/* ===== 重置与基础 ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-primary: #000000;
  --color-white: #ffffff;
  --color-bg: #f7f9fc;
  --color-bg-soft: #fafbfd;
  --color-text: #0f172a;
  --color-text-muted: #818999;
  --color-text-light: #b6bcc8;
  --color-accent: #4f46e5;
  --color-accent-soft: #eef0ff;
  --color-border: #eceef3;
  --color-blue: #4d6dff;
  --color-purple: #8b5cf6;
  --color-green: #22c55e;
  --color-orange: #f97316;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-pill: 50px;

  --shadow-nav: 0 4px 24px rgba(15, 23, 42, 0.06);
  --shadow-card: 0 10px 60px rgba(0, 25, 126, 0.08);
  --shadow-soft: 0 4px 24px rgba(15, 23, 42, 0.04);

  --font-stack: -apple-system, BlinkMacSystemFont, "Inter", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 120px;
}

body {
  font-family: var(--font-stack);
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul {
  list-style: none;
}

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

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

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  line-height: 1;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}
.btn-primary:hover {
  background: #1f2937;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.btn-outline {
  background: var(--color-white);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}
.btn-outline:hover {
  background: #f7f9fc;
  transform: translateY(-1px);
}

.btn-sm {
  padding: 10px 20px;
  border-radius: 20px;
}

.btn-lg {
  padding: 13px 32px;
  font-size: 16px;
}

.btn-block {
  display: flex;
  width: 100%;
  padding: 13px 16px;
}

/* ===== 顶部导航 ===== */
.nav {
  position: fixed;
  top: 28px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  width: 1050px;
  max-width: calc(100% - 24px);
  transition: top 0.3s ease;
}

.nav-capsule {
  display: flex;
  align-items: center;
  gap: 20px;
  width: 100%;
  height: 64px;
  padding: 0 18px 0 26px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-radius: 50px;
  box-shadow: var(--shadow-nav);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.nav-logo-img {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  object-fit: cover;
}

.nav-logo-text {
  font-size: 19px;
  font-weight: 800;
  color: var(--color-text);
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  flex: 1;
  justify-content: center;
  min-width: 0;
}

.nav-links li {
  flex-shrink: 0;
  white-space: nowrap;
}

.nav-links a {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  transition: color 0.2s;
  white-space: nowrap;
  display: inline-block;
}
.nav-links a:hover {
  color: var(--color-accent);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* 导航按钮加大加粗 */
.nav-actions .btn {
  font-size: 15px;
  font-weight: 600;
  padding: 12px 26px;
  border-radius: 22px;
}

/* 滚动后导航收缩 */
.nav.scrolled .nav-capsule {
  background: rgba(255, 255, 255, 0.95);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 184px 24px 80px;
  text-align: center;
  background: radial-gradient(
      ellipse at 50% 0%,
      #eef1ff 0%,
      #f7f9fc 40%,
      #ffffff 80%
    );
  overflow: hidden;
}

.hero-inner {
  max-width: 820px;
  margin: 0 auto;
}

.hero-title {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 17px;
  font-weight: 400;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 620px;
  margin: 0 auto 32px;
}

.hero-cta {
  margin-bottom: 56px;
}

.hero-stats {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 0 24px;
  border-right: 1px solid var(--color-border);
  min-width: 120px;
}
.stat-item:last-child {
  border-right: none;
}
.stat-item:first-child {
  border-right: 1px solid var(--color-border);
}

.stat-num {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
}
.stat-desc {
  font-size: 13px;
  color: var(--color-text-muted);
}
.stat-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
}

.hero-wave {
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 80px;
  background: linear-gradient(to bottom, transparent, var(--color-white));
}

/* ===== 通用区块 ===== */
.section {
  padding: 80px 0;
}

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

.section-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}

.section-desc {
  font-size: 15px;
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===== 场景落地 ===== */
.scenarios {
  background: var(--color-white);
}

.scenario-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.scenario-tab {
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-bg);
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all 0.2s;
}
.scenario-tab:hover {
  color: var(--color-text);
}
.scenario-tab.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.scenario-panel {
  display: none;
}
.scenario-panel.active {
  display: block;
  animation: fadeUp 0.4s ease;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.scenario-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: 48px;
}

.scenario-visual {
  display: flex;
  justify-content: center;
}

.scenario-screen {
  width: 100%;
  max-width: 420px;
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-soft);
  min-height: 280px;
}

/* 文件夹模拟 */
.scenario-screen-folders {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.folder-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  transition: transform 0.2s;
}
.folder-row:hover {
  transform: translateX(4px);
}
.folder-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.icon-blue { background: #e0e7ff; }
.icon-purple { background: #ede9fe; }
.icon-green { background: #dcfce7; }
.icon-orange { background: #ffedd5; }
.folder-icon span {
  width: 18px;
  height: 14px;
  background: #fff;
  border-radius: 2px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.folder-text {
  display: flex;
  flex-direction: column;
  font-size: 14px;
  font-weight: 500;
}
.folder-text .muted {
  font-size: 12px;
  color: var(--color-text-muted);
  font-weight: 400;
}

