/* ===== 无极画质助手官网 - 深紫光效主题 ===== */
*{margin:0;padding:0;box-sizing:border-box}
:root{--bg:#0a0a14;--bg-soft:rgba(255,255,255,0.03);--card-bg:rgba(255,255,255,0.04);--card-border:rgba(255,255,255,0.06);--purple:#a855f7;--purple-dark:#7c3aed;--purple-light:#c084fc;--purple-bg:rgba(168,85,247,0.08);--purple-border:rgba(168,85,247,0.15);--text:#eaeaea;--text-dim:#aaaaaa;--text-muted:#666666;--shadow-sm:0 1px 4px rgba(0,0,0,0.3);--shadow-md:0 4px 16px rgba(0,0,0,0.4);--shadow-lg:0 12px 40px rgba(0,0,0,0.5)}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden;background-image:radial-gradient(ellipse 80% 60% at 20% 0%,rgba(124,58,237,0.12) 0%,transparent 60%),radial-gradient(ellipse 60% 50% at 80% 100%,rgba(168,85,247,0.08) 0%,transparent 55%),radial-gradient(ellipse 50% 40% at 50% 50%,rgba(124,58,237,0.04) 0%,transparent 50%);background-attachment:fixed}
a{color:inherit;text-decoration:none}

/* ===== 导航 ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;padding:14px 40px;background:rgba(10,10,20,0.82);backdrop-filter:blur(20px);border-bottom:1px solid var(--card-border);display:grid;grid-template-columns:1fr auto 1fr;align-items:center;transition:box-shadow 0.3s}
.nav.scrolled{box-shadow:0 1px 20px rgba(124,58,237,0.08)}
.nav-logo{display:flex;align-items:center;gap:10px}
.nav-logo-icon{width:34px;height:34px;border-radius:10px;overflow:hidden;flex-shrink:0}
.nav-logo-icon img{width:100%;height:100%;object-fit:contain;border-radius:inherit}
.nav-logo-text{font-size:15px;font-weight:700;color:var(--text)}
.nav-links{display:flex;gap:32px}
.nav-links a{font-size:13px;color:var(--text-dim);font-weight:500;transition:color 0.2s;position:relative}
.nav-links a:hover,.nav-links a.active{color:var(--purple)}
.nav-links a.active::after{content:'';position:absolute;bottom:-6px;left:50%;transform:translateX(-50%);width:16px;height:2px;border-radius:1px;background:var(--purple)}
.nav-cta{padding:8px 20px;border-radius:10px;font-size:13px;font-weight:600;background:var(--purple);color:#fff;transition:all 0.3s;justify-self:end}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 4px 20px rgba(168,85,247,0.35)}

/* ===== 页脚 ===== */
.footer{padding:48px 24px;text-align:center;border-top:1px solid var(--card-border);background:rgba(255,255,255,0.02)}
.footer-brand{display:flex;align-items:center;justify-content:center;gap:10px;margin-bottom:12px}
.footer-brand span{font-weight:700;font-size:14px}
.footer-links{font-size:13px;color:var(--text-dim);margin-bottom:12px}
.footer-links a{color:var(--purple);margin:0 8px}
.footer-copy{font-size:12px;color:var(--text-muted)}

