:root{
  --primary:#FF6B2C;
  --primary-d:#E8541A;
  --primary-l:#FFF0E6;
  --ink:#222;
  --ink-2:#666;
  --ink-3:#999;
  --line:#EEE;
  --bg:#F6F6F6;
  --card:#FFF;
  --radius:16px;
  --shadow:0 4px 18px rgba(0,0,0,.06);
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ===== Header ===== */
.topbar{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.topbar-inner{display:flex;align-items:center;gap:18px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--ink)}
.brand-logo{width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,#FF9A6C,var(--primary));display:flex;align-items:center;justify-content:center;font-size:20px;box-shadow:0 4px 10px rgba(255,107,44,.35)}
.brand-name{letter-spacing:1px}
.nav{display:flex;gap:6px;margin-left:8px}
.nav-link{padding:8px 14px;border-radius:20px;font-size:15px;color:var(--ink-2);transition:.2s}
.nav-link:hover{color:var(--primary);background:var(--primary-l)}
.nav-link.active{color:var(--primary);background:var(--primary-l);font-weight:600}
.search{margin-left:auto;position:relative;flex:1;max-width:240px}
.search input{width:100%;height:38px;border:1px solid var(--line);border-radius:20px;background:var(--bg);padding:0 16px 0 38px;font-size:14px;outline:none;transition:.2s}
.search input:focus{border-color:var(--primary);background:#fff}
.search:before{content:"🔍";position:absolute;left:14px;top:50%;transform:translateY(-50%);font-size:13px;opacity:.6}
.nav-toggle{display:none;border:none;background:none;font-size:22px;cursor:pointer;padding:6px}

/* ===== Page head ===== */
.page-home,.page-experts{padding:28px 0 60px}
.page-head{margin-bottom:22px}
.page-title{font-size:26px;font-weight:800}
.page-sub{color:var(--ink-2);font-size:14px;margin-top:6px}

/* ===== Note grid (masonry) ===== */
.note-grid{column-count:4;column-gap:16px}
@media(max-width:1100px){.note-grid{column-count:3}}
@media(max-width:760px){.note-grid{column-count:2}}
@media(max-width:480px){.note-grid{column-count:1}}
.note-card{break-inside:avoid;margin-bottom:16px;background:var(--card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);cursor:pointer;transition:transform .25s,box-shadow .25s}
.note-card:hover{transform:translateY(-4px);box-shadow:0 10px 26px rgba(0,0,0,.12)}
.note-cover-wrap{position:relative;overflow:hidden;background:#000}
.note-cover{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700}
.note-cover-video{display:block;width:100%;height:100%;object-fit:cover;background:#000;pointer-events:none}
.note-cover-img{display:block;width:100%;height:100%;object-fit:cover}
.note-cover-icon{font-size:54px;opacity:.9;text-shadow:0 2px 8px rgba(0,0,0,.2)}
.note-badge{position:absolute;left:10px;bottom:10px;background:rgba(0,0,0,.55);color:#fff;font-size:12px;padding:3px 8px;border-radius:8px;backdrop-filter:blur(2px)}
.note-badge-img{background:rgba(255,107,44,.85)}
.note-body{padding:12px 14px}
.note-title{font-size:15px;font-weight:600;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:42px}
.note-foot{display:flex;align-items:center;gap:8px;margin-top:10px;font-size:12px;color:var(--ink-3)}
.note-avatar{width:22px;height:22px;border-radius:50%;object-fit:cover}
.note-author{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.note-like{color:var(--primary)}

/* gradient covers */
.grad-g1{background:linear-gradient(135deg,#FF8E6B,#FF5C2C)}
.grad-g2{background:linear-gradient(135deg,#FFB88C,#FF7E3F)}
.grad-g3{background:linear-gradient(135deg,#FF9A6C,#FF6B2C)}
.grad-g4{background:linear-gradient(135deg,#FFCDAE,#FF8A50)}
.grad-g5{background:linear-gradient(135deg,#FF7E5F,#FF4E3D)}
.grad-g6{background:linear-gradient(135deg,#FFD3A5,#FF9F50)}

