/* 温析 Wenxi — 首页样式（无外部字体依赖） */

/* ─── 中文字体优先级 ─── */
@font-face {
  font-family: 'ChineseFont';
  src: local('PingFang SC'), local('Microsoft YaHei'), local('Noto Sans CJK SC'), local('Source Han Sans SC');
}

/* ─── 变量 ─── */
:root {
  --ink:#0d0d0d; --paper:#f5f0e8; --cream:#ede8dc;
  --accent:#e84c1e; --accent2:#f5a623; --muted:#7a7060;
  --border:#d4cfc3; --card:#faf7f2;
  /* 字体栈：系统字体优先，无外部依赖 */
  --font-zh: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Source Han Sans SC', 'WenQuanYi Micro Hei', 'SimHei', sans-serif;
  --font-en: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-mono: 'SF Mono', 'Consolas', 'Menlo', 'Monaco', monospace;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family: var(--font-en);
  background:var(--paper);
  color:var(--ink);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
/* 中文内容优先用中文字体 */
h1,h2,h3,h4,h5,h6,.nav-logo,.card-title,.page-title,.site-name { font-family: var(--font-zh); }
a{color:inherit;text-decoration:none}
::-webkit-scrollbar{width:6px}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}

/* ─── 导航 ─── */
nav{position:sticky;top:0;z-index:100;background:rgba(245,240,232,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.nav-inner{max-width:1200px;margin:0 auto;padding:0 20px;height:64px;display:flex;align-items:center;justify-content:space-between}
.nav-logo{font-weight:900;font-size:1.15rem;display:flex;align-items:center;gap:8px;letter-spacing:-0.02em}
.nav-logo .dot{width:8px;height:8px;border-radius:50%;background:var(--accent);display:inline-block;flex-shrink:0}
.nav-links{display:flex;gap:2rem;font-size:.875rem;font-weight:500;color:var(--muted)}
.nav-links a:hover{color:var(--ink)}
.nav-cta{background:var(--ink);color:var(--paper);padding:8px 20px;border-radius:100px;font-size:.875rem;font-weight:600;transition:background .2s,transform .15s}
.nav-cta:hover{background:var(--accent);transform:translateY(-1px)}
.btn-primary.nav-cta{background:var(--ink);color:var(--paper)}

/* ─── Hero ─── */
.hero{min-height:92vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:80px 20px 60px;position:relative;overflow:hidden}
.hero-bg{position:absolute;border-radius:50%;filter:blur(80px);opacity:.16;pointer-events:none}
.c1{width:600px;height:600px;background:var(--accent);top:-200px;left:-150px}
.c2{width:500px;height:500px;background:var(--accent2);bottom:-100px;right:-100px}
.hero-content{position:relative;z-index:1;max-width:760px;width:100%}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:var(--cream);border:1px solid var(--border);border-radius:100px;padding:6px 16px;font-size:.8rem;font-weight:600;color:var(--muted);margin-bottom:28px;letter-spacing:.04em;text-transform:uppercase;animation:fadeUp .6s ease both}
.pulse-dot{width:7px;height:7px;border-radius:50%;background:var(--accent);animation:pulse 1.8s ease infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(1.4)}}
@keyframes fadeUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
.hero h1{font-size:clamp(2.8rem,7vw,5.5rem);font-weight:900;line-height:1.1;letter-spacing:-.03em;margin-bottom:24px;animation:fadeUp .7s .1s ease both;font-family:var(--font-zh)}
.hero h1 em{font-style:normal;color:var(--accent);position:relative}
.hero h1 em::after{content:'';position:absolute;bottom:4px;left:0;right:0;height:3px;background:var(--accent);border-radius:2px;opacity:.4}
.hero-sub{font-size:clamp(1rem,2vw,1.2rem);color:var(--muted);max-width:600px;margin:0 auto 40px;font-weight:300;animation:fadeUp .7s .2s ease both}
.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;animation:fadeUp .7s .3s ease both}
.hero-stats{display:flex;gap:40px;justify-content:center;margin-top:64px;flex-wrap:wrap;animation:fadeUp .7s .4s ease both}
.stat{text-align:center}
.stat-num{font-size:2rem;font-weight:900;display:block;font-family:var(--font-zh)}
.stat-lbl{font-size:.8rem;color:var(--muted)}

/* Demo Box */
.demo-box{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:28px;margin-top:72px;text-align:left;box-shadow:0 20px 60px rgba(0,0,0,.08);animation:fadeUp .8s .5s ease both}
.demo-label{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-bottom:12px}
.demo-row{display:flex;gap:10px}
.demo-input{flex:1;background:var(--paper);border:1.5px solid var(--border);border-radius:10px;padding:12px 16px;font-family:var(--font-mono);font-size:.85rem;color:var(--muted);outline:none;transition:border-color .2s}
.demo-input:focus{border-color:var(--accent);color:var(--ink)}
.demo-btn{background:var(--ink);color:var(--paper);border:none;border-radius:10px;padding:12px 24px;font-weight:700;font-size:.9rem;cursor:pointer;transition:background .2s;white-space:nowrap}
.demo-btn:hover{background:var(--accent)}
.platforms{display:flex;gap:8px;margin-top:14px;flex-wrap:wrap}
.ptag{background:var(--cream);border:1px solid var(--border);border-radius:6px;padding:4px 10px;font-size:.75rem;font-weight:600;color:var(--muted)}

