/* ============================================
   portal02 - 深色科技风（重构版）
   覆盖全部模板类名 + 移动端响应式
   2026-08-02 重构
   ============================================ */
:root {
  --bg: #0f0f13;
  --bg2: #16161f;
  --bg3: #1a1a24;
  --accent: #7c6af7;
  --accent2: #56cfb2;
  --text: #e2e2f0;
  --text2: #a0a0c0;
  --border: #2a2a40;
  --card-bg: #16161f;
  --radius: 14px;
  --shadow: 0 4px 24px rgba(124,106,247,0.10);
  --header-h: 64px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body { background: var(--bg); color: var(--text); font-family: 'PingFang SC','Microsoft YaHei','Segoe UI',sans-serif; font-size: 15px; line-height: 1.7; }
a { color: var(--accent); text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent2); }
img { max-width: 100%; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }

/* ============ HEADER ============ */
.site-header { background: rgba(15,15,19,0.95); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); gap: 20px; }
.header-logo { flex-shrink: 0; }
.header-logo a { font-size: 20px; font-weight: 800; letter-spacing: .5px; background: linear-gradient(90deg,#7c6af7,#56cfb2); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.header-nav { display: flex; align-items: center; gap: 6px; flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; -ms-overflow-style: none; }
.header-nav::-webkit-scrollbar { display: none; }
.header-nav a { color: var(--text2); font-size: 14px; padding: 6px 12px; border-radius: 8px; white-space: nowrap; }
.header-nav a:hover { color: var(--text); background: rgba(124,106,247,0.12); }
.header-actions { flex-shrink: 0; }
.btn-contact { display: inline-block; background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #fff !important; padding: 8px 22px; border-radius: 8px; font-size: 14px; font-weight: 600; transition: opacity .2s; }
.btn-contact:hover { opacity: .85; }
/* 移动端汉堡按钮（checkbox 方案） */
.nav-toggle { display: none; }
.nav-toggle-label { display: none; }
.nav-toggle-input { display: none; }

/* ============ HERO ============ */
.hero { background: linear-gradient(135deg, #0f0f13 0%, #1a0a3a 50%, #0a1a2a 100%); padding: 72px 0 56px; position: relative; overflow: hidden; }
.hero::before { content:''; position:absolute; top:-80px; right:-80px; width:420px; height:420px; background:radial-gradient(circle, rgba(124,106,247,0.18) 0%, transparent 70%); pointer-events:none; }
.hero::after { content:''; position:absolute; bottom:-120px; left:-60px; width:360px; height:360px; background:radial-gradient(circle, rgba(86,207,178,0.12) 0%, transparent 70%); pointer-events:none; }
.hero .container { position: relative; z-index: 1; }
.hero-title { font-size: 42px; font-weight: 800; line-height: 1.25; margin-bottom: 16px; background: linear-gradient(135deg, #fff 40%, var(--accent2)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-sub { font-size: 16px; color: var(--text2); margin-bottom: 28px; max-width: 640px; }
.hero-btn { display: inline-block; background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #fff; padding: 13px 36px; border-radius: 8px; font-size: 15px; font-weight: 600; box-shadow: 0 6px 24px rgba(124,106,247,0.35); transition: opacity .2s, transform .2s; }
.hero-btn:hover { opacity: .88; transform: translateY(-2px); color: #fff; }
.hero-tags { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 8px; }
.hero-tag { background: rgba(124,106,247,0.12); border: 1px solid rgba(124,106,247,0.25); color: var(--text2); padding: 4px 14px; border-radius: 20px; font-size: 13px; }
.hero-tag:hover { background: rgba(124,106,247,0.25); color: var(--text); }

/* ============ STATS ============ */
.stats-bar { background: var(--bg2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); padding: 26px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; text-align: center; }
.stat-num { font-size: 28px; font-weight: 800; color: var(--accent); line-height: 1.2; }
.stat-label { font-size: 13px; color: var(--text2); margin-top: 4px; }

