/* ===== VeraCrypt 中文站 - 全局样式 ===== */
:root {
  --c-primary: #1a56db;
  --c-primary-dark: #1e40af;
  --c-primary-light: #3b82f6;
  --c-accent: #059669;
  --c-accent-light: #10b981;
  --c-bg: #f1f5f9;
  --c-surface: #ffffff;
  --c-text: #1e293b;
  --c-text-secondary: #64748b;
  --c-border: #e2e8f0;
  --c-danger: #dc2626;
  --c-warning: #f59e0b;
  --radius: 8px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.06);
  --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --shadow-lg: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
  --shadow-xl: 0 10px 15px rgba(0,0,0,.1), 0 4px 6px rgba(0,0,0,.05);
  --max-width: 1200px;
  --header-h: 68px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans SC",sans-serif;color:var(--c-text);background:var(--c-bg);line-height:1.65;font-size:15px;min-height:100vh;display:flex;flex-direction:column}
a{color:var(--c-primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--c-primary-dark)}
img{max-width:100%;height:auto;display:block}

/* ===== Header / Nav ===== */
.site-header{background:var(--c-surface);border-bottom:1px solid var(--c-border);position:sticky;top:0;z-index:100;box-shadow:var(--shadow-sm)}
.header-inner{max-width:var(--max-width);margin:0 auto;display:flex;align-items:center;justify-content:space-between;height:var(--header-h);padding:0 20px}
.logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700;color:var(--c-text);white-space:nowrap}
.logo svg{flex-shrink:0}
.logo span{background:linear-gradient(135deg,var(--c-primary),var(--c-accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}

.nav-links{display:flex;align-items:center;gap:6px;list-style:none}
.nav-links a{display:block;padding:8px 16px;border-radius:var(--radius);font-weight:500;font-size:14px;color:var(--c-text-secondary);transition:all .2s}
.nav-links a:hover,.nav-links a.active{background:var(--c-primary);color:#fff}
.nav-dl{background:var(--c-accent)!important;color:#fff!important;font-weight:600!important}
.nav-dl:hover{background:var(--c-accent-light)!important}

/* ===== Hero Section ===== */
.hero{background:linear-gradient(135deg,#0f172a 0%,#1e3a5f 50%,#0f172a 100%);color:#fff;padding:60px 20px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;inset:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E")}
.hero-inner{max-width:800px;margin:0 auto;position:relative;z-index:1}
.hero-badge{display:inline-block;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);border-radius:50px;padding:5px 18px;font-size:13px;margin-bottom:20px;backdrop-filter:blur(4px)}
.hero-badge .dot{display:inline-block;width:8px;height:8px;background:#10b981;border-radius:50%;margin-right:8px;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero h1{font-size:clamp(28px,5vw,46px);font-weight:800;line-height:1.2;margin-bottom:16px;letter-spacing:-.5px}
.hero h1 em{font-style:normal;background:linear-gradient(135deg,#60a5fa,#34d399);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:17px;color:rgba(255,255,255,.75);max-width:600px;margin:0 auto 28px;line-height:1.7}
.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn{padding:12px 28px;border-radius:50px;font-weight:600;font-size:15px;cursor:pointer;transition:all .25s;display:inline-flex;align-items:center;gap:8px;border:none;text-decoration:none}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 4px 14px rgba(26,86,219,.4)}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;transform:translateY(-1px);box-shadow:0 6px 20px rgba(26,86,219,.5)}
.btn-accent{background:var(--c-accent);color:#fff;box-shadow:0 4px 14px rgba(5,150,105,.4)}
.btn-accent:hover{background:var(--c-accent-light);color:#fff;transform:translateY(-1px);box-shadow:0 6px 20px rgba(5,150,105,.5)}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.3)}
.btn-outline:hover{background:rgba(255,255,255,.1);color:#fff;border-color:#fff}
.btn-sm{padding:7px 16px;font-size:13px}

/* ===== Section Common ===== */
.section{padding:56px 20px}
.section-inner{max-width:var(--max-width);margin:0 auto}
.section-title{font-size:28px;font-weight:700;text-align:center;margin-bottom:12px;color:var(--c-text)}
.section-desc{text-align:center;color:var(--c-text-secondary);max-width:600px;margin:0 auto 40px;font-size:15px}

