@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700;900&display=swap');

:root {
  --red: #c0392b;
  --red-dark: #a93226;
  --red-light: #fde8e8;
  --blue: #2874a6;
  --blue-light: #e8f4fd;
  --green: #27ae60;
  --green-light: #e8f8ed;
  --bg: #faf8f4;
  --bg-warm: #f5f0e8;
  --card: #ffffff;
  --border: #e8e4df;
  --text: #2d2926;
  --muted: #7a746e;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 6px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --radius: 14px;
  --radius-sm: 10px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}

/* 进度条 */
.progress-bar{position:fixed;top:0;left:0;height:3px;background:linear-gradient(90deg,var(--red),#e74c3c,var(--red));width:0%;z-index:9999;transition:width 80ms}

/* 导航 */
nav{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(255,255,255,0.96);backdrop-filter:blur(16px) saturate(180%);-webkit-backdrop-filter:blur(16px) saturate(180%);border-bottom:1.5px solid var(--border);height:60px;display:flex;align-items:center;justify-content:space-between;padding:0 clamp(16px,4vw,48px);box-shadow:0 1px 12px rgba(0,0,0,0.03)}
.nav-logo{display:flex;align-items:center;gap:8px;font-weight:900;font-size:18px;color:var(--red)}
.nav-logo span{color:var(--text);font-weight:700}
.nav-links{display:flex;gap:8px;align-items:center}
.nav-links a{color:var(--muted);font-size:14px;font-weight:600;padding:6px 14px;border-radius:8px;transition:all .2s;white-space:nowrap}
.nav-links a:hover{color:var(--red);background:var(--red-light)}
.nav-cta{background:var(--red);color:#fff!important;padding:8px 18px!important;border-radius:8px!important;font-weight:700!important;font-size:13px!important;transition:all .2s!important;box-shadow:0 2px 8px rgba(192,57,43,0.25)}
.nav-cta:hover{background:var(--red-dark)!important;transform:translateY(-1px)}
.hamburger{display:none;background:none;border:1.5px solid var(--border);font-size:14px;cursor:pointer;color:var(--text);font-weight:600;padding:6px 12px;border-radius:8px}

/* Hero */
.hero{padding:100px 24px 64px;text-align:center;position:relative;overflow:hidden;background:linear-gradient(180deg,#fff 0%,var(--bg) 100%)}
.hero::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background-image:radial-gradient(circle at 1px 1px,rgba(192,57,43,0.04) 1px,transparent 0);background-size:40px 40px;pointer-events:none}
.hero-emoji{font-size:72px;display:inline-block;animation:float 3s ease-in-out infinite;filter:drop-shadow(0 8px 16px rgba(0,0,0,0.1));margin-bottom:20px}
@keyframes float{0%,100%{transform:translateY(0) rotate(0deg)}25%{transform:translateY(-8px) rotate(-3deg)}75%{transform:translateY(-4px) rotate(2deg)}}
.hero h1{font-size:clamp(28px,5vw,46px);font-weight:900;line-height:1.3;margin-bottom:16px;position:relative}
.hero h1 .red{color:var(--red)}
.hero-sub{font-size:clamp(15px,2vw,18px);color:var(--muted);max-width:600px;margin:0 auto 20px;line-height:1.8}
.hero-tags{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-bottom:28px}
.hero-tag{padding:6px 16px;border-radius:20px;font-size:13px;font-weight:700;background:var(--card);border:1.5px solid var(--border);transition:all .2s}
.hero-tag:hover{border-color:var(--red);color:var(--red);transform:translateY(-1px)}
.hero-btns{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;margin-bottom:40px}
.btn-primary{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:var(--radius-sm);background:var(--red);color:#fff;font-weight:800;font-size:16px;transition:all .25s;box-shadow:0 4px 16px rgba(192,57,43,0.3)}
.btn-primary:hover{background:var(--red-dark);transform:translateY(-2px);box-shadow:0 8px 28px rgba(192,57,43,0.35)}
.btn-secondary{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:var(--radius-sm);background:var(--card);color:var(--red);font-weight:700;font-size:16px;border:2px solid var(--red);transition:all .25s}
.btn-secondary:hover{background:var(--red);color:#fff;transform:translateY(-2px)}
.social-proof{display:flex;justify-content:center;gap:40px;flex-wrap:wrap}
.proof-item{text-align:center;padding:12px 8px}
.proof-num{font-size:28px;font-weight:900;color:var(--red)}
.proof-label{font-size:12px;color:var(--muted);font-weight:600}