/* Hero Buttons */
.btn-hero-primary{background:var(--accent);color:#fff;padding:14px 32px;border-radius:100px;font-weight:700;font-size:1rem;border:none;cursor:pointer;transition:transform .15s,box-shadow .2s;box-shadow:0 4px 20px rgba(232,76,30,.35);display:inline-block}
.btn-hero-primary:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(232,76,30,.45)}
.btn-hero-secondary{background:transparent;color:var(--ink);padding:14px 32px;border-radius:100px;font-weight:600;font-size:1rem;border:1.5px solid var(--border);cursor:pointer;transition:border-color .2s,background .2s;display:inline-block}
.btn-hero-secondary:hover{border-color:var(--ink);background:var(--cream)}
.btn-hero-white{background:#fff;color:var(--accent);padding:14px 36px;border-radius:100px;font-weight:700;font-size:1rem;border:none;cursor:pointer;transition:transform .15s,box-shadow .2s;box-shadow:0 4px 20px rgba(0,0,0,.15);display:inline-block}
.btn-hero-white:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(0,0,0,.2)}

/* ─── Section Shared ─── */
section{padding:100px 20px}
.section-header{text-align:center;margin-bottom:64px}
.section-label{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--accent);margin-bottom:12px}
.section-header h2{font-size:clamp(2rem,4vw,3rem);font-weight:900;line-height:1.15;letter-spacing:-.02em;max-width:640px;margin:0 auto;font-family:var(--font-zh)}
.section-header p{color:var(--muted);font-size:1.05rem;max-width:520px;margin:12px auto 0;font-weight:300}
.section-label.light{color:var(--accent2)}

/* ─── Features ─── */
.features{background:var(--cream)}
.features-grid{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px}
.feature-card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:32px;transition:transform .2s,box-shadow .2s;position:relative;overflow:hidden}
.feature-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),var(--accent2));opacity:0;transition:opacity .2s}
.feature-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,0,0,.1)}
.feature-card:hover::before{opacity:1}
.feature-icon{font-size:1.4rem;margin-bottom:20px}
.feature-card h3{font-size:1.15rem;font-weight:700;margin-bottom:8px;font-family:var(--font-zh)}
.feature-card p{font-size:.9rem;color:var(--muted);line-height:1.7}

/* ─── Steps ─── */
.steps-section{max-width:1200px;margin:0 auto}
.steps-inner{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
.step-list{display:flex;flex-direction:column}
.step-item{display:flex;gap:20px;padding:28px 0;border-bottom:1px solid var(--border)}
.step-item:last-child{border-bottom:none}
.step-num{font-family:var(--font-mono);font-size:.75rem;font-weight:700;color:var(--accent);min-width:28px;padding-top:3px}
.step-item h3{font-size:1.1rem;font-weight:700;margin-bottom:6px;font-family:var(--font-zh)}
.step-item p{font-size:.9rem;color:var(--muted)}

.viz-card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px;box-shadow:0 4px 20px rgba(0,0,0,.05)}
.viz-label{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:8px}
.viz-url{font-family:var(--font-mono);font-size:.75rem;color:var(--muted);word-break:break-all}
.viz-arrow{text-align:center;font-size:1.2rem;color:var(--muted);padding:12px 0}
.viz-progress{height:12px;background:var(--cream);border-radius:6px;overflow:hidden;margin-bottom:4px}
.viz-progress-fill{height:100%;border-radius:6px;background:linear-gradient(90deg,var(--accent),var(--accent2));animation:barGrow 2s ease infinite alternate}
@keyframes barGrow{from{width:30%}to{width:90%}}
.viz-lines{display:flex;flex-direction:column;gap:6px}
.vl{height:8px;border-radius:4px;background:var(--border)}
.vll{width:95%}.vlm{width:80%}.vls{width:60%}
.viz-tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:12px}
.vt{background:var(--cream);border:1px solid var(--border);border-radius:6px;padding:3px 10px;font-size:.72rem;font-weight:600;color:var(--muted);cursor:pointer;transition:all .15s}
.vt.active,.vt:hover{background:var(--accent);border-color:var(--accent);color:#fff}

/* ─── Use Cases ─── */
.usecases{background:var(--ink);color:var(--paper)}
.usecases h2{color:var(--paper);font-family:var(--font-zh)}
.usecases p{color:rgba(245,240,232,.55)}
.usecases-grid{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.usecase-card{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:32px;transition:background .2s,border-color .2s}
.usecase-card:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.2)}
.usecase-icon{font-size:2rem;margin-bottom:16px}
.usecase-card h3{font-size:1.1rem;font-weight:700;margin-bottom:10px;color:var(--paper);font-family:var(--font-zh)}
.usecase-card p{font-size:.875rem;color:rgba(245,240,232,.55);line-height:1.7}

