/* roulang page: index */
/* ========== 设计变量 ========== */
:root {
  --primary: #00E595;
  --primary-hover: #3DF0AF;
  --secondary: #7B5BFF;
  --accent: #FF3D81;
  --bg: #0B0D12;
  --section-bg: #141821;
  --card-bg: #1A1F2B;
  --text: #F2F6FF;
  --text-secondary: #A7B0C3;
  --text-placeholder: #626B7E;
  --border: #2A3040;
  --border-hover: rgba(0, 229, 149, .5);
  --radius-card: 16px;
  --radius-btn: 8px;
  --radius-tag: 4px;
  --shadow: 0 8px 24px rgba(0, 0, 0, .4);
  --shadow-hover: 0 0 0 1px rgba(0, 229, 149, .3), 0 12px 32px rgba(0, 0, 0, .5);
  --container: 1200px;
  --space-section: 80px;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", monospace;
  --gradient-btn: linear-gradient(80deg, var(--primary) 0%, var(--secondary) 100%);
}
/* ========== Reset / Base ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--primary-hover); }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; font-family: inherit; }
input, textarea { font-family: inherit; }
::selection { background: rgba(0, 229, 149, .3); }
/* ========== 容器 ========== */
.grid-container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.grid-container-fluid { width: 100%; padding: 0 24px; }
section { position: relative; }
/* ========== 顶部信息条 ========== */
.topbar {
  height: 40px;
  background: #07090C;
  border-bottom: 1px solid var(--primary);
  display: flex;
  align-items: center;
  font-size: 13px;
}
.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}
.topbar-domain { color: var(--text-secondary); font-family: var(--font-mono); letter-spacing: .05em; }
.topbar-entry a {
  color: var(--primary);
  font-weight: 600;
  font-size: 13px;
  border: 1px solid rgba(0, 229, 149, .4);
  padding: 4px 14px;
  border-radius: var(--radius-tag);
  transition: background .2s;
}
.topbar-entry a:hover { background: rgba(0, 229, 149, .1); }
/* ========== 主导航 ========== */
.main-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: 72px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  transition: height .3s, box-shadow .3s;
}
.main-nav.nav-scrolled { height: 56px; box-shadow: 0 8px 32px rgba(0, 0, 0, .6); }
.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
  height: 100%;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo-mark {
  width: 32px; height: 32px;
  border: 2px solid var(--primary);
  transform: rotate(45deg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  flex-shrink: 0;
}
.logo-mark::after {
  content: '';
  width: 8px; height: 8px;
  background: var(--secondary);
  transform: rotate(45deg);
}
.logo-text { font-size: 20px; font-weight: 700; color: var(--text); letter-spacing: .02em; }
.logo-text span { color: var(--primary); }
.nav-menu { display: flex; align-items: center; gap: 8px; }
.nav-menu li a {
  display: block;
  padding: 10px 14px;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-btn);
  position: relative;
  transition: color .2s;
}
.nav-menu li a:hover { color: var(--text); }
.nav-menu li a.active { color: var(--primary); }
.nav-menu li a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 14px;
  right: 14px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}
.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  width: 44px; height: 44px;
  border-radius: var(--radius-btn);
  font-size: 18px;
  align-items: center;
  justify-content: center;
}
/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  border: none;
  transition: transform .2s, box-shadow .2s, background .2s;
  text-decoration: none;
}
.btn-primary { background: var(--primary); color: #08130C; box-shadow: 0 4px 16px rgba(0, 229, 149, .2); }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-2px); box-shadow: 0 6px 24px rgba(0, 229, 149, .35); color: #08130C; }
.btn-primary:active { transform: translateY(0); box-shadow: inset 0 2px 4px rgba(0, 0, 0, .2); }
.btn-primary:focus-visible { outline: 2px dashed #fff; outline-offset: 2px; }
.btn-secondary { background: transparent; color: var(--primary); border: 1px solid var(--primary); }
.btn-secondary:hover { background: rgba(0, 229, 149, .1); color: var(--primary); transform: translateY(-2px); }
.btn-secondary:active { transform: translateY(0); }
.btn-secondary:focus-visible { outline: 2px dashed #fff; outline-offset: 2px; }
.btn-ghost { background: transparent; color: var(--text-secondary); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
/* ========== Hero ========== */
.hero {
  min-height: 78vh;
  display: flex;
  align-items: center;
  background-image: linear-gradient(90deg, rgba(7, 9, 12, .97) 0%, rgba(11, 13, 18, .8) 50%, rgba(11, 13, 18, .45) 100%), url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  position: relative;
  padding: 60px 0;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 50%; height: 100%;
  background-image: linear-gradient(rgba(0, 229, 149, .06) 1px, transparent 1px), linear-gradient(90deg, rgba(0, 229, 149, .06) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}
.hero-content { max-width: var(--container); margin: 0 auto; padding: 0 24px; width: 100%; position: relative; z-index: 2; }
.hero h1 {
  font-size: 56px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: .02em;
  max-width: 640px;
  color: var(--text);
  margin-bottom: 20px;
}
.hero h1 .highlight { color: var(--primary); }
.hero-sub {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 520px;
  line-height: 1.7;
  margin-bottom: 32px;
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 56px; }
.hero-trust { display: flex; gap: 48px; flex-wrap: wrap; }
.trust-item { display: flex; flex-direction: column; gap: 4px; }
.trust-num { font-family: var(--font-mono); font-size: 28px; font-weight: 700; color: var(--primary); }
.trust-label { font-size: 13px; color: var(--text-secondary); }
/* ========== 板块通用 ========== */
.section-pad { padding: var(--space-section) 0; }
.section-head { text-align: center; margin-bottom: 48px; }
.section-head h2 { font-size: 38px; font-weight: 700; letter-spacing: .02em; margin-bottom: 8px; color: var(--text); }
.section-head h2 span { color: var(--primary); }
.section-head p { color: var(--text-secondary); font-size: 16px; max-width: 560px; margin: 0 auto; }
.section-sub { font-size: 16px; color: var(--text-secondary); max-width: 560px; margin: 0 auto 48px; text-align: center; }
/* ========== 服务板块 ========== */
.services { background: var(--bg); }
.service-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 24px;
  height: 100%;
  transition: transform .3s, box-shadow .3s, border-color .3s;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 2px; height: 0;
  background: var(--primary);
  transition: height .4s;
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--border-hover); }
.service-card:hover::before { height: 100%; }
.service-card .service-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: rgba(0, 229, 149, .08);
  border: 1px solid rgba(0, 229, 149, .2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--primary);
  margin-bottom: 20px;
  flex-shrink: 0;
}
.service-card .service-icon.purple { background: rgba(123, 91, 255, .08); border-color: rgba(123, 91, 255, .2); color: var(--secondary); }
.service-card .service-icon.pink { background: rgba(255, 61, 129, .08); border-color: rgba(255, 61, 129, .2); color: var(--accent); }
.service-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; color: var(--text); }
.service-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; flex: 1; margin-bottom: 16px; }
.service-card .more-link { font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; transition: gap .2s; }
.service-card .more-link:hover { gap: 10px; }
.service-card .more-link i { font-size: 12px; }
/* 大卡片 */
.service-card-large {
  background: linear-gradient(135deg, rgba(0, 229, 149, .06), rgba(123, 91, 255, .04)), var(--card-bg);
  border: 1px solid rgba(0, 229, 149, .25);
  border-radius: var(--radius-card);
  padding: 32px;
  height: 100%;
  transition: transform .3s, box-shadow .3s;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.service-card-large::after {
  content: '';
  position: absolute;
  bottom: -40px; right: -40px;
  width: 140px; height: 140px;
  background: radial-gradient(circle, rgba(0, 229, 149, .08) 0%, transparent 70%);
  pointer-events: none;
}
.service-card-large:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.service-card-large .service-icon { width: 56px; height: 56px; border-radius: 14px; background: var(--primary); color: #08130C; font-size: 24px; border: none; margin-bottom: 24px; }
.service-card-large h3 { font-size: 24px; font-weight: 700; margin-bottom: 12px; color: var(--text); }
.service-card-large p { font-size: 15px; color: var(--text-secondary); line-height: 1.8; flex: 1; margin-bottom: 20px; }
.service-card-large .more-link { font-size: 15px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 8px; }
.service-card-large .more-link i { font-size: 14px; }
/* ========== 优势数据 ========== */
.stats {
  background: var(--section-bg);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 32px 24px;
  text-align: center;
  transition: border-color .3s, transform .3s;
}
.stat-item:hover { border-color: var(--border-hover); transform: translateY(-2px); }
.stat-num { font-family: var(--font-mono); font-size: 64px; font-weight: 700; color: var(--primary); line-height: 1.1; }
.stat-num .suffix { font-size: 32px; }
.stat-label { font-size: 14px; color: var(--text-secondary); margin-top: 12px; }
.stat-item.highlight .stat-num { color: var(--accent); }
/* ========== 案例板块 ========== */
.cases { background: var(--bg); }
.case-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: transform .3s, box-shadow .3s;
  display: flex;
  flex-direction: column;
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.case-img { position: relative; overflow: hidden; }
.case-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.case-card:hover .case-img img { transform: scale(1.03); }
.case-img::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 60%, rgba(11, 13, 18, .75)); }
.case-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.case-body .case-tag {
  align-self: flex-start;
  background: rgba(123, 91, 255, .12);
  color: var(--secondary);
  border: 1px solid rgba(123, 91, 255, .2);
  padding: 4px 10px;
