/* ================================================
   Obsidian & Gold — WPS Office Luxury Theme
   ================================================ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
:root{
  --obsidian:#111118;
  --surface:#1a1b24;
  --surface2:#22232e;
  --gold:#c9a84c;
  --gold-light:#e4cc7a;
  --gold-dark:#a08630;
  --cream:#f8f6f1;
  --white:#ffffff;
  --txt-light:#f0ede6;
  --txt-dark:#111118;
  --txt-muted-dark:#8b8a95;
  --txt-muted-light:#6b7280;
  --radius:10px;
  --radius-lg:16px;
  --shadow:0 4px 24px rgba(0,0,0,.08);
  --shadow-gold:0 4px 32px rgba(201,168,76,.15);
}
@keyframes spin{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans SC",sans-serif;line-height:1.7;color:var(--txt-dark);background:var(--cream)}
img,svg{vertical-align:middle}
a{color:inherit;text-decoration:none}

/* ---------- Top Navigation ---------- */
.topbar{position:sticky;top:0;z-index:100;background:var(--obsidian);border-bottom:1px solid rgba(201,168,76,.15)}
.topbar-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:60px}
.logo{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--gold);letter-spacing:.5px}
.logo svg{width:28px;height:28px}
.menu{display:flex;align-items:center;gap:6px}
.menu-link{color:var(--txt-muted-dark);padding:7px 18px;border-radius:99px;font-size:14px;font-weight:500;transition:all .25s}
.menu-link:hover{color:var(--txt-light)}
.menu-link.active{background:var(--gold);color:var(--obsidian);font-weight:600}
.menu-dl{display:inline-flex;align-items:center;gap:6px;padding:7px 20px;border-radius:99px;border:1px solid var(--gold);color:var(--gold);font-size:13px;font-weight:600;cursor:pointer;background:transparent;transition:all .25s}
.menu-dl:hover{background:var(--gold);color:var(--obsidian)}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;cursor:pointer;font-weight:600;border-radius:99px;transition:all .25s;font-family:inherit;line-height:1.4}
.btn-gold{background:linear-gradient(135deg,var(--gold),var(--gold-light));color:var(--obsidian);padding:14px 36px;font-size:16px}
.btn-gold:hover{box-shadow:var(--shadow-gold);transform:translateY(-2px)}
.btn-outline{background:transparent;border:2px solid var(--gold);color:var(--gold);padding:12px 32px;font-size:15px}
.btn-outline:hover{background:var(--gold);color:var(--obsidian)}
.btn-outline-dark{background:transparent;border:2px solid var(--obsidian);color:var(--obsidian);padding:12px 32px;font-size:15px}
.btn-outline-dark:hover{background:var(--obsidian);color:var(--cream)}
.btn-dark{background:var(--obsidian);color:var(--gold);padding:14px 36px;font-size:16px}
.btn-dark:hover{background:var(--surface);transform:translateY(-2px)}
.btn-white{background:var(--white);color:var(--obsidian);padding:14px 36px;font-size:16px}
.btn-white:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.btn-sm{padding:10px 22px;font-size:13px}
.btn-lg{padding:16px 44px;font-size:17px}
.btn svg{width:18px;height:18px}
.btn:disabled{opacity:.6;cursor:not-allowed;transform:none!important}

/* ---------- Sections ---------- */
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.sec{padding:80px 0}
.sec-dark{background:var(--obsidian);color:var(--txt-light)}
.sec-surface{background:var(--surface);color:var(--txt-light)}
.sec-cream{background:var(--cream)}
.sec-white{background:var(--white)}
.sec-gold{background:linear-gradient(135deg,var(--gold),var(--gold-light));color:var(--obsidian)}
.sec-head{text-align:center;margin-bottom:56px}
.sec-tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--gold);margin-bottom:12px}
.sec-dark .sec-tag{color:var(--gold-light)}
.sec-title{font-size:36px;font-weight:800;line-height:1.25;margin-bottom:12px}
.sec-sub{font-size:17px;color:var(--txt-muted-light);max-width:640px;margin:0 auto}
.sec-dark .sec-sub{color:var(--txt-muted-dark)}