/* 通用 section */
.section{max-width:1000px;margin:0 auto;padding:60px clamp(20px,4vw,40px)}
.section-alt{background:var(--bg-warm)}
.section-white{background:#fff}
.section-header{text-align:center;margin-bottom:40px}
.section-label{display:inline-block;font-size:13px;font-weight:700;color:var(--red);padding:4px 14px;border-radius:20px;background:var(--red-light);margin-bottom:12px}
.section-title{font-size:clamp(24px,4vw,36px);font-weight:900;margin-bottom:8px}
.section-desc{font-size:15px;color:var(--muted);max-width:520px;margin:0 auto}

/* 痛点 2x3 */
.pain-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.pain-card{background:var(--card);border:2px solid var(--border);border-radius:var(--radius);padding:28px;transition:all .25s;position:relative;overflow:hidden}
.pain-card::after{content:'';position:absolute;top:0;left:0;width:4px;height:100%;background:var(--red);opacity:0;transition:opacity .2s}
.pain-card:hover{border-color:var(--red);transform:translateY(-3px);box-shadow:var(--shadow-md)}
.pain-card:hover::after{opacity:1}
.pain-icon{font-size:36px;margin-bottom:12px}
.pain-title{font-size:17px;font-weight:800;margin-bottom:8px}
.pain-desc{font-size:14px;color:var(--muted);line-height:1.7}

/* Before/After */
.compare-table{width:100%;border-collapse:collapse;background:var(--card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm)}
.compare-table th{background:var(--bg-warm);padding:14px 20px;font-size:14px;font-weight:800;text-align:left;border-bottom:2px solid var(--border)}
.compare-table th:first-child{color:var(--muted)}
.compare-table th.bad{color:#c0392b}
.compare-table th.good{color:var(--green)}
.compare-table td{padding:14px 20px;font-size:14px;border-bottom:1px solid var(--border);line-height:1.6}
.compare-table tr:last-child td{border-bottom:none}
.compare-table td:first-child{font-weight:700;color:var(--muted);white-space:nowrap}
.compare-table tr:hover td{background:#fffbf8}
.text-bad{color:#c0392b}
.text-good{color:var(--green);font-weight:600}
.compare-wrap{overflow-x:auto;border-radius:var(--radius);border:2px solid var(--border)}

/* 流程步骤 */
.steps-container{max-width:680px;margin:0 auto}
.step{background:var(--card);border:2px solid var(--border);border-radius:var(--radius);padding:28px 28px 28px 90px;margin-bottom:16px;position:relative;transition:all .2s}
.step:hover{border-color:var(--red);box-shadow:var(--shadow-sm)}
.step-num{position:absolute;left:24px;top:28px;width:48px;height:48px;background:var(--red);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:20px;box-shadow:0 4px 12px rgba(192,57,43,0.25)}
.step h3{font-size:17px;font-weight:800;margin-bottom:6px}
.step p{font-size:14px;color:var(--muted);line-height:1.7}
.prompt-box{background:var(--red-light);border-radius:var(--radius-sm);padding:20px 24px;margin-top:24px}
.prompt-box .prompt-label{font-size:12px;font-weight:800;color:var(--red);margin-bottom:8px;text-transform:uppercase;letter-spacing:.5px}
.prompt-box p{font-size:14px;color:var(--red);line-height:1.7;font-style:italic}

/* 应用场景 3x2 */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.scene-card{background:var(--card);border:2px solid var(--border);border-radius:var(--radius);padding:24px;transition:all .25s}
.scene-card:hover{border-color:var(--blue);transform:translateY(-3px);box-shadow:var(--shadow-md)}
.scene-avatar{font-size:36px;margin-bottom:12px}
.scene-pain{display:inline-block;font-size:11px;font-weight:700;padding:3px 10px;border-radius:20px;background:var(--blue-light);color:var(--blue);margin-bottom:8px}
.scene-card h3{font-size:16px;font-weight:800;margin-bottom:6px}
.scene-card p{font-size:13px;color:var(--muted);line-height:1.7}

