/* ═══════════════════════════════════════════════════════════
   Havos 官网 v3 · 共享样式（theme.css）
   由 index.html 的同源设计系统抽出 —— 首页内联、子页引用本文件
   改设计令牌请两地同步：index.html <style> 与本文件
   ═══════════════════════════════════════════════════════════ */

/* ═══════════════════════════════════════════════════════════
   Havos 官网 v3 · 2026-10-16 全面改版
   设计语言：暖白底 + 紫粉渐变 + 柔和卡片 —— 温馨、时尚、不失科技感
   与 App 2.0 的浅色界面同一血缘，官网即产品的第一眼
   ═══════════════════════════════════════════════════════════ */
:root{
  --bg:#FBF8F3; --bg-2:#F4EFE7; --card:#FFFFFF;
  --ink:#251F38; --ink-2:#6C6580; --ink-3:#A39CB6;
  --bd:rgba(48,32,90,.09); --bd-2:rgba(48,32,90,.15); --bd-3:rgba(48,32,90,.24);
  --violet:#7C3AED; --violet-2:#8B5CF6; --lilac:#A78BFA; --lav:#EFE9FC;
  --peach:#FB923C; --pink:#EC4899; --rose-lav:#FDECF4;
  --teal:#0EA5A4; --green:#0FA968; --amber:#F59E0B; --red:#E5484D;
  --grad:linear-gradient(115deg,#7C3AED 0%,#B855F7 52%,#EC4899 100%);
  --grad-soft:linear-gradient(115deg,#8B5CF6,#EC4899);
  --sh-sm:0 2px 10px rgba(58,36,110,.06);
  --sh:0 14px 40px rgba(58,36,110,.09);
  --sh-lg:0 30px 80px rgba(58,36,110,.16);
  --ff-display:'Outfit',-apple-system,BlinkMacSystemFont,'PingFang SC','HarmonyOS Sans SC','Microsoft YaHei',sans-serif;
  --ff-body:'Noto Sans SC','Outfit',-apple-system,BlinkMacSystemFont,'PingFang SC','HarmonyOS Sans SC','Microsoft YaHei',sans-serif;
  --ff-mono:'JetBrains Mono','SF Mono',Menlo,Consolas,monospace;
  --tl-red:#FF5F57; --tl-yellow:#FEBC2E; --tl-green:#28C840;
  --sec-py:96px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--ff-body);background:var(--bg);color:var(--ink);line-height:1.65;overflow-x:hidden;-webkit-font-smoothing:antialiased}
h1,h2,h3,.sec-title,.hero h1{font-family:var(--ff-display)}
::selection{background:rgba(124,58,237,.22);color:var(--ink)}
a{color:inherit;text-decoration:none}
img{display:block}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input{font-family:inherit}
.container{max-width:1160px;margin:0 auto;padding:0 24px}

/* ---------- 通用 Section ---------- */
.section{padding:var(--sec-py) 0;position:relative}
.sec-white{background:var(--card);border-top:1px solid var(--bd);border-bottom:1px solid var(--bd)}
.sec-tint{background:linear-gradient(180deg,var(--bg) 0%,#F6EFE6 50%,var(--bg) 100%)}
.sec-label{display:inline-flex;align-items:center;gap:9px;font-size:11.5px;font-weight:700;letter-spacing:2.2px;color:var(--violet);text-transform:uppercase;margin-bottom:18px;font-family:var(--ff-mono)}
.sec-label::before{content:'';width:22px;height:2px;background:var(--grad);border-radius:2px}
.sec-title{font-size:clamp(29px,4.4vw,46px);font-weight:800;letter-spacing:-1.2px;line-height:1.2;margin-bottom:18px}
.sec-title .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.sec-desc{font-size:16px;color:var(--ink-2);max-width:660px;line-height:1.8}
.sec-head{margin-bottom:52px}
.sec-head.center{text-align:center}
.sec-head.center .sec-label{justify-content:center}
.sec-head.center .sec-desc{margin:0 auto}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:14px;font-weight:700;border-radius:12px;transition:all .22s cubic-bezier(.4,0,.2,1);white-space:nowrap}
.btn-primary{background:var(--grad-soft);color:#fff;padding:11px 24px;box-shadow:0 6px 22px rgba(139,92,246,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(139,92,246,.45)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--ink);padding:10px 22px;border:1.5px solid var(--bd-2)}
.btn-ghost:hover{border-color:var(--violet-2);color:var(--violet);background:var(--lav)}
.btn-lg{padding:15px 34px;font-size:15px;border-radius:14px}

