/* =========================================================
   达优客 dailyseo 官网样式
   风格：苹果液态玻璃（毛玻璃 backdrop-filter / 渐变 / 大留白 / 悬浮）
   ========================================================= */
:root {
  --bg: #f5f7fb;
  --bg-dark: #0b1020;
  --text: #1d2433;
  --text-light: #6b7280;
  --primary: #2563eb;
  --primary-grad: linear-gradient(135deg, #2563eb, #7c3aed);
  --glass: rgba(255,255,255,0.65);
  --glass-border: rgba(255,255,255,0.5);
  --radius: 20px;
  --shadow: 0 20px 60px rgba(15,23,42,0.10);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

/* ---------- 顶部导航（毛玻璃） ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,0.72);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(255,255,255,0.4);
}
.nav-inner { max-width: 1100px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; padding: 14px 24px; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 700; }
.brand-dot { width: 26px; height: 26px; border-radius: 8px; background: var(--primary-grad); box-shadow: 0 4px 14px rgba(37,99,235,0.4); }
.brand-name em { font-style: normal; font-size: 13px; color: var(--text-light); font-weight: 500; margin-left: 4px; }
.nav-links { display: flex; gap: 28px; }
.nav-links a { font-size: 15px; color: var(--text-light); transition: color .2s; }
.nav-links a:hover { color: var(--primary); }
.nav-cta {
  background: var(--primary-grad); color: #fff; padding: 9px 20px; border-radius: 999px;
  font-size: 14px; font-weight: 600; box-shadow: 0 6px 20px rgba(37,99,235,0.35); transition: transform .2s, box-shadow .2s;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 10px 26px rgba(37,99,235,0.45); }

/* ---------- Hero ---------- */
.hero { position: relative; padding: 150px 24px 100px; overflow: hidden; text-align: center; }
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(800px 400px at 20% 10%, rgba(37,99,235,0.15), transparent 60%),
    radial-gradient(700px 400px at 80% 20%, rgba(124,58,237,0.12), transparent 60%),
    radial-gradient(600px 500px at 50% 90%, rgba(14,165,233,0.10), transparent 60%),
    linear-gradient(180deg, #f8fafc, #eef2f9);
}
.hero-inner { position: relative; z-index: 1; max-width: 900px; margin: 0 auto; }
.hero-eyebrow {
  display: inline-block; font-size: 13px; font-weight: 600; color: var(--primary);
  background: rgba(37,99,235,0.08); border: 1px solid rgba(37,99,235,0.2);
  padding: 6px 16px; border-radius: 999px; margin-bottom: 24px;
}
.hero-title { font-size: 56px; font-weight: 800; letter-spacing: -1px; line-height: 1.15; margin-bottom: 20px; }
.hero-title .grad {
  background: var(--primary-grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-sub { font-size: 18px; color: var(--text-light); margin-bottom: 36px; }
.hero-actions { display: flex; gap: 14px; justify-content: center; margin-bottom: 64px; }
.btn {
  display: inline-block; padding: 13px 30px; border-radius: 999px; font-size: 15px; font-weight: 600;
  transition: transform .2s, box-shadow .2s;
}
.btn-primary { background: var(--primary-grad); color: #fff; box-shadow: 0 8px 24px rgba(37,99,235,0.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(37,99,235,0.45); }
.btn-ghost { background: rgba(255,255,255,0.6); border: 1px solid rgba(0,0,0,0.08); color: var(--text); backdrop-filter: blur(10px); }
.btn-ghost:hover { transform: translateY(-2px); box-shadow: var(--shadow); }

