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

/* ===== Reset ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}

/* ===== CSS变量（B.1 色彩体系，禁止修改）===== */
:root{
  --red:#c0392b;--red-dark:#a93226;--red-light:#fde8e8;
  --primary:#c0392b;--primary-dark:#a93226;
  --accent:#f39c12;
  --bg:#faf8f4;--bg-white:#fff;--bg-alt:#f5f0e8;--bg-warm:#f5f0e8;
  --text:#2d2926;--muted:#7a746e;--border:#e8e4df;--card:#ffffff;
}
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;
}

/* ===== Progress Bar ===== */
.progress-bar{position:fixed;top:0;left:0;height:3px;background:var(--red);z-index:1001;width:0;transition:width .1s}

/* ===== Navigation (B.3标准) ===== */
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);text-decoration:none}
.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;text-decoration:none}
.nav-links a:hover{color:var(--red);background:var(--red-light)}
.nav-cta{background:var(--red)!important;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}
@media(max-width:768px){.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:10px;padding:12px 16px;gap:4px;box-shadow:0 6px 24px rgba(0,0,0,0.08)}}

/* ===== Hero ===== */
.hero{text-align:center;padding:120px clamp(16px,5vw,48px) 60px;background:linear-gradient(180deg,#fff 0%,var(--bg) 100%)}
.hero-emoji{font-size:48px;margin-bottom:12px}
.hero h1{font-size:clamp(24px,4vw,38px);font-weight:900;line-height:1.3;margin-bottom:16px}
.hero h1 .red{color:var(--red)}
.hero-sub{font-size:clamp(15px,2vw,17px);color:var(--muted);max-width:720px;margin:0 auto 24px;line-height:1.7}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:28px}
.hero-tag{background:var(--red-light);color:var(--red);font-size:13px;font-weight:600;padding:4px 14px;border-radius:20px}
.hero-btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:36px}
.btn-primary,.btn-big{display:inline-block;background:var(--red);color:#fff;font-weight:700;border-radius:8px;text-decoration:none;transition:all .2s;box-shadow:0 2px 12px rgba(192,57,43,0.3)}
.btn-primary{padding:10px 24px;font-size:15px}
.btn-primary:hover,.btn-big:hover{background:var(--red-dark);transform:translateY(-1px)}
.btn-secondary{display:inline-block;border:1.5px solid var(--border);color:var(--text);font-weight:600;padding:10px 24px;font-size:15px;border-radius:8px;text-decoration:none;transition:all .2s}
.btn-secondary:hover{border-color:var(--red);color:var(--red)}
.btn-big{padding:14px 36px;font-size:17px}

/* ===== Social Proof ===== */
.social-proof{display:flex;justify-content:center;gap:32px;flex-wrap:wrap}
.proof-item{text-align:center}
.proof-num{font-size:22px;font-weight:900;color:var(--red)}
.proof-label{font-size:13px;color:var(--muted);margin-top:2px}

/* ===== Section Layout ===== */
.section-white{background:var(--bg-white);padding:60px clamp(16px,5vw,48px)}
.section-alt{background:var(--bg-alt);padding:60px clamp(16px,5vw,48px)}
.section{max-width:1100px;margin:0 auto}
.section-header{text-align:center;margin-bottom:36px}
.section-label{display:inline-block;background:var(--red-light);color:var(--red);font-size:13px;font-weight:700;padding:4px 16px;border-radius:20px;margin-bottom:12px}
.section-title{font-size:clamp(20px,3vw,28px);font-weight:800;margin-bottom:8px}
.section-desc{font-size:15px;color:var(--muted);max-width:650px;margin:0 auto}

/* ===== Hub Grid & Cards ===== */
.hub-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.hub-card{display:block;background:var(--card);border:1.5px solid var(--border);border-radius:10px;padding:16px;text-decoration:none;color:var(--text);transition:all .25s}
.hub-card:hover{border-color:var(--red);box-shadow:0 4px 20px rgba(192,57,43,0.1);transform:translateY(-2px)}
.hub-icon{font-size:22px;margin-bottom:6px}
.hub-title{font-size:13px;font-weight:700;margin-bottom:4px;line-height:1.3}
.hub-desc{font-size:11px;color:var(--muted);line-height:1.5;margin-bottom:8px}
.hub-link{color:var(--red);font-weight:700;font-size:11px}
@media(max-width:1024px){.hub-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:768px){.hub-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.hub-grid{grid-template-columns:1fr}}

/* ===== Info Grid & Cards ===== */
.info-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.info-card{background:var(--card);border:1.5px solid var(--border);border-radius:10px;padding:20px;text-align:center}
.info-card .info-value{font-size:22px;font-weight:900;color:var(--red);margin-bottom:4px}
.info-card .info-label{font-size:13px;color:var(--muted)}
@media(max-width:768px){.info-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.info-grid{grid-template-columns:1fr}}