/* ---------- Hero ---------- */
.hero{background:var(--obsidian);color:var(--txt-light);padding:100px 0 80px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;top:-40%;right:-10%;width:600px;height:600px;background:radial-gradient(circle,rgba(201,168,76,.12) 0%,transparent 70%);pointer-events:none}
.hero-inner{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.hero-content{position:relative;z-index:1}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:var(--surface2);padding:6px 16px;border-radius:99px;font-size:12px;color:var(--gold);font-weight:600;margin-bottom:20px;letter-spacing:.5px}
.hero-badge svg{width:14px;height:14px}
.hero-title{font-size:48px;font-weight:800;line-height:1.15;margin-bottom:20px}
.hero-title em{font-style:normal;color:var(--gold)}
.hero-desc{font-size:18px;color:var(--txt-muted-dark);line-height:1.8;margin-bottom:32px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:40px}
.hero-stats{display:flex;gap:40px}
.hero-stat-val{font-size:28px;font-weight:800;color:var(--gold)}
.hero-stat-lbl{font-size:13px;color:var(--txt-muted-dark);margin-top:2px}
.hero-visual{position:relative;z-index:1;display:flex;align-items:center;justify-content:center}
.hero-graphic{width:100%;max-width:460px;aspect-ratio:4/3;background:var(--surface);border-radius:var(--radius-lg);border:1px solid rgba(201,168,76,.18);position:relative;overflow:hidden}
.hero-graphic::after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(201,168,76,.06),transparent 60%)}
.hero-doc{position:absolute;border-radius:var(--radius);background:var(--surface2);border:1px solid rgba(201,168,76,.12);display:flex;flex-direction:column;padding:14px;gap:8px}
.hero-doc.doc1{width:200px;height:160px;top:20px;left:20px}
.hero-doc.doc2{width:180px;height:140px;bottom:20px;right:20px;border-color:rgba(201,168,76,.25)}
.hero-doc.doc3{width:140px;height:110px;top:50%;left:50%;transform:translate(-50%,-50%);border-color:var(--gold);box-shadow:var(--shadow-gold)}
.hero-doc-bar{height:6px;border-radius:3px;background:rgba(201,168,76,.2)}
.hero-doc-bar.gold{background:var(--gold);width:60%}
.hero-doc-bar.half{width:80%}
.hero-doc-bar.short{width:45%}
.hero-doc-icon{width:28px;height:28px;color:var(--gold)}

/* ---------- Feature Grid ---------- */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.feat-card{background:var(--white);border-radius:var(--radius-lg);padding:36px 28px;border-top:3px solid var(--gold);box-shadow:var(--shadow);transition:transform .25s}
.feat-card:hover{transform:translateY(-4px)}
.feat-icon{width:48px;height:48px;color:var(--gold);margin-bottom:18px}
.feat-name{font-size:19px;font-weight:700;margin-bottom:10px}
.feat-desc{font-size:14px;color:var(--txt-muted-light);line-height:1.7}

/* ---------- Platform Row ---------- */
.plat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.plat-card{background:var(--surface);border-radius:var(--radius-lg);padding:32px 24px;text-align:center;border:1px solid rgba(201,168,76,.1);transition:all .25s}
.plat-card:hover{border-color:var(--gold);box-shadow:var(--shadow-gold)}
.plat-card.featured{border-color:var(--gold);background:var(--surface2)}
.plat-ico{width:44px;height:44px;color:var(--gold);margin:0 auto 16px}
.plat-name{font-size:17px;font-weight:700;margin-bottom:4px}
.plat-ver{font-size:13px;color:var(--txt-muted-dark);margin-bottom:18px}

/* ---------- Stats Banner ---------- */
.stat-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center;padding:40px 0}
.stat-val{font-size:36px;font-weight:800;background:linear-gradient(135deg,var(--gold),var(--gold-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.sec-gold .stat-val{background:none;-webkit-background-clip:unset;-webkit-text-fill-color:var(--obsidian);background-clip:unset;color:var(--obsidian)}
.stat-lbl{font-size:14px;margin-top:4px}