/* Hero 玻璃面板 */
.hero-glass {
  max-width: 780px; margin: 0 auto; border-radius: 24px; overflow: hidden;
  background: var(--glass); backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--glass-border);
  box-shadow: 0 30px 80px rgba(15,23,42,0.18);
  text-align: left;
}
.glass-bar { display: flex; align-items: center; gap: 6px; padding: 12px 16px; border-bottom: 1px solid rgba(255,255,255,0.5); }
.dot { width: 11px; height: 11px; border-radius: 50%; }
.dot.red { background: #ff5f57; } .dot.yellow { background: #febc2e; } .dot.green { background: #28c840; }
.glass-title { margin-left: 10px; font-size: 13px; color: var(--text-light); }
.glass-body { display: flex; padding: 0; min-height: 240px; }
.glass-sidebar { width: 170px; padding: 16px 10px; border-right: 1px solid rgba(255,255,255,0.5); }
.gs-item { padding: 9px 12px; border-radius: 10px; font-size: 13px; color: var(--text-light); margin-bottom: 4px; }
.gs-item.active { background: rgba(37,99,235,0.12); color: var(--primary); font-weight: 600; }
.glass-main { flex: 1; padding: 20px 24px; }
.gm-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 20px; }
.gm-stat { background: rgba(255,255,255,0.6); border-radius: 14px; padding: 14px; text-align: center; }
.gm-stat b { display: block; font-size: 22px; font-weight: 800; background: var(--primary-grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.gm-stat span { font-size: 12px; color: var(--text-light); }
.gm-chart { display: flex; align-items: flex-end; gap: 10px; height: 90px; padding: 0 6px; }
.gm-chart-bar { flex: 1; border-radius: 8px 8px 4px 4px; background: var(--primary-grad); opacity: 0.85; transition: height 1s ease; }

/* ---------- 信任条 ---------- */
.trust { border-top: 1px solid rgba(0,0,0,0.05); border-bottom: 1px solid rgba(0,0,0,0.05); background: #fff; }
.trust-inner { max-width: 1100px; margin: 0 auto; display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; padding: 16px 24px; }
.trust-inner span { font-size: 13px; color: var(--text-light); }
.trust-inner i { color: #d1d5db; font-style: normal; }

/* ---------- 通用 section ---------- */
.section { padding: 96px 24px; }
.section-dark { background: var(--bg-dark); color: #e5e7eb; }
.section-dark .section-title { color: #fff; }
.section-dark .section-sub { color: #9ca3af; }
.section-dark .section-eyebrow { color: #93c5fd; background: rgba(147,197,253,0.1); border-color: rgba(147,197,253,0.25); }
.section-inner { max-width: 1100px; margin: 0 auto; }
.section-eyebrow {
  display: inline-block; font-size: 13px; font-weight: 700; color: var(--primary);
  background: rgba(37,99,235,0.08); border: 1px solid rgba(37,99,235,0.2);
  padding: 5px 14px; border-radius: 999px; margin-bottom: 18px; text-transform: uppercase; letter-spacing: 1px;
}
.section-title { font-size: 38px; font-weight: 800; letter-spacing: -0.5px; margin-bottom: 14px; }
.section-sub { font-size: 17px; color: var(--text-light); margin-bottom: 48px; }

/* ---------- 功能卡片 ---------- */
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feat-card {
  background: var(--glass); border: 1px solid var(--glass-border);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-radius: var(--radius); padding: 28px; box-shadow: 0 4px 20px rgba(15,23,42,0.04);
  transition: transform .25s, box-shadow .25s;
}
.feat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.feat-icon { font-size: 32px; margin-bottom: 14px; }
.feat-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.feat-card p { font-size: 14px; color: var(--text-light); }

/* ---------- 节省成本 ---------- */
.save-grid { display: flex; align-items: stretch; justify-content: center; gap: 24px; flex-wrap: wrap; margin-bottom: 24px; }
.save-card {
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius); padding: 32px; width: 380px; backdrop-filter: blur(12px);
}
.save-card h3 { font-size: 18px; margin-bottom: 16px; color: #f9fafb; }
.save-list { list-style: none; }
.save-list li { font-size: 14px; color: #cbd5e1; padding: 8px 0; border-bottom: 1px dashed rgba(255,255,255,0.1); }
.save-list b { float: right; font-weight: 700; color: #f87171; }
.save-card-highlight .save-list b { color: #34d399; }
.save-total { margin-top: 18px; font-size: 15px; color: #f87171; font-weight: 600; }
.save-total-green { color: #34d399; }
.save-arrow { display: flex; align-items: center; font-size: 40px; color: #60a5fa; }
.save-note { text-align: center; font-size: 13px; color: #9ca3af; }

