/* ============================================================
   金山打字通 — 亮色主题 v3.0
   清新柔和 · 卡片布局 · 圆润大留白
   ============================================================ */

/* ---------- Tokens ---------- */
:root{
    --bg:           #f8f9fc;
    --bg2:          #eef1f6;
    --card:         #ffffff;
    --card-hover:   #f0f3ff;
    --border:       #e2e5ee;
    --border-hover: #c8cdf5;
    --text:         #1a1d2e;
    --text2:        #5a5f7a;
    --text3:        #989bb0;
    --accent:       #5664f5;
    --accent2:      #8b5cf6;
    --green:        #10b981;
    --grad-1:       linear-gradient(135deg,#5664f5,#8b5cf6);
    --grad-2:       linear-gradient(135deg,#5664f5,#06b6d4);
    --shadow-sm:    0 1px 3px rgba(0,0,0,0.04),0 2px 8px rgba(0,0,0,0.04);
    --shadow-md:    0 4px 24px rgba(0,0,0,0.06);
    --shadow-lg:    0 8px 40px rgba(0,0,0,0.08);
    --shadow-glow:  0 4px 24px rgba(86,100,245,0.15);
    --radius-sm:    8px;
    --radius:       14px;
    --radius-lg:    20px;
    --radius-xl:    28px;
    --t:            0.3s cubic-bezier(0.4,0,0.2,1);
    --t-slow:       0.5s cubic-bezier(0.4,0,0.2,1);
    --mw:           1140px;
}

/* ---------- Reset ---------- */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
    font-family:'Inter','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
    background:var(--bg);
    color:var(--text);
    line-height:1.6;
    overflow-x:hidden;
    -webkit-font-smoothing:antialiased;
}

/* ---------- Topbar ---------- */
.topbar{
    position:fixed;top:0;left:0;right:0;z-index:1000;height:64px;
    background:rgba(255,255,255,0.88);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    border-bottom:1px solid var(--border);
    transition:all var(--t);
}
.topbar.shadow{box-shadow:0 2px 24px rgba(0,0,0,0.06)}
.topbar-wrap{
    max-width:var(--mw);margin:0 auto;height:100%;
    display:flex;align-items:center;justify-content:space-between;
    padding:0 24px;
}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none}
.logo-mark{
    width:36px;height:36px;border-radius:var(--radius-sm);
    background:var(--grad-1);display:flex;align-items:center;justify-content:center;
    font-size:17px;color:#fff;box-shadow:0 4px 14px rgba(86,100,245,0.25);
}
.logo-word{font-size:17px;font-weight:700;color:var(--text)}
.logo-hl{
    background:var(--grad-1);-webkit-background-clip:text;
    -webkit-text-fill-color:transparent;background-clip:text;
}

.nav{display:flex;align-items:center;gap:2px}
.nav-link{
    color:var(--text2);text-decoration:none;padding:8px 16px;
    border-radius:100px;font-size:14px;font-weight:500;transition:all var(--t);
}
.nav-link:hover{color:var(--text);background:rgba(86,100,245,0.06)}
.nav-link.on{color:var(--accent);background:rgba(86,100,245,0.08);font-weight:600}
.nav-pill{
    margin-left:6px;background:var(--grad-1);color:#fff;
    padding:9px 20px;border-radius:100px;font-size:14px;font-weight:600;
    text-decoration:none;transition:all var(--t);
    box-shadow:0 4px 16px rgba(86,100,245,0.25);
}
.nav-pill:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(86,100,245,0.35)}

/* Hamburger */
.menu-btn{
    display:none;flex-direction:column;gap:5px;background:none;border:none;
    cursor:pointer;padding:4px;z-index:1001;
}
.menu-btn span{display:block;width:22px;height:2px;background:var(--text);border-radius:2px;transition:all var(--t)}
.menu-btn.on span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.menu-btn.on span:nth-child(2){opacity:0}
.menu-btn.on span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* ---------- Hero ---------- */
.hero{
    min-height:100vh;display:flex;align-items:center;
    padding:96px 24px 60px;
    background:
        radial-gradient(ellipse 600px 400px at 15% 20%,rgba(86,100,245,0.04),transparent 60%),
        radial-gradient(ellipse 500px 350px at 80% 70%,rgba(139,92,246,0.04),transparent 60%);
}
.hero-inner{
    max-width:var(--mw);margin:0 auto;width:100%;
    display:flex;align-items:center;gap:72px;
}
.hero-left{flex:1}
.hero-chip{
    display:inline-flex;align-items:center;gap:8px;
    padding:5px 16px;border-radius:100px;
    font-size:13px;font-weight:500;color:var(--accent);
    background:rgba(86,100,245,0.06);
    border:1px solid rgba(86,100,245,0.12);
    margin-bottom:24px;
    animation:fadeIn 0.7s ease-out;
}
.chip-blink{
    width:6px;height:6px;border-radius:50%;background:var(--accent);
    animation:blink 2s ease-in-out infinite;
}
@keyframes blink{
    0%,100%{box-shadow:0 0 0 0 rgba(86,100,245,0.5)}
    50%{box-shadow:0 0 0 8px rgba(86,100,245,0)}
}

