/* ============================================================
   common.css — 悟空搜款全站共用样式
============================================================ */

/* ============================================================
   Design Tokens
============================================================ */
:root{
  --color-primary:#7C3AED;
  --color-primary-hover:#6D28D9;
  --color-primary-light:#EDE9FE;
  --color-secondary:#8B5CF6;
  --color-accent:#059669;
  --color-accent-hover:#047857;
  --color-bg:#FAF5FF;
  --color-surface:#FFFFFF;
  --color-foreground:#0F172A;
  --color-muted:#F7F3FD;
  --color-border:#EFE7FC;
  --color-text:#334155;
  --color-text-secondary:#64748B;
  --color-text-muted:#94A3B8;
  --color-destructive:#DC2626;
  --color-destructive-light:#FEF2F2;
  --color-success:#059669;
  --color-success-light:#ECFDF5;
  --color-warning:#D97706;
  --color-warning-light:#FFFBEB;
  --color-wechat:#07C160;

  --font-heading:'Rubik',system-ui,-apple-system,sans-serif;
  --font-body:'Nunito Sans',system-ui,-apple-system,sans-serif;

  --radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:24px;--radius-full:9999px;

  --shadow-sm:0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg:0 8px 32px rgba(0,0,0,0.08);
  --shadow-xl:0 16px 48px rgba(0,0,0,0.1);
  --shadow-glow:0 8px 32px rgba(124,58,237,0.25);

  --z-sticky:200;--z-modal:400;

  --ease-out:cubic-bezier(0.16,1,0.3,1);
  --dur-fast:150ms;--dur-normal:250ms;--dur-slow:350ms;
}

/* ============================================================
   Reset & Base
============================================================ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-body);
  color:var(--color-text);
  background:var(--color-bg);
  line-height:1.65;overflow-x:hidden;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
::selection{background:var(--color-primary-light);color:var(--color-primary)}
:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px;border-radius:var(--radius-sm)}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:0.01ms!important;animation-iteration-count:1!important;transition-duration:0.01ms!important;scroll-behavior:auto!important}
}

/* ============================================================
   Mobile CTA Bar (首页专用)
============================================================ */
.mobile-cta{display:none;position:fixed;bottom:0;left:0;right:0;z-index:var(--z-sticky);background:rgba(255,255,255,0.96);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-top:1px solid var(--color-border);padding:10px 16px;padding-bottom:max(10px,env(safe-area-inset-bottom))}
.mobile-cta-inner{display:flex;gap:10px}
.mobile-cta-dl{flex:1;display:flex;align-items:center;justify-content:center;gap:6px;padding:12px;border-radius:var(--radius-full);background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));color:#fff;font-weight:700;font-size:15px;border:none;cursor:pointer;min-height:48px;transition:transform var(--dur-fast) var(--ease-out),box-shadow var(--dur-fast) var(--ease-out)}
.mobile-cta-dl:active{transform:scale(0.97)}
.mobile-cta-wx{display:flex;align-items:center;justify-content:center;gap:4px;padding:12px 18px;border-radius:var(--radius-full);background:var(--color-wechat);color:#fff;font-weight:700;font-size:14px;border:none;cursor:pointer;min-height:48px;white-space:nowrap;transition:transform var(--dur-fast) var(--ease-out)}
.mobile-cta-wx:active{transform:scale(0.97)}
@media(max-width:768px){.mobile-cta{display:block}body{padding-bottom:80px}}

