:root{--green:#10b981;--green-dark:#059669;--green-deep:#064e3b;--green-bg:#053b2c;--cyan:#2dd4bf;--ink:#0c1f18;--muted:#5b6b64;--line:#e3ece7;--bg:#f4faf7;--card:#fff;--gold:#f59e0b;--red:#ef4444;--shadow:0 10px 40px rgba(6,78,59,.10);--radius:18px}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{max-width:1180px;margin:0 auto;padding:0 22px}
.btn{display:inline-block;padding:13px 30px;border-radius:50px;font-weight:600;font-size:16px;transition:.25s;border:none;cursor:pointer;text-align:center}
.btn-green{background:var(--green);color:#fff;box-shadow:0 8px 22px rgba(16,185,129,.35)}
.btn-green:hover{background:var(--green-dark);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--green-dark);border:1.5px solid var(--green)}
.btn-ghost:hover{background:var(--green);color:#fff}
.btn-lg{padding:16px 40px;font-size:18px}
.btn-block{display:block;width:100%}
.badge{display:inline-block;padding:5px 14px;border-radius:30px;background:#d1fae5;color:var(--green-dark);font-size:13px;font-weight:600}
/* nav */
.nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.9);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700;color:var(--green-deep)}
.logo img{width:34px;height:34px;border-radius:8px}
.nav-links{display:flex;gap:28px;align-items:center;font-size:15px;font-weight:500}
.nav-links a{color:#33463f;transition:.2s}
.nav-links a:hover{color:var(--green-dark)}
.nav-links .active{color:var(--green-dark);font-weight:700}
.nav-cta{display:flex;align-items:center;gap:12px}
/* hero */
.hero{background:linear-gradient(135deg,#053b2c 0%,#0a5c43 55%,#0d7a57 100%);color:#fff;padding:70px 0 90px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 80% 20%,rgba(45,212,191,.18),transparent 60%),radial-gradient(500px 300px at 10% 90%,rgba(16,185,129,.25),transparent 55%)}
.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero h1{font-size:46px;line-height:1.22;font-weight:800;margin:18px 0;letter-spacing:-.5px}
.hero h1 .accent{color:var(--cyan)}
.hero p.sub{font-size:18px;color:#c9e9dc;max-width:520px;margin-bottom:28px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px}
.hero-tags span{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.18);padding:6px 14px;border-radius:30px;font-size:13px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-stat{display:flex;gap:34px;margin-top:34px;flex-wrap:wrap}
.hero-stat .num{font-size:28px;font-weight:800;color:#fff}
.hero-stat .lbl{font-size:13px;color:#b7e0d2}
/* client simulator */
.sim{background:#fff;border-radius:20px;box-shadow:0 30px 70px rgba(0,0,0,.35);overflow:hidden;border:1px solid rgba(255,255,255,.2)}
.sim-bar{display:flex;align-items:center;gap:8px;padding:12px 16px;background:#0f2f24;border-bottom:1px solid rgba(255,255,255,.08)}
.sim-dot{width:12px;height:12px;border-radius:50%}
.sim-dot.r{background:#ff5f57}.sim-dot.y{background:#febc2e}.sim-dot.g{background:#28c840}
.sim-title{margin-left:8px;color:#c9e9dc;font-size:13px;font-weight:600;display:flex;align-items:center;gap:6px}
.sim-title img{width:16px;height:16px;border-radius:4px}
.sim-body{padding:26px;color:var(--ink)}
.sim-power{display:flex;flex-direction:column;align-items:center;justify-content:center;height:170px}
.power-btn{width:96px;height:96px;border-radius:50%;background:linear-gradient(145deg,#10b981,#059669);display:flex;align-items:center;justify-content:center;box-shadow:0 14px 34px rgba(16,185,129,.5),inset 0 2px 6px rgba(255,255,255,.3);position:relative}
.power-btn::after{content:"";position:absolute;inset:-8px;border-radius:50%;border:2px dashed rgba(16,185,129,.5);animation:spin 10s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.power-btn svg{width:44px;height:44px;fill:#fff}
.sim-status{margin-top:14px;font-weight:700;color:var(--green-dark);font-size:15px}
.sim-status span{display:inline-block;width:9px;height:9px;background:var(--green);border-radius:50%;margin-right:6px;animation:pulse 1.4s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}
