/* 富爱俱乐部 · 合肥 · style.css */
/* 设计风格：科创新城·理工极简 | 字体变体 C (Noto Sans SC 300 无衬线摩登) */
/* Trust Strip C (深色双列带序号) | Footer D (居中极简) | 圆角 2px */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400&family=EB+Garamond:ital@1&display=swap');

/* ─── Tokens ─── */
:root {
  --blue: #1a4f8a;
  --blue-light: #2a6ab0;
  --blue-bright: #3a80cc;
  --gray: #3a4a5a;
  --gold: #8a9ab0;
  --bg: #f2f4f8;
  --bg-alt: #e6eaf0;
  --bg-dark: #0a1220;
  --ink: #0a1220;
  --ink-light: #1a2840;
  --ink-muted: #5a6a80;
  --ink-faint: #9aaac0;
  --on-dark: rgba(230,238,248,0.96);
  --on-dark-muted: rgba(150,180,220,0.72);
  --on-dark-faint: rgba(90,120,160,0.48);
  --border: #c8d4e4;
  --border-dark: #142030;
  --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-num: 'EB Garamond', Georgia, serif;
  --radius: 2px;
  --radius-sm: 1px;
}

/* ─── Reset ─── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font-sans);font-weight:300;font-size:16px;line-height:1.95;letter-spacing:0.02em;color:var(--ink);background:var(--bg);overflow-x:hidden}
img{display:block;width:100%;height:100%;object-fit:cover}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}

/* ─── Typography ─── */
.t-label{font-size:14px;font-weight:300;letter-spacing:0.24em;text-transform:uppercase;color:var(--blue)}
.t-hero{font-family:var(--font-sans);font-size:clamp(2.25rem,5.5vw,4.5rem);font-weight:300;line-height:1.2;letter-spacing:0.02em}
.t-h2{font-family:var(--font-sans);font-size:clamp(1.625rem,3vw,2.5rem);font-weight:300;line-height:1.4;letter-spacing:0.02em}
.t-h3{font-size:18px;font-weight:300;line-height:1.5;letter-spacing:0.02em}
.t-body{font-size:16px;font-weight:300;line-height:1.95;letter-spacing:0.02em}
.t-small{font-size:14px;font-weight:300;line-height:1.85;letter-spacing:0.02em}
.t-num{font-family:var(--font-num);font-style:italic;color:var(--blue-bright)}

/* ─── Layout ─── */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 40px}
.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}

/* ─── Reveal ─── */
.reveal{opacity:0;transform:translateY(20px);transition:opacity 0.6s ease,transform 0.6s ease}
.reveal.is-visible{opacity:1;transform:none}

/* ─── Navbar ─── */
.navbar{position:fixed;top:0;left:0;right:0;z-index:100;background:transparent;transition:background 0.3s,border-bottom 0.3s}
.navbar.scrolled{background:rgba(242,244,248,0.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:20px 0}
.nav-logo{font-family:var(--font-sans);font-size:15px;font-weight:300;letter-spacing:0.06em;color:var(--ink)}
.nav-logo span{color:var(--blue)}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-links a{font-size:14px;font-weight:300;letter-spacing:0.04em;color:var(--ink-light);transition:color 0.2s}
.nav-links a:hover{color:var(--blue)}
.nav-cta{display:inline-flex;align-items:center;height:44px;padding:0 24px;background:var(--blue);color:#fff !important;font-size:14px;font-weight:300;letter-spacing:0.1em;border-radius:var(--radius);transition:background 0.2s}
.nav-cta:hover{background:var(--blue-light)}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px;background:none;border:none}
.nav-toggle span{display:block;width:22px;height:1px;background:var(--ink);transition:all 0.3s}
.nav-mobile{display:none}