/* ============================================================
   Navbar
============================================================ */
.navbar{position:fixed;top:0;left:0;right:0;z-index:var(--z-sticky);background:rgba(255,255,255,0.88);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid transparent;transition:border-color var(--dur-normal) var(--ease-out),box-shadow var(--dur-normal) var(--ease-out)}
.navbar.is-scrolled{border-bottom-color:var(--color-border);box-shadow:var(--shadow-sm)}
.nav-inner{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:64px}
.nav-brand{display:flex;align-items:center;gap:10px}
.nav-logo{width:36px;height:36px;border-radius:var(--radius-sm);background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));display:flex;align-items:center;justify-content:center;color:#fff;font-family:var(--font-heading);font-size:18px;font-weight:900}
.nav-logo-img{width:36px;height:36px;border-radius:var(--radius-sm);object-fit:contain}
.nav-brand-text{font-family:var(--font-heading);font-size:19px;font-weight:800;color:var(--color-foreground)}
.nav-links{display:flex;align-items:center;gap:24px}
.nav-link{font-size:14px;font-weight:500;color:var(--color-text-secondary);cursor:pointer;transition:color var(--dur-fast) var(--ease-out)}
.nav-link:hover{color:var(--color-primary)}
.nav-btn{padding:8px 18px;border-radius:var(--radius-full);font-size:14px;font-weight:600;border:none;cursor:pointer;min-height:44px;transition:transform var(--dur-fast) var(--ease-out),box-shadow var(--dur-fast) var(--ease-out)}
.nav-btn:active{transform:scale(0.97)}
.nav-btn-dl{background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));color:#fff}
.nav-btn-dl:hover{transform:translateY(-1px);box-shadow:var(--shadow-glow)}
.nav-btn-wx{background:var(--color-wechat);color:#fff}
.nav-btn-wx:hover{transform:translateY(-1px)}

/* ============================================================
   Hero (首页)
============================================================ */
.hero{padding:150px 24px 90px;text-align:center;background:linear-gradient(180deg,var(--color-muted) 0%,var(--color-primary-light) 30%,var(--color-bg) 100%);position:relative;overflow:hidden}
.hero-orb{position:absolute;top:-280px;left:50%;transform:translateX(-50%);width:900px;height:900px;background:radial-gradient(circle,rgba(124,58,237,0.06) 0%,transparent 65%);pointer-events:none}
.hero-grid{position:absolute;inset:0;opacity:0.03;pointer-events:none;background-image:linear-gradient(var(--color-primary) 1px,transparent 1px),linear-gradient(90deg,var(--color-primary) 1px,transparent 1px);background-size:60px 60px}
.hero-inner{position:relative;z-index:1}
.badge{display:inline-flex;align-items:center;gap:7px;background:rgba(124,58,237,0.08);color:var(--color-primary);font-size:13px;font-weight:700;padding:6px 16px;border-radius:var(--radius-full);margin-bottom:20px}
.badge-dot{width:7px;height:7px;border-radius:50%;background:var(--color-success)}
.hero h1{font-family:var(--font-heading);font-size:clamp(36px,5.5vw,58px);font-weight:900;letter-spacing:-1.5px;line-height:1.15;background:linear-gradient(135deg,var(--color-foreground) 0%,var(--color-primary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:20px}
.hero h1 .grad{background:linear-gradient(135deg,var(--color-primary),#C084FC);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{font-size:17px;color:var(--color-text-secondary);max-width:620px;margin:0 auto 14px;line-height:1.7}
.hero-alert{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--color-destructive);background:var(--color-destructive-light);padding:6px 16px;border-radius:var(--radius-full);margin-bottom:34px}
.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:var(--radius-full);font-family:var(--font-heading);font-size:16px;font-weight:700;cursor:pointer;border:none;min-height:48px;transition:transform var(--dur-fast) var(--ease-out),box-shadow var(--dur-fast) var(--ease-out),background var(--dur-fast) var(--ease-out)}
.btn:active{transform:scale(0.97)}
.btn-primary{background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));color:#fff;box-shadow:0 6px 24px rgba(124,58,237,0.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 36px rgba(124,58,237,0.4)}
.btn-outline{background:var(--color-surface);color:var(--color-primary);border:2px solid var(--color-border)}
.btn-outline:hover{border-color:var(--color-primary);background:var(--color-primary-light)}
.btn-wechat{background:var(--color-surface);color:var(--color-wechat);border:2px solid var(--color-wechat)}
.btn-wechat:hover{background:var(--color-success-light)}
.btn-dl-dark{background:#fff;color:var(--color-foreground);box-shadow:0 6px 24px rgba(0,0,0,0.25)}
.btn-dl-dark:hover{transform:translateY(-2px);box-shadow:0 10px 36px rgba(0,0,0,0.35)}
.btn-wx-dark{background:var(--color-wechat);color:#fff}
.btn-wx-dark:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(7,193,96,0.35)}

