/* Rufus 中文官网 - 深色科技风 */
:root{
  --bg:#0a0e17; --bg2:#0d1320; --card:#121a2b; --card2:#16203466;
  --line:#1e2a42; --line2:#26375a;
  --txt:#e6edf7; --muted:#94a6c0; --dim:#6b7d99;
  --cyan:#00d4ff; --blue:#2b7fff; --green:#2fd38b; --orange:#ffb02e;
  --grad:linear-gradient(135deg,#00d4ff 0%,#2b7fff 100%);
  --radius:14px; --shadow:0 10px 34px rgba(0,0,0,.45);
  --mono:Consolas,"Courier New",monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--bg);color:var(--txt);
  font-family:"Microsoft YaHei","PingFang SC","Noto Sans SC","Segoe UI",system-ui,sans-serif;
  font-size:16px;line-height:1.75;overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--cyan);text-decoration:none;transition:color .2s}
a:hover{color:#7ee7ff}
.container{width:min(1180px,92%);margin:0 auto}
h1,h2,h3,h4{line-height:1.35;font-weight:700}
h2{font-size:1.75rem;margin-bottom:.6em}
h3{font-size:1.2rem;margin-bottom:.5em}
p{margin-bottom:1em;color:#c6d2e4}
ul,ol{margin:0 0 1em 1.4em;color:#c6d2e4}
li{margin-bottom:.4em}
strong{color:var(--txt)}
code{font-family:var(--mono);background:#0c1424;border:1px solid var(--line);border-radius:6px;padding:.1em .45em;font-size:.9em;color:#8fd8ff}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:100;background:rgba(10,14,23,.82);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-size:1.18rem;font-weight:800;color:var(--txt);white-space:nowrap}
.logo:hover{color:var(--txt)}
.logo svg{flex:none}
.logo .ver{font-size:.68rem;font-weight:600;color:var(--cyan);background:#0e2a3a;border:1px solid #14435c;border-radius:20px;padding:1px 9px;margin-left:2px;letter-spacing:.5px}
.main-nav{display:flex;align-items:center;gap:2px}
.main-nav a{color:var(--muted);font-size:.94rem;padding:8px 13px;border-radius:8px;white-space:nowrap}
.main-nav a:hover{color:var(--txt);background:#16203a}
.main-nav a.active{color:var(--cyan);background:#0e2237}
.nav-toggle{display:none;background:none;border:1px solid var(--line2);border-radius:8px;color:var(--txt);font-size:1.2rem;padding:5px 12px;cursor:pointer}

/* ---------- hero ---------- */
.hero{position:relative;padding:84px 0 70px;overflow:hidden;border-bottom:1px solid var(--line)}
.hero::before,.hero::after{content:"";position:absolute;border-radius:50%;filter:blur(110px);opacity:.55;pointer-events:none}
.hero::before{width:560px;height:560px;left:-180px;top:-260px;background:#0e3a5c}
.hero::after{width:520px;height:520px;right:-160px;bottom:-260px;background:#15306b}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.1fr .9fr;gap:52px;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;font-size:.85rem;color:var(--cyan);background:#0e2a3a;border:1px solid #14435c;border-radius:30px;padding:5px 16px;margin-bottom:20px}
.hero h1{font-size:clamp(1.8rem,1.1rem + 2.8vw,2.7rem);line-height:1.25;margin-bottom:18px}
.hero h1 .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero .lead{font-size:1.1rem;color:var(--muted);margin-bottom:28px;max-width:34em}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px}
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 28px;border-radius:10px;font-weight:700;font-size:1rem;transition:transform .18s,box-shadow .18s}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--grad);color:#04121c;box-shadow:0 8px 26px rgba(0,150,220,.35)}
.btn-primary:hover{color:#04121c;box-shadow:0 12px 32px rgba(0,170,255,.45)}
.btn-ghost{border:1px solid var(--line2);color:var(--txt)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.hero-meta{display:flex;flex-wrap:wrap;gap:8px 20px;font-size:.88rem;color:var(--dim)}
.hero-meta span::before{content:"✔";color:var(--green);margin-right:6px}
.hero-shot{position:relative;max-width:640px;justify-self:end}
.hero-shot img{border-radius:16px;border:1px solid var(--line2);box-shadow:var(--shadow);width:100%}
.hero-shot::after{content:"";position:absolute;inset:-1px;border-radius:16px;box-shadow:inset 0 0 60px rgba(0,212,255,.06);pointer-events:none}