  border-radius: var(--radius-tag);
  font-size: 12px;
  font-weight: 500;
  margin-bottom: 12px;
}
.case-body h3 { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 8px; line-height: 1.4; }
.case-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; flex: 1; margin-bottom: 16px; }
.case-body .case-link { font-size: 14px; font-weight: 600; color: var(--primary); }
/* 主案例大卡 */
.case-featured { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius-card); overflow: hidden; display: flex; height: 100%; transition: transform .3s, box-shadow .3s; }
.case-featured:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.case-featured .case-img { flex: 1.2; min-height: 320px; }
.case-featured .case-img img { height: 100%; object-fit: cover; }
.case-featured .case-body { flex: 1; padding: 32px; }
.case-featured .case-body h3 { font-size: 26px; margin-bottom: 14px; }
.case-featured .case-body p { font-size: 15px; line-height: 1.8; }
/* ========== 方案板块 ========== */
.plan {
  background: linear-gradient(rgba(20, 24, 33, .97), rgba(11, 13, 18, .95)), url('/assets/images/backpic/back-2.png') center / cover;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.plan-steps { display: flex; gap: 32px; position: relative; margin-top: 48px; }
.plan-step {
  flex: 1;
  background: rgba(26, 31, 43, .8);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 32px 24px;
  position: relative;
  z-index: 1;
  transition: border-color .3s, transform .3s;
}
.plan-step:hover { border-color: var(--border-hover); transform: translateY(-4px); }
.plan-step-num { font-family: var(--font-mono); font-size: 48px; font-weight: 700; color: transparent; background: linear-gradient(80deg, var(--primary), var(--secondary)); -webkit-background-clip: text; background-clip: text; line-height: 1; margin-bottom: 16px; }
.plan-step h3 { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.plan-step p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }
.plan-steps::before {
  content: '';
  position: absolute;
  top: 48px;
  left: 10%;
  right: 10%;
  border-top: 2px dashed rgba(0, 229, 149, .4);
  z-index: 0;
}
/* ========== 标签 ========== */
.tag {
  display: inline-block;
  background: rgba(0, 229, 149, .1);
  color: var(--primary);
  border: 1px solid rgba(0, 229, 149, .2);
  padding: 4px 12px;
  border-radius: var(--radius-tag);
  font-size: 12px;
  font-weight: 500;
}
.tag.gray { background: rgba(167, 176, 195, .1); color: var(--text-secondary); border-color: rgba(167, 176, 195, .2); }
.tag.violet { background: rgba(123, 91, 255, .1); color: var(--secondary); border-color: rgba(123, 91, 255, .2); }
/* ========== 最新信息 ========== */
.news { background: var(--bg); }
.news-list { display: flex; flex-direction: column; gap: 20px; }
.news-item {
  display: flex;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}
.news-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); border-color: var(--border-hover); }
.news-thumb { width: 200px; min-height: 120px; position: relative; overflow: hidden; flex-shrink: 0; }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; }
.thumb-placeholder {
  width: 100%; height: 100%;
  background: linear-gradient(135deg, rgba(0, 229, 149, .15), rgba(123, 91, 255, .1)), var(--card-bg);
  display: flex;
  align-items: center;
  justify-content: center;
}
.thumb-placeholder::after {
  content: '';
  width: 32px; height: 32px;
  border: 2px solid var(--primary);
  transform: rotate(45deg);
  opacity: .6;
}
.news-body { padding: 20px 24px; flex: 1; display: flex; flex-direction: column; }
.news-body h3 { font-size: 18px; font-weight: 600; color: var(--text); line-height: 1.5; margin-bottom: 6px; }
.news-body h3 a { color: inherit; }
.news-body h3 a:hover { color: var(--primary); }
.news-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; flex: 1; margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-meta { display: flex; align-items: center; gap: 16px; font-size: 13px; color: var(--text-placeholder); }
.news-meta .tag { margin-right: 0; }
.news-meta .date { font-family: var(--font-mono); }
.view-all { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; color: var(--primary); transition: gap .2s; }
.view-all:hover { gap: 12px; }
.empty-state {
  text-align: center;
  padding: 48px;
  border: 2px dashed var(--border);
  border-radius: var(--radius-card);
  color: var(--text-placeholder);
  font-size: 15px;
}
/* ========== FAQ ========== */
.faq { background: var(--section-bg); border-top: 1px solid var(--border); }
.faq-wrap { max-width: 760px; margin: 0 auto; }
.accordion { background: transparent !important; }
.accordion-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  margin-bottom: 16px;
  overflow: hidden;
  transition: border-color .3s;
}
.accordion-item.is-active { border-color: var(--border-hover); }
.accordion-item .accordion-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 48px;
  padding: 16px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  background: transparent;
  cursor: pointer;
  border-bottom: none;
}
.accordion-item .accordion-title:hover { color: var(--primary); background: rgba(0, 229, 149, .02); }
.accordion-item .accordion-title::after {
  content: '\002B';
  font-size: 22px;
  font-weight: 400;
  color: var(--primary);
  transition: transform .3s;
  margin-left: 16px;
  flex-shrink: 0;
}
.accordion-item.is-active .accordion-title::after { transform: rotate(45deg); }
.accordion-item .accordion-content {
  padding: 0 24px 20px;
  background: transparent;
  border: none;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}
/* ========== 联系 / CTA ========== */
.contact { background: var(--bg); }
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 56px; align-items: start; }
.contact-info h3 { font-size: 24px; font-weight: 700; color: var(--text); margin-bottom: 16px; }
.contact-info p { font-size: 15px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 32px; }
.contact-info .contact-line { display: flex; align-items: center; gap: 14px; margin-bottom: 20px; }
.contact-info .contact-line i { width: 36px; height: 36px; border-radius: 8px; background: rgba(0, 229, 149, .08); border: 1px solid rgba(0, 229, 149, .2); display: flex; align-items: center; justify-content: center; color: var(--primary); font-size: 15px; flex-shrink: 0; }
.contact-info .contact-line span { font-size: 15px; color: var(--text); }
.contact-form { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius-card); padding: 32px; }
.contact-form label { font-size: 14px; color: var(--text-secondary); margin-bottom: 6px; display: block; }
.contact-form label .required { color: var(--accent); margin-left: 2px; }
.contact-form input[type="text"],
.contact-form input[type="tel"],
.contact-form input[type="email"],
.contact-form textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-btn);
  padding: 12px 16px;
  font-size: 15px;
  color: var(--text);
  transition: border-color .2s, box-shadow .2s;
  margin-bottom: 20px;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 229, 149, .2);
}
.contact-form textarea { min-height: 120px; resize: vertical; }
.contact-form .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.contact-form .btn { width: 100%; }
/* ========== 页脚 ========== */
.footer {
  background: var(--bg);
  border-top: 2px solid var(--primary);
  padding: 56px 0 0;
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 40px; }
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; max-width: 260px; }
.footer-col h4 { font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 20px; letter-spacing: .02em; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 14px; color: var(--text-secondary); transition: color .2s, padding-left .2s; }
.footer-col ul li a:hover { color: var(--primary); padding-left: 4px; }
.footer-subscribe { display: flex; gap: 8px; }
.footer-subscribe input {
  flex: 1;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-btn);
  padding: 10px 14px;
  font-size: 14px;
  color: var(--text);
  min-width: 0;
}
.footer-subscribe input:focus { outline: none; border-color: var(--primary); }
.footer-subscribe .btn { height: 44px; padding: 0 20px; font-size: 14px; white-space: nowrap; }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: var(--text-placeholder);
}
.footer-bottom a { color: var(--text-secondary); margin-left: 12px; }
.footer-bottom a:hover { color: var(--primary); }
/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .hero h1 { font-size: 44px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .plan-steps { flex-direction: column; gap: 20px; }
  .plan-steps::before { display: none; }
  .news-thumb { width: 160px; }
}
@media (max-width: 768px) {
  .section-pad { padding: 48px 0; }
  .hero h1 { font-size: 34px; }
  .hero-sub { font-size: 16px; }
  .hero-trust { gap: 24px; }
  .section-head h2 { font-size: 28px; }
  .case-featured { flex-direction: column; }
  .case-featured .case-img { min-height: 200px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .contact-form .form-row { grid-template-columns: 1fr; }
  .news-item { flex-direction: column; }
  .news-thumb { width: 100%; height: 140px; }
}
@media (max-width: 640px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    position: fixed;
    top: 112px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px;
    display: none;
    z-index: 999;
    box-shadow: 0 16px 24px rgba(0, 0, 0, .5);
  }
  .nav-menu.nav-open { display: flex; }
  .nav-menu li a { padding: 12px 16px; line-height: 48px; font-size: 16px; border-radius: 8px; }
  .nav-menu li a.active::after { display: none; }
  .nav-menu li a.active { background: rgba(0, 229, 149, .06); color: var(--primary); }
  .main-nav.nav-scrolled ~ .nav-menu { top: 96px; }
  .topbar-entry a { font-size: 12px; }
  .hero { min-height: 70vh; text-align: center; }
  .hero h1 { font-size: 30px; }
  .hero-sub { margin-left: auto; margin-right: auto; }
  .hero-btns { justify-content: center; }
  .hero-trust { justify-content: center; }
  .stats-grid { gap: 12px; }
  .stat-num { font-size: 40px; }
  .stat-item { padding: 20px 12px; }
  .plan-step { padding: 24px; }
}
/* ========== 动画 ========== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero-content { animation: fadeInUp .8s ease-out; }