/* Stats */
.stats-bar{display:flex;gap:48px;justify-content:center;flex-wrap:wrap;margin-top:52px;padding:24px 40px;background:var(--color-surface);border-radius:var(--radius-lg);border:1px solid var(--color-border);max-width:720px;margin-left:auto;margin-right:auto;box-shadow:var(--shadow-sm)}
.stat-item{text-align:center}
.stat-value{font-family:var(--font-heading);font-size:32px;font-weight:900;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.stat-label{font-size:13px;color:var(--color-text-muted);margin-top:2px;font-weight:500}

/* ============================================================
   Sections (首页)
============================================================ */
.section{padding:80px 24px;max-width:1200px;margin:0 auto}
.section-hd{margin-bottom:48px}
.section-eye{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:800;letter-spacing:2px;color:var(--color-primary);text-transform:uppercase;margin-bottom:10px}
.section-eye::before{content:'';width:20px;height:2px;background:var(--color-primary);border-radius:1px}
.section-title{font-family:var(--font-heading);font-size:clamp(28px,4vw,38px);font-weight:900;letter-spacing:-0.5px;line-height:1.2;color:var(--color-foreground);margin-bottom:12px}
.section-desc{font-size:16px;color:var(--color-text-secondary);max-width:600px;line-height:1.7}

/* ============================================================
   Pain Cards (首页)
============================================================ */
.pain-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
.pain-card{background:var(--color-surface);border-radius:var(--radius-lg);padding:28px 24px;border:1px solid var(--color-border);transition:transform var(--dur-normal) var(--ease-out),box-shadow var(--dur-normal) var(--ease-out);position:relative;overflow:hidden;cursor:default}
.pain-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.pain-card::before{content:'';position:absolute;top:0;left:0;width:100%;height:3px}
.pain-card:nth-child(1)::before{background:var(--color-destructive)}
.pain-card:nth-child(2)::before{background:var(--color-warning)}
.pain-card:nth-child(3)::before{background:var(--color-primary)}
.pain-card:nth-child(4)::before{background:var(--color-destructive)}
.pain-icon{width:44px;height:44px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.pain-icon.red{background:var(--color-destructive-light)}
.pain-icon.amber{background:var(--color-warning-light)}
.pain-icon.purple{background:var(--color-primary-light)}
.pain-card h3{font-family:var(--font-heading);font-size:16px;font-weight:800;margin-bottom:6px;color:var(--color-foreground)}
.pain-meta{font-size:12px;font-weight:700;color:var(--color-destructive);margin-bottom:6px}
.pain-card p{font-size:14px;color:var(--color-text-secondary);line-height:1.65}

/* ============================================================
   Features (首页)
============================================================ */
.feat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px}
.feat-card{background:var(--color-surface);border-radius:var(--radius-lg);padding:28px;border:1px solid var(--color-border);display:flex;gap:16px;align-items:flex-start;transition:transform var(--dur-normal) var(--ease-out),box-shadow var(--dur-normal) var(--ease-out)}
.feat-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}
.feat-icon{flex-shrink:0;width:48px;height:48px;border-radius:var(--radius-md);background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));display:flex;align-items:center;justify-content:center}
.feat-icon svg{width:24px;height:24px;color:#fff}
.feat-body{flex:1}
.feat-body h4{font-family:var(--font-heading);font-size:16px;font-weight:800;margin-bottom:4px;color:var(--color-foreground)}
.feat-body p{font-size:14px;color:var(--color-text-secondary);line-height:1.6}

