/* WPS Office Landing Site - Oceanic Professional Theme */
/* Design: centered hero, tab-feature, stats row, card grid, table comparison, accordion FAQ */

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

:root{
  --blue:#1a6fc4;
  --blue-dark:#145aa0;
  --blue-light:#3d8fe0;
  --teal:#0fa8a0;
  --teal-light:#13c4bb;
  --bg:#f0f4f9;
  --bg-white:#ffffff;
  --bg-deep:#04152d;
  --text:#1c2b3a;
  --text-mid:#4a6070;
  --text-light:#7a92a6;
  --border:#d0dde8;
  --shadow:0 2px 16px rgba(26,111,196,.08);
  --shadow-md:0 6px 32px rgba(26,111,196,.13);
  --shadow-lg:0 16px 56px rgba(26,111,196,.18);
  --radius:10px;
  --radius-lg:18px;
  --tr:.28s ease;
}

@keyframes spin{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}
@keyframes fadeUp{from{opacity:0;transform:translateY(28px)}to{opacity:1;transform:translateY(0)}}
@keyframes scaleIn{from{opacity:0;transform:scale(.94)}to{opacity:1;transform:scale(1)}}
@keyframes shimmer{0%{background-position:-400px 0}100%{background-position:400px 0}}
@keyframes wave{0%,100%{transform:translateY(0) rotate(-1deg)}50%{transform:translateY(-14px) rotate(1deg)}}

html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,sans-serif;
  line-height:1.75;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit;transition:color var(--tr)}
button{cursor:pointer;border:none;font-family:inherit}
img{max-width:100%;display:block}

/* ─── NAV ─── */
.nav{position:fixed;top:0;left:0;right:0;z-index:900;
  background:rgba(255,255,255,.94);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--border);transition:box-shadow var(--tr)}
.nav.scrolled{box-shadow:0 2px 24px rgba(26,111,196,.1)}
.nav-wrap{max-width:1160px;margin:0 auto;padding:0 28px;
  display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.18rem;color:var(--blue)}
.logo svg{flex-shrink:0}
.navlist{display:flex;list-style:none;gap:4px}
.navlist a{display:inline-block;padding:8px 20px;border-radius:8px;
  font-size:.94rem;font-weight:500;color:var(--text-mid);transition:all var(--tr)}
.navlist a:hover{color:var(--blue);background:rgba(26,111,196,.06)}
.navlist a.on{color:var(--blue);background:rgba(26,111,196,.11);font-weight:700}
.nav-toggle{display:none;background:none;padding:6px;color:var(--text)}

/* ─── HERO ─── */
.hero{margin-top:66px;background:linear-gradient(135deg,#04152d 0%,#0d2e56 45%,#0b3b5c 100%);
  padding:100px 28px 40px;text-align:center;position:relative}
.hero::before{content:'';position:absolute;inset:0;
  background:radial-gradient(ellipse 70% 60% at 50% 0%,rgba(26,111,196,.32) 0%,transparent 70%)}
.hero-tag{display:inline-flex;align-items:center;gap:7px;
  background:rgba(13,196,187,.15);border:1px solid rgba(13,196,187,.35);
  color:#13c4bb;border-radius:99px;padding:6px 18px;font-size:.85rem;font-weight:600;
  margin-bottom:28px;animation:fadeUp .6s ease both}
.hero h1{font-size:clamp(2rem,5vw,3.4rem);font-weight:800;color:#fff;
  line-height:1.22;max-width:760px;margin:0 auto 22px;
  animation:fadeUp .7s .1s ease both}
.hero h1 em{font-style:normal;
  background:linear-gradient(90deg,#13c4bb,#3d8fe0);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-sub{max-width:560px;margin:0 auto 40px;color:rgba(255,255,255,.72);
  font-size:1.08rem;animation:fadeUp .7s .18s ease both}
.hero-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;
  animation:fadeUp .7s .26s ease both;margin-bottom:56px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;
  border-radius:10px;font-size:1rem;font-weight:600;transition:all var(--tr)}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 4px 20px rgba(26,111,196,.4)}
.btn-primary:hover{background:var(--blue-dark);box-shadow:0 6px 28px rgba(26,111,196,.55);transform:translateY(-2px)}
.btn-teal{background:var(--teal);color:#fff;box-shadow:0 4px 20px rgba(15,168,160,.35)}
.btn-teal:hover{background:#0a8e87;box-shadow:0 6px 28px rgba(15,168,160,.5);transform:translateY(-2px)}
.btn-outline-w{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.45)}
.btn-outline-w:hover{background:rgba(255,255,255,.1);border-color:#fff}
.btn-lg{padding:16px 40px;font-size:1.08rem}
.btn-sm{padding:10px 22px;font-size:.9rem}

