/* ============================================================
   RoboWig 主站公共样式 v3.0（双站架构）
   设计 Token 与主站/商城共享：科技黑 #0A0A0A + 霓虹青 #00E5FF + 金属银 + 白
   ============================================================ */
:root {
  --bg: #0A0A0A;
  --bg2: #131316;
  --bg3: #18181D;
  --card: #18181D;
  --border: #26262E;
  --border-light: #33333D;
  --text: #F5F5F7;
  --text-2: #C9C9D4;
  --muted: #9CA3AF;
  --accent: #00E5FF;        /* 霓虹青（双站主强调色） */
  --accent-2: #8B5CF6;      /* 电光紫（辅助，避免大面积） */
  --accent-3: #EC4899;      /* 荧光粉（辅助点缀） */
  --green: #34D399;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --radius: 8px;
  --nav-height: 76px;
  --maxw: 1200px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg); color: var(--text);
  font-family: var(--font); line-height: 1.7; font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; transition: color .2s; }
a:hover { color: #7EF0FF; }
img { max-width: 100%; display: block; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

/* ============ 顶部公告条 ============ */
.announce {
  background: linear-gradient(90deg, rgba(0,229,255,.16), rgba(139,92,246,.16));
  border-bottom: 1px solid var(--border);
  text-align: center; padding: 9px 16px;
  font-size: 13px; font-weight: 600; letter-spacing: .02em; color: var(--text-2);
}
.announce a { color: var(--accent); font-weight: 700; }
.announce a:hover { color: #7EF0FF; }

/* ============ Header ============ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10,10,10,.78);
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid transparent;
  transition: all .3s;
}
.site-header.scrolled { background: rgba(10,10,10,.95); border-bottom-color: var(--border); }
.nav-inner {
  height: var(--nav-height); display: flex; align-items: center;
  justify-content: space-between; gap: 24px;
}
.logo { display: inline-flex; align-items: center; gap: 10px; }
.logo .logo-img { height: 44px; width: auto; }
.nav-links { display: flex; gap: 6px; list-style: none; }
.nav-links a {
  display: inline-block; padding: 9px 14px; border-radius: var(--radius);
  color: var(--text-2); font-size: 14.5px; font-weight: 600;
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,.06); }
.nav-links a.active { color: var(--accent); }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.lang-switch { display: flex; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; }
.lang-switch button {
  background: transparent; border: none; color: var(--muted);
  padding: 7px 14px; font-size: 13px; font-weight: 700; cursor: pointer;
  font-family: var(--font); transition: all .2s;
}
.lang-switch button.active { background: var(--accent); color: #062A33; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border-radius: var(--radius); padding: 12px 26px;
  font-size: 15px; font-weight: 700; cursor: pointer; border: 1px solid transparent;
  transition: all .25s; font-family: var(--font); line-height: 1.2;
}
.btn-primary { background: var(--accent); color: #062A33; }
.btn-primary:hover { background: #33EBFF; color: #062A33; transform: translateY(-2px); box-shadow: 0 10px 30px rgba(0,229,255,.3); }
.btn-outline { background: transparent; color: var(--text); border-color: var(--border-light); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--text-2); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--accent-2); color: var(--accent-2); }
.btn-sm { padding: 8px 16px; font-size: 13.5px; }

/* 汉堡菜单 */
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; }
.hamburger span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: all .3s; }
.mobile-menu {
  position: fixed; top: 0; right: 0; height: 100dvh; width: min(320px, 84vw);
  background: var(--bg2); border-left: 1px solid var(--border); z-index: 200;
  transform: translateX(100%); transition: transform .35s cubic-bezier(.25,.46,.45,.94);
  padding: 90px 28px 40px; display: flex; flex-direction: column; gap: 8px;
}
.mobile-menu.open { transform: translateX(0); box-shadow: -20px 0 60px rgba(0,0,0,.6); }
.mobile-menu a { color: var(--text-2); font-size: 17px; font-weight: 600; padding: 12px 8px; border-bottom: 1px solid var(--border); }
.mobile-menu a:hover { color: var(--accent); }
.menu-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.55); z-index: 190; opacity: 0; pointer-events: none; transition: opacity .3s; }
.menu-overlay.open { opacity: 1; pointer-events: auto; }

/* ============ 通用区块 ============ */
section { padding-block: 84px; }
.eyebrow { display: inline-block; font-size: 12.5px; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; color: var(--accent); margin-bottom: 14px; }
.page-title { font-size: clamp(34px, 5vw, 52px); font-weight: 900; letter-spacing: -.02em; line-height: 1.15; }
.page-sub { color: var(--muted); font-size: 17px; max-width: 720px; margin-top: 16px; }
.section-title { font-size: clamp(26px, 3.4vw, 38px); font-weight: 900; letter-spacing: -.015em; line-height: 1.2; }
.section-desc { color: var(--muted); margin-top: 12px; max-width: 640px; }
.grad { background: linear-gradient(135deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.center { text-align: center; }
.center .section-desc { margin-inline: auto; }
.hl { color: var(--accent); }