/* ============================================================
   Comparison Table (首页)
============================================================ */
.cmp-wrap{background:var(--color-surface);border-radius:var(--radius-xl);border:1px solid var(--color-border);overflow:hidden;box-shadow:var(--shadow-sm)}
.cmp-table{width:100%;border-collapse:collapse}
.cmp-table thead th{padding:18px 24px;font-family:var(--font-heading);font-size:15px;font-weight:800;text-align:left}
.cmp-table thead th.bad{background:#F8FAFC;color:var(--color-text-muted)}
.cmp-table thead th.good{background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));color:#fff}
.cmp-table tbody td{padding:14px 24px;font-size:14px;border-bottom:1px solid var(--color-border);color:var(--color-text-secondary)}
.cmp-table tbody tr:last-child td{border-bottom:none}
.cmp-table .g{color:var(--color-success);font-weight:700}
.cmp-table .r{color:var(--color-destructive);font-weight:700}
.cmp-table .big{font-size:18px}

/* ============================================================
   Steps (首页)
============================================================ */
.steps-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}
.step-card{background:var(--color-surface);border-radius:var(--radius-lg);padding:36px 28px;text-align:center;border:1px solid var(--color-border);transition:transform var(--dur-normal) var(--ease-out),box-shadow var(--dur-normal) var(--ease-out);position:relative;cursor:default}
.step-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.step-ring{width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));display:flex;align-items:center;justify-content:center;margin:0 auto 18px;box-shadow:0 4px 16px rgba(124,58,237,0.2)}
.step-ring span{font-family:var(--font-heading);font-size:22px;font-weight:900;color:#fff}
.step-card h4{font-family:var(--font-heading);font-size:17px;font-weight:800;margin-bottom:6px;color:var(--color-foreground)}
.step-card p{font-size:14px;color:var(--color-text-secondary);line-height:1.6}
.step-body{flex:1}

/* ============================================================
   Platforms (全站)
============================================================ */
.plat-group{margin-bottom:28px}
.plat-ttl{font-size:13px;font-weight:700;color:var(--color-text-muted);letter-spacing:1px;text-transform:uppercase;margin-bottom:12px}
.plat-tags{display:flex;flex-wrap:wrap;gap:10px}
.plat-tag{display:inline-flex;align-items:center;gap:6px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-full);padding:9px 18px;font-size:14px;font-weight:600;color:var(--color-text);transition:all var(--dur-fast) var(--ease-out);cursor:default}
.plat-tag:hover{border-color:var(--color-primary);background:var(--color-primary-light);transform:translateY(-1px)}

/* ============================================================
   WeChat Card (首页)
============================================================ */
.wx-card{background:linear-gradient(135deg,var(--color-success-light),#D1FAE5);border-radius:var(--radius-xl);padding:48px;text-align:center;border:2px dashed var(--color-success);position:relative;overflow:hidden}
.wx-card::after{content:'';position:absolute;top:-80px;right:-80px;width:240px;height:240px;border-radius:50%;background:rgba(5,150,105,0.04);pointer-events:none}
.wx-badge{display:inline-flex;align-items:center;gap:6px;background:var(--color-success);color:#fff;font-size:13px;font-weight:700;padding:6px 16px;border-radius:var(--radius-full);margin-bottom:16px;position:relative;z-index:1}
.wx-card h3{font-family:var(--font-heading);font-size:24px;font-weight:900;margin-bottom:8px;position:relative;z-index:1;color:var(--color-foreground)}
.wx-sub{font-size:15px;color:var(--color-text-secondary);margin-bottom:24px;position:relative;z-index:1}
.qr-wrap{display:inline-block;width:200px;height:200px;background:var(--color-surface);border-radius:var(--radius-lg);padding:8px;position:relative;z-index:1;box-shadow:var(--shadow-md)}
.qr-wrap img{width:100%;height:100%;border-radius:var(--radius-sm);object-fit:contain}
.wx-hint{font-size:13px;font-weight:600;color:var(--color-success);margin-top:10px;position:relative;z-index:1}

