:root{
    --bg:#ffffff;
    --bg-soft:#f8f7fc;
    --surface:#ffffff;
    --primary:#7b5bff;
    --primary-hover:#6a48f0;
    --deep:#2b1b5e;
    --text:#44546a;
    --muted:#8a8a96;
    --border:#ecebf4;
    --accent-soft:#f5f3fb;
    --accent-line:#ede9ff;
    --accent-light:#b7a6ff;
    --shadow-sm:0 1px 2px rgba(43,27,94,.04),0 2px 8px rgba(43,27,94,.05);
    --shadow-md:0 6px 20px rgba(43,27,94,.08),0 2px 6px rgba(43,27,94,.04);
    --shadow-lg:0 24px 48px rgba(43,27,94,.16),0 8px 20px rgba(43,27,94,.08);
    --radius-sm:10px;
    --radius-md:16px;
    --radius-lg:24px;
    --max-w:1200px;
    --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  }
  *{margin:0;padding:0;box-sizing:border-box}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
  body{
    font-family:var(--font);
    color:var(--text);
    background:var(--bg);
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
    -moz-osx-font-smoothing:grayscale;
    overflow-x:hidden;
  }
  a{color:inherit;text-decoration:none}
  ul{list-style:none}
  .container{max-width:var(--max-w);margin:0 auto;padding:0 24px}

  /* ===== 页头 ===== */
  .header{
    position:sticky;top:0;z-index:100;
    background:rgba(255,255,255,.85);
    backdrop-filter:saturate(180%) blur(14px);
    -webkit-backdrop-filter:saturate(180%) blur(14px);
    border-bottom:1px solid var(--border);
  }
  .header-inner{
    display:flex;align-items:center;justify-content:space-between;
    height:68px;
  }
  .logo{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--deep);font-size:18px;letter-spacing:-.01em}
  .logo-mark{
    width:34px;height:34px;border-radius:9px;
    background:linear-gradient(135deg,var(--primary),#a78bff);
    display:grid;place-items:center;color:#fff;flex:none;
    box-shadow:0 4px 12px rgba(123,91,255,.35);
  }
  .logo-mark svg{width:18px;height:18px}
  .logo .sub{font-weight:500;color:var(--muted);font-size:12px;margin-left:2px}
  .nav{display:flex;align-items:center;gap:6px}
  .nav a{
    padding:8px 16px;border-radius:9px;font-size:14.5px;color:var(--text);
    font-weight:500;transition:color .18s,background .18s;
  }
  .nav a:hover{color:var(--deep);background:var(--accent-soft)}
  .nav a.nav-cta{color:#fff;background:var(--deep);margin-left:6px}
  .nav a.nav-cta:hover{background:#3a2680;color:#fff}
  .nav-toggle{display:none;background:none;border:none;cursor:pointer;color:var(--deep);padding:6px}
  .nav-toggle svg{width:24px;height:24px}

  /* ===== Hero ===== */
  .hero{padding:72px 0 48px;text-align:center}
  .hero .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    background:var(--accent-soft);color:var(--primary);
    font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px;
    border:1px solid var(--accent-line);margin-bottom:22px;
  }
  .hero h1{
    font-size:clamp(30px,5vw,52px);color:var(--deep);
    font-weight:800;letter-spacing:-.02em;line-height:1.2;
  }
  .hero h1 .grad{
    background:linear-gradient(120deg,var(--primary),#a78bff);
    -webkit-background-clip:text;background-clip:text;color:transparent;
  }
  .hero p{
    max-width:560px;margin:18px auto 0;font-size:17px;color:var(--muted);
  }