/* ─── Hero — 科技感左右分割 ─── */
/* 左侧暗蓝技术感面板 + 右侧主内容 */
.hero-section{padding-top:80px;min-height:100dvh;display:grid;grid-template-columns:0.45fr 1fr;overflow:hidden}
.hero-left{background:var(--bg-dark);display:flex;flex-direction:column;justify-content:center;align-items:center;position:relative;overflow:hidden;padding:80px 40px}
.hero-left::before{content:'合肥';font-family:var(--font-sans);font-size:clamp(8rem,14vw,12rem);font-weight:300;color:rgba(42,106,176,0.08);position:absolute;bottom:-20px;left:-20px;line-height:1;letter-spacing:0;white-space:nowrap}
.hero-grid-lines{position:absolute;inset:0;background-image:linear-gradient(var(--border-dark) 1px,transparent 1px),linear-gradient(90deg,var(--border-dark) 1px,transparent 1px);background-size:40px 40px;opacity:0.4}
.hero-left-content{position:relative;z-index:1;text-align:center}
.hero-city-label{font-size:14px;font-weight:300;letter-spacing:0.2em;color:var(--on-dark-muted);margin-bottom:16px;text-transform:uppercase}
.hero-city-en{font-family:var(--font-num);font-style:italic;font-size:clamp(1.5rem,3vw,2.5rem);color:var(--blue-bright);opacity:0.7;line-height:1}
.hero-left-stats{margin-top:48px;display:flex;flex-direction:column;gap:24px;width:100%}
.hero-left-stat{border-left:2px solid var(--blue-bright);padding-left:16px}
.hero-left-stat-num{font-family:var(--font-num);font-style:italic;font-size:1.75rem;color:var(--blue-bright);line-height:1;margin-bottom:4px}
.hero-left-stat-label{font-size:14px;color:var(--on-dark-muted)}

.hero-right{display:flex;flex-direction:column;justify-content:center;padding:80px 64px}
.hero-eyebrow{display:flex;align-items:center;gap:12px;margin-bottom:32px}
.hero-eyebrow-square{width:8px;height:8px;background:var(--blue);flex-shrink:0}
.hero-title{margin-bottom:24px}
.hero-title em{color:var(--blue);font-style:normal}
.hero-body{color:var(--ink-light);max-width:44ch;margin-bottom:40px}
.hero-cta{display:flex;gap:16px;align-items:center;flex-wrap:wrap}
.btn-primary{display:inline-flex;align-items:center;height:48px;padding:0 32px;background:var(--blue);color:var(--on-dark);font-size:14px;font-weight:300;letter-spacing:0.1em;border-radius:var(--radius);transition:background 0.2s;white-space:nowrap}
.btn-primary:hover{background:var(--blue-light)}
.btn-ghost{display:inline-flex;align-items:center;height:48px;padding:0 24px;border:1px solid var(--border);color:var(--ink-light);font-size:14px;font-weight:300;letter-spacing:0.04em;border-radius:var(--radius);transition:border-color 0.2s,color 0.2s}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue)}

/* ─── Trust Strip C — 深色双列带序号 ─── */
.trust-strip{background:var(--bg-dark);padding:64px 0}
.trust-grid-c{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--border-dark)}
.trust-item-c{background:var(--bg-dark);padding:40px;position:relative}
.trust-item-c::before{content:attr(data-index);position:absolute;top:16px;right:20px;font-size:12px;font-weight:300;letter-spacing:0.12em;color:var(--on-dark-faint);font-family:var(--font-num);font-style:italic}
.trust-item-c-border{border-top:1px solid var(--blue-bright);padding-top:24px}
.trust-num-c{font-family:var(--font-num);font-style:italic;font-size:clamp(2rem,3.5vw,3rem);color:var(--blue-bright);line-height:1;margin-bottom:8px}
.trust-label-c{font-size:16px;font-weight:300;color:var(--on-dark);margin-bottom:6px;letter-spacing:0.04em}
.trust-sub-c{font-size:14px;color:var(--on-dark-muted)}

/* ─── About ─── */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:start}
.about-header{margin-bottom:32px}
.about-body{color:var(--ink-light)}
.about-body p{margin-bottom:20px;max-width:44ch}
.about-features{display:flex;flex-direction:column}
.about-feature-item{display:flex;gap:20px;padding:24px 0;border-bottom:1px solid var(--border)}
.about-feature-item:first-child{border-top:1px solid var(--border)}
.about-feature-num{font-family:var(--font-num);font-style:italic;font-size:18px;color:var(--blue-bright);flex-shrink:0;padding-top:2px}
.about-feature-title{font-size:16px;font-weight:300;margin-bottom:6px}
.about-feature-desc{font-size:14px;color:var(--ink-muted)}