/* ---------- Nav ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;transition:all .3s ease;border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(251,248,243,.86);backdrop-filter:blur(20px) saturate(1.5);-webkit-backdrop-filter:blur(20px) saturate(1.5);border-bottom-color:var(--bd)}
.nav-inner{max-width:1160px;margin:0 auto;padding:0 24px;height:66px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:800;letter-spacing:.2px}
.logo-mark{width:32px;height:32px;border-radius:9px;overflow:hidden;display:flex;align-items:center;justify-content:center;box-shadow:0 3px 12px rgba(124,58,237,.28)}
.logo-mark img{width:100%;height:100%;object-fit:cover}
.nav-links{display:flex;gap:4px;align-items:center}
.nav-link{font-size:14px;color:var(--ink-2);padding:8px 13px;border-radius:9px;font-weight:500;position:relative;transition:color .2s}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{content:'';position:absolute;left:13px;right:13px;bottom:3px;height:2.5px;border-radius:2px;background:var(--grad)}
.nav-cta{display:flex;align-items:center;gap:10px}
.nav-cta .btn-ghost{padding:8px 18px}
.nav .btn-primary{padding:9px 20px}

/* nav 登录态（JS 依赖这些 ID/类，勿改） */
.nav-user{position:relative}
.nav-user-info{display:flex;align-items:center;gap:8px;padding:6px 12px;background:#fff;border:1px solid var(--bd-2);border-radius:11px;cursor:pointer;transition:all .2s}
.nav-user-info:hover{border-color:var(--lilac);background:var(--lav)}
.nav-user-phone{font-size:13px;font-weight:700}
.nav-user-points{font-size:11px;color:var(--violet);background:var(--lav);padding:2px 8px;border-radius:20px;font-weight:700}
.nav-user-arrow{font-size:9px;color:var(--ink-3);transition:transform .2s}
.nav-user-info.open .nav-user-arrow{transform:rotate(180deg)}
.user-menu{position:absolute;top:calc(100% + 10px);right:0;width:230px;background:#fff;border:1px solid var(--bd-2);border-radius:15px;padding:8px;box-shadow:var(--sh-lg);opacity:0;visibility:hidden;transform:translateY(-8px);transition:all .22s}
.user-menu.show{opacity:1;visibility:visible;transform:translateY(0)}
.user-menu-label{font-size:11px;color:var(--ink-3);padding:8px 12px 4px;font-weight:700;letter-spacing:.5px}
.user-menu-item{display:flex;justify-content:space-between;align-items:center;padding:9px 12px;font-size:13px;color:var(--ink-2);border-radius:9px;cursor:pointer;transition:all .15s}
.user-menu-item:hover{background:var(--lav);color:var(--ink)}
.user-menu-points{color:var(--violet);font-weight:800}
.user-menu-divider{height:1px;background:var(--bd);margin:6px 4px}

/* ---------- 学习中心 Learn ---------- */
.learn-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.learn-card{background:#fff;border:1px solid var(--bd);border-radius:22px;padding:28px 26px;position:relative;overflow:hidden;box-shadow:var(--sh-sm);transition:all .3s cubic-bezier(.4,0,.2,1);display:flex;flex-direction:column}
.learn-card:hover{transform:translateY(-5px);box-shadow:var(--sh);border-color:rgba(167,139,250,.5)}
.learn-num{font-family:var(--ff-display);font-size:44px;font-weight:800;line-height:1;background:var(--lc,var(--grad));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:16px}
.learn-card h4{font-size:17.5px;font-weight:800;margin-bottom:6px;display:flex;align-items:center;gap:9px;flex-wrap:wrap}
.learn-time{font-size:10.5px;font-weight:700;padding:3px 10px;border-radius:100px;background:rgba(16,169,104,.1);color:var(--green);letter-spacing:.4px}
.learn-card p{font-size:13.5px;color:var(--ink-2);line-height:1.78}
.learn-card p b{color:var(--ink);font-weight:700}
.learn-list{margin:12px 0 0;display:flex;flex-direction:column;gap:8px;font-size:13px;color:var(--ink-2)}
.learn-list li{list-style:none;display:flex;gap:9px;align-items:flex-start}
.learn-list li::before{content:'✓';color:var(--violet-2);font-weight:800;font-size:12px;margin-top:1px}
.learn-tips{margin-top:22px;background:#fff;border:1.5px dashed rgba(167,139,250,.55);border-radius:20px;padding:26px 30px}
.learn-tips h4{font-size:16px;font-weight:800;margin-bottom:14px;display:flex;align-items:center;gap:9px}
.prompt-chips{display:flex;flex-wrap:wrap;gap:10px}
.prompt-chip{font-size:13px;color:var(--ink-2);background:var(--bg-2);border:1px solid var(--bd);padding:9px 16px;border-radius:100px;transition:all .2s;cursor:default}
.prompt-chip:hover{background:var(--lav);border-color:var(--lilac);color:var(--violet);transform:translateY(-2px)}
.learn-cta{margin-top:26px;display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.learn-cta .hint{font-size:13px;color:var(--ink-3)}