  /* ===== 计费切换 ===== */
  .billing{
    display:flex;justify-content:center;margin:38px 0 20px;
  }
  .billing-toggle{
    position:relative;display:flex;background:var(--accent-soft);
    border:1px solid var(--accent-line);border-radius:999px;padding:5px;
  }
  .billing-option{
    position:relative;z-index:1;border:none;background:transparent;cursor:pointer;
    padding:10px 24px;border-radius:999px;font-size:14.5px;font-weight:600;
    color:var(--text);transition:color .25s;font-family:var(--font);display:flex;align-items:center;gap:8px;
  }
  .billing-option.active{color:#fff}
  .billing-thumb{
    position:absolute;top:5px;left:5px;height:calc(100% - 10px);
    background:var(--deep);border-radius:999px;transition:transform .3s cubic-bezier(.4,0,.2,1),width .3s cubic-bezier(.4,0,.2,1);
  }
  .save-badge{
    background:var(--primary);color:#fff;font-size:11px;font-weight:700;
    padding:2px 8px;border-radius:999px;line-height:1.4;
  }
  .billing-note{text-align:center;font-size:13px;color:var(--muted);margin-bottom:48px}
  .billing-note b{color:var(--deep)}

  /* ===== 价格卡片 ===== */
  .pricing-grid{
    display:grid;grid-template-columns:repeat(4,1fr);gap:22px;
    align-items:stretch;margin-bottom:80px;
  }
  .card{
    position:relative;background:var(--surface);border:1px solid var(--border);
    border-radius:var(--radius-md);padding:28px 24px;display:flex;flex-direction:column;
    box-shadow:var(--shadow-sm);transition:transform .25s,box-shadow .25s,border-color .25s;
  }
  .card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:var(--accent-line)}
  .card.featured{
    background:linear-gradient(180deg,#2b1b5e 0%,#352a72 100%);
    border-color:transparent;color:#fff;box-shadow:var(--shadow-lg);
  }
  .card.featured:hover{border-color:transparent;box-shadow:0 30px 60px rgba(43,27,94,.28)}
  .badge{
    position:absolute;top:-13px;left:50%;transform:translateX(-50%);
    background:var(--primary);color:#fff;font-size:12px;font-weight:700;
    padding:5px 16px;border-radius:999px;white-space:nowrap;box-shadow:0 4px 12px rgba(123,91,255,.4);
  }
  .plan-name{font-size:17px;font-weight:700;color:var(--deep);letter-spacing:-.01em}
  .card.featured .plan-name{color:#fff}
  .plan-desc{font-size:13px;color:var(--muted);margin-top:6px;min-height:40px}
  .card.featured .plan-desc{color:var(--accent-light)}
  .price{display:flex;align-items:baseline;gap:2px;margin-top:20px}
  .price .currency{font-size:22px;font-weight:700;color:var(--deep)}
  .price .amount{font-size:48px;font-weight:800;color:var(--deep);letter-spacing:-.03em;line-height:1}
  .price .period{font-size:15px;color:var(--muted);font-weight:500}
  .card.featured .currency,.card.featured .amount{color:#fff}
  .card.featured .period{color:var(--accent-light)}
  .price-note{font-size:12.5px;color:var(--muted);margin-top:8px;min-height:18px}
  .card.featured .price-note{color:var(--accent-light)}
  .cta{
    display:block;text-align:center;margin-top:22px;padding:13px 16px;border-radius:12px;
    font-size:15px;font-weight:700;color:var(--deep);background:var(--accent-soft);
    border:1px solid var(--accent-line);transition:background .2s,transform .15s;
  }
  .cta:hover{background:var(--accent-line)}
  .cta:active{transform:scale(.98)}
  .card.featured .cta{background:var(--primary);color:#fff;border-color:transparent}
  .card.featured .cta:hover{background:var(--primary-hover)}
  .features{margin-top:26px;border-top:1px solid var(--border);padding-top:22px;display:flex;flex-direction:column;gap:13px}
  .card.featured .features{border-top-color:rgba(255,255,255,.16)}
  .features li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--text)}
  .card.featured .features li{color:rgba(255,255,255,.92)}
  .features li .ic{flex:none;margin-top:2px;display:grid;place-items:center}
  .features li .ic svg{width:18px;height:18px}
  .features li .ic.check svg{color:var(--primary)}
  .card.featured .features li .ic.check svg{color:#a78bff}