.sim-row{display:flex;justify-content:space-between;align-items:center;padding:12px 14px;background:#f4faf7;border-radius:12px;margin-bottom:10px;font-size:14px}
.sim-row .k{color:var(--muted)}
.sim-row .v{font-weight:700;color:var(--green-deep);display:flex;align-items:center;gap:6px}
.sim-speed{display:flex;gap:10px;margin-top:12px}
.sim-speed .box{flex:1;text-align:center;padding:12px;background:#f4faf7;border-radius:12px}
.sim-speed .box b{display:block;font-size:18px;color:var(--green-deep)}
.sim-speed .box i{font-style:normal;font-size:12px;color:var(--muted)}
.sim-nodes{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}
.sim-nodes span{font-size:12px;padding:5px 12px;border-radius:20px;background:#ecfdf5;color:var(--green-dark);border:1px solid #d1fae5}
.sim-nodes span.on{background:var(--green);color:#fff;border-color:var(--green)}
/* section */
.sec{padding:72px 0}
.sec-head{text-align:center;max-width:720px;margin:0 auto 48px}
.sec-head .badge{margin-bottom:14px}
.sec-head h2{font-size:34px;font-weight:800;letter-spacing:-.5px;color:var(--ink)}
.sec-head h2 .accent{color:var(--green-dark)}
.sec-head p{color:var(--muted);margin-top:12px;font-size:16px}
/* notice */
.notice{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 24px;display:flex;gap:14px;align-items:flex-start;box-shadow:var(--shadow)}
.notice .ic{flex:0 0 40px;height:40px;background:#fef3c7;border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--gold);font-size:20px}
.notice b{color:var(--ink)}
.notice p{color:var(--muted);font-size:14px}
/* feature grid */
.grid{display:grid;gap:24px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-6{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:.25s;box-shadow:var(--shadow)}
.card:hover{transform:translateY(-5px);box-shadow:0 16px 44px rgba(6,78,59,.16)}
.card .ico{width:56px;height:56px;border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:16px;background:#d1fae5;color:var(--green-dark)}
.card h3{font-size:19px;font-weight:700;margin-bottom:8px;color:var(--ink)}
.card p{color:var(--muted);font-size:14.5px}
/* compare table */
.cmp{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.cmp table{width:100%;border-collapse:collapse;font-size:14.5px}
.cmp th,.cmp td{padding:16px 18px;text-align:center;border-bottom:1px solid var(--line)}
.cmp th{background:#0f2f24;color:#fff;font-weight:600}
.cmp th.hl{background:var(--green-dark)}
.cmp td:first-child,.cmp th:first-child{text-align:left;font-weight:600;color:var(--ink)}
.cmp tr:last-child td{border-bottom:none}
.cmp .yes{color:var(--green-dark);font-weight:700}
.cmp .no{color:#b0bdb6}
/* tabs */
.tabs{display:flex;gap:8px;justify-content:center;margin-bottom:30px;flex-wrap:wrap}
.tabs input{display:none}
.tabs label{cursor:pointer;padding:10px 24px;border-radius:30px;font-weight:600;font-size:14.5px;background:#fff;border:1px solid var(--line);color:var(--muted);transition:.2s}
.tabs label:hover{color:var(--green-dark)}
#tab1:checked~.tabs label[for=tab1],#tab2:checked~.tabs label[for=tab2],#tab3:checked~.tabs label[for=tab3]{background:var(--green);color:#fff;border-color:var(--green)}
.tab-panel{display:none}
#tab1:checked~.tab-content .p1,#tab2:checked~.tab-content .p2,#tab3:checked~.tab-content .p3{display:grid}
/* news cards */
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.25s;display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-5px);box-shadow:0 16px 40px rgba(6,78,59,.15)}
.news-card .thumb{height:150px;overflow:hidden}
.news-card .thumb img{width:100%;height:100%;object-fit:cover}
.news-card .body{padding:18px;display:flex;flex-direction:column;gap:8px;flex:1}
.news-card .cat{font-size:12px;color:var(--green-dark);font-weight:600}
.news-card h4{font-size:16px;line-height:1.45;font-weight:700}
.news-card h4 a:hover{color:var(--green-dark)}
