/* ============================================================
   Obsidian 综合站 · 视觉系统（复刻 community.obsidian.md）
   浅色 + 紫色品牌（Obsidian Violet）
   ============================================================ */
:root{
  --bg:#ffffff;
  --bg-soft:#f6f7f9;
  --surface:#ffffff;
  --surface-2:#f1f2f5;
  --border:rgba(17,24,39,.10);
  --border-strong:rgba(124,92,252,.45);
  --text:#1c1f26;
  --muted:#5b6270;
  --accent:#7c5cfc;        /* Obsidian Violet */
  --accent-2:#9b7bff;
  --accent-soft:rgba(124,92,252,.10);
  --accent-deep:#5b3df0;
  --radius:14px;
  --shadow:0 1px 2px rgba(17,24,39,.06), 0 8px 24px rgba(17,24,39,.06);
  --shadow-lg:0 10px 30px rgba(124,92,252,.14);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  line-height:1.65;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.muted{color:var(--muted)}
.accent{color:var(--accent)}

/* 顶部导航 */
.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(10px);
  background:rgba(255,255,255,.82);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;letter-spacing:.2px}
.brand .logo{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--accent),var(--accent-2));
  display:grid;place-items:center;color:#fff;font-weight:900;font-size:16px}
.nav-links{display:flex;gap:4px;align-items:center}
.nav-links a{padding:8px 14px;border-radius:10px;color:var(--muted);font-size:14.5px;font-weight:600;transition:.18s}
.nav-links a:hover{color:var(--text);background:var(--surface-2)}
.nav-links a.active{color:var(--accent);background:var(--accent-soft)}
.nav-links a.nav-cta{padding:9px 16px;border-radius:10px;background:var(--accent);color:#fff;font-weight:800;font-size:14px;text-decoration:none;display:inline-block;box-shadow:0 4px 14px rgba(124,92,252,.35)}
.nav-links a.nav-cta:hover{background:var(--accent-deep);color:#fff;box-shadow:0 6px 18px rgba(124,92,252,.45)}
.nav-toggle{display:none;background:none;border:1px solid var(--border);color:var(--text);
  border-radius:10px;padding:8px 12px;font-size:18px;cursor:pointer}
@media(max-width:860px){
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;flex-direction:column;
    background:var(--bg-soft);border-bottom:1px solid var(--border);padding:10px}
  .nav-links.open{display:flex}
  .nav-toggle{display:block}
}

/* 通用区块 */
.section{padding:64px 0}
.section-sm{padding:40px 0}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.6px;color:var(--accent);
  background:var(--accent-soft);padding:5px 12px;border-radius:999px;margin-bottom:14px}
.h2{font-size:32px;font-weight:800;margin:0 0 10px;letter-spacing:.3px}
.lead{color:var(--muted);font-size:16px;max-width:720px}

/* 卡片 */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:22px;transition:.2s;box-shadow:var(--shadow)}
.card:hover{border-color:var(--border-strong);transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.card h3{margin:0 0 8px;font-size:18px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:12px;
  font-weight:700;font-size:15px;cursor:pointer;border:1px solid transparent;transition:.18s}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-deep)}
.btn-ghost{background:transparent;border-color:var(--border);color:var(--text)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}

/* Hero */
.hero{position:relative;overflow:hidden;padding:90px 0 70px;
  background:linear-gradient(180deg,#faf8ff 0%,#ffffff 70%)}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(820px 420px at 82% -8%,rgba(124,92,252,.14),transparent 60%),
             radial-gradient(640px 360px at 8% 18%,rgba(155,123,255,.10),transparent 55%)}
.hero-grid{position:relative;display:grid;grid-template-columns:1.1fr 0.9fr;gap:48px;align-items:center}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr}}
.hero h1{font-size:46px;line-height:1.12;font-weight:900;margin:0 0 18px;letter-spacing:.2px}
.hero p{color:var(--muted);font-size:17.5px;margin:0 0 26px;line-height:1.7}
.stat-row{display:flex;gap:26px;flex-wrap:wrap;margin-top:30px}
.stat .n{font-size:30px;font-weight:900;color:var(--accent)}
.stat .l{font-size:13.5px;color:var(--muted)}
.hero-card{background:#fff;border:1px solid var(--border-strong);border-radius:22px;padding:26px;box-shadow:var(--shadow-lg)}
.hero-card .pill{display:inline-block;font-size:12px;font-weight:700;color:var(--accent);
  background:var(--accent-soft);padding:4px 10px;border-radius:999px;margin-bottom:12px}