/* ---------- Deep Feature Rows ---------- */
.deep-row{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding:40px 0}
.deep-row.rev{direction:rtl}
.deep-row.rev>*{direction:ltr}
.deep-badge{display:inline-block;font-size:11px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;color:var(--gold);margin-bottom:10px}
.deep-title{font-size:28px;font-weight:800;margin-bottom:14px;line-height:1.3}
.deep-desc{font-size:15px;color:var(--txt-muted-light);line-height:1.8;margin-bottom:20px}
.deep-visual{background:var(--obsidian);border-radius:var(--radius-lg);aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;border:1px solid rgba(201,168,76,.12);overflow:hidden;position:relative}
.deep-visual svg{width:80px;height:80px;color:var(--gold);opacity:.5}
.sec-dark .deep-desc{color:var(--txt-muted-dark)}
.sec-dark .deep-visual{background:var(--surface);border-color:rgba(201,168,76,.18)}

/* ---------- Reviews ---------- */
.rev-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rev-card{background:var(--white);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow)}
.rev-stars{display:flex;gap:3px;margin-bottom:14px;color:var(--gold)}
.rev-stars svg{width:16px;height:16px}
.rev-text{font-size:14px;color:var(--txt-muted-light);line-height:1.8;margin-bottom:16px}
.rev-author{display:flex;align-items:center;gap:10px}
.rev-avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--gold),var(--gold-light));display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;color:var(--obsidian)}
.rev-name{font-size:14px;font-weight:600}
.rev-role{font-size:12px;color:var(--txt-muted-light)}

/* ---------- Comparison Table ---------- */
.cmp-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
.cmp-table{width:100%;border-collapse:collapse;text-align:center;font-size:14px}
.cmp-table th{background:var(--surface2);color:var(--txt-light);padding:14px 18px;font-weight:700;white-space:nowrap}
.cmp-table td{padding:12px 18px;border-bottom:1px solid rgba(255,255,255,.06)}
.cmp-table tr:hover td{background:rgba(201,168,76,.04)}
.cmp-table .hl{color:var(--gold);font-weight:700}
.sec-cream .cmp-table th{background:var(--obsidian);color:var(--gold)}
.sec-cream .cmp-table td{border-bottom:1px solid #e5e3dc}

/* ---------- FAQ ---------- */
.faq-list{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{border-radius:var(--radius);overflow:hidden}
.sec-cream .faq-item{background:var(--white);box-shadow:0 2px 8px rgba(0,0,0,.04)}
.sec-dark .faq-item{background:var(--surface);border:1px solid rgba(201,168,76,.08)}
.faq-question{display:flex;align-items:center;justify-content:space-between;padding:18px 22px;cursor:pointer;font-weight:600;font-size:15px;gap:16px;user-select:none}
.faq-question svg{width:20px;height:20px;flex-shrink:0;color:var(--gold);transition:transform .3s}
.faq-item.open .faq-question svg{transform:rotate(180deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease;padding:0 22px}
.faq-item.open .faq-answer{max-height:600px;padding:0 22px 18px}
.faq-answer p{font-size:14px;line-height:1.8;color:var(--txt-muted-light)}
.sec-dark .faq-answer p{color:var(--txt-muted-dark)}

/* ---------- CTA Block ---------- */
.cta-block{text-align:center;padding:60px 40px;border-radius:var(--radius-lg);background:var(--obsidian);border:1px solid rgba(201,168,76,.15);position:relative;overflow:hidden}
.cta-block::before{content:"";position:absolute;top:-60%;left:50%;transform:translateX(-50%);width:500px;height:500px;background:radial-gradient(circle,rgba(201,168,76,.1),transparent 70%);pointer-events:none}
.cta-block .sec-title{color:var(--txt-light)}
.cta-block .sec-sub{color:var(--txt-muted-dark)}