/* ---------- 定价 ---------- */
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch}
.pricing-grid .price-card{background:#fff;border:1px solid var(--bd);border-radius:22px;padding:32px 28px;display:flex;flex-direction:column;position:relative;transition:all .35s cubic-bezier(.4,0,.2,1);box-shadow:var(--sh-sm)}
.pricing-grid .price-card:hover{transform:translateY(-5px);box-shadow:var(--sh)}
.pricing-grid .price-card.featured{border:1.5px solid rgba(167,139,250,.65);background:linear-gradient(170deg,#F7F2FD,#fff 52%);box-shadow:0 24px 60px rgba(139,92,246,.18)}
.price-badge{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--grad-soft);color:#fff;font-size:11px;font-weight:800;padding:5px 16px;border-radius:100px;letter-spacing:1px;box-shadow:0 4px 16px rgba(139,92,246,.35)}
.price-name{font-size:18px;font-weight:800}
.price-tag{font-size:12px;color:var(--ink-3);margin-top:5px;margin-bottom:20px}
.price-amount{font-size:40px;font-weight:800;letter-spacing:-1.4px;font-family:var(--ff-display)}
.price-amount .unit{font-size:14px;font-weight:600;color:var(--ink-3);letter-spacing:0}
.price-period{font-size:12.5px;color:var(--ink-3);margin:4px 0 22px}
.price-features{list-style:none;display:flex;flex-direction:column;gap:11px;font-size:13.5px;color:var(--ink-2);flex:1}
.price-features li{display:flex;gap:10px;align-items:flex-start}
.price-features li::before{content:'✓';color:var(--green);font-weight:800;font-size:12px;margin-top:1px;flex-shrink:0}
.price-btn{margin-top:26px;width:100%;padding:13px;border-radius:12px;font-size:14px;font-weight:800;transition:all .22s}
.price-btn.main{background:var(--grad-soft);color:#fff;box-shadow:0 6px 24px rgba(139,92,246,.35)}
.price-btn.main:hover{transform:translateY(-2px);box-shadow:0 10px 32px rgba(139,92,246,.5)}
.price-btn.sub{background:#fff;border:1.5px solid var(--bd-2);color:var(--ink)}
.price-btn.sub:hover{border-color:var(--violet-2);color:var(--violet);background:var(--lav)}
.price-credits{margin-top:22px;padding-top:20px;border-top:1px solid var(--bd)}
.price-credits-title{font-size:11.5px;color:var(--ink-3);font-weight:800;letter-spacing:1px;margin-bottom:13px}
.price-credits-tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.price-credits-tiers.two{grid-template-columns:repeat(2,1fr)}
.credit-tier{background:var(--bg-2);border:1px solid var(--bd);border-radius:11px;padding:11px 8px;text-align:center;transition:all .2s}
.credit-tier:hover{border-color:rgba(167,139,250,.6)}
.credit-tier.recommended{border-color:rgba(167,139,250,.65);background:var(--lav)}
.credit-tier-name{font-size:10.5px;color:var(--ink-3);font-weight:700}
.credit-tier-price{font-size:15px;font-weight:800;margin:4px 0 2px;color:var(--ink);font-family:var(--ff-display)}
.credit-tier-amount{font-size:10px;color:var(--violet);font-weight:700}
.credit-note{font-size:11px;color:var(--ink-3);margin-top:13px;text-align:center;line-height:1.7}
.credit-bar{margin-top:20px;display:flex;gap:18px;align-items:center;justify-content:space-between;flex-wrap:wrap;background:#fff;border:1px solid var(--bd);border-radius:18px;padding:22px 28px;box-shadow:var(--sh-sm)}
.credit-bar b{display:block;font-size:15px;font-weight:800;margin-bottom:4px}
.credit-bar span{font-size:13px;color:var(--ink-2);line-height:1.7}
.credit-bar .btn{padding:10px 20px;font-size:13px}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:820px;margin:0 auto}
.faq-list .faq-item{background:#fff;border:1px solid var(--bd);border-radius:16px;overflow:hidden;transition:all .3s;box-shadow:var(--sh-sm)}
.faq-list .faq-item:hover{border-color:var(--bd-2)}
.faq-item.open{border-color:rgba(167,139,250,.55)}
.faq-q{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:19px 24px;cursor:pointer;font-size:15.5px;font-weight:700;user-select:none}
.faq-q .ic{font-size:20px;color:var(--violet);transition:transform .3s;flex-shrink:0;font-weight:400}
.faq-item.open .faq-q .ic{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s cubic-bezier(.4,0,.2,1)}
.faq-item.open .faq-a{max-height:400px}
.faq-a-inner{padding:0 24px 20px;font-size:14px;color:var(--ink-2);line-height:1.85}
.faq-a-inner b{color:var(--ink);font-weight:700}