/* roulang page: category1 */
/* ========== 设计变量 ========== */
        :root {
            --color-primary: #00E595;
            --color-secondary: #7B5BFF;
            --color-accent: #FF3D81;
            --color-bg: #0B0D12;
            --color-bg-section: #141821;
            --color-card: #1A1F2B;
            --color-text: #F2F6FF;
            --color-text-secondary: #A7B0C3;
            --text-secondary: #A7B0C3;
            --color-text-muted: #626B7E;
            --color-border: #2A3040;
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-tag: 4px;
            --shadow: 0 8px 24px rgba(0, 0, 0, .4);
            --shadow-hover: 0 0 0 1px rgba(0, 229, 149, .3), 0 12px 32px rgba(0, 0, 0, .5);
            --font-mono: "JetBrains Mono", "Roboto Mono", "Courier New", monospace;
        }

        /* ========== Reset & Base ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            background: var(--color-bg);
            color: var(--color-text);
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: var(--color-primary);
            transition: color .3s ease;
        }

        a:hover {
            color: var(--color-primary);
        }

        ul {
            list-style: none;
        }

        .grid-container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ========== 按钮 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 48px;
            padding: 0 30px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            font-family: inherit;
            line-height: 1;
            border: none;
            cursor: pointer;
            text-decoration: none;
            transition: all .3s ease;
            box-shadow: var(--shadow);
        }