/* ===== Feature Cards ===== */
.features-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px}
.feature-card{background:var(--c-surface);border-radius:var(--radius-lg);padding:28px 24px;box-shadow:var(--shadow);border:1px solid var(--c-border);transition:all .25s}
.feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-xl);border-color:var(--c-primary)}
.feature-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px}
.feature-icon.blue{background:#dbeafe;color:#2563eb}
.feature-icon.green{background:#d1fae5;color:#059669}
.feature-icon.purple{background:#ede9fe;color:#7c3aed}
.feature-icon.amber{background:#fef3c7;color:#d97706}
.feature-icon.rose{background:#ffe4e6;color:#e11d48}
.feature-icon.cyan{background:#cffafe;color:#0891b2}
.feature-card h3{font-size:16px;font-weight:600;margin-bottom:8px}
.feature-card p{font-size:14px;color:var(--c-text-secondary);line-height:1.6}

/* ===== Platform Cards ===== */
.platform-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.platform-card{background:var(--c-surface);border-radius:var(--radius-lg);padding:32px 24px;text-align:center;box-shadow:var(--shadow);border:1px solid var(--c-border);transition:all .25s}
.platform-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-xl)}
.platform-card .icon{font-size:44px;margin-bottom:14px}
.platform-card h3{font-size:18px;font-weight:700;margin-bottom:6px}
.platform-card p{font-size:13px;color:var(--c-text-secondary);margin-bottom:16px}

/* ===== Stats / Highlight ===== */
.stats-row{display:flex;flex-wrap:wrap;justify-content:center;gap:32px 48px;margin-top:20px}
.stat-item{text-align:center}
.stat-num{font-size:clamp(24px,4vw,36px);font-weight:800;color:var(--c-primary)}
.stat-label{font-size:13px;color:var(--c-text-secondary);margin-top:2px}

/* ===== CTA Banner ===== */
.cta-banner{background:linear-gradient(135deg,var(--c-primary),#1e40af);color:#fff;text-align:center;padding:48px 20px;border-radius:var(--radius-lg);margin:0 20px}
.cta-banner-inner{max-width:var(--max-width);margin:0 auto}
.cta-banner h2{font-size:26px;font-weight:700;margin-bottom:12px}
.cta-banner p{color:rgba(255,255,255,.8);margin-bottom:24px;font-size:15px}
.cta-banner .btn{background:#fff;color:var(--c-primary)}
.cta-banner .btn:hover{background:#f1f5f9;color:var(--c-primary-dark)}

/* ===== Content Pages ===== */
.page-hero{background:linear-gradient(135deg,#0f172a,#1e3a5f);color:#fff;padding:40px 20px;text-align:center}
.page-hero h1{font-size:clamp(24px,4vw,36px);font-weight:800;margin-bottom:8px}
.page-hero p{color:rgba(255,255,255,.7);font-size:15px}
.page-content{max-width:var(--max-width);margin:0 auto;padding:40px 20px}
.page-content h2{font-size:22px;font-weight:700;margin:36px 0 14px;padding-bottom:10px;border-bottom:2px solid var(--c-border)}
.page-content h2:first-child{margin-top:0}
.page-content h3{font-size:17px;font-weight:600;margin:24px 0 10px;color:var(--c-primary)}
.page-content p{margin-bottom:14px;color:var(--c-text-secondary);line-height:1.75}
.page-content ul,.page-content ol{margin:8px 0 18px 20px;color:var(--c-text-secondary)}
.page-content li{margin-bottom:6px;line-height:1.7}
.page-content code{background:#f1f5f9;padding:2px 7px;border-radius:4px;font-size:13px;color:var(--c-danger);border:1px solid var(--c-border)}
.page-content pre{background:#1e293b;color:#e2e8f0;padding:18px 22px;border-radius:var(--radius-lg);overflow-x:auto;font-size:13px;line-height:1.6;margin-bottom:18px}
.page-content pre code{background:none;color:inherit;padding:0;border:none}
.page-content .note{background:#fef3c7;border-left:4px solid var(--c-warning);padding:14px 18px;border-radius:0 var(--radius) var(--radius) 0;margin-bottom:18px;font-size:14px}
.page-content .note strong{color:#92400e}
.page-content .tip{background:#d1fae5;border-left:4px solid var(--c-accent);padding:14px 18px;border-radius:0 var(--radius) var(--radius) 0;margin-bottom:18px;font-size:14px}
.page-content .tip strong{color:#065f46}
.page-content .warn{background:#ffe4e6;border-left:4px solid var(--c-danger);padding:14px 18px;border-radius:0 var(--radius) var(--radius) 0;margin-bottom:18px;font-size:14px}
.page-content .warn strong{color:#991b1b}

