/* ============ 基础与变量 ============ */
:root {
  --bg: #060c09;
  --bg-alt: #0a120d;
  --card: #0d1712;
  --card-border: rgba(74, 222, 128, 0.14);
  --text: #e6f7ec;
  --text-dim: #8aa899;
  --primary: #2be27a;
  --primary-dark: #17b866;
  --cyan: #3cf0b5;
  --green: #4ade80;
  --yellow: #fbbf24;
  --red: #f87171;
  --gradient: linear-gradient(135deg, #2be27a, #3cf0b5);
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ============ 头部导航 ============ */
.site-header {
  background: rgba(6, 12, 9, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--card-border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo {
  background: var(--gradient);
  color: #fff;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 8px;
  font-size: 15px;
}
.brand-name { font-size: 17px; font-weight: 700; }
.main-nav { display: flex; gap: 6px; }
.main-nav a {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-dim);
  transition: all 0.2s;
}
.main-nav a:hover { color: var(--text); background: rgba(148, 163, 184, 0.1); }
.main-nav a.active { color: #fff; background: var(--gradient); }

/* ============ Hero ============ */
.hero {
  background:
    radial-gradient(800px 400px at 20% 0%, rgba(43, 226, 122, 0.2), transparent 60%),
    radial-gradient(600px 300px at 85% 20%, rgba(60, 240, 181, 0.16), transparent 60%),
    var(--bg);
  padding: 90px 0 70px;
  text-align: center;
}
.hero-badge {
  display: inline-block;
  border: 1px solid rgba(43, 226, 122, 0.5);
  color: var(--cyan);
  font-size: 13px;
  padding: 5px 16px;
  border-radius: 999px;
  margin-bottom: 22px;
}
.hero h1 { font-size: 42px; font-weight: 800; line-height: 1.35; margin-bottom: 18px; }
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub { color: var(--text-dim); font-size: 17px; max-width: 640px; margin: 0 auto 34px; }
.hero-actions { display: flex; gap: 14px; justify-content: center; margin-bottom: 56px; }
.hero-stats { display: flex; justify-content: center; gap: 60px; }
.stat-item strong { display: block; font-size: 30px; font-weight: 800; color: #fff; }
.stat-item span { color: var(--text-dim); font-size: 14px; }

/* ============ 按钮 ============ */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-block { display: block; width: 100%; text-align: center; }
.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 6px 20px rgba(43, 226, 122, 0.4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(43, 226, 122, 0.45); }
.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--card-border);
}
.btn-ghost:hover { border-color: var(--primary); color: #fff; }
.btn-lg { padding: 15px 42px; font-size: 16px; }
.btn-block { width: 100%; }

/* ============ 区块 ============ */
.section { padding: 70px 0; }
.section-alt { background: var(--bg-alt); }
.section-title { font-size: 30px; font-weight: 800; text-align: center; margin-bottom: 8px; }
.section-desc { text-align: center; color: var(--text-dim); margin-bottom: 44px; }

/* ============ 卡片 ============ */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.tool-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: all 0.25s;
}
.tool-card:hover {
  transform: translateY(-6px);
  border-color: rgba(43, 226, 122, 0.5);
  box-shadow: var(--shadow);
}
.tool-icon { font-size: 34px; margin-bottom: 16px; }
.tool-card h3 { font-size: 19px; margin-bottom: 10px; }
.tool-card p { color: var(--text-dim); font-size: 14px; margin-bottom: 18px; }
.tool-link { color: var(--cyan); font-size: 14px; font-weight: 600; }

/* ============ 特性 & 流程 ============ */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feature-item {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 28px 24px;
}
.feature-item h3 { font-size: 17px; margin-bottom: 10px; color: var(--cyan); }
.feature-item p { color: var(--text-dim); font-size: 14px; }

.flow-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.flow-item { text-align: center; padding: 26px 16px; background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius); }
.flow-num {
  display: inline-block;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  background: var(--gradient);
  width: 34px;
  height: 34px;
  line-height: 34px;
  border-radius: 50%;
  margin-bottom: 14px;
}
.flow-item h3 { font-size: 16px; margin-bottom: 6px; }
.flow-item p { color: var(--text-dim); font-size: 13px; }