        .btn-primary {
            background: var(--color-primary);
            color: #0B0D12;
        }

        .btn-primary:hover {
            background: #00ffa8;
            color: #0B0D12;
            transform: translateY(-2px);
            box-shadow: 0 0 0 1px rgba(0, 229, 149, .4), 0 12px 28px rgba(0, 229, 149, .25);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: inset 0 3px 10px rgba(0, 0, 0, .2);
        }

        .btn-primary:focus-visible {
            outline: 2px dashed #fff;
            outline-offset: 3px;
        }

        .btn-secondary {
            background: transparent;
            color: var(--color-primary);
            border: 1px solid var(--color-primary);
            box-shadow: none;
        }

        .btn-secondary:hover {
            background: rgba(0, 229, 149, .1);
            color: var(--color-primary);
            transform: translateY(-2px);
        }

        .btn-secondary:focus-visible {
            outline: 2px dashed #fff;
            outline-offset: 3px;
        }

        /* ========== 导航 ========== */
        .main-nav {
            background: var(--color-bg);
            border-bottom: 1px solid var(--color-border);
            position: sticky;
            top: 0;
            z-index: 100;
            height: 72px;
            display: flex;
            align-items: center;
            transition: box-shadow .3s ease;
        }

        .main-nav.scrolled {
            box-shadow: 0 8px 32px rgba(0, 0, 0, .6);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            color: var(--color-text);
            transition: opacity .3s;
        }

        .logo:hover {
            opacity: .85;
        }

        .logo-mark {
            width: 34px;
            height: 34px;
            flex-shrink: 0;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
            border-radius: 8px;
        }

        .logo-text {
            font-size: 20px;
            font-weight: 700;
            letter-spacing: .02em;
            white-space: nowrap;
        }

        .logo-text span {
            color: var(--color-primary);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 28px;
            margin: 0;
            padding: 0;
        }

        .nav-menu a {
            color: var(--color-text-secondary);
            text-decoration: none;
            font-size: 15px;
            font-weight: 500;
            padding: 10px 2px;
            position: relative;
            transition: color .3s;
            white-space: nowrap;
        }

        .nav-menu a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: left;
            transition: transform .3s ease;
        }

        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--color-primary);
        }

        .nav-menu a.active::after,
        .nav-menu a:hover::after {
            transform: scaleX(1);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--color-border);
            border-radius: 8px;
            color: var(--color-text);
            font-size: 22px;
            width: 44px;
            height: 44px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: border-color .3s;
        }

        .nav-toggle:hover {
            border-color: var(--color-primary);
        }

        /* ========== 面包屑 & 页头 ========== */
        .page-hero {
            position: relative;
            padding: 72px 0 64px;
            overflow: hidden;
            border-bottom: 1px solid var(--color-border);
        }

        .page-hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: .35;
            z-index: 0;
        }

        .page-hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(11, 13, 18, .96) 0%, rgba(11, 13, 18, .78) 55%, rgba(11, 13, 18, .4) 100%);
        }

        .page-hero .grid-container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            font-size: 13px;
            color: var(--color-text-muted);
            margin-bottom: 28px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .breadcrumb a {
            color: var(--color-text-secondary);
            text-decoration: none;
            transition: color .3s;
        }

        .breadcrumb a:hover {
            color: var(--color-primary);
        }

        .breadcrumb .sept {
            color: var(--color-border);
        }

        .breadcrumb .current {
            color: var(--color-primary);
        }

        .page-hero h1 {
            font-size: 56px;
            font-weight: 700;
            line-height: 1.15;
            letter-spacing: .02em;
            margin-bottom: 18px;
            max-width: 720px;
        }

        .page-hero-desc {
            font-size: 18px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            max-width: 600px;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        /* ========== 主内容区 ========== */
        .guide-main {
            padding: 72px 0 80px;
        }

        .guide-content {
            font-size: 17px;
            line-height: 1.85;
            color: var(--color-text);
        }

        .guide-content .lead {
            font-size: 19px;
            line-height: 1.9;
            color: var(--color-text);
            border-left: 3px solid var(--color-primary);
            padding-left: 20px;
            margin-bottom: 28px;
        }

        .guide-content img {
            border-radius: var(--radius-card);
            margin: 36px 0;
            width: 100%;
            height: auto;
            box-shadow: var(--shadow);
        }

        .guide-content h2 {
            font-size: 30px;
            font-weight: 700;
            letter-spacing: .02em;
            margin: 52px 0 12px;
            position: relative;
            padding-bottom: 14px;
        }

        .guide-content h2::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 48px;
            height: 3px;
            border-radius: 3px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
        }

        .guide-content h2:first-child {
            margin-top: 0;
        }

        .guide-content h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--color-text);
        }

        .guide-content p {
            margin-bottom: 18px;
            color: var(--color-text-secondary);
        }

        .guide-content p strong {
            color: var(--color-text);
        }

        /* 模块列表 */
        .module-list {
            margin: 40px 0;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .module-item {
            display: flex;
            gap: 24px;
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 28px 32px;
            transition: border-color .3s, box-shadow .3s, transform .3s;
        }

        .module-item:hover {
            border-color: rgba(0, 229, 149, .5);
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }

        .module-index {
            font-family: var(--font-mono);
            font-size: 36px;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1;
            flex-shrink: 0;
            padding-top: 2px;
        }

        .module-item h3 {
            margin-bottom: 6px;
        }

        .module-item p {
            margin-bottom: 0;
            font-size: 15px;
            line-height: 1.7;
            color: var(--color-text-secondary);
        }

        /* 受众列表 */
        .audience-list {
            margin: 32px 0;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .audience-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            background: var(--color-bg-section);
            border: 1px solid var(--color-border);
            border-radius: 12px;
            padding: 18px 22px;
            font-size: 16px;
            color: var(--color-text);
            transition: border-color .3s;
        }

        .audience-list li:hover {
            border-color: rgba(0, 229, 149, .35);
        }

