/* ============ 发文站 全局主题（header/footer/服务卡片/按钮等共享样式）============ */
:root{
  --bg:oklch(98.5% 0.005 165);
  --surface:oklch(100% 0 0);
  --surface-2:oklch(97% 0.008 165);
  --green-soft:#f9fafb;
  --fg:oklch(22% 0.02 260);
  --muted:oklch(50% 0.01 260);
  --border:oklch(91% 0.005 260);
  --accent:oklch(38% 0.085 175);
  --accent-ink:oklch(30% 0.07 175);
  --accent-soft:oklch(95% 0.025 160);
  --success:oklch(55% 0.15 155);
  --danger:oklch(55% 0.17 25);
  --hero-orange:oklch(63% 0.20 40);
  --font:"PingFang SC",-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,"Microsoft YaHei",sans-serif;
  --mono:ui-monospace,"SF Mono","JetBrains Mono",Menlo,monospace;
  --r-card:20px; --r-sm:14px; --r-btn:8px;
  --shadow:0 1px 2px rgba(20,30,60,.04),0 8px 24px rgba(20,30,60,.06);
  --shadow-lg:0 2px 4px rgba(20,30,60,.05),0 20px 50px rgba(20,30,60,.10);
  --maxw:1280px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--fg);background:var(--bg);line-height:1.7;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-size:16px}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ============ 导航（全站统一）============ */
header{position:sticky;top:0;z-index:60;transition:box-shadow .28s,background .28s}
header.scrolled{background:oklch(100% 0 0 / .82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:0 1px 0 var(--border)}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:baseline;gap:7px;font-weight:600;font-size:18px;letter-spacing:-.01em}
.brand .mark{width:28px;height:28px;border-radius:8px;background:var(--accent);display:grid;place-items:center;color:#fff;align-self:center}
.nav-links{display:flex;gap:24px;position:absolute;left:50%;transform:translateX(-50%)}
.nav-links a{font-size:14.5px;color:var(--muted);font-weight:500;padding:8px 12px;border-radius:8px;transition:color .15s}
.nav-links a:hover{background:oklch(97% 0.003 260);color:var(--fg)}
.nav-links a.active{background:var(--accent-soft);color:var(--accent-ink);font-weight:500}
.nav-links a:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.nav-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.vip-link{display:flex;align-items:center;gap:5px;padding:8px 14px;font-size:14px;font-weight:500;
  color:var(--hero-orange);border-radius:8px;cursor:pointer;transition:background .15s}
.vip-link:hover{background:oklch(63% 0.20 40 / .08)}
.vip-link svg{width:15px;height:15px}
.login-link{display:flex;align-items:center;gap:4px;padding:8px 16px;font-size:14px;font-weight:500;
  color:var(--accent-ink);border:1px solid var(--border);border-radius:8px;background:var(--surface);
  cursor:pointer;transition:all .15s}
.login-link:hover{border-color:var(--accent);background:oklch(98% 0.005 165)}
.menu-btn{display:none;background:none;border:1px solid var(--border);border-radius:10px;width:40px;height:40px;cursor:pointer;color:var(--fg)}
.menu-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.mobile-menu{display:none;position:fixed;inset:66px 0 0;background:var(--bg);z-index:55;padding:24px;flex-direction:column;gap:6px}
.mobile-menu.open{display:flex}
.mobile-menu a{padding:14px 8px;font-size:17px;font-weight:500;border-bottom:1px solid var(--border)}
.mobile-menu .btn{margin-top:16px}

/* ============ 面包屑（全站统一）============ */
.breadcrumb-bar{padding:18px 0 12px;background:var(--surface)}
.breadcrumb-bar .wrap{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.breadcrumb-bar a,.breadcrumb-bar .bc-sep,.breadcrumb-bar .bc-current{font-size:14px;line-height:1.4}
.breadcrumb-bar a{color:var(--accent);font-weight:500;display:inline-flex;align-items:center;gap:6px;padding:5px 10px;border-radius:8px;transition:background .18s,color .18s;text-decoration:none}
.breadcrumb-bar a:hover{background:var(--accent-soft);color:var(--accent-ink)}
.breadcrumb-bar a.bc-home{font-weight:600}
.breadcrumb-bar a.bc-home svg{width:15px;height:15px;flex:none}
.breadcrumb-bar .bc-sep{color:oklch(65% 0.04 170);font-size:18px;font-weight:300;user-select:none;margin:0 2px}
.breadcrumb-bar .bc-current{color:oklch(25% 0.02 175);font-weight:700}

