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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: #202124;
  background-color: #ffffff;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ===== 导航栏 ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #ffffff;
  border-bottom: 1px solid #e8eaed;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  font-weight: 600;
  color: #1f2937;
  text-decoration: none;
}

.nav-brand-icon {
  width: 28px;
  height: 28px;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-link {
  color: #5f6368;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

.nav-link:hover {
  color: #202124;
}

.nav-link.active {
  color: #1f73e6;
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -16px;
  left: 0;
  right: 0;
  height: 3px;
  background: #1f73e6;
  border-radius: 2px 2px 0 0;
}

.nav-dl {
  display: none;
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .nav-dl {
    display: block;
  }
}

/* ===== 通用样式 ===== */
.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.sec {
  padding: 80px 20px;
}

.sec-head {
  text-align: center;
  margin-bottom: 60px;
}

.sec-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: #1f73e6;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

.sec-title {
  font-size: 36px;
  font-weight: 700;
  color: #202124;
  margin-bottom: 16px;
  line-height: 1.2;
}

.sec-sub {
  font-size: 16px;
  color: #5f6368;
  max-width: 600px;
  margin: 0 auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  gap: 8px;
}

.btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.btn-primary {
  background: #1f73e6;
  color: #ffffff;
}

.btn-primary:hover:not(:disabled) {
  background: #1557b0;
  box-shadow: 0 4px 12px rgba(31, 115, 230, 0.3);
}

.btn-outline {
  background: transparent;
  color: #1f73e6;
  border: 1px solid #1f73e6;
}

.btn-outline:hover:not(:disabled) {
  background: #f3f7ff;
}

.btn-white {
  background: #ffffff;
  color: #1f73e6;
  border: 1px solid #e8eaed;
}

.btn-white:hover:not(:disabled) {
  background: #f8f9fa;
}

.btn-lg {
  padding: 16px 40px;
  font-size: 16px;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
}

/* ===== Hero 区域 ===== */
.hero {
  background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
  padding: 100px 20px;
  text-align: center;
}

.hero-inner {
  max-width: 900px;
  margin: 0 auto;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 13px;
  color: #5f6368;
  margin-bottom: 16px;
  padding: 6px 12px;
  background: #f1f3f4;
  border-radius: 20px;
}

.hero-h1 {
  font-size: 48px;
  font-weight: 700;
  color: #202124;
  margin-bottom: 16px;
  line-height: 1.2;
}

.hero-desc {
  font-size: 18px;
  color: #5f6368;
  margin-bottom: 32px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-trust {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
  font-size: 13px;
  color: #5f6368;
}

.hero-trust-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ===== 特性卡片网格 ===== */
.feat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-bottom: 0;
}

.feat-card {
  background: #ffffff;
  border: 1px solid #e8eaed;
  border-radius: 8px;
  padding: 32px 24px;
  text-align: center;
  transition: all 0.3s ease;
}

.feat-card:hover {
  border-color: #1f73e6;
  box-shadow: 0 8px 24px rgba(31, 115, 230, 0.12);
  transform: translateY(-4px);
}

.feat-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  color: #1f73e6;
}

.feat-name {
  font-size: 18px;
  font-weight: 600;
  color: #202124;
  margin-bottom: 12px;
}

.feat-desc {
  font-size: 14px;
  color: #5f6368;
  line-height: 1.6;
}

/* ===== 平台卡片 ===== */
.plat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 0;
}

.plat-card {
  background: #ffffff;
  border: 1px solid #e8eaed;
  border-radius: 8px;
  padding: 24px;
  text-align: center;
  transition: all 0.3s ease;
}

.plat-card:hover {
  border-color: #1f73e6;
  box-shadow: 0 4px 12px rgba(31, 115, 230, 0.1);
}

.plat-card.featured {
  border-color: #1f73e6;
  background: #f3f7ff;
}

.plat-icon {
  width: 40px;
  height: 40px;
  margin: 0 auto 12px;
  color: #1f73e6;
}

.plat-name {
  font-size: 16px;
  font-weight: 600;
  color: #202124;
  margin-bottom: 8px;
}