/* ─── Pricing ─── */
.pricing-note{font-size:.8rem;color:var(--muted);margin-top:8px}
.pricing-grid{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px}
.pricing-card{background:var(--card);border:1.5px solid var(--border);border-radius:12px;padding:28px 24px;position:relative;transition:transform .2s,box-shadow .2s}
.pricing-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,0,0,.1)}
.pricing-card.featured{border-color:var(--accent);background:var(--paper)}
.pricing-badge{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--accent);color:#fff;font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;padding:4px 12px;border-radius:100px;white-space:nowrap}
.pricing-tier{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-bottom:6px}
.pricing-name{font-size:1.2rem;font-weight:900;margin-bottom:4px;font-family:var(--font-zh)}
.pricing-desc{font-size:.8rem;color:var(--muted);margin-bottom:20px}
.pricing-price{font-family:var(--font-mono);font-size:2rem;font-weight:700;color:var(--ink);margin-bottom:4px}
.pricing-price span{font-size:.9rem;color:var(--muted);font-weight:400}
.pricing-mins{font-size:.8rem;color:var(--muted);margin-bottom:20px}
.pricing-features{list-style:none;display:flex;flex-direction:column;gap:8px;margin-bottom:24px}
.pricing-features li{font-size:.85rem;color:var(--muted);display:flex;align-items:flex-start;gap:8px}
.pricing-features li::before{content:'✓';color:var(--accent);font-weight:700;flex-shrink:0}
.pricing-btn{display:block;width:100%;padding:12px;border-radius:8px;font-weight:700;font-size:.9rem;text-align:center;border:1.5px solid var(--border);background:transparent;color:var(--ink);transition:all .2s}
.pricing-btn:hover{border-color:var(--ink);background:var(--ink);color:var(--paper)}
.pricing-btn.featured-btn{background:var(--accent);border-color:var(--accent);color:#fff}
.pricing-btn.featured-btn:hover{background:#c73d14;border-color:#c73d14}
.pricing-free{max-width:480px;margin:40px auto 0;background:var(--cream);border:1px solid var(--border);border-radius:12px;padding:24px 32px;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.pricing-free h4{font-size:1.1rem;font-weight:700;margin-bottom:4px;font-family:var(--font-zh)}
.pricing-free p{font-size:.85rem;color:var(--muted)}

/* ─── 定价引导 ─── */
.pricing-guide {
  padding: 80px 20px;
  background: var(--cream);
  text-align: center;
}
.pricing-guide-inner {
  max-width: 640px;
  margin: 0 auto;
}
.pricing-guide h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 900;
  margin-bottom: 12px;
  font-family: var(--font-zh);
}
.pricing-guide p {
  color: var(--muted);
  font-size: 1rem;
  margin-bottom: 28px;
}

/* ─── CTA ─── */
.cta-section{background:var(--accent);color:#fff;text-align:center;padding:80px 20px}
.cta-section h2{font-size:clamp(2rem,4vw,3rem);font-weight:900;margin-bottom:16px;letter-spacing:-.02em;font-family:var(--font-zh)}
.cta-section p{font-size:1.1rem;opacity:.85;margin-bottom:36px}

/* ─── Footer ─── */
footer{background:var(--ink);color:rgba(245,240,232,.5);padding:60px 20px 40px}
.footer-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-brand .nav-logo{color:var(--paper);margin-bottom:12px;font-size:1.15rem}
.footer-brand p{font-size:.875rem;line-height:1.7;max-width:280px}
.footer-col h4{font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--paper);margin-bottom:16px}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer-col ul li a{font-size:.875rem;transition:color .2s}
.footer-col ul li a:hover{color:var(--paper)}
.footer-bottom{max-width:1200px;margin:32px auto 0;display:flex;justify-content:space-between;align-items:center;font-size:.8rem;flex-wrap:wrap;gap:12px}
.footer-bottom a:hover{color:var(--paper)}

/* ─── Responsive ─── */
/* 手机端导航默认隐藏 */
.nav-links-mobile{display:none}
@media(max-width:768px){
  .nav-links{display:none}
  .nav-links-mobile{
    display:flex!important;
    justify-content:center;
    gap:0.6rem;
    font-size:.78rem;
    order:2
  }
  .nav-links-mobile a{color:var(--muted);padding:4px 6px;white-space:nowrap}
  .nav-links-mobile a:hover{color:var(--accent)}
  .nav-inner{
    flex-wrap:wrap;
    align-items:center;
    justify-content:center;
    gap:6px;
    padding:8px 12px
  }
  .nav-logo{order:1;font-size:.88rem;white-space:nowrap}
  .nav-cta{order:3;font-size:.75rem;padding:5px 10px;white-space:nowrap}
  .steps-inner{grid-template-columns:1fr;gap:40px}
  .steps-right{display:none}
  .footer-inner{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
}
@media(max-width:480px){
  .nav-links-mobile{gap:0.4rem;font-size:.72rem}
  .nav-logo{font-size:.82rem}
  .nav-cta{font-size:.7rem;padding:4px 8px}
  .footer-inner{grid-template-columns:1fr}
  .hero-stats{gap:24px}
  .pricing-free{justify-content:center;text-align:center}
}