/* ===== RESET ===== */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#1A56DB;
  --primary-light:#EFF6FF;
  --accent:#F97316;
  --accent-light:#FFF7ED;
  --success:#10B981;
  --bg:#F8FAFC;
  --card:#FFFFFF;
  --text:#1E293B;
  --text2:#64748B;
  --border:#E2E8F0;
  --shadow:0 2px 12px rgba(0,0,0,0.07);
  --radius:16px;
  --radius-sm:10px;
}
body{font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;color:var(--text);background:var(--bg);line-height:1.6}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* ===== HEADER ===== */
.site-header{background:var(--card);box-shadow:0 1px 3px rgba(0,0,0,0.06);position:sticky;top:0;z-index:100}
.header-inner{display:flex;align-items:center;height:68px;gap:32px}
.logo{display:flex;align-items:center;gap:8px;flex-shrink:0}
.logo-icon{font-size:28px}
.logo-text{font-size:20px;font-weight:800;color:var(--text)}
.header-nav{display:flex;gap:4px;flex:1}
.header-nav a{padding:8px 16px;border-radius:8px;font-size:14px;font-weight:500;color:var(--text2);transition:all 0.2s}
.header-nav a:hover,.header-nav a.active{background:var(--primary);color:#fff}
.header-actions{display:flex;gap:10px;flex-shrink:0}

/* ===== USER MENU ===== */
.user-menu{position:relative;display:flex;align-items:center}
.user-info{display:flex;align-items:center;gap:8px;padding:8px 14px;background:var(--primary-light);border-radius:50px;cursor:pointer;transition:all 0.2s}
.user-info:hover{background:#DBEAFE}
.user-avatar{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,var(--primary),#3B82F6);display:flex;align-items:center;justify-content:center;color:#fff;font-size:14px;font-weight:700}
.user-name{font-size:14px;font-weight:600;color:var(--text)}
.user-dropdown{position:absolute;top:calc(100% + 8px);right:0;background:var(--card);border:1.5px solid var(--border);border-radius:12px;box-shadow:0 8px 32px rgba(0,0,0,0.12);min-width:160px;padding:6px 0;opacity:0;visibility:hidden;transform:translateY(-8px);transition:all 0.2s;z-index:200}
.user-menu:hover .user-dropdown,.user-menu.show .user-dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.user-dropdown a{display:block;padding:10px 16px;font-size:14px;color:var(--text);transition:all 0.15s}
.user-dropdown a:hover{background:var(--primary-light);color:var(--primary)}
.user-dropdown .divider{height:1px;background:var(--border);margin:6px 0}
.user-dropdown a.logout{color:#EF4444}
.user-dropdown a.logout:hover{background:#FEF2F2;color:#DC2626}

/* ===== BUTTONS ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 22px;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;border:none;transition:all 0.2s;white-space:nowrap}
.btn-primary{background:var(--primary);color:#fff;padding:10px 22px}
.btn-primary:hover{background:#1447C0;transform:translateY(-1px)}
.btn-outline{background:#fff;color:var(--primary);border:1.5px solid var(--primary);padding:10px 22px}
.btn-outline:hover{background:var(--primary);color:#fff}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#ea6d0b}
.btn-white{background:#fff;color:var(--accent);border:none;font-size:15px;font-weight:700;padding:14px 32px;border-radius:50px;box-shadow:0 4px 16px rgba(249,115,22,0.3);cursor:pointer}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(249,115,22,0.35)}

/* ===== HERO ===== */
.hero{background:linear-gradient(135deg,#1A56DB 0%,#3B82F6 50%,#60A5FA 100%);color:#fff;padding:80px 0;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;top:-60px;right:-60px;width:500px;height:500px;background:rgba(255,255,255,0.05);border-radius:50%}
.hero::after{content:"";position:absolute;bottom:-80px;left:-40px;width:400px;height:400px;background:rgba(255,255,255,0.03);border-radius:50%}
.hero-inner{position:relative;z-index:1;text-align:center}
.hero-badge{display:inline-block;background:rgba(255,255,255,0.15);padding:6px 18px;border-radius:50px;font-size:13px;margin-bottom:24px;border:1px solid rgba(255,255,255,0.2)}
.hero-title{font-size:56px;font-weight:900;line-height:1.2;margin-bottom:18px;letter-spacing:-1px}
.hero-title .highlight{color:#FCD34D;text-shadow:0 2px 12px rgba(0,0,0,0.15)}
.hero-sub{font-size:18px;opacity:0.9;margin-bottom:36px;line-height:1.8}
.hero-search{display:flex;max-width:560px;margin:0 auto 20px;border-radius:50px;overflow:hidden;box-shadow:0 8px 32px rgba(0,0,0,0.15)}
.hero-search input{flex:1;border:none;outline:none;padding:16px 24px;font-size:15px}
.hero-search button{width:120px;background:var(--accent);color:#fff;border:none;font-size:15px;font-weight:700;cursor:pointer}
.hero-search button:hover{background:#ea6d0b}
.hero-tags{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.hero-tags span{font-size:13px;color:rgba(255,255,255,0.75);cursor:pointer;padding:4px 12px;border:1px solid rgba(255,255,255,0.25);border-radius:50px;transition:all 0.2s}
.hero-tags span:hover{background:rgba(255,255,255,0.15);color:#fff}