/* ===== 通用 ===== */
.section-header{text-align:center;margin-bottom:56px}
.section-header h2{font-size:28px;font-weight:800;margin-bottom:12px}
.section-header p{color:var(--text-dim);font-size:14px}
.btn-primary{padding:14px 36px;border-radius:12px;background:var(--purple);color:#fff;font-size:14px;font-weight:600;box-shadow:0 4px 20px rgba(168,85,247,0.3);transition:all 0.3s;display:inline-flex;align-items:center;gap:8px}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 32px rgba(168,85,247,0.4)}
.btn-ghost{padding:14px 28px;border-radius:12px;border:1px solid var(--card-border);background:rgba(255,255,255,0.04);color:var(--text);font-size:14px;font-weight:600;transition:all 0.3s}
.btn-ghost:hover{border-color:var(--purple-border);background:var(--purple-bg);color:var(--purple)}
.btn-ghost-highlight{color:#fff;border-color:var(--purple-border);background:rgba(168,85,247,0.12);font-weight:700}
.btn-ghost-highlight:hover{background:var(--purple);color:#fff;border-color:var(--purple);box-shadow:0 4px 20px rgba(168,85,247,0.3)}
.page-body{padding-top:62px;min-height:100vh}
/* ===== Hero ===== */
.hero{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:120px 24px 80px;position:relative;overflow:hidden;background:transparent}
.hero-glow{position:absolute;width:600px;height:600px;border-radius:50%;background:radial-gradient(circle,rgba(168,85,247,0.15),transparent 70%);top:50%;left:50%;transform:translate(-50%,-50%);animation:glow-pulse 6s ease-in-out infinite;pointer-events:none}
.hero-glow2{position:absolute;width:400px;height:400px;border-radius:50%;background:radial-gradient(circle,rgba(124,58,237,0.1),transparent 70%);top:30%;left:25%;animation:glow-pulse 8s ease-in-out infinite reverse;pointer-events:none}
.hero-grid{position:absolute;inset:0;background-image:none;pointer-events:none}
@keyframes glow-pulse{0%,100%{opacity:.5;transform:translate(-50%,-50%) scale(1)}50%{opacity:1;transform:translate(-50%,-50%) scale(1.1)}}
.hero-content{position:relative;z-index:1}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:7px 16px;border-radius:20px;background:var(--purple-bg);border:1px solid var(--purple-border);font-size:12px;color:var(--purple);margin-bottom:28px;font-weight:600}
.hero-badge::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--purple);animation:blink 2s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.3}}
.hero-title{font-size:clamp(40px,7vw,68px);font-weight:900;letter-spacing:-2px;line-height:1.1;margin-bottom:20px;min-height:1.2em;color:var(--text)}
.hero-accent{background:linear-gradient(135deg,#fff 20%,var(--purple));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.typing-cursor{display:inline-block;width:3px;height:0.85em;background:var(--purple);margin-left:4px;vertical-align:baseline;animation:cursor-blink 1s step-end infinite;border-radius:2px}
@keyframes cursor-blink{0%,100%{opacity:1}50%{opacity:0}}
.hero-sub{font-size:16px;color:var(--text-dim);max-width:480px;margin:0 auto 36px;line-height:1.8;font-weight:500}
.hero-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-sub.show,.hero-btns.show{opacity:1}
.hero-old-ver{display:inline-block;margin-top:14px;font-size:12px;color:var(--text-muted);transition:color 0.2s}
.hero-old-ver:hover{color:var(--purple-light)}

/* ===== Stats Bar ===== */
.stats-bar{padding:0 24px 48px;max-width:800px;margin:0 auto}
.stats-inner{display:flex;align-items:center;justify-content:center;gap:40px;padding:28px 48px;border-radius:16px;background:var(--card-bg);border:1px solid var(--card-border)}
.stat-item{text-align:center}
.stat-num{font-size:26px;font-weight:900;color:var(--purple);margin-bottom:2px}
.stat-label{font-size:12px;color:var(--text-muted);white-space:nowrap}
.stat-divider{width:1px;height:36px;background:var(--card-border)}
/* ===== Intro ===== */
.intro{padding:72px 24px;max-width:1000px;margin:0 auto}
.intro-header{text-align:center;margin-bottom:44px}
.intro-header h2{font-size:26px;font-weight:800;margin-bottom:12px}
.intro-header p{color:var(--text-dim);font-size:14px;line-height:1.8}
.intro-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.intro-card{padding:32px 28px;border-radius:16px;background:var(--card-bg);border:1px solid var(--card-border);transition:all 0.3s;box-shadow:var(--shadow-sm)}
.intro-card:hover{border-color:var(--purple-border);transform:translateY(-3px);box-shadow:var(--shadow-md)}
.intro-card-tag{display:inline-block;font-size:11px;font-weight:700;color:var(--purple);text-transform:uppercase;letter-spacing:1px;margin-bottom:12px;padding:4px 10px;border-radius:6px;background:var(--purple-bg)}
.intro-card h3{font-size:16px;font-weight:700;margin-bottom:8px}
.intro-card p{font-size:13px;color:var(--text-dim);line-height:1.7}