        .audience-list i {
            color: var(--color-primary);
            font-size: 18px;
            margin-top: 3px;
        }

        blockquote {
            background: linear-gradient(135deg, rgba(123, 91, 255, .08), rgba(0, 229, 149, .06));
            border-left: 4px solid var(--color-secondary);
            border-radius: 0 12px 12px 0;
            padding: 24px 28px;
            margin: 40px 0;
            font-size: 18px;
            font-style: normal;
            color: var(--color-text);
        }

        blockquote::before {
            content: '\201C';
            font-size: 40px;
            color: var(--color-secondary);
            line-height: 0;
            margin-right: 8px;
            vertical-align: -8px;
        }

        /* ========== 侧栏 ========== */
        .guide-side {
            position: sticky;
            top: 96px;
            align-self: flex-start;
        }

        .side-card {
            background: var(--color-bg-section);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 28px;
            margin-bottom: 24px;
        }

        .side-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 20px;
            padding-bottom: 14px;
            border-bottom: 1px solid var(--color-border);
            position: relative;
        }

        .side-card h3::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -1px;
            width: 36px;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px;
        }

        .guide-card-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .guide-card {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: 14px;
            padding: 20px;
            text-decoration: none;
            transition: border-color .3s, box-shadow .3s, transform .3s;
        }

        .guide-card:hover {
            border-color: rgba(0, 229, 149, .5);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .guide-card-icon {
            width: 42px;
            height: 42px;
            flex-shrink: 0;
            border-radius: 10px;
            background: linear-gradient(135deg, rgba(0, 229, 149, .18), rgba(123, 91, 255, .18));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--color-primary);
        }

        .guide-card-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 4px;
            display: block;
        }

        .guide-card-desc {
            font-size: 13px;
            color: var(--color-text-secondary);
            line-height: 1.5;
        }

        .guide-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--color-primary);
            background: rgba(0, 229, 149, .1);
            border-radius: var(--radius-tag);
            padding: 3px 10px;
            margin-bottom: 10px;
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: var(--color-bg-section);
            padding: 80px 0;
            border-top: 1px solid var(--color-border);
        }

        .section-head {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-head h2 {
            font-size: 38px;
            font-weight: 700;
            letter-spacing: .02em;
            margin-bottom: 12px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--color-text-secondary);
            max-width: 520px;
            margin: 0 auto;
        }

        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: 14px;
            margin-bottom: 16px;
            overflow: hidden;
            transition: border-color .3s, box-shadow .3s;
        }

        .faq-item[open] {
            border-color: rgba(0, 229, 149, .35);
            box-shadow: var(--shadow);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 22px 28px;
            font-size: 17px;
            font-weight: 600;
            color: var(--color-text);
            cursor: pointer;
            user-select: none;
            list-style: none;
            min-height: 48px;
            transition: background .3s;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary:hover {
            background: rgba(0, 229, 149, .04);
        }

        .faq-item summary i {
            font-size: 20px;
            color: var(--color-primary);
            transition: transform .35s ease;
            flex-shrink: 0;
        }

        .faq-item[open] summary i {
            transform: rotate(45deg);
        }

        .faq-item p {
            padding: 0 28px 24px;
            font-size: 15px;
            line-height: 1.75;
            color: var(--color-text-secondary);
        }

        /* ========== CTA ========== */
        .cta-banner {
            padding: 88px 0;
            background: linear-gradient(135deg, #0B0D12 0%, #141821 55%, rgba(123, 91, 255, .12) 100%);
            border-top: 1px solid var(--color-border);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-secondary), transparent);
        }

        .cta-inner {
            max-width: 640px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }

        .cta-inner h2 {
            font-size: 38px;
            font-weight: 700;
            letter-spacing: .02em;
            margin-bottom: 16px;
        }

        .cta-inner p {
            font-size: 17px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin-bottom: 32px;
        }

        /* ========== 页脚 ========== */
        .footer {
            background: var(--color-bg);
            border-top: 2px solid var(--color-primary);
            padding-top: 56px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 44px;
        }

        .footer-brand .logo {
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            max-width: 260px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
            color: var(--color-text);
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col a {
            font-size: 14px;
            color: var(--color-text-secondary);
            text-decoration: none;
            transition: color .3s;
        }

        .footer-col a:hover {
            color: var(--color-primary);
        }

        .footer-subscribe {
            display: flex;
            gap: 10px;
            margin-top: 8px;
        }

        .footer-subscribe input {
            flex: 1;
            height: 44px;
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-btn);
            padding: 0 16px;
            color: var(--color-text);
            font-size: 14px;
            font-family: inherit;
            outline: none;
            transition: border-color .3s, box-shadow .3s;
            min-width: 0;
        }

        .footer-subscribe input:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(0, 229, 149, .15);
        }

        .footer-subscribe .btn {
            height: 44px;
            padding: 0 20px;
            font-size: 14px;
            flex-shrink: 0;
        }

        .footer-bottom {
            border-top: 1px solid var(--color-border);
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-bottom span,
        .footer-bottom a {
            font-size: 13px;
            color: var(--color-text-muted);
        }

        .footer-bottom a {
            text-decoration: none;
            transition: color .3s;
        }

        .footer-bottom a:hover {
            color: var(--color-primary);
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .nav-menu {
                gap: 16px;
            }
            .nav-menu a {
                font-size: 14px;
            }
            .page-hero h1 {
                font-size: 44px;
            }
            .guide-content h2 {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }
            .nav-menu {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: var(--color-bg);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px 28px;
                gap: 0;
                border-bottom: 1px solid var(--color-border);
                box-shadow: 0 24px 40px rgba(0, 0, 0, .5);
                transform: translateY(-120%);
                opacity: 0;
                visibility: hidden;
                transition: transform .35s ease, opacity .3s ease, visibility .3s;
                z-index: 99;
            }
            .nav-menu.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .nav-menu a {
                width: 100%;
                padding: 14px 0;
                font-size: 16px;
                border-bottom: 1px solid rgba(42, 48, 64, .6);
            }
            .nav-menu a::after {
                display: none;
            }
            .nav-menu li:last-child a {
                border-bottom: none;
            }

            .page-hero {
                padding: 48px 0 40px;
            }
            .page-hero h1 {
                font-size: 34px;
            }
            .page-hero-desc {
                font-size: 16px;
            }
            .hero-actions .btn {
                width: 100%;
            }

            .guide-main {
                padding: 48px 0 56px;
            }
            .guide-content {
                font-size: 16px;
            }
            .guide-content .lead {
                font-size: 17px;
            }
            .module-item {
                flex-direction: column;
                gap: 12px;
                padding: 24px;
            }
            .guide-side {
                position: static;
                margin-top: 40px;
            }
            .faq-section {
                padding: 56px 0;
            }
            .section-head h2 {
                font-size: 30px;
            }
            .cta-banner {
                padding: 60px 0;
            }
            .cta-inner h2 {
                font-size: 30px;
            }
            .cta-inner p {
                font-size: 15px;
            }
        }