/* 数据图表模拟 */
.scenario-screen-data {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.chart-bars {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  height: 160px;
  padding-top: 20px;
}
.bar {
  flex: 1;
  height: var(--h);
  background: linear-gradient(to top, #4d6dff, #8b5cf6);
  border-radius: 6px 6px 0 0;
  animation: barGrow 0.8s ease;
}
@keyframes barGrow {
  from { height: 0; }
}
.chart-line {
  height: 2px;
  background: var(--color-border);
}
.chart-tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.chart-tags span {
  font-size: 12px;
  padding: 4px 10px;
  background: var(--color-bg);
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
}

/* 流程模拟 */
.scenario-screen-flow {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.flow-step {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
}
.flow-step.flow-final {
  background: #0f172a;
  color: #fff;
}
.flow-num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.flow-final .flow-num {
  background: #fff;
  color: var(--color-primary);
}
.flow-arrow {
  width: 2px;
  height: 14px;
  background: var(--color-border);
  margin-left: 23px;
}

.scenario-content {
  padding: 8px 0;
}

.scenario-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
}

.scenario-lead {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
}
.feature-list strong {
  font-weight: 600;
  color: var(--color-text);
}
.feature-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
  margin-top: 7px;
  flex-shrink: 0;
}

/* ===== 智能执行 ===== */
.capabilities {
  background: var(--color-bg);
}

.cap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.cap-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s, box-shadow 0.2s;
}
.cap-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(15, 23, 42, 0.08);
}

.cap-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 26px;
}
.cap-icon-easy { background: #fef3c7; }
.cap-icon-expand { background: #e0e7ff; }
.cap-icon-safe { background: #dcfce7; }

.cap-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 10px;
}

.cap-desc {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===== 企业版 ===== */
.enterprise {
  background: var(--color-white);
}

.enterprise-sub {
  text-align: center;
  font-size: 15px;
  color: var(--color-text);
  font-weight: 500;
  margin-bottom: 20px;
}
.enterprise-cta {
  text-align: center;
  margin-bottom: 48px;
}

.enterprise-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 56px;
}

.ent-feature {
  text-align: center;
  padding: 28px 20px;
  background: var(--color-bg);
  border-radius: var(--radius-md);
}
.ent-feature-icon {
  font-size: 32px;
  margin-bottom: 12px;
}
.ent-feature h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
}

.enterprise-block {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  padding: 48px 40px;
  background: linear-gradient(135deg, #0f172a, #1e293b);
  border-radius: var(--radius-lg);
  color: #fff;
}

.ent-block-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 24px;
}

.ent-tags {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.ent-tag {
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
}

.ent-block-cta {
  display: flex;
  justify-content: center;
  gap: 12px;
}
.enterprise-block .btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.4);
}
.enterprise-block .btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* ===== 价格方案 ===== */
.pricing {
  background: var(--color-bg);
}

.pricing-tabs {
  display: flex;
  justify-content: center;
  gap: 4px;
  margin-bottom: 40px;
  padding: 4px;
  background: #e8ebf2;
  border-radius: var(--radius-pill);
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
}
.pricing-tab {
  padding: 10px 28px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
  background: transparent;
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all 0.2s;
}
.pricing-tab.active {
  background: var(--color-white);
  color: var(--color-text);
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.pricing-grid {
  display: none;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.pricing-grid.active {
  display: grid;
}

#pricingEnterprise {
  grid-template-columns: 1fr;
  max-width: 560px;
  margin: 0 auto;
}

.price-card {
  position: relative;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s, box-shadow 0.2s;
}
.price-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.price-card-highlight {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-card);
}

.price-card-wide {
  grid-column: 1 / -1;
}

.price-badge {
  position: absolute;
  top: 0;
  right: 24px;
  background: var(--color-primary);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 0 0 8px 8px;
}

.price-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

.price-amount {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.1;
  margin-bottom: 6px;
}
.price-amount-text {
  font-size: 24px;
}
.price-cur {
  display: inline-block;
  font-size: 18px;
  font-weight: 600;
  line-height: 1;
  vertical-align: 6px;
  margin-right: 2px;
}
.price-unit {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
}

.price-sub {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}
.price-sub strong {
  color: var(--color-text);
  font-weight: 700;
}

.price-points {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  padding: 8px 0 12px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.price-features {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
  flex: 1;
}
.price-features li {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.6;
  padding-left: 20px;
  position: relative;
}
.price-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-green);
  font-weight: 700;
}
.price-features a {
  color: var(--color-accent);
}
.price-features a:hover {
  text-decoration: underline;
}

/* ===== 生态与合作 ===== */
.ecosystem {
  background: var(--color-white);
}

.eco-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 40px;
}
.eco-tab {
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-bg);
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all 0.2s;
}
.eco-tab.active {
  background: var(--color-primary);
  color: #fff;
}

