/* roulang page: index */
:root {
  --bg-deep: #070A10;
  --bg-raise: #0D1219;
  --glass-bg: rgba(22, 29, 37, 0.56);
  --glass-edge: inset 0 1px 0 rgba(255, 255, 255, 0.06);
  --brand: #8BC34A;
  --brand-light: #B4E05C;
  --brand-dark: #5F8F2E;
  --energy: #FF7847;
  --highlight: #F4C74A;
  --text-hi: #EDF1F6;
  --text-mid: #A3AEBC;
  --text-low: #6B7684;
  --line: rgba(255, 255, 255, 0.09);
  --glow: 0 0 24px rgba(139, 195, 74, 0.45);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --container: 1200px;
  --shadow-card: 0 12px 30px rgba(0, 0, 0, 0.28);
  --transition: all 0.2s ease;
}
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  font-size: 16px;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  background-color: var(--bg-deep);
  color: var(--text-hi);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
ul,
ol {
  list-style: none;
}
button,
input {
  font: inherit;
  border: none;
  outline: none;
  background: none;
}
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.py-section {
  padding: 96px 0;
  position: relative;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.22s ease;
  white-space: nowrap;
}
.btn svg {
  width: 18px;
  height: 18px;
  transition: transform 0.2s ease;
}
.btn:hover svg {
  transform: translateX(4px);
}
.btn-primary {
  background: var(--brand);
  color: #080C11;
  box-shadow: 0 0 18px rgba(139, 195, 74, 0.25);
}
.btn-primary:hover {
  background: var(--brand-light);
  transform: translateY(-2px);
  box-shadow: var(--glow);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-hi);
  border: 1px solid rgba(255, 255, 255, 0.18);
}
.btn-ghost:hover {
  border-color: var(--brand);
  background: rgba(139, 195, 74, 0.08);
  color: var(--brand-light);
}
.btn-ghost:active {
  transform: translateY(1px);
}
.btn:focus-visible,
.nav-toggle:focus-visible,
a:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--brand-light);
  outline-offset: 3px;
}

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 10px;
  border-radius: 99px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: #C9D1DE;
  background: rgba(255, 255, 255, 0.04);
  line-height: 1;
  white-space: nowrap;
}
.tag-hot {
  border-color: rgba(255, 120, 71, 0.5);
  color: var(--energy);
  background: rgba(255, 120, 71, 0.1);
}
.tag-green {
  border-color: rgba(139, 195, 74, 0.4);
  color: var(--brand-light);
  background: rgba(139, 195, 74, 0.08);
}

/* ======= 吸顶导航 ======= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: linear-gradient(180deg, rgba(7, 10, 16, 0.96) 0%, rgba(7, 10, 16, 0.86) 100%);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: background 0.3s ease;
}
.header-top {
  height: 72px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: height 0.3s ease, opacity 0.25s ease;
  overflow: hidden;
}
.header-top-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 0.01em;
  flex-shrink: 0;
  transition: opacity 0.25s;
}
.brand svg {
  width: 34px;
  height: 34px;
}
.header-top-note {
  color: var(--text-low);
  font-size: 14px;
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}
.header-top-note::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 10px var(--brand);
}
.navbar {
  height: 54px;
  border-bottom: 1px solid var(--line);
  transition: background 0.3s ease;
}
.navbar .container {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 18px;
}
.mini-brand {
  display: inline-flex;
  align-items: center;
  font-weight: 800;
  font-size: 16px;
  color: var(--brand-light);
  white-space: nowrap;
  max-width: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-width 0.3s ease, opacity 0.18s ease, margin-right 0.3s ease;
}
.site-header.is-scrolled .mini-brand {
  max-width: 190px;
  opacity: 1;
  margin-right: 8px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-right: auto;
}
.nav-links a {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: 38px;
  padding: 0 16px;
  border-radius: 8px;
  color: var(--text-mid);
  font-size: 15px;
  font-weight: 600;
  transition: color 0.2s ease, background 0.2s ease;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 0;
  height: 2px;
  background: var(--brand);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s ease;
}
.nav-links a:hover {
  color: var(--brand-light);
}
.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}
.nav-links a.active {
  color: var(--brand-light);
  background: rgba(139, 195, 74, 0.1);
}
.search-form {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  height: 38px;
  padding: 0 12px;
  color: var(--text-low);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  flex-shrink: 0;
}
.search-form svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  stroke: var(--text-low);
  transition: stroke 0.2s ease;
}
.search-form input {
  width: 160px;
  color: var(--text-hi);
  font-size: 14px;
  background: transparent;
}
.search-form input::placeholder {
  color: #6E7888;
}
.search-form:focus-within {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(139, 195, 74, 0.12);
}
.search-form:focus-within svg {
  stroke: var(--brand);
}
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-mid);
  margin: 3px auto;
  border-radius: 2px;
  transition: all 0.24s ease;
}
.nav-open .nav-toggle span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.nav-open .nav-toggle span:nth-child(2) {
  opacity: 0;
}
.nav-open .nav-toggle span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ======= Hero ======= */
.hero {
  position: relative;
  padding: 96px 0 96px;
  background:
    linear-gradient(180deg, rgba(7, 10, 16, 0.55) 0%, rgba(7, 10, 16, 0.86) 78%),
    url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 75% 40%, rgba(139, 195, 74, 0.12) 0%, transparent 52%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 72px;
  align-items: center;
  min-height: 600px;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 28px;
  padding: 0 14px;
  border-radius: 99px;
  background: rgba(139, 195, 74, 0.12);
  border: 1px solid rgba(139, 195, 74, 0.35);
  color: var(--brand-light);
  font-size: 13px;
  font-weight: 600;
}
.hero-tag svg {
  width: 13px;
  height: 13px;
}
.hero h1 {
  margin-top: 24px;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #FFFFFF;
}
.hero h1 em {
  font-style: normal;
  color: var(--brand-light);
}
.hero-lead {
  margin-top: 20px;
  font-size: 18px;
  line-height: 1.8;
  color: var(--text-mid);
  max-width: 540px;
}
.hero-cta {
  margin-top: 38px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.hero-visual {
  position: relative;
}
.hero-visual img {
  width: 100%;
  border-radius: 18px;
  object-fit: cover;
  aspect-ratio: 4 / 3;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(139, 195, 74, 0.28);
}
.hero-visual::after {
  content: "";
  position: absolute;
  inset: 20px -20px -20px 20px;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(139, 195, 74, 0.25), transparent 55%);
  z-index: -1;
}
.hero-visual-badge {
  position: absolute;
  left: -18px;
  bottom: 30px;
  height: 40px;
  padding: 0 16px;
  border-radius: 10px;
  background: var(--bg-raise);
  border: 1px solid rgba(139, 195, 74, 0.45);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 14px;
  box-shadow: var(--shadow-card);
}
.hero-visual-badge i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 10px var(--brand);
}

/* ======= 价值主张区 ======= */
.value-props {
  background: var(--bg-raise);
}
.section-label {
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--brand);
  text-transform: uppercase;
}
.section-title {
  margin-top: 12px;
  font-size: clamp(28px, 3vw, 38px);
  font-weight: 800;
  line-height: 1.3;
}
.section-sub {
  margin-top: 12px;
  color: var(--text-mid);
  max-width: 620px;
  line-height: 1.8;
}
.value-props-head {
  margin-bottom: 64px;
}
.value-list {
  border-top: 1px solid var(--line);
}
.value-row {
  display: grid;
  grid-template-columns: 100px 230px 1fr 40px;
  gap: 24px;
  align-items: center;
  padding: 30px 10px;
  border-bottom: 1px solid var(--line);
  transition: background-color 0.22s ease;
}
.value-row:hover {
  background: rgba(255, 255, 255, 0.02);
}
.value-num {
  position: relative;
  font-size: 40px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  color: rgba(139, 195, 74, 0.16);
  line-height: 1;
  transition: color 0.22s ease;
}
.value-row:hover .value-num {
  color: rgba(139, 195, 74, 0.75);
}
.value-title {
  font-size: 22px;
  font-weight: 750;
  color: #fff;
}
.value-desc {
  color: var(--text-mid);
  line-height: 1.7;
  font-size: 15px;
}
.value-arrow {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  color: var(--text-low);
  transition: all 0.22s ease;
}
.value-row:hover .value-arrow {
  border-color: var(--brand);
  color: var(--brand-light);
  transform: translateX(3px);
}

/* ======= 功能分组区 ======= */
.features {
  background: var(--bg-deep);
}
.features-wrap {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.4fr);
  gap: 56px;
}
.features-intro {
  position: sticky;
  top: 100px;
  align-self: start;
}
.features-intro .btn {
  margin-top: 28px;
}
.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.feature-card {
  position: relative;
  background: var(--glass-bg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 26px;
  overflow: hidden;
  min-height: 210px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  box-shadow: var(--shadow-card);
  transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(139, 195, 74, 0.5);
  box-shadow: 0 20px 44px rgba(0, 0, 0, 0.35), 0 0 18px rgba(139, 195, 74, 0.08);
}
.feature-card.large {
  grid-row: span 2;
  min-height: 440px;
  padding: 0;
}
.large .feature-cover {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}
.large .feature-content {
  position: relative;
  z-index: 2;
  padding: 156px 26px 26px;
  background: linear-gradient(180deg, transparent 0%, rgba(5, 8, 14, 0.88) 76%);
}
.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(139, 195, 74, 0.14);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: auto;
}
.feature-icon svg {
  width: 22px;
  height: 22px;
  stroke: var(--brand-light);
}
.feature-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-top: 12px;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-mid);
  margin-top: 8px;
  line-height: 1.65;
}
.feature-link {
  margin-top: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--brand-light);
}
.feature-link svg {
  width: 15px;
  height: 15px;
  transition: transform 0.2s ease;
}
.feature-card:hover .feature-link svg {
  transform: translateX(4px);
}