/* ============ CTA & 页脚 ============ */
.cta {
  background: var(--gradient);
  text-align: center;
  padding: 64px 0;
  color: #fff;
}
.cta h2 { font-size: 28px; margin-bottom: 8px; }
.cta p { opacity: 0.9; margin-bottom: 26px; }
.cta .btn-primary { background: #fff; color: var(--primary-dark); box-shadow: none; }
.cta .btn-primary:hover { background: #f1f5f9; }

.site-footer {
  border-top: 1px solid var(--card-border);
  padding: 26px 0;
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
}
.footer-tip { margin-top: 4px; opacity: 0.7; }

/* ============ 工具页通用 ============ */
.page-hero {
  background: radial-gradient(700px 300px at 50% -10%, rgba(43, 226, 122, 0.22), transparent 65%);
  padding: 56px 0 40px;
  text-align: center;
}
.page-hero h1 { font-size: 34px; font-weight: 800; margin-bottom: 8px; }
.page-hero p { color: var(--text-dim); }

.tool-box {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 30px;
  margin-bottom: 30px;
}
.input-group { display: flex; gap: 12px; }
.input-group .input + .input { margin-left: 0; }
.input {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 13px 16px;
  color: var(--text);
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
}
.input:focus { border-color: var(--primary); }
.form-tip { margin-top: 12px; font-size: 12px; color: var(--text-dim); }

/* ============ 加载 ============ */
.loading { text-align: center; padding: 50px 0; color: var(--text-dim); }
.spinner {
  width: 42px;
  height: 42px;
  margin: 0 auto 16px;
  border: 3px solid rgba(43, 226, 122, 0.22);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.hidden { display: none; }

/* ============ 结果区 ============ */
.result {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 32px;
}
.result-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 26px; flex-wrap: wrap; gap: 16px; }
.result-head h2 { font-size: 22px; }
.kw-desc { color: var(--text-dim); font-size: 14px; margin-top: 6px; }

.score-ring {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: conic-gradient(var(--primary) calc(var(--p, 0) * 1%), rgba(148, 163, 184, 0.15) 0);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}
.score-ring::before {
  content: "";
  position: absolute;
  inset: 9px;
  background: var(--card);
  border-radius: 50%;
}
.score-num { position: relative; font-size: 34px; font-weight: 800; color: #fff; }
.score-label { position: relative; font-size: 12px; color: var(--text-dim); }

.report-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.report-item {
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 18px 20px;
}
.report-item .item-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.report-item h4 { font-size: 14px; color: var(--text-dim); font-weight: 500; }
.badge { font-size: 12px; padding: 3px 10px; border-radius: 999px; font-weight: 600; }
.badge.good { background: rgba(52, 211, 153, 0.15); color: var(--green); }
.badge.warn { background: rgba(251, 191, 36, 0.15); color: var(--yellow); }
.badge.bad { background: rgba(248, 113, 113, 0.15); color: var(--red); }
.report-item .item-value { font-size: 15px; margin-bottom: 6px; }
.report-item .item-desc { font-size: 13px; color: var(--text-dim); }

/* ============ 图表卡片 ============ */
.chart-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.chart-card {
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
}
.chart-card h3 { font-size: 15px; margin-bottom: 14px; }
.chart-card.full { margin-bottom: 0; }
.bar-wrap { padding-top: 6px; }
.bar-label { display: flex; justify-content: space-between; font-size: 12px; color: var(--text-dim); margin-bottom: 8px; }
.bar-track { height: 12px; background: rgba(148, 163, 184, 0.12); border-radius: 999px; overflow: hidden; }
.bar-fill { height: 100%; width: 0; border-radius: 999px; transition: width 1s ease; }
.bar-fill.heat { background: linear-gradient(90deg, #fbbf24, #f87171); }
.bar-fill.comp { background: linear-gradient(90deg, #34d399, #fbbf24, #f87171); }
.bar-value { margin-top: 8px; font-size: 14px; color: var(--text); font-weight: 600; }

.advice-list { list-style: none; }
.advice-list li {
  padding: 10px 0;
  border-bottom: 1px dashed var(--card-border);
  font-size: 14px;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.advice-list li:last-child { border-bottom: none; }
.advice-list .dot { color: var(--cyan); flex-shrink: 0; }

.tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
.tag-cloud span {
  background: rgba(43, 226, 122, 0.12);
  border: 1px solid rgba(43, 226, 122, 0.35);
  color: var(--cyan);
  font-size: 13px;
  padding: 6px 14px;
  border-radius: 999px;
}

/* ============ 批量关键词 ============ */
.input-area {
  width: 100%;
  resize: vertical;
  font-family: inherit;
  min-height: 130px;
  line-height: 1.6;
}
.btn-row { display: flex; gap: 12px; margin-top: 16px; }

.overview-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 16px; }
.overview-card {
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 20px;
  background: rgba(43, 226, 122, 0.07);
}
.ov-label { font-size: 12px; color: var(--text-dim); margin-bottom: 8px; }
.ov-value { font-size: 18px; font-weight: 700; color: #fff; word-break: break-all; }
.ov-extra { font-size: 12px; color: var(--text-dim); margin-top: 6px; }

.table-wrap { overflow-x: auto; }
.kw-table { width: 100%; border-collapse: collapse; min-width: 560px; }
.kw-table th, .kw-table td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--card-border); font-size: 14px; }
.kw-table th { color: var(--text-dim); font-weight: 500; font-size: 13px; }
.kw-table tr:hover td { background: rgba(43, 226, 122, 0.06); }
.kw-table .kw-name { font-weight: 600; }
.kw-table .rec { color: var(--cyan); font-size: 16px; }
.mini-bar {
  display: inline-block;
  width: 90px;
  height: 8px;
  background: rgba(148, 163, 184, 0.12);
  border-radius: 999px;
  overflow: hidden;
  vertical-align: middle;
  margin-right: 8px;
}
.mini-bar .bar-fill { display: block; height: 100%; border-radius: 999px; transition: width 0.6s ease; }
.mini-val { font-size: 12px; color: var(--text-dim); }

.heat-list { display: flex; flex-direction: column; gap: 12px; }
.heat-row { display: flex; align-items: center; gap: 12px; }
.heat-name { width: 160px; font-size: 13px; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.heat-track { flex: 1; height: 10px; background: rgba(148, 163, 184, 0.12); border-radius: 999px; overflow: hidden; }
.heat-track .bar-fill { display: block; height: 100%; border-radius: 999px; }
.heat-val { width: 110px; text-align: right; font-size: 12px; color: var(--text-dim); }

.kw-selector { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 16px; }
.kw-chip {
  background: var(--bg);
  border: 1px solid var(--card-border);
  color: var(--text-dim);
  font-size: 13px;
  padding: 7px 16px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.2s;
}
.kw-chip:hover { border-color: var(--primary); color: var(--text); }
.kw-chip.active { background: var(--gradient); color: #fff; border-color: transparent; }

@media (max-width: 860px) {
  .overview-grid { grid-template-columns: 1fr; }
  .heat-row { flex-wrap: wrap; }
  .heat-name { width: 100%; }
  .heat-val { width: auto; }
}

/* ============ 标签页 ============ */
.tabs { display: flex; gap: 10px; margin-bottom: 22px; }
.tab-btn {
  background: var(--card);
  border: 1px solid var(--card-border);
  color: var(--text-dim);
  padding: 10px 24px;
  border-radius: 10px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
}
.tab-btn.active { background: var(--gradient); color: #fff; border-color: transparent; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* 收录卡片 */
.index-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 16px; }
.index-card {
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 20px;
  text-align: center;
}
.index-card .engine { font-size: 14px; color: var(--text-dim); margin-bottom: 8px; }
.index-card .count { font-size: 26px; font-weight: 800; }
.index-card .status { margin-top: 8px; }

/* 友链状态 */
.friend-status {
  display: inline-block;
  font-size: 15px;
  font-weight: 700;
  padding: 10px 24px;
  border-radius: 10px;
}
.friend-status.ok { background: rgba(52, 211, 153, 0.15); color: var(--green); }
.friend-status.fail { background: rgba(248, 113, 113, 0.15); color: var(--red); }
.friend-status.warn { background: rgba(251, 191, 36, 0.15); color: var(--yellow); }