/* ===== comp-table ===== */
.comp-table{width:100%;border-collapse:collapse;margin:20px 0;border-radius:10px;overflow:hidden;box-shadow:0 2px 12px rgba(0,0,0,0.05)}
.comp-table thead{background:var(--red);color:#fff}
.comp-table th{padding:12px 16px;text-align:left;font-size:14px;font-weight:700}
.comp-table td{padding:12px 16px;font-size:14px;border-bottom:1px solid var(--border)}
.comp-table tbody tr{background:var(--card)}
.comp-table tbody tr:nth-child(even){background:var(--bg)}
.comp-table tbody tr:first-child td{font-weight:700;color:var(--red)}
@media(max-width:768px){.comp-table th,.comp-table td{padding:8px 10px;font-size:13px}}

/* ===== FAQ ===== */
.faq-container{max-width:800px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--border);padding:18px 0}
.faq-item:last-child{border-bottom:none}
.faq-q{font-size:16px;font-weight:700;color:var(--text);margin-bottom:10px;cursor:default}
.faq-a{font-size:14px;color:var(--muted);line-height:1.7}


/* === FAQ Accordion === */
.faq-accordion{max-width:1000px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:10px;align-items:start}
.faq-card{background:#fff;border:1px solid var(--border);border-radius:10px;overflow:hidden;transition:all 0.3s ease;box-shadow:0 1px 4px rgba(0,0,0,0.04)}
.faq-card:hover{border-color:var(--primary);box-shadow:0 2px 12px rgba(0,0,0,0.08)}
.faq-card-header{display:flex;align-items:center;gap:12px;padding:14px 18px;cursor:pointer;user-select:none;background:#fff;border:none;width:100%;text-align:left;font-family:inherit;transition:background 0.2s}
.faq-card-header:hover{background:var(--red-light)}
.faq-card-num{font-size:0.78rem;font-weight:700;color:var(--primary);opacity:0.5;min-width:24px}
.faq-card-q{flex:1;font-weight:700;font-size:0.92rem;color:var(--text);line-height:1.45}
.faq-card-arrow{flex-shrink:0;width:18px;height:18px;position:relative;transition:transform 0.3s ease}
.faq-card-arrow::before,.faq-card-arrow::after{content:'';position:absolute;background:var(--primary);border-radius:2px;transition:all 0.3s ease}
.faq-card-arrow::before{top:8px;left:0;width:18px;height:2px}
.faq-card-arrow::after{top:0;left:8px;width:2px;height:18px}
.faq-card-body{max-height:0;overflow:hidden;transition:max-height 0.4s ease,padding 0.3s ease}
.faq-card-a{padding:0 18px 18px 48px;color:var(--muted);font-size:0.88rem;line-height:1.7}
.faq-card-a strong{color:var(--text)}
.faq-card-a a{color:var(--primary);font-weight:600;text-decoration:none}
.faq-card-a a:hover{text-decoration:underline}
.faq-card.open .faq-card-body{max-height:500px;padding-bottom:4px}
.faq-card.open .faq-card-arrow{transform:rotate(45deg)}
.faq-card.open .faq-card-header{background:var(--red-light)}
.faq-card.open{border-color:var(--primary);box-shadow:0 2px 12px rgba(0,0,0,0.08)}
@media(max-width:768px){.faq-accordion{grid-template-columns:1fr;max-width:800px}}

/* ===== Final CTA ===== */
.final-cta{background:linear-gradient(180deg,var(--bg) 0%,#fff 50%,var(--bg) 100%);color:var(--text);padding:60px clamp(16px,5vw,48px);text-align:center}
.final-cta .section-header{color:var(--text)}
.final-cta-title{font-size:clamp(20px,3vw,26px);font-weight:800;margin-bottom:8px}
.final-cta .section-desc{color:var(--muted);margin-bottom:20px}
.final-cta .btn-big{background:var(--red);color:#fff;box-shadow:0 6px 24px rgba(192,57,43,0.3)}
.final-cta .btn-big:hover{background:var(--red-dark)}

/* ===== Footer ===== */
footer{background:#f5f3ee;color:var(--muted);padding:32px clamp(16px,5vw,48px);text-align:center;font-size:13px;line-height:2;border-top:2px solid var(--border)}
footer a{color:var(--red);text-decoration:none;margin:0 8px;font-weight:600}
footer a:hover{color:var(--red-dark)}

/* ===== Breadcrumb ===== */
.breadcrumb{padding:80px clamp(16px,5vw,48px) 8px;font-size:14px;color:var(--muted)}
.breadcrumb a{color:var(--red);text-decoration:none;font-weight:600}
.breadcrumb a:hover{text-decoration:underline}