/* ======= 最新资讯 CMS ======= */
.news-section {
  background: var(--bg-raise);
}
.news-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 48px;
}
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}
.news-item {
  display: flex;
  flex-direction: column;
  background: var(--glass-bg);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-md);
  padding: 24px;
  min-height: 150px;
  transition: border-color 0.22s ease, transform 0.22s ease, background 0.22s ease;
}
.news-item:hover {
  border-color: rgba(139, 195, 74, 0.45);
  transform: translateY(-2px);
  background: rgba(28, 36, 46, 0.7);
}
.news-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}
.news-topline time {
  color: var(--text-low);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.news-item h3 {
  margin-top: 16px;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
}
.news-item h3 a {
  transition: color 0.2s ease;
}
.news-item h3 a:hover {
  color: var(--brand-light);
}
.news-excerpt {
  margin-top: 10px;
  color: var(--text-mid);
  font-size: 14px;
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-more {
  margin-top: auto;
  padding-top: 14px;
  color: var(--brand-light);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
}
.news-more svg {
  width: 15px;
  height: 15px;
  transition: transform 0.2s ease;
}
.news-more:hover svg {
  transform: translateX(4px);
}
.news-empty {
  border: 1px dashed rgba(255, 255, 255, 0.16);
  border-radius: 14px;
  padding: 56px 20px;
  text-align: center;
  color: var(--text-low);
  font-size: 16px;
  grid-column: 1 / -1;
}

/* ======= 使用场景区 ======= */
.scenario {
  background: var(--bg-deep);
  overflow: hidden;
}
.scenario-inner {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 60px;
  align-items: center;
}
.scenario-visual {
  position: relative;
}
.scenario-visual-img {
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow-card);
}
.scenario-visual-img img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}
.scenario-list {
  position: relative;
  padding-left: 10px;
}
.scenario-list::before {
  content: "";
  position: absolute;
  left: 26px;
  top: 24px;
  bottom: 24px;
  width: 1px;
  background: linear-gradient(180deg, rgba(139, 195, 74, 0.45), rgba(255, 255, 255, 0.08));
}
.scenario-node {
  position: relative;
  padding: 22px 0 22px 76px;
}
.scenario-marker {
  position: absolute;
  left: 12px;
  top: 28px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg-deep);
  border: 1px solid rgba(255, 255, 255, 0.14);
  display: flex;
  align-items: center;
  justify-content: center;
}
.scenario-marker::after {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 12px var(--brand);
  transition: background 0.2s ease;
}
.scenario-node h3 {
  font-size: 20px;
  font-weight: 700;
}
.scenario-node .node-sub {
  color: var(--brand);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 4px;
}
.scenario-node p {
  color: var(--text-mid);
  margin-top: 8px;
  font-size: 15px;
  max-width: 460px;
}

/* ======= 平台标准区 ======= */
.standards {
  background: var(--bg-raise);
}
.standards-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 64px;
  align-items: center;
}
.standards-title {
  position: relative;
}
.standards-list {
  display: grid;
  gap: 18px;
}
.std-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.025);
  border-radius: 14px;
  padding: 20px;
  transition: border-color 0.22s ease, transform 0.22s ease;
}
.std-item:hover {
  border-color: rgba(139, 195, 74, 0.35);
  transform: translateX(4px);
}
.std-number {
  font-size: 22px;
  font-weight: 800;
  color: var(--brand);
  font-variant-numeric: tabular-nums;
  line-height: 1;
  padding-top: 4px;
}
.std-item h3 {
  font-size: 18px;
  font-weight: 700;
}
.std-item p {
  font-size: 14px;
  color: var(--text-mid);
  margin-top: 6px;
}

/* ======= 价格方案区 ======= */
.pricing {
  background: var(--bg-deep);
}
.pricing .section-head {
  text-align: center;
}
.pricing .section-head .section-sub {
  margin-left: auto;
  margin-right: auto;
}
.pricing-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.2fr;
  gap: 28px;
  align-items: stretch;
  max-width: 980px;
  margin: 56px auto 0;
}
.plan {
  background: var(--glass-bg);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 18px;
  padding: 34px;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-card);
  transition: transform 0.24s ease, border-color 0.24s ease;
}
.plan:hover {
  transform: translateY(-4px);
}
.plan.featured {
  border: 1px solid rgba(139, 195, 74, 0.6);
  background: rgba(22, 29, 37, 0.74);
  box-shadow: var(--glow);
}
.plan-label {
  font-size: 18px;
  font-weight: 700;
}
.plan-tag {
  position: absolute;
  top: -12px;
  right: 24px;
  height: 26px;
  background: var(--brand);
  color: #080C11;
  padding: 0 14px;
  border-radius: 99px;
  font-size: 12px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
}
.plan-price {
  margin-top: 20px;
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.plan-price strong {
  font-size: 46px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.plan-price span {
  color: var(--text-low);
  font-size: 14px;
}
.plan-desc {
  color: var(--text-mid);
  font-size: 14px;
  margin-top: 8px;
}
.plan-features {
  margin: 26px 0 32px;
  display: grid;
  gap: 12px;
}
.plan-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: #C4CCD8;
  font-size: 15px;
  line-height: 1.6;
}
.plan-features svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 3px;
}
.plan .btn {
  width: 100%;
}

/* ======= FAQ + CTA ======= */
.faq-cta {
  background: var(--bg-raise);
}
.faq-wrap {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.3fr);
  gap: 64px;
  align-items: start;
}
.faq-intro {
  position: sticky;
  top: 100px;
}
.faq-list {
  border-top: 1px solid var(--line);
}
details {
  border-bottom: 1px solid var(--line);
}
summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 17px;
  font-weight: 700;
  padding: 22px 0;
  cursor: pointer;
  list-style: none;
  transition: color 0.2s ease;
}
summary::-webkit-details-marker {
  display: none;
}
summary:hover {
  color: var(--brand-light);
}
.summary-icon {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s ease;
  flex-shrink: 0;
}
.summary-icon::before,
.summary-icon::after {
  content: "";
  position: absolute;
  background: currentColor;
}
details[open] .summary-icon {
  background: rgba(139, 195, 74, 0.14);
  color: var(--brand-light);
  transform: rotate(45deg);
}
summary .summary-icon {
  position: relative;
  font-size: 22px;
  color: var(--text-mid);
}
.summary-icon::before {
  width: 12px;
  height: 2px;
}
.summary-icon::after {
  width: 2px;
  height: 12px;
}
.faq-answer {
  padding: 0 54px 24px 0;
  color: var(--text-mid);
  font-size: 15px;
  line-height: 1.8;
}

/* CTA面板 */
.cta-panel {
  margin-top: 80px;
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  padding: 56px 60px;
  background:
    radial-gradient(ellipse at 78% 50%, rgba(139, 195, 74, 0.2), transparent 46%),
    linear-gradient(120deg, rgba(13, 18, 25, 0.95), rgba(7, 10, 16, 0.9)),
    url('/assets/images/backpic/back-2.png') center / cover no-repeat;
  border: 1px solid rgba(139, 195, 74, 0.24);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}
.cta-panel h2 {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.4;
}
.cta-panel p {
  color: var(--text-mid);
  margin-top: 10px;
  max-width: 560px;
}
.cta-actions {
  display: flex;
  gap: 14px;
  margin-top: 24px;
}

/* ======= 页脚 ======= */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--bg-deep);
  padding-top: 68px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 44px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--line);
}
.footer-brand .brand {
  font-size: 20px;
}
.footer-about {
  margin-top: 14px;
  color: var(--text-low);
  font-size: 14px;
  line-height: 1.8;
  max-width: 320px;
}
.footer-col-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-hi);
  margin-bottom: 18px;
}
.footer-col a {
  display: inline-flex;
  color: var(--text-low);
  font-size: 14px;
  margin-bottom: 10px;
  transition: color 0.2s ease, transform 0.2s ease;
}
.footer-col a:hover {
  color: var(--brand-light);
  transform: translateX(3px);
}
.footer-contact li {
  color: var(--text-low);
  font-size: 14px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 82px;
  padding: 16px 0;
  color: var(--text-low);
  font-size: 13px;
  flex-wrap: wrap;
}

/* ======= 响应式 ======= */
@media (max-width: 1024px) {
  .hero-inner {
    gap: 40px;
    min-height: 0;
  }
  .features-wrap {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .features-intro {
    position: static;
  }
  .scenario-inner,
  .standards-grid,
  .faq-wrap {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .faq-intro {
    position: static;
  }
  .value-row {
    grid-template-columns: 70px 180px 1fr 24px;
  }
}
@media (max-width: 860px) {
  .header-top {
    height: 64px;
  }
  .header-top-note {
    display: none;
  }
  .navbar {
    height: 58px;
  }
  .navbar .container {
    justify-content: space-between;
  }
  .mini-brand {
    max-width: 160px;
    opacity: 1;
    margin-right: 0;
  }
  .search-form {
    display: none;
  }
  .nav-links {
    display: none;
  }
  .nav-toggle {
    display: inline-flex;
  }
  body.menu-open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 58px;
    left: 0;
    right: 0;
    background: rgba(7, 10, 16, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding: 20px 24px 28px;
    gap: 8px;
    box-shadow: 0 16px 24px rgba(0, 0, 0, 0.28);
    z-index: 999;
  }
  body.menu-open .nav-links a,
  body.menu-open .nav-links a.active {
    display: flex;
    height: 48px;
    align-items: center;
    border-radius: 10px;
  }
  .nav-links a::after {
    display: none;
  }
  .value-props-head {
    margin-bottom: 40px;
  }
  .py-section {
    padding: 72px 0;
  }
}
@media (max-width: 768px) {
  .container {
    padding: 0 18px;
  }
  .hero {
    padding: 56px 0 68px;
  }
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 44px;
  }
  .hero h1 {
    font-size: 32px;
  }
  .hero-lead {
    font-size: 16px;
  }
  .hero-cta .btn {
    width: 100%;
  }
  .hero-visual-badge {
    left: 14px;
    bottom: 14px;
  }
  .value-row {
    grid-template-columns: 1fr 1fr;
    grid-template-areas:
      "num title"
      "desc desc"
      "arrow arrow";
    padding: 22px 0;
    gap: 10px 18px;
  }
  .value-num {
    grid-area: num;
    font-size: 30px;
  }
  .value-title {
    grid-area: title;
    font-size: 18px;
  }
  .value-desc {
    grid-area: desc;
    font-size: 14px;
  }
  .value-arrow {
    grid-area: arrow;
    display: none;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .feature-card.large {
    grid-row: auto;
    min-height: 360px;
  }
  .news-grid {
    grid-template-columns: 1fr;
  }
  .news-head {
    flex-direction: column;
    align-items: flex-start;
    margin-bottom: 32px;
  }
  .standards-grid,
  .faq-wrap {
    gap: 32px;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    gap: 22px;
    margin-top: 40px;
  }
  .cta-panel {
    padding: 32px 24px;
    align-items: flex-start;
    margin-top: 56px;
  }
  .cta-actions {
    width: 100%;
    flex-direction: column;
  }
  .cta-actions .btn {
    width: 100%;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px 24px;
  }
  .py-section {
    padding: 56px 0;
  }
}
@media (max-width: 520px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    justify-content: center;
    text-align: center;
  }
  .btn {
    padding: 0 18px;
  }
  .hero-tag {
    height: 26px;
    font-size: 12px;
  }
}

