/* ============================================================
   CrystalDiskInfo 推广网站 - 主样式表
   扁平商务风格 | HTML5 | SEO友好 | SVG图标系统
   ============================================================ */

:root {
  --primary: #1565C0;
  --primary-dark: #0D47A1;
  --primary-light: #42A5F5;
  --accent: #00ACC1;
  --accent-dark: #00838F;
  --success: #2E7D32;
  --warning: #F57F17;
  --danger: #C62828;
  --bg: #F5F7FA;
  --bg-white: #FFFFFF;
  --bg-card: #FFFFFF;
  --text: #263238;
  --text-secondary: #546E7A;
  --text-muted: #90A4AE;
  --border: #E0E0E0;
  --border-light: #ECEFF1;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --font-sans: Segoe UI, PingFang SC, Microsoft YaHei, Helvetica Neue, Arial, sans-serif;
  --font-mono: Cascadia Code, Fira Code, Consolas, monospace;
  --transition: 0.25s ease;
  --max-width: 1200px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px;-webkit-text-size-adjust:100%}
body{font-family:var(--font-sans);color:var(--text);background:var(--bg);line-height:1.7;overflow-x:hidden}
a{color:var(--primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}

h1,h2,h3,h4,h5,h6{line-height:1.3;font-weight:700;color:var(--text)}
h1{font-size:2.5rem;letter-spacing:-0.02em}
h2{font-size:2rem;letter-spacing:-0.01em}
h3{font-size:1.5rem}
h4{font-size:1.2rem}
p{margin-bottom:1rem}
.section-title{text-align:center;margin-bottom:0.5rem}
.section-subtitle{text-align:center;color:var(--text-secondary);font-size:1.1rem;margin-bottom:3rem}

.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}

/* --- SVG Flat Icon System --- */
.icon-wrap{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}
.icon-wrap svg{display:block}
.feature-card .icon-wrap{width:60px;height:60px;margin:0 auto 18px;background:linear-gradient(135deg,#E3F2FD,#B3E5FC);border-radius:var(--radius-md)}
.feature-card .icon-wrap svg{width:32px;height:32px}
.fd-visual .icon-wrap{width:100%;height:220px;background:linear-gradient(135deg,#E3F2FD,#B3E5FC);border-radius:var(--radius-lg)}
.fd-visual .icon-wrap svg{width:80px;height:80px}
.hero-visual .mockup .icon-wrap svg{width:56px;height:56px;opacity:0.85}
.badge .icon-wrap svg{width:18px;height:18px}
.modal .qr-box .icon-wrap svg{width:48px;height:48px}

/* --- Header / Nav --- */
.site-header{background:var(--bg-white);box-shadow:var(--shadow-sm);position:sticky;top:0;z-index:1000;border-bottom:2px solid var(--primary)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-size:1.35rem;font-weight:800;color:var(--primary-dark);letter-spacing:-0.01em}
.logo-icon{width:40px;height:40px;background:linear-gradient(135deg,var(--primary),var(--accent));border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.2rem;font-weight:700;flex-shrink:0}
.nav-links{display:flex;gap:4px}
.nav-links a{display:block;padding:8px 18px;border-radius:var(--radius-sm);font-weight:600;font-size:0.95rem;color:var(--text-secondary);transition:all var(--transition)}
.nav-links a:hover,.nav-links a.active{color:var(--primary);background:rgba(21,101,192,0.06)}
.nav-links a.btn-dl{padding:8px 22px;background:var(--primary);color:#fff;border-radius:var(--radius-sm)}
.nav-links a.btn-dl:hover{background:var(--primary-dark);color:#fff}

/* --- Hero --- */
.hero{background:linear-gradient(135deg,#0D47A1 0%,#1565C0 40%,#00838F 100%);color:#fff;padding:80px 0 90px;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-50%;right:-20%;width:600px;height:600px;background:rgba(255,255,255,0.03);border-radius:50%;pointer-events:none}
.hero::after{content:'';position:absolute;bottom:-30%;left:-10%;width:400px;height:400px;background:rgba(255,255,255,0.03);border-radius:50%;pointer-events:none}
.hero .container{display:flex;align-items:center;gap:60px;position:relative;z-index:1}
.hero-content{flex:1}
.hero-content h1{font-size:2.8rem;color:#fff;margin-bottom:1rem;line-height:1.2}
.hero-content h1 span{color:#80DEEA}
.hero-content p{font-size:1.2rem;color:rgba(255,255,255,0.85);margin-bottom:1.8rem;max-width:520px}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,0.15);border:1px solid rgba(255,255,255,0.2);border-radius:30px;padding:6px 16px;font-size:0.9rem;margin-bottom:1.5rem;backdrop-filter:blur(4px)}
.hero-badge .dot{width:8px;height:8px;background:#69F0AE;border-radius:50%;animation:pulse-dot 2s infinite}
@keyframes pulse-dot{0%,100%{opacity:1}50%{opacity:0.4}}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-visual{flex:0 0 380px;text-align:center}
.hero-visual .mockup{width:450px;height:260px;background:rgba(255,255,255,0.08);border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;flex-direction:column;gap:10px;margin:0 auto;backdrop-filter:blur(4px)}
.hero-visual .mockup .drive-label{font-size:0.9rem;opacity:0.7}