  /* ===== 功能对比矩阵 ===== */
  .matrix-section{background:var(--bg-soft);border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:72px 0}
  .section-head{text-align:center;margin-bottom:44px}
  .section-head .tag{font-size:13px;font-weight:600;color:var(--primary);text-transform:uppercase;letter-spacing:.08em}
  .section-head h2{font-size:clamp(26px,4vw,36px);color:var(--deep);font-weight:800;letter-spacing:-.02em;margin-top:10px}
  .section-head p{color:var(--muted);margin-top:12px;font-size:15.5px}
  .matrix-wrap{overflow-x:auto;border-radius:var(--radius-md);background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow-sm)}
  table.matrix{border-collapse:collapse;width:100%;min-width:720px}
  .matrix thead th{
    background:var(--surface);padding:18px 16px;font-size:14px;color:var(--deep);
    text-align:center;font-weight:700;position:sticky;top:68px;z-index:3;
    border-bottom:1px solid var(--border);
  }
  .matrix thead th.col-feat{text-align:left;width:200px;z-index:4;background:var(--surface);min-width:180px}
  .matrix thead th .plan-tag{display:block;font-size:11.5px;font-weight:500;color:var(--muted);margin-top:2px}
  .matrix thead th.col-feat .plan-tag{color:var(--primary)}
  .matrix tbody td{
    padding:14px 16px;text-align:center;font-size:13.5px;color:var(--text);
    border-bottom:1px solid var(--border);vertical-align:middle;
  }
  .matrix tbody td.col-feat{
    text-align:left;color:var(--deep);font-weight:600;font-size:13.5px;
    position:sticky;left:0;background:var(--surface);z-index:2;
  }
  .matrix tbody tr:last-child td{border-bottom:none}
  .matrix tbody tr.group-row td{
    background:var(--accent-soft);color:var(--primary);font-weight:700;font-size:13px;
    text-align:left;padding:12px 16px;letter-spacing:.02em;
  }
  .matrix tbody tr.group-row td.col-feat{position:sticky;left:0;background:var(--accent-soft);z-index:2}
  .matrix tbody tr:hover td.col-feat{background:#f4f2fb}
  .cell-val{font-weight:700;color:var(--deep)}
  .cell-num{color:var(--deep);font-weight:700}
  .cell-plain{color:var(--muted)}
  .mark{display:inline-grid;place-items:center}
  .mark svg{width:18px;height:18px}
  .mark.check svg{color:var(--primary)}
  .mark.cross svg{color:#d6d4e0}
  .mark.dash{color:#d6d4e0;font-size:16px;font-weight:400}
  .matrix tbody tr.featured-col td{background:#faf9ff}
  .matrix tbody tr.featured-col td.col-feat{background:#faf9ff}

  /* ===== FAQ ===== */
  .faq-section{padding:72px 0}
  .faq-list{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
  .faq-item{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);overflow:hidden;transition:border-color .2s,box-shadow .2s}
  .faq-item.open{border-color:var(--accent-line);box-shadow:var(--shadow-sm)}
  .faq-question{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:20px 22px;background:none;border:none;cursor:pointer;text-align:left;
    font-family:var(--font);font-size:16px;font-weight:600;color:var(--deep);
  }
  .faq-question .q-ic{
    flex:none;width:26px;height:26px;border-radius:8px;display:grid;place-items:center;
    background:var(--accent-soft);color:var(--primary);transition:transform .25s,background .25s;
  }
  .faq-question .q-ic svg{width:14px;height:14px}
  .faq-item.open .q-ic{transform:rotate(45deg);background:var(--primary);color:#fff}
  .faq-answer{
    max-height:0;overflow:hidden;transition:max-height .32s ease;
  }
  .faq-answer-inner{padding:0 22px 22px;font-size:14.5px;color:var(--text);line-height:1.75}
  .faq-hint{text-align:center;color:var(--muted);font-size:13.5px;margin-top:28px}
  .faq-hint a{color:var(--primary);font-weight:600}