/* roulang page: article */
:root {
    --bg-deep: #070A10;
    --bg-raise: #0D1219;
    --glass-bg: rgba(22, 29, 37, 0.56);
    --glass-edge: inset 0 1px 0 rgba(255, 255, 255, 0.06);
    --brand: #8BC34A;
    --brand-light: #B4E05C;
    --brand-dark: #5F8F2E;
    --energy: #FF7847;
    --highlight: #F4C74A;
    --text-hi: #EDF1F6;
    --text-mid: #A3AEBC;
    --text-low: #6B7684;
    --line: rgba(255, 255, 255, 0.09);
    --glow: 0 0 24px rgba(139, 195, 74, 0.45);
    --radius-lg: 18px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --shadow-deep: 0 18px 40px rgba(0, 0, 0, 0.28);
    --font-base: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans CJK SC", system-ui, "Segoe UI", sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg-deep);
    color: var(--text-hi);
    font-family: var(--font-base);
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background:
        radial-gradient(900px 360px at 80% -10%, rgba(139, 195, 74, 0.14), transparent 60%),
        radial-gradient(700px 320px at 0% 20%, rgba(139, 195, 74, 0.06), transparent 55%),
        var(--bg-deep);
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

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

button,
input {
    font: inherit;
    color: inherit;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(7, 10, 16, 0.82);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: background 0.24s ease;
}

.site-header.is-compact .header-top {
    height: 0;
    opacity: 0;
    overflow: hidden;
    pointer-events: none;
}

.header-top {
    overflow: hidden;
    transition: height 0.24s ease, opacity 0.24s ease;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.header-top-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 22px;
    min-height: 62px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--text-hi);
    font-weight: 800;
    font-size: 19px;
    letter-spacing: 0.02em;
    line-height: 1.2;
    white-space: nowrap;
}

.brand svg {
    width: 36px;
    height: 36px;
    flex: 0 0 auto;
}

.brand:hover {
    color: var(--brand-light);
}

.header-top-note {
    color: var(--text-mid);
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.navbar {
    width: 100%;
    transition: background 0.2s ease;
}

.navbar .container {
    display: flex;
    align-items: center;
    gap: 14px;
    min-height: 58px;
    flex-wrap: nowrap;
    position: relative;
}

.mini-brand {
    display: none;
    align-items: center;
    font-weight: 800;
    font-size: 17px;
    color: var(--text-hi);
    white-space: nowrap;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-links a {
    position: relative;
    display: inline-flex;
    align-items: center;
    padding: 10px 14px;
    color: var(--text-mid);
    font-weight: 600;
    font-size: 15px;
    border-radius: 8px;
    transition: color 0.2s ease, background 0.2s ease;
}

.nav-links a::after {
    content: "";
    position: absolute;
    left: 14px;
    right: 14px;
    bottom: 4px;
    height: 2px;
    border-radius: 2px;
    background: var(--brand);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.2s ease;
}

.nav-links a:hover {
    color: var(--brand-light);
    background: rgba(139, 195, 74, 0.08);
}

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

.nav-links a.active {
    color: var(--brand-light);
    background: rgba(139, 195, 74, 0.1);
}

.search-form {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
    padding: 0 12px;
    height: 38px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.04);
    border-radius: 999px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-form:focus-within {
    border-color: var(--brand);
    box-shadow: 0 0 0 3px rgba(139, 195, 74, 0.16);
}

.search-form svg {
    width: 16px;
    height: 16px;
    color: var(--text-low);
    flex: 0 0 auto;
}

.search-form input {
    width: 178px;
    border: 0;
    outline: 0;
    background: transparent;
    color: var(--text-hi);
    font-size: 14px;
    line-height: 1.4;
}

.search-form input::placeholder {
    color: var(--text-low);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    align-items: center;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.04);
    border-radius: 10px;
    cursor: pointer;
    outline: none;
}

.nav-toggle:focus-visible {
    border-color: var(--brand);
    box-shadow: 0 0 0 3px rgba(139, 195, 74, 0.2);
}

.nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--text-hi);
    border-radius: 2px;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

main {
    min-height: 70vh;
}

.article-page-lead {
    position: relative;
    padding: 52px 0 30px;
    background-image:
        linear-gradient(90deg, rgba(7, 10, 16, 0.94) 0%, rgba(7, 10, 16, 0.74) 60%, rgba(7, 10, 16, 0.7) 100%),
        url("/assets/images/backpic/back-1.webp");
    background-position: center;
    background-size: cover;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.article-page-lead .container {
    max-width: 1060px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    color: var(--text-low);
    font-size: 14px;
    margin-bottom: 28px;
}

.breadcrumb a {
    color: var(--text-mid);
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

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

.breadcrumb .divider {
    color: rgba(255, 255, 255, 0.18);
}

.breadcrumb .current {
    color: var(--text-mid);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 280px;
}

.article-lead-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 13px;
    border-radius: 999px;
    border: 1px solid rgba(139, 195, 74, 0.36);
    background: rgba(139, 195, 74, 0.1);
    color: var(--brand-light);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.article-lead-text {
    margin-top: 14px;
    max-width: 680px;
    color: var(--text-mid);
    font-size: 17px;
    line-height: 1.8;
}

.article-main-section {
    padding: 48px 0 30px;
}

.article-main-section .container {
    max-width: 1060px;
}

.article-paper {
    background:
        linear-gradient(155deg, rgba(255, 255, 255, 0.035), transparent 30%),
        var(--bg-raise);
    border: 1px solid rgba(255, 255, 255, 0.09);
    box-shadow: var(--shadow-deep), var(--glass-edge);
    border-radius: 22px;
    overflow: hidden;
}

.article-paper-head {
    padding: 44px 56px 8px;
}

.article-kicker {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 18px;
}

.article-kicker .tag {
    display: inline-flex;
    align-items: center;
    max-height: 26px;
    padding: 4px 12px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    color: var(--text-mid);
    border-radius: 999px;
    font-size: 13px;
    line-height: 1.4;
}

.article-kicker .tag-solid {
    border-color: transparent;
    background: rgba(139, 195, 74, 0.16);
    color: var(--brand-light);
}

.article-paper h1 {
    max-width: 920px;
    color: var(--text-hi);
    font-size: clamp(28px, 4.5vw, 46px);
    font-weight: 800;
    line-height: 1.32;
    letter-spacing: -0.015em;
    margin-bottom: 20px;
}

.article-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    color: var(--text-low);
    font-size: 14px;
    gap: 8px 22px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.article-meta span {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    white-space: nowrap;
}

.article-meta svg {
    width: 15px;
    height: 15px;
    color: var(--text-low);
    opacity: 0.8;
}

.article-cover {
    margin: 28px 56px 0;
}

.article-cover img {
    width: 100%;
    aspect-ratio: 16 / 7;
    object-fit: cover;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.article-content {
    max-width: 780px;
    margin: 38px auto 0;
    padding: 0 56px 52px;
    color: var(--text-hi);
    font-size: 16px;
    line-height: 1.9;
    word-break: break-word;
}

.article-content p {
    margin: 0 0 1.5em;
    color: #C8D0DA;
}

.article-content h2,
.article-content h3,
.article-content h4 {
    color: var(--text-hi);
    line-height: 1.45;
    font-weight: 750;
}

.article-content h2 {
    font-size: clamp(22px, 3vw, 30px);
    margin: 2.2em 0 0.85em;
    padding-left: 17px;
    position: relative;
}

.article-content h2::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.18em;
    bottom: 0.18em;
    width: 4px;
    border-radius: 4px;
    background: linear-gradient(180deg, var(--brand-light), var(--brand-dark));
    box-shadow: 0 0 12px rgba(139, 195, 74, 0.4);
}

.article-content h3 {
    font-size: 21px;
    margin: 1.9em 0 0.7em;
    color: var(--brand-light);
}

.article-content h4 {
    font-size: 17px;
    margin: 1.6em 0 0.55em;
}

.article-content a {
    color: var(--brand-light);
    text-decoration: underline;
    text-decoration-color: rgba(139, 195, 74, 0.4);
    text-underline-offset: 4px;
}

.article-content a:hover {
    color: var(--brand-light);
    text-decoration-color: var(--brand-light);
}

.article-content strong {
    color: var(--text-hi);
    font-weight: 700;
}

.article-content ul,
.article-content ol {
    margin: 0 0 1.6em;
    padding-left: 1.6em;
    color: #C8D0DA;
}

.article-content ul li,
.article-content ol li {
    margin-bottom: 0.45em;
}

.article-content blockquote {
    margin: 2em 0;
    padding: 18px 24px;
    border-left: 3px solid var(--brand);
    background: rgba(255, 255, 255, 0.045);
    border-radius: 0 12px 12px 0;
    color: #CFD7E2;
    font-size: 17px;
    line-height: 1.85;
}

.article-content blockquote p {
    margin-bottom: 0;
}

.article-content pre {
    margin: 1.8em 0;
    padding: 18px 20px;
    border-radius: 12px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--line);
    border-left: 3px solid var(--brand);
    overflow-x: auto;
    color: #D8E0E0;
    font-size: 14px;
    line-height: 1.7;
}

.article-content img {
    max-width: 100%;
    border-radius: 12px;
    margin: 2em 0;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.article-content hr {
    margin: 2.5em 0;
    border: 0;
    height: 1px;
    background: var(--line);
}

.article-content table {
    width: 100%;
    margin: 1.8em 0;
    border-collapse: collapse;
    font-size: 15px;
}

.article-content th {
    text-align: left;
    background: rgba(139, 195, 74, 0.08);
    color: var(--brand-light);
}

.article-content th,
.article-content td {
    padding: 10px 12px;
    border: 1px solid var(--line);
}

.article-empty {
    min-height: 340px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 22px;
    border: 1px dashed rgba(255, 255, 255, 0.18);
    border-radius: 18px;
    background: rgba(13, 18, 25, 0.65);
    text-align: center;
    padding: 40px 24px;
}

.article-empty h1 {
    font-size: 32px;
    font-weight: 800;
    color: var(--text-hi);
}

.article-empty .btn {
    margin-top: 6px;
}

.article-paper-bottom {
    max-width: 780px;
    margin: 0 auto;
    padding: 0 56px 48px;
}

.article-divider {
    height: 1px;
    background: var(--line);
    margin-bottom: 28px;
}