/* ============ SECTION ============ */
.section { padding: 56px 0; }
.section-title { font-size: 24px; font-weight: 700; color: var(--text); margin-bottom: 30px; padding-left: 14px; border-left: 3px solid var(--accent); line-height: 1.4; }

/* ============ CARDS ============ */
.article-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.article-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; display: flex; flex-direction: column; transition: border-color .2s, transform .2s, box-shadow .2s; }
.article-card:hover { border-color: var(--accent); transform: translateY(-3px); box-shadow: var(--shadow); }
.card-title { font-size: 16px; font-weight: 600; margin-bottom: 10px; line-height: 1.5; }
.card-title a { color: var(--text); }
.card-title a:hover { color: var(--accent2); }
.card-excerpt { color: var(--text2); font-size: 13px; line-height: 1.65; margin-bottom: 16px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; flex: 1; }
.card-meta { display: flex; align-items: center; gap: 12px; font-size: 12px; color: var(--text2); margin-top: auto; }
.card-btn { margin-left: auto; background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #fff !important; padding: 5px 16px; border-radius: 6px; font-size: 12px; transition: opacity .2s; }
.card-btn:hover { opacity: .85; }

/* ============ TAG CLOUD ============ */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
.tag-pill { background: var(--bg2); border: 1px solid var(--border); color: var(--text2); padding: 6px 16px; border-radius: 20px; font-size: 13px; transition: all .2s; }
.tag-pill:hover { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ============ ARTICLE PAGE（文章页）============ */
.article-detail { display: grid; grid-template-columns: 1fr 300px; gap: 32px; padding: 44px 0; align-items: start; }
.article-main { min-width: 0; }
.article-h1 { font-size: 26px; font-weight: 700; color: var(--text); line-height: 1.45; margin-bottom: 14px; }
.article-h1 a { color: var(--text); }
.article-h1 a:hover { color: var(--accent2); }
.article-meta { color: var(--text2); font-size: 13px; padding-bottom: 18px; margin-bottom: 24px; border-bottom: 1px solid var(--border); display: flex; gap: 20px; flex-wrap: wrap; }
.article-body { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 34px 36px; color: var(--text); font-size: 15px; line-height: 1.9; word-break: break-word; }
.article-body p { margin-bottom: 16px; }
.article-body h2 { font-size: 20px; color: var(--accent2); margin: 28px 0 12px; font-weight: 700; }
.article-body h3 { font-size: 17px; color: var(--text); margin: 22px 0 10px; }
.article-body ul, .article-body ol { margin: 0 0 16px 1.4em; }
.article-body li { margin-bottom: 6px; }
.article-body a { color: var(--accent2); text-decoration: underline; }
.article-body strong { color: #fff; }
.article-nav { display: flex; justify-content: space-between; gap: 16px; margin-top: 24px; flex-wrap: wrap; }
.nav-prev, .nav-next { background: var(--bg2); border: 1px solid var(--border); border-radius: 10px; padding: 10px 18px; color: var(--text2); font-size: 13px; max-width: 48%; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; transition: all .2s; }
.nav-prev:hover, .nav-next:hover { border-color: var(--accent); color: var(--text); }
.related-section { margin-top: 28px; background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px 26px; }
.related-section h3 { font-size: 16px; font-weight: 700; color: var(--text); margin-bottom: 14px; padding-left: 10px; border-left: 3px solid var(--accent); }
.related-list { list-style: none; }
.related-list li { padding: 7px 0; border-bottom: 1px dashed var(--border); font-size: 14px; }
.related-list li:last-child { border-bottom: none; }
.related-list a { color: var(--text2); display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.related-list a:hover { color: var(--accent2); }

/* ============ SIDEBAR ============ */
.article-sidebar, .layout-aside { display: flex; flex-direction: column; gap: 20px; }
.sidebar-block { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 22px; }
.sidebar-title { font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 14px; padding-bottom: 10px; border-bottom: 1px solid var(--border); }
.sidebar-list { list-style: none; }
.sidebar-list li { padding: 7px 0; border-bottom: 1px dashed var(--border); font-size: 13px; }
.sidebar-list li:last-child { border-bottom: none; }
.sidebar-list a { color: var(--text2); display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sidebar-list a:hover { color: var(--accent2); }