/* Hero（子页面） */
.page-hero { padding: 90px 0 70px; position: relative; overflow: hidden; }
.page-hero::before {
  content: ""; position: absolute; top: -140px; right: -120px; width: 480px; height: 480px;
  background: radial-gradient(circle, rgba(0,229,255,.14), transparent 60%); pointer-events: none;
}
.page-hero::after {
  content: ""; position: absolute; bottom: -160px; left: -120px; width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(139,92,246,.12), transparent 60%); pointer-events: none;
}
.page-hero .container { position: relative; z-index: 1; }
.crumbs { font-size: 13px; color: var(--muted); margin-bottom: 22px; }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--accent); }
.crumbs span { margin: 0 8px; opacity: .5; }

/* ============ 卡片网格 ============ */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  padding: 26px; transition: transform .3s, border-color .3s, box-shadow .3s;
}
.card:hover { transform: translateY(-6px); border-color: rgba(0,229,255,.4); box-shadow: 0 20px 50px rgba(0,0,0,.5); }
.card h3 { font-size: 18px; font-weight: 800; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 14.5px; }
.card .icon { font-size: 30px; margin-bottom: 14px; display: inline-block; }

/* ============ 表单 ============ */
.form-card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 32px; }
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group.full { grid-column: 1 / -1; }
.form-group label { font-size: 13px; font-weight: 700; color: var(--text-2); }
.form-group input, .form-group select, .form-group textarea {
  background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius);
  color: var(--text); padding: 12px 14px; font-size: 14.5px; font-family: var(--font);
  transition: border-color .2s; outline: none;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--accent); }
.form-group textarea { resize: vertical; min-height: 110px; }
.form-note { font-size: 12.5px; color: var(--muted); margin-top: 10px; }
.form-success {
  display: none; margin-top: 14px; padding: 14px 18px; border-radius: var(--radius);
  background: rgba(52,211,153,.1); border: 1px solid rgba(52,211,153,.4); color: var(--green);
  font-size: 14px; font-weight: 600;
}
.form-success.show { display: block; }

/* ============ FAQ ============ */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item { background: var(--card); border: 1px solid var(--border); border-radius: 12px; margin-bottom: 12px; overflow: hidden; }
.faq-question {
  width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 14px;
  background: none; border: none; color: var(--text); font-family: var(--font);
  font-size: 15.5px; font-weight: 700; padding: 20px 22px; cursor: pointer; text-align: left;
}
.faq-question .faq-icon { color: var(--accent); transition: transform .3s; flex-shrink: 0; }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-item.open .faq-answer { max-height: 500px; }
.faq-answer p { padding: 0 22px 20px; color: var(--muted); font-size: 14.5px; }

/* ============ 博客 ============ */
.blog-card { overflow: hidden; }
.blog-card .thumb { aspect-ratio: 16/9; background: var(--bg2); overflow: hidden; border-radius: 10px; margin-bottom: 16px; }
.blog-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.blog-card:hover .thumb img { transform: scale(1.06); }
.blog-meta { font-size: 12.5px; color: var(--muted); display: flex; gap: 12px; flex-wrap: wrap; margin: 10px 0 8px; }
.blog-cat { color: var(--accent); font-weight: 700; text-transform: uppercase; font-size: 11.5px; letter-spacing: .08em; }
.blog-title { font-size: 19px; font-weight: 800; line-height: 1.35; }
.blog-title a { color: var(--text); }
.blog-title a:hover { color: var(--accent); }
.blog-excerpt { color: var(--muted); font-size: 14px; margin-top: 8px; }

/* 文章正文 */
.article { max-width: 780px; margin: 0 auto; }
.article h1 { font-size: clamp(28px, 4vw, 40px); font-weight: 900; letter-spacing: -.015em; line-height: 1.25; }
.article .article-meta { display: flex; gap: 16px; color: var(--muted); font-size: 13.5px; margin: 18px 0 28px; flex-wrap: wrap; }
.article .article-hero { border-radius: 14px; overflow: hidden; margin-bottom: 32px; }
.article h2 { font-size: 26px; font-weight: 800; margin: 40px 0 16px; letter-spacing: -.01em; }
.article h3 { font-size: 20px; font-weight: 700; margin: 30px 0 12px; }
.article p { color: var(--text-2); margin-bottom: 18px; font-size: 16px; }
.article ul, .article ol { color: var(--text-2); margin: 0 0 20px 22px; }
.article li { margin-bottom: 8px; }
.article blockquote { border-left: 3px solid var(--accent); padding: 14px 20px; margin: 24px 0; background: var(--bg2); border-radius: 0 10px 10px 0; color: var(--text-2); font-style: italic; }
.article img { border-radius: 12px; margin: 24px 0; }
.article .product-embed {
  display: flex; align-items: center; gap: 18px; background: var(--bg2);
  border: 1px solid var(--border); border-radius: 14px; padding: 18px; margin: 28px 0;
}
.article .product-embed img { width: 84px; height: 84px; object-fit: cover; border-radius: 10px; margin: 0; }
.article .product-embed h4 { font-size: 16px; margin-bottom: 4px; }
.article .product-embed p { color: var(--muted); font-size: 13.5px; margin: 0; }