/* ===== Philosophy ===== */
.philosophy{padding:72px 24px;max-width:1000px;margin:0 auto}
.philosophy-header{text-align:center;margin-bottom:44px}
.philosophy-header h2{font-size:26px;font-weight:800;margin-bottom:12px;line-height:1.4}
.philosophy-header p{color:var(--text-dim);font-size:14px;line-height:1.8}
.phil-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.phil-card{padding:28px 24px;border-radius:16px;background:var(--card-bg);border:1px solid var(--card-border);transition:all 0.3s;box-shadow:var(--shadow-sm)}
.phil-card:hover{border-color:var(--purple-border);transform:translateY(-3px);box-shadow:var(--shadow-md)}
.phil-icon{width:44px;height:44px;border-radius:12px;background:var(--purple-bg);display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.phil-icon svg{width:22px;height:22px;color:var(--purple)}
.phil-tag{display:inline-block;font-size:11px;font-weight:700;color:var(--purple);text-transform:uppercase;letter-spacing:1px;margin-bottom:10px}
.phil-card h3{font-size:15px;font-weight:700;margin-bottom:6px}
.phil-card p{font-size:13px;color:var(--text-dim);line-height:1.7}
/* ===== 功能页 ===== */
.features,.support{padding:80px 24px 60px;max-width:1100px;margin:0 auto}
.changelog{padding:80px 24px 60px;max-width:800px;margin:0 auto}
.page-wrap{padding:80px 24px 60px;max-width:1100px;margin:0 auto}

/* Bento Grid */
.bento-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-auto-rows:auto;gap:20px}
.bento-card{border-radius:20px;background:var(--card-bg);border:1px solid var(--card-border);transition:all 0.3s;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;overflow:hidden}
.bento-card:hover{border-color:var(--purple-border);transform:translateY(-4px);box-shadow:0 8px 32px rgba(168,85,247,0.12)}
.bento-wide{grid-column:span 2;flex-direction:row}
.bento-wide .bento-body{flex:1;padding:32px 28px;display:flex;flex-direction:column}
.bento-wide .bento-preview{width:45%;min-height:200px;background:rgba(255,255,255,0.02);display:flex;align-items:center;justify-content:center;border-left:1px solid var(--card-border)}
.bento-wide .bento-preview img{width:100%;height:100%;object-fit:cover}
.bento-card:not(.bento-wide){padding:28px 24px}
.bento-card:not(.bento-wide) .bento-preview-sm{margin:16px -24px -28px;background:rgba(255,255,255,0.02);border-top:1px solid var(--card-border);height:120px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.bento-card:not(.bento-wide) .bento-preview-sm img{width:100%;height:100%;object-fit:cover}
.bento-icon{width:44px;height:44px;border-radius:12px;background:var(--purple-bg);display:flex;align-items:center;justify-content:center;margin-bottom:14px;flex-shrink:0}
.bento-icon svg{width:22px;height:22px;color:var(--purple)}
.bento-tag{display:inline-block;font-size:11px;font-weight:700;color:var(--purple);text-transform:uppercase;letter-spacing:1px;margin-bottom:8px;width:fit-content}
.bento-card h3{font-size:16px;font-weight:800;margin-bottom:6px;line-height:1.4}
.bento-card p{font-size:13px;color:var(--text-dim);line-height:1.7}
.bento-games{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.bento-games span{padding:5px 14px;border-radius:8px;background:rgba(255,255,255,0.04);border:1px solid var(--card-border);font-size:11px;font-weight:700;color:var(--text)}
/* ===== 更新日志 ===== */
.timeline{position:relative;padding-left:32px}
.timeline::before{content:'';position:absolute;left:7px;top:8px;bottom:8px;width:2px;background:linear-gradient(180deg,var(--purple),rgba(124,58,237,0.08))}
.timeline-item{position:relative;margin-bottom:40px}
.timeline-item:last-child{margin-bottom:0}
.timeline-dot{position:absolute;left:-32px;top:6px;width:16px;height:16px;border-radius:50%;background:var(--bg);border:2px solid var(--purple-light);box-shadow:0 0 0 4px var(--purple-bg)}
.timeline-item:first-child .timeline-dot{background:var(--purple);border-color:var(--purple);box-shadow:0 0 0 4px rgba(124,58,237,0.12)}
.timeline-ver{font-size:18px;font-weight:800;margin-bottom:4px;display:flex;align-items:center;gap:10px}
.timeline-ver .tag{font-size:10px;padding:3px 10px;border-radius:6px;background:var(--purple-bg);color:var(--purple);font-weight:600}
.timeline-date{font-size:12px;color:var(--text-muted);margin-bottom:12px}
.timeline-list{list-style:none;display:flex;flex-direction:column;gap:6px}
.timeline-list li{font-size:13px;color:var(--text-dim);display:flex;align-items:flex-start;gap:8px;line-height:1.6}
.timeline-list li::before{content:'';width:5px;height:5px;border-radius:50%;background:var(--purple-light);margin-top:7px;flex-shrink:0}

