/* ============================================================
   金山打字通 — 全新设计系统 v2.0
   现代简约 · 大留白 · 微动效 · 暗色主题
   ============================================================ */

/* ---------- Design Tokens ---------- */
:root {
    --c-bg:            #08090d;
    --c-surface:       #0e1018;
    --c-surface2:      #141620;
    --c-surface3:      #1a1d2a;
    --c-border:        rgba(255,255,255,0.06);
    --c-border-hover:  rgba(255,255,255,0.12);
    --c-text:          #eeeff4;
    --c-text2:         #8b8fa8;
    --c-text3:         #555870;
    --c-accent:        #5b8af7;
    --c-accent2:       #a378f5;
    --c-accent-glow:   rgba(91,138,247,0.25);
    --c-success:       #34d399;
    --gradient-1:      linear-gradient(135deg, #5b8af7, #7c5cfc, #a378f5);
    --gradient-2:      linear-gradient(135deg, #5b8af7, #06b6d4);
    --radius-sm:       8px;
    --radius:          14px;
    --radius-lg:       22px;
    --radius-xl:       32px;
    --shadow-card:     0 1px 2px rgba(0,0,0,0.4), 0 8px 32px rgba(0,0,0,0.3);
    --shadow-glow:     0 0 60px rgba(91,138,247,0.12);
    --transition:      0.3s cubic-bezier(0.4,0,0.2,1);
    --transition-slow: 0.6s cubic-bezier(0.4,0,0.2,1);
    --max-width:       1200px;
}

/* ---------- Reset ---------- */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
    font-family:'Inter','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
    background:var(--c-bg);
    color:var(--c-text);
    line-height:1.6;
    overflow-x:hidden;
    -webkit-font-smoothing:antialiased;
    -moz-osx-font-smoothing:grayscale;
    min-height:100vh;
}

/* ---------- Background Texture ---------- */
body::before{
    content:'';
    position:fixed;inset:0;pointer-events:none;z-index:0;
    background:
        radial-gradient(ellipse 700px 500px at 20% 10%, rgba(91,138,247,0.04), transparent 70%),
        radial-gradient(ellipse 500px 400px at 75% 50%, rgba(163,120,245,0.04), transparent 70%),
        radial-gradient(ellipse 400px 350px at 50% 85%, rgba(6,182,212,0.03), transparent 70%);
    background-size:200% 200%;
    animation:bgDrift 25s ease-in-out infinite;
}
@keyframes bgDrift{
    0%,100%{background-position:0% 0%}
    33%{background-position:2% 2%}
    66%{background-position:-1% -1%}
}

/* ---------- Navbar ---------- */
.navbar{
    position:fixed;top:0;left:0;right:0;z-index:1000;
    height:68px;
    background:rgba(8,9,13,0.82);
    backdrop-filter:blur(24px) saturate(180%);
    -webkit-backdrop-filter:blur(24px) saturate(180%);
    border-bottom:1px solid var(--c-border);
    transition:all var(--transition);
}
.navbar.scrolled{box-shadow:0 4px 40px rgba(0,0,0,0.5);border-bottom-color:rgba(255,255,255,0.1)}
.nav-container{
    max-width:var(--max-width);margin:0 auto;height:100%;
    display:flex;align-items:center;justify-content:space-between;
    padding:0 28px;
}
.brand{
    display:flex;align-items:center;gap:10px;text-decoration:none;
}
.brand-icon{
    width:38px;height:38px;border-radius:var(--radius-sm);
    background:var(--gradient-1);display:flex;align-items:center;justify-content:center;
    font-size:18px;color:#fff;box-shadow:0 4px 18px rgba(91,138,247,0.35);
}
.brand-name{font-size:17px;font-weight:700;color:var(--c-text);letter-spacing:-0.2px}
.brand-accent{
    background:var(--gradient-1);-webkit-background-clip:text;
    -webkit-text-fill-color:transparent;background-clip:text;
}

.nav-menu{display:flex;align-items:center;gap:4px}
.nav-item{
    color:var(--c-text2);text-decoration:none;padding:8px 18px;
    border-radius:100px;font-size:14px;font-weight:500;
    transition:all var(--transition);
}
.nav-item:hover{color:var(--c-text);background:rgba(255,255,255,0.04)}
.nav-item.active{color:#fff;background:rgba(91,138,247,0.15)}