/* 网格 */
.grid{display:grid;gap:18px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:980px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}

/* 特性列表 */
.feat{display:flex;gap:14px;align-items:flex-start}
.feat .ico{width:42px;height:42px;flex:0 0 42px;border-radius:12px;background:var(--accent-soft);
  color:var(--accent);display:grid;place-items:center;font-size:20px}
.feat h4{margin:0 0 4px;font-size:16px}
.feat p{margin:0;color:var(--muted);font-size:14.5px}

/* 价格表 */
.price{position:relative}
.price .old{color:var(--muted);text-decoration:line-through;font-weight:600;margin-left:8px;font-size:14px}
.tag-hot{position:absolute;top:-10px;right:16px;background:var(--accent);color:#fff;
  font-size:12px;font-weight:800;padding:4px 10px;border-radius:999px}

/* 支付弹窗 */
.pay-overlay{position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:9999;display:grid;place-items:center;padding:20px}
.pay-box{background:var(--bg);border-radius:20px;padding:32px;max-width:520px;width:100%;position:relative;box-shadow:var(--shadow-lg)}
.pay-close{position:absolute;top:16px;right:16px;background:none;border:none;font-size:20px;cursor:pointer;color:var(--muted);width:32px;height:32px;display:grid;place-items:center;border-radius:8px}
.pay-close:hover{background:var(--surface-2);color:var(--text)}
.step{display:flex;align-items:center;gap:8px;font-size:13.5px}
.step b{background:var(--accent);color:#fff;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;font-size:13px;flex-shrink:0}
.pay-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}

/* 搜索/筛选 */
.toolbar{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-bottom:22px}
.input{flex:1;min-width:220px;background:#fff;border:1px solid var(--border);
  color:var(--text);padding:12px 14px;border-radius:12px;font-size:15px;outline:none}
.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{padding:8px 13px;border-radius:999px;border:1px solid var(--border);background:#fff;
  color:var(--muted);font-size:13.5px;font-weight:600;cursor:pointer;transition:.16s}
.chip:hover{color:var(--text);border-color:var(--accent)}
.chip.active{background:var(--accent);color:#fff;border-color:var(--accent)}

/* 插件/模板/教程 条目 */
.item{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:16px 18px;
  transition:.16s;cursor:pointer}
.item:hover{border-color:var(--border-strong);box-shadow:var(--shadow)}
.item .name{font-weight:700;font-size:15.5px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.item .desc{color:var(--muted);font-size:13.5px;margin-top:6px}
.badge{font-size:11px;font-weight:700;padding:2px 8px;border-radius:999px;background:var(--accent-soft);color:var(--accent)}
.badge-grey{background:var(--surface-2);color:var(--muted)}
.badge-free{background:rgba(16,185,129,.12);color:#0f9d6b}

/* 教程卡片（专栏） */
.tut{display:flex;flex-direction:column;gap:10px}
.tut .meta{display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-size:12.5px;color:var(--muted)}
.tut .title{font-size:17px;font-weight:800;line-height:1.4}
.tut .excerpt{color:var(--muted);font-size:14px;flex:1}
.tut .read{font-weight:700;color:var(--accent);font-size:14px}

/* 详情抽屉 */
.drawer-mask{position:fixed;inset:0;background:rgba(17,24,39,.45);backdrop-filter:blur(2px);
  display:none;z-index:80}
.drawer-mask.open{display:block}
.drawer{position:fixed;top:0;right:0;height:100%;width:min(460px,92vw);background:#fff;
  border-left:1px solid var(--border);padding:26px;overflow:auto;transform:translateX(100%);
  transition:.25s;z-index:81}
.drawer.open{transform:translateX(0)}
.drawer h3{margin:0 0 6px;font-size:20px}
.drawer .close{position:absolute;top:18px;right:20px;background:none;border:none;color:var(--muted);
  font-size:24px;cursor:pointer}

/* 页脚 */
.footer{border-top:1px solid var(--border);padding:46px 0 30px;margin-top:40px;background:var(--bg-soft)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:26px}
@media(max-width:860px){.footer-grid{grid-template-columns:1fr 1fr}}
.footer h5{font-size:14px;margin:0 0 12px;color:var(--text)}
.footer a{display:block;color:var(--muted);font-size:14px;padding:4px 0}
.footer a:hover{color:var(--accent)}
.footer .copy{margin-top:30px;color:var(--muted);font-size:13px;border-top:1px solid var(--border);padding-top:18px}