/* ===== 文档布局（支持与帮助） ===== */
.doc-page{min-height:100vh}
.doc-layout{display:grid;grid-template-columns:260px 1fr;min-height:calc(100vh - 62px);max-width:1200px;margin:0 auto}
.doc-sidebar{position:sticky;top:62px;height:calc(100vh - 62px);overflow-y:auto;padding:28px 0 28px 20px;border-right:1px solid var(--card-border)}
.doc-sidebar::-webkit-scrollbar{width:3px}
.doc-sidebar::-webkit-scrollbar-thumb{background:rgba(255,255,255,0.08);border-radius:3px}
.doc-sidebar-title{font-size:13px;font-weight:800;color:var(--text);margin-bottom:20px;padding:0 16px;letter-spacing:0.5px}
.doc-nav-group{margin-bottom:4px}
.doc-nav-head{display:flex;align-items:center;gap:6px;padding:9px 16px;font-size:13px;font-weight:700;color:var(--text);cursor:pointer;border-radius:8px;transition:background 0.15s;user-select:none}
.doc-nav-head:hover{background:rgba(255,255,255,0.04)}
.doc-nav-head svg{width:14px;height:14px;color:var(--text-muted);transition:transform 0.2s;flex-shrink:0}
.doc-nav-group.open>.doc-nav-head svg{transform:rotate(90deg)}
.doc-nav-list{list-style:none;max-height:0;overflow:hidden;transition:max-height 0.25s ease}
.doc-nav-group.open>.doc-nav-list{max-height:500px}
.doc-nav-list li{margin:0}
.doc-link{display:block;padding:7px 16px 7px 36px;font-size:12.5px;color:var(--text-dim);border-radius:6px;transition:all 0.15s;line-height:1.5}
.doc-link:hover{color:var(--purple-light);background:var(--purple-bg)}
.doc-link.active{color:var(--purple-light);background:var(--purple-bg);font-weight:600}