/* ---------- CTA ---------- */
.cta{position:relative;padding:100px 0 120px;overflow:hidden}
.cta::before{content:'';position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:1300px;height:720px;pointer-events:none;filter:blur(20px);
  background:
    radial-gradient(ellipse 32% 44% at 28% 48%, rgba(167,139,250,.30), transparent 64%),
    radial-gradient(ellipse 28% 38% at 74% 44%, rgba(251,146,60,.18), transparent 64%),
    radial-gradient(ellipse 36% 30% at 52% 72%, rgba(236,72,153,.12), transparent 68%);}
.cta-inner{position:relative;z-index:1;text-align:center;max-width:960px;margin:0 auto;padding:64px 40px 68px;background:#fff;border:1px solid rgba(167,139,250,.3);border-radius:32px;box-shadow:var(--sh-lg)}
.cta h2{font-size:clamp(30px,5vw,52px);font-weight:800;letter-spacing:-1.8px;line-height:1.14;margin-bottom:20px}
.cta h2 .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.cta p{font-size:15.5px;color:var(--ink-2);margin-bottom:38px;letter-spacing:.2px}

/* ---------- Footer ---------- */
.footer{border-top:1px solid var(--bd);padding:44px 0 36px;background:var(--bg-2)}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.footer-logo{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:800}
.footer-logo img{width:26px;height:26px;border-radius:7px}
.footer-links{display:flex;gap:26px;flex-wrap:wrap}
.footer-link{font-size:13px;color:var(--ink-2);transition:color .2s}
.footer-link:hover{color:var(--violet)}
.footer-copy{width:100%;text-align:center;font-size:12px;color:var(--ink-3);margin-top:26px;padding-top:24px;border-top:1px solid var(--bd);display:flex;justify-content:center;gap:18px;flex-wrap:wrap}