/* ===== STATS ===== */
.stats-bar{background:var(--card);padding:28px 0;border-bottom:1px solid var(--border)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.stat-item{text-align:center;padding:8px 0;border-right:1px solid var(--border)}
.stat-item:last-child{border-right:none}
.stat-num{font-size:28px;font-weight:900;color:var(--primary)}
.stat-label{font-size:13px;color:var(--text2);margin-top:2px}

/* ===== SECTION ===== */
.section{padding:60px 0}
.section-gray{background:var(--bg)}
.section-header{display:flex;align-items:center;gap:16px;margin-bottom:32px}
.section-title{font-size:22px;font-weight:800;flex-shrink:0;padding-right:16px;border-right:3px solid var(--accent)}
.section-more{font-size:14px;color:var(--text2);margin-left:auto}
.section-more:hover{color:var(--primary)}

/* ===== CATEGORIES ===== */
.cat-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.cat-card{background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius);padding:24px 16px;text-align:center;transition:all 0.25s;display:block}
.cat-card:hover{border-color:var(--accent);transform:translateY(-4px);box-shadow:var(--shadow)}
.cat-icon{font-size:38px;margin-bottom:10px}
.cat-name{font-size:15px;font-weight:700;margin-bottom:4px}
.cat-desc{font-size:12px;color:var(--text2);margin-bottom:8px}
.cat-count{font-size:12px;color:var(--accent);font-weight:600}

/* ===== DEMAND CARDS ===== */
.filter-tabs{display:flex;gap:8px}
.filter-tab{padding:7px 16px;background:var(--card);border:1.5px solid var(--border);border-radius:50px;font-size:13px;font-weight:500;color:var(--text2);cursor:pointer;transition:all 0.2s}
.filter-tab.active,.filter-tab:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.demand-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.demand-card{background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius);padding:20px;transition:all 0.25s;cursor:pointer}
.demand-card:hover{border-color:var(--accent);box-shadow:var(--shadow);transform:translateY(-2px)}
.demand-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.demand-cat{padding:3px 10px;background:var(--primary-light);color:var(--primary);border-radius:6px;font-size:12px;font-weight:600}
.demand-area{font-size:12px;color:var(--text2)}
.demand-title{font-size:16px;font-weight:700;margin-bottom:8px;line-height:1.4}
.demand-desc{font-size:14px;color:var(--text2);margin-bottom:14px;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.demand-footer{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--border);padding-top:12px}
.demand-budget{font-size:22px;font-weight:900;color:var(--accent)}
.demand-meta{font-size:13px;color:var(--text2)}

/* ===== WHY US ===== */
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.why-card{background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius);padding:32px 24px;text-align:center;transition:all 0.2s}
.why-card:hover{border-color:var(--primary);transform:translateY(-4px);box-shadow:var(--shadow)}
.why-icon{font-size:44px;margin-bottom:14px}
.why-card h3{font-size:16px;font-weight:700;margin-bottom:10px}
.why-card p{font-size:14px;color:var(--text2);line-height:1.7}

/* ===== PROVIDER CTA ===== */
.provider-cta{background:linear-gradient(135deg,#0F172A 0%,#1E293B 100%);color:#fff;padding:72px 0}
.cta-inner{display:flex;align-items:center;gap:60px}
.cta-badge{display:inline-block;background:var(--accent);padding:4px 14px;border-radius:50px;font-size:12px;font-weight:700;margin-bottom:16px}
.cta-text h2{font-size:36px;font-weight:900;margin-bottom:14px}
.cta-text p{font-size:16px;opacity:0.75;margin-bottom:20px;line-height:1.7}
.cta-illus{display:flex;gap:16px;flex-shrink:0}
.cta-card{background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.12);border-radius:16px;padding:20px 24px;text-align:center;min-width:130px}
.cta-card strong{display:block;font-size:26px;font-weight:900;margin-top:4px}
.cta-card-2{background:rgba(249,115,22,0.2);border-color:rgba(249,115,22,0.3)}
.cta-card-3{background:rgba(16,185,129,0.2);border-color:rgba(16,185,129,0.3)}