  /* ===== CTA 横幅 ===== */
  .cta-banner{padding:0 24px 72px}
  .cta-banner-inner{
    max-width:var(--max-w);margin:0 auto;border-radius:var(--radius-lg);
    background:linear-gradient(120deg,#2b1b5e 0%,#5b3fd4 100%);
    padding:56px 40px;text-align:center;color:#fff;position:relative;overflow:hidden;
  }
  .cta-banner-inner::before{
    content:"";position:absolute;inset:0;
    background:radial-gradient(600px 300px at 20% 0%,rgba(167,139,255,.35),transparent 60%),
               radial-gradient(500px 300px at 90% 100%,rgba(123,91,255,.4),transparent 60%);
    pointer-events:none;
  }
  .cta-banner-inner h2{font-size:clamp(24px,4vw,36px);font-weight:800;letter-spacing:-.02em;position:relative}
  .cta-banner-inner p{color:var(--accent-light);margin-top:14px;font-size:16px;position:relative}
  .cta-banner-inner .actions{display:flex;justify-content:center;gap:14px;margin-top:30px;flex-wrap:wrap;position:relative}
  .btn{
    display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:12px;
    font-size:15.5px;font-weight:700;cursor:pointer;border:none;transition:transform .15s,box-shadow .2s,background .2s;
  }
  .btn:active{transform:scale(.98)}
  .btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(0,0,0,.25)}
  .btn-primary:hover{background:var(--primary-hover)}
  .btn-ghost{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.25)}
  .btn-ghost:hover{background:rgba(255,255,255,.2)}
  .cta-banner-inner .tel{color:var(--accent-light);font-size:14px;margin-top:20px;position:relative}
  .cta-banner-inner .tel b{color:#fff;font-weight:700;letter-spacing:.02em}

  /* ===== 页脚 ===== */
  .footer{border-top:1px solid var(--border);padding:48px 0 36px;background:var(--bg-soft)}
  .footer-inner{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap}
  .footer-brand{max-width:340px}
  .footer-brand .logo{margin-bottom:14px}
  .footer-brand p{font-size:14px;color:var(--muted);line-height:1.7}
  .footer-cols{display:flex;gap:56px;flex-wrap:wrap}
  .footer-col h4{font-size:14px;color:var(--deep);font-weight:700;margin-bottom:16px}
  .footer-col a{display:block;font-size:14px;color:var(--muted);padding:5px 0;transition:color .18s}
  .footer-col a:hover{color:var(--primary)}
  .footer-bottom{
    margin-top:40px;padding-top:24px;border-top:1px solid var(--border);
    display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
    font-size:13px;color:var(--muted);
  }

  /* ===== 响应式 ===== */
  @media (max-width:1024px){
    .pricing-grid{grid-template-columns:repeat(2,1fr)}
  }
  @media (max-width:720px){
    .nav{position:fixed;top:68px;left:0;right:0;flex-direction:column;align-items:stretch;
      background:#fff;border-bottom:1px solid var(--border);padding:12px 20px 20px;
      box-shadow:var(--shadow-md);transform:translateY(-8px);opacity:0;pointer-events:none;transition:opacity .2s,transform .2s}
    .nav.open{transform:translateY(0);opacity:1;pointer-events:auto}
    .nav a{padding:12px 16px;text-align:center}
    .nav a.nav-cta{margin-left:0}
    .nav-toggle{display:block}
    .hero{padding:48px 0 32px}
    .pricing-grid{grid-template-columns:1fr;gap:18px}
    .billing-option{padding:10px 18px;font-size:14px}
    .section-head h2{font-size:26px}
    .matrix-section,.faq-section{padding:52px 0}
    .cta-banner-inner{padding:44px 22px}
    .footer-inner{flex-direction:column;gap:32px}
    .footer-bottom{flex-direction:column;text-align:center}
  }