/* ─── Services ─── */
.services-section{background:var(--bg-alt)}
.services-header{margin-bottom:48px}
.service-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:16px}
.service-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:40px 32px;position:relative;overflow:hidden}
.service-card::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:var(--blue)}
.service-card-num{font-family:var(--font-num);font-style:italic;font-size:2.5rem;color:var(--blue);opacity:0.1;line-height:1;margin-bottom:16px}
.service-card-title{font-size:18px;font-weight:300;margin-bottom:12px;letter-spacing:0.02em}
.service-card-desc{font-size:14px;color:var(--ink-muted);line-height:1.85}
.service-vip{display:grid;grid-template-columns:1fr auto;gap:40px;align-items:center;background:var(--blue);color:var(--on-dark);padding:40px 48px;border-radius:var(--radius)}
.service-vip-text .t-label{color:var(--on-dark-muted)}
.service-vip-title{font-family:var(--font-sans);font-size:clamp(1.25rem,2vw,1.625rem);font-weight:300;color:var(--on-dark);margin:12px 0;letter-spacing:0.02em}
.service-vip-desc{font-size:14px;color:var(--on-dark-muted);max-width:48ch}
.service-vip-cta{display:inline-flex;align-items:center;height:48px;padding:0 32px;background:var(--on-dark);color:var(--blue);font-size:14px;letter-spacing:0.1em;border-radius:var(--radius);white-space:nowrap;transition:background 0.2s;font-weight:300}
.service-vip-cta:hover{background:rgba(230,238,248,0.85)}

/* ─── Profiles ─── */
.profiles-header{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:48px}
.profiles-bento{display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:280px 200px;gap:16px}
.profile-card{background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;position:relative}
.profile-card-wide{grid-column:span 2}
.profile-card-tall{grid-row:span 2}
.profile-img-wrap{position:absolute;inset:0;overflow:hidden}
.profile-img-wrap img{width:100%;height:100%;object-fit:cover;object-position:top;transition:transform 0.5s}
.profile-card:hover .profile-img-wrap img{transform:scale(1.04)}
.profile-body{position:absolute;bottom:0;left:0;right:0;background:linear-gradient(to top,rgba(10,18,32,0.9) 0%,transparent 100%);padding:20px 24px;color:var(--on-dark)}
.profile-name{font-size:16px;font-weight:300;margin-bottom:2px;letter-spacing:0.04em}
.profile-sub{font-size:14px;color:var(--on-dark-muted)}
.profile-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.profile-tag{font-size:14px;color:var(--on-dark-faint);border:1px solid rgba(90,120,160,0.25);padding:2px 8px;border-radius:var(--radius-sm)}
.profiles-cta-bar{display:flex;justify-content:space-between;align-items:center;padding:24px 40px;background:var(--bg-alt);border:1px solid var(--border);margin-top:16px;border-radius:var(--radius)}
.profiles-cta-bar p{font-size:14px;color:var(--ink-muted)}
.profiles-cta-bar p strong{color:var(--ink)}

/* ─── CTA ─── */
.cta-section{background:var(--bg-dark);text-align:center;padding:96px 0;position:relative;overflow:hidden}
.cta-section::before{content:'';position:absolute;inset:0;background-image:linear-gradient(var(--border-dark) 1px,transparent 1px),linear-gradient(90deg,var(--border-dark) 1px,transparent 1px);background-size:48px 48px;opacity:0.3}
.cta-section .t-label{color:var(--blue-bright);margin-bottom:16px;position:relative}
.cta-title{font-family:var(--font-sans);font-size:clamp(1.75rem,3.5vw,3rem);font-weight:300;color:var(--on-dark);margin-bottom:24px;position:relative}
.cta-body{font-size:16px;color:var(--on-dark-muted);max-width:44ch;margin:0 auto 40px;position:relative}
.cta-group{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;position:relative}
.btn-cta{display:inline-flex;align-items:center;height:52px;padding:0 40px;background:var(--blue);color:var(--on-dark);font-size:14px;font-weight:300;letter-spacing:0.1em;border-radius:var(--radius);transition:background 0.2s}
.btn-cta:hover{background:var(--blue-light)}
.btn-cta-outline{display:inline-flex;align-items:center;height:52px;padding:0 32px;border:1px solid rgba(90,120,160,0.3);color:var(--on-dark-muted);font-size:14px;letter-spacing:0.04em;border-radius:var(--radius);transition:border-color 0.2s}
.btn-cta-outline:hover{border-color:var(--blue-bright);color:var(--blue-bright)}

/* ─── Blog ─── */
.blog-header{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:48px}
.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.blog-card{background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius);padding:32px;display:flex;flex-direction:column;transition:border-color 0.2s}
.blog-card:hover{border-color:var(--blue)}
.blog-card-tag{font-size:14px;color:var(--blue);letter-spacing:0.1em;margin-bottom:16px}
.blog-card-title{font-size:18px;font-weight:300;line-height:1.5;margin-bottom:12px;flex:1;letter-spacing:0.02em}
.blog-card-meta{font-size:14px;color:var(--ink-muted);margin-top:24px;display:flex;justify-content:space-between}