/* ===== Download Table ===== */
.dl-table{width:100%;border-collapse:collapse;font-size:14px;margin-bottom:10px}
.dl-table th{background:var(--c-primary);color:#fff;padding:12px 16px;text-align:left;font-weight:600;font-size:13px;white-space:nowrap}
.dl-table th:first-child{border-radius:var(--radius) 0 0 0}
.dl-table th:last-child{border-radius:0 var(--radius) 0 0}
.dl-table td{padding:10px 16px;border-bottom:1px solid var(--c-border)}
.dl-table tr:hover td{background:#f8fafc}
.dl-table tr:last-child td:first-child{border-radius:0 0 0 var(--radius)}
.dl-table tr:last-child td:last-child{border-radius:0 0 var(--radius) 0}
.dl-platform{font-weight:600;font-size:13px;color:var(--c-primary)}
.dl-link{display:inline-flex;align-items:center;gap:5px;font-size:13px;font-weight:500;padding:4px 10px;border-radius:var(--radius);background:var(--c-primary);color:#fff;transition:all .2s;white-space:nowrap}
.dl-link:hover{background:var(--c-primary-dark);color:#fff}
.dl-link.sig{background:var(--c-text-secondary);font-size:12px}
.dl-link.sig:hover{background:#475569}
.dl-group{margin-bottom:36px}
.dl-group-title{font-size:20px;font-weight:700;margin-bottom:14px;padding:10px 18px;background:var(--c-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);border-left:4px solid var(--c-primary);display:flex;align-items:center;gap:10px}
.dl-group-title .os-icon{font-size:24px}

/* ===== Cloud Drive Banner ===== */
.cloud-drive{display:flex;align-items:center;flex-wrap:wrap;gap:8px 14px;padding:12px 18px;margin-bottom:14px;background:linear-gradient(135deg,#f0f9ff,#ecfdf5);border:1px solid #bae6fd;border-radius:var(--radius);font-size:13px}
.cloud-label{font-weight:600;color:var(--c-text);white-space:nowrap}
.cloud-btn{display:inline-flex;align-items:center;gap:5px;padding:6px 15px;border-radius:50px;font-weight:600;font-size:13px;color:#fff!important;transition:all .2s;white-space:nowrap}
.cloud-btn:hover{transform:translateY(-1px);box-shadow:0 4px 10px rgba(0,0,0,.15);color:#fff!important}
.cloud-btn.quark{background:linear-gradient(135deg,#1677ff,#4092ff)}
.cloud-btn.quark:hover{background:linear-gradient(135deg,#0958d9,#1677ff)}
.cloud-btn.baidu{background:linear-gradient(135deg,#2468e5,#4d8bf7)}
.cloud-btn.baidu:hover{background:linear-gradient(135deg,#1a4fc4,#2468e5)}
.cloud-pwd{color:var(--c-text-secondary);font-size:12px;white-space:nowrap}
.cloud-pwd strong{color:var(--c-danger)}
.dl-hint{color:var(--c-text-secondary);font-size:13px;margin:6px 0 10px;padding-left:2px}
.dl-actions{display:flex;gap:8px;flex-wrap:wrap}

/* ===== Type Tags ===== */
.type-tag{display:inline-flex;align-items:center;padding:3px 10px;border-radius:50px;font-size:12px;font-weight:600;white-space:nowrap}
.type-installer{background:#dbeafe;color:#1d4ed8}
.type-msi{background:#fef3c7;color:#b45309}
.type-portable{background:#ede9fe;color:#7c3aed}
.type-debug{background:#f1f5f9;color:#475569}
.type-dmg{background:#ffe4e6;color:#be123c}
.type-appimage{background:#d1fae5;color:#047857}
.type-deb{background:#ffedd5;color:#c2410c}
.type-rpm{background:#dbeafe;color:#1d4ed8}
.type-source{background:#e0e7ff;color:#4338ca}
.type-doc{background:#ccfbf1;color:#0f766e}
.type-check{background:#f1f5f9;color:#475569}
.type-bundle{background:#d1fae5;color:#047857}
.dl-arch{font-size:13px;color:var(--c-text-secondary);white-space:nowrap}