/* ---------- 套餐 ---------- */
.price-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.price-card { position: relative; border-radius: var(--radius); padding: 30px 24px; background: var(--glass); border: 1px solid var(--glass-border); backdrop-filter: blur(16px); }
.price-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; }
.price { font-size: 30px; font-weight: 800; color: var(--primary); }
.price small { font-size: 13px; color: var(--text-light); font-weight: 500; margin-left: 4px; }
.price-note { font-size: 13px; color: var(--text-light); margin: 2px 0 16px; }
.price-list { list-style: none; margin-bottom: 22px; }
.price-list li { font-size: 13px; color: var(--text); padding: 5px 0; position: relative; padding-left: 20px; }
.price-list li::before { content: "✓"; position: absolute; left: 0; color: var(--primary); font-weight: 700; }
.price-hot { border: 2px solid var(--primary); box-shadow: 0 20px 50px rgba(37,99,235,0.2); }
.hot-tag {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--primary-grad); color: #fff; font-size: 12px; font-weight: 700;
  padding: 4px 14px; border-radius: 999px; white-space: nowrap;
}
.btn-full { display: block; text-align: center; }
.price-foot { text-align: center; font-size: 13px; color: var(--text-light); margin-top: 28px; }
.price-foot a { color: var(--primary); }

/* ---------- 联系 ---------- */
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-bottom: 32px; }
.contact-card { text-align: center; padding: 30px 20px; }
.contact-icon { font-size: 30px; margin-bottom: 10px; }
.contact-card h3 { font-size: 16px; margin-bottom: 6px; }
.contact-big { font-size: 20px; font-weight: 800; color: #fff; }
.contact-card p { font-size: 13px; color: #9ca3af; }
.contact-form { max-width: 640px; margin: 0 auto; padding: 32px; text-align: center; }
.contact-form h3 { font-size: 18px; margin-bottom: 20px; }
.cf-row { display: flex; gap: 12px; margin-bottom: 12px; }
.cf-row input, .contact-form textarea {
  width: 100%; padding: 12px 16px; border-radius: 12px; border: 1px solid rgba(0,0,0,0.1);
  background: rgba(255,255,255,0.8); font-size: 14px; outline: none; font-family: inherit;
}
.contact-form textarea { resize: vertical; margin-bottom: 14px; }
.cf-note { font-size: 12px; color: #9ca3af; margin-top: 12px; }

/* ---------- 页脚 ---------- */
.footer { border-top: 1px solid rgba(0,0,0,0.06); background: #fff; }
.footer-inner { max-width: 1100px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; padding: 36px 24px; }
.footer-brand p { font-size: 13px; color: var(--text-light); margin-top: 4px; }
.footer-links { display: flex; gap: 20px; }
.footer-links a { font-size: 14px; color: var(--text-light); }
.footer-links a:hover { color: var(--primary); }
.footer-copy { text-align: right; }
.footer-copy p { font-size: 12px; color: var(--text-light); }
.footer-company { font-size: 11px; color: #9ca3af; }

/* ---------- 博客页 ---------- */
.blog-hero { padding: 140px 24px 60px; text-align: center; }
.blog-list { max-width: 780px; margin: 0 auto; padding: 0 24px 80px; }
.blog-item {
  display: block; background: var(--glass); border: 1px solid var(--glass-border);
  border-radius: var(--radius); padding: 28px; margin-bottom: 20px;
  backdrop-filter: blur(16px); transition: transform .25s, box-shadow .25s;
}
.blog-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.blog-item h3 { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.blog-item p { font-size: 14px; color: var(--text-light); margin-bottom: 12px; }
.blog-meta { font-size: 12px; color: #9ca3af; }
.blog-article { max-width: 760px; margin: 0 auto; padding: 130px 24px 80px; }
.blog-article h1 { font-size: 34px; font-weight: 800; margin-bottom: 8px; }
.blog-article .blog-meta { margin-bottom: 28px; }
.blog-article h2 { font-size: 24px; font-weight: 700; margin: 32px 0 14px; }
.blog-article p { font-size: 16px; color: #374151; margin-bottom: 16px; }
.blog-article ul, .blog-article ol { margin: 0 0 16px 22px; font-size: 16px; color: #374151; }
.blog-article li { margin-bottom: 6px; }
.blog-article .back { display: inline-block; margin-bottom: 28px; color: var(--primary); font-size: 14px; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .feat-grid { grid-template-columns: repeat(2, 1fr); }
  .price-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 40px; }
  .glass-sidebar { display: none; }
  .nav-links { display: none; }
}
@media (max-width: 600px) {
  .feat-grid, .price-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 120px; }
  .hero-title { font-size: 32px; }
  .cf-row { flex-direction: column; }
}