        @media (max-width: 640px) {
            .grid-container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-subscribe {
                flex-direction: column;
            }
            .footer-subscribe .btn {
                width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .breadcrumb {
                font-size: 12px;
                flex-wrap: wrap;
            }
            .guide-content h2 {
                font-size: 24px;
            }
        }

        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 30px;
            }
            .page-hero-desc {
                font-size: 15px;
            }
            .section-head h2 {
                font-size: 28px;
            }
            .module-index {
                font-size: 30px;
            }
            .faq-item summary {
                font-size: 15px;
                padding: 18px 20px;
            }
            .faq-item p {
                padding: 0 20px 20px;
            }
        }

/* roulang page: article */
:root{
  --color-primary:#00E595;
  --color-secondary:#7B5BFF;
  --color-accent:#FF3D81;
  --color-bg:#0B0D12;
  --color-block:#141821;
  --color-card:#1A1F2B;
  --color-text:#F2F6FF;
  --color-text-secondary:#A7B0C3;
  --color-text-muted:#626B7E;
  --color-border:#2A3040;
  --radius-card:16px;
  --radius-btn:8px;
  --radius-input:8px;
  --radius-tag:4px;
  --shadow:0 8px 24px rgba(0,0,0,.4);
  --shadow-hover:0 0 0 1px rgba(0,229,149,.3),0 12px 32px rgba(0,0,0,.5);
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",monospace;
  --container-w:1200px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-cn);
  background-color:var(--color-bg);
  background-image:linear-gradient(rgba(0,229,149,.02) 1px,transparent 1px),linear-gradient(90deg,rgba(0,229,149,.02) 1px,transparent 1px);
  background-size:44px 44px;
  color:var(--color-text);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--color-primary);text-decoration:none;transition:color .2s}
a:hover{color:#6affbd}
img{max-width:100%;height:auto;display:block}
button{font-family:inherit}
.grid-container{max-width:var(--container-w);padding-left:20px;padding-right:20px}
/* ===== 顶部信息条 ===== */
.topbar{
  height:40px;
  background:#07080C;
  border-bottom:1px solid rgba(0,229,149,.25);
  display:flex;
  align-items:center;
  font-family:var(--font-mono);
  position:relative;
  z-index:110;
}
.topbar-inner{display:flex;justify-content:space-between;align-items:center;height:100%;width:100%}
.topbar-domain{color:var(--color-text-secondary);font-size:12px;letter-spacing:.5px}
.topbar-action{
  color:var(--color-primary);
  font-size:12px;
  display:flex;
  align-items:center;
  gap:6px;
}
.topbar-action:hover{color:#fff}
.topbar-action i{font-size:10px;transition:transform .2s}
.topbar-action:hover i{transform:translateX(3px)}
/* ===== 主导航 ===== */
.main-nav{
  width:100%;
  height:72px;
  background:rgba(11,13,18,.96);
  border-bottom:1px solid var(--color-border);
  position:sticky;
  top:0;
  z-index:100;
  transition:height .3s ease,box-shadow .3s ease;
}
.main-nav.scrolled{height:56px;box-shadow:0 8px 24px rgba(0,0,0,.55);background:rgba(11,13,18,.99)}
.nav-inner{display:flex;justify-content:space-between;align-items:center;height:72px;transition:height .3s ease}
.main-nav.scrolled .nav-inner{height:56px}
.logo{display:flex;align-items:center;gap:10px}
.logo-mark{
  width:32px;height:32px;
  background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));
  border-radius:8px;
  position:relative;
  flex-shrink:0;
}
.logo-mark::after{
  content:'';
  position:absolute;
  inset:7px;
  background:var(--color-bg);
  border-radius:4px;
  transform:rotate(45deg);
}
.logo-text{font-size:20px;font-weight:700;color:var(--color-text);letter-spacing:.02em;line-height:1}
.logo-text span{color:var(--color-primary)}
.nav-menu{
  display:flex;list-style:none;gap:6px;margin:0;padding:0;
}
.nav-menu li{margin:0}
.nav-menu a{
  color:var(--color-text-secondary);
  font-size:15px;
  padding:8px 6px;
  position:relative;
  transition:color .2s;
  font-weight:400;
}
.nav-menu a:hover{color:var(--color-primary)}
.nav-menu a.active{color:var(--color-primary)}
.nav-menu a.active::after{
  content:'';
  position:absolute;
  left:6px;right:6px;bottom:-2px;
  height:2px;
  background:var(--color-primary);
  border-radius:2px;
}
.nav-toggle{
  display:none;
  background:none;border:none;
  color:var(--color-text);
  font-size:22px;
  cursor:pointer;
  padding:8px;
  line-height:1;
}
.nav-toggle:focus{outline:2px dashed var(--color-primary);outline-offset:2px}
/* ===== 文章 Banner ===== */
.article-banner{
  position:relative;
  padding:64px 0 56px;
  background:
    linear-gradient(90deg,rgba(11,13,18,.97) 0%,rgba(11,13,18,.85) 55%,rgba(11,13,18,.65) 100%),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  border-bottom:1px solid var(--color-border);
}
.article-banner::after{
  content:'';
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:linear-gradient(90deg,var(--color-primary),transparent 70%);
  opacity:.6;
}
/* ===== 面包屑 ===== */
.article-breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
  color:var(--color-text-muted);
  margin-bottom:24px;
}
.article-breadcrumb a{color:var(--color-text-muted);transition:color .2s}
.article-breadcrumb a:hover{color:var(--color-primary)}
.breadcrumb-sep{color:var(--color-text-muted);font-family:var(--font-mono);font-size:12px}
.breadcrumb-current{color:var(--color-primary);max-width:280px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
/* ===== 文章标题与元信息 ===== */
.article-title{
  font-size:42px;
  font-weight:700;
  color:var(--color-text);
  line-height:1.3;
  letter-spacing:.01em;
  margin:0 0 20px;
  max-width:860px;
}
.article-meta{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:20px;
  font-size:14px;
  color:var(--color-text-secondary);
}
.meta-item{display:flex;align-items:center;gap:8px;font-family:var(--font-mono)}
.meta-item .fa-regular,.meta-item .fa-solid{color:var(--color-primary);font-size:13px}