/* =========================================================
   兼容层：旧组件/后台沿用的一组变量别名，映射到 MYHA 设计稿配色
   （新增组件请优先使用设计稿变量：--primary/--deep/--text/--muted/--border/--bg/--bg-soft）
   ========================================================= */
:root{
  /* 品牌色别名 */
  --brand:var(--primary);
  --brand-strong:var(--primary-hover);
  --brand-deep:var(--deep);
  --brand-ink:var(--deep);
  --brand-bright:var(--primary);
  --grad-mid:#a78bff;
  --brand-rgb:123,91,255;
  --accent:var(--accent-light);
  --accent-strong:#9d86ff;
  --accent-rgb:183,166,255;
  /* 中性别名 */
  --ink:var(--deep);
  --ink-rgb:43,27,94;
  --text-2:var(--text);
  --text-3:var(--muted);
  --bg-soft2:var(--accent-soft);
  --border-strong:var(--accent-line);
  --border-dark:rgba(255,255,255,.16);
  --brand-tint:var(--accent-soft);
  --brand-tint2:var(--accent-line);
  --on-dark:#e7e6e6;
  --on-dark-2:var(--accent-light);
  --success:#10b981; --error:#dc2626;
  --shadow-brand:var(--shadow-md);
  --mark-bg:#ede9ff;
  /* 尺寸别名（后台与旧组件沿用） */
  --s-1:.25rem;--s-2:.5rem;--s-3:.75rem;--s-4:1rem;--s-5:1.25rem;--s-6:1.5rem;
  --s-8:2rem;--s-10:2.5rem;--s-12:3rem;--s-14:3.5rem;--s-16:4rem;--s-20:5rem;
  --fs-xs:.75rem;--fs-sm:.875rem;--fs-base:1rem;--fs-md:1.0625rem;--fs-lg:1.125rem;
  --fs-xl:1.375rem;--fs-2xl:1.75rem;--fs-3xl:2.25rem;
  --r-sm:10px;--r-md:16px;--r-lg:24px;--r-xl:26px;--r-pill:999px;--r-btn:12px;--r-card:16px;--r-code:10px;
  --sh-1:var(--shadow-sm);--sh-2:var(--shadow-md);
  --sh-btn:0 1px 2px rgba(123,91,255,.2);
  --sh-btn-hover:0 8px 20px -8px rgba(123,91,255,.5);
  --t-fast:150ms ease;--t-base:280ms cubic-bezier(.4,0,.2,1);
  --container:1200px;
  --header-h:68px;
  --font-sans:var(--font);
  --font-mono:"SF Mono","JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
}

/* =========================================================
   补充组件：设计稿未覆盖的部分（表单 / 筛选 / 分栏FAQ / 反馈 / 后台通用）
   ========================================================= */

/* ---------- 通用按钮扩展 ---------- */
.btn{font-family:var(--font)}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(123,91,255,.28)}
.btn-primary:hover{background:var(--primary-hover)}
.btn-secondary{background:var(--accent-soft);color:var(--deep);border:1px solid var(--accent-line)}
.btn-secondary:hover{background:var(--accent-line)}
.btn-outline{background:#fff;color:var(--primary);border:1px solid var(--primary)}
.btn-outline:hover{background:var(--accent-soft)}
.btn-block{width:100%;justify-content:center}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:10px}
.btn-lg{padding:15px 32px;font-size:16px}
.btn[disabled],.btn[aria-disabled="true"]{opacity:.55;cursor:not-allowed;pointer-events:none}

/* ---------- 区块骨架 ---------- */
.section{padding:72px 0}
.section--soft{background:var(--bg-soft);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.section--deep{background:linear-gradient(120deg,#2b1b5e 0%,#5b3fd4 100%);color:#fff}
.section--deep h2,.section--deep h3{color:#fff}
.section--deep p{color:var(--accent-light)}
.page-head{padding:56px 0 40px;text-align:center}
.page-head h1{font-size:clamp(28px,4.6vw,44px);color:var(--deep);font-weight:800;letter-spacing:-.02em}
.page-head p{max-width:640px;margin:16px auto 0;color:var(--muted);font-size:16.5px}
.breadcrumb{font-size:13.5px;color:var(--muted);margin-bottom:14px}
.breadcrumb a:hover{color:var(--primary)}
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media (max-width:1024px){.grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:720px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}
.center{text-align:center}
.muted{color:var(--muted)}
.mt-6{margin-top:24px}.mt-8{margin-top:32px}.mt-12{margin-top:48px}
.container-narrow{max-width:820px;margin:0 auto;padding:0 24px}