.hero-mockup{position:relative;max-width:880px;margin:0 auto;animation:fadeUp .8s .35s ease both}
.hero-mockup-inner{
  background:linear-gradient(160deg,#0e2f52,#163d60);
  border-radius:16px 16px 0 0;border:1px solid rgba(255,255,255,.1);
  border-bottom:none;padding:28px 28px 28px;min-height:220px;
  display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px}
.mock-card{background:rgba(255,255,255,.06);border-radius:10px;padding:20px;
  border:1px solid rgba(255,255,255,.08)}
.mock-card-icon{width:36px;height:36px;border-radius:8px;margin-bottom:12px;
  display:flex;align-items:center;justify-content:center}
.mock-card-icon.ic-doc{background:rgba(26,111,196,.3)}
.mock-card-icon.ic-sheet{background:rgba(15,168,160,.3)}
.mock-card-icon.ic-ppt{background:rgba(230,126,34,.25)}
.mock-bar{height:8px;border-radius:4px;background:rgba(255,255,255,.12);margin-bottom:8px}
.mock-bar.w80{width:80%}.mock-bar.w60{width:60%}.mock-bar.w90{width:90%}.mock-bar.w50{width:50%}

/* ─── STATS ─── */
.stats{background:var(--blue);padding:36px 28px}
.stats-wrap{max-width:1160px;margin:0 auto;
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat-item{display:flex;flex-direction:column;align-items:center}
.stat-num{font-size:2.2rem;font-weight:800;color:#fff;line-height:1.1}
.stat-unit{font-size:1rem;font-weight:600;color:rgba(255,255,255,.7)}
.stat-label{font-size:.88rem;color:rgba(255,255,255,.65);margin-top:4px}

/* ─── SECTION COMMONS ─── */
.section{padding:80px 28px}
.section-white{background:var(--bg-white)}
.section-gray{background:var(--bg)}
.section-dark{background:var(--bg-deep)}
.sec-inner{max-width:1160px;margin:0 auto}
.sec-header{text-align:center;margin-bottom:56px}
.sec-tag{display:inline-block;background:rgba(26,111,196,.1);color:var(--blue);
  border-radius:99px;padding:5px 16px;font-size:.82rem;font-weight:700;
  text-transform:uppercase;letter-spacing:.04em;margin-bottom:14px}
.sec-title{font-size:clamp(1.7rem,3.5vw,2.4rem);font-weight:800;color:var(--text);line-height:1.28}
.sec-title em{font-style:normal;color:var(--blue)}
.sec-sub{max-width:540px;margin:14px auto 0;color:var(--text-mid);font-size:1.02rem}

/* ─── TAB FEATURES ─── */
.tabs-bar{display:flex;gap:0;justify-content:center;flex-wrap:wrap;
  border-radius:12px;overflow:hidden;border:1px solid var(--border);
  background:var(--bg-white);width:fit-content;margin:0 auto 48px}
.tab-btn{padding:12px 28px;background:none;font-size:.95rem;font-weight:600;
  color:var(--text-mid);transition:all var(--tr);border:none;cursor:pointer;white-space:nowrap}
.tab-btn.active{background:var(--blue);color:#fff}
.tab-panel{display:none}
.tab-panel.active{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.tab-visual{background:linear-gradient(135deg,rgba(26,111,196,.07),rgba(15,168,160,.07));
  border-radius:var(--radius-lg);padding:40px;border:1px solid var(--border);
  min-height:280px;display:flex;align-items:center;justify-content:center}
.tab-icon-big{width:120px;height:120px;border-radius:24px;
  display:flex;align-items:center;justify-content:center;margin:0 auto}
.tab-icon-big.doc{background:rgba(26,111,196,.15)}
.tab-icon-big.sheet{background:rgba(15,168,160,.15)}
.tab-icon-big.ppt{background:rgba(230,126,34,.15)}
.tab-icon-big.pdf{background:rgba(192,57,43,.15)}
.tab-info h3{font-size:1.6rem;font-weight:800;color:var(--text);margin-bottom:16px}
.tab-info p{color:var(--text-mid);margin-bottom:20px;font-size:1.02rem}
.feat-list{list-style:none;display:flex;flex-direction:column;gap:12px}
.feat-list li{display:flex;align-items:flex-start;gap:10px;color:var(--text-mid)}
.feat-list li svg{flex-shrink:0;margin-top:3px;color:var(--teal)}