.meta-item a{color:var(--color-text-secondary);text-decoration:none;transition:color .2s;font-family:var(--font-cn)}
.meta-item a:hover{color:var(--color-primary)}
/* ===== 文章正文区 ===== */
.article-section{padding:64px 0}
.article-card-wrap{
  max-width:860px;
  margin:0 auto;
  background:var(--color-card);
  border:1px solid var(--color-border);
  border-radius:20px;
  padding:48px 56px;
  box-shadow:var(--shadow);
  position:relative;
}
.article-body{
  max-width:760px;
  margin:0 auto;
  font-size:17px;
  line-height:1.9;
  color:var(--color-text);
  letter-spacing:.01em;
}
.article-body>p{margin-bottom:26px;color:#D6DEEF}
.article-body strong{color:var(--color-text);font-weight:600}
.article-body h2{
  font-size:28px;
  font-weight:700;
  color:var(--color-text);
  margin:44px 0 20px;
  padding-bottom:14px;
  border-bottom:1px solid var(--color-border);
  position:relative;
}
.article-body h2::before{
  content:'';
  position:absolute;
  left:0;bottom:-1px;
  width:48px;height:2px;
  background:var(--color-primary);
  border-radius:2px;
}
.article-body h3{
  font-size:22px;
  font-weight:600;
  color:var(--color-text);
  margin:36px 0 16px;
}
.article-body h4{
  font-size:18px;
  font-weight:600;
  color:var(--color-text);
  margin:28px 0 12px;
}
.article-body img{
  border-radius:12px;
  border:1px solid var(--color-border);
  margin:28px 0;
  width:100%;
}
.article-body blockquote{
  border-left:4px solid var(--color-primary);
  background:rgba(0,229,149,.06);
  padding:20px 24px;
  border-radius:0 12px 12px 0;
  color:var(--color-text-secondary);
  margin:28px 0;
}
.article-body blockquote p{margin-bottom:8px;color:var(--color-text-secondary)}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body ul,.article-body ol{
  margin:20px 0 28px;
  padding-left:22px;
}
.article-body ul li{margin-bottom:8px;line-height:1.8;color:#C8D0E0}
.article-body ol li{margin-bottom:8px;line-height:1.8;color:#C8D0E0}
.article-body ul li::marker{color:var(--color-primary)}
.article-body ol li::marker{color:var(--color-primary);font-family:var(--font-mono)}
.article-body a{color:var(--color-primary);border-bottom:1px solid transparent;transition:border-color .2s}
.article-body a:hover{border-bottom-color:var(--color-primary)}
.article-body code{
  background:rgba(0,229,149,.08);
  border:1px solid rgba(0,229,149,.15);
  color:var(--color-primary);
  border-radius:4px;
  padding:2px 8px;
  font-size:14px;
  font-family:var(--font-mono);
}
.article-body pre{
  background:var(--color-bg);
  border:1px solid var(--color-border);
  border-radius:12px;
  padding:20px;
  overflow-x:auto;
  margin:24px 0;
}
.article-body pre code{
  background:none;border:none;padding:0;font-size:14px;line-height:1.7;
}
.article-body hr{
  border:none;
  height:1px;
  background:var(--color-border);
  margin:40px 0;
}
.article-body table{
  width:100%;
  border-collapse:collapse;
  margin:24px 0;
  font-size:15px;
}
.article-body th{
  background:var(--color-block);
  color:var(--color-text);
  padding:12px 16px;
  text-align:left;
  border:1px solid var(--color-border);
  font-weight:600;
}
.article-body td{
  padding:12px 16px;
  border:1px solid var(--color-border);
  color:#C8D0E0;
}
/* ===== 空状态 ===== */
.article-empty{
  text-align:center;
  padding:48px 24px;
}
.article-empty i{
  font-size:48px;
  color:var(--color-primary);
  margin-bottom:16px;
  opacity:.7;
}
.article-empty h2{
  font-size:26px;
  font-weight:700;
  color:var(--color-text);
  margin-bottom:12px;
}
.article-empty p{
  color:var(--color-text-secondary);
  margin-bottom:28px;
}
/* ===== 标签 ===== */
.article-after{padding-top:0}
.article-tags{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:12px;
  margin-bottom:32px;
}
.tags-label{
  font-size:14px;
  color:var(--color-text-muted);
}
.tag-chip{
  display:inline-flex;
  align-items:center;
  padding:6px 16px;
  background:rgba(0,229,149,.07);
  border:1px solid rgba(0,229,149,.2);
  color:var(--color-primary);
  border-radius:var(--radius-tag);
  font-size:13px;
  text-decoration:none;
  transition:background .2s,border-color .2s;
}
.tag-chip:hover{
  background:rgba(0,229,149,.15);
  border-color:var(--color-primary);
  color:var(--color-primary);
}
/* ===== 上下篇 ===== */
.article-pager{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
}
.pager-item{
  background:var(--color-card);
  border:1px solid var(--color-border);
  border-radius:12px;
  padding:20px;
  text-decoration:none;
  transition:all .3s;
  display:flex;
  flex-direction:column;
  gap:6px;
}
.pager-item:hover{
  border-color:rgba(0,229,149,.5);
  box-shadow:var(--shadow-hover);
  transform:translateY(-2px);
}
.pager-direction{
  font-size:12px;
  color:var(--color-text-muted);
  font-family:var(--font-mono);
}
.pager-title{
  font-size:15px;
  color:var(--color-text);
  font-weight:500;
  line-height:1.4;
}
.pager-item:hover .pager-title{color:var(--color-primary)}
.pager-next{text-align:right}
/* ===== 相关推荐 ===== */
.related-section{background:var(--color-block);border-top:1px solid var(--color-border);border-bottom:1px solid var(--color-border)}
.section-title{
  font-size:32px;
  font-weight:700;
  color:var(--color-text);
  margin-bottom:40px;
  display:flex;
  align-items:center;
  gap:14px;
}
.section-title::before{
  content:'';
  width:4px;
  height:26px;
  background:linear-gradient(180deg,var(--color-primary),var(--color-secondary));
  border-radius:2px;
}
.related-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.related-card{
  background:var(--color-card);
  border:1px solid var(--color-border);
  border-radius:var(--radius-card);
  overflow:hidden;
  display:block;
  text-decoration:none;
  transition:transform .3s,border-color .3s,box-shadow .3s;
}
.related-card:hover{
  transform:translateY(-4px);
  border-color:rgba(0,229,149,.5);
  box-shadow:var(--shadow-hover);
}
.related-thumb{
  aspect-ratio:16/9;
  overflow:hidden;
  background:linear-gradient(135deg,var(--color-block),var(--color-card));
}
.related-thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .4s ease;
}
.related-card:hover .related-thumb img{transform:scale(1.04)}