/* ---------- sections ---------- */
.section{padding:72px 0}
.section.alt{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{text-align:center;max-width:720px;margin:0 auto 46px}
.sec-head .kicker{display:block;font-size:.85rem;letter-spacing:3px;color:var(--cyan);text-transform:uppercase;margin-bottom:10px}
.sec-head p{color:var(--muted)}
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;transition:transform .2s,border-color .2s}
.card:hover{transform:translateY(-4px);border-color:#2c4a78}
.card .ico{width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:#0e2237;border:1px solid #1b3a5c;margin-bottom:16px}
.card h3{font-size:1.08rem}
.card p{font-size:.93rem;color:var(--muted);margin:0}

/* ---------- feature list ---------- */
.flist{display:grid;grid-template-columns:1fr 1fr;gap:14px 28px;margin:0;padding:0;list-style:none}
.flist li{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:14px 18px;margin:0;font-size:.95rem;color:#c6d2e4}
.flist li b{color:var(--txt);display:block;margin-bottom:2px}
.flist li::before{content:"";position:static}

/* ---------- steps ---------- */
.steps{counter-reset:s;display:grid;gap:20px}
.step{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px 24px 82px}
.step::before{counter-increment:s;content:counter(s);position:absolute;left:24px;top:24px;width:40px;height:40px;border-radius:50%;background:var(--grad);color:#04121c;font-weight:800;font-size:1.1rem;display:flex;align-items:center;justify-content:center}
.step h3{margin-bottom:6px}
.step p,.step ul{margin-bottom:0;font-size:.95rem;color:var(--muted)}
.step .tip{margin-top:10px;font-size:.88rem;color:var(--orange);background:#231a0a;border:1px solid #4a3512;border-radius:8px;padding:8px 14px}

/* ---------- tables ---------- */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius)}
table{width:100%;border-collapse:collapse;font-size:.95rem;min-width:640px}
th,td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line)}
th{background:#0f1727;color:var(--txt);font-weight:700;white-space:nowrap}
td{color:#c6d2e4}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover td{background:#131d31}
td a.dl{display:inline-flex;align-items:center;gap:6px;font-weight:700}

/* ---------- download cards ---------- */
.dl-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.dl-card{position:relative;background:var(--card);border:1px solid var(--line2);border-radius:var(--radius);padding:30px 28px;display:flex;flex-direction:column;transition:transform .2s,border-color .2s}
.dl-card:hover{transform:translateY(-4px);border-color:var(--cyan)}
.dl-card .tag{position:absolute;top:-12px;right:20px;font-size:.75rem;font-weight:700;color:#04121c;background:var(--cyan);border-radius:20px;padding:3px 14px}
.dl-card h3{font-size:1.22rem;margin-bottom:4px}
.dl-card .sub{font-size:.86rem;color:var(--dim);margin-bottom:18px}
.dl-card .spec{list-style:none;margin:0 0 22px;font-size:.9rem;color:var(--muted)}
.dl-card .spec li{margin-bottom:6px;padding-left:20px;position:relative}
.dl-card .spec li::before{content:"›";position:absolute;left:0;color:var(--cyan);font-weight:800}
.dl-card .btn{justify-content:center;margin-top:auto}
.note{background:#101b2e;border:1px solid #1d3550;border-left:4px solid var(--blue);border-radius:10px;padding:16px 20px;font-size:.93rem;color:#c6d2e4;margin:1.2em 0}
.note.warn{border-left-color:var(--orange);background:#1d1608;border-color:#4a3512}
.note strong{color:var(--txt)}