/* ─── FAQ ─── */
.faq-section{background:var(--bg-alt)}
.faq-header{margin-bottom:48px}
.faq-list{display:flex;flex-direction:column;gap:1px;background:var(--border)}
.faq-item{background:var(--bg)}
details.faq-item summary{display:flex;justify-content:space-between;align-items:center;padding:24px 32px;cursor:pointer;list-style:none;font-size:16px;font-weight:300;color:var(--ink);transition:color 0.2s;gap:16px}
details.faq-item summary::-webkit-details-marker{display:none}
details.faq-item summary::after{content:'+';font-family:var(--font-num);font-style:normal;font-size:20px;color:var(--blue);flex-shrink:0;transition:transform 0.3s}
details.faq-item[open] summary{color:var(--blue)}
details.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-answer{padding:0 32px 24px;color:var(--ink-muted);font-size:14px;line-height:1.85;max-width:64ch}

/* ─── Footer D — 居中极简 ─── */
.footer{background:var(--bg-dark);padding:64px 0 40px}
.footer-center{text-align:center;padding-bottom:48px;border-bottom:1px solid var(--border-dark)}
.footer-brand-name{font-family:var(--font-sans);font-size:16px;font-weight:300;color:var(--on-dark);letter-spacing:0.1em;margin-bottom:16px}
.footer-brand-name span{color:var(--blue-bright)}
.footer-brand-desc{font-size:14px;color:var(--on-dark-muted);max-width:44ch;margin:0 auto 32px;line-height:1.85}
.footer-nav-row{display:flex;justify-content:center;gap:32px;flex-wrap:wrap}
.footer-nav-row a{font-size:14px;font-weight:300;color:var(--on-dark-muted);transition:color 0.2s;letter-spacing:0.04em}
.footer-nav-row a:hover{color:var(--blue-bright)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:32px;flex-wrap:wrap;gap:8px}
.footer-copy{font-size:14px;color:var(--on-dark-faint)}
.footer-adult{font-size:14px;color:var(--on-dark-faint);text-align:center;width:100%}

/* ─── Mobile Nav ─── */
@media(max-width:767px){
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .nav-mobile{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:var(--bg);z-index:99;padding:80px 40px 40px;flex-direction:column;gap:0}
  .nav-mobile.open{display:flex}
  .nav-mobile a{font-size:18px;font-weight:300;letter-spacing:0.04em;color:var(--ink);padding:20px 0;border-bottom:1px solid var(--border)}
  .nav-mobile .nav-cta{margin-top:32px;width:100%;justify-content:center}
}

/* ─── Responsive ─── */
@media(max-width:1024px){
  .hero-section{grid-template-columns:1fr;min-height:auto}
  .hero-left{display:none}
  .hero-right{padding:80px 0 40px}
  .about-grid{grid-template-columns:1fr;gap:48px}
  .service-cards{grid-template-columns:1fr 1fr}
  .profiles-bento{grid-template-columns:repeat(2,1fr);grid-template-rows:auto}
  .profile-card-wide,.profile-card-tall{grid-column:auto;grid-row:auto}
  .profile-img-wrap{position:relative;height:240px}
  .profile-body{position:relative;padding:16px;background:none;color:var(--ink)}
  .profile-name,.profile-sub{color:var(--ink)}
  .profile-tag{color:var(--ink-muted);border-color:var(--border)}
  .blog-grid{grid-template-columns:1fr 1fr}
}

@media(max-width:767px){
  .container{padding:0 24px}
  .section{padding:64px 0}
  .t-hero{font-size:2rem}
  .t-h2{font-size:1.5rem}
  body{font-size:14px}
  /* Trust Strip — 2×2 */
  .trust-grid-c{grid-template-columns:1fr 1fr}
  .trust-item-c{padding:24px 20px}
  .trust-num-c{font-size:1.75rem}
  /* Services */
  .service-cards{grid-template-columns:1fr}
  .service-vip{grid-template-columns:1fr;gap:24px;padding:24px}
  /* Profiles */
  .profiles-bento{grid-template-columns:1fr}
  .profiles-cta-bar{flex-direction:column;gap:16px;text-align:center;padding:24px}
  /* Blog */
  .blog-grid{grid-template-columns:1fr}
  .blog-header{flex-direction:column;align-items:flex-start;gap:16px}
  /* Footer */
  .footer-nav-row{gap:16px}
  .footer-bottom{flex-direction:column;align-items:center;text-align:center;gap:8px}
  /* CTA & Buttons */
  .cta-group{flex-direction:column;align-items:center}
  .btn-cta,.btn-cta-outline,.btn-primary,.btn-ghost{width:100%;justify-content:center}
  .profiles-header{flex-direction:column;align-items:flex-start;gap:16px}
}