/* ============ 适配工具 ============ */
.fit-options { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.fit-option {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 22px 16px; text-align: center; cursor: pointer; transition: all .25s; color: var(--text);
  font-family: var(--font); font-size: 15px; font-weight: 700;
}
.fit-option:hover { border-color: var(--accent); transform: translateY(-3px); }
.fit-option.selected { background: rgba(0,229,255,.1); border-color: var(--accent); box-shadow: 0 0 24px rgba(0,229,255,.15); }
.fit-option small { display: block; color: var(--muted); font-weight: 400; font-size: 12.5px; margin-top: 4px; }
.fit-scene-options { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
.fit-scene {
  background: var(--bg2); border: 1px solid var(--border); border-radius: 10px;
  padding: 14px 10px; text-align: center; cursor: pointer; transition: all .2s;
  color: var(--text-2); font-family: var(--font); font-size: 13.5px; font-weight: 600;
}
.fit-scene:hover { border-color: var(--accent); }
.fit-scene.selected { background: rgba(0,229,255,.1); border-color: var(--accent); color: var(--accent); }
.fit-result-card {
  display: flex; gap: 20px; background: var(--bg2); border: 1px solid rgba(0,229,255,.3);
  border-radius: 14px; padding: 22px; margin-top: 18px; align-items: center;
}
.fit-result-card img { width: 72px; height: 90px; object-fit: cover; border-radius: 10px; }
.fit-badge { display: inline-block; padding: 3px 12px; border-radius: 999px; font-size: 12px; font-weight: 800; }
.fit-badge.ok { background: rgba(52,211,153,.15); color: var(--green); }
.fit-badge.warn { background: rgba(251,191,36,.15); color: var(--yellow, #FBBF24); }
.rating-badge { font-size: 12px; font-weight: 800; padding: 2px 9px; border-radius: 6px; margin-left: 6px; }
.rating-badge.a { background: rgba(52,211,153,.15); color: var(--green); }
.rating-badge.b { background: rgba(251,191,36,.15); color: #FBBF24; }
.rating-badge.c { background: rgba(248,113,113,.15); color: #F87171; }

/* ============ 政策/文本页 ============ */
.prose { max-width: 800px; }
.prose h2 { font-size: 24px; font-weight: 800; margin: 36px 0 14px; }
.prose h3 { font-size: 18px; font-weight: 700; margin: 26px 0 10px; color: var(--text-2); }
.prose p { color: var(--text-2); margin-bottom: 16px; }
.prose ul { color: var(--text-2); margin: 0 0 18px 22px; }
.prose li { margin-bottom: 8px; }
.prose table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 14.5px; }
.prose th, .prose td { padding: 10px 12px; border: 1px solid var(--border); text-align: left; }
.prose th { background: var(--bg2); color: var(--text-2); font-weight: 700; }
.prose strong { color: var(--text); }
.updated { color: var(--muted); font-size: 13px; margin-top: 30px; }

/* ============ Footer ============ */
.site-footer { background: var(--bg2); border-top: 1px solid var(--border); padding: 70px 0 30px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.3fr; gap: 40px; }
.footer-brand p { color: var(--muted); font-size: 14px; margin-top: 14px; }
.footer-address { color: var(--muted); font-size: 13.5px; font-style: normal; margin-top: 14px; line-height: 1.8; }
.footer-col h4 { font-size: 13px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; color: var(--text-2); margin-bottom: 18px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 11px; }
.footer-col a { color: var(--muted); font-size: 14px; }
.footer-col a:hover { color: var(--accent); }
.footer-newsletter { margin-top: 18px; }
.footer-newsletter form { display: flex; gap: 8px; margin-top: 12px; }
.footer-newsletter input {
  flex: 1; background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 11px 14px; color: var(--text); font-size: 14px; font-family: var(--font); outline: none;
}
.footer-newsletter input:focus { border-color: var(--accent); }
.footer-pay { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; }
.footer-pay span {
  font-size: 11px; font-weight: 700; color: var(--muted); border: 1px solid var(--border);
  padding: 4px 10px; border-radius: 5px; background: var(--bg);
}
.footer-bottom { border-top: 1px solid var(--border); margin-top: 44px; padding-top: 22px; display: flex; justify-content: space-between; align-items: center; gap: 14px; flex-wrap: wrap; color: var(--muted); font-size: 13px; }

/* ============ 响应式 ============ */
@media (max-width: 1100px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } .fit-options { grid-template-columns: repeat(2, 1fr); } .fit-scene-options { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 900px) { .grid-3 { grid-template-columns: repeat(2, 1fr); } .footer-grid { grid-template-columns: 1fr 1fr; } .form-grid { grid-template-columns: 1fr; } }
@media (max-width: 768px) {
  .nav-links, .nav-actions .btn, .nav-actions .lang-switch { display: none; }
  .hamburger { display: flex; }
  section { padding-block: 64px; }
  .page-hero { padding: 64px 0 48px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .fit-result-card { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 520px) { .grid-4 { grid-template-columns: 1fr; } .footer-grid { grid-template-columns: 1fr; } .fit-scene-options { grid-template-columns: repeat(2, 1fr); } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; } }