/* ============ TAG PAGE（列表页）============ */
.layout-sidebar { display: grid; grid-template-columns: 1fr 300px; gap: 32px; align-items: start; }
.layout-main { min-width: 0; }
.pagination { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }
.page-num { display: inline-block; min-width: 34px; text-align: center; background: var(--bg2); border: 1px solid var(--border); border-radius: 8px; padding: 6px 10px; color: var(--text2); font-size: 13px; transition: all .2s; }
.page-num:hover { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ============ FOOTER ============ */
.site-footer { background: var(--bg2); border-top: 1px solid var(--border); padding: 48px 0 0; margin-top: 40px; }
.footer-cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; padding-bottom: 36px; }
.footer-brand { font-size: 20px; font-weight: 800; margin-bottom: 10px; background: linear-gradient(90deg,#7c6af7,#56cfb2); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.footer-desc { color: var(--text2); font-size: 13px; line-height: 1.8; }
.footer-col-title { font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 14px; }
.footer-col ul { list-style: none; }
.footer-col li { padding: 5px 0; font-size: 13px; }
.footer-col li a { color: var(--text2); }
.footer-col li a:hover { color: var(--accent2); }
.footer-bottom { border-top: 1px solid var(--border); padding: 18px 0; color: var(--text2); font-size: 12px; text-align: center; }

/* ============ RESPONSIVE ============ */
@media (max-width: 1024px) {
  .article-grid { grid-template-columns: repeat(2,1fr); }
  .article-detail, .layout-sidebar { grid-template-columns: 1fr; }
  .article-sidebar, .layout-aside { display: grid; grid-template-columns: 1fr 1fr; }
  .footer-cols { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .hero { padding: 48px 0 40px; }
  .hero-title { font-size: 30px; }
  .hero-sub { font-size: 15px; }
  .stats-grid { grid-template-columns: repeat(2,1fr); gap: 16px; }
  .section { padding: 40px 0; }
  /* 移动端导航：汉堡菜单 */
  .nav-toggle-label { display: flex; flex-direction: column; justify-content: center; gap: 5px; width: 40px; height: 40px; cursor: pointer; flex-shrink: 0; padding: 8px; }
  .nav-toggle-label span, .nav-toggle-label::before, .nav-toggle-label::after { content: ''; display: block; height: 2px; background: var(--text); border-radius: 2px; transition: all .25s; }
  .header-nav { display: none; position: absolute; top: var(--header-h); left: 0; right: 0; background: rgba(15,15,19,0.98); border-bottom: 1px solid var(--border); flex-direction: column; align-items: stretch; padding: 10px 20px 16px; gap: 2px; max-height: calc(100vh - var(--header-h)); overflow-y: auto; }
  .header-nav a { padding: 12px 8px; font-size: 15px; border-bottom: 1px solid var(--border); border-radius: 0; }
  .header-nav a:last-child { border-bottom: none; }
  .nav-toggle-input:checked ~ .header-nav { display: flex; }
  .nav-toggle-input:checked ~ .nav-toggle-label span { opacity: 0; }
  .nav-toggle-input:checked ~ .nav-toggle-label::before { transform: translateY(7px) rotate(45deg); }
  .nav-toggle-input:checked ~ .nav-toggle-label::after { transform: translateY(-7px) rotate(-45deg); }
  .article-body { padding: 24px 20px; }
  .article-nav { flex-direction: column; }
  .nav-prev, .nav-next { max-width: 100%; }
}
@media (max-width: 520px) {
  .container { padding: 0 14px; }
  .header-logo a { font-size: 17px; }
  .btn-contact { padding: 7px 14px; font-size: 13px; }
  .article-grid { grid-template-columns: 1fr; }
  .article-sidebar, .layout-aside { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: 1fr; gap: 24px; }
  .article-h1 { font-size: 21px; }
}