/* ---------- 卡片扩展 ---------- */
.card .card-ico{
  display:grid;place-items:center;width:46px;height:46px;border-radius:12px;
  background:var(--accent-soft);color:var(--primary);margin-bottom:16px;font-size:22px;
}
.card h3{margin-bottom:8px}
.card p{font-size:14.5px;color:var(--muted);line-height:1.7}

/* ---------- 数据/指标 ---------- */
.stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.stat-box{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);
  padding:26px 24px;box-shadow:var(--shadow-sm);text-align:center;
}
.stat-box b{display:block;font-size:36px;font-weight:800;color:var(--deep);letter-spacing:-.02em;line-height:1.15}
.stat-box span{display:block;font-size:14px;color:var(--muted);margin-top:6px}
.stat-box em{display:block;font-style:normal;font-size:12.5px;color:var(--primary);margin-top:8px;font-weight:600}
@media (max-width:720px){.stats{grid-template-columns:1fr}}

/* ---------- 表单 ---------- */
.form{padding:32px;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--surface);box-shadow:var(--shadow-sm)}
.field{margin-bottom:20px}
.field label{display:block;margin-bottom:8px;font-size:14px;font-weight:600;color:var(--deep)}
.req{color:#dc2626}
.field input,.field select,.field textarea{
  width:100%;padding:12px 16px;border:1px solid var(--border);border-radius:12px;
  font-family:var(--font);font-size:16px;color:var(--text);background:#fff;
  transition:border-color .18s,box-shadow .18s;
}
.field textarea{min-height:130px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(123,91,255,.14);
}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-color:#dc2626;background:rgba(220,38,38,.03)}
.field__err{min-height:18px;margin:6px 0 0;font-size:12px;color:#dc2626}
.check{display:flex;gap:12px;align-items:flex-start;cursor:pointer;font-weight:400}
.check input{width:18px;height:18px;margin-top:2px;accent-color:var(--primary);flex:none}
.check span{font-size:12.5px;color:var(--muted);line-height:1.65}
.form__note{margin-top:16px;font-size:12px;color:var(--muted);text-align:center}
.form-success{display:flex;gap:14px;align-items:flex-start;margin-top:20px;padding:18px;border-radius:var(--radius-sm);background:#f0fdf9;border:1px solid #a7f3d0}
.form-success__ico{flex:none;display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:#10b981;color:#fff;font-weight:700}
.form-success h4{margin:0 0 2px;color:#065f46;font-size:14.5px}
.form-success p{margin:0;font-size:12.5px;color:#047857}

/* ---------- 筛选 / 搜索 ---------- */
.filter{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:28px}
.filter button{
  min-height:38px;padding:0 18px;border:1px solid var(--border);border-radius:999px;
  background:var(--surface);font-family:var(--font);font-size:14px;font-weight:600;
  color:var(--text);cursor:pointer;transition:all .15s;
}
.filter button:hover{border-color:var(--primary);color:var(--primary)}
.filter button[aria-selected="true"]{background:var(--primary);border-color:var(--primary);color:#fff}
.searchbar{display:flex;justify-content:center;margin-bottom:28px}
.searchbar input{
  width:min(520px,100%);padding:13px 20px;border:1px solid var(--border);border-radius:999px;
  font-size:16px;font-family:var(--font);color:var(--text);background:#fff;
}
.searchbar input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(123,91,255,.14)}

/* ---------- FAQ 分栏（沿用既有方案：列独立、展开不影响他列） ---------- */
.faq-cols{display:grid;grid-template-columns:repeat(var(--cols,3),minmax(0,1fr));gap:22px;align-items:start}
.faq-col{display:flex;flex-direction:column;gap:26px;min-width:0}
.faq-group{display:flex;flex-direction:column;gap:12px}
.faq-group__title{
  display:flex;align-items:baseline;gap:6px;margin:0;padding-left:10px;
  border-left:3px solid var(--primary);font-size:14px;font-weight:800;color:var(--primary);line-height:1.4;
}
.faq-group__count{font-size:12px;font-weight:500;color:var(--muted)}
@media (max-width:1024px){.faq-cols{grid-template-columns:repeat(2,minmax(0,1fr))}.faq-col:nth-child(3){grid-column:1/-1}}
@media (max-width:720px){.faq-cols{grid-template-columns:1fr}.faq-col:nth-child(3){grid-column:auto}}