.plat-ver {
  font-size: 12px;
  color: #5f6368;
  margin-bottom: 16px;
}

.plat-desc {
  font-size: 13px;
  color: #5f6368;
  margin-bottom: 16px;
  line-height: 1.5;
}

.plat-btn {
  width: 100%;
}

/* ===== 深度功能行 ===== */
.deep-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 60px;
}

.deep-row.flip {
  direction: rtl;
}

.deep-row.flip > * {
  direction: ltr;
}

.deep-info {
  padding: 20px 0;
}

.deep-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: #1f73e6;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

.deep-title {
  font-size: 28px;
  font-weight: 700;
  color: #202124;
  margin-bottom: 16px;
  line-height: 1.3;
}

.deep-desc {
  font-size: 15px;
  color: #5f6368;
  margin-bottom: 24px;
  line-height: 1.6;
}

.deep-list {
  list-style: none;
  margin-bottom: 24px;
}

.deep-list-item {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
  font-size: 14px;
  color: #5f6368;
}

.deep-list-dot {
  width: 6px;
  height: 6px;
  background: #1f73e6;
  border-radius: 50%;
  margin-top: 6px;
  flex-shrink: 0;
}

.deep-visual {
  background: #f8f9fa;
  border-radius: 8px;
  padding: 40px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
}

.deep-visual svg {
  width: 100%;
  max-width: 400px;
  height: auto;
}

@media (max-width: 768px) {
  .deep-row {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .deep-row.flip {
    direction: ltr;
  }
}

/* ===== 统计条 ===== */
.stats-strip {
  background: #f8f9fa;
  padding: 40px 20px;
  margin: 60px 0;
}

.stats-row {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  text-align: center;
}

.stat-item {
  padding: 0;
}

.stat-num {
  font-size: 32px;
  font-weight: 700;
  color: #1f73e6;
  margin-bottom: 8px;
}

.stat-lbl {
  font-size: 14px;
  color: #5f6368;
}

/* ===== 用户评价 ===== */
.rev-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  margin-bottom: 0;
}

.rev-card {
  background: #ffffff;
  border: 1px solid #e8eaed;
  border-radius: 8px;
  padding: 24px;
}

.rev-header {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  align-items: center;
}

.rev-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 600;
  font-size: 14px;
}

.rev-avatar.av-blue {
  background: #1f73e6;
}

.rev-avatar.av-green {
  background: #0d9488;
}

.rev-avatar.av-orange {
  background: #ea580c;
}

.rev-avatar.av-purple {
  background: #7c3aed;
}

.rev-avatar.av-pink {
  background: #ec4899;
}

.rev-avatar.av-amber {
  background: #d97706;
}

.rev-meta {
  flex: 1;
}

.rev-name {
  font-size: 14px;
  font-weight: 600;
  color: #202124;
  margin-bottom: 4px;
}

.rev-role {
  font-size: 12px;
  color: #5f6368;
}

.rev-stars {
  display: flex;
  gap: 4px;
  margin-bottom: 12px;
}

.star {
  color: #fbbc04;
  font-size: 14px;
}

.rev-text {
  font-size: 14px;
  color: #5f6368;
  line-height: 1.6;
}

/* ===== 对比表格 ===== */
.cmp-wrap {
  overflow-x: auto;
}

.cmp-table {
  width: 100%;
  border-collapse: collapse;
  background: #ffffff;
}

.cmp-table th,
.cmp-table td {
  padding: 16px;
  text-align: left;
  border-bottom: 1px solid #e8eaed;
}

.cmp-table th {
  background: #f8f9fa;
  font-weight: 600;
  color: #202124;
  font-size: 14px;
}

.cmp-table td {
  font-size: 14px;
  color: #5f6368;
}

.cmp-hl {
  color: #1f73e6;
  font-weight: 600;
}

.yes {
  color: #0d9488;
}

.no {
  color: #d32f2f;
}

.part {
  color: #f57c00;
}

/* ===== FAQ 手风琴 ===== */
.faq-list {
  list-style: none;
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid #e8eaed;
  padding: 20px 0;
}

.faq-item:first-child {
  border-top: 1px solid #e8eaed;
}

.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
  font-size: 15px;
  font-weight: 600;
  color: #202124;
  transition: color 0.3s ease;
}