.article-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 46px;
    padding: 0 22px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 15px;
    line-height: 1;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform 0.18s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    white-space: nowrap;
}

.btn svg {
    width: 16px;
    height: 16px;
}

.btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(139, 195, 74, 0.28);
}

.btn-primary {
    background: var(--brand);
    color: #080C11;
}

.btn-primary:hover {
    background: var(--brand-light);
    transform: translateY(-2px);
    box-shadow: var(--glow);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: none;
}

.btn-ghost {
    background: rgba(255, 255, 255, 0.035);
    border-color: rgba(255, 255, 255, 0.16);
    color: var(--text-hi);
}

.btn-ghost:hover {
    border-color: var(--brand);
    color: var(--brand-light);
    background: rgba(139, 195, 74, 0.08);
}

.btn-ghost:active {
    background: rgba(139, 195, 74, 0.12);
    color: var(--brand-light);
    transform: translateY(1px);
}

.btn svg.arrow-right {
    transition: transform 0.2s ease;
}

.btn:hover svg.arrow-right {
    transform: translateX(3px);
}

.recommend-section {
    padding: 20px 0 70px;
}

.recommend-section .container {
    max-width: 1120px;
}

.section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 24px;
}

.section-head h2 {
    font-size: clamp(24px, 3vw, 34px);
    font-weight: 750;
    line-height: 1.3;
    color: var(--text-hi);
}

.section-head .subline {
    color: var(--text-low);
    font-size: 14px;
}

.recommend-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.recommend-card {
    position: relative;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--line);
    background: var(--glass-bg);
    border-radius: 16px;
    padding: 26px 24px;
    transition: border-color 0.22s ease, transform 0.22s ease, box-shadow 0.22s ease;
}

.recommend-card::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    pointer-events: none;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.recommend-card:hover {
    border-color: rgba(139, 195, 74, 0.55);
    transform: translateY(-4px);
    box-shadow: 0 16px 34px rgba(0, 0, 0, 0.26), 0 0 24px rgba(139, 195, 74, 0.12);
}

.recommend-card-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(139, 195, 74, 0.14);
    border: 1px solid rgba(139, 195, 74, 0.24);
    color: var(--brand);
    margin-bottom: 18px;
}

.recommend-card-icon svg {
    width: 21px;
    height: 21px;
}

.recommend-card h3 {
    font-size: 19px;
    font-weight: 700;
    color: var(--text-hi);
    margin-bottom: 8px;
}

.recommend-card p {
    color: var(--text-mid);
    font-size: 14px;
    line-height: 1.75;
    margin-bottom: 18px;
}

.recommend-link {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--brand-light);
    font-size: 14px;
    font-weight: 600;
}

.recommend-link svg {
    width: 15px;
    height: 15px;
    transition: transform 0.18s ease;
}

.recommend-link:hover svg {
    transform: translateX(3px);
}

.faq-section {
    padding: 60px 0 30px;
}

.faq-wrap {
    display: grid;
    grid-template-columns: 0.9fr 1.4fr;
    gap: 46px;
    align-items: start;
}

.faq-intro h2 {
    font-size: clamp(26px, 3vw, 34px);
    font-weight: 800;
    line-height: 1.3;
    color: var(--text-hi);
    margin-bottom: 12px;
}

.faq-intro p {
    color: var(--text-mid);
    max-width: 360px;
    font-size: 15px;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--glass-bg);
    border: 1px solid var(--line);
    border-radius: 14px;
    overflow: hidden;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.faq-item:hover {
    border-color: rgba(255, 255, 255, 0.16);
}

.faq-item[open] {
    border-color: rgba(139, 195, 74, 0.4);
    box-shadow: 0 0 0 1px rgba(139, 195, 74, 0.08), 0 10px 22px rgba(0, 0, 0, 0.2);
}

.faq-item summary {
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    width: 100%;
    padding: 18px 20px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 650;
    color: var(--text-hi);
    line-height: 1.5;
    user-select: none;
    transition: color 0.2s ease;
}

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

.faq-item summary:hover {
    color: var(--brand-light);
}

.faq-icon {
    display: grid;
    width: 26px;
    height: 26px;
    place-items: center;
    color: var(--brand);
    border: 1px solid rgba(139, 195, 74, 0.32);
    border-radius: 8px;
    background: rgba(139, 195, 74, 0.1);
    flex: 0 0 auto;
    transition: transform 0.24s ease;
}

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

.faq-icon svg {
    width: 14px;
    height: 14px;
}

.faq-body {
    padding: 0 20px 18px 20px;
    color: var(--text-mid);
    font-size: 15px;
    line-height: 1.8;
}

.cta-section {
    padding: 50px 0 80px;
}

.cta-panel {
    position: relative;
    overflow: hidden;
    padding: 46px 48px;
    border-radius: 20px;
    background:
        radial-gradient(520px 220px at 78% 80%, rgba(139, 195, 74, 0.22), transparent 70%),
        rgba(17, 24, 31, 0.92);
    border: 1px solid rgba(139, 195, 74, 0.34);
    box-shadow: 0 22px 44px rgba(0, 0, 0, 0.24), 0 0 34px rgba(139, 195, 74, 0.12);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
}

.cta-panel::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        linear-gradient(115deg, rgba(139, 195, 74, 0.05) 30%, transparent 70%);
    pointer-events: none;
}

.cta-copy {
    position: relative;
}

.cta-copy h2 {
    font-size: clamp(23px, 3vw, 32px);
    font-weight: 800;
    color: var(--text-hi);
    line-height: 1.35;
    margin-bottom: 10px;
}

.cta-copy p {
    color: var(--text-mid);
    font-size: 15px;
}

.cta-action {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    position: relative;
    flex: 0 0 auto;
}

.site-footer {
    background: #06090F;
    border-top: 1px solid rgba(139, 195, 74, 0.2);
    padding: 48px 0 34px;
    margin-top: 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 0.7fr 0.7fr 1fr;
    gap: 36px;
    margin-bottom: 36px;
}

.footer-brand .brand {
    font-size: 19px;
    margin-bottom: 16px;
}

.footer-about {
    max-width: 380px;
    color: var(--text-low);
    font-size: 14px;
    line-height: 1.8;
}

.footer-col-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-hi);
    margin-bottom: 14px;
}

.footer-col {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 9px;
}

.footer-col a {
    color: var(--text-mid);
    font-size: 14px;
    line-height: 1.7;
    display: inline-flex;
    gap: 5px;
}

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

.footer-contact {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 9px;
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 7px;
    font-size: 14px;
    color: var(--text-mid);
    line-height: 1.7;
}

.footer-contact svg {
    margin-top: 5px;
    color: var(--brand);
    flex: 0 0 auto;
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.07);
    color: var(--text-low);
    font-size: 13px;
}

.footer-bottom span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

@media (max-width: 1024px) {
    .header-top-note {
        display: none;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}

@media (max-width: 860px) {
    .site-header.is-compact .header-top {
        display: none;
    }

    .header-top {
        display: none;
    }

    .navbar .container {
        min-height: 62px;
    }

    .mini-brand {
        display: flex;
        margin-right: auto;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        margin: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        padding: 12px 16px;
        background: rgba(10, 15, 22, 0.98);
        border-bottom: 1px solid var(--line);
        display: none;
        border-radius: 0 0 16px 16px;
        box-shadow: 0 24px 34px rgba(0, 0, 0, 0.25);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-links a {
        width: 100%;
        justify-content: center;
        padding: 13px 16px;
        font-size: 16px;
    }

    .nav-links a::after {
        display: none;
    }

    .search-form {
        margin-left: auto;
        flex: 0 1 190px;
    }

    .search-form input {
        width: auto;
        flex: 1;
        min-width: 0;
    }

    .article-paper-head {
        padding: 34px 32px 10px;
    }

    .article-cover {
        margin: 26px 32px 0;
    }

    .article-content {
        padding: 16px 32px 42px;
        margin-top: 30px;
    }

    .article-paper-bottom {
        padding: 0 32px 40px;
    }

    .recommend-grid {
        grid-template-columns: 1fr;
    }

    .faq-wrap {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .cta-panel {
        flex-direction: column;
        align-items: flex-start;
        padding: 34px 28px;
    }

    .cta-action {
        width: 100%;
    }

    .cta-action .btn {
        flex: 1;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 16px;
    }

    .article-page-lead {
        padding: 32px 0 22px;
    }

    .breadcrumb {
        margin-bottom: 18px;
        font-size: 13px;
    }

    .article-lead-label {
        font-size: 12px;
    }

    .article-main-section {
        padding-top: 24px;
    }

    .article-paper-head {
        padding: 24px 18px 8px;
    }

    .article-kicker {
        gap: 6px;
    }

    .article-kicker .tag {
        padding: 2px 10px;
        font-size: 12px;
    }

    .article-paper h1 {
        font-size: 26px;
        line-height: 1.4;
        margin-bottom: 16px;
    }

    .article-meta {
        gap: 6px 14px;
        font-size: 13px;
        width: 100%;
    }

    .article-meta span {
        white-space: normal;
    }

    .article-cover {
        margin: 20px 18px 0;
    }

    .article-cover img {
        aspect-ratio: 16 / 10;
    }

    .article-content {
        padding: 12px 20px 34px;
        font-size: 15px;
    }

    .article-content blockquote {
        padding: 15px 16px;
        font-size: 15px;
    }

    .article-content h2 {
        font-size: 21px;
        margin-top: 1.8em;
    }

    .article-content pre {
        font-size: 13px;
        padding: 15px;
    }

    .article-paper-bottom {
        padding: 0 20px 30px;
    }

    .article-content h3 {
        font-size: 19px;
    }

    .article-actions .btn {
        flex: 1 1 100%;
    }

    .section-head {
        align-items: flex-start;
        flex-direction: column;
        gap: 6px;
    }

    .recommend-section,
    .faq-section,
    .cta-section {
        padding-top: 20px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .footer-about {
        font-size: 14px;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
        align-items: center;
        font-size: 12px;
    }

    .footer-bottom span {
        gap: 4px;
    }

    .navbar .container {
        gap: 6px;
    }

    .search-form {
        flex: 0 1 auto;
        width: 40px;
        height: 40px;
        justify-content: center;
        border-radius: 12px;
        padding: 0;
    }

    .search-form input {
        display: none;
    }

    .search-form svg {
        width: 18px;
        height: 18px;
    }

    .mini-brand {
        font-size: 15px;
        margin-right: 4px;
    }

    .nav-toggle {
        width: 40px;
        height: 40px;
    }

    .cta-action .btn {
        min-width: 100%;
    }
}

.js-no-backdrop .recommend-card,
.js-no-backdrop .faq-item,
.js-no-backdrop .search-form {
    background-color: rgba(22, 29, 37, 0.92);
}