/* ===== Experts list ===== */
.expert-list{display:grid;grid-template-columns:1fr;gap:24px}
.expert-card{display:flex;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.expert-cover{width:220px;min-height:260px;flex-shrink:0;display:flex;align-items:center;justify-content:center;position:relative}
.expert-cover .expert-avatar{width:120px;height:120px;border-radius:50%;border:5px solid #fff;object-fit:cover;box-shadow:0 6px 18px rgba(0,0,0,.18)}
.expert-info{padding:24px 28px;flex:1;display:flex;flex-direction:column}
.expert-name{font-size:22px;font-weight:800;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.expert-title{font-size:13px;font-weight:500;color:var(--primary);background:var(--primary-l);padding:3px 10px;border-radius:10px}
.expert-role{color:var(--ink-2);font-size:14px;margin-top:6px;font-weight:600}
.expert-intro{color:var(--ink-2);font-size:14px;margin-top:12px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.expert-tags{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 18px}
.tag{font-size:12px;color:var(--ink-2);background:var(--bg);padding:5px 12px;border-radius:14px}
.expert-card .btn-primary{align-self:flex-start}

/* ===== Buttons ===== */
.btn-primary{display:inline-flex;align-items:center;gap:6px;background:var(--primary);color:#fff;padding:10px 22px;border-radius:24px;font-size:14px;font-weight:600;transition:.2s;cursor:pointer;border:none}
.btn-primary:hover{background:var(--primary-d);transform:translateY(-2px)}
.btn-primary.light{background:#fff;color:var(--primary)}
.btn-primary.light:hover{background:#fff5ef}

/* ===== Expert profile ===== */
.profile-banner{height:200px;background:linear-gradient(135deg,#FF9A6C,#FF4E3D);position:relative}
.profile-head{max-width:1200px;margin:0 auto;padding:0 20px;position:relative}
.profile-avatar{width:108px;height:108px;border-radius:50%;border:5px solid #fff;object-fit:cover;margin-top:-58px;box-shadow:0 6px 18px rgba(0,0,0,.18);background:#fff}
.profile-meta{margin-top:14px}
.profile-name{font-size:24px;font-weight:800;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.profile-role{color:var(--ink-2);margin-top:4px;font-size:14px}
.profile-badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.profile-badges .tag{background:var(--primary-l);color:var(--primary-d)}
.profile-intro{color:var(--ink-2);max-width:780px;margin-top:14px;font-size:14px}
.profile-stats{display:flex;gap:34px;margin-top:18px;flex-wrap:wrap}
.profile-stat .num{font-size:22px;font-weight:800;color:var(--ink)}
.profile-stat .lab{font-size:13px;color:var(--ink-3)}
.profile-section{padding:8px 0 60px}
.profile-tabs{border-bottom:1px solid var(--line);margin-top:24px}
.profile-tab{padding:12px 4px;margin-right:28px;font-size:15px;color:var(--ink-2);border-bottom:2px solid transparent;cursor:pointer}
.profile-tab.active{color:var(--primary);border-color:var(--primary);font-weight:600}
.profile-empty{padding:80px 0;text-align:center;color:var(--ink-3)}