/* ============ 博客首页 ============ */
.blog-hero {
  background:
    radial-gradient(700px 320px at 50% -20%, rgba(43, 226, 122, 0.25), transparent 65%),
    var(--bg);
  padding: 64px 0 56px;
  text-align: center;
}
.blog-hero h1 { font-size: 38px; font-weight: 800; margin-bottom: 10px; }
.blog-hero p { color: var(--text-dim); font-size: 16px; margin-bottom: 30px; }
.search-box { display: flex; gap: 12px; max-width: 560px; margin: 0 auto; }
.search-box .input { flex: 1; }

.blog-section { padding: 44px 0 70px; }
.blog-layout { display: grid; grid-template-columns: 1fr 320px; gap: 30px; align-items: start; }
.blog-toolbar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--card-border);
  padding-bottom: 14px;
  margin-bottom: 22px;
}
.blog-toolbar h2 { font-size: 21px; }
.post-count { color: var(--text-dim); font-size: 13px; }

.post-list { display: flex; flex-direction: column; gap: 18px; }
.post-card {
  display: flex;
  gap: 18px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 22px;
  transition: all 0.25s;
}
.post-card:hover { border-color: rgba(43, 226, 122, 0.45); transform: translateY(-3px); box-shadow: var(--shadow); }
.post-icon {
  font-size: 30px;
  width: 58px;
  height: 58px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(43, 226, 122, 0.1);
  border-radius: 12px;
}
.post-body { flex: 1; }
.post-meta { display: flex; align-items: center; gap: 12px; font-size: 12px; color: var(--text-dim); margin-bottom: 8px; flex-wrap: wrap; }
.post-cat {
  background: rgba(60, 240, 181, 0.12);
  color: var(--cyan);
  padding: 2px 10px;
  border-radius: 999px;
  font-weight: 600;
}
.post-title { font-size: 18px; line-height: 1.5; margin-bottom: 8px; }
.post-title a:hover { color: var(--cyan); }
.post-desc { color: var(--text-dim); font-size: 14px; margin-bottom: 12px; }
.post-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.post-tag { font-size: 12px; color: var(--text-dim); }
.post-tag:hover { color: var(--cyan); }

.empty-tip { text-align: center; color: var(--text-dim); padding: 40px 0; }

/* 侧边栏 */
.blog-side { display: flex; flex-direction: column; gap: 18px; }
.side-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 20px;
}
.side-card h3 { font-size: 15px; margin-bottom: 14px; padding-bottom: 10px; border-bottom: 1px solid var(--card-border); }
.about-text { font-size: 13px; color: var(--text-dim); line-height: 1.8; }
.about-meta { margin-top: 10px; font-size: 12px; color: var(--cyan); }

.side-list { list-style: none; }
.side-list li { margin-bottom: 6px; }
.side-list a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  color: var(--text);
  padding: 8px 10px;
  border-radius: 8px;
  transition: all 0.2s;
}
.side-list a:hover { background: rgba(43, 226, 122, 0.1); color: var(--cyan); }
.side-count {
  font-size: 12px;
  color: var(--text-dim);
  background: rgba(148, 163, 184, 0.1);
  padding: 1px 8px;
  border-radius: 999px;
}
.side-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--text-dim);
  border: 1px solid var(--card-border);
  padding: 4px 10px;
  border-radius: 999px;
  margin: 0 6px 8px 0;
  transition: all 0.2s;
}
.side-tag:hover { color: var(--cyan); border-color: var(--primary); }
.side-tag span { margin-left: 2px; opacity: 0.7; }

.hot-list a { display: block; font-size: 13px; line-height: 1.5; }
.hot-num {
  display: inline-block;
  width: 20px;
  height: 20px;
  line-height: 20px;
  text-align: center;
  font-size: 11px;
  font-weight: 700;
  border-radius: 6px;
  background: rgba(43, 226, 122, 0.16);
  color: var(--cyan);
  margin-right: 8px;
}

/* ============ 文章详情页 ============ */
.post-layout { display: grid; grid-template-columns: 1fr 300px; gap: 30px; align-items: start; }
.post-article {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 36px;
}
.post-head { margin-bottom: 28px; padding-bottom: 24px; border-bottom: 1px solid var(--card-border); }
.post-head h1 { font-size: 28px; line-height: 1.45; margin-bottom: 14px; }
.post-lead { color: var(--text-dim); font-size: 15px; margin-bottom: 14px; }
.post-content h2 {
  font-size: 20px;
  margin: 28px 0 12px;
  padding-left: 12px;
  border-left: 4px solid var(--primary);
}
.post-content p { font-size: 15px; line-height: 2; color: #cfe8d8; margin-bottom: 14px; }
.post-content p:first-of-type { margin-top: 0; }