/* ===== Article Content (Spoke页) ===== */
.article-wrap{max-width:800px;margin:0 auto;padding:0 clamp(16px,5vw,48px) 40px}
.article-wrap h1{font-size:clamp(22px,3.5vw,32px);font-weight:900;color:var(--text);margin-bottom:12px;line-height:1.3}
.article-wrap h1 .red{color:var(--red)}
.article-date{font-size:13px;color:var(--muted);margin-bottom:24px}
.article-wrap h2{font-size:clamp(18px,2.5vw,22px);font-weight:800;border-left:4px solid var(--red);padding-left:14px;margin:32px 0 14px;line-height:1.4}
.article-wrap h3{font-size:clamp(16px,2vw,18px);font-weight:700;margin:24px 0 10px}
.article-wrap p{font-size:15px;line-height:1.8;color:var(--text);margin-bottom:14px}
.article-wrap ul,.article-wrap ol{padding-left:24px;margin-bottom:14px}
.article-wrap li{font-size:15px;line-height:1.8;margin-bottom:6px}

/* ===== Highlight Box ===== */
.highlight-box{background:var(--red-light);border:1px solid rgba(192,57,43,0.2);border-radius:10px;padding:16px 24px;margin:20px 0;font-size:14px;line-height:1.7}
.highlight-box strong{color:var(--red)}

/* ===== Disclaimer Box ===== */
.disclaimer-box{background:#fef9e7;border:1px solid #f9e79f;border-radius:10px;padding:14px 20px;margin:24px 0;font-size:13px;color:#7d6608;line-height:1.7}
.disclaimer-box strong{color:#9a7d0a}

/* ===== Inline CTA ===== */
.inline-cta{background:linear-gradient(135deg,#fde8e8,#fff5f5);border:1.5px solid rgba(192,57,43,0.2);border-radius:12px;padding:20px 24px;margin:28px 0;text-align:center;display:flex;flex-direction:column;align-items:center;gap:12px}
.inline-cta p{font-size:15px;font-weight:600;color:var(--text);margin:0}

/* ===== Related Section ===== */
.related-section{background:var(--bg-alt);border-radius:10px;padding:20px 24px;margin:28px 0}
.related-section h3{font-size:16px;font-weight:700;margin-bottom:12px}
.related-section a{display:block;color:var(--red);font-weight:600;font-size:14px;text-decoration:none;padding:6px 0;transition:all .15s}
.related-section a:hover{color:var(--red-dark)}

/* ===== Back Link ===== */
.back-link{display:inline-block;color:var(--red);font-weight:700;text-decoration:none;font-size:15px;margin-top:20px;transition:color .15s}
.back-link:hover{color:var(--red-dark)}

/* ===== Scroll Reveal ===== */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .6s,transform .6s}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ===== Pain Grid ===== */
.pain-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.pain-card{background:var(--card);border:1.5px solid var(--border);border-radius:10px;padding:20px;transition:all .2s}
.pain-card:hover{border-color:var(--red);box-shadow:0 2px 12px rgba(0,0,0,0.06)}
.pain-icon{font-size:28px;margin-bottom:10px}
.pain-title{font-weight:700;font-size:15px;margin-bottom:8px}
.pain-desc{font-size:13px;color:var(--muted);line-height:1.6}
@media(max-width:768px){.pain-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.pain-grid{grid-template-columns:1fr}}

/* ===== Steps ===== */
.steps-container{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:24px}
.step{background:var(--card);border:1.5px solid var(--border);border-radius:10px;padding:20px;text-align:center;transition:all .2s}
.step:hover{border-color:var(--red)}
.step-num{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;background:var(--red);color:#fff;border-radius:50%;font-weight:900;font-size:16px;margin-bottom:10px}
.step h3{font-size:15px;font-weight:700;margin-bottom:6px}
.step p{font-size:13px;color:var(--muted);line-height:1.6}
@media(max-width:768px){.steps-container{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.steps-container{grid-template-columns:1fr}}

/* ===== Data Dashboard ===== */
.data-dashboard{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:20px 0}
.data-card{background:var(--card);border:1.5px solid var(--border);border-radius:10px;padding:16px;text-align:center}
.data-card .data-value{font-size:24px;font-weight:900;color:var(--red)}
.data-card .data-label{font-size:12px;color:var(--muted);margin-top:4px}
.data-card .data-change{font-size:13px;font-weight:700;margin-top:2px}
.data-card .data-change.up{color:#27ae60}
.data-card .data-change.down{color:var(--red)}
.data-row{grid-column:1/-1;background:var(--bg);border-radius:8px;padding:12px 16px;display:flex;justify-content:space-around;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--muted)}
@media(max-width:768px){.data-dashboard{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.data-dashboard{grid-template-columns:1fr}}

/* ===== Stock hero specific ===== */
.stock-cta-box{background:linear-gradient(135deg,var(--red),var(--red-dark));color:#fff;border-radius:10px;padding:16px 20px;text-align:center;margin:16px 0;grid-column:1/-1}
.stock-cta-box a{color:#fff;font-weight:700;text-decoration:underline}
.stock-cta-box a:hover{text-decoration:none}