.nav-cta{
    margin-left:8px;
    background:var(--gradient-1);color:#fff;
    padding:9px 22px;border-radius:100px;font-size:14px;font-weight:600;
    text-decoration:none;transition:all var(--transition);
    box-shadow:0 4px 20px rgba(91,138,247,0.3);
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(91,138,247,0.45)}

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

/* ---------- Hero ---------- */
.hero{
    position:relative;z-index:1;
    min-height:100vh;display:flex;align-items:center;
    padding:100px 28px 60px;
    overflow:hidden;
}
.hero-bg{position:absolute;inset:0;pointer-events:none}
.hero-glow{
    position:absolute;border-radius:50%;filter:blur(100px);opacity:0.12;
}
.glow-1{width:600px;height:600px;background:var(--c-accent);top:-200px;left:-100px}
.glow-2{width:500px;height:500px;background:var(--c-accent2);bottom:-150px;right:-100px}
.hero-grid{
    position:absolute;inset:0;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px,transparent 1px),
        linear-gradient(90deg,rgba(255,255,255,0.02) 1px,transparent 1px);
    background-size:64px 64px;
    mask-image:radial-gradient(ellipse at center,black 30%,transparent 70%);
    -webkit-mask-image:radial-gradient(ellipse at center,black 30%,transparent 70%);
}

.hero-content{
    max-width:var(--max-width);margin:0 auto;width:100%;
    display:flex;align-items:center;gap:80px;
}
.hero-tag{
    display:inline-flex;align-items:center;gap:8px;
    padding:6px 18px;border-radius:100px;
    font-size:13px;font-weight:500;color:var(--c-accent);
    background:rgba(91,138,247,0.08);
    border:1px solid rgba(91,138,247,0.15);
    margin-bottom:28px;
    animation:fadeUp 0.8s ease-out;
}
.tag-dot{
    width:6px;height:6px;border-radius:50%;background:var(--c-accent);
    animation:pulse 2s ease-in-out infinite;
}
@keyframes pulse{
    0%,100%{box-shadow:0 0 0 0 rgba(91,138,247,0.6)}
    50%{box-shadow:0 0 0 8px rgba(91,138,247,0)}
}

.hero-heading{
    font-size:clamp(38px,5.5vw,60px);font-weight:900;
    line-height:1.1;letter-spacing:-1.5px;margin-bottom:22px;
    animation:fadeUp 0.8s ease-out 0.1s both;
}
.text-gradient{
    background:var(--gradient-1);-webkit-background-clip:text;
    -webkit-text-fill-color:transparent;background-clip:text;
}

.hero-subtitle{
    font-size:17px;color:var(--c-text2);line-height:1.8;
    margin-bottom:36px;max-width:480px;
    animation:fadeUp 0.8s ease-out 0.2s both;
}
.hero-actions{
    display:flex;gap:14px;align-items:center;
    animation:fadeUp 0.8s ease-out 0.3s both;
}

/* Buttons */
.btn{
    display:inline-flex;align-items:center;justify-content:center;gap:10px;
    padding:14px 32px;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;
    position:relative;overflow:hidden;letter-spacing:0.2px;
}
.btn-accent{
    background:var(--gradient-1);color:#fff;
    box-shadow:0 8px 32px rgba(91,138,247,0.35),0 0 0 0 rgba(91,138,247,0.4);
    animation:btnPulse 3s ease-in-out infinite;
}
@keyframes btnPulse{
    0%,100%{box-shadow:0 8px 32px rgba(91,138,247,0.35),0 0 0 0 rgba(91,138,247,0.4)}
    50%{box-shadow:0 8px 32px rgba(91,138,247,0.35),0 0 0 14px rgba(91,138,247,0)}
}
.btn-accent::after{
    content:'';position:absolute;inset:0;
    background:linear-gradient(90deg,transparent,rgba(255,255,255,0.15),transparent);
    transform:translateX(-100%);transition:transform 0.6s;
}
.btn-accent:hover::after{transform:translateX(100%)}
.btn-accent:hover{transform:translateY(-3px) scale(1.02);animation:none;
    box-shadow:0 14px 44px rgba(91,138,247,0.5)}
.btn-accent:active{transform:translateY(0) scale(0.98);transition:all 0.1s}

.btn-ghost{
    background:rgba(255,255,255,0.03);color:var(--c-text);
    border:1px solid rgba(255,255,255,0.1);
}
.btn-ghost:hover{
    background:rgba(255,255,255,0.06);border-color:rgba(124,92,252,0.4);
    transform:translateY(-3px);box-shadow:0 8px 32px rgba(91,138,247,0.1);
}
.btn-xl{padding:18px 44px;font-size:17px;gap:12px}