.doc-content{padding:40px 48px 60px;overflow-y:auto;max-width:800px}
.doc-article{display:none}
.doc-article.active{display:block}
.doc-article h2{font-size:22px;font-weight:800;margin-bottom:12px;color:var(--text)}
.doc-article>p{font-size:14px;color:var(--text-dim);line-height:1.8;margin-bottom:24px}
.doc-article h3{font-size:14px;font-weight:700;color:var(--purple-light);margin:28px 0 12px;letter-spacing:0.3px}
.doc-steps{display:flex;flex-direction:column;gap:8px;margin-bottom:16px;counter-reset:step}
.doc-step{counter-increment:step;display:flex;align-items:flex-start;gap:12px;padding:12px 16px;border-radius:10px;background:var(--card-bg);border:1px solid var(--card-border);font-size:13px;color:var(--text);line-height:1.6}
.doc-step::before{content:counter(step);width:24px;height:24px;border-radius:8px;background:var(--purple-bg);color:var(--purple);font-size:11px;font-weight:800;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.doc-note{padding:16px 20px;border-radius:10px;background:var(--purple-bg);border:1px solid var(--purple-border);margin-top:20px}
.doc-note strong{display:block;font-size:13px;font-weight:700;color:var(--text);margin-bottom:6px}
.doc-note p{font-size:12.5px;color:var(--text-dim);line-height:1.7;margin:0}

/* Pager */
.doc-pager{display:flex;justify-content:space-between;align-items:center;margin-top:40px;padding-top:24px;border-top:1px solid var(--card-border);gap:16px}
.doc-pager-prev,.doc-pager-next{font-size:13px;font-weight:600;color:var(--purple-light);padding:10px 16px;border-radius:10px;border:1px solid var(--purple-border);background:var(--purple-bg);transition:all 0.2s;max-width:48%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.doc-pager-prev:hover,.doc-pager-next:hover{background:var(--purple);color:#fff;border-color:var(--purple);box-shadow:0 0 20px rgba(168,85,247,0.2)}
.doc-pager-next{margin-left:auto}

/* 文档布局响应式 */
@media(max-width:900px){
.doc-layout{grid-template-columns:1fr}
.doc-sidebar{position:relative;top:0;height:auto;border-right:none;border-bottom:1px solid rgba(255,255,255,0.06);padding:20px 16px}
.doc-content{padding:28px 20px 48px}
}

/* ===== 下载卡片 ===== */
.download{padding:64px 24px;text-align:center}
.download-card{max-width:540px;margin:0 auto;padding:48px 40px;border-radius:24px;background:var(--card-bg);border:1px solid var(--card-border);position:relative;overflow:hidden}
.download-card h2{font-size:22px;font-weight:800;margin-bottom:10px}
.download-card>p{font-size:14px;color:var(--text-dim);margin-bottom:28px}
.btn-download{display:inline-flex;align-items:center;gap:10px;padding:16px 44px;border-radius:14px;background:var(--purple);color:#fff;font-size:15px;font-weight:700;box-shadow:0 4px 24px rgba(168,85,247,0.3);transition:all 0.3s}
.btn-download:hover{transform:translateY(-2px);box-shadow:0 8px 36px rgba(168,85,247,0.4)}
.download-info{margin-top:20px;font-size:12px;color:var(--text-muted);display:flex;gap:12px;justify-content:center}

/* ===== 动画 ===== */
.fade-up{opacity:0;transform:translateY(24px);transition:opacity 0.6s ease,transform 0.6s ease}
.fade-up.visible{opacity:1;transform:translateY(0)}

/* ===== 响应式 ===== */
@media(max-width:900px){.bento-grid{grid-template-columns:1fr}.bento-wide{grid-column:span 1;flex-direction:column}.bento-wide .bento-preview{width:100%;min-height:160px;border-left:none;border-top:1px solid var(--card-border)}.phil-grid{grid-template-columns:1fr}.intro-cards{grid-template-columns:1fr}}
@media(max-width:600px){.bento-grid{grid-template-columns:1fr}.bento-wide{grid-column:span 1}.nav{padding:12px 20px}.nav-links{gap:16px}.nav-cta{display:none}.download-card{padding:36px 24px;margin:0 16px}.hero-title{letter-spacing:-1px}.stats-inner{flex-direction:column;gap:16px;padding:24px 20px}.stat-divider{width:60px;height:1px}.phil-grid{grid-template-columns:1fr}}