/* ===== FOOTER ===== */
.site-footer{background:#0F172A;color:rgba(255,255,255,0.6);padding:52px 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;margin-bottom:36px}
.footer-logo{font-size:22px;font-weight:800;color:#fff;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.footer-brand p{font-size:14px;line-height:1.8;margin-bottom:12px}
.footer-contact{font-size:14px;color:var(--accent)}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:14px}
.footer-col a{display:block;font-size:13px;color:rgba(255,255,255,0.5);margin-bottom:10px;transition:color 0.2s}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding-top:20px;text-align:center;font-size:13px}

/* ===== LOADING ===== */
.loading,.empty{text-align:center;padding:48px;color:var(--text2)}

/* ===== RESPONSIVE ===== */
@media(max-width:1100px){.cat-grid{grid-template-columns:repeat(3,1fr)}.why-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:768px){.header-nav{display:none}.hero{padding:48px 0}.hero-title{font-size:32px}.cat-grid{grid-template-columns:repeat(2,1fr)}.stats-grid{grid-template-columns:repeat(2,1fr)}.demand-list{grid-template-columns:1fr}.cta-inner{flex-direction:column}.footer-grid{grid-template-columns:1fr}}
@media(max-width:480px){.hero-search{flex-direction:column;border-radius:16px}.hero-search button{width:100%}.cat-grid{grid-template-columns:1fr}}

.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.55);display:none;align-items:center;justify-content:center;z-index:1000}
.modal{background:#fff;border-radius:20px;width:440px;max-width:95vw;max-height:90vh;overflow-y:auto;box-shadow:0 24px 60px rgba(0,0,0,0.25)}
.modal-header{padding:20px 24px;border-bottom:1px solid #eee;display:flex;justify-content:space-between;align-items:center}
.modal-header h3{font-size:17px;font-weight:700}
.modal-close{width:32px;height:32px;border-radius:50%;background:#f5f5f5;border:none;cursor:pointer;font-size:18px;display:flex;align-items:center;justify-content:center;color:#666}
.modal-close:hover{background:#eee}
.modal-body{padding:24px}
.form-item{margin-bottom:16px}
.form-item label{display:block;margin-bottom:8px;font-size:14px;font-weight:600;color:var(--text)}
.form-item input{width:100%;padding:12px;border:1.5px solid var(--border);border-radius:10px;box-sizing:border-box;font-size:14px;transition:border-color 0.2s}
.form-item input:focus{border-color:var(--primary);outline:none}
.btn-full{width:100%;padding:12px}

/* ===== 报价列表 ===== */
.quote-item{background:#f8fafc;border:1px solid #e2e8f0;border-radius:12px;padding:16px;margin-bottom:12px;position:relative;display:flex;flex-wrap:wrap;gap:12px;align-items:flex-start}
.quote-item.accepted{border-color:#10B981;background:#ecfdf5}
.my-quote{border-left:4px solid #F97316}
.accepted-badge{position:absolute;top:12px;right:12px;background:#10B981;color:#fff;padding:4px 12px;border-radius:20px;font-size:12px;font-weight:600}
.quote-info{flex:1;min-width:200px}
.quote-provider{font-weight:700;font-size:16px;color:#1e293b;margin-bottom:8px}
.quote-details{background:#fff;border-radius:8px;padding:12px;margin-top:8px}
.quote-detail-item{margin-bottom:6px;font-size:14px}
.quote-detail-item .label{color:#64748b}
.quote-detail-item .value{color:#1e293b}
.quote-detail-item .price{color:#F97316;font-weight:700;font-size:18px}
.quote-price{font-size:20px;font-weight:700;color:#F97316}
.quote-price.hidden{color:#94a3b8}
.quote-action{margin-top:8px}
.btn-accept{background:#10B981;color:#fff;border:none;padding:10px 20px;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;transition:background 0.2s}
.btn-accept:hover{background:#059669}
.quote-empty{text-align:center;padding:32px;color:#64748b;font-size:15px}