/* ---------- 模态框通用（JS 依赖类名，勿改） ---------- */
.overlay{position:fixed;inset:0;background:rgba(30,20,55,.5);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);z-index:9999;display:none;justify-content:center;align-items:center;padding:20px}
.overlay.show{display:flex;animation:fadeIn .22s ease}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.modal{background:#fff;border:1px solid var(--bd-2);border-radius:22px;padding:36px;width:100%;max-width:460px;position:relative;animation:slideUp .28s cubic-bezier(.34,1.4,.64,1);box-shadow:var(--sh-lg)}
@keyframes slideUp{from{opacity:0;transform:translateY(24px) scale(.97)}to{opacity:1;transform:translateY(0) scale(1)}}
.modal-close{position:absolute;top:16px;right:16px;width:32px;height:32px;border-radius:9px;display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--ink-3);transition:all .2s}
.modal-close:hover{background:var(--bg-2);color:var(--ink)}
.modal-title{font-size:21px;font-weight:800;margin-bottom:6px}
.modal-sub{font-size:13.5px;color:var(--ink-3);margin-bottom:28px}
.dl-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.dl-card{display:flex;flex-direction:column;align-items:center;gap:7px;padding:24px 8px 20px;background:var(--bg-2);border:1.5px solid var(--bd);border-radius:16px;transition:all .22s;color:var(--ink);position:relative;text-align:center}
.dl-card:hover{border-color:rgba(167,139,250,.6);background:var(--lav);transform:translateY(-3px);box-shadow:var(--sh)}
.dl-card svg{color:var(--violet-2);margin-bottom:2px}
.dl-card .dl-name{font-size:14px;font-weight:800;white-space:nowrap}
.dl-card .dl-meta{font-size:11px;color:var(--ink-3);white-space:nowrap}
.dl-card .dl-badge{font-size:9.5px;font-weight:800;padding:2.5px 9px;border-radius:100px;background:rgba(16,169,104,.12);color:var(--green);letter-spacing:.5px}
.dl-card.rec{border-color:rgba(139,92,246,.55);background:linear-gradient(180deg,#F5F0FD,#FDF6F3)}
.dl-card.rec::before{content:'为你推荐';position:absolute;top:-10px;left:50%;transform:translateX(-50%);font-size:9px;font-weight:800;color:#fff;background:var(--grad-soft);padding:3px 10px;border-radius:100px;letter-spacing:.5px;white-space:nowrap}
.dl-tips{margin-top:18px;padding:13px 17px;background:var(--bg-2);border-radius:13px;font-size:12px;color:var(--ink-2);line-height:1.9;display:flex;flex-direction:column;gap:2px}
.dl-tips b{color:var(--violet);font-weight:800}
.dl-tip b{color:var(--ink)}
.auth-form{display:flex;flex-direction:column;gap:16px}
.auth-field{display:flex;flex-direction:column;gap:6px}
.auth-input{background:var(--bg-2);border:1.5px solid var(--bd-2);border-radius:12px;padding:13px 16px;font-size:14.5px;color:var(--ink);outline:none;transition:all .2s;width:100%}
.auth-input:focus{border-color:var(--violet);box-shadow:0 0 0 3.5px rgba(124,58,237,.14);background:#fff}
.auth-input::placeholder{color:var(--ink-3)}
.auth-error{font-size:11.5px;color:var(--red);min-height:14px}
.auth-api-error{font-size:12.5px;color:var(--red);background:rgba(229,72,77,.07);border:1px solid rgba(229,72,77,.2);border-radius:10px;padding:10px 13px;display:none}
.auth-api-error.show{display:block}
.auth-btn{background:var(--grad-soft);color:#fff;padding:13px;border-radius:12px;font-size:15px;font-weight:800;transition:all .22s;box-shadow:0 6px 22px rgba(139,92,246,.3)}
.auth-btn:hover{transform:translateY(-1px);box-shadow:0 10px 30px rgba(139,92,246,.45)}
.auth-btn:disabled{opacity:.55;cursor:not-allowed;transform:none}
.auth-switch{text-align:center;font-size:13px;color:var(--ink-3);margin-top:6px}
.auth-switch a{color:var(--violet);font-weight:700;cursor:pointer}
.auth-code-row{display:flex;gap:10px}
.auth-code-btn{flex-shrink:0;background:var(--lav);border:1px solid rgba(167,139,250,.5);color:var(--violet);border-radius:12px;padding:0 18px;font-size:13px;font-weight:700;transition:all .2s;white-space:nowrap}
.auth-code-btn:hover{background:#E4D9FA}
.auth-code-btn:disabled{opacity:.5;cursor:not-allowed}
.purchase-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.pkg-card{background:var(--bg-2);border:1px solid var(--bd);border-radius:14px;padding:18px 12px;text-align:center;cursor:pointer;transition:all .22s;position:relative}
.pkg-card:hover{border-color:rgba(167,139,250,.6);transform:translateY(-3px)}
.pkg-card.recommended{border-color:rgba(167,139,250,.65);background:linear-gradient(180deg,var(--lav),var(--bg-2) 70%)}
.pkg-card.recommended::after{content:'推荐';position:absolute;top:-9px;left:50%;transform:translateX(-50%);font-size:10px;font-weight:800;background:var(--grad-soft);color:#fff;padding:2px 10px;border-radius:100px}
.pkg-name{font-size:12.5px;color:var(--ink-2);font-weight:700}
.pkg-price{font-size:23px;font-weight:800;margin:6px 0 3px;font-family:var(--ff-display)}
.pkg-points{font-size:11.5px;color:var(--violet);font-weight:700}
.pkg-desc{font-size:10.5px;color:var(--ink-3);margin-top:5px;line-height:1.5}
.purchase-loading{grid-column:1/-1;text-align:center;padding:36px 0;color:var(--ink-3);font-size:13.5px}
.purchase-success{text-align:center;padding:28px 0 12px}
.purchase-success-icon{font-size:46px;margin-bottom:14px}
.purchase-success-msg{font-size:19px;font-weight:800;margin-bottom:8px}
.purchase-success-detail{font-size:13px;color:var(--ink-2);line-height:1.8}
.purchase-packages.hide,.purchase-result{display:none}
.purchase-result.show{display:block}
.toast{position:fixed;bottom:32px;left:50%;transform:translate(-50%,16px);background:#2A2140;border:1px solid rgba(255,255,255,.14);color:#FDFBF8;font-size:13.5px;padding:12px 24px;border-radius:100px;box-shadow:var(--sh-lg);opacity:0;pointer-events:none;transition:all .3s;z-index:10001;white-space:nowrap}
.toast.show{opacity:1;transform:translate(-50%,0)}