/* ============ 页脚（全站统一）============ */
footer{border-top:1px solid var(--border);background:var(--surface);padding:56px 0 40px}
footer .copyright{color:var(--muted);font-size:13px}
.foot{display:flex;justify-content:space-between;align-items:flex-start;gap:40px;margin-bottom:44px;flex-wrap:wrap}
.foot-brand .brand{margin-bottom:12px}
.foot-brand p{color:var(--muted);font-size:14.5px}
.foot-wechat{display:flex;align-items:center;gap:20px;flex-shrink:0}
.qr-wrap{width:80px;height:80px;border-radius:12px;display:grid;place-items:center;overflow:hidden}
.qr-wrap img,.qr-wrap svg{width:80px;height:80px;object-fit:cover}
.wx-info{display:flex;flex-direction:column;gap:8px}
.wx-label{font-size:13px;font-weight:600;color:var(--fg);letter-spacing:.02em}
.wx-id{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:500;color:var(--accent)}
.foot-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:26px;
  border-top:1px solid var(--border);color:var(--muted);font-size:13px;flex-wrap:wrap;gap:12px}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--font);
  font-size:15px;font-weight:550;letter-spacing:.02em;padding:13px 24px;border-radius:var(--r-btn);
  border:1px solid transparent;cursor:pointer;transition:transform .12s,box-shadow .2s,background .2s}
.btn:active{transform:translateY(1px);transition:transform .08s}
.btn:disabled{opacity:.55;cursor:not-allowed;pointer-events:none}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 16px oklch(38% 0.085 175 / .28)}
.btn-primary:hover{background:var(--accent-ink)}
.btn-ghost{background:var(--surface);color:var(--fg);border-color:var(--border)}
.btn-ghost:hover{border-color:oklch(80% 0.02 260)}

/* ============ 模态框（common.js 登录弹窗）============ */
.modal-overlay{
  position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:1000;
  display:none;align-items:center;justify-content:center;
  opacity:0;transition:opacity .2s ease}
.modal-overlay.active{display:flex;opacity:1}
.modal-box{
  background:var(--surface);border-radius:var(--r-card);border:1px solid var(--border);
  max-width:440px;width:90%;padding:24px;max-height:85vh;overflow-y:auto;box-shadow:var(--shadow-lg)}
.modal-box h3{font-size:1.25rem;font-weight:700;margin-bottom:16px;color:var(--fg)}
.modal-box input,.modal-box select,.modal-box textarea{
  width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:var(--r-btn);
  margin-bottom:12px;font-size:.95rem;background:var(--surface);color:var(--fg)}
.modal-box input:focus,.modal-box select:focus,.modal-box textarea:focus{
  outline:none;border-color:var(--accent);box-shadow:0 0 0 3px oklch(38% 0.085 175 / .12)}
.modal-box .btn-primary{width:100%}
.modal-box .btn-close{
  width:100%;margin-top:8px;background:none;border:none;color:var(--muted);font-size:.95rem;cursor:pointer}
.modal-box .btn-close:hover{color:var(--fg)}
.modal-box .btn-secondary{
  padding:10px 16px;border:1px solid var(--border);border-radius:var(--r-btn);
  background:var(--surface);color:var(--fg);font-size:.9rem;cursor:pointer;white-space:nowrap}
.modal-box .btn-secondary:hover{border-color:var(--accent);color:var(--accent-ink)}
.modal-box .btn-secondary:disabled{opacity:.55;cursor:not-allowed}

/* ============ VIP 访问守卫遮罩 ============ */
.vip-guard-overlay{
  position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:2000;
  display:none;align-items:center;justify-content:center}
.vip-guard-overlay.active{display:flex}
.vip-guard-card{
  background:var(--surface);border-radius:var(--r-card);border:1px solid var(--border);
  max-width:420px;width:90%;padding:36px 28px 28px;text-align:center;box-shadow:var(--shadow-lg);
  animation:vipCardPop .3s cubic-bezier(0.2,0,0,1)}
@keyframes vipCardPop{from{transform:scale(.9);opacity:0}to{transform:scale(1);opacity:1}}
.vip-guard-icon{
  width:72px;height:72px;margin:0 auto 20px;border-radius:50%;
  background:linear-gradient(135deg,#fef3c7,#fde68a);
  color:#d97706;display:grid;place-items:center}
.vip-guard-title{font-size:1.25rem;font-weight:700;color:var(--fg);margin-bottom:10px;letter-spacing:-.01em}
.vip-guard-desc{font-size:14.5px;color:var(--muted);line-height:1.7;margin-bottom:24px}
.vip-guard-btn{width:100%}
.vip-guard-close{
  display:block;margin:14px auto 0;background:none;border:none;color:var(--muted);
  font-size:.95rem;cursor:pointer;transition:color .15s}
.vip-guard-close:hover{color:var(--fg)}