.hero-title{
    font-size:clamp(36px,5vw,56px);font-weight:900;line-height:1.12;
    letter-spacing:-1px;margin-bottom:20px;
    animation:fadeIn 0.7s ease-out 0.1s both;
}
.tx-grad{
    background:var(--grad-1);-webkit-background-clip:text;
    -webkit-text-fill-color:transparent;background-clip:text;
}
.hero-p{
    font-size:17px;color:var(--text2);line-height:1.8;margin-bottom:36px;max-width:460px;
    animation:fadeIn 0.7s ease-out 0.2s both;
}
.hero-btns{
    display:flex;gap:12px;align-items:center;
    animation:fadeIn 0.7s ease-out 0.3s both;
}

/* Buttons */
.btn{
    display:inline-flex;align-items:center;justify-content:center;gap:10px;
    padding:14px 30px;border-radius:100px;font-size:15px;font-weight:600;
    text-decoration:none;transition:all 0.35s cubic-bezier(0.4,0,0.2,1);
    cursor:pointer;border:none;white-space:nowrap;
}
.btn-fill{
    background:var(--grad-1);color:#fff;
    box-shadow:0 6px 24px rgba(86,100,245,0.3);
}
.btn-fill:hover{
    transform:translateY(-3px);
    box-shadow:0 12px 36px rgba(86,100,245,0.4);
}
.btn-fill:active{transform:translateY(0) scale(0.98);transition:all 0.1s}

.btn-line{
    background:var(--card);color:var(--text);
    border:1.5px solid var(--border);
}
.btn-line:hover{
    border-color:var(--accent);background:rgba(86,100,245,0.03);
    transform:translateY(-3px);box-shadow:var(--shadow-glow);
}
.btn-xl{padding:18px 44px;font-size:17px;gap:12px}

/* Hero Keyboard */
.hero-right{flex-shrink:0;animation:fadeIn 0.7s ease-out 0.4s both}
.kb{
    background:var(--card);border:1px solid var(--border);
    border-radius:var(--radius-lg);padding:20px 16px;
    box-shadow:var(--shadow-md);
    transform:perspective(600px) rotateY(-4deg) rotateX(3deg);
    transition:transform var(--t-slow);
}
.kb:hover{transform:perspective(600px) rotateY(-1deg) rotateX(1deg)}
.kb-r{display:flex;gap:4px;margin-bottom:4px;justify-content:center}
.kb-r:last-child{margin-bottom:0}
.k{
    width:40px;height:40px;
    background:var(--bg2);border:1px solid var(--border);border-radius:6px;
    display:flex;align-items:center;justify-content:center;
    font-size:13px;font-weight:600;color:var(--text2);
    box-shadow:0 2px 0 rgba(0,0,0,0.08);
    transition:all 0.12s ease;user-select:none;
}
.k.on{
    background:var(--grad-1);color:#fff;border-color:transparent;
    box-shadow:0 0 18px rgba(86,100,245,0.35);
    transform:translateY(2px);
}
.k-sp{width:200px;font-size:10px;color:var(--text3)}

/* ---------- Count ---------- */
.count{
    padding:0 24px;margin-top:-32px;position:relative;z-index:2;
}
.count-row{
    max-width:720px;margin:0 auto;
    display:flex;align-items:center;justify-content:center;
    background:var(--card);border:1px solid var(--border);
    border-radius:var(--radius-lg);padding:8px;
    box-shadow:var(--shadow-sm);
}
.count-item{flex:1;text-align:center;padding:24px 16px}
.count-num{
    font-size:30px;font-weight:800;
    background:var(--grad-1);-webkit-background-clip:text;
    -webkit-text-fill-color:transparent;background-clip:text;
}
.count-num span{font-size:16px}
.count-txt{font-size:13px;color:var(--text2);margin-top:4px}
.count-sep{width:1px;height:44px;background:var(--border);flex-shrink:0}