.nav-toggle{display:none;width:38px;height:38px;border-radius:10px;background:#fff;border:1px solid var(--bd-2);cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:4px;padding:0}
.nav-toggle span{display:block;width:16px;height:1.8px;border-radius:2px;background:var(--ink);transition:all .25s}
.nav-toggle.open span:nth-child(1){transform:translateY(5.8px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-5.8px) rotate(-45deg)}
.mobile-menu{position:fixed;top:56px;right:0;bottom:0;width:min(62vw,240px);background:rgba(251,248,243,.98);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);border-left:1px solid var(--bd-2);z-index:999;display:flex;flex-direction:column;padding:18px 14px;gap:2px;transform:translateX(100%);transition:transform .3s cubic-bezier(.4,0,.2,1);overflow-y:auto}
.mobile-menu.open{transform:translateX(0)}
.mobile-menu a{display:block;padding:10px 14px;border-radius:10px;color:var(--ink-2);font-size:14px;font-weight:600;transition:all .15s}
.mobile-menu a:hover,.mobile-menu a:active{color:var(--ink);background:var(--lav)}
.mobile-menu .mobile-cta{display:flex;gap:10px;margin-top:16px;padding:0 6px}
.mobile-menu .mobile-cta .btn{flex:1;padding:12px;border-radius:11px;font-size:14px;font-weight:700}
.mobile-menu .mobile-cta .btn-primary{background:var(--grad-soft);color:#fff}
.mobile-menu .mobile-cta .btn-ghost{background:#fff;border:1px solid var(--bd-2);color:var(--ink)}
/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.2,.6,.2,1),transform .7s cubic-bezier(.2,.6,.2,1)}
.reveal.visible{opacity:1;transform:translateY(0)}


/* ═══════════════════════════════════════════════════════════
   子页组件（文档 / 学习中心 / 定价）
   ═══════════════════════════════════════════════════════════ */

/* ---------- 页头 ---------- */
.page-hero{padding:130px 0 20px;text-align:center}
.page-hero h1{font-family:var(--ff-display);font-size:clamp(30px,4.4vw,46px);font-weight:700;letter-spacing:-.03em;margin-bottom:14px}
.page-hero p{font-size:15.5px;color:var(--ink-2);line-height:1.85;max-width:680px;margin:0 auto}
.page-hero .hl{background:var(--grad-soft);-webkit-background-clip:text;background-clip:text;color:transparent}
.page-chip{display:inline-block;font-size:12px;font-weight:700;color:var(--violet);background:var(--lav);padding:5px 14px;border-radius:100px;margin-bottom:16px}
.crumb{display:flex;justify-content:center;align-items:center;gap:7px;font-size:12.5px;color:var(--ink-3);margin-bottom:16px}
.crumb a{color:var(--ink-3)}
.crumb a:hover{color:var(--violet)}

/* ---------- 粘性锚点条 ---------- */
.subnav{position:sticky;top:62px;z-index:60;background:rgba(251,248,243,.92);backdrop-filter:blur(16px) saturate(1.4);-webkit-backdrop-filter:blur(16px) saturate(1.4);border-bottom:1px solid var(--bd);padding:11px 0;margin-bottom:40px}
.subnav-inner{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none}
.subnav-inner::-webkit-scrollbar{display:none}
.subnav a{font-size:13px;font-weight:600;color:var(--ink-2);padding:7px 15px;border-radius:100px;white-space:nowrap;border:1px solid transparent;transition:all .2s}
.subnav a:hover{background:var(--lav);color:var(--violet)}
.subnav a.on{background:var(--grad-soft);color:#fff}