/* roulang page: category1 */
:root{
  --bg-deep:#070A10;
  --bg-raise:#0D1219;
  --glass-bg:rgba(22,29,37,.56);
  --glass-edge:inset 0 1px 0 rgba(255,255,255,.06);
  --brand:#8BC34A;
  --brand-light:#B4E05C;
  --brand-dark:#5F8F2E;
  --energy:#FF7847;
  --highlight:#F4C74A;
  --text-hi:#EDF1F6;
  --text-mid:#A3AEBC;
  --text-low:#6B7684;
  --line:rgba(255,255,255,.09);
  --glow:0 0 24px rgba(139,195,74,.45);
  --radius:16px;
  --radius-sm:12px;
  --content:1200px;
  --gutter:24px;
  --font-main:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-deep);
  color:var(--text-hi);
  font-family:var(--font-main);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background .2s ease}
button,input{font-family:inherit;font-size:inherit}
input[type="search"]::-webkit-search-decoration,
input[type="search"]::-webkit-search-cancel-button{-webkit-appearance:none}
.container{width:min(var(--content),100% - 48px);margin-inline:auto}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px}
.section{padding:88px 0;position:relative}
.section-raise{background:var(--bg-raise);border-block:1px solid rgba(255,255,255,.05)}
.eyebrow{
  font-size:13px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--brand);
  margin:0 0 14px;
  display:flex;
  align-items:center;
  gap:10px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--brand);display:inline-block;border-radius:2px}
.h2-title{font-size:clamp(26px,3vw,36px);line-height:1.25;font-weight:800;margin:0;letter-spacing:-.02em}
.sec-desc{max-width:680px;color:var(--text-mid);font-size:16px;line-height:1.8;margin:14px 0 0}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:48px;
  padding:0 22px;
  border-radius:12px;
  border:1px solid transparent;
  font-weight:700;
  font-size:15px;
  line-height:1;
  cursor:pointer;
  white-space:nowrap;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease,opacity .2s ease;
}
.btn svg{width:17px;height:17px;flex:none}
.btn-primary{background:var(--brand);color:#080C11;box-shadow:var(--glow)}
.btn-primary:hover{background:var(--brand-light);box-shadow:0 0 32px rgba(139,195,74,.62);transform:translateY(-2px)}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 14px rgba(139,195,74,.35)}
.btn-ghost{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.18);color:var(--text-hi);backdrop-filter:blur(8px)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-light);box-shadow:0 0 18px rgba(139,195,74,.16);transform:translateY(-2px)}
.btn-lg{min-height:52px;padding:0 30px;font-size:16px}
.text-center{text-align:center}

/* 顶部导航 */
.site-header{
  color:var(--text-hi);
  position:sticky;
  top:0;
  width:100%;
  z-index:100;
}
.header-top{
  height:54px;
  overflow:hidden;
  transition:height .3s ease,opacity .25s ease;
  background:rgba(7,10,16,.78);
  backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
}
.header-top-inner{
  height:54px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:18px;
  font-weight:800;
  color:var(--text-hi);
  letter-spacing:-.02em;
}
.brand svg{width:30px;height:30px;flex:none}
.brand:hover .brand{color:var(--brand-light)}
.header-top-note{color:var(--text-mid);font-size:13px;text-align:right;line-height:1.4}
.navbar{background:rgba(7,10,16,.7);backdrop-filter:blur(14px);border-bottom:1px solid transparent;transition:background .25s,box-shadow .25s,border-color .25s}
.site-header.is-scrolled .header-top{height:0;opacity:0;border-bottom-width:0}
.site-header.is-scrolled .navbar{background:rgba(7,10,16,.86);border-bottom-color:rgba(255,255,255,.08);box-shadow:0 10px 24px rgba(0,0,0,.24)}
.site-header.is-scrolled .mini-brand{opacity:1;pointer-events:auto}
.navbar .container{
  display:flex;
  align-items:center;
  gap:18px;
  min-height:64px;
  position:relative;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:4px;
  flex:0 0 auto;
}
.nav-links a{
  display:inline-flex;
  align-items:center;
  height:64px;
  padding:0 15px;
  position:relative;
  color:var(--text-mid);
  font-weight:600;
  font-size:15px;
  border-radius:0;
  transition:color .2s ease;
}
.nav-links a:hover{color:var(--brand-light)}
.nav-links a::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:13px;
  height:2px;
  border-radius:2px;
  background:var(--brand);
  transform:scaleX(0);
  transition:transform .2s ease;
}
.nav-links a:hover::after{transform:scaleX(.5)}
.nav-links a.active{color:var(--brand-light)}
.nav-links a.active::after{
  transform:scaleX(1);
  box-shadow:0 0 12px rgba(139,195,74,.55);
}
.nav-links a.active{background:rgba(139,195,74,.08)}
.mini-brand{
  display:flex;
  align-items:center;
  gap:8px;
  font-weight:800;
  color:var(--text-hi);
  margin-right:8px;
  opacity:0;
  pointer-events:none;
  transition:opacity .25s;
  flex:none;
  white-space:nowrap;
}
.mini-brand svg{width:26px;height:26px}
.search-form{
  margin-left:auto;
  display:flex;
  align-items:center;
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.12);
  border-radius:999px;
  height:40px;
  width:min(280px,24vw);
  padding:0 6px 0 14px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-form:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(139,195,74,.16)}
.search-form svg{width:16px;height:16px;color:var(--text-mid);flex:none}
.search-form input{
  border:none;
  outline:none;
  background:transparent;
  color:var(--text-hi);
  padding:8px 10px;
  font-size:14px;
  width:100%;
}
.search-form input::placeholder{color:var(--text-low)}
.nav-toggle{
  display:none;
  flex-direction:column;
  gap:5px;
  width:44px;
  height:44px;
  align-items:center;
  justify-content:center;
  background:transparent;
  border:1px solid rgba(255,255,255,.14);
  border-radius:10px;
  padding:0;
  cursor:pointer;
}
.nav-toggle span{width:20px;height:2px;background:var(--text-hi);border-radius:2px;display:block;transition:transform .2s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(3.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* 分类页 Hero */
.cat-hero{
  position:relative;
  padding:88px 0 72px;
  background:
    radial-gradient(600px 240px at 15% 15%,rgba(139,195,74,.2),transparent 70%),
    radial-gradient(720px 300px at 90% 10%,rgba(255,120,71,.1),transparent 60%),
    linear-gradient(180deg,rgba(7,10,16,.7),rgba(13,18,25,.92)),url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
  border-bottom:1px solid rgba(255,255,255,.07);
  overflow:hidden;
}
.cat-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);
  background-size:48px 48px;
  pointer-events:none;
}
.cat-hero .container{position:relative;z-index:2}
.breadcrumb{
  margin-bottom:26px;
  font-size:13px;
  color:var(--text-mid);
  display:flex;
  align-items:center;
}
.breadcrumb a{color:var(--text-mid)}
.breadcrumb a:hover{color:var(--brand-light)}
.breadcrumb span{margin:0 8px;color:var(--text-low)}
.breadcrumb .crumb-here{color:var(--text-hi)}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:rgba(139,195,74,.12);
  border:1px solid rgba(139,195,74,.35);
  border-radius:999px;
  color:var(--brand-light);
  font-size:13px;
  font-weight:600;
  padding:6px 12px;
  margin-bottom:18px;
}
.hero-badge .pulse{width:7px;height:7px;border-radius:999px;background:var(--energy);box-shadow:0 0 0 0 rgba(255,120,71,.5);display:inline-block;animation:pulse 2s infinite}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(255,120,71,.45)}
  70%{box-shadow:0 0 0 7px rgba(255,120,71,0)}
  100%{box-shadow:0 0 0 0 rgba(255,120,71,0)}
}
.cat-hero h1{
  font-size:clamp(34px,5vw,56px);
  line-height:1.18;
  letter-spacing:-.03em;
  font-weight:800;
  margin:0;
}
.cat-hero h1 em{font-style:normal;color:var(--brand-light)}
.cat-hero .lead{
  max-width:720px;
  margin:20px 0 0;
  font-size:clamp(16px,1.6vw,19px);
  line-height:1.85;
  color:var(--text-mid);
}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}

/* 价值主张信息带 */
.value-section{padding:88px 0 72px}
.value-list{border-top:1px solid var(--line);margin-top:46px}
.value-row{
  display:grid;
  grid-template-columns:72px 210px 1fr;
  gap:20px;
  padding:30px 4px;
  border-bottom:1px solid var(--line);
  align-items:start;
  transition:background .2s ease;
}
.value-row:hover{background:rgba(139,195,74,.03)}
.value-num{
  font-size:38px;
  font-weight:800;
  line-height:1;
  color:rgba(139,195,74,.22);
  font-variant-numeric:tabular-nums;
  transition:color .2s;
}
.value-row:hover .value-num{color:var(--brand)}
.value-head{font-size:20px;font-weight:700;line-height:1.4}
.value-desc{color:var(--text-mid);font-size:15px;line-height:1.8;padding-right:12px}