/* --- Buttons --- */
.btn{padding:14px 32px;border-radius:var(--radius-sm);font-weight:700;font-size:1rem;cursor:pointer;border:none;transition:all var(--transition);display:inline-flex;align-items:center;gap:8px;text-align:center;justify-content:center;letter-spacing:0.01em}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-accent{background:#fff;color:var(--primary-dark)}
.btn-accent:hover{background:#E3F2FD;color:var(--primary-dark);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff}
.btn-outline-white{background:transparent;color:#fff;border:2px solid rgba(255,255,255,0.5)}
.btn-outline-white:hover{background:rgba(255,255,255,0.15);border-color:#fff;color:#fff}
.btn-lg{padding:16px 40px;font-size:1.1rem;border-radius:var(--radius-md)}

/* --- Features Grid --- */
.section{padding:80px 0}
.section-gray{background:var(--bg)}
.section-white{background:var(--bg-white)}
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:28px}
.feature-card{background:var(--bg-card);border-radius:var(--radius-md);padding:32px 28px;box-shadow:var(--shadow-sm);border:1px solid var(--border-light);transition:all var(--transition);text-align:center}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--primary-light)}
.feature-card h3{margin-bottom:10px;font-size:1.2rem}
.feature-card p{color:var(--text-secondary);font-size:0.95rem;margin-bottom:0}

/* --- Stats --- */
.stats-bar{display:flex;justify-content:center;gap:60px;flex-wrap:wrap;padding:50px 0}
.stat-item{text-align:center}
.stat-number{font-size:2.8rem;font-weight:800;color:var(--primary);line-height:1}
.stat-label{color:var(--text-secondary);font-size:0.95rem;margin-top:6px}

/* --- Comparison Section --- */
.comparison{background:linear-gradient(180deg,var(--bg-white) 0%,#E8EAF6 100%);padding:80px 0}
.compare-table-wrap{overflow-x:auto;margin-top:20px}
.compare-table{width:100%;border-collapse:separate;border-spacing:0;font-size:0.95rem;box-shadow:var(--shadow-md);border-radius:var(--radius-md);overflow:hidden}
.compare-table thead th{background:var(--primary-dark);color:#fff;padding:16px 18px;text-align:center;font-weight:700;font-size:0.95rem;white-space:nowrap}
.compare-table thead th:first-child{text-align:left;background:var(--primary)}
.compare-table thead th.highlight-col{background:var(--accent);color:#fff;font-size:1rem}
.compare-table tbody td{padding:14px 18px;text-align:center;border-bottom:1px solid var(--border-light);background:var(--bg-white)}
.compare-table tbody td:first-child{text-align:left;font-weight:600;color:var(--text)}
.compare-table tbody td.highlight-col{background:#E0F7FA;font-weight:600}
.compare-table tbody tr:last-child td{border-bottom:none}
.compare-table .icon-yes{color:var(--success);font-weight:700;font-size:1.1rem}
.compare-table .icon-no{color:var(--text-muted)}
.compare-table tbody tr:hover td{background:#F5F7FA}
.compare-table tbody tr:hover td.highlight-col{background:#B2EBF2}
.compare-note{text-align:center;color:var(--text-muted);font-size:0.85rem;margin-top:16px}

/* --- Download Cards --- */
.download-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:28px}
.download-card{background:var(--bg-card);border-radius:var(--radius-md);padding:36px 28px;box-shadow:var(--shadow-sm);border:2px solid var(--border-light);text-align:center;transition:all var(--transition);position:relative;overflow:hidden}
.download-card.featured{border-color:var(--primary);box-shadow:var(--shadow-md)}
.download-card.featured::before{content:'推荐';position:absolute;top:16px;right:-28px;background:var(--primary);color:#fff;font-size:0.75rem;font-weight:700;padding:4px 36px;transform:rotate(45deg)}
.download-card .version{font-size:0.85rem;color:var(--text-muted);margin-bottom:8px}
.download-card h3{font-size:1.3rem;margin-bottom:6px}
.download-card .desc{color:var(--text-secondary);font-size:0.95rem;margin-bottom:20px}
.download-card .meta{font-size:0.85rem;color:var(--text-muted);margin-bottom:20px;line-height:1.6}