/* Hero Visual - Keyboard */
.hero-visual{flex-shrink:0;animation:fadeUp 0.8s ease-out 0.4s both}
.keyboard-frame{
    background:var(--c-surface2);border:1px solid var(--c-border);
    border-radius:var(--radius-lg);padding:22px 18px;
    transform:perspective(800px) rotateY(-6deg) rotateX(5deg);
    box-shadow:0 24px 72px rgba(0,0,0,0.5),0 0 80px var(--c-accent-glow);
    transition:transform var(--transition-slow);
}
.keyboard-frame:hover{transform:perspective(800px) rotateY(-2deg) rotateX(2deg)}
.kb-row{display:flex;gap:5px;margin-bottom:5px;justify-content:center}
.kb-row:last-child{margin-bottom:0}
.kb-key{
    width:42px;height:42px;
    background:linear-gradient(180deg,#1d1f2c 0%,#11131c 100%);
    border:1px solid rgba(255,255,255,0.06);border-radius:7px;
    display:flex;align-items:center;justify-content:center;
    font-size:13px;font-weight:600;color:var(--c-text2);
    box-shadow:0 3px 0 rgba(0,0,0,0.4),0 1px 3px rgba(0,0,0,0.3);
    transition:all 0.15s ease;user-select:none;
}
.kb-key.active{
    background:var(--gradient-1);color:#fff;
    border-color:rgba(255,255,255,0.2);
    box-shadow:0 0 0 rgba(0,0,0,0),0 0 22px rgba(91,138,247,0.5);
    transform:translateY(2px);
}
.kb-key.kb-space{width:220px;font-size:10px;color:var(--c-text3)}

/* ---------- Stats ---------- */
.stats{
    position:relative;z-index:1;
    padding:0 28px;margin-top:-40px;
}
.stats-row{
    max-width:780px;margin:0 auto;
    display:flex;align-items:center;justify-content:center;gap:0;
    background:var(--c-surface);
    border:1px solid var(--c-border);
    border-radius:var(--radius-lg);
    padding:8px;
    backdrop-filter:blur(20px);
    -webkit-backdrop-filter:blur(20px);
}
.stat-item{
    flex:1;text-align:center;padding:28px 20px;
    transition:all var(--transition);
}
.stat-icon{font-size:26px;margin-bottom:8px}
.stat-value{
    font-size:32px;font-weight:800;letter-spacing:-0.5px;
    background:var(--gradient-1);-webkit-background-clip:text;
    -webkit-text-fill-color:transparent;background-clip:text;
}
.stat-unit{font-size:18px}
.stat-desc{font-size:13px;color:var(--c-text2);margin-top:4px}
.stat-divider{width:1px;height:50px;background:var(--c-border);flex-shrink:0}

/* ---------- Features ---------- */
.features{
    position:relative;z-index:1;
    padding:120px 28px;
}
.section-head{text-align:center;margin-bottom:72px}
.section-badge{
    display:inline-block;padding:5px 16px;border-radius:100px;
    font-size:12px;font-weight:600;color:var(--c-accent);
    background:rgba(91,138,247,0.08);
    border:1px solid rgba(91,138,247,0.15);
    margin-bottom:16px;letter-spacing:1px;text-transform:uppercase;
}
.section-title{
    font-size:clamp(28px,3.5vw,40px);font-weight:800;
    letter-spacing:-0.5px;margin-bottom:14px;
}
.section-desc{color:var(--c-text2);font-size:16px;max-width:460px;margin:0 auto}

.features-grid{
    max-width:var(--max-width);margin:0 auto;
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:18px;
}
.feature-card{
    background:var(--c-surface);
    border:1px solid var(--c-border);
    border-radius:var(--radius-lg);
    padding:32px 26px;
    transition:all var(--transition);
    position:relative;overflow:hidden;
}
.feature-card:hover{
    transform:translateY(-6px);
    border-color:rgba(91,138,247,0.25);
    box-shadow:var(--shadow-glow);
    background:var(--c-surface2);
}
.fc-icon{
    width:52px;height:52px;border-radius:var(--radius);
    background:rgba(91,138,247,0.08);
    display:flex;align-items:center;justify-content:center;
    color:var(--c-accent);margin-bottom:18px;
    transition:all var(--transition);
}
.feature-card:hover .fc-icon{
    background:var(--gradient-1);color:#fff;
    box-shadow:0 8px 24px rgba(91,138,247,0.3);
}
.feature-card h3{font-size:18px;font-weight:700;margin-bottom:10px}
.feature-card p{font-size:13.5px;color:var(--c-text2);line-height:1.7;margin-bottom:16px}
.fc-tag{
    display:inline-block;padding:3px 10px;border-radius:100px;
    font-size:11px;font-weight:600;
    background:rgba(91,138,247,0.08);color:var(--c-accent);
}
.fc-tag-hot{background:rgba(239,68,68,0.1);color:#f87171}