/* 分栏功能模块 */
.feature-split{padding:84px 0;background:var(--bg-raise)}
.feature-grid{
  display:grid;
  grid-template-columns:.9fr 1.1fr;
  gap:64px;
  align-items:start;
}
.feature-copy .h2-title{margin:0 0 18px}
.feature-copy p{color:var(--text-mid);line-height:1.85;font-size:16px}
.feature-copy .btn{margin-top:18px}
.feature-copy .btn svg{margin-left:4px}
.feature-stack{display:grid;gap:22px}
.foil-card{
  background:var(--glass-bg);
  border:1px solid rgba(255,255,255,.1);
  box-shadow:var(--glass-edge),0 14px 30px rgba(0,0,0,.16);
  border-radius:var(--radius);
  padding:24px;
  display:grid;
  grid-template-columns:1fr auto;
  gap:20px;
  align-items:center;
  transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
@media (max-width:560px){
  .foil-card{grid-template-columns:1fr}
}
.foil-card:hover{border-color:rgba(139,195,74,.55);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(139,195,74,.16),0 18px 34px rgba(0,0,0,.24)}
.foil-icon{
  width:50px;height:50px;
  border-radius:14px;
  background:rgba(139,195,74,.12);
  border:1px solid rgba(139,195,74,.24);
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--brand);
  margin-bottom:16px;
}
.foil-icon svg{width:25px;height:25px}
.foil-card h3{font-size:18px;margin:0 0 6px;font-weight:700}
.foil-card p{margin:0;color:var(--text-mid);font-size:14px;line-height:1.75}
.card-arrow{
  width:38px;height:38px;
  border-radius:50%;
  border:1px solid rgba(255,255,255,.16);
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--text-low);
  transition:color .2s,border-color .2s,transform .2s;
}
.foil-card:hover .card-arrow{color:var(--brand-light);border-color:var(--brand);transform:translateX(4px)}
/* 资讯内容方向栏目 */
.topic-head{margin-bottom:24px}
.topic-layout{
  display:grid;
  grid-template-columns:1.45fr 1fr;
  gap:24px;
  margin-top:40px;
}
.topic-feature{
  background:var(--glass-bg);
  border:1px solid rgba(255,255,255,.1);
  border-radius:var(--radius);
  overflow:hidden;
  display:flex;
  flex-direction:column;
  transition:box-shadow .2s,border-color .2s;
}
.topic-feature:hover{border-color:rgba(139,195,74,.4);box-shadow:0 0 0 1px rgba(139,195,74,.12),0 18px 30px rgba(0,0,0,.22)}
.topic-feature img{height:238px;width:100%;object-fit:cover}
.topic-feature-body{padding:22px}
.topic-feature-body h3{margin:10px 0 8px;font-size:22px;font-weight:750}
.topic-feature-body p{margin:0 0 14px;color:var(--text-mid);font-size:15px;line-height:1.8}
.inline-link{color:var(--brand);font-weight:600;display:inline-flex;align-items:center;gap:5px}
.inline-link:hover{color:var(--brand-light)}
.inline-link svg{width:15px;height:15px;transition:transform .2s}
.inline-link:hover svg{transform:translateX(3px)}
.topic-pick-list{display:grid;gap:24px}
.topic-pick-card{
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.09);
  border-left:3px solid var(--brand);
  border-radius:var(--radius-sm);
  padding:20px 20px;
  display:flex;
  gap:16px;
  align-items:flex-start;
  transition:border-color .2s ease,transform .2s ease;
}
.topic-pick-card:hover{border-color:rgba(139,195,74,.4);border-left-color:var(--brand);transform:translateX(4px)}
.topic-pick-card img{width:86px;height:78px;border-radius:10px;object-fit:cover;flex:none}
.topic-pick-card h3{font-size:17px;margin:0 0 5px}
.topic-pick-card p{font-size:14px;color:var(--text-mid);margin:0;line-height:1.75}
.topic-pick-card .topic-time{display:block;font-size:12px;color:var(--text-low);margin-top:6px}
.topic-flag-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:16px;
  margin-top:24px;
}
.flag-card{
  background:rgba(20,27,36,.75);
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  padding:18px 20px;
  transition:background .2s ease,border-color .2s ease,transform .2s ease;
}
.flag-card:hover{background:rgba(139,195,74,.08);border-color:rgba(139,195,74,.32);transform:translateY(-2px)}
.flag-card .flag-index{display:block;font-size:15px;color:var(--brand);font-weight:800;margin-bottom:8px}
.flag-card h4{font-size:16px;margin:0}
.flag-card .flag-text{margin:6px 0 0;font-size:13px;color:var(--text-mid);line-height:1.6}

/* 信息阅读场景时间轴 */
.scene-wrap{margin-top:46px;position:relative}
.scene-line{
  position:absolute;
  left:23px;top:12px;bottom:12px;
  width:1px;
  background:linear-gradient(180deg,rgba(139,195,74,.45),rgba(255,255,255,.08));
}
.scene-item{
  display:grid;
  grid-template-columns:46px 1fr;
  gap:20px;
  margin-bottom:26px;
  position:relative;
}
.scene-dot{
  width:46px;height:46px;border-radius:50%;
  background:#0F161F;
  border:1px solid rgba(139,195,74,.35);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 0 0 5px rgba(139,195,74,.05);
  z-index:1;
}
.scene-dot svg{width:20px;height:20px;color:var(--brand)}
.scene-body{
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.08);
  border-radius:var(--radius-sm);
  padding:20px 24px;
  transition:border-color .2s,background .2s;
}
.scene-body:hover{border-color:rgba(139,195,74,.32);background:rgba(139,195,74,.05)}
.scene-body h3{margin:0 0 8px;font-size:18px}
.scene-body p{margin:0;color:var(--text-mid);font-size:15px}

/* 可信度 / 编辑标准 */
.proof-layout{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
}
.proof-nums{display:grid;gap:26px}
.proof-row{display:grid;grid-template-columns:76px 1fr;gap:16px;align-items:center}
.proof-number{font-size:28px;font-weight:800;color:var(--brand);font-variant-numeric:tabular-nums;line-height:1}
.proof-label{color:var(--text-hi);font-weight:700;font-size:16px;margin-bottom:3px}
.proof-note{color:var(--text-mid);font-size:14px}
.proof-panel{
  background:var(--glass-bg);
  border:1px solid rgba(255,255,255,.1);
  border-radius:var(--radius);
  padding:28px;
  box-shadow:var(--glass-edge),0 14px 30px rgba(0,0,0,.12);
}
.proof-panel h3{font-size:22px;margin:0 0 4px}
.proof-panel .sub{color:var(--text-mid);font-size:15px;margin:0 0 20px}
.proof-list{display:grid;gap:14px;margin:0;padding:0;list-style:none}
.proof-list li{
  display:flex;
  gap:12px;
  color:var(--text-hi);
  line-height:1.6;
  font-size:15px;
}
.proof-list .check{
  width:22px;height:22px;border-radius:50%;
  background:rgba(139,195,74,.15);
  color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  flex:none;
  margin-top:2px;
}
.check svg{width:12px;height:12px}

/* FAQ */
.faq-layout{
  display:grid;
  grid-template-columns:.9fr 1.1fr;
  gap:56px;
  margin-top:18px;
}
.faq-layout .lead{color:var(--text-mid);margin:14px 0 0;line-height:1.85}
.faq-list{display:grid;gap:14px}
.faq-item{
  background:rgba(20,26,34,.72);
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  overflow:hidden;
  transition:border-color .2s;
}
.faq-item:hover{border-color:rgba(139,195,74,.36)}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 22px;
  font-weight:700;
  font-size:16px;
  color:var(--text-hi);
  min-height:60px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-icon{
  width:30px;height:30px;
  flex:none;
  border:1px solid rgba(255,255,255,.14);
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  color:var(--brand);
  transition:transform .25s;
}
.faq-item details[open] .faq-icon{transform:rotate(45deg)}
.faq-answer{padding:0 22px 20px;color:var(--text-mid);font-size:15px;line-height:1.8;margin:0}

/* CTA 面板 */
.cta-section{padding-bottom:90px}
.cta-banner{
  background:radial-gradient(400px 160px at 12% 90%,rgba(139,195,74,.17),transparent 65%),var(--bg-raise);
  border:1px solid rgba(139,195,74,.32);
  border-radius:20px;
  padding:48px 48px 44px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:30px;
  flex-wrap:wrap;
  box-shadow:0 0 0 1px rgba(139,195,74,.04),0 18px 36px rgba(0,0,0,.28);
}
.cta-banner h2{font-size:clamp(24px,3vw,34px);margin:0 0 10px;font-weight:800;letter-spacing:-.02em}
.cta-banner p{margin:0;color:var(--text-mid);font-size:16px;max-width:620px;line-height:1.8}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
.cta-actions .btn-ghost{background:rgba(255,255,255,.07)}

/* 页脚 */
.site-footer{
  background:#05080D;
  border-top:1px solid rgba(139,195,74,.28);
  padding-top:68px;
  color:var(--text-mid);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
}
.site-footer .brand{font-size:18px;margin-bottom:16px}
.footer-about{color:var(--text-mid);font-size:14px;line-height:1.85;max-width:340px;margin:0}
.footer-col-title{color:var(--text-hi);font-size:14px;font-weight:700;margin-bottom:16px;letter-spacing:.04em}
.footer-col a{
  display:block;
  padding:5px 0;
  color:var(--text-mid);
  font-size:14px;
}
.footer-col a:hover{color:var(--brand-light);transform:translateX(2px)}
.footer-contact{list-style:none;margin:0;padding:0}
.footer-contact li{display:flex;gap:8px;align-items:flex-start;margin:8px 0;font-size:14px;line-height:1.6;color:var(--text-mid)}
.footer-contact svg{flex:none;margin-top:4px;color:var(--brand)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  margin-top:50px;
  padding:24px 0 30px;
  display:flex;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--text-low);
}

/* 移动端适配 */
@media (max-width:1024px){
  .topic-layout{grid-template-columns:1fr}
  .topic-pick-list{grid-template-columns:1fr 1fr}
  .topic-flag-grid{grid-template-columns:repeat(2,1fr)}
  .feature-grid{gap:40px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:800px){
  .header-top{display:none}
  .page-hero etc adjust
  .navbar .container{flex-wrap:wrap;gap:8px}
  .nav-toggle{display:flex;margin-left:auto}
  .nav-links{
    display:none;
    position:absolute;
    top:56px;left:-12px;right:-12px;
    background:rgba(7,10,16,.98);
    border:1px solid rgba(255,255,255,.1);
    border-radius:14px;
    box-shadow:0 18px 34px rgba(0,0,0,.3);
    padding:14px;
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .nav-links.is-open{display:flex}
  .nav-links a{height:48px;justify-content:flex-start;padding:0 12px}
  .nav-links a::after{display:none}
  .nav-links a.active{background:rgba(139,195,74,.1);border-radius:8px}
  .mini-brand{opacity:0 !important;display:none}
  .search-form{flex:1 1 auto;min-width:0;width:auto}
  .value-row{grid-template-columns:52px 1fr;gap:10px 16px}
  .value-head{grid-column:2}
  .value-desc{grid-column:2}
  .feature-grid,.proof-layout,.faq-layout{grid-template-columns:1fr}
  .section{padding:64px 0}
  .cat-hero{padding:64px 0 54px}
  .cta-banner{padding:34px 22px}
  .topic-pick-list{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{justify-content:center;text-align:center}
  .footer-brand,.footer-col{margin-bottom:18px}
}
@media (max-width:520px){
  .container{width:min(100% - 32px,var(--content))}
  .topic-flag-grid{grid-template-columns:1fr}
  .topic-pick-card{flex-direction:column}
  .topic-pick-card img{width:100%;height:140px}
  .hero-actions .btn{width:100%}
  .cta-banner{flex-direction:column;text-align:left}
  .scene-body{padding:18px}
  .value-row{padding:24px 2px}
  .value-num{font-size:32px}
  .faq-item summary{padding:16px 16px;font-size:15px}
  .search-form{width:44px;border-radius:999px;padding:0;justify-content:center}
  .search-form svg{display:block;flex:none}
  .search-form input{display:none}
  .nav-links{top:52px}
}