/* ============================================================
   Download CTA (首页)
============================================================ */
.dl-cta{background:linear-gradient(135deg,#0F172A,#1E1B4B);border-radius:var(--radius-xl);padding:72px 48px;text-align:center;position:relative;overflow:hidden}
.dl-cta::before{content:'';position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle at 25% 40%,rgba(124,58,237,0.12) 0%,transparent 50%),radial-gradient(circle at 75% 60%,rgba(139,92,246,0.08) 0%,transparent 50%);pointer-events:none}
.dl-cta .section-eye{color:rgba(255,255,255,0.5)}
.dl-cta .section-eye::before{background:rgba(255,255,255,0.4)}
.dl-cta .section-title{color:#fff;position:relative;z-index:1}
.dl-cta .section-desc{color:rgba(255,255,255,0.65);margin-left:auto;margin-right:auto;position:relative;z-index:1}
.dl-btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;position:relative;z-index:1;margin-top:8px}
.dl-meta{margin-top:20px;font-size:13px;color:rgba(255,255,255,0.35);position:relative;z-index:1}

/* ============================================================
   FAQ (首页)
============================================================ */
.faq-list{max-width:800px}
.faq-item{background:var(--color-surface);border-radius:var(--radius-md);border:1px solid var(--color-border);margin-bottom:10px;cursor:pointer;transition:border-color var(--dur-fast) var(--ease-out)}
.faq-item:hover{border-color:var(--color-primary)}
.faq-item.open{border-color:var(--color-primary);box-shadow:var(--shadow-sm)}
.faq-q{padding:20px 24px;display:flex;justify-content:space-between;align-items:center;font-family:var(--font-heading);font-size:15px;font-weight:700;color:var(--color-foreground);user-select:none}
.faq-chev{transition:transform var(--dur-normal) var(--ease-out);color:var(--color-text-muted);flex-shrink:0}
.faq-item.open .faq-chev{transform:rotate(180deg);color:var(--color-primary)}
.faq-a{max-height:0;overflow:hidden;transition:max-height var(--dur-slow) var(--ease-out)}
.faq-item.open .faq-a{max-height:400px}
.faq-a-inner{padding:0 24px 20px;font-size:14px;color:var(--color-text-secondary);line-height:1.7}

/* ============================================================
   Contact (首页)
============================================================ */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.contact-card{background:var(--color-surface);border-radius:var(--radius-lg);padding:28px;text-align:center;border:1px solid var(--color-border);transition:transform var(--dur-normal) var(--ease-out),box-shadow var(--dur-normal) var(--ease-out);cursor:default}
.contact-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.contact-ico{width:48px;height:48px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;margin:0 auto 12px}
.contact-card h4{font-family:var(--font-heading);font-size:15px;font-weight:800;margin-bottom:4px;color:var(--color-foreground)}
.contact-card p{font-size:13px;color:var(--color-text-secondary);word-break:break-all}

/* ============================================================
   Footer (全站)
============================================================ */
.site-ft{text-align:center;padding:28px 24px;color:var(--color-text-muted);font-size:13px;border-top:1px solid var(--color-border)}
.site-ft a{color:var(--color-primary);font-weight:600}
.site-ft a:hover{text-decoration:underline}

/* ============================================================
   Modal (首页)
============================================================ */
.modal-overlay{display:none;position:fixed;inset:0;z-index:var(--z-modal);background:rgba(15,23,42,0.5);backdrop-filter:blur(4px);align-items:center;justify-content:center}
.modal-overlay.show{display:flex}
.modal-box{background:var(--color-surface);border-radius:var(--radius-xl);padding:44px 32px 32px;text-align:center;max-width:360px;width:92%;position:relative;animation:modalIn var(--dur-slow) var(--ease-out);box-shadow:var(--shadow-xl)}
@keyframes modalIn{from{opacity:0;transform:scale(0.92) translateY(16px)}to{opacity:1;transform:scale(1) translateY(0)}}
.modal-x{position:absolute;top:12px;right:14px;width:32px;height:32px;border-radius:50%;background:var(--color-muted);border:none;cursor:pointer;color:var(--color-text-secondary);display:flex;align-items:center;justify-content:center;transition:background var(--dur-fast) var(--ease-out)}
.modal-x:hover{background:#E2E8F0;color:var(--color-foreground)}
.modal-box h3{font-family:var(--font-heading);font-size:20px;font-weight:900;margin-bottom:6px;color:var(--color-foreground)}
.modal-sub{font-size:14px;color:var(--color-text-secondary);margin-bottom:20px}
.modal-qr{width:180px;height:180px;margin:0 auto 12px;background:var(--color-muted);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;padding:6px}
.modal-qr img{width:100%;height:100%;border-radius:6px;object-fit:contain}
.modal-hint{font-size:13px;font-weight:600;color:var(--color-success)}