/* ---------- Download Page Hero ---------- */
.dl-hero{background:var(--obsidian);color:var(--txt-light);padding:100px 0 60px;text-align:center}
.dl-hero .sec-title{font-size:40px;margin-bottom:14px}
.dl-hero .sec-sub{margin-bottom:40px}
.dl-main{max-width:560px;margin:0 auto;background:var(--surface);border:1px solid rgba(201,168,76,.2);border-radius:var(--radius-lg);padding:40px;text-align:center}
.dl-main-title{font-size:22px;font-weight:700;margin-bottom:8px}
.dl-meta{display:flex;justify-content:center;gap:24px;margin:14px 0 24px;font-size:13px;color:var(--txt-muted-dark)}
.dl-meta-item{display:flex;align-items:center;gap:5px}
.dl-meta-item svg{width:14px;height:14px;color:var(--gold)}
.dl-specs{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:20px}
.dl-spec{background:var(--surface2);border-radius:var(--radius);padding:12px;font-size:12px;color:var(--txt-muted-dark)}
.dl-spec strong{display:block;color:var(--txt-light);font-size:13px;margin-bottom:2px}

/* ---------- Guide Steps ---------- */
.guide-steps{display:flex;flex-direction:column;gap:20px;max-width:700px;margin:0 auto}
.gstep{display:flex;gap:20px;align-items:flex-start}
.gstep-num{flex-shrink:0;width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--gold),var(--gold-light));color:var(--obsidian);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:16px}
.gstep-body{padding-top:6px}
.gstep-title{font-weight:700;font-size:16px;margin-bottom:4px}
.gstep-desc{font-size:14px;color:var(--txt-muted-light)}
.sec-dark .gstep-desc{color:var(--txt-muted-dark)}

/* ---------- Req Grid ---------- */
.req-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.req-card{background:var(--surface);border-radius:var(--radius);padding:22px;border-left:3px solid var(--gold)}
.req-card dt{font-size:12px;color:var(--txt-muted-dark);margin-bottom:4px;text-transform:uppercase;letter-spacing:1px}
.req-card dd{font-size:15px;font-weight:600;color:var(--txt-light)}

/* ---------- Version Log ---------- */
.ver-list{max-width:700px;margin:0 auto;display:flex;flex-direction:column;gap:20px}
.ver-item{display:flex;gap:20px;align-items:flex-start}
.ver-dot{flex-shrink:0;width:14px;height:14px;border-radius:50%;background:var(--gold);margin-top:5px;position:relative}
.ver-dot::after{content:"";position:absolute;top:14px;left:50%;transform:translateX(-50%);width:2px;height:40px;background:rgba(201,168,76,.2)}
.ver-item:last-child .ver-dot::after{display:none}
.ver-tag{display:inline-block;font-size:11px;font-weight:700;background:var(--gold);color:var(--obsidian);padding:2px 10px;border-radius:99px;margin-bottom:4px}
.ver-date{font-size:12px;color:var(--txt-muted-dark);margin-bottom:4px}
.ver-body{font-size:14px;color:var(--txt-muted-dark);line-height:1.7}
.sec-cream .ver-dot::after{background:rgba(201,168,76,.3)}
.sec-cream .ver-body,.sec-cream .ver-date{color:var(--txt-muted-light)}