/* roulang page: category2 */
:root {
  --bg-deep: #070A10;
  --bg-raise: #0D1219;
  --glass-bg: rgba(22, 29, 37, 0.56);
  --glass-edge: inset 0 1px 0 rgba(255,255,255,0.06);
  --brand: #8BC34A;
  --brand-light: #B4E05C;
  --brand-dark: #5F8F2E;
  --energy: #FF7847;
  --highlight: #F4C74A;
  --text-hi: #EDF1F6;
  --text-mid: #A3AEBC;
  --text-low: #6B7684;
  --line: rgba(255,255,255,0.09);
  --glow: 0 0 24px rgba(139,195,74,0.45);
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --shadow-green: 0 18px 50px rgba(13,24,12,.5);
}

* {
  box-sizing: border-box;
}

html {
  scrollbar-color: #2A3646 var(--bg-deep);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg-deep);
  color: var(--text-mid);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.page-scrolled {
  min-height: 100vh;
}

body.no-scroll {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
  object-fit: cover;
  border: 0;
}

svg {
  display: block;
  flex: none;
}

ul,
ol,
p,
figure,
blockquote {
  margin: 0;
  padding: 0;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  border: 0;
  background: none;
  cursor: pointer;
}

h1,
h2,
h3,
h4 {
  color: var(--text-hi);
  margin: 0;
  line-height: 1.25;
  text-wrap: balance;
}

::selection {
  background: rgba(139, 195, 74, 0.28);
  color: #fff;
}

:focus-visible {
  outline: 2px solid rgba(180, 224, 92, 0.85);
  outline-offset: 3px;
  border-radius: 4px;
}

.container {
  width: min(1200px, calc(100% - 48px));
  margin: 0 auto;
}

/* ============ 品牌与导航 ============ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 112px;
  z-index: 1000;
  pointer-events: none;
}

.site-header .header-top,
.site-header .navbar {
  pointer-events: auto;
  position: absolute;
  left: 0;
  right: 0;
  width: 100%;
}

.site-header .header-top {
  top: 0;
  height: 56px;
  display: flex;
  align-items: center;
  background: linear-gradient(180deg, rgba(7, 10, 16, .94), rgba(9, 14, 21, .76));
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: opacity .25s ease, transform .25s ease, visibility .25s ease;
}

.header-top-inner {
  display: flex;
  align-items: center;
  height: 56px;
  width: min(1200px, calc(100% - 48px));
  margin: 0 auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 810;
  letter-spacing: .02em;
  color: var(--text-hi);
  white-space: nowrap;
}

.brand svg {
  width: 31px;
  height: 31px;
  filter: drop-shadow(0 0 12px rgba(139,195,74,.18));
}

.header-top-note {
  font-size: 12px;
  color: var(--text-low);
  border-left: 1px solid var(--line);
  padding-left: 16px;
  margin-left: 14px;
  letter-spacing: .06em;
  white-space: nowrap;
}

.navbar {
  top: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: top .28s ease, background .28s ease, border-color .28s ease, box-shadow .28s ease;
}

.navbar .container {
  display: flex;
  align-items: center;
  height: 56px;
  gap: 16px;
}

.mini-brand {
  display: none;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  color: var(--text-hi);
  font-size: 15px;
  white-space: nowrap;
  padding-right: 14px;
  border-right: 1px solid var(--line);
}

body.page-scrolled .mini-brand {
  display: inline-flex;
}

.mini-brand svg {
  width: 24px;
  height: 24px;
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--bg-deep);
  opacity: 0;
  transition: opacity .3s;
  pointer-events: none;
}

body.page-scrolled .site-header .header-top {
  transform: translateY(-103%);
  opacity: 0;
  visibility: hidden;
}

body.page-scrolled .site-header .navbar {
  top: 0;
  background: rgba(10, 15, 22, .82);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 8px 30px rgba(0, 0, 0, .22);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  padding: 10px 16px;
  color: var(--text-mid);
  font-size: 15px;
  font-weight: 600;
  border-radius: 10px;
  position: relative;
  white-space: nowrap;
  transition: color .18s ease, background .18s ease;
}

.nav-links a:hover {
  color: var(--brand-light);
  background: rgba(139, 195, 74, .08);
}

.nav-links a.active {
  color: var(--brand-light);
  background: rgba(139, 195, 74, .09);
}

.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--brand);
  box-shadow: 0 0 12px rgba(139,195,74,.6);
}

.search-form {
  margin-left: auto;
  display: flex;
  align-items: center;
  width: min(245px, 24vw);
  height: 38px;
  gap: 8px;
  padding: 0 14px;
  border: 1px solid rgba(255,255,255,.13);
  background: rgba(14, 21, 29, .62);
  border-radius: 999px;
  transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
}

.search-form:focus-within {
  border-color: rgba(139,195,74,.7);
  background: rgba(15, 22, 30, .9);
  box-shadow: 0 0 0 3px rgba(139,195,74,.15);
}

.search-form svg {
  width: 17px;
  height: 17px;
  color: var(--text-low);
}

.search-form input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: 0;
  outline: none;
  color: var(--text-hi);
  font-size: 14px;
}

.search-form input::placeholder {
  color: var(--text-low);
}

.nav-toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  margin-left: auto;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.04);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--text-hi);
  transition: transform .2s ease, opacity .2s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============ 内页通用主题 ============ */
main {
  display: block;
  min-height: 80vh;
  margin-top: 112px;
  background:
    radial-gradient(circle at 50% 0%, rgba(139, 195, 74, .08), transparent 30vw),
    var(--bg-deep);
}

.page-hero {
  position: relative;
  padding: 70px 0 62px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(6,8,13,.94) 0%, rgba(7,10,15,.84) 46%, rgba(9,15,20,.62) 100%),
    url("/assets/images/backpic/back-2.png") center / cover no-repeat;
}

.page-hero::after {
  content: "";
  pointer-events: none;
  position: absolute;
  inset: 0;
  opacity: .5;
  background-image: linear-gradient(rgba(255,255,255,.022) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.022) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: linear-gradient(90deg, #000 40%, transparent 100%);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-low);
  margin-bottom: 22px;
  position: relative;
  z-index: 2;
}

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

.breadcrumb i {
  font-style: normal;
  opacity: .5;
}

.page-hero .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 28px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  color: #0A0E0B;
  background: var(--brand);
  box-shadow: var(--glow);
  margin-bottom: 18px;
  position: relative;
  z-index: 2;
}

.page-hero h1 {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 850;
  max-width: 820px;
  letter-spacing: .01em;
  margin-bottom: 18px;
  position: relative;
  z-index: 2;
}

.hero-lead {
  font-size: 17px;
  line-height: 1.8;
  max-width: 690px;
  color: #C6D0DC;
  position: relative;
  z-index: 2;
  margin-bottom: 22px;
}

.hero-meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  position: relative;
  z-index: 2;
}

.meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 32px;
  padding: 0 13px;
  color: var(--text-mid);
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.04);
  border-radius: 999px;
  font-size: 13px;
}

.meta-chip svg {
  width: 15px;
  height: 15px;
  color: var(--brand-light);
}

/* 阅读导览 */
.readmap {
  padding: 50px 0 12px;
}

.readmap .section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 26px;
}

.readmap h2 {
  font-size: clamp(24px, 3vw, 34px);
}

.section-subtitle {
  color: var(--text-low);
  font-size: 15px;
  max-width: 480px;
}

.chapter-map {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.chapter-map a {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,.1);
  box-shadow: var(--glass-edge), 0 12px 26px rgba(0,0,0,.16);
  border-radius: var(--radius-md);
  padding: 18px 16px;
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}

.chapter-map a:hover,
.chapter-map a:focus-visible {
  transform: translateY(-4px);
  border-color: rgba(139,195,74,.45);
  background: rgba(28,36,45,.66);
}

.map-index {
  font-size: 12px;
  color: var(--brand-light);
  font-weight: 750;
  letter-spacing: .08em;
}

.map-title {
  color: var(--text-hi);
  font-size: 16px;
  font-weight: 700;
  margin: 8px 0 6px;
  line-height: 1.4;
}

.map-desc {
  font-size: 13px;
  color: var(--text-mid);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 专题正文 */
.topic-wrap {
  padding: 48px 0 80px;
}

.topic-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 244px;
  gap: 58px;
  align-items: start;
}

.topic-body {
  min-width: 0;
}

.topic-rail {
  position: sticky;
  top: 118px;
  background: var(--glass-bg);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 18px;
  padding: 18px;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  box-shadow: var(--glass-edge);
}

.rail-title {
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--text-low);
  margin-bottom: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.rail-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.rail-list a {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 10px 10px;
  border-radius: 10px;
  font-size: 14px;
  line-height: 1.45;
  color: var(--text-mid);
  transition: background .18s ease, color .18s ease;
}

.rail-list a:hover,
.rail-list a.active {
  color: var(--brand-light);
  background: rgba(139,195,74,.08);
}

.chapter {
  display: grid;
  grid-template-columns: 1.02fr .98fr;
  gap: 52px;
  align-items: center;
  padding: 62px 0;
  border-bottom: 1px solid rgba(255,255,255,.09);
  scroll-margin-top: 140px;
}

.chapter.light {
  border-bottom: 0;
}

.chapter-visual {
  position: relative;
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-raise);
  border: 1px solid rgba(255,255,255,.12);
  box-shadow: 0 22px 50px rgba(0,0,0,.25);
}

.chapter-visual img {
  width: 100%;
  aspect-ratio: 4 / 3;
}

.chapter-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.09);
  border-radius: var(--radius-lg);
}

.visual-badge {
  position: absolute;
  left: 16px;
  bottom: 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 34px;
  padding: 0 14px;
  background: rgba(7,10,16,.72);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,.15);
  color: var(--text-hi);
  font-size: 13px;
  font-weight: 700;
  border-radius: 999px;
}

.visual-badge i {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 12px var(--brand);
  font-style: normal;
}

.chapter-copy {
  min-width: 0;
}

.chapter-index {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--brand-light);
  font-weight: 800;
  letter-spacing: .12em;
  margin-bottom: 14px;
}

.chapter-index::before {
  content: "";
  width: 20px;
  height: 2px;
  background: var(--brand);
  border-radius: 2px;
  opacity: .9;
}