/* ---------- faq ---------- */
.faq details{background:var(--card);border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden}
.faq summary{cursor:pointer;padding:17px 22px;font-weight:700;font-size:1rem;list-style:none;display:flex;justify-content:space-between;gap:14px;color:var(--txt)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--cyan);font-size:1.3rem;line-height:1.2;flex:none}
.faq details[open] summary::after{content:"−"}
.faq details[open] summary{border-bottom:1px solid var(--line)}
.faq .ans{padding:16px 22px;font-size:.94rem;color:#c6d2e4}
.faq .ans p:last-child,.faq .ans ul:last-child{margin-bottom:0}

/* ---------- screenshot / figure ---------- */
.shot-frame{background:var(--card);border:1px solid var(--line2);border-radius:18px;padding:14px;box-shadow:var(--shadow)}
.shot-frame img{border-radius:10px}
.article .shot-frame{max-width:520px;margin:28px auto}
figcaption{font-size:.85rem;color:var(--dim);text-align:center;padding-top:10px}

/* ---------- breadcrumb ---------- */
.crumb{font-size:.85rem;color:var(--dim);padding:16px 0 0}
.crumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0}
.crumb li+li::before{content:"›";margin-right:6px;color:var(--dim)}
.crumb a{color:var(--muted)}
.crumb [aria-current]{color:var(--cyan)}

/* ---------- article ---------- */
.page-head{padding:46px 0 8px}
.page-head h1{font-size:2.1rem;margin-bottom:12px}
.page-head .sub{color:var(--muted);font-size:1.02rem;max-width:46em}
.article{max-width:860px}
.article h2{margin-top:2em;padding-left:14px;border-left:4px solid var(--cyan)}
.article h3{margin-top:1.6em}
.article table{min-width:520px}
.toc{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px 24px;margin:26px 0}
.toc b{display:block;margin-bottom:10px;color:var(--txt)}
.toc ol{margin:0 0 0 1.2em;columns:2;column-gap:40px;font-size:.93rem}

/* ---------- cta band ---------- */
.cta-band{background:linear-gradient(135deg,#0d2136,#101f3d);border:1px solid #1d3a5e;border-radius:18px;padding:44px 40px;text-align:center;margin:70px 0 0}
.cta-band h2{margin-bottom:10px}
.cta-band p{color:var(--muted);max-width:36em;margin:0 auto 24px}

/* ---------- footer ---------- */
.site-footer{margin-top:90px;background:#080c14;border-top:1px solid var(--line);padding:56px 0 28px;font-size:.92rem}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;margin-bottom:36px}
.site-footer h4{font-size:.98rem;color:var(--txt);margin-bottom:14px}
.site-footer ul{list-style:none;margin:0}
.site-footer li{margin-bottom:9px}
.site-footer a{color:var(--muted)}
.site-footer a:hover{color:var(--cyan)}
.site-footer .about p{color:var(--dim);font-size:.9rem}
.footer-bottom{border-top:1px solid var(--line);padding-top:22px;display:flex;flex-wrap:wrap;gap:10px 26px;justify-content:space-between;color:var(--dim);font-size:.84rem}

/* ---------- responsive ---------- */
@media(max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:38px}
  .hero h1{font-size:2.2rem}
  .g4{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero-shot{max-width:560px;margin:0 auto;justify-self:center}
}
@media(max-width:760px){
  .nav-toggle{display:block}
  .main-nav{position:absolute;top:64px;left:0;right:0;flex-direction:column;align-items:stretch;background:#0b1120;border-bottom:1px solid var(--line);padding:10px 4%;gap:4px;display:none}
  .main-nav.open{display:flex}
  .main-nav a{padding:12px 14px}
  .hero{padding:54px 0 50px}
  .hero h1{font-size:1.75rem}
  .g2,.g3,.g4,.dl-grid,.flist{grid-template-columns:1fr}
  .flist{grid-template-columns:1fr}
  .section{padding:52px 0}
  .footer-grid{grid-template-columns:1fr}
  .toc ol{columns:1}
  .cta-band{padding:32px 22px}
  .page-head h1{font-size:1.6rem}
}