/* 软件推荐 3列 */
.tools-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.tool-card{background:var(--card);border:2px solid var(--border);border-radius:var(--radius);padding:24px;transition:all .25s;position:relative}
.tool-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--red)}
.tool-card.featured{border-color:var(--red);background:linear-gradient(135deg,#fffaf8 0%,#fff5f0 100%)}
.tool-card.featured::before{content:'⭐ 推荐';position:absolute;top:-10px;right:16px;background:var(--red);color:#fff;font-size:11px;font-weight:800;padding:3px 12px;border-radius:12px}
.tool-rank{font-size:28px;margin-bottom:8px}
.tool-badge{display:inline-block;font-size:11px;font-weight:700;padding:3px 10px;border-radius:20px;color:#fff;background:var(--red);margin-bottom:10px}
.tool-badge.ai{background:var(--blue)}
.tool-badge.futures{background:var(--green)}
.tool-badge.dev{background:#7d3c98}
.tool-card h3{font-size:16px;font-weight:800;margin-bottom:12px}
.tool-meta{display:flex;flex-direction:column;gap:6px}
.tool-meta span{font-size:13px;color:var(--muted);line-height:1.6}
.tool-meta span strong{color:var(--text)}

/* 知识图谱 4x3 */
.know-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.know-card{background:var(--card);border:2px solid var(--border);border-radius:var(--radius-sm);padding:18px;cursor:pointer;transition:all .2s}
.know-card:hover{border-color:var(--red);box-shadow:var(--shadow-sm)}
.know-card.open{border-color:var(--red);background:linear-gradient(135deg,#fffaf8,#fff5f0)}
.know-num{font-size:11px;font-weight:800;color:var(--red);margin-bottom:6px}
.know-card h3{font-size:14px;font-weight:800;margin-bottom:0}
.know-body{font-size:13px;color:var(--muted);line-height:1.7;margin-top:10px;display:none}
.know-card.open .know-body{display:block}

/* 术语速查 2列 */
.glossary-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.g-item{background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius-sm);padding:12px 18px;display:flex;gap:14px;align-items:flex-start;transition:all .2s}
.g-item:hover{border-color:var(--red)}
.g-term{font-size:13px;font-weight:800;color:var(--red);min-width:72px;flex-shrink:0}
.g-def{font-size:13px;color:var(--muted);line-height:1.6}

/* 对比矩阵 */
.matrix-wrap{overflow-x:auto;border-radius:var(--radius);border:2px solid var(--border)}
.matrix-table{width:100%;border-collapse:collapse;font-size:13px;background:var(--card)}
.matrix-table th{background:var(--bg-warm);padding:12px 16px;font-weight:800;text-align:left;border-bottom:2px solid var(--border);white-space:nowrap}
.matrix-table td{padding:12px 16px;border-bottom:1px solid var(--border);color:var(--muted);line-height:1.5}
.matrix-table tr:last-child td{border-bottom:none}
.matrix-table td:first-child{font-weight:700;color:var(--text)}
.matrix-table tr:hover td{background:#fffbf8}
.star{color:#f0a500}
.ck{color:var(--green);font-weight:700}

/* FAQ */
.faq-container{max-width:720px;margin:0 auto}
.faq-item{background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius-sm);margin-bottom:10px;overflow:hidden;transition:all .2s}
.faq-item:hover{border-color:#ddd}
.faq-q{padding:16px 22px;font-weight:700;font-size:15px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:all .2s}
.faq-q:hover{color:var(--red)}
.faq-q::after{content:'+';color:var(--red);font-size:20px;font-weight:300;transition:transform .25s;flex-shrink:0;margin-left:12px}
.faq-item.open .faq-q::after{content:'−';transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease,padding .35s ease;padding:0 22px;font-size:14px;color:var(--muted);line-height:1.7}
.faq-item.open .faq-a{max-height:300px;padding:0 22px 18px}

/* 风险提示 */
.risk-banner{background:linear-gradient(135deg,#fff8f0,#fef0e8);border:2px solid #f5cba7;border-radius:var(--radius);padding:28px 32px;text-align:center;margin:0 auto;max-width:800px}
.risk-banner .risk-icon{font-size:28px;margin-bottom:10px}
.risk-banner h3{font-size:16px;font-weight:800;color:#a04000;margin-bottom:8px}
.risk-banner p{font-size:13px;color:#7d4e24;line-height:1.8}

/* 最终CTA */
.final-cta{text-align:center;padding:64px 24px;background:linear-gradient(180deg,var(--bg) 0%,#fff 50%,var(--bg) 100%)}
.final-cta h2{font-size:clamp(24px,4vw,36px);font-weight:900;margin-bottom:12px}
.final-cta p{font-size:16px;color:var(--muted);margin-bottom:28px}
.btn-big{display:inline-flex;align-items:center;gap:10px;background:var(--red);color:#fff;padding:16px 40px;border-radius:var(--radius-sm);font-weight:800;font-size:18px;transition:all .25s;box-shadow:0 6px 24px rgba(192,57,43,0.3);animation:cta-pulse 2.5s ease-in-out infinite}
.btn-big:hover{background:var(--red-dark);transform:translateY(-3px);box-shadow:0 10px 32px rgba(192,57,43,0.4)}
@keyframes cta-pulse{0%,100%{box-shadow:0 6px 24px rgba(192,57,43,0.3)}50%{box-shadow:0 6px 32px rgba(192,57,43,0.45)}}