/* ─── CARD GRID ─── */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{background:var(--bg-white);border-radius:var(--radius-lg);padding:32px;
  border:1px solid var(--border);box-shadow:var(--shadow);
  transition:all var(--tr)}
.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px);border-color:rgba(26,111,196,.25)}
.card-icon{width:52px;height:52px;border-radius:14px;margin-bottom:20px;
  display:flex;align-items:center;justify-content:center}
.card-icon.ci-blue{background:rgba(26,111,196,.1)}
.card-icon.ci-teal{background:rgba(15,168,160,.1)}
.card-icon.ci-purple{background:rgba(108,99,255,.1)}
.card-icon.ci-orange{background:rgba(230,126,34,.1)}
.card-icon.ci-green{background:rgba(39,174,96,.1)}
.card-icon.ci-red{background:rgba(192,57,43,.1)}
.card h3{font-size:1.15rem;font-weight:700;color:var(--text);margin-bottom:10px}
.card p{color:var(--text-mid);font-size:.95rem;line-height:1.68}

/* ─── TESTIMONIALS ─── */
.testi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.testi-card{background:var(--bg-white);border-radius:var(--radius-lg);padding:28px;
  border:1px solid var(--border);box-shadow:var(--shadow)}
.testi-stars{display:flex;gap:3px;margin-bottom:14px}
.testi-stars svg{color:#f0a500}
.testi-text{color:var(--text-mid);font-size:.96rem;line-height:1.7;margin-bottom:18px;font-style:italic}
.testi-author{display:flex;align-items:center;gap:12px}
.testi-avatar{width:40px;height:40px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1rem;color:#fff}
.av-a{background:linear-gradient(135deg,var(--blue),var(--teal))}
.av-b{background:linear-gradient(135deg,#6c63ff,#3d8fe0)}
.av-c{background:linear-gradient(135deg,var(--teal),#27ae60)}
.av-d{background:linear-gradient(135deg,#e67e22,#e74c3c)}
.av-e{background:linear-gradient(135deg,#8e44ad,#3d8fe0)}
.av-f{background:linear-gradient(135deg,#2ecc71,#1a6fc4)}
.testi-name{font-weight:700;font-size:.95rem;color:var(--text)}
.testi-role{font-size:.83rem;color:var(--text-light)}

/* ─── CTA BANNER ─── */
.cta-banner{background:linear-gradient(100deg,var(--blue-dark) 0%,var(--blue) 50%,var(--teal) 100%);
  border-radius:var(--radius-lg);padding:56px 48px;text-align:center;
  box-shadow:0 12px 48px rgba(26,111,196,.3)}
.cta-banner h2{font-size:clamp(1.6rem,3.5vw,2.2rem);font-weight:800;color:#fff;margin-bottom:14px}
.cta-banner p{color:rgba(255,255,255,.78);font-size:1.05rem;margin-bottom:32px}
.cta-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn-white{background:#fff;color:var(--blue);font-weight:700}
.btn-white:hover{background:rgba(255,255,255,.92);box-shadow:0 4px 20px rgba(0,0,0,.15)}
.btn-outline-teal{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.5);font-weight:600}
.btn-outline-teal:hover{background:rgba(255,255,255,.12);border-color:#fff}