/* 页面级 VIP 守卫：模糊页面内容 */
body.vip-guard-blur > .page-layout,
body.vip-guard-blur > main{filter:blur(6px);pointer-events:none;user-select:none;-webkit-user-select:none}

/* ============ 通用卡片 ============ */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--shadow)}

/* ============ 服务卡片（首页 & 服务页共用）============ */
.svc-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.svc{padding:28px;display:flex;flex-direction:column;transition:transform .2s cubic-bezier(0.2,0,0,1),box-shadow .2s,border-color .2s}
.svc:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:oklch(80% 0.04 170)}
.svc.featured{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent) inset,var(--shadow)}
.svc.featured:hover{border-color:var(--accent-ink);box-shadow:0 0 0 1px var(--accent-ink) inset,var(--shadow-lg)}
.svc-head{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.svc .ico{width:48px;height:48px;border-radius:12px;background:var(--accent);display:grid;place-items:center;color:#fff;flex:none}
.svc-head-txt{flex:1;min-width:0}
.svc h3{font-size:18px;margin-bottom:3px;color:var(--fg);letter-spacing:-.01em;line-height:1.2;font-weight:650}
.svc .tag{font-size:12px;font-weight:600;letter-spacing:.04em;color:var(--accent-ink)}
.svc .desc{font-size:14.5px;color:var(--muted);line-height:1.65;margin-bottom:16px;
  display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:4;overflow:hidden}
.svc-feats{list-style:none;display:flex;flex-direction:column;gap:9px;margin-bottom:18px}
.svc-feats li{display:flex;align-items:flex-start;gap:8px;font-size:13.5px;color:var(--fg)}
.svc-feats svg{color:var(--accent);flex:none;margin-top:3px}
.svc-foot{display:flex;justify-content:space-between;align-items:center;margin-top:auto;padding-top:16px;border-top:1px solid var(--border)}
.svc-price{font-size:13.5px;color:var(--muted)}
.svc-price b{font-size:18px;font-weight:700;color:#ff6b35;letter-spacing:-.01em}
.svc-link{display:inline-flex;align-items:center;gap:5px;font-size:14px;font-weight:600;color:var(--accent)}
.svc-link:hover{gap:8px;transition:gap .18s cubic-bezier(0.2,0,0,1)}
.svc-link:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
.svc .rec-badge{display:inline-flex;align-items:center;gap:5px;font-size:11.5px;font-weight:600;
  letter-spacing:.04em;color:#fff;background:var(--accent);padding:3px 10px;border-radius:999px}

/* ============ 通用 section 标题 ============ */
.section-head{max-width:640px;margin:0 auto clamp(36px,5vw,56px);text-align:center}
.section-head h2{font-size:clamp(26px,3.4vw,40px);margin:16px 0 12px;letter-spacing:-.02em;line-height:1.1;font-weight:700}
.section-head p{color:var(--muted);font-size:clamp(15px,1.5vw,17px);text-wrap:pretty}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:550;
  letter-spacing:.07em;color:var(--accent-ink);background:var(--accent-soft);padding:6px 14px;border-radius:999px}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--accent)}

/* ============ 进入视口渐显动画 ============ */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .4s cubic-bezier(0.2,0,0,1),transform .4s cubic-bezier(0.2,0,0,1)}
.reveal.in{opacity:1;transform:none}

/* ============ 无障碍 ============ */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}

/* ============ 响应式 ============ */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}
@media(max-width:900px){
  .nav-links{display:none}
  .vip-link span{display:none}
  .menu-btn{display:grid;place-items:center}
  .svc-grid{grid-template-columns:1fr}
  .foot{flex-direction:column;gap:32px}
  .foot-wechat{flex-direction:row}
}
@media(max-width:560px){
  .wrap{padding:0 18px}
  .svc-grid{grid-template-columns:1fr}
}