.chapter-copy h2 {
  font-size: clamp(24px, 3vw, 36px);
  margin-bottom: 16px;
  position: relative;
}

.chapter-copy p {
  color: #B4BECB;
  line-height: 1.85;
  margin-bottom: 16px;
}

.check-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 20px;
}

.check-list li {
  position: relative;
  padding-left: 28px;
  color: #CBD3DF;
  line-height: 1.6;
}

.check-list li::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 4px rgba(139,195,74,.12);
  position: absolute;
  left: 4px;
  top: 11px;
}

.tag-list {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.tag-list span {
  height: 26px;
  padding: 0 11px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  font-size: 12px;
  color: #BBC6D5;
  border: 1px solid rgba(255,255,255,.16);
  background: rgba(255,255,255,.04);
}

.tag-list .energy {
  color: #FFF;
  border-color: rgba(255,120,71,.55);
  background: rgba(255,120,71,.14);
}

.chapter:nth-child(even) .chapter-visual {
  order: 2;
}

.chapter-reverse .chapter-visual {
  order: 2;
}

.stat-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 34px;
}

.stat-card {
  text-align: center;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 14px;
  padding: 20px 10px;
}

.stat-card strong {
  display: block;
  color: var(--text-hi);
  font-size: 26px;
  font-variant-numeric: tabular-nums;
  font-weight: 800;
}

.stat-card span {
  font-size: 13px;
  color: var(--text-mid);
}

/* 主题时间线 */
.chapter-note {
  margin-top: 28px;
  border-radius: var(--radius-md);
  padding: 20px 22px;
  background: rgba(139,195,74,.08);
  border: 1px solid rgba(139,195,74,.2);
}

.chapter-note.inline-note .note-title {
  color: var(--brand-light);
  font-weight: 750;
  margin-bottom: 6px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.chapter-note.inline-note .note-title svg {
  width: 16px;
  height: 16px;
}

.chapter-note p {
  margin: 0;
  font-size: 15px;
  color: #CBD5E2;
}

/* 章节间宽综述 */
.big-summary {
  padding: 54px 0 32px;
  text-align: center;
}

.big-summary h2 {
  font-size: clamp(24px, 3vw, 36px);
  max-width: 760px;
  margin: 0 auto 16px;
}

.big-summary p {
  max-width: 720px;
  margin: 0 auto;
}

/* FAQ */
.faq-section {
  padding: 84px 0 90px;
  background:
    linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-raise) 100%);
}

.faq-layout {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 64px;
  align-items: start;
}

.faq-head h2 {
  font-size: clamp(28px, 3.4vw, 40px);
  margin-bottom: 16px;
}

.faq-head p {
  color: var(--text-low);
  line-height: 1.75;
  max-width: 340px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--glass-bg);
  border: 1px solid rgba(255,255,255,.11);
  border-radius: 16px;
  transition: border-color .2s ease, background .2s ease;
}

.faq-item:hover {
  border-color: rgba(139,195,74,.36);
}

.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 20px 22px;
  color: var(--text-hi);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  min-height: 62px;
}

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

.faq-item summary::after {
  content: "+";
  flex: none;
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 21px;
  font-weight: 500;
  color: var(--brand-light);
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 999px;
  transition: transform .2s ease, background .2s ease, color .2s ease;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
  background: rgba(139,195,74,.18);
}

.faq-item .answer {
  padding: 0 22px 20px;
  color: #B0BAC8;
  line-height: 1.8;
}

.cta-band {
  padding: 22px 0 96px;
}

.cta-box {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 30px;
  overflow: hidden;
  padding: 44px 48px;
  border-radius: 24px;
  background: linear-gradient(120deg, rgba(25,34,45,.88), rgba(12,18,26,.88));
  border: 1px solid rgba(139,195,74,.35);
  box-shadow: var(--glow), var(--glass-edge);
}

.cta-box::before {
  content: "";
  position: absolute;
  width: 300px;
  height: 300px;
  right: -80px;
  top: -160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139,195,74,.2), transparent 70%);
}

.cta-box h2 {
  font-size: clamp(23px, 3vw, 34px);
  letter-spacing: .01em;
}

.cta-box p {
  color: var(--text-mid);
  margin-top: 10px;
  max-width: 570px;
}

.cta-action {
  display: flex;
  align-items: center;
  gap: 14px;
  position: relative;
  z-index: 2;
}

/* 按钮 */
.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 26px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 750;
  white-space: nowrap;
  transition: transform .16s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
}

.btn-primary {
  color: #090D06;
  background: var(--brand);
  box-shadow: 0 8px 24px rgba(139,195,74,.33);
}

.btn-primary svg {
  width: 17px;
  height: 17px;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--brand-light);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(139,195,74,.46);
}

.btn-primary:active {
  transform: translateY(1px);
  box-shadow: 0 4px 16px rgba(139,195,74,.32);
}

.btn-ghost {
  color: var(--text-hi);
  border: 1px solid rgba(255,255,255,.2);
  background: rgba(255,255,255,.07);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: rgba(139,195,74,.75);
  color: var(--brand-light);
  box-shadow: 0 0 24px rgba(139,195,74,.18);
  transform: translateY(-2px);
}

/* ============ 页脚 ============ */
.site-footer {
  background: #05070B;
  border-top: 1px solid rgba(139,195,74,.24);
  box-shadow: 0 -12px 50px rgba(0,0,0,.3);
  padding: 66px 0 0;
  position: relative;
  z-index: 2;
}

.site-footer::before {
  content: "";
  display: block;
  height: 1px;
  width: min(1200px, 100% - 48px);
  margin: 0 auto -58px;
  background: linear-gradient(90deg, transparent, var(--brand) 25%, transparent 100%);
  opacity: .32;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 44px;
}

.footer-brand .brand {
  color: var(--text-hi);
  margin-bottom: 14px;
}

.footer-about {
  font-size: 14px;
  color: var(--text-low);
  line-height: 1.8;
  max-width: 380px;
  margin-top: 14px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
}

.footer-col-title {
  color: var(--text-hi);
  font-size: 15px;
  font-weight: 750;
  margin-bottom: 8px;
}

.footer-col a {
  color: var(--text-mid);
  line-height: 1.7;
  transition: color .16s ease;
}

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

.footer-contact {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  color: var(--text-mid);
  font-size: 14px;
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.6;
}

.footer-contact svg {
  width: 16px;
  height: 16px;
  margin-top: 4px;
  color: var(--brand);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  padding: 34px 0 28px;
  margin-top: 58px;
  border-top: 1px solid rgba(255,255,255,.08);
  color: var(--text-low);
  font-size: 13px;
  line-height: 1.7;
}

.footer-bottom span:first-child {
  color: #909BAB;
  font-weight: 600;
}

/* ============ 响应式断点 ============ */
@media (max-width: 1024px) {
  .page-hero {
    padding: 56px 0 48px;
  }

  .topic-layout {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .topic-rail {
    display: none;
  }

  .chapter {
    gap: 34px;
  }

  .chapter-map {
    grid-template-columns: repeat(2, 1fr);
  }

  .faq-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .faq-head p {
    max-width: 640px;
  }

  .cta-box {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .site-header {
    height: 102px;
  }

  .site-header .header-top,
  .header-top-inner,
  .navbar {
    height: 52px;
  }

  .header-top {
    top: 0;
  }

  .navbar {
    top: 52px;
  }

  main {
    margin-top: 102px;
  }

  .header-top-note {
    display: none;
  }

  .search-form {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    left: 12px;
    right: 12px;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 14px;
    background: rgba(8, 12, 18, .97);
    border: 1px solid rgba(255,255,255,.14);
    border-radius: 18px;
    box-shadow: 0 24px 50px rgba(0,0,0,.5);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    justify-content: center;
    padding: 13px 18px;
  }

  .nav-links a.active::after {
    left: 18px;
    right: 18px;
    bottom: 2px;
  }

  body.page-scrolled .navbar {
    top: 0;
  }

  body.page-scrolled .mini-brand {
    display: inline-flex;
    margin-right: 2px;
  }

  .mini-brand {
    max-width: calc(100vw - 150px);
    overflow: hidden;
    text-overflow: ellipsis;
    display: none;
  }

  .site-header .navbar .container {
    gap: 6px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 38px 30px;
  }
}

@media (max-width: 768px) {
  body {
    font-size: 15px;
  }

  .header-top .brand {
    font-size: 17px;
  }

  .brand svg {
    width: 29px;
    height: 29px;
  }

  .page-hero h1 {
    font-size: clamp(28px, 6.4vw, 38px);
  }

  .hero-lead {
    font-size: 15px;
  }

  .breadcrumb {
    font-size: 12px;
  }

  .page-hero .eyebrow {
    height: 26px;
    font-size: 12px;
  }

  .topic-wrap {
    padding: 0 0 56px;
  }

  .chapter {
    grid-template-columns: 1fr;
    gap: 26px;
    padding: 52px 0;
  }

  .chapter-reverse .chapter-visual,
  .chapter:nth-child(even) .chapter-visual {
    order: 2;
  }

  .chapter-visual {
    order: 1;
  }

  .chapter-visual img {
    aspect-ratio: 16 / 10;
  }

  .stat-strip {
    grid-template-columns: 1fr 1fr;
  }

  .cta-box {
    padding: 34px 22px;
  }

  .cta-action {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-primary,
  .btn-ghost {
    width: 100%;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}

@media (max-width: 600px) {
  .container {
    width: calc(100% - 36px);
  }

  .header-top .brand,
  .footer-brand .brand {
    font-size: 17px;
  }

  .header-top svg,
  .footer-brand svg {
    width: 27px;
    height: 27px;
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .chapter-map {
    grid-template-columns: 1fr;
  }

  .readmap {
    padding-top: 34px;
  }

  .topic-layout {
    gap: 20px;
  }

  .page-hero {
    padding: 44px 0 38px;
  }

  .page-hero h1 {
    margin-bottom: 14px;
  }

  .hero-meta .meta-chip:nth-child(3) {
    display: none;
  }

  .faq-section {
    padding: 58px 0 62px;
  }

  .faq-item summary {
    padding: 17px 16px;
    font-size: 15px;
  }

  .faq-item .answer {
    padding: 0 16px 18px;
    font-size: 14px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .footer-bottom {
    justify-content: flex-start;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .chapter-map a,
  .chapter-visual,
  .faq-item,
  .brand svg,
  .btn-primary,
  .btn-ghost {
    transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease, background .2s ease, opacity .2s ease;
  }
}