/* ---------- Showcase ---------- */
.showcase{
    position:relative;z-index:1;
    padding:0 28px 120px;
}
.showcase-inner{
    max-width:var(--max-width);margin:0 auto;
    display:flex;align-items:center;gap:80px;
}
.showcase-text{flex:1}
.showcase-text h2{font-size:clamp(26px,3vw,36px);font-weight:800;margin-bottom:32px;letter-spacing:-0.5px}
.showcase-list{list-style:none;display:flex;flex-direction:column;gap:18px}
.showcase-list li{
    display:flex;align-items:center;gap:14px;
    color:var(--c-text2);font-size:15px;
}
.showcase-list li svg{color:var(--c-success);flex-shrink:0}

.showcase-image{flex:1;display:flex;justify-content:center}
.si-card{
    background:var(--c-surface);
    border:1px solid var(--c-border);
    border-radius:var(--radius-lg);
    padding:28px 24px;width:100%;max-width:340px;
}
.si-chart{
    display:flex;align-items:flex-end;gap:12px;height:160px;
    padding-bottom:4px;
}
.si-bar{
    flex:1;border-radius:8px 8px 0 0;
    background:linear-gradient(180deg,rgba(91,138,247,0.3),rgba(91,138,247,0.05));
    position:relative;transition:all var(--transition-slow);
    min-height:20px;
}
.si-bar.active{background:var(--gradient-1);box-shadow:0 4px 20px rgba(91,138,247,0.3)}
.si-bar span{
    position:absolute;bottom:-22px;left:50%;transform:translateX(-50%);
    font-size:11px;color:var(--c-text3);white-space:nowrap;
}
.si-label{text-align:center;font-size:12px;color:var(--c-text3);margin-top:28px}

/* ---------- CTA ---------- */
.cta{
    position:relative;z-index:1;
    padding:0 28px 100px;
}
.cta-card{
    max-width:700px;margin:0 auto;
    background:var(--c-surface);
    border:1px solid var(--c-border);
    border-radius:var(--radius-xl);
    padding:64px 40px;text-align:center;
    position:relative;overflow:hidden;
}
.cta-glow{
    position:absolute;top:-180px;left:50%;transform:translateX(-50%);
    width:450px;height:450px;border-radius:50%;
    background:radial-gradient(circle,rgba(91,138,247,0.08),transparent 70%);
    pointer-events:none;
}
.cta-card h2{font-size:34px;font-weight:800;margin-bottom:14px;position:relative}
.cta-card p{color:var(--c-text2);font-size:16px;margin-bottom:32px;position:relative}

/* ---------- Footer ---------- */
.footer{
    position:relative;z-index:1;
    border-top:1px solid var(--c-border);
    padding:40px 28px 24px;
}
.footer-inner{
    max-width:var(--max-width);margin:0 auto;
    display:flex;align-items:center;justify-content:space-between;
    margin-bottom:24px;
}
.footer-brand{
    display:flex;align-items:center;gap:10px;
    font-size:16px;font-weight:700;color:var(--c-text);
}
.footer-links{display:flex;gap:24px}
.footer-links a{
    color:var(--c-text2);text-decoration:none;font-size:13px;
    transition:color var(--transition);
}
.footer-links a:hover{color:var(--c-accent)}
.footer-bottom{
    max-width:var(--max-width);margin:0 auto;text-align:center;
    padding-top:20px;border-top:1px solid var(--c-border);
    color:var(--c-text3);font-size:12px;
}

