/* ========================================
   WPS Office Download Site — Warm Amber Editorial Theme
   Unique: magazine-style layout, amber/warm gradients, 
   timeline sections, tabbed UI, floating nav dots
   ======================================== */

@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

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

:root{
  --amber:#D97706;
  --amber-dark:#B45309;
  --amber-light:#FEF3C7;
  --amber-glow:rgba(217,119,6,.15);
  --teal:#0D9488;
  --teal-light:#CCFBF1;
  --slate:#1E293B;
  --slate-mid:#475569;
  --slate-light:#94A3B8;
  --bg:#FFFBF5;
  --bg-alt:#FFF7ED;
  --white:#FFFFFF;
  --border:#E7E0D6;
  --radius:14px;
  --shadow:0 8px 32px rgba(30,41,59,.08);
  --shadow-lg:0 16px 48px rgba(217,119,6,.12);
}

html{scroll-behavior:smooth}
body{font-family:'Segoe UI',system-ui,-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;color:var(--slate);background:var(--bg);line-height:1.7}
a{color:inherit;text-decoration:none}

/* ─── TOP NAV BAR ─── */
.topbar{position:sticky;top:0;z-index:200;background:rgba(255,251,245,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--border);transition:box-shadow .3s}
.topbar.scrolled{box-shadow:0 2px 16px rgba(30,41,59,.06)}
.topbar-inner{max-width:1140px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;height:62px;padding:0 24px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem;color:var(--amber-dark)}
.brand svg{flex-shrink:0}
.nav-menu{display:flex;gap:6px;list-style:none}
.nav-menu a{display:block;padding:8px 18px;border-radius:8px;font-size:.9rem;font-weight:500;color:var(--slate-mid);transition:all .2s}
.nav-menu a:hover{background:var(--amber-light);color:var(--amber-dark)}
.nav-menu a.on{background:var(--amber);color:#fff;font-weight:600}
.mob-toggle{display:none;background:none;border:none;cursor:pointer;color:var(--slate)}

/* ─── HERO SECTION ─── */
.hero{position:relative;overflow:hidden;padding:88px 24px 72px;text-align:center;background:linear-gradient(160deg,#FFF7ED 0%,#FDE68A 40%,#FBBF24 100%)}
.hero::before{content:'';position:absolute;top:-120px;right:-120px;width:400px;height:400px;border-radius:50%;background:radial-gradient(circle,rgba(217,119,6,.18) 0%,transparent 70%);pointer-events:none}
.hero::after{content:'';position:absolute;bottom:-80px;left:-60px;width:300px;height:300px;border-radius:50%;background:radial-gradient(circle,rgba(13,148,136,.12) 0%,transparent 70%);pointer-events:none}
.hero-wrap{position:relative;max-width:780px;margin:0 auto}
.hero-chip{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.65);border:1px solid rgba(217,119,6,.25);border-radius:24px;padding:6px 16px;font-size:.8rem;font-weight:600;color:var(--amber-dark);margin-bottom:20px}
.hero h1{font-size:clamp(2rem,5.5vw,3.4rem);font-weight:900;line-height:1.12;margin-bottom:16px;letter-spacing:-.5px;color:var(--slate)}
.hero h1 em{font-style:normal;color:var(--amber-dark);position:relative}
.hero h1 em::after{content:'';position:absolute;left:0;bottom:2px;width:100%;height:8px;background:rgba(217,119,6,.2);border-radius:4px;z-index:-1}
.hero-desc{font-size:1.1rem;color:var(--slate-mid);max-width:560px;margin:0 auto 32px;line-height:1.8}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}

/* ─── BUTTONS ─── */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 30px;border-radius:10px;font-size:.95rem;font-weight:700;cursor:pointer;border:none;transition:all .25s}
.btn-amber{background:var(--amber);color:#fff;box-shadow:0 4px 16px rgba(217,119,6,.3)}
.btn-amber:hover{background:var(--amber-dark);transform:translateY(-2px);box-shadow:0 6px 24px rgba(217,119,6,.4)}
.btn-white{background:#fff;color:var(--amber-dark);border:2px solid var(--amber)}
.btn-white:hover{background:var(--amber-light)}
.btn-teal{background:var(--teal);color:#fff;box-shadow:0 4px 16px rgba(13,148,136,.3)}
.btn-teal:hover{background:#0F766E;transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--slate);border:2px solid var(--border)}
.btn-ghost:hover{border-color:var(--amber);color:var(--amber-dark)}
.btn-lg{padding:16px 36px;font-size:1.05rem}

/* ─── STATISTICS ROW ─── */
.stats-row{display:flex;flex-wrap:wrap;justify-content:center;gap:48px;padding:48px 24px;max-width:1140px;margin:0 auto}
.stat-item{text-align:center}
.stat-num{font-size:2.2rem;font-weight:900;color:var(--amber-dark);line-height:1}
.stat-label{font-size:.85rem;color:var(--slate-light);margin-top:6px}