/* ---------- 文档页 ---------- */
.doc-layout{display:grid;grid-template-columns:224px minmax(0,1fr);gap:46px;align-items:start}
.doc-side{position:sticky;top:132px;font-size:13.5px}
.doc-side h6{font-size:11.5px;font-weight:800;letter-spacing:1px;color:var(--ink-3);margin-bottom:12px}
.doc-side a{display:block;color:var(--ink-2);padding:6px 11px;border-radius:9px;border-left:2px solid transparent;line-height:1.5;margin-bottom:2px}
.doc-side a:hover{background:#fff;color:var(--violet)}
.doc-side a.on{color:var(--violet);font-weight:700;background:#fff;border-left-color:var(--violet)}
.doc-side .side-cta{margin-top:22px;padding:17px;background:#fff;border:1px solid var(--bd);border-radius:15px;box-shadow:var(--sh-sm)}
.doc-side .side-cta b{display:block;font-size:13px;margin-bottom:6px}
.doc-side .side-cta p{font-size:11.5px;color:var(--ink-3);line-height:1.65;margin-bottom:12px}
.doc-sec{margin-bottom:58px;scroll-margin-top:132px}
.doc-sec>h2{font-family:var(--ff-display);font-size:23px;font-weight:700;letter-spacing:-.02em;margin-bottom:10px;display:flex;align-items:center;gap:11px}
.doc-sec>h2 .n{font-size:12px;font-weight:800;color:#fff;background:var(--grad-soft);width:26px;height:26px;border-radius:9px;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}
.doc-sec>p.lead{font-size:14.5px;color:var(--ink-2);line-height:1.85;margin-bottom:22px}
.doc-card{background:#fff;border:1px solid var(--bd);border-radius:18px;padding:24px 26px;box-shadow:var(--sh-sm);margin-bottom:16px}
.doc-card h3{font-size:16px;font-weight:800;margin-bottom:10px;display:flex;align-items:center;gap:9px;flex-wrap:wrap}
.doc-card h3 .t-chip{font-size:10px;font-weight:800;color:var(--violet);background:var(--lav);padding:3px 9px;border-radius:100px}
.doc-card p{font-size:13.8px;color:var(--ink-2);line-height:1.85}
.doc-card ul{margin:10px 0 0 18px;font-size:13.8px;color:var(--ink-2);line-height:2}
.doc-card li::marker{color:var(--lilac)}
.doc-card b{color:var(--ink)}
.doc-note{display:flex;gap:11px;padding:15px 18px;border-radius:14px;font-size:13px;line-height:1.8;margin:14px 0;background:var(--lav);color:#4C3A78}
.doc-note.warn{background:#FDF3DC;color:#7A5410}
.doc-note.ok{background:#E7F6EE;color:#0B5B3C}
.doc-note b{color:inherit}
.doc-note svg{flex-shrink:0;margin-top:3px}
.kbd{font-family:var(--ff-mono);font-size:12px;background:#fff;border:1px solid var(--bd-2);border-bottom-width:2px;border-radius:7px;padding:2px 8px;color:var(--ink);display:inline-block;margin:0 2px;white-space:nowrap}
.doc-code{background:#2A2140;border-radius:14px;padding:18px 20px;font-family:var(--ff-mono);font-size:12.5px;line-height:1.95;color:#E6E0F5;overflow-x:auto;margin:14px 0;white-space:pre}
.doc-code .c{color:#A69BC7}
.doc-code .k{color:#C4B5FD}
.doc-code .s{color:#F9A8D4}
.doc-code .g{color:#6EE7B7}
.doc-table{width:100%;border-collapse:collapse;font-size:13.5px;margin:14px 0;background:#fff;border-radius:14px;overflow:hidden;box-shadow:var(--sh-sm)}
.doc-table th{background:var(--bg-2);text-align:left;padding:12px 16px;font-weight:800;font-size:12.5px;color:var(--ink-2);letter-spacing:.3px}
.doc-table td{padding:13px 16px;border-top:1px solid var(--bd);color:var(--ink-2);vertical-align:top}
.doc-table td b{color:var(--ink)}
.step-list{counter-reset:st;display:flex;flex-direction:column;gap:13px;margin-top:8px}
.step-item{display:flex;gap:13px;align-items:flex-start}
.step-item .sn{counter-increment:st;flex-shrink:0;width:25px;height:25px;border-radius:9px;background:var(--lav);color:var(--violet);font-size:12px;font-weight:800;display:flex;align-items:center;justify-content:center;margin-top:1px}
.step-item .sn::before{content:counter(st)}
.step-item .st-b{font-size:13.8px;color:var(--ink-2);line-height:1.85}
.step-item .st-b b{color:var(--ink);display:block;font-size:14px;margin-bottom:2px}