/* Footer */
footer{text-align:center;padding:28px 24px;border-top:2px solid var(--border);background:#f5f3ee;font-size:13px;color:var(--muted)}
footer a{color:var(--red);margin:0 8px}

/* Reveal 动画 */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* 响应式 */
@media(max-width:768px){
  .hero{padding:80px 20px 40px}
  .pain-grid{grid-template-columns:repeat(2,1fr)}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .tools-grid{grid-template-columns:1fr}
  .know-grid{grid-template-columns:repeat(2,1fr)}
  .glossary-grid{grid-template-columns:1fr}
  .nav-links{display:none}
  .hamburger{display:block!important}
  .nav-links.open{display:flex;flex-direction:column;position:absolute;top:60px;right:16px;background:#fff;border:1.5px solid var(--border);border-radius:var(--radius-sm);padding:12px 16px;gap:4px;box-shadow:var(--shadow-md)}
  .section{padding:40px 20px}
  .step{padding:24px 20px 24px 76px}
  .step-num{left:16px;top:24px;width:42px;height:42px;font-size:18px}
}
@media(max-width:480px){
  .pain-grid{grid-template-columns:1fr}
  .scene-grid{grid-template-columns:1fr}
  .know-grid{grid-template-columns:repeat(2,1fr)}
  .hero-btns{flex-direction:column;align-items:center}
  .btn-primary,.btn-secondary{width:100%;justify-content:center}
}

/* 深度阅读板块 */
.articles-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:8px}
.article-card{background:var(--bg);border:2px solid var(--border);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column;gap:10px;transition:all .25s}
.article-card:hover{border-color:var(--red);box-shadow:var(--shadow-md);transform:translateY(-3px)}
.article-badge{display:inline-block;font-size:11px;font-weight:700;padding:3px 10px;border-radius:12px;background:var(--red-light);color:var(--red);align-self:flex-start}
.card-title-link{display:flex;flex-direction:column;flex:1;gap:6px;color:var(--text)}
.card-title-link:hover h3{color:var(--red)}
.card-title-link h3{transition:color .2s}
.card-read-original{font-size:13px;font-weight:700;color:var(--red);margin-top:4px;align-self:flex-start}
.card-read-original:hover{text-decoration:underline}
@media(max-width:600px){.articles-grid{grid-template-columns:1fr}}

/* Hub导航卡片 */
.hub-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin:4px auto 0;max-width:800px}
.hub-card{background:var(--card);border:2px solid var(--border);border-radius:var(--radius);padding:32px 28px;display:flex;flex-direction:column;gap:10px;text-decoration:none;color:var(--text);transition:all .25s}
.hub-card:hover{border-color:var(--red);transform:translateY(-3px);box-shadow:var(--shadow-md)}
.hub-icon{font-size:36px}
.hub-title{font-size:16px;font-weight:800;line-height:1.3}
.hub-desc{font-size:14px;color:var(--muted);line-height:1.6;flex:1}
.hub-link{font-size:13px;font-weight:700;color:var(--red);margin-top:4px}
.hub-card{position:relative}
.hub-card-featured{border-color:var(--red)!important;background:linear-gradient(135deg,#fffaf8,#fff5f0)}
.hub-card-featured::before{content:"★ 推荐";position:absolute;top:-10px;right:14px;background:var(--red);color:#fff;font-size:11px;font-weight:800;padding:3px 12px;border-radius:12px}

@media(max-width:700px){.hub-grid{grid-template-columns:1fr;max-width:480px}}

/* Hero 产品截图 */
.hero-screenshot-wrap{margin:32px auto 0;max-width:900px;text-align:center}
.hero-screenshot{width:100%;border-radius:12px;box-shadow:0 8px 40px rgba(0,0,0,.15);border:2px solid var(--border);display:block}
.hero-screenshot-caption{font-size:12px;color:var(--muted);margin-top:10px;letter-spacing:.03em}
@media(max-width:768px){.hero-screenshot-wrap{margin:20px 0 0}}