/* --- Modal --- */
.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.55);z-index:9999;display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:all 0.3s ease;backdrop-filter:blur(2px)}
.modal-overlay.active{opacity:1;visibility:visible}
.modal{background:var(--bg-white);border-radius:var(--radius-lg);padding:40px;max-width:520px;width:90%;text-align:center;position:relative;box-shadow:0 20px 60px rgba(0,0,0,0.3);transform:translateY(20px);transition:transform 0.3s ease}
.modal-overlay.active .modal{transform:translateY(0)}
.modal-close{position:absolute;top:14px;right:18px;background:none;border:none;font-size:1.6rem;cursor:pointer;color:var(--text-muted);width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;transition:all var(--transition)}
.modal-close:hover{background:var(--bg);color:var(--text)}
.modal .qr-codes{display:flex;gap:30px;justify-content:space-between;margin:24px 0;flex-wrap:wrap}
.modal .qr-item{text-align:center}
.modal .qr-item .qr-box{width:150px;height:150px;background:var(--bg);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;flex-direction:column;margin-bottom:10px;border:2px dashed var(--border);overflow:hidden}
.modal .qr-item .qr-box img{width:100%;height:100%;object-fit:contain;border-radius:4px}
.modal .qr-item .qr-box .qr-placeholder{padding:16px;text-align:center;font-size:0.85rem;color:var(--text-muted)}
.modal .qr-label{font-size:0.9rem;font-weight:600}
.modal .direct-link{margin-top:16px}
.modal .direct-link a{font-weight:600}

/* --- FAQ --- */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--bg-card);border-radius:var(--radius-md);margin-bottom:14px;box-shadow:var(--shadow-sm);border:1px solid var(--border-light);overflow:hidden}
.faq-question{padding:20px 24px;font-weight:700;font-size:1.05rem;cursor:pointer;display:flex;justify-content:space-between;align-items:center;user-select:none;transition:background var(--transition)}
.faq-question:hover{background:var(--bg)}
.faq-question .arrow{transition:transform var(--transition);font-size:0.8rem;color:var(--text-muted)}
.faq-item.open .faq-question .arrow{transform:rotate(180deg);color:var(--primary)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:all 0.35s ease}
.faq-item.open .faq-answer{padding:0 24px 20px;max-height:500px}
.faq-answer p{color:var(--text-secondary);font-size:0.95rem;line-height:1.8}
.status-dot{display:inline-block;width:12px;height:12px;border-radius:50%;margin-right:6px;vertical-align:middle}
.status-dot.good{background:var(--primary)}
.status-dot.caution{background:var(--warning)}
.status-dot.bad{background:var(--danger)}

/* --- Feature Detail --- */
.feature-detail{display:flex;gap:50px;align-items:center;padding:50px 0;border-bottom:1px solid var(--border-light)}
.feature-detail:last-child{border-bottom:none}
.feature-detail:nth-child(even){flex-direction:row-reverse}
.feature-detail .fd-text{flex:1}
.feature-detail .fd-text h2{font-size:1.8rem;margin-bottom:14px}
.feature-detail .fd-text p{color:var(--text-secondary);font-size:1.05rem;line-height:1.8}
.feature-detail .fd-text ul{margin-top:14px}
.feature-detail .fd-text ul li{padding:6px 0 6px 24px;position:relative;color:var(--text-secondary)}
.feature-detail .fd-text ul li::before{content:'\2713';position:absolute;left:0;color:var(--success);font-weight:700}
.feature-detail .fd-visual{flex:0 0 300px}

/* --- Page Hero --- */
.page-hero{background:linear-gradient(135deg,#0D47A1,#1565C0);color:#fff;padding:60px 0;text-align:center}
.page-hero h1{color:#fff;font-size:2.2rem;margin-bottom:10px}
.page-hero p{color:rgba(255,255,255,0.8);font-size:1.1rem;max-width:600px;margin:0 auto}