.faq-q:hover {
  color: #1f73e6;
}

.faq-chevron {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease;
  color: #5f6368;
}

.faq-item.open .faq-chevron {
  transform: rotate(180deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.open .faq-a {
  max-height: 500px;
}

.faq-a-inner {
  padding: 20px 0;
  font-size: 14px;
  color: #5f6368;
  line-height: 1.6;
}

/* ===== CTA 横幅 ===== */
.cta-banner {
  background: linear-gradient(135deg, #1f73e6 0%, #1557b0 100%);
  color: #ffffff;
  padding: 60px 20px;
  text-align: center;
  border-radius: 8px;
  margin: 60px 0;
}

.cta-title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-desc {
  font-size: 16px;
  margin-bottom: 32px;
  opacity: 0.95;
}

.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-actions .btn {
  background: #ffffff;
  color: #1f73e6;
}

.cta-actions .btn:hover {
  background: #f3f7ff;
}

/* ===== 下载页面 ===== */
.dl-hero {
  background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
  padding: 60px 20px;
  text-align: center;
}

.dl-hero-title {
  font-size: 40px;
  font-weight: 700;
  color: #202124;
  margin-bottom: 16px;
}

.dl-hero-sub {
  font-size: 16px;
  color: #5f6368;
  margin-bottom: 32px;
}

.dl-main-wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 20px;
}

.dl-main-card {
  background: #ffffff;
  border: 2px solid #1f73e6;
  border-radius: 8px;
  padding: 40px;
  margin-bottom: 60px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.dl-main-top {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 24px;
}

.dl-main-icon {
  width: 48px;
  height: 48px;
  color: #1f73e6;
  flex-shrink: 0;
}

.dl-main-info {
  flex: 1;
}

.dl-main-name {
  font-size: 20px;
  font-weight: 700;
  color: #202124;
  margin-bottom: 4px;
}

.dl-main-meta {
  font-size: 13px;
  color: #5f6368;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.dl-main-body {
  border-top: 1px solid #e8eaed;
  padding-top: 24px;
}

.dl-specs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.dl-spec {
  text-align: center;
}

.dl-spec-label {
  font-size: 12px;
  color: #5f6368;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.dl-spec-val {
  font-size: 16px;
  font-weight: 600;
  color: #202124;
}

.dl-sec-badge {
  display: inline-block;
  font-size: 12px;
  color: #0d9488;
  background: #ecfdf5;
  padding: 6px 12px;
  border-radius: 4px;
  margin-bottom: 24px;
}

.dl-main-btns {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.dl-main-btns .btn {
  flex: 1;
  min-width: 150px;
}

/* ===== 其他平台卡片 ===== */
.op-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 60px;
}

.op-card {
  background: #ffffff;
  border: 1px solid #e8eaed;
  border-radius: 8px;
  padding: 24px;
  text-align: center;
}

.op-icon {
  width: 40px;
  height: 40px;
  margin: 0 auto 12px;
  color: #1f73e6;
}

.op-name {
  font-size: 16px;
  font-weight: 600;
  color: #202124;
  margin-bottom: 8px;
}

.op-ver {
  font-size: 12px;
  color: #5f6368;
  margin-bottom: 12px;
}

.op-steps {
  font-size: 13px;
  color: #5f6368;
  text-align: left;
  margin-bottom: 16px;
  line-height: 1.6;
}

.op-steps li {
  margin-bottom: 8px;
}

/* ===== 安装指南 ===== */
.guide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-bottom: 60px;
}

.guide-col-title {
  font-size: 18px;
  font-weight: 700;
  color: #202124;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.guide-col-dot {
  width: 8px;
  height: 8px;
  background: #1f73e6;
  border-radius: 50%;
}

.guide-steps {
  list-style: none;
}

.gstep {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}

.gstep-num {
  width: 32px;
  height: 32px;
  background: #1f73e6;
  color: #ffffff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  flex-shrink: 0;
}

.gstep-body {
  flex: 1;
}

.gstep-title {
  font-size: 15px;
  font-weight: 600;
  color: #202124;
  margin-bottom: 6px;
}

