@font-face{font-family:qa_system;src:local("PingFang SC");font-display:swap}:root{--primary:#c64600;--secondary:#8b3000;--accent:#1a5fb4;--bg:#fafafa;--card-bg:#ffffff;--text:#222;--text-muted:#8590a6;--border:#ebebeb;--shadow:0 12px 36px rgba(34,34,34,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:qa_system,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;line-height:1.75}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}.qa_skip{position:absolute;left:-9999px}.qa_skip:focus{left:16px;top:12px;z-index:99;background:var(--card-bg);padding:8px 14px}.qa_header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.94);border-bottom:1px solid var(--border);backdrop-filter:blur(14px)}.qa_nav{max-width:1180px;margin:auto;padding:12px 18px;display:flex;align-items:center;gap:24px}.qa_logo{color:var(--primary);font-weight:800;font-size:21px;white-space:nowrap}.qa_navlinks{display:flex;gap:18px;font-size:14px;flex:1}.qa_navlinks a:hover{color:var(--primary)}.qa_search{display:flex;border:1px solid var(--border);background:var(--bg);border-radius:999px;overflow:hidden}.qa_search input{border:0;background:transparent;padding:9px 14px;min-width:180px;outline:none}.qa_btn{border:0;border-radius:8px;padding:9px 15px;cursor:pointer;font-weight:650}.qa_btn_primary{background:var(--primary);color:#fff}.qa_btn_soft{background:#fff4ed;color:var(--secondary);border:1px solid #f1d6c6}.qa_btn_blue{background:#eef5ff;color:var(--accent);border:1px solid #d7e7ff}.qa_container{max-width:1180px;margin:auto;padding:28px 18px 64px}.qa_hero{display:grid;grid-template-columns:1.08fr .92fr;gap:28px;background:var(--card-bg);border:1px solid var(--border);border-radius:18px;overflow:hidden;box-shadow:var(--shadow)}.qa_hero_copy{padding:38px}.qa_kicker{color:var(--primary);font-size:13px;font-weight:800;letter-spacing:.12em}.qa_hero h1{font-size:clamp(30px,5vw,50px);line-height:1.15;margin:10px 0 16px}.qa_hero p{color:#515b6d}.qa_hero img{width:100%;height:100%;min-height:360px;object-fit:cover}.qa_actions{display:flex;flex-wrap:wrap;gap:9px;margin-top:20px}.qa_switch{display:flex;align-items:center;gap:8px;font-size:13px}.qa_switch input{accent-color:var(--primary)}.qa_tags{display:flex;align-items:center;gap:9px;overflow:auto;padding:24px 4px 14px}.qa_tag{white-space:nowrap;background:var(--card-bg);border:1px solid var(--border);border-radius:999px;padding:6px 12px;color:var(--accent)}.qa_tag_hot{font-size:18px;color:var(--primary);font-weight:700}.qa_layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:24px;align-items:start}.qa_masonry{columns:2;column-gap:16px}.qa_card{break-inside:avoid;margin:0 0 16px;background:var(--card-bg);border:1px solid var(--border);border-radius:14px;padding:20px;transition:.2s ease}.qa_card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:#e7c8b6}.qa_card_head{display:flex;justify-content:space-between;gap:12px}.qa_card h2,.qa_card h3{margin:0 0 8px;line-height:1.4}.qa_meta{display:flex;flex-wrap:wrap;gap:14px;color:var(--text-muted);font-size:13px}.qa_summary{max-height:48px;overflow:hidden;transition:max-height .3s}.qa_card:hover .qa_summary{max-height:170px}.qa_sidebar{position:sticky;top:84px}.qa_panel{background:var(--card-bg);border:1px solid var(--border);border-radius:14px;padding:18px;margin-bottom:16px}.qa_panel h2{font-size:18px;margin:0 0 12px}.qa_person{display:flex;align-items:center;gap:11px;padding:10px 0;border-top:1px solid var(--border)}.qa_avatar{width:42px;height:42px;border-radius:50%;object-fit:cover}.qa_section{margin-top:38px}.qa_section_header{display:flex;justify-content:space-between;align-items:end;gap:12px}.qa_section h2{font-size:28px;line-height:1.3}.qa_grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.qa_feature{background:var(--card-bg);border-top:3px solid var(--primary);padding:22px;border-radius:0 0 12px 12px}.qa_feature strong{display:block;font-size:18px}.qa_longform{max-width:850px}.qa_longform h2{margin-top:40px}.qa_longform h3{margin-top:28px}.qa_longform img{width:100%;border-radius:16px;margin:18px 0}.qa_answer{border-left:4px solid var(--accent);padding:2px 0 2px 18px;margin:22px 0}.qa_answer_body{max-height:145px;overflow:hidden;position:relative}.qa_answer_body.qa_open{max-height:none}.qa_answer_body:not(.qa_open):after{content:"";position:absolute;inset:auto 0 0;height:60px;background:linear-gradient(transparent,var(--bg))}.qa_form{display:grid;gap:14px;max-width:760px}.qa_form input,.qa_form textarea,.qa_form select{width:100%;border:1px solid var(--border);border-radius:9px;background:var(--card-bg);padding:12px;outline:none}.qa_form input:focus,.qa_form textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px #e6f0ff}.qa_timeline{border-left:2px solid var(--border);padding-left:24px}.qa_event{position:relative;margin-bottom:24px}.qa_event:before{content:"";position:absolute;left:-31px;top:8px;width:12px;height:12px;border-radius:50%;background:var(--primary)}.qa_footer{background:#25211e;color:#eee;padding:42px 18px}.qa_footer_grid{max-width:1180px;margin:auto;display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px}.qa_footer a{display:block;color:#c8c3bf;margin:6px 0}.qa_notice{background:#fff8e8;border:1px solid #f0dfb1;padding:12px 14px;border-radius:10px}.qa_hidden_low{display:none!important}.qa_toast{position:fixed;right:20px;bottom:20px;background:#222;color:#fff;padding:10px 16px;border-radius:9px;opacity:0;transform:translateY(8px);transition:.2s;z-index:50}.qa_toast.qa_show{opacity:1;transform:none}@media(max-width:900px){.qa_hero{grid-template-columns:1fr}.qa_hero img{min-height:240px}.qa_layout{grid-template-columns:1fr}.qa_sidebar{position:static}.qa_navlinks{display:none}.qa_grid3{grid-template-columns:1fr 1fr}}@media(max-width:640px){.qa_container{padding:16px 13px 50px}.qa_hero_copy{padding:25px}.qa_masonry{columns:1}.qa_grid3{grid-template-columns:1fr}.qa_search input{min-width:0;width:110px}.qa_footer_grid{grid-template-columns:1fr}.qa_hero h1{font-size:32px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}