/* 杂项 */
.kbd{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--surface-2);
  border:1px solid var(--border);border-radius:6px;padding:1px 7px;font-size:12.5px;color:var(--text)}
.divider{height:1px;background:var(--border);margin:0}
.callout{border-left:3px solid var(--accent);background:var(--accent-soft);padding:12px 16px;border-radius:0 10px 10px 0;color:var(--text);font-size:14.5px}
.fade-in{animation:fade .5s ease both}
@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.pill-row{display:flex;gap:6px;flex-wrap:wrap}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:var(--surface-2);border-radius:10px}
::-webkit-scrollbar-thumb:hover{background:#d8dae0}

/* GEO 问答对（FAQ 折叠） */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:860px;margin:0 auto}
.faq-item{background:var(--bg);border:1px solid var(--border);border-radius:14px;padding:0;overflow:hidden;transition:.18s}
.faq-item[open]{border-color:var(--accent);box-shadow:0 6px 22px rgba(109,74,255,.10)}
.faq-item summary{cursor:pointer;list-style:none;padding:16px 20px;font-weight:700;font-size:16px;color:var(--text);display:flex;align-items:center;justify-content:space-between;gap:12px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'+';font-size:22px;font-weight:400;color:var(--accent);flex-shrink:0;transition:.18s}
.faq-item[open] summary::after{content:'−';transform:rotate(180deg)}
.faq-a{padding:0 20px 18px;color:var(--muted);font-size:15px;line-height:1.8}

/* V6 指南独立横幅 */
.v6-banner{display:flex;align-items:center;gap:28px;
  background:
    radial-gradient(140% 120% at 100% 0%, rgba(255,255,255,.18) 0%, rgba(255,255,255,0) 42%),
    linear-gradient(135deg,#6d4aff 0%,#8b5cf6 48%,#a855f7 100%);
  border:1px solid rgba(255,255,255,.28);
  border-radius:22px;padding:32px 38px;color:#fff;text-decoration:none;
  box-shadow:0 16px 48px rgba(109,74,255,.30), inset 0 1px 0 rgba(255,255,255,.22);
  transition:transform .2s,box-shadow .2s,border-color .2s;
  position:relative;overflow:hidden}
.v6-banner::before{content:"";position:absolute;width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.20),transparent 70%);
  top:-90px;right:60px;pointer-events:none}
.v6-banner::after{content:"";position:absolute;width:160px;height:160px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.12),transparent 70%);
  bottom:-70px;left:30px;pointer-events:none}
.v6-banner:hover{transform:translateY(-4px);border-color:rgba(255,255,255,.5);
  box-shadow:0 24px 64px rgba(109,74,255,.42), inset 0 1px 0 rgba(255,255,255,.3)}
.v6-banner-text{flex:1;min-width:0;position:relative;z-index:1}
.v6-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.20);
  border:1px solid rgba(255,255,255,.30);padding:5px 13px;border-radius:20px;
  font-size:12px;font-weight:700;margin-bottom:12px;letter-spacing:.5px;backdrop-filter:blur(4px)}
.v6-banner h2{font-size:25px;font-weight:900;margin:0 0 10px;color:#fff;line-height:1.3;
  text-shadow:0 2px 12px rgba(0,0,0,.18)}
.v6-banner p{font-size:15px;line-height:1.75;color:rgba(255,255,255,.92);margin:0 0 18px;max-width:580px}
.v6-cta{display:inline-flex;align-items:center;gap:6px;background:#fff;color:#6d4aff;font-weight:800;
  padding:11px 22px;border-radius:12px;font-size:15px;transition:.18s;
  box-shadow:0 6px 16px rgba(0,0,0,.18)}
.v6-banner:hover .v6-cta{background:#f3f0ff;transform:translateX(3px)}
.v6-banner-art{font-size:78px;flex-shrink:0;filter:drop-shadow(0 8px 18px rgba(0,0,0,.25));line-height:1;
  position:relative;z-index:1}
@media(max-width:680px){.v6-banner{flex-direction:column;text-align:center;padding:28px 22px}.v6-banner-art{font-size:60px;order:-1}}