.news-card .meta{font-size:12.5px;color:var(--muted)}
/* reviews */
.review{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.review .stars{color:var(--gold);font-size:16px;margin-bottom:10px;letter-spacing:2px}
.review p{color:#33463f;font-size:14.5px}
.review .who{display:flex;align-items:center;gap:12px;margin-top:16px}
.review .avatar{width:44px;height:44px;border-radius:50%;background:#d1fae5;color:var(--green-dark);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:18px}
.review .who b{font-size:15px}
.review .who span{font-size:12.5px;color:var(--muted);display:block}
/* download */
.dl-grid{grid-template-columns:repeat(5,1fr)}
.dl-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 18px;text-align:center;transition:.25s;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:10px}
.dl-card:hover{transform:translateY(-5px);border-color:var(--green)}
.dl-card .os{width:52px;height:52px;margin:0 auto;border-radius:14px;background:#d1fae5;color:var(--green-dark);display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:800}
.dl-card h4{font-size:16px}
.dl-card .v{font-size:12.5px;color:var(--muted)}
/* trust */
.trust{background:var(--green-bg);color:#fff}
.trust .sec-head h2{color:#fff}
.trust .sec-head p{color:#a9d6c6}
.trust-grid{grid-template-columns:repeat(4,1fr)}
.trust-item{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);padding:24px;text-align:center}
.trust-item .n{font-size:30px;font-weight:800;color:var(--cyan)}
.trust-item .l{font-size:13.5px;color:#a9d6c6;margin-top:4px}
/* scene */
.scene{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.scene .ico{font-size:28px}
.scene h4{font-size:17px;margin:10px 0 6px}
.scene p{font-size:14px;color:var(--muted)}
/* faq */
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:14px;overflow:hidden}
.faq-item details summary{cursor:pointer;list-style:none;padding:20px 24px;font-weight:700;font-size:16.5px;display:flex;justify-content:space-between;align-items:center}
.faq-item details summary::-webkit-details-marker{display:none}
.faq-item details summary::after{content:"+";font-size:24px;color:var(--green-dark);font-weight:400}
.faq-item details[open] summary::after{content:"−"}
.faq-item .faq-body{padding:0 24px 22px;color:#3d4f48;font-size:15px}
.faq-item .step{margin-bottom:12px;padding-left:14px;border-left:3px solid #d1fae5}
.faq-item .step b{color:var(--green-dark)}
/* cta */
.cta{background:linear-gradient(135deg,#059669,#0d7a57);color:#fff;text-align:center;padding:70px 24px;border-radius:var(--radius)}
.cta h2{font-size:34px;font-weight:800;margin-bottom:12px}
.cta p{color:#d3f3e6;margin-bottom:28px;font-size:16px}
.cta .btn-ghost{border-color:#fff;color:#fff}
.cta .btn-ghost:hover{background:#fff;color:var(--green-dark)}
/* footer */
.footer{background:#07271c;color:#a9d6c6;padding:56px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;padding-bottom:36px}
.footer h5{color:#fff;font-size:15px;margin-bottom:16px}
.footer a{display:block;color:#a9d6c6;font-size:14px;margin-bottom:10px;transition:.2s}
.footer a:hover{color:#fff}
.footer .logo{color:#fff;margin-bottom:12px}
.footer .desc{font-size:14px;line-height:1.8;max-width:340px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;font-size:13px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.footer-bottom a{color:#a9d6c6}
.footer-bottom a:hover{color:#fff}
/* breadcrumb */
.breadcrumb{font-size:13.5px;color:var(--muted);padding:18px 0;display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.breadcrumb a{color:var(--green-dark)}
.breadcrumb a:hover{text-decoration:underline}
.breadcrumb span{color:#9aa8a1}
/* article page */
.article-wrap{display:grid;grid-template-columns:1fr 300px;gap:36px;padding:20px 0 60px}
.article-main{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:40px;box-shadow:var(--shadow)}
.article-main h1{font-size:30px;line-height:1.35;font-weight:800;margin:14px 0}