/* ---------- Features ---------- */
.feat{padding:120px 24px}
.sec-hd{text-align:center;margin-bottom:64px}
.sec-chip{
    display:inline-block;padding:4px 14px;border-radius:100px;
    font-size:12px;font-weight:600;color:var(--accent);
    background:rgba(86,100,245,0.06);
    border:1px solid rgba(86,100,245,0.12);
    margin-bottom:14px;letter-spacing:1px;text-transform:uppercase;
}
.sec-hd h2{font-size:clamp(26px,3.5vw,38px);font-weight:800;margin-bottom:12px}
.sec-hd p{color:var(--text2);font-size:16px;max-width:440px;margin:0 auto}

.feat-grid{
    max-width:var(--mw);margin:0 auto;
    display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
}
.f-card{
    background:var(--card);border:1px solid var(--border);
    border-radius:var(--radius-lg);padding:36px 28px;
    transition:all var(--t);
}
.f-card:hover{
    transform:translateY(-6px);
    border-color:var(--border-hover);
    box-shadow:var(--shadow-glow);
}
.f-ico{
    width:50px;height:50px;border-radius:var(--radius);
    background:rgba(86,100,245,0.08);color:var(--accent);
    display:flex;align-items:center;justify-content:center;
    margin-bottom:18px;transition:all var(--t);
}
.f-card:hover .f-ico{
    background:var(--grad-1);color:#fff;
    box-shadow:0 8px 22px rgba(86,100,245,0.25);
}
.f-card h3{font-size:18px;font-weight:700;margin-bottom:10px}
.f-card p{font-size:14px;color:var(--text2);line-height:1.7}

/* ---------- Spotlight ---------- */
.spot{padding:0 24px 120px}
.spot-wrap{
    max-width:var(--mw);margin:0 auto;
    display:flex;align-items:center;gap:72px;
}
.spot-left{flex:1}
.spot-left h2{font-size:clamp(24px,3vw,34px);font-weight:800;margin-bottom:28px}
.spot-list{list-style:none;display:flex;flex-direction:column;gap:16px}
.spot-list li{
    display:flex;align-items:center;gap:12px;
    color:var(--text2);font-size:15px;
}
.spot-list li svg{color:var(--green);flex-shrink:0}
.spot-right{flex:1;display:flex;justify-content:center}
.chart-card{
    background:var(--card);border:1px solid var(--border);
    border-radius:var(--radius-lg);padding:28px 24px;
    width:100%;max-width:320px;box-shadow:var(--shadow-sm);
}
.chart-bars{
    display:flex;align-items:flex-end;gap:10px;height:140px;padding-bottom:4px;
}
.bar{
    flex:1;border-radius:8px 8px 0 0;
    background:linear-gradient(180deg,rgba(86,100,245,0.35),rgba(86,100,245,0.06));
    position:relative;transition:all var(--t-slow);min-height:16px;
}
.bar.hot{background:var(--grad-1);box-shadow:0 4px 18px rgba(86,100,245,0.25)}
.bar span{
    position:absolute;bottom:-20px;left:50%;transform:translateX(-50%);
    font-size:11px;color:var(--text3);white-space:nowrap;
}
.chart-label{text-align:center;font-size:12px;color:var(--text3);margin-top:26px}

/* ---------- Download CTA ---------- */
.down{padding:0 24px 100px}
.down-card{
    max-width:640px;margin:0 auto;
    background:var(--card);border:1px solid var(--border);
    border-radius:var(--radius-xl);padding:60px 36px;text-align:center;
    box-shadow:var(--shadow-sm);
    position:relative;overflow:hidden;
}
.down-card::before{
    content:'';position:absolute;top:-120px;left:50%;transform:translateX(-50%);
    width:360px;height:360px;border-radius:50%;
    background:radial-gradient(circle,rgba(86,100,245,0.05),transparent 70%);
    pointer-events:none;
}
.down-card h2{font-size:30px;font-weight:800;margin-bottom:12px;position:relative}
.down-card p{color:var(--text2);font-size:16px;margin-bottom:32px;position:relative}

/* ---------- Footer ---------- */
.foot{
    border-top:1px solid var(--border);
    padding:36px 24px 20px;background:var(--card);
}
.foot-inner{
    max-width:var(--mw);margin:0 auto;
    display:flex;align-items:center;justify-content:space-between;
    margin-bottom:20px;
}
.foot-brand{display:flex;align-items:center;gap:10px}
.foot-nav{display:flex;gap:20px}
.foot-nav a{color:var(--text2);text-decoration:none;font-size:13px;transition:color var(--t)}
.foot-nav a:hover{color:var(--accent)}
.foot-copy{
    max-width:var(--mw);margin:0 auto;text-align:center;
    padding-top:18px;border-top:1px solid var(--border);
    color:var(--text3);font-size:12px;
}