.gstep-desc {
  font-size: 13px;
  color: #5f6368;
  line-height: 1.5;
}

@media (max-width: 768px) {
  .guide-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== 系统要求 ===== */
.req-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 60px;
}

.req-card {
  background: #f8f9fa;
  border-radius: 8px;
  padding: 24px;
  text-align: center;
}

.req-icon {
  width: 40px;
  height: 40px;
  margin: 0 auto 12px;
  color: #1f73e6;
}

.req-title {
  font-size: 15px;
  font-weight: 600;
  color: #202124;
  margin-bottom: 12px;
}

.req-val {
  font-size: 13px;
  color: #5f6368;
  line-height: 1.6;
}

/* ===== 版本日志 ===== */
.ver-list {
  list-style: none;
  max-width: 800px;
  margin: 0 auto 60px;
}

.ver-item {
  display: flex;
  gap: 24px;
  margin-bottom: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid #e8eaed;
}

.ver-item:last-child {
  border-bottom: none;
}

.ver-dot-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.ver-dot {
  width: 12px;
  height: 12px;
  background: #1f73e6;
  border-radius: 50%;
  border: 3px solid #ffffff;
  box-shadow: 0 0 0 1px #1f73e6;
}

.ver-line {
  width: 2px;
  flex: 1;
  background: #e8eaed;
}

.ver-item:last-child .ver-line {
  display: none;
}

.ver-body {
  flex: 1;
  padding-top: 4px;
}

.ver-head {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.ver-num {
  font-size: 15px;
  font-weight: 700;
  color: #202124;
}

.ver-tag {
  display: inline-block;
  font-size: 11px;
  padding: 4px 8px;
  background: #f1f3f4;
  border-radius: 3px;
  color: #5f6368;
  font-weight: 600;
}

.ver-tag.stable {
  background: #ecfdf5;
  color: #0d9488;
}

.ver-tag.beta {
  background: #fef3c7;
  color: #b45309;
}

.ver-date {
  font-size: 12px;
  color: #5f6368;
}

.ver-desc {
  font-size: 13px;
  color: #5f6368;
  line-height: 1.5;
  margin-top: 8px;
}

/* ===== 安全横幅 ===== */
.sec-banner {
  background: #ecfdf5;
  border: 1px solid #d1fae5;
  border-radius: 8px;
  padding: 24px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 60px;
}

.sec-banner-ico {
  width: 24px;
  height: 24px;
  color: #0d9488;
  flex-shrink: 0;
  margin-top: 2px;
}

.sec-banner-text {
  flex: 1;
}

.sec-banner-title {
  font-size: 15px;
  font-weight: 700;
  color: #0d9488;
  margin-bottom: 6px;
}

.sec-banner-desc {
  font-size: 13px;
  color: #047857;
  line-height: 1.6;
}

/* ===== 文章页面 ===== */
.art-hero {
  background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
  padding: 60px 20px;
  text-align: center;
}

.art-hero-inner {
  max-width: 900px;
  margin: 0 auto;
}

.art-hero-crumb {
  font-size: 12px;
  color: #5f6368;
  margin-bottom: 16px;
}

.art-hero-title {
  font-size: 40px;
  font-weight: 700;
  color: #202124;
  margin-bottom: 16px;
  line-height: 1.2;
}

.art-hero-sub {
  font-size: 16px;
  color: #5f6368;
}

.kw-strip {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 24px;
}

.kw {
  display: inline-block;
  font-size: 12px;
  background: #f1f3f4;
  color: #5f6368;
  padding: 6px 12px;
  border-radius: 20px;
}

.art-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 20px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
}

.art-body {
  font-size: 15px;
  color: #5f6368;
  line-height: 1.8;
}

.art-body h2 {
  font-size: 24px;
  font-weight: 700;
  color: #202124;
  margin: 40px 0 20px;
  line-height: 1.3;
}

.art-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: #202124;
  margin: 28px 0 16px;
}

.art-body p {
  margin-bottom: 16px;
}

.art-body ul,
.art-body ol {
  margin-left: 24px;
  margin-bottom: 16px;
}

.art-body li {
  margin-bottom: 8px;
}

.art-body strong {
  color: #202124;
  font-weight: 600;
}

.inline-cta {
  background: #f3f7ff;
  border: 1px solid #d1e7ff;
  border-radius: 8px;
  padding: 24px;
  margin: 32px 0;
  text-align: center;
}