/* ---------- Download Page ---------- */
.download-page{
    min-height:100vh;display:flex;align-items:center;justify-content:center;
    position:relative;z-index:1;padding:120px 28px 60px;
}
.dl-card{
    background:var(--c-surface);border:1px solid var(--c-border);
    border-radius:var(--radius-xl);padding:48px 40px;
    max-width:440px;width:100%;text-align:center;
    box-shadow:var(--shadow-card);position:relative;
}
.dl-card::before{
    content:'';position:absolute;top:-1px;left:20%;right:20%;height:1px;
    background:var(--gradient-2);
}
.dl-icon-big{
    width:76px;height:76px;border-radius:20px;
    background:var(--gradient-1);display:flex;align-items:center;justify-content:center;
    font-size:34px;color:#fff;margin:0 auto 22px;
    box-shadow:0 12px 36px rgba(91,138,247,0.35);
}
.dl-title{font-size:30px;font-weight:800;margin-bottom:6px}
.dl-subtitle{color:var(--c-text2);font-size:14px;margin-bottom:32px}
.dl-info{
    background:var(--c-surface2);border-radius:var(--radius);
    padding:18px;margin-bottom:28px;text-align:left;
}
.dl-row{
    display:flex;justify-content:space-between;align-items:center;
    padding:10px 0;border-bottom:1px solid var(--c-border);
}
.dl-row:last-child{border-bottom:none}
.dl-label{color:var(--c-text3);font-size:13px}
.dl-value{color:var(--c-text);font-weight:600;font-size:13px}
.dl-value.accent{color:var(--c-accent)}
.dl-btn{width:100%;justify-content:center;font-size:16px;padding:17px;margin-bottom:18px}
.dl-back{
    color:var(--c-text3);text-decoration:none;font-size:13px;
    transition:color var(--transition);
}
.dl-back:hover{color:var(--c-accent)}

/* ---------- 404 Page ---------- */
.error-page{
    min-height:100vh;display:flex;align-items:center;justify-content:center;
    position:relative;z-index:1;padding:120px 28px 60px;
}
.error-content{text-align:center}
.error-code{
    font-size:clamp(90px,16vw,160px);font-weight:900;line-height:1;
    background:var(--gradient-1);-webkit-background-clip:text;
    -webkit-text-fill-color:transparent;background-clip:text;
    letter-spacing:-4px;margin-bottom:8px;
    animation:glitch 3s ease-in-out infinite;
}
@keyframes glitch{
    0%,100%{transform:translate(0)}
    20%{transform:translate(-3px,2px)}
    40%{transform:translate(3px,-1px)}
    60%{transform:translate(-2px,-2px)}
    80%{transform:translate(2px,1px)}
}
.error-title{font-size:26px;font-weight:700;margin-bottom:10px}
.error-desc{color:var(--c-text2);font-size:15px;margin-bottom:36px}
.error-actions{display:flex;gap:14px;justify-content:center}

/* ---------- Animations ---------- */
@keyframes fadeUp{
    from{opacity:0;transform:translateY(28px)}
    to{opacity:1;transform:translateY(0)}
}
.reveal{opacity:0;transform:translateY(28px);transition:all var(--transition-slow)}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ---------- Responsive ---------- */
@media(max-width:1024px){
    .features-grid{grid-template-columns:repeat(2,1fr)}
    .hero-content{flex-direction:column;text-align:center;gap:48px}
    .hero-subtitle{max-width:100%}
    .hero-actions{justify-content:center}
    .hero-visual{display:none}
    .showcase-inner{flex-direction:column;gap:48px}
    .showcase-text h2{text-align:center}
}

@media(max-width:768px){
    .hamburger{display:flex}
    .nav-menu{
        position:fixed;top:0;right:-100%;width:260px;height:100vh;
        flex-direction:column;align-items:stretch;gap:4px;
        background:rgba(14,16,24,0.97);backdrop-filter:blur(30px);
        -webkit-backdrop-filter:blur(30px);
        border-left:1px solid var(--c-border);
        padding:90px 24px 32px;
        transition:right var(--transition);
        z-index:1000;
    }
    .nav-menu.open{right:0}
    .nav-cta{margin-left:0;text-align:center}
    .features-grid{grid-template-columns:1fr}
    .stats-row{flex-direction:column;padding:24px}
    .stat-divider{width:80%;height:1px}
    .section-title{font-size:28px}
    .cta-card{padding:48px 24px}
    .cta-card h2{font-size:26px}
    .dl-card{padding:36px 24px}
    .error-actions{flex-direction:column;align-items:center}
}

@media(max-width:480px){
    .navbar{padding:0 12px}
    .hero-heading{font-size:32px}
    .hero-actions{flex-direction:column;width:100%}
    .hero-actions .btn{width:100%}
    .features{padding:80px 16px}
    .stats{padding:0 16px;margin-top:-20px}
    .cta{padding:0 16px 60px}
    .footer-inner{flex-direction:column;gap:16px}
}