/* ============================================================
   Scroll Reveal (首页)
============================================================ */
.reveal{opacity:0;transform:translateY(28px);transition:opacity 0.6s var(--ease-out),transform 0.6s var(--ease-out)}
.reveal.on{opacity:1;transform:translateY(0)}

/* ============================================================
   Responsive (全站共用)
============================================================ */
@media(max-width:1024px){
  .nav-links{gap:16px}.nav-link{font-size:13px}
  .hero{padding:130px 24px 70px}.hero h1{font-size:40px}
  .stats-bar{gap:32px;padding:20px 28px}.stat-value{font-size:28px}
  .section{padding:60px 24px}.dl-cta{padding:56px 32px}.wx-card{padding:40px 28px}
  .steps-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
}
@media(max-width:768px){
  .nav-inner{height:56px;padding:0 16px}.nav-brand-text{font-size:17px}.nav-logo{width:30px;height:30px;font-size:15px}.nav-logo-img{width:30px;height:30px}
  .nav-link{display:none}.nav-btn{padding:6px 14px;font-size:12px;min-height:40px}
  .nav-btn-wx{font-size:11px;padding:6px 12px}
  .hero{padding:100px 16px 52px}.hero h1{font-size:30px;letter-spacing:-1px}
  .hero-desc{font-size:15px}.hero-alert{font-size:13px;margin-bottom:24px}
  .hero-actions{flex-direction:column;align-items:center}
  .hero-actions .btn{width:100%;max-width:320px;justify-content:center}
  .stats-bar{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;padding:20px 24px}.stat-value{font-size:26px}
  .section{padding:48px 16px}.section-hd{margin-bottom:32px}.section-title{font-size:24px}.section-desc{font-size:14px}
  .pain-grid{grid-template-columns:1fr;gap:12px}.pain-card{padding:22px 18px}
  .feat-grid{grid-template-columns:1fr;gap:12px}.feat-card{padding:22px 18px;gap:14px}
  .cmp-table thead th,.cmp-table tbody td{padding:12px 14px;font-size:13px}
  .steps-grid{grid-template-columns:1fr;gap:12px}
  .step-card{padding:24px 20px;text-align:left;display:flex;gap:16px;align-items:flex-start}
  .step-ring{width:44px;height:44px;margin:0;flex-shrink:0}.step-ring span{font-size:18px}.step-card h4{font-size:15px}
  .wx-card{padding:28px 16px;border-radius:var(--radius-lg)}.wx-card h3{font-size:20px}.qr-wrap{width:160px;height:160px}
  .dl-cta{padding:44px 16px;border-radius:var(--radius-lg)}.dl-cta .section-title{font-size:22px}
  .dl-btns{flex-direction:column;align-items:center}.dl-btns .btn{width:100%;max-width:300px;justify-content:center}
  .faq-q{padding:18px 18px;font-size:14px}.faq-a-inner{padding:0 18px 18px;font-size:13px}
  .contact-grid{grid-template-columns:repeat(2,1fr);gap:10px}.contact-card{padding:20px 12px}
  .modal-box{max-width:300px;padding:32px 20px 24px}.modal-qr{width:150px;height:150px}
}
@media(max-width:400px){
  .hero{padding:88px 12px 40px}.hero h1{font-size:26px}
  .section{padding:36px 12px}.section-title{font-size:22px}
  .contact-grid{grid-template-columns:1fr}
  .step-card{flex-direction:column;text-align:center;align-items:center}.step-ring{margin:0 auto 12px}
  .cmp-table thead th,.cmp-table tbody td{padding:10px 8px;font-size:11px}
  .qr-wrap{width:140px;height:140px}.modal-qr{width:130px;height:130px}.stats-bar{gap:12px;padding:16px}
}