.inline-cta-title {
  font-size: 16px;
  font-weight: 700;
  color: #202124;
  margin-bottom: 12px;
}

.inline-cta-desc {
  font-size: 14px;
  color: #5f6368;
  margin-bottom: 16px;
}

.inline-cta .btn {
  margin: 0 auto;
}

/* ===== 侧边栏 ===== */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sbox {
  background: #f8f9fa;
  border-radius: 8px;
  padding: 20px;
}

.sbox-title {
  font-size: 14px;
  font-weight: 700;
  color: #202124;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.sdl-btn {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 12px;
  background: #ffffff;
  border: 1px solid #e8eaed;
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
  margin-bottom: 12px;
  transition: all 0.3s ease;
}

.sdl-btn:last-child {
  margin-bottom: 0;
}

.sdl-btn:hover {
  border-color: #1f73e6;
  background: #f3f7ff;
}

.sdl-btn.primary {
  background: #1f73e6;
  color: #ffffff;
  border-color: #1f73e6;
}

.sdl-btn.primary:hover {
  background: #1557b0;
}

.sdl-btn-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.sdl-btn-info {
  flex: 1;
  text-align: left;
}

.sdl-btn-name {
  font-size: 13px;
  font-weight: 600;
  color: inherit;
}

.sdl-btn-ver {
  font-size: 11px;
  color: #5f6368;
  margin-top: 2px;
}

.stoc {
  list-style: none;
}

.stoc li {
  margin-bottom: 12px;
}

.stoc a {
  font-size: 13px;
  color: #1f73e6;
  text-decoration: none;
  transition: color 0.3s ease;
}

.stoc a:hover {
  color: #1557b0;
  text-decoration: underline;
}

.sstat {
  list-style: none;
}

.sstat-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid #e8eaed;
  font-size: 13px;
}

.sstat-item:last-child {
  border-bottom: none;
}

.sstat-num {
  font-weight: 700;
  color: #1f73e6;
}

.sstat-lbl {
  color: #5f6368;
}

.side-security {
  background: #ecfdf5;
  border: 1px solid #d1fae5;
  border-radius: 6px;
  padding: 12px;
  font-size: 12px;
  color: #047857;
  line-height: 1.5;
}

@media (max-width: 768px) {
  .art-layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    display: none;
  }
}

/* ===== 页脚 ===== */
.site-footer {
  background: #f8f9fa;
  border-top: 1px solid #e8eaed;
  padding: 40px 20px;
  text-align: center;
  font-size: 13px;
  color: #5f6368;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-security {
  margin-bottom: 16px;
  font-weight: 500;
}

.footer-note {
  line-height: 1.6;
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
  .sec {
    padding: 60px 20px;
  }

  .sec-title {
    font-size: 28px;
  }

  .hero-h1 {
    font-size: 32px;
  }

  .hero-desc {
    font-size: 16px;
  }

  .feat-grid,
  .plat-grid,
  .rev-grid,
  .op-grid,
  .req-grid {
    grid-template-columns: 1fr;
  }

  .deep-row {
    grid-template-columns: 1fr;
  }

  .dl-main-card {
    padding: 24px;
  }

  .dl-specs {
    grid-template-columns: 1fr;
  }

  .dl-main-btns {
    flex-direction: column;
  }

  .dl-main-btns .btn {
    width: 100%;
  }

  .hero-actions,
  .cta-actions {
    flex-direction: column;
  }

  .hero-actions .btn,
  .cta-actions .btn {
    width: 100%;
  }

  .nav-links {
    display: none;
  }

  .stats-row {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .sec-title {
    font-size: 24px;
  }

  .hero-h1 {
    font-size: 24px;
  }

  .hero-desc {
    font-size: 14px;
  }

  .stats-row {
    grid-template-columns: 1fr;
  }

  .cmp-table {
    font-size: 12px;
  }

  .cmp-table th,
  .cmp-table td {
    padding: 12px 8px;
  }
}