-weight:600}
.compare-list li .mark{flex-shrink:0;width:20px;height:20px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin-top:2px}
.compare-list li .mark svg{width:11px;height:11px}
.compare-list li .mark.bad{background:rgba(216,96,58,.15);stroke:#E88562}
.compare-list li .mark.good{background:rgba(201,184,150,.18);stroke:var(--c-sand)}
/* quote bubbles */
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.quote-card{background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--radius-lg);padding:22px 20px;position:relative}
.quote-card::after{content:'';position:absolute;bottom:-8px;left:26px;width:0;height:0;border-left:10px solid transparent;border-right:10px solid transparent;border-top:10px solid var(--c-card)}
.quote-card p{font-size:.84rem;color:var(--c-sub);line-height:1.7;margin-bottom:12px}
.quote-card .q-user{display:flex;align-items:center;gap:10px}
.quote-card .avatar{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,rgba(176,141,87,.4),rgba(201,184,150,.2));flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:.7rem;font-weight:700;color:var(--c-sand);border:1px solid rgba(201,184,150,.3)}
.quote-card .q-user .nm{font-size:.8rem;font-weight:600;color:var(--c-ink)}
.quote-card .q-user .tag{font-size:.68rem;color:var(--c-sub)}
/* faq */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{border:1px solid var(--c-border);border-radius:var(--radius-md);margin-bottom:14px;background:var(--c-panel);overflow:hidden;transition:border-color .2s}
.faq-item.open{border-color:rgba(176,141,87,.4);background:var(--c-card)}
.faq-q{display:flex;align-items:center;gap:14px;padding:18px 20px;cursor:pointer;font-weight:600;font-size:.95rem;color:var(--c-ink)}
.faq-q .plus{flex-shrink:0;width:22px;height:22px;border-radius:50%;border:1.5px solid rgba(176,141,87,.5);display:flex;align-items:center;justify-content:center;font-size:.9rem;color:var(--c-brass);transition:transform .2s ease;line-height:1}
.faq-item.open .faq-q .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 20px;font-size:.88rem;color:var(--c-sub);line-height:1.75}
.faq-item.open .faq-a{max-height:300px;padding-bottom:18px}
/* form */
.form-card{background:var(--c-card);border:1px solid rgba(176,141,87,.25);border-radius:var(--radius-lg);padding:32px 30px;position:relative;overflow:hidden}
.form-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--c-signal),var(--c-brass),transparent)}
.form-card .form-corner{position:absolute;top:14px;right:14px;display:flex;align-items:center;gap:6px;font-size:.68rem;color:var(--c-signal);font-family:var(--font-num);letter-spacing:.12em}
.form-card .form-corner .pulse{width:8px;height:8px;border-radius:50%;background:var(--c-signal);box-shadow:0 0 0 3px rgba(216,96,58,.2);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 3px rgba(216,96,58,.2)}50%{box-shadow:0 0 0 6px rgba(216,96,58,.08)}}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:.82rem;font-weight:600;color:var(--c-sand);margin-bottom:6px}
.form-control{width:100%;background:var(--c-panel);border:1.5px solid rgba(255,255,255,.1);border-radius:var(--radius-md);padding:12px 16px;font-size:.9rem;color:var(--c-ink);font-family:inherit;transition:border-color .2s,box-shadow .2s}
.form-control:focus{outline:none;border-color:var(--c-brass);box-shadow:0 0 0 3px rgba(176,141,87,.15)}
.form-control::placeholder{color:rgba(168,162,145,.5)}
select.form-control{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none' stroke='%23B08D57' stroke-width='2'%3E%3Cpath d='M1 1l5 5 5-5'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 16px center}
textarea.form-control{resize:vertical;min-height:80px}
/* footer */
.site-footer{background:#0E130E;border-top:1px solid rgba(255,255,255,.06);padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1.2fr;gap:40px;padding-bottom:40px}
.footer-brand .logo{font-weight:800;font-size:1.05rem;color:var(--c-ink);margin-bottom:12px;display:flex;align-items:center;gap:8px}
.footer-brand p{font-size:.85rem;color:var(--c-sub);line-height:1.7;max-width:280px}
.footer-col h4{font-size:.82rem;font-weight:700;color:var(--c-sand);margin-bottom:16px;letter-spacing:.08em}
.footer-col ul{list-style:none}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{font-size:.85rem;color:var(--c-sub);transition:color .2s}
.footer-col ul a:hover{color:var(--c-sand)}
.footer-contact li{font-size:.85rem;color:var(--c-sub);display:flex;gap:8px;align-items:baseline}
.footer-bottom{border-top:1px solid rgba(255,255,255,.05);padding:18px 0;font-size:.78rem;color:rgba(168,162,145,.6);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between}
/* section spacing */
.section{padding:72px 0}
@media(min-width:768px){.section{padding:96px 0}}
.section-head{margin-bottom:44px;max-width:720px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head h2{font-size:clamp(1.6rem,3vw,2.3rem);margin-top:14px;line-height:1.3}
.section-head p{color:var(--c-sub);font-size:.95rem;margin-top:14px;line-height:1.75}
/* responsive */
@media(max-width:1024px){.icon-matrix{display:none}.hero{padding-top:120px}.service-wrap{grid-template-columns:1fr 1fr}.quote-grid{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:768px){.nav-links{display:none}.nav-cta a.btn-primary{padding:7px 14px;font-size:.78rem}.hero-title{font-size:clamp(1.7rem,4vw,2.4rem)}.hero{padding-top:110px}.compare-grid{grid-template-columns:1fr}.service-wrap{grid-template-columns:1fr}.quote-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr;gap:28px}.metric-card{padding:16px}}
@media(max-width:520px){.hero-stats{gap:14px}.hero-stat b{font-size:1.2rem}.hero-sub{font-size:.92rem}.section-tag{font-size:.7rem}}
@media(min-width:768px) and (max-width:1024px){.hero-title{max-width:70%}}