/* ===== Breadcrumb ===== */
.breadcrumb{max-width:var(--max-width);margin:0 auto;padding:14px 20px;font-size:13px;color:var(--c-text-secondary)}
.breadcrumb a{color:var(--c-text-secondary)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb span{color:var(--c-text)}

/* ===== Steps ===== */
.steps{counter-reset:step;list-style:none;margin:0!important;padding:0!important}
.steps li{counter-increment:step;position:relative;padding:0 0 24px 48px;margin-bottom:0!important}
.steps li::before{content:counter(step);position:absolute;left:0;top:0;width:32px;height:32px;border-radius:50%;background:var(--c-primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px}
.steps li::after{content:'';position:absolute;left:15px;top:36px;bottom:0;width:2px;background:var(--c-border)}
.steps li:last-child::after{display:none}
.steps h4{font-weight:600;margin-bottom:4px;font-size:15px}
.steps p{font-size:14px;color:var(--c-text-secondary)}

/* ===== FAQ Accordion ===== */
.faq-item{border:1px solid var(--c-border);border-radius:var(--radius);margin-bottom:10px;overflow:hidden}
.faq-q{width:100%;text-align:left;padding:16px 20px;font-size:15px;font-weight:600;background:var(--c-surface);border:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;color:var(--c-text);transition:background .2s}
.faq-q:hover{background:#f8fafc}
.faq-q::after{content:'+';font-size:20px;color:var(--c-primary);font-weight:300;transition:transform .2s}
.faq-item.open .faq-q::after{content:'−'}
.faq-a{display:none;padding:0 20px 18px;font-size:14px;color:var(--c-text-secondary);line-height:1.7}
.faq-item.open .faq-a{display:block}

/* ===== Comparison Table ===== */
.compare-table{width:100%;border-collapse:collapse;font-size:14px;margin:20px 0}
.compare-table th{background:#f1f5f9;padding:12px 16px;text-align:left;font-weight:600;border-bottom:2px solid var(--c-border)}
.compare-table td{padding:10px 16px;border-bottom:1px solid var(--c-border)}
.compare-table .check{color:var(--c-accent);font-weight:700}
.compare-table .cross{color:var(--c-text-secondary)}

/* ===== Footer ===== */
.site-footer{background:#0f172a;color:rgba(255,255,255,.6);margin-top:auto;padding:40px 20px 24px;font-size:13px}
.footer-inner{max-width:var(--max-width);margin:0 auto;display:flex;flex-wrap:wrap;justify-content:space-between;gap:28px}
.footer-col h4{color:#fff;font-size:14px;font-weight:600;margin-bottom:12px}
.footer-col a{display:block;color:rgba(255,255,255,.5);margin-bottom:7px;transition:color .2s}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);margin-top:28px;padding-top:18px;text-align:center;font-size:12px;color:rgba(255,255,255,.35);max-width:var(--max-width);margin-left:auto;margin-right:auto}

/* ===== Responsive ===== */
@media(max-width:768px){
  .header-inner{flex-wrap:wrap;height:auto;padding:10px 16px;gap:8px}
  .nav-links{flex-wrap:wrap;justify-content:center;gap:4px}
  .nav-links a{padding:6px 12px;font-size:13px}
  .hero{padding:40px 16px}
  .hero h1{font-size:24px}
  .hero p{font-size:15px}
  .section{padding:36px 16px}
  .section-title{font-size:22px}
  .features-grid{grid-template-columns:1fr}
  .platform-grid{grid-template-columns:1fr 1fr}
  .dl-table{font-size:12px}
  .dl-table th,.dl-table td{padding:8px 10px}
  .btn{padding:10px 20px;font-size:14px}
  .page-content{padding:24px 16px}
  .footer-inner{flex-direction:column;gap:20px}
}
@media(max-width:480px){
  .platform-grid{grid-template-columns:1fr}
  .hero-actions{flex-direction:column;align-items:center}
  .hero-actions .btn{width:100%;justify-content:center}
  .dl-group-title{font-size:16px}
}