/* ─── SECTIONS ─── */
.section{padding:72px 24px}
.section-inner{max-width:1140px;margin:0 auto}
.sec-tag{display:inline-block;background:var(--amber-light);color:var(--amber-dark);font-size:.75rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;padding:5px 14px;border-radius:20px;margin-bottom:14px}
.sec-tag.teal{background:var(--teal-light);color:var(--teal)}
.sec-title{font-size:clamp(1.5rem,3.5vw,2.3rem);font-weight:900;line-height:1.2;margin-bottom:10px;color:var(--slate)}
.sec-desc{color:var(--slate-mid);max-width:560px;line-height:1.7}
.sec-center{text-align:center}
.sec-center .sec-desc{margin:0 auto}

/* ─── MAGAZINE 2-COL LAYOUT ─── */
.mag-row{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;margin-top:48px}
.mag-row.reverse{direction:rtl}
.mag-row.reverse>*{direction:ltr}
.mag-visual{background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius);padding:40px;display:flex;align-items:center;justify-content:center;min-height:280px;position:relative;overflow:hidden}
.mag-visual svg{width:100%;max-width:280px;height:auto}
.mag-text h3{font-size:1.4rem;font-weight:800;margin-bottom:12px}
.mag-text p{color:var(--slate-mid);line-height:1.8}
.mag-text ul{list-style:none;margin-top:16px;display:flex;flex-direction:column;gap:10px}
.mag-text ul li{display:flex;align-items:flex-start;gap:10px;font-size:.92rem;color:var(--slate-mid)}
.mag-text ul li svg{flex-shrink:0;margin-top:3px}

/* ─── TILE GRID (3 cols) ─── */
.tile-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px;margin-top:44px}
.tile{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:32px;transition:all .25s}
.tile:hover{box-shadow:var(--shadow);transform:translateY(-4px)}
.tile-icon{width:52px;height:52px;border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.tile-icon.amber{background:var(--amber-light)}
.tile-icon.teal{background:var(--teal-light)}
.tile-icon.slate{background:#E2E8F0}
.tile h3{font-size:1.05rem;font-weight:700;margin-bottom:8px}
.tile p{font-size:.88rem;color:var(--slate-mid);line-height:1.7}

/* ─── TIMELINE ─── */
.timeline{position:relative;margin-top:48px;padding-left:32px}
.timeline::before{content:'';position:absolute;left:11px;top:0;bottom:0;width:2px;background:linear-gradient(to bottom,var(--amber),var(--teal))}
.tl-item{position:relative;margin-bottom:36px}
.tl-dot{position:absolute;left:-32px;top:4px;width:22px;height:22px;border-radius:50%;background:var(--amber);border:3px solid var(--bg);box-shadow:0 0 0 2px var(--amber)}
.tl-item:nth-child(even) .tl-dot{background:var(--teal);box-shadow:0 0 0 2px var(--teal)}
.tl-item h4{font-size:1rem;font-weight:700;margin-bottom:4px}
.tl-item p{font-size:.88rem;color:var(--slate-mid)}

/* ─── TABS ─── */
.tab-bar{display:flex;gap:4px;border-bottom:2px solid var(--border);margin-bottom:32px;margin-top:40px}
.tab-btn{padding:12px 24px;font-size:.92rem;font-weight:600;background:none;border:none;cursor:pointer;color:var(--slate-light);border-bottom:3px solid transparent;margin-bottom:-2px;transition:all .2s}
.tab-btn.active{color:var(--amber-dark);border-bottom-color:var(--amber)}
.tab-panel{display:none}
.tab-panel.active{display:block}

/* ─── PLATFORM DOWNLOAD CARDS ─── */
.dl-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-top:32px}
.dl-card{background:var(--white);border:2px solid var(--border);border-radius:var(--radius);padding:28px 24px;text-align:center;transition:all .25s}
.dl-card:hover{border-color:var(--amber);box-shadow:var(--shadow-lg)}
.dl-card.featured{border-color:var(--amber);background:linear-gradient(to bottom,var(--amber-light),var(--white))}
.dl-card .dl-icon{width:56px;height:56px;margin:0 auto 16px;display:flex;align-items:center;justify-content:center;border-radius:14px;background:var(--amber-light)}
.dl-card.featured .dl-icon{background:var(--amber);color:#fff}
.dl-card h3{font-size:1.1rem;font-weight:700;margin-bottom:6px}
.dl-card p{font-size:.82rem;color:var(--slate-light);margin-bottom:16px}
.dl-card .badge{display:inline-block;background:var(--teal);color:#fff;font-size:.7rem;font-weight:700;padding:3px 10px;border-radius:12px;margin-bottom:12px}