/* ─── PLATFORM DL ─── */
.plat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.plat-box{background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:28px 20px;text-align:center;box-shadow:var(--shadow);transition:all var(--tr)}
.plat-box:hover{box-shadow:var(--shadow-md);transform:translateY(-3px);border-color:var(--blue)}
.plat-box.featured{border-color:var(--blue);box-shadow:0 4px 28px rgba(26,111,196,.18);
  position:relative}
.plat-badge{position:absolute;top:-12px;left:50%;transform:translateX(-50%);
  background:var(--blue);color:#fff;border-radius:99px;padding:4px 16px;
  font-size:.78rem;font-weight:700;white-space:nowrap}
.plat-icon{width:64px;height:64px;border-radius:16px;
  display:flex;align-items:center;justify-content:center;margin:0 auto 16px}
.pi-win{background:rgba(26,111,196,.1)}
.pi-mac{background:rgba(60,60,60,.1)}
.pi-ios{background:rgba(0,122,255,.1)}
.pi-and{background:rgba(61,178,73,.1)}
.plat-name{font-size:1.1rem;font-weight:700;color:var(--text);margin-bottom:6px}
.plat-ver{font-size:.83rem;color:var(--text-light);margin-bottom:18px}
.plat-btn{width:100%;padding:11px 0;border-radius:9px;font-size:.93rem;font-weight:600;
  background:var(--blue);color:#fff;transition:all var(--tr)}
.plat-btn:hover{background:var(--blue-dark)}
.plat-btn.outline{background:transparent;color:var(--blue);border:2px solid var(--blue)}
.plat-btn.outline:hover{background:var(--blue);color:#fff}

/* ─── REQUIREMENTS TABLE ─── */
.req-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.req-card{background:var(--bg-white);border-radius:var(--radius-lg);padding:28px;
  border:1px solid var(--border);box-shadow:var(--shadow)}
.req-title{font-size:1.05rem;font-weight:700;color:var(--text);margin-bottom:16px;
  display:flex;align-items:center;gap:8px}
.req-rows{display:flex;flex-direction:column;gap:0}
.req-row{display:flex;justify-content:space-between;padding:11px 0;
  border-bottom:1px solid var(--border);font-size:.93rem}
.req-row:last-child{border-bottom:none}
.req-key{color:var(--text-mid);font-weight:500}
.req-val{color:var(--text);font-weight:600;text-align:right;max-width:60%}

/* ─── COMPARISON TABLE ─── */
.cmp-wrap{overflow-x:auto}
.cmp{width:100%;border-collapse:collapse;background:var(--bg-white);
  border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow)}
.cmp th{padding:16px 20px;font-size:.9rem;font-weight:700;color:var(--text-mid);
  background:var(--bg);text-align:center;border-bottom:2px solid var(--border)}
.cmp th:first-child{text-align:left}
.cmp th.hl{background:rgba(26,111,196,.08);color:var(--blue)}
.cmp td{padding:14px 20px;border-bottom:1px solid var(--border);font-size:.93rem;color:var(--text-mid);text-align:center}
.cmp td:first-child{text-align:left;font-weight:600;color:var(--text)}
.cmp td.hl{background:rgba(26,111,196,.04)}
.cmp tr:last-child td{border-bottom:none}
.cmp .yes{color:#27ae60;font-weight:700}
.cmp .no{color:#e74c3c}
.cmp .part{color:#e67e22;font-weight:600}
.cmp tr:hover td{background:rgba(26,111,196,.03)}

/* ─── FAQ ─── */
.faq-list{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--bg-white);border:1px solid var(--border);
  border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;
  padding:20px 24px;background:none;font-size:1rem;font-weight:600;
  color:var(--text);text-align:left;gap:16px;transition:color var(--tr)}
.faq-q:hover{color:var(--blue)}
.faq-q svg{flex-shrink:0;color:var(--text-light);transition:transform var(--tr)}
.faq-item.open .faq-q svg{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease,padding .35s ease}
.faq-a-inner{padding:0 24px 20px;color:var(--text-mid);font-size:.96rem;line-height:1.75;border-top:1px solid var(--border)}
.faq-item.open .faq-a{max-height:400px}

/* ─── FOOTER ─── */
.footer{background:var(--bg-deep);padding:40px 28px;text-align:center}
.footer-logo{display:flex;align-items:center;gap:10px;justify-content:center;
  font-weight:700;font-size:1.1rem;color:#fff;margin-bottom:18px}
.footer-links{display:flex;gap:24px;justify-content:center;flex-wrap:wrap;margin-bottom:20px}
.footer-links a{color:rgba(255,255,255,.55);font-size:.9rem;transition:color var(--tr)}
.footer-links a:hover{color:#fff}
.footer-security{display:inline-flex;align-items:center;gap:8px;
  background:rgba(15,168,160,.12);border:1px solid rgba(15,168,160,.3);
  color:rgba(255,255,255,.75);border-radius:99px;padding:8px 22px;
  font-size:.85rem;margin-bottom:18px}
.footer-copy{color:rgba(255,255,255,.35);font-size:.83rem;line-height:1.8}