.article-meta{display:flex;gap:18px;color:var(--muted);font-size:13.5px;flex-wrap:wrap;margin-bottom:20px}
.article-meta b{color:var(--green-dark)}
.article-cover{margin:0 -40px 26px}
.article-cover img{width:100%;height:auto}
.article-toc{background:#f4faf7;border:1px solid #d7efe5;border-radius:14px;padding:18px 22px;margin:0 0 28px}
.article-toc h6{font-size:14px;color:var(--green-deep);margin-bottom:10px;text-transform:uppercase;letter-spacing:.5px}
.article-toc a{display:block;font-size:14px;color:#3d4f48;padding:4px 0;border-left:2px solid #d1fae5;padding-left:12px}
.article-toc a:hover{color:var(--green-dark);border-left-color:var(--green)}
.article-body p{margin-bottom:20px;font-size:16px;color:#2c3d36;line-height:1.9}
.article-body h2{font-size:23px;font-weight:800;margin:34px 0 16px;color:var(--ink);padding-left:14px;border-left:4px solid var(--green)}
.article-body img{margin:22px 0;border-radius:12px}
.article-body figure{margin:22px 0}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:8px}
.article-body blockquote{background:#f4faf7;border-left:4px solid var(--green);padding:16px 20px;margin:22px 0;border-radius:0 12px 12px 0;color:#3d4f48;font-size:15px}
.article-nav{display:flex;justify-content:space-between;gap:14px;margin-top:36px;padding-top:22px;border-top:1px solid var(--line)}
.article-nav a{flex:1;background:#f4faf7;border:1px solid #d7efe5;border-radius:12px;padding:14px 16px;font-size:14px;color:var(--ink);transition:.2s}
.article-nav a:hover{border-color:var(--green);color:var(--green-dark)}
.article-nav .dir{font-size:12px;color:var(--muted);display:block;margin-bottom:4px}
.article-nav .next{text-align:right}
/* sidebar */
.sidebar .widget{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;margin-bottom:22px;box-shadow:var(--shadow)}
.sidebar .widget h4{font-size:16px;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.sidebar .hot-item{display:flex;gap:10px;margin-bottom:14px;align-items:flex-start}
.sidebar .hot-item .n{flex:0 0 24px;height:24px;border-radius:6px;background:#d1fae5;color:var(--green-dark);font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center}
.sidebar .hot-item a{font-size:14px;line-height:1.5;color:#33463f}
.sidebar .hot-item a:hover{color:var(--green-dark)}
.sidebar .cat-item{display:block;font-size:14px;color:#33463f;padding:7px 0;border-bottom:1px dashed #e3ece7}
.sidebar .cat-item:hover{color:var(--green-dark)}
/* comments */
.comments{margin-top:36px;padding-top:26px;border-top:1px solid var(--line)}
.comments h3{font-size:19px;margin-bottom:20px}
.cmt{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid #eef4f1}
.cmt .avatar{flex:0 0 40px;height:40px;border-radius:50%;background:#d1fae5;color:var(--green-dark);display:flex;align-items:center;justify-content:center;font-weight:700}
.cmt .c-body b{font-size:14.5px;display:block}
.cmt .c-body .time{font-size:12px;color:var(--muted)}
.cmt .c-body p{font-size:14px;color:#33463f;margin-top:6px}
/* sitemap */
.sitemap-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;margin-bottom:20px;box-shadow:var(--shadow)}
.sitemap-card h3{font-size:18px;margin-bottom:14px;color:var(--green-deep);border-left:4px solid var(--green);padding-left:12px}
.sitemap-card a{display:block;font-size:15px;color:#33463f;padding:6px 0;border-bottom:1px dashed #e3ece7}
.sitemap-card a:hover{color:var(--green-dark)}
/* misc */
.sec-alt{background:#fff}
.center{text-align:center}
.mt0{margin-top:0}
.section-anchor{scroll-margin-top:90px}
@media(max-width:960px){.grid-3,.grid-6,.dl-grid,.trust-grid,.grid-5{grid-template-columns:repeat(2,1fr)}.hero-inner{grid-template-columns:1fr}.article-wrap{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.grid-3,.grid-6,.dl-grid,.trust-grid,.grid-5{grid-template-columns:1fr}.hero h1{font-size:32px}.article-main{padding:22px}.article-cover{margin:0 -22px 22px}}