/* --- Footer --- */
.site-footer{background:#263238;color:rgba(255,255,255,0.7);padding:50px 0 30px;font-size:0.9rem}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:40px;margin-bottom:30px}
.footer-col h4{color:#fff;font-size:1.05rem;margin-bottom:16px}
.footer-col a{display:block;color:rgba(255,255,255,0.6);padding:4px 0;font-size:0.9rem;transition:color var(--transition)}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.1);padding-top:20px;text-align:center;font-size:0.85rem;color:rgba(255,255,255,0.4)}

/* --- Breadcrumb --- */
.breadcrumb{padding:16px 0;font-size:0.9rem;color:var(--text-muted)}
.breadcrumb a{color:var(--text-secondary)}
.breadcrumb span{color:var(--text-muted)}

/* --- CTA --- */
.cta{background:linear-gradient(135deg,var(--primary-dark),var(--accent-dark));color:#fff;padding:70px 0;text-align:center;border-radius:0}
.cta h2{color:#fff;margin-bottom:12px}
.cta p{color:rgba(255,255,255,0.8);margin-bottom:28px;font-size:1.1rem}

/* --- Alerts --- */
.alert{padding:16px 20px;border-radius:var(--radius-sm);margin:20px 0;font-size:0.95rem}
.alert-info{background:#E3F2FD;border-left:4px solid var(--primary);color:#0D47A1}
.alert-success{background:#E8F5E9;border-left:4px solid var(--success);color:#1B5E20}
.alert-warning{background:#FFF8E1;border-left:4px solid var(--warning);color:#E65100}

/* --- Badges --- */
.badges{display:flex;gap:12px;flex-wrap:wrap;justify-content:center;margin:20px 0}
.badge{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:30px;font-size:0.85rem;font-weight:600;background:var(--bg);color:var(--text-secondary)}

/* --- Tabs --- */
.tabs{display:flex;gap:0;border-bottom:2px solid var(--border);margin-bottom:32px}
.tab-btn{padding:14px 28px;background:none;border:none;border-bottom:2px solid transparent;margin-bottom:-2px;font-weight:600;font-size:1rem;color:var(--text-secondary);cursor:pointer;transition:all var(--transition)}
.tab-btn:hover{color:var(--primary)}
.tab-btn.active{color:var(--primary);border-bottom-color:var(--primary)}


/* --- Changelog Timeline --- */
.changelog{max-width:800px;margin:0 auto}
.changelog-item{display:flex;gap:24px;padding:20px 0;border-bottom:1px solid var(--border-light);position:relative}
.changelog-item:last-child{border-bottom:none}
.changelog-item .cl-version{flex:0 0 100px;text-align:center}
.changelog-item .cl-version .ver-tag{display:inline-block;background:var(--primary);color:#fff;font-weight:700;padding:4px 14px;border-radius:20px;font-size:0.9rem;white-space:nowrap}
.changelog-item:first-child .cl-version .ver-tag{background:var(--accent)}
.changelog-item .cl-date{font-size:0.8rem;color:var(--text-muted);margin-top:6px}
.changelog-item .cl-body{flex:1}
.changelog-item .cl-body ul{list-style:none}
.changelog-item .cl-body ul li{padding:4px 0 4px 18px;position:relative;color:var(--text-secondary);font-size:0.93rem;line-height:1.6}
.changelog-item .cl-body ul li::before{content:'';position:absolute;left:0;top:12px;width:6px;height:6px;border-radius:50%;background:var(--primary-light)}/* --- Responsive --- */
@media(max-width:900px){
  .hero .container{flex-direction:column;text-align:center}
  .hero-content p{margin-left:auto;margin-right:auto}
  .hero-actions{justify-content:center}
  .hero-visual{flex:0 0 auto}
  .hero-visual .mockup{width:240px;height:200px}
  .feature-detail{flex-direction:column!important;text-align:center}
  .feature-detail .fd-visual{flex:0 0 auto;max-width:240px;margin:0 auto}
  .stats-bar{gap:30px}
  .stat-number{font-size:2.2rem}
  .nav-links{display:none}
  h1{font-size:2rem}
  .download-cards{grid-template-columns:1fr}
  .compare-table{font-size:0.8rem}
  .compare-table thead th,.compare-table tbody td{padding:10px 12px}
}
@media(max-width:600px){
  .hero-content h1{font-size:1.8rem}
  .section{padding:50px 0}
  .modal{padding:24px}
  .modal .qr-codes{gap:16px}
  .modal .qr-item .qr-box{width:120px;height:120px}
  .tabs{overflow-x:auto}
}
@media print{
  .site-header,.site-footer,.hero,.cta,.modal-overlay{display:none}
  body{font-size:12pt;color:#000}
}