.post-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 34px; padding-top: 22px; border-top: 1px solid var(--card-border); }
.pn-item {
  background: var(--bg);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 14px 16px;
  font-size: 13px;
  line-height: 1.6;
  transition: all 0.2s;
}
.pn-item span { display: block; font-size: 12px; color: var(--text-dim); margin-bottom: 4px; }
.pn-item:hover { border-color: var(--primary); color: var(--cyan); }
.back-link { color: var(--cyan); }

/* ============ 响应式 ============ */
@media (max-width: 860px) {
  .card-grid, .feature-grid, .flow-grid, .index-cards, .chart-grid { grid-template-columns: 1fr; }
  .report-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 30px; }
  .hero-stats { gap: 30px; }
  .input-group { flex-direction: column; }
  .header-inner { flex-direction: column; height: auto; padding: 14px 0; gap: 10px; }

  .blog-layout, .post-layout { grid-template-columns: 1fr; }
  .blog-hero h1 { font-size: 28px; }
  .search-box { flex-direction: row; }
  .post-card { flex-direction: column; }
  .post-icon { width: 48px; height: 48px; font-size: 24px; }
  .post-article { padding: 24px; }
  .post-head h1 { font-size: 22px; }
  .post-nav { grid-template-columns: 1fr; }
}

/* ============ 首页视频频道突出板块 ============ */
.video-feature {
  background:
    radial-gradient(600px 220px at 20% 0%, rgba(43, 226, 122, 0.18), transparent 70%),
    radial-gradient(500px 200px at 85% 100%, rgba(60, 240, 181, 0.12), transparent 70%),
    var(--bg);
  border-top: 1px solid var(--card-border);
  border-bottom: 1px solid var(--card-border);
  padding: 52px 0;
}
.vf-inner {
  display: flex;
  align-items: center;
  gap: 30px;
  flex-wrap: wrap;
}
.vf-brand { flex: 1; min-width: 260px; }
.vf-logo {
  width: 88px;
  height: 88px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 34px;
  color: #fff;
  background: var(--gradient);
  border-radius: 22px;
  box-shadow: 0 12px 32px rgba(43, 226, 122, 0.4);
  margin-bottom: 18px;
}
.vf-brand .vf-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--cyan);
  border: 1px solid rgba(60, 240, 181, 0.4);
  border-radius: 999px;
  padding: 3px 12px;
  margin-bottom: 10px;
}
.vf-brand h2 { font-size: 26px; margin-bottom: 8px; }
.vf-brand p { color: var(--text-dim); font-size: 14px; line-height: 1.8; max-width: 520px; }
.vf-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 18px; }
.vf-embed {
  width: 460px;
  max-width: 100%;
  height: 258px;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  background: var(--card);
  display: block;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}
.vf-embed-tip { font-size: 12px; color: var(--text-dim); margin-top: 8px; text-align: center; }
@media (max-width: 900px) {
  .vf-inner { flex-direction: column; align-items: flex-start; }
  .vf-embed { width: 100%; height: 220px; }
}

/* ============ 视频教程页 ============ */
.yt-channel {
  display: flex;
  align-items: center;
  gap: 22px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 26px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.yt-logo {
  width: 72px;
  height: 72px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  color: #fff;
  background: var(--gradient);
  border-radius: 50%;
  box-shadow: 0 8px 24px rgba(43, 226, 122, 0.4);
}
.yt-info { flex: 1; min-width: 220px; }
.yt-info h2 { font-size: 20px; margin-bottom: 6px; }
.yt-desc { color: var(--text-dim); font-size: 14px; line-height: 1.8; margin-bottom: 8px; }
.yt-handle { font-size: 13px; color: var(--text-dim); }
.yt-handle code { background: var(--bg); padding: 2px 8px; border-radius: 6px; color: var(--cyan); }
.yt-actions { display: flex; gap: 10px; flex-wrap: wrap; }