/* ===== Modal ===== */
.modal[hidden]{display:none!important}
.modal{position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center;padding:24px}
.modal-mask{position:absolute;inset:0;background:rgba(0,0,0,.6);backdrop-filter:blur(4px)}
.modal-box{position:relative;width:min(960px,100%);max-height:90vh;background:#fff;border-radius:18px;overflow:hidden;display:flex}
.modal-close{position:absolute;top:12px;right:12px;z-index:5;width:34px;height:34px;border-radius:50%;border:none;background:rgba(0,0,0,.4);color:#fff;font-size:20px;cursor:pointer}
.modal-media{flex:1;background:#000;min-width:0;display:flex;align-items:center;justify-content:center}
.modal-media video{width:100%;height:100%;object-fit:contain;max-height:90vh}
.modal-side{width:360px;flex-shrink:0;padding:22px 24px;overflow-y:auto;display:flex;flex-direction:column}
.modal-author{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.modal-author img{width:40px;height:40px;border-radius:50%;object-fit:cover}
.modal-author .ma-name{font-weight:700}
.modal-author .ma-role{font-size:12px;color:var(--ink-3)}
.modal-title{font-size:19px;font-weight:700;line-height:1.45}
.modal-meta{color:var(--ink-3);font-size:13px;margin:10px 0}
.modal-summary{color:var(--ink-2);font-size:14px;margin-top:6px}
.modal-image-mode{display:block;width:100%;max-width:620px;margin:0 auto;padding:24px}
.modal-content-block{margin:14px 0}
.modal-content-block p{color:var(--ink-2);font-size:15px;white-space:pre-line}
.modal-content-img{width:100%;border-radius:12px;display:block}
.modal-content-image{height:200px;border-radius:12px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:600;letter-spacing:1px}
@media(max-width:760px){
  .modal-box{flex-direction:column}
  .modal-side{width:100%;max-height:38vh}
}

/* ===== Empty state ===== */
.empty-state{text-align:center;padding:60px 0;color:var(--ink-3)}
.empty-state.big{padding:90px 0}
.empty-emoji{font-size:56px;margin-bottom:12px}
.empty-title{font-size:22px;color:var(--ink);margin-bottom:8px}
.empty-desc{margin-bottom:22px}

/* ===== Footer ===== */
.footer{background:#1f1f1f;color:#bbb;padding:40px 0 28px;margin-top:40px}
.footer-brand{font-size:18px;font-weight:700;color:#fff;margin-bottom:8px}
.footer-desc{font-size:13px;color:#888;margin-bottom:18px}
.footer-links{display:flex;flex-wrap:wrap;gap:20px;margin-bottom:18px}
.footer-links a{font-size:13px;color:#aaa}
.footer-links a:hover{color:var(--primary)}
.footer-copy{border-top:1px solid #333;padding-top:18px;font-size:12px;color:#777;text-align:center}
.footer-copy p{margin:4px 0}
.footer-icp a{color:#aaa;transition:color .2s}
.footer-icp a:hover{color:var(--primary)}
.footer-copy .icp-link{margin-left:14px;color:#aaa}
.footer-copy .icp-link:hover{color:var(--primary)}