/* ---------- 列表 / 空态 / 提示 ---------- */
.list{border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;background:var(--surface)}
.list__row{display:flex;justify-content:space-between;gap:24px;padding:20px 24px;border-bottom:1px solid var(--border)}
.list__row:last-child{border-bottom:0}
.list__row:hover{background:var(--accent-soft)}
.list__row h3{margin:0 0 4px;font-size:16px;color:var(--deep)}
.list__row p{margin:0;font-size:14px;color:var(--muted)}
.list__meta{flex:none;font-size:12.5px;color:var(--muted);white-space:nowrap}
@media (max-width:640px){.list__row{flex-direction:column;gap:8px}}
.empty{padding:48px 24px;text-align:center;border:1px dashed var(--border);border-radius:var(--radius-md);background:var(--bg-soft)}
.empty__ico{font-size:30px;margin-bottom:12px}
.empty p{color:var(--muted);font-size:14.5px;margin-bottom:16px}
.toast{
  position:fixed;left:50%;bottom:26px;z-index:300;transform:translate(-50%,120%);
  padding:11px 20px;border-radius:999px;background:var(--deep);color:#fff;
  font-size:14px;box-shadow:var(--shadow-lg);opacity:0;pointer-events:none;transition:transform .3s,opacity .3s;
}
.toast.show{transform:translate(-50%,0);opacity:1}

/* ---------- 痛点 / 步骤 / 架构 ---------- */
.pain-list{display:grid;gap:18px}
.pain{
  display:flex;gap:18px;align-items:flex-start;background:var(--surface);
  border:1px solid var(--border);border-radius:var(--radius-md);padding:24px;box-shadow:var(--shadow-sm);
}
.pain__no{
  flex:none;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:var(--accent-soft);color:var(--primary);font-weight:800;font-size:15px;
}
.pain h3{margin:0 0 6px;font-size:16.5px}
.pain p{margin:0;font-size:14.5px;color:var(--muted)}
.pain__kpi{margin-left:auto;flex:none;text-align:right}
.pain__kpi b{display:block;font-size:22px;font-weight:800;color:var(--primary)}
.pain__kpi span{font-size:12px;color:var(--muted)}
@media (max-width:640px){.pain{flex-wrap:wrap}.pain__kpi{margin-left:0;text-align:left}}

.stack-flow{display:grid;gap:14px;max-width:820px;margin:0 auto}
.stack-layer{
  border:1px solid var(--border);border-radius:var(--radius-md);padding:18px 22px;background:var(--surface);
  box-shadow:var(--shadow-sm);text-align:center;
}
.stack-layer b{display:block;color:var(--deep);font-size:16px}
.stack-layer span{font-size:13.5px;color:var(--muted)}
.stack-layer--core{background:linear-gradient(120deg,#2b1b5e,#5b3fd4);border-color:transparent;color:#fff}
.stack-layer--core b{color:#fff}
.stack-layer--core span{color:var(--accent-light)}

/* ---------- 深色区内的卡片 ---------- */
.section--deep .card{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.16);box-shadow:none}
.section--deep .card h3{color:#fff}
.section--deep .card p{color:rgba(255,255,255,.82)}
.section--deep .card .card-ico{background:rgba(255,255,255,.12);color:#fff}

/* ---------- 左对齐区块标题（内页用） ---------- */
.section-head--left{text-align:left;margin-left:0}
.section-head--left h2{max-width:820px}
.section-head--left p{max-width:720px}

/* ---------- 导航当前项 ---------- */
.nav a.is-current{color:var(--deep);background:var(--accent-soft);font-weight:600}

/* ---------- 页面主区上边距（避开固定页头） ---------- */
main{padding-top:0}