/* ---------- 学习中心 ---------- */
.path-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:16px}
.path-card{background:#fff;border:1px solid var(--bd);border-radius:17px;padding:22px 20px;box-shadow:var(--sh-sm);transition:all .3s cubic-bezier(.4,0,.2,1)}
.path-card:hover{transform:translateY(-4px);box-shadow:var(--sh);border-color:rgba(167,139,250,.5)}
.path-card .pnum{font-family:var(--ff-display);font-size:34px;font-weight:800;background:var(--grad-soft);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1;margin-bottom:10px}
.path-card h4{font-size:15.5px;font-weight:800;margin-bottom:7px}
.path-card p{font-size:13px;color:var(--ink-2);line-height:1.75}
.path-card .ptime{font-size:10.5px;font-weight:800;color:var(--teal);background:#E0F5F4;padding:3px 9px;border-radius:100px;display:inline-block;margin-top:11px}
.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.case-card{background:#fff;border:1px solid var(--bd);border-radius:18px;padding:22px 24px;box-shadow:var(--sh-sm);transition:all .3s cubic-bezier(.4,0,.2,1)}
.case-card:hover{transform:translateY(-3px);box-shadow:var(--sh);border-color:rgba(167,139,250,.5)}
.case-card .cq{font-size:14.5px;font-weight:800;line-height:1.65;margin-bottom:8px}
.case-card .cq::before{content:'“';color:var(--violet)}
.case-card .cq::after{content:'”';color:var(--violet)}
.case-card .cm{font-size:11.5px;color:var(--ink-3);margin-bottom:13px;display:flex;gap:7px;flex-wrap:wrap}
.case-card .cm span{background:var(--bg-2);padding:2.5px 9px;border-radius:100px}
.case-card ol{margin-left:17px;font-size:13px;color:var(--ink-2);line-height:2}
.case-card li::marker{color:var(--lilac);font-weight:700}
.case-card .cres{margin-top:13px;padding-top:13px;border-top:1px dashed var(--bd);font-size:12.5px;color:var(--ink-3);line-height:1.75}
.case-card .cres b{color:var(--green)}
.skill-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.skill-row span{font-size:12px;color:var(--ink-2);background:#fff;border:1px solid var(--bd);padding:6px 13px;border-radius:100px;font-weight:600}
.tip-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.tip-card{background:linear-gradient(135deg,#F8F4FE,#FDF6F3);border:1px solid var(--bd);border-radius:18px;padding:22px 24px}
.tip-card h4{font-size:15px;font-weight:800;margin-bottom:8px;display:flex;align-items:center;gap:8px}
.tip-card p{font-size:13.2px;color:var(--ink-2);line-height:1.8}
.tip-card code{font-family:var(--ff-mono);font-size:12px;background:#fff;border:1px solid var(--bd);border-radius:6px;padding:1.5px 7px;color:var(--violet)}

/* ---------- 定价页 ---------- */
.pricing-grid{align-items:start}
.calc-box{background:#fff;border:1px solid var(--bd);border-radius:20px;padding:26px 28px;box-shadow:var(--sh-sm)}
.calc-row{display:flex;align-items:center;gap:14px;margin-bottom:14px;font-size:13.5px;color:var(--ink-2)}
.calc-row input[type=range]{flex:1;accent-color:var(--violet);height:4px}
.calc-out{display:flex;justify-content:space-between;align-items:baseline;padding:16px 18px;background:var(--bg-2);border-radius:14px;margin-top:10px;flex-wrap:wrap;gap:8px}
.calc-out b{font-size:22px;font-family:var(--ff-display)}
.doc-foot-cta{margin-top:46px;text-align:center;padding:36px 24px;border-radius:22px;background:linear-gradient(135deg,#F6F1FE,#FDF4F2);border:1px solid var(--bd)}

/* ---------- 子页响应式 ---------- */
@media (max-width:1020px){
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .doc-layout{grid-template-columns:1fr;gap:26px}
  .doc-side{position:static;display:flex;flex-wrap:wrap;gap:6px}
  .doc-side h6{display:none}
  .doc-side a{border:1px solid var(--bd);border-radius:100px;padding:6px 13px;background:#fff;margin-bottom:0}
  .doc-side .side-cta{display:none}
  .path-grid{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:1fr}
  .tip-grid{grid-template-columns:1fr}
  .pricing-grid{grid-template-columns:1fr}
  .subnav{top:56px}
}
@media (max-width:640px){
  .page-hero{padding-top:104px}
  .path-grid{grid-template-columns:1fr}
  .doc-card{padding:20px 18px}
  .doc-table{font-size:12.5px}
  .doc-table th,.doc-table td{padding:10px 12px}
  .doc-sec>h2{font-size:20px}
}