.video-embed-wrap { margin-bottom: 40px; }
.video-embed {
  width: 100%;
  height: 520px;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  background: var(--card);
  display: block;
}
.embed-tip { font-size: 12px; color: var(--text-dim); margin-top: 8px; text-align: center; }
.video-series { display: block; text-decoration: none; }
.video-series h3 { margin-bottom: 8px; }
.video-series:hover h3 { color: var(--cyan); }

/* ============ 客户案例 ============ */
.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}
.case-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.case-card:hover { transform: translateY(-4px); border-color: rgba(60, 240, 181, 0.45); }
.case-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--cyan);
  border: 1px solid rgba(60, 240, 181, 0.4);
  border-radius: 999px;
  padding: 3px 12px;
  margin-bottom: 12px;
}
.case-card h3 { font-size: 17px; margin-bottom: 14px; }
.case-data { display: flex; gap: 12px; margin-bottom: 14px; }
.case-num {
  flex: 1;
  background: var(--bg);
  border-radius: 10px;
  padding: 12px 8px;
  text-align: center;
}
.case-num strong { display: block; font-size: 20px; color: var(--cyan); margin-bottom: 4px; }
.case-num span { font-size: 12px; color: var(--text-dim); }
.case-desc { font-size: 13px; color: var(--text-dim); line-height: 1.8; }
.case-cta { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }

/* ============ FAQ 手风琴 ============ */
.faq-list { max-width: 820px; margin: 0 auto 28px; }
.faq-item {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
}
.faq-item summary {
  cursor: pointer;
  padding: 16px 44px 16px 20px;
  font-weight: 600;
  font-size: 15px;
  list-style: none;
  position: relative;
  transition: color 0.2s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--cyan);
  transition: transform 0.2s;
}
.faq-item[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-item summary:hover { color: var(--cyan); }
.faq-item p {
  padding: 0 20px 18px;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.8;
}

/* ============ 服务合作页 ============ */
.contact-box {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  margin-top: 26px;
}
.contact-item {
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.35);
  padding: 10px 22px;
  border-radius: 10px;
  font-size: 15px;
}
.contact-item strong { color: #fff; }
.contact-item a {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: opacity 0.2s;
}
.contact-item a:hover { opacity: 0.85; }

/* ============ 联系弹窗 ============ */
.modal-mask {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(3, 10, 7, 0.78);
  backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}
.modal-mask.show { opacity: 1; visibility: visible; }
.modal-box {
  width: 100%;
  max-width: 400px;
  background: linear-gradient(180deg, #0e1a14, #0a120d);
  border: 1px solid var(--card-border);
  border-radius: 18px;
  padding: 30px 26px;
  text-align: center;
  transform: translateY(16px) scale(0.97);
  transition: transform 0.25s ease;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
}
.modal-mask.show .modal-box { transform: translateY(0) scale(1); }
.modal-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  background: var(--gradient);
  border-radius: 50%;
  box-shadow: 0 10px 26px rgba(43, 226, 122, 0.4);
}
.modal-box h3 { font-size: 20px; margin-bottom: 10px; }
.modal-box p { color: var(--text-dim); font-size: 14px; line-height: 1.8; margin-bottom: 22px; }
.modal-actions { display: flex; gap: 12px; }
.modal-actions .btn { flex: 1; padding: 11px 10px; }

/* ============ 文章分页 ============ */
.pager {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 36px;
  flex-wrap: wrap;
}
.pager-btn {
  min-width: 38px;
  height: 38px;
  padding: 0 12px;
  border: 1px solid var(--card-border);
  border-radius: 8px;
  background: var(--card);
  color: var(--text-dim);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
}
.pager-btn:hover:not(:disabled) { border-color: var(--cyan); color: var(--cyan); }
.pager-btn.active { background: var(--gradient); color: #fff; border-color: transparent; }
.pager-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ============ 工具箱子导航 ============ */
.tool-tabs {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: -18px;
  padding-bottom: 8px;
}
.tool-tabs a {
  background: var(--card);
  border: 1px solid var(--card-border);
  color: var(--text-dim);
  padding: 9px 22px;
  border-radius: 999px;
  font-size: 14px;
  transition: all 0.2s;
}
.tool-tabs a:hover { color: var(--text); border-color: var(--primary); }
.tool-tabs a.active { background: var(--gradient); color: #fff; border-color: transparent; }