/* ---------- Article Layout (zh-cn) ---------- */
.article-hero{background:var(--obsidian);color:var(--txt-light);padding:80px 0 60px;text-align:center}
.kw-strip{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:24px}
.kw{display:inline-block;padding:5px 14px;border-radius:99px;font-size:12px;font-weight:600;background:var(--surface2);color:var(--gold);border:1px solid rgba(201,168,76,.15)}
.article-layout{display:grid;grid-template-columns:1fr 320px;gap:48px;align-items:flex-start}
.article-body h2{font-size:26px;font-weight:800;margin:48px 0 16px;padding-bottom:10px;border-bottom:2px solid var(--gold)}
.article-body h2:first-child{margin-top:0}
.article-body h3{font-size:20px;font-weight:700;margin:28px 0 12px}
.article-body p{font-size:15px;line-height:1.9;color:var(--txt-muted-light);margin-bottom:16px}
.article-body ul{padding-left:20px;margin-bottom:16px}
.article-body li{font-size:14px;line-height:1.9;color:var(--txt-muted-light);margin-bottom:6px}
.inline-cta{background:linear-gradient(135deg,var(--obsidian),var(--surface));color:var(--txt-light);padding:28px 32px;border-radius:var(--radius-lg);margin:32px 0;display:flex;align-items:center;justify-content:space-between;gap:20px;border:1px solid rgba(201,168,76,.15)}
.inline-cta p{font-size:15px;font-weight:600;color:var(--txt-light)}
.sidebar{position:sticky;top:80px;display:flex;flex-direction:column;gap:20px}
.sbox{background:var(--white);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow)}
.sbox-title{font-size:15px;font-weight:700;margin-bottom:14px;padding-bottom:8px;border-bottom:2px solid var(--gold)}
.sbox .btn{width:100%;margin-bottom:8px}
.sbox .btn:last-child{margin-bottom:0}
.stoc{list-style:none;padding:0}
.stoc li{margin-bottom:8px}
.stoc a{font-size:13px;color:var(--txt-muted-light);display:flex;align-items:center;gap:6px;transition:color .2s}
.stoc a::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--gold);flex-shrink:0}
.stoc a:hover{color:var(--gold)}
.sstat{display:flex;flex-direction:column;gap:12px}
.sstat-item{display:flex;justify-content:space-between;align-items:center;font-size:13px}
.sstat-num{font-weight:800;color:var(--gold);font-size:16px}
.side-security{background:var(--obsidian);color:var(--txt-light);border-radius:var(--radius);padding:16px;font-size:12px;line-height:1.7;text-align:center}
.side-security svg{width:20px;height:20px;color:var(--gold);margin-bottom:6px}

/* ---------- Footer ---------- */
.site-footer{background:var(--obsidian);color:var(--txt-muted-dark);padding:40px 0;text-align:center;font-size:13px;line-height:1.8;border-top:1px solid rgba(201,168,76,.1)}
.footer-brand{font-size:16px;font-weight:700;color:var(--gold);margin-bottom:12px}
.footer-security{display:flex;align-items:center;justify-content:center;gap:6px;color:var(--gold-light);margin-bottom:8px;font-size:13px}
.footer-security svg{width:16px;height:16px}
.footer-note{color:var(--txt-muted-dark);max-width:600px;margin:0 auto}

/* ---------- Responsive ---------- */
@media(max-width:1024px){
  .hero-inner{grid-template-columns:1fr;text-align:center}
  .hero-actions{justify-content:center}
  .hero-stats{justify-content:center}
  .hero-visual{display:none}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .plat-grid{grid-template-columns:repeat(2,1fr)}
  .deep-row,.deep-row.rev{grid-template-columns:1fr;direction:ltr}
  .deep-visual{max-height:260px}
  .rev-grid{grid-template-columns:1fr 1fr}
  .article-layout{grid-template-columns:1fr}
  .sidebar{position:static}
  .stat-bar{grid-template-columns:repeat(2,1fr);gap:16px}
  .req-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  .topbar-inner{padding:0 16px}
  .menu-link{padding:6px 12px;font-size:13px}
  .hero{padding:60px 0 50px}
  .hero-title{font-size:32px}
  .hero-desc{font-size:16px}
  .sec{padding:50px 0}
  .sec-title{font-size:28px}
  .feat-grid{grid-template-columns:1fr}
  .plat-grid{grid-template-columns:1fr}
  .rev-grid{grid-template-columns:1fr}
  .deep-row{gap:30px}
  .dl-specs{grid-template-columns:1fr}
  .req-grid{grid-template-columns:1fr}
  .stat-bar{grid-template-columns:1fr}
  .inline-cta{flex-direction:column;text-align:center}
}