/* ─── FAQ ACCORDION ─── */
.faq-list{max-width:800px;margin:44px auto 0;display:flex;flex-direction:column;gap:10px}
.faq-item{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:border-color .3s}
.faq-item:hover{border-color:var(--amber)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;padding:18px 22px;font-weight:600;font-size:.95rem;cursor:pointer;background:none;border:none;text-align:left;color:var(--slate);gap:12px}
.faq-q svg{flex-shrink:0;transition:transform .3s;color:var(--amber)}
.faq-item.open .faq-q svg{transform:rotate(180deg)}
.faq-item.open{border-color:var(--amber);box-shadow:0 2px 12px var(--amber-glow)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease,padding .3s}
.faq-item.open .faq-a{max-height:600px;padding:0 22px 20px}
.faq-a p{font-size:.9rem;color:var(--slate-mid);line-height:1.8}

/* ─── TESTIMONIALS ─── */
.review-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;margin-top:44px}
.review-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:28px;position:relative}
.review-card::before{content:'"';position:absolute;top:12px;right:20px;font-size:3rem;font-weight:900;color:var(--amber-light);line-height:1}
.review-stars{display:flex;gap:2px;margin-bottom:12px}
.review-card p{font-size:.9rem;color:var(--slate-mid);line-height:1.7;margin-bottom:14px}
.review-author{font-weight:700;font-size:.85rem;color:var(--slate)}
.review-role{font-size:.78rem;color:var(--slate-light)}

/* ─── COMPARISON TABLE ─── */
.cmp-wrap{overflow-x:auto;margin-top:36px}
.cmp-table{width:100%;border-collapse:collapse;min-width:640px}
.cmp-table th,.cmp-table td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--border);font-size:.9rem}
.cmp-table th{background:var(--bg-alt);font-weight:700;color:var(--slate);position:sticky;top:0}
.cmp-table td{color:var(--slate-mid)}
.cmp-table tr:hover td{background:var(--amber-light)}
.cmp-table .check{color:var(--teal);font-weight:700}
.cmp-table .cross{color:var(--slate-light)}

/* ─── CTA BANNER ─── */
.cta-section{background:linear-gradient(135deg,var(--amber) 0%,#F59E0B 50%,var(--teal) 100%);padding:64px 24px;text-align:center;color:#fff;border-radius:var(--radius);max-width:1140px;margin:0 auto 48px;position:relative;overflow:hidden}
.cta-section::before{content:'';position:absolute;inset:0;pointer-events:none;background:url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ffffff' fill-opacity='0.06'%3E%3Cpath d='M20 20.5V18H0v-2h20v-2l4 3.25-4 3.25zM0 0h2v20H0V0z'/%3E%3C/g%3E%3C/svg%3E")}
.cta-section h2{font-size:clamp(1.5rem,3.5vw,2.4rem);font-weight:900;margin-bottom:12px;position:relative}
.cta-section p{opacity:.92;margin-bottom:28px;font-size:1.05rem;position:relative}
.cta-section .btn{position:relative;z-index:1}

/* ─── FOOTER ─── */
.site-footer{background:var(--slate);color:rgba(255,255,255,.7);padding:36px 24px;text-align:center;font-size:.82rem;line-height:1.8}
.site-footer strong{color:#fff;font-weight:600}
.footer-security{display:flex;align-items:center;justify-content:center;gap:6px;margin-bottom:8px;color:var(--amber-light)}
.footer-security svg{flex-shrink:0}

/* ─── VERSION BADGE ─── */
.ver-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}
.ver-badge{display:inline-flex;align-items:center;gap:6px;background:var(--bg-alt);border:1px solid var(--border);border-radius:8px;padding:8px 14px;font-size:.82rem;color:var(--slate-mid)}

/* ─── TIPS LIST ─── */
.tips-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin-top:32px}
.tip-card{background:var(--white);border-left:4px solid var(--amber);border-radius:0 var(--radius) var(--radius) 0;padding:20px 22px;box-shadow:0 2px 12px rgba(30,41,59,.04)}
.tip-card h4{font-size:.95rem;font-weight:700;margin-bottom:6px}
.tip-card p{font-size:.85rem;color:var(--slate-mid);line-height:1.7}

/* ─── RESPONSIVE ─── */
@media(max-width:768px){
  .mag-row{grid-template-columns:1fr;gap:28px}
  .mag-row.reverse{direction:ltr}
  .stats-row{gap:28px}
  .stat-num{font-size:1.7rem}
  .hero h1{font-size:1.8rem}
  .dl-grid{grid-template-columns:1fr}
  .tab-bar{flex-wrap:wrap}
  .nav-menu{display:none;position:absolute;top:62px;left:0;right:0;background:var(--bg);flex-direction:column;padding:16px;gap:4px;border-bottom:1px solid var(--border);box-shadow:var(--shadow)}
  .nav-menu.show{display:flex}
  .mob-toggle{display:block}
  .cta-section{border-radius:0;margin:0 0 0}
  .review-grid{grid-template-columns:1fr}
  .tile-grid{grid-template-columns:1fr}
}