.related-info{padding:20px 24px 24px}
.related-info h3{
  font-size:16px;
  font-weight:600;
  color:var(--color-text);
  line-height:1.5;
  margin:0 0 12px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  transition:color .2s;
}
.related-card:hover .related-info h3{color:var(--color-primary)}
.related-time{
  font-size:13px;
  color:var(--color-text-muted);
  font-family:var(--font-mono);
  display:flex;
  align-items:center;
  gap:6px;
}
.related-time i{font-size:12px}
/* ===== 文章 CTA ===== */
.article-cta{padding:80px 0}
.cta-box{
  background:var(--color-block);
  border:1px solid var(--color-border);
  border-radius:20px;
  padding:56px 48px;
  text-align:center;
  position:relative;
  overflow:hidden;
}
.cta-box::before{
  content:'';
  position:absolute;
  top:0;left:0;right:0;
  height:2px;
  background:linear-gradient(90deg,var(--color-primary),var(--color-secondary));
}
.cta-box::after{
  content:'';
  position:absolute;
  right:-60px;bottom:-60px;
  width:200px;height:200px;
  border:1px solid rgba(123,91,255,.2);
  border-radius:50%;
}
.cta-box h2{
  font-size:32px;
  font-weight:700;
  color:var(--color-text);
  margin-bottom:12px;
}
.cta-box p{
  color:var(--color-text-secondary);
  font-size:16px;
  margin-bottom:32px;
  max-width:520px;
  margin-left:auto;
  margin-right:auto;
}
/* ===== 按钮 ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 28px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  transition:all .25s;
  border:1px solid transparent;
  text-decoration:none;
  line-height:1;
  font-family:var(--font-cn);
}
.btn:focus{outline:2px dashed #fff;outline-offset:2px}
.btn-primary{
  background:var(--color-primary);
  color:#06100B;
}
.btn-primary:hover{
  background:#34f5ac;
  color:#06100B;
  transform:translateY(-2px);
  box-shadow:0 8px 20px rgba(0,229,149,.35);
}
.btn-primary:active{
  transform:translateY(0);
  box-shadow:inset 0 3px 8px rgba(0,0,0,.25);
}
.btn-outline{
  background:transparent;
  border-color:var(--color-primary);
  color:var(--color-primary);
}
.btn-outline:hover{
  background:rgba(0,229,149,.1);
  color:var(--color-primary);
  transform:translateY(-2px);
}
.btn-outline:active{
  transform:translateY(0);
  box-shadow:inset 0 2px 6px rgba(0,0,0,.2);
}
.btn-large{height:52px;padding:0 36px;font-size:16px}
/* ===== 页脚 ===== */
.footer{
  background:var(--color-bg);
  border-top:2px solid var(--color-primary);
  padding:64px 0 0;
  margin-top:24px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.3fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand .logo-text{font-size:22px}
.footer-brand p{
  font-size:14px;
  color:var(--color-text-secondary);
  line-height:1.8;
  margin-top:16px;
  max-width:280px;
}
.footer-col h4{
  font-size:15px;
  font-weight:600;
  color:var(--color-text);
  margin-bottom:18px;
  position:relative;
  padding-bottom:10px;
}
.footer-col h4::after{
  content:'';
  position:absolute;
  left:0;bottom:0;
  width:24px;height:2px;
  background:var(--color-primary);
  border-radius:2px;
}
.footer-col ul{list-style:none;margin:0;padding:0}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{
  color:var(--color-text-secondary);
  font-size:14px;
  text-decoration:none;
  transition:color .2s,padding-left .2s;
}
.footer-col ul a:hover{
  color:var(--color-primary);
  padding-left:4px;
}
.footer-subscribe{
  display:flex;
  gap:10px;
  margin-top:16px;
}
.footer-subscribe input{
  height:42px;
  background:var(--color-bg);
  border:1px solid var(--color-border);
  border-radius:var(--radius-input);
  color:var(--color-text);
  padding:0 14px;
  flex:1;
  font-size:14px;
  transition:border-color .2s,box-shadow .2s;
  font-family:var(--font-cn);
}
.footer-subscribe input::placeholder{color:var(--color-text-muted)}
.footer-subscribe input:focus{
  outline:none;
  border-color:var(--color-primary);
  box-shadow:0 0 0 3px rgba(0,229,149,.2);
}
.footer-subscribe .btn{height:42px;padding:0 20px;font-size:14px}
.footer-bottom{
  border-top:1px solid var(--color-border);
  padding:20px 0;
  color:var(--color-text-muted);
  font-size:13px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
}
.footer-bottom a{color:var(--color-text-muted);text-decoration:none;transition:color .2s}
.footer-bottom a:hover{color:var(--color-primary)}
/* ===== 响应式 ===== */
@media (max-width:1024px){
  .article-title{font-size:36px}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .article-card-wrap{padding:40px 36px}
}
@media (max-width:768px){
  .nav-toggle{display:block}
  .nav-menu{
    position:fixed;
    top:72px;
    left:0;right:0;
    flex-direction:column;
    background:rgba(11,13,18,.98);
    border-bottom:1px solid var(--color-border);
    padding:12px 20px 20px;
    gap:0;
    display:none;
    max-height:calc(100vh - 72px);
    overflow-y:auto;
    box-shadow:0 16px 40px rgba(0,0,0,.6);
  }
  .nav-menu.open{display:flex}
  .nav-menu li{width:100%}
  .nav-menu a{
    display:block;
    padding:14px 8px;
    font-size:16px;
    border-bottom:1px solid rgba(42,48,64,.6);
  }
  .nav-menu a.active::after{display:none}
  .nav-menu a.active{background:rgba(0,229,149,.06)}
  .article-banner{padding:48px 0 40px}
  .article-title{font-size:30px}
  .article-meta{gap:12px;flex-wrap:wrap}
  .article-card-wrap{padding:28px 20px;border-radius:14px}
  .article-section{padding:48px 0}
  .related-grid{grid-template-columns:1fr}
  .article-cta{padding:56px 0}
  .cta-box{padding:40px 24px}
  .cta-box h2{font-size:26px}
  .footer{padding-top:48px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px 24px}
}
@media (max-width:520px){
  .grid-container{padding-left:16px;padding-right:16px}
  .article-title{font-size:26px}
  .article-card-wrap{padding:20px 16px}
  .article-body{font-size:16px;line-height:1.85}
  .article-body h2{font-size:23px}
  .article-body h3{font-size:20px}
  .article-pager{grid-template-columns:1fr}
  .pager-next{text-align:left}
  .footer-grid{grid-template-columns:1fr}
  .footer-subscribe{flex-direction:column}
  .footer-subscribe .btn{width:100%}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}