/* ─── NOTICE BOX (zh-cn page) ─── */
.notice{background:rgba(26,111,196,.07);border-left:4px solid var(--blue);
  border-radius:0 var(--radius) var(--radius) 0;padding:16px 20px;margin-bottom:24px;
  color:var(--text-mid);font-size:.95rem}
.notice strong{color:var(--blue)}

/* ─── ARTICLE CONTENT ─── */
.article-body{max-width:800px;margin:0 auto}
.article-body h2{font-size:1.4rem;font-weight:800;color:var(--text);
  margin:36px 0 14px;padding-bottom:8px;border-bottom:2px solid var(--border)}
.article-body h3{font-size:1.1rem;font-weight:700;color:var(--blue);margin:24px 0 10px}
.article-body p{color:var(--text-mid);margin-bottom:16px;font-size:.98rem;line-height:1.8}
.article-body ul{padding-left:20px;margin-bottom:16px}
.article-body ul li{color:var(--text-mid);margin-bottom:8px;font-size:.97rem}

/* ─── KEYWORD TAG CLOUD ─── */
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.kw-tag{background:rgba(26,111,196,.08);color:var(--blue);border:1px solid rgba(26,111,196,.2);
  border-radius:99px;padding:5px 16px;font-size:.85rem;font-weight:600}

/* ─── VERSION LOG ─── */
.vlog{max-width:720px;margin:0 auto;display:flex;flex-direction:column;gap:0}
.vlog-item{display:grid;grid-template-columns:120px 1fr;gap:0;position:relative}
.vlog-item::before{content:'';position:absolute;left:108px;top:8px;bottom:-8px;
  width:2px;background:var(--border)}
.vlog-item:last-child::before{display:none}
.vlog-dot{position:absolute;left:102px;top:8px;width:14px;height:14px;
  border-radius:50%;background:var(--blue);border:3px solid var(--bg-white);box-shadow:0 0 0 2px var(--blue)}
.vlog-date{font-size:.85rem;font-weight:700;color:var(--text-light);padding-top:6px;padding-right:20px}
.vlog-body{padding:0 0 32px 32px}
.vlog-ver{font-size:1rem;font-weight:700;color:var(--text);margin-bottom:8px}
.vlog-notes{list-style:none;display:flex;flex-direction:column;gap:6px}
.vlog-notes li{font-size:.91rem;color:var(--text-mid);display:flex;align-items:flex-start;gap:6px}
.vlog-notes li::before{content:'•';color:var(--blue);flex-shrink:0}

/* ─── RESPONSIVE ─── */
@media(max-width:960px){
  .card-grid,.testi-grid{grid-template-columns:repeat(2,1fr)}
  .tab-panel.active{grid-template-columns:1fr}
  .tab-visual{min-height:180px}
  .plat-grid{grid-template-columns:repeat(2,1fr)}
  .req-grid{grid-template-columns:1fr}
  .hero-mockup-inner{grid-template-columns:1fr 1fr}
  .stats-wrap{grid-template-columns:repeat(2,1fr)}
  .mock-card:last-child{display:none}
}
@media(max-width:640px){
  .navlist{display:none}
  .navlist.open{display:flex;flex-direction:column;position:absolute;
    top:66px;left:0;right:0;background:#fff;border-bottom:1px solid var(--border);
    padding:16px;gap:4px;z-index:900}
  .nav-toggle{display:block}
  .hero{padding:70px 20px 32px}
  .hero h1{font-size:1.8rem}
  .hero-btns{flex-direction:column;align-items:center}
  .section{padding:56px 20px}
  .card-grid,.testi-grid{grid-template-columns:1fr}
  .plat-grid{grid-template-columns:1fr 1fr}
  .cta-banner{padding:36px 24px}
  .cta-btns{flex-direction:column;align-items:center}
  .stats-wrap{grid-template-columns:repeat(2,1fr)}
  .hero-mockup-inner{grid-template-columns:1fr}
  .hero-mockup-inner .mock-card:nth-child(n+2){display:none}
  .vlog-item{grid-template-columns:1fr}
  .vlog-item::before{display:none}
  .vlog-dot{display:none}
  .vlog-date{padding-bottom:4px}
  .vlog-body{padding-left:0;padding-bottom:24px}
  .tabs-bar{width:100%}
  .tab-btn{flex:1;font-size:.85rem;padding:10px 12px}
}