/* ===== About ===== */
.page-about{background:#fff}
.about-hero{background:linear-gradient(135deg,#FF9A6C,#FF4E3D);color:#fff;padding:70px 0}
.about-hero-inner{display:flex;flex-direction:column;align-items:flex-start;gap:10px}
.about-tag{font-size:13px;letter-spacing:3px;opacity:.9}
.about-hero h1{font-size:40px;font-weight:800}
.about-slogan{font-size:16px;opacity:.95}
.about-section{padding:50px 0}
.section-eyebrow{display:inline-block;font-size:12px;letter-spacing:3px;color:var(--primary);font-weight:700;margin-bottom:6px}
.section-title{font-size:28px;font-weight:800;margin-bottom:18px}
.about-story{max-width:820px;color:var(--ink-2);font-size:15px}
.about-story p{margin-bottom:12px}
.about-story strong{color:var(--ink)}
.cert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:26px}
.cert-card{background:var(--bg);border-radius:14px;padding:24px 18px;text-align:center}
.cert-icon{font-size:34px;margin-bottom:10px}
.cert-card h3{font-size:15px;margin-bottom:6px}
.cert-card p{font-size:13px;color:var(--ink-3)}
.timeline{position:relative;margin-top:20px;border-left:2px solid var(--primary-l);padding-left:28px}
.tl-item{position:relative;padding-bottom:26px}
.tl-item:before{content:"";position:absolute;left:-37px;top:4px;width:14px;height:14px;border-radius:50%;background:var(--primary);border:3px solid #fff;box-shadow:0 0 0 2px var(--primary)}
.tl-item.future:before{background:#fff;box-shadow:0 0 0 2px var(--ink-3)}
.tl-date{font-size:13px;color:var(--primary);font-weight:700}
.tl-item h3{font-size:17px;margin:4px 0}
.tl-item p{color:var(--ink-2);font-size:14px;max-width:640px}
.tl-tag{display:inline-block;margin-top:8px;font-size:12px;color:var(--ink-2);background:var(--bg);padding:4px 12px;border-radius:12px}
.about-stats{background:var(--primary);color:#fff;padding:50px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat-num{font-size:34px;font-weight:800}
.stat-label{font-size:13px;opacity:.9;margin-top:4px}
.branch-links{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:24px 0 26px}
.branch-card{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px 18px;border-radius:14px;color:#fff;text-align:center;overflow:hidden;min-height:140px;transition:transform .25s,box-shadow .25s}
.branch-card:hover{transform:translateY(-4px);box-shadow:0 10px 26px rgba(0,0,0,.18)}
.branch-emoji{font-size:38px;filter:drop-shadow(0 2px 6px rgba(0,0,0,.2))}
.branch-name{font-size:20px;font-weight:800;margin-top:8px;letter-spacing:1px}
.branch-sub{font-size:13px;opacity:.95;margin-top:4px}
.branch-arrow{margin-top:10px;font-size:13px;font-weight:600;background:rgba(255,255,255,.22);padding:5px 14px;border-radius:14px;backdrop-filter:blur(2px)}
.branch-card:after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(255,255,255,.18),transparent 50%);pointer-events:none}
@media(max-width:760px){.branch-links{grid-template-columns:1fr}}
.partner-list{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:24px}
.partner-card{display:flex;flex-direction:column;background:#fff;border-radius:14px;overflow:hidden;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.partner-card:hover{transform:translateY(-4px);box-shadow:0 10px 26px rgba(0,0,0,.12)}
.partner-media{position:relative;height:140px;display:flex;align-items:center;justify-content:center}
.partner-emoji{font-size:44px;filter:drop-shadow(0 2px 6px rgba(0,0,0,.2))}
.partner-tag{position:absolute;left:10px;bottom:10px;background:rgba(0,0,0,.5);color:#fff;font-size:12px;padding:3px 10px;border-radius:8px}
.partner-body{padding:18px 20px;display:flex;flex-direction:column;flex:1}
.partner-body h3{font-size:16px;font-weight:700;margin-bottom:8px;line-height:1.4}
.partner-body p{font-size:13px;color:var(--ink-2);flex:1;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}
.partner-link{margin-top:14px;color:var(--primary);font-size:14px;font-weight:600}
.partner-card:hover .partner-link{color:var(--primary-d)}
@media(max-width:760px){.partner-list{grid-template-columns:1fr}}
.about-cta{background:var(--primary-l);text-align:center;padding:60px 0}
.about-cta h2{font-size:26px;font-weight:800;color:var(--primary-d)}
.about-cta p{color:var(--ink-2);margin:10px 0 22px}
@media(max-width:760px){
  .cert-grid,.stats-grid{grid-template-columns:repeat(2,1fr)}
  .expert-card{flex-direction:column}
  .expert-cover{width:100%;min-height:180px}
  .about-hero h1{font-size:30px}
}

/* ===== Mobile nav ===== */
@media(max-width:760px){
  .nav-toggle{display:block}
  .nav{position:fixed;top:64px;left:0;right:0;background:#fff;flex-direction:column;padding:10px 20px;border-bottom:1px solid var(--line);transform:translateY(-150%);transition:transform .25s;z-index:40}
  .nav.open{transform:translateY(0)}
  .search{max-width:none;order:3}
  .topbar-inner{flex-wrap:wrap;height:auto;padding:10px 20px;gap:12px}
  .brand{order:1}
  .nav-toggle{order:2;margin-left:auto}
}