/* 文章内表格 / 引用 / CTA（专题页与技术对比表用） */
.blog-article .table-wrap { overflow-x: auto; margin: 18px 0; }
.blog-article table { width: 100%; border-collapse: collapse; font-size: 14.5px; table-layout: fixed; }
.blog-article th, .blog-article td { border: 1px solid #e5e7eb; padding: 9px 12px; text-align: left; vertical-align: top; overflow-wrap: anywhere; word-break: break-word; }
.blog-article th { background: #f3f4f6; font-weight: 700; color: #111827; }
.blog-article tbody tr:nth-child(even) td { background: #fafafa; }
.blog-article blockquote { margin: 18px 0; padding: 12px 16px; background: #f9fafb; border-left: 3px solid #93c5fd; color: #374151; font-size: 15px; }
.blog-article hr { border: 0; border-top: 1px dashed #e5e7eb; margin: 26px 0; }
.blog-article a { color: #2563eb; }
.blog-article code { background: #f3f4f6; padding: 1px 5px; border-radius: 4px; font-size: 14px; }
.blog-article .back { display: inline-block; font-size: 13px; color: #6b7280; margin-bottom: 14px; text-decoration: none; }
.blog-article .cta-box { margin: 34px 0 10px; padding: 22px 24px; border-radius: 16px; background: linear-gradient(135deg, rgba(37,99,235,.08), rgba(124,58,237,.08)); border: 1px solid rgba(37,99,235,.18); }
.blog-article .cta-box h3 { font-size: 20px; margin-bottom: 10px; }
.blog-article .cta-box p { font-size: 15px; }
.blog-article .cta-actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 14px 0 6px; }
.blog-article .cta-note { font-size: 13px !important; color: #6b7280; }
.blog-article .related { margin-top: 26px; padding-top: 16px; border-top: 1px solid #e5e7eb; font-size: 14px; }
.blog-article .related b { display: block; margin-bottom: 8px; color: #111827; }
.blog-article .related a { display: block; margin-bottom: 6px; }
@media (max-width: 700px) { .blog-article table { font-size: 13px; } .blog-article th, .blog-article td { padding: 7px 8px; } }

/* ---- 帮助中心 / 专题指南 列表 ---- */
.help-hero { padding: 130px 24px 10px; background: linear-gradient(180deg, rgba(37,99,235,.06), transparent); }
.help-sub { color: #6b7280; font-size: 16px; margin-top: 8px; }
.guide-list { display: grid; gap: 14px; }
.guide-card { display: flex; align-items: flex-start; gap: 14px; padding: 18px 20px; border: 1px solid #e5e7eb; border-radius: 14px; background: #fff; text-decoration: none; transition: transform .15s, box-shadow .15s, border-color .15s; }
.guide-card:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(15,23,42,.08); border-color: #bfdbfe; }
.guide-icon { flex: 0 0 40px; width: 40px; height: 40px; border-radius: 10px; background: #eff6ff; display: flex; align-items: center; justify-content: center; font-size: 20px; }
.guide-main { flex: 1; min-width: 0; }
.guide-title { font-weight: 700; color: #111827; font-size: 16px; margin-bottom: 4px; }
.guide-desc { color: #6b7280; font-size: 13.5px; line-height: 1.75; }
.guide-tag { flex: 0 0 auto; align-self: center; font-size: 12px; color: #2563eb; background: #eff6ff; border: 1px solid #bfdbfe; border-radius: 999px; padding: 2px 10px; }
/* ---- 文章内元素（补漏） ---- */
.blog-article .lead { font-size: 16.5px; color: #374151; background: #f8fafc; border-left: 3px solid #93c5fd; padding: 10px 14px; border-radius: 0 8px 8px 0; margin: 6px 0 22px; }
.blog-article pre.code { background: #f8fafc; border: 1px solid #e5e7eb; border-radius: 10px; padding: 12px 14px; overflow-x: auto; white-space: pre-wrap; word-break: break-word; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 13px; line-height: 1.95; color: #1f2937; margin: 14px 0; }
.blog-article blockquote p { margin: 0 0 10px; }
.blog-article blockquote p:last-child { margin-bottom: 0; }
/* 关键：文章内链接默认蓝色，会把按钮文字也染蓝（用户反馈"看不清"）→ 按钮内文字保持白色/品牌色 */
.blog-article .btn, .blog-article .btn:hover, .blog-article .btn:visited { text-decoration: none; }
.blog-article .btn-primary, .blog-article .btn-primary:hover { color: #fff !important; }
.blog-article .btn-ghost, .blog-article .btn-ghost:hover { color: #2563eb !important; }
@media (max-width: 700px) { .help-hero { padding-top: 110px; } .guide-card { flex-wrap: wrap; } .guide-tag { align-self: flex-start; } }