/* ============================================================
   Sub-page overrides (faq.html / tutorial.html)
   .page-sub class on <body> activates these
============================================================ */

/* Hero — 子页面 */
.page-sub .hero{padding:36px 24px 20px;background:linear-gradient(180deg,var(--color-muted) 0%,var(--color-primary-light) 30%,var(--color-bg) 100%);position:static;overflow:visible}
.page-sub .hero h1{font-size:clamp(28px,4vw,42px);letter-spacing:-0.5px;background:none;-webkit-text-fill-color:var(--color-foreground);margin-bottom:12px}
.page-sub .hero-desc{font-size:16px;max-width:640px;margin:0 auto}

/* Section — 子页面 */
.page-sub .section{padding:48px 24px;max-width:900px}
.page-sub .section-title{font-size:clamp(22px,3vw,30px);margin-bottom:24px;padding-bottom:12px;border-bottom:2px solid var(--color-border)}

/* Breadcrumb — 子页面 */
.breadcrumb{max-width:1200px;margin:80px auto 0;padding:24px 24px 0;display:flex;gap:8px;align-items:center;font-size:13px;color:var(--color-text-muted)}
.breadcrumb a{color:var(--color-primary);font-weight:600}
.breadcrumb a:hover{text-decoration:underline}
.breadcrumb .sep{color:var(--color-border)}

/* FAQ 子页面 */
.page-sub .faq-list{display:flex;flex-direction:column;gap:12px;max-width:none}
.page-sub .faq-item{overflow:hidden;cursor:default;margin-bottom:0}
.page-sub .faq-q{padding:20px 24px;font-family:var(--font-heading);font-size:16px;font-weight:700;color:var(--color-foreground);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px;transition:color var(--dur-fast) var(--ease-out);user-select:none}
.page-sub .faq-q:hover{color:var(--color-primary)}
.page-sub .faq-q .icon{flex-shrink:0;width:20px;height:20px;color:var(--color-text-muted);transition:color var(--dur-fast) var(--ease-out)}
.page-sub .faq-q:hover .icon{color:var(--color-primary)}
.page-sub .faq-a{max-height:none;overflow:visible;padding:0 24px 20px;font-size:15px;color:var(--color-text-secondary);line-height:1.75}
.page-sub .faq-a a{color:var(--color-primary);font-weight:600}
.page-sub .faq-a a:hover{text-decoration:underline}
.page-sub .faq-a ul,.page-sub .faq-a ol{padding-left:20px;margin:8px 0}
.page-sub .faq-a li{margin-bottom:4px}
.page-sub .faq-a code{background:var(--color-muted);padding:2px 6px;border-radius:4px;font-size:13px;color:var(--color-primary)}

/* CTA Banner — 子页面 */
.page-sub .cta-banner{max-width:900px;margin:0 auto 48px;padding:0 24px}
.page-sub .cta-inner{background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));border-radius:var(--radius-lg);padding:32px 40px;display:flex;align-items:center;justify-content:space-between;gap:20px;color:#fff;flex-wrap:wrap}
.page-sub .cta-text h3{font-family:var(--font-heading);font-size:20px;font-weight:800;margin-bottom:4px}
.page-sub .cta-text p{font-size:14px;opacity:0.85}
.page-sub .cta-btn{display:inline-flex;align-items:center;gap:6px;padding:12px 28px;border-radius:var(--radius-full);background:#fff;color:var(--color-primary);font-weight:700;font-size:15px;white-space:nowrap;transition:transform var(--dur-fast) var(--ease-out),box-shadow var(--dur-fast) var(--ease-out)}
.page-sub .cta-btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,0.2)}