/* ---------- Download Page ---------- */
.page-dl{
    min-height:100vh;display:flex;align-items:center;justify-content:center;
    padding:120px 24px 60px;
}
.dl-card{
    background:var(--card);border:1px solid var(--border);
    border-radius:var(--radius-xl);padding:44px 36px;
    max-width:420px;width:100%;text-align:center;
    box-shadow:var(--shadow-md);
}
.dl-icon{
    width:72px;height:72px;border-radius:18px;
    background:var(--grad-1);display:flex;align-items:center;justify-content:center;
    font-size:32px;color:#fff;margin:0 auto 20px;
    box-shadow:0 10px 30px rgba(86,100,245,0.3);
}
.dl-title{font-size:28px;font-weight:800;margin-bottom:4px}
.dl-sub{color:var(--text2);font-size:14px;margin-bottom:28px}
.dl-info{
    background:var(--bg2);border-radius:var(--radius);
    padding:16px;margin-bottom:24px;text-align:left;
}
.dl-row{
    display:flex;justify-content:space-between;align-items:center;
    padding:9px 0;border-bottom:1px solid var(--border);
}
.dl-row:last-child{border-bottom:none}
.dl-lbl{color:var(--text3);font-size:13px}
.dl-val{color:var(--text);font-weight:600;font-size:13px}
.dl-val.hi{color:var(--accent)}
.dl-btn{width:100%;justify-content:center;font-size:16px;padding:16px;margin-bottom:16px}
.dl-back{color:var(--text3);text-decoration:none;font-size:13px;transition:color var(--t)}
.dl-back:hover{color:var(--accent)}

/* ---------- 404 Page ---------- */
.page-err{
    min-height:100vh;display:flex;align-items:center;justify-content:center;
    padding:120px 24px 60px;
}
.err-content{text-align:center}
.err-num{
    font-size:clamp(80px,14vw,150px);font-weight:900;line-height:1;
    background:var(--grad-1);-webkit-background-clip:text;
    -webkit-text-fill-color:transparent;background-clip:text;
    letter-spacing:-3px;margin-bottom:8px;
    animation:shake 3s ease-in-out infinite;
}
@keyframes shake{
    0%,100%{transform:translate(0)}
    20%{transform:translate(-2px,1px)}
    40%{transform:translate(2px,-1px)}
    60%{transform:translate(-1px,-1px)}
    80%{transform:translate(1px,1px)}
}
.err-title{font-size:24px;font-weight:700;margin-bottom:8px}
.err-desc{color:var(--text2);font-size:15px;margin-bottom:32px}
.err-btns{display:flex;gap:12px;justify-content:center}

/* ---------- Animations ---------- */
@keyframes fadeIn{
    from{opacity:0;transform:translateY(24px)}
    to{opacity:1;transform:translateY(0)}
}
.fade{opacity:0;transform:translateY(24px);transition:all var(--t-slow)}
.fade.in{opacity:1;transform:translateY(0)}

/* ---------- Responsive ---------- */
@media(max-width:1024px){
    .feat-grid{grid-template-columns:repeat(2,1fr)}
    .hero-inner{flex-direction:column;text-align:center;gap:44px}
    .hero-p{max-width:100%}
    .hero-btns{justify-content:center}
    .hero-right{display:none}
    .spot-wrap{flex-direction:column;gap:44px}
    .spot-left h2{text-align:center}
}

@media(max-width:768px){
    .menu-btn{display:flex}
    .nav{
        position:fixed;top:0;right:-100%;width:250px;height:100vh;
        flex-direction:column;align-items:stretch;gap:2px;
        background:rgba(255,255,255,0.97);backdrop-filter:blur(20px);
        -webkit-backdrop-filter:blur(20px);
        border-left:1px solid var(--border);
        padding:84px 20px 28px;
        transition:right var(--t);z-index:1000;
    }
    .nav.open{right:0}
    .nav-pill{margin-left:0;text-align:center}
    .feat-grid{grid-template-columns:1fr}
    .count-row{flex-direction:column;padding:20px}
    .count-sep{width:80%;height:1px}
    .down-card{padding:44px 24px}
    .down-card h2{font-size:24px}
    .dl-card{padding:36px 24px}
    .err-btns{flex-direction:column;align-items:center}
}

@media(max-width:480px){
    .hero-title{font-size:30px}
    .hero-btns{flex-direction:column;width:100%}
    .hero-btns .btn{width:100%}
    .feat{padding:80px 16px}
    .count{padding:0 16px;margin-top:-16px}
    .down{padding:0 16px 60px}
    .spot{padding:0 16px 80px}
    .foot-inner{flex-direction:column;gap:14px}
}