/* Tutorial 深色 CTA */
.page-tutorial .cta-inner{background:linear-gradient(135deg,#0F172A,#1E1B4B)}
.page-tutorial .cta-text p{opacity:0.65}
.page-tutorial .cta-btn{color:var(--color-foreground)}
.page-tutorial .cta-btn:hover{box-shadow:0 8px 24px rgba(0,0,0,0.3)}

/* Tutorial Step Cards */
.step{display:flex;gap:24px;margin-bottom:32px;padding:28px;background:var(--color-surface);border-radius:var(--radius-lg);border:1px solid var(--color-border);transition:box-shadow var(--dur-normal) var(--ease-out)}
.step:hover{box-shadow:var(--shadow-md)}
.step-num{flex-shrink:0;width:52px;height:52px;border-radius:50%;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));display:flex;align-items:center;justify-content:center;color:#fff;font-family:var(--font-heading);font-size:22px;font-weight:900;box-shadow:0 4px 16px rgba(124,58,237,0.2)}
.step-body h3{font-family:var(--font-heading);font-size:18px;font-weight:800;color:var(--color-foreground);margin-bottom:8px}
.step-body p{font-size:15px;color:var(--color-text-secondary);line-height:1.75;margin-bottom:8px}
.step-body ul,.step-body ol{padding-left:20px;margin:8px 0}
.step-body li{font-size:14px;color:var(--color-text-secondary);margin-bottom:6px;line-height:1.65}
.step-body code{background:var(--color-muted);padding:2px 8px;border-radius:4px;font-size:13px;color:var(--color-primary);font-weight:600}
.step-body .note{display:inline-flex;align-items:center;gap:6px;margin-top:8px;padding:8px 14px;background:var(--color-primary-light);border-radius:var(--radius-sm);font-size:13px;font-weight:600;color:var(--color-primary)}
.step-body .note svg{flex-shrink:0}

/* Tutorial TOC */
.toc{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:24px 28px;margin-bottom:32px}
.toc-title{font-family:var(--font-heading);font-size:15px;font-weight:800;color:var(--color-foreground);margin-bottom:12px}
.toc ol{padding-left:20px}
.toc li{margin-bottom:6px;font-size:14px}
.toc a{color:var(--color-primary);font-weight:600;transition:opacity var(--dur-fast) var(--ease-out)}
.toc a:hover{opacity:0.7}

/* Tutorial Section Sub */
.section-sub{font-size:15px;color:var(--color-text-muted);margin-bottom:28px}

/* Tutorial Platform Section */
.plat-section{margin-bottom:36px}
.plat-section h3{font-family:var(--font-heading);font-size:17px;font-weight:800;color:var(--color-foreground);margin-bottom:6px}
.plat-section > p{font-size:14px;color:var(--color-text-secondary);margin-bottom:12px}
.plat-tag .dot{width:7px;height:7px;border-radius:50%;background:var(--color-primary)}

/* Tutorial Tip Box */
.tip-box{background:var(--color-success-light);border:1px solid var(--color-success);border-left:4px solid var(--color-success);border-radius:var(--radius-md);padding:18px 24px;margin-bottom:24px}
.tip-box h4{font-family:var(--font-heading);font-size:15px;font-weight:800;color:var(--color-success);margin-bottom:4px}
.tip-box p{font-size:14px;color:var(--color-text-secondary);line-height:1.65}

/* ============================================================
   Sub-page Responsive
============================================================ */
@media(max-width:768px){
  .breadcrumb{padding:80px 16px 0}
  .page-sub .section{padding:36px 16px}.page-sub .section-title{font-size:22px}
  .page-sub .faq-q{padding:16px 18px;font-size:15px}.page-sub .faq-a{padding:0 18px 16px;font-size:14px}
  .page-sub .cta-inner{flex-direction:column;text-align:center;padding:24px 20px}
  .step{flex-direction:column;gap:16px;padding:20px 18px}.step-num{width:40px;height:40px;font-size:18px}
  .step-body h3{font-size:16px}
  .toc{padding:18px 16px}
}