.eco-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 56px;
}
.eco-card {
  background: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  transition: transform 0.2s;
}
.eco-card:hover {
  transform: translateY(-4px);
}
.eco-icon {
  font-size: 36px;
  margin-bottom: 16px;
}
.eco-card-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}
.eco-card-desc {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.eco-partners {
  background: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 32px;
  overflow: hidden;
}
.eco-partners-label {
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}
.partners-marquee {
  overflow: hidden;
  position: relative;
}
.partners-marquee::before,
.partners-marquee::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 80px;
  z-index: 2;
  pointer-events: none;
}
.partners-marquee::before {
  left: 0;
  background: linear-gradient(to right, var(--color-bg), transparent);
}
.partners-marquee::after {
  right: 0;
  background: linear-gradient(to left, var(--color-bg), transparent);
}
.partners-track {
  display: flex;
  gap: 40px;
  animation: marquee 20s linear infinite;
  width: fit-content;
}
.partner {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-muted);
  white-space: nowrap;
}
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ===== 深入了解 ===== */
.learn {
  background: var(--color-bg);
}

.learn-tabs {
  display: flex;
  justify-content: center;
  gap: 4px;
  margin-bottom: 32px;
  padding: 4px;
  background: #e8ebf2;
  border-radius: var(--radius-pill);
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
}
.learn-tab {
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
  background: transparent;
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all 0.2s;
}
.learn-tab.active {
  background: var(--color-white);
  color: var(--color-text);
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.learn-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 760px;
  margin: 0 auto;
}
.learn-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s, box-shadow 0.2s;
}
.learn-card:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-card);
}
.learn-card-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}
.learn-card-desc {
  font-size: 14px;
  color: var(--color-text-muted);
}
.learn-arrow {
  font-size: 22px;
  color: var(--color-text-muted);
  transition: transform 0.2s;
}
.learn-card:hover .learn-arrow {
  transform: translateX(4px);
  color: var(--color-text);
}

/* ===== 下载 CTA ===== */
.download-cta {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #312e81 100%);
  color: #fff;
  text-align: center;
}
.download-inner {
  max-width: 640px;
  margin: 0 auto;
}
.download-title {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 12px;
}
.download-sub {
  font-size: 15px;
  color: rgba(255,255,255,0.7);
  margin-bottom: 36px;
}
.download-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
}
.download-cta .btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.4);
}
.download-cta .btn-outline:hover {
  background: rgba(255,255,255,0.1);
}
.download-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
}
.qr-box {
  width: 128px;
  height: 128px;
  background: #fff;
  border-radius: var(--radius-md);
  padding: 12px;
}
.qr-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 4px;
}
.qr-text {
  font-size: 13px;
  color: rgba(255,255,255,0.8);
}
.download-foot {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--color-bg);
  padding: 56px 0 0;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 48px;
  padding-bottom: 40px;
}
.footer-logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
}
.footer-tagline {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 8px;
}
.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.footer-col h5 {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 14px;
}
.footer-col a {
  display: block;
  font-size: 13px;
  color: var(--color-text-muted);
  padding: 6px 0;
  transition: color 0.2s;
}
.footer-col a:hover {
  color: var(--color-text);
}
.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 20px 0;
}
.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--color-text-muted);
}
.footer-bottom-inner a:hover {
  color: var(--color-text);
}
.footer-warn {
  margin-left: 8px;
}

/* ===== 响应式 ===== */
@media (max-width: 1100px) {
  .nav-links {
    display: none;
  }
  .nav {
    max-width: 440px;
  }
  .hero-title {
    font-size: 32px;
  }
  .hero-subtitle {
    font-size: 15px;
  }
  .hero-stats {
    gap: 12px;
  }
  .stat-item {
    min-width: 90px;
    padding: 0 12px;
  }
  .scenario-grid {
    grid-template-columns: 1fr;
    padding: 32px 24px;
  }
  .cap-grid {
    grid-template-columns: 1fr;
  }
  .enterprise-features {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: 1fr 1fr;
  }
  .eco-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-inner {
    grid-template-columns: 1fr;
  }
  .section {
    padding: 56px 0;
  }
  .section-title {
    font-size: 26px;
  }
  .download-title {
    font-size: 30px;
  }
  .download-actions {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 560px) {
  .nav {
    max-width: 320px;
    top: 16px;
  }
  .nav-actions .btn-outline {
    display: none;
  }
  .hero {
    padding: 140px 16px 56px;
  }
  .hero-title {
    font-size: 26px;
  }
  .hero-stats {
    flex-direction: column;
    gap: 16px;
  }
  .stat-item {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 16px;
  }
  .stat-item:last-child {
    border-bottom: none;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .enterprise-features,
  .eco-grid {
    grid-template-columns: 1fr;
  }
  .enterprise-block {
    padding: 32px 20px;
  }
  .ent-block-cta {
    flex-direction: column;
  }
}

/* ===== 下载弹窗 ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}
.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}
.modal-box {
  position: relative;
  width: 90%;
  max-width: 440px;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 40px 32px 28px;
  text-align: center;
  transform: translateY(20px);
  transition: transform 0.25s ease;
  box-shadow: 0 20px 80px rgba(0, 0, 0, 0.2);
}
.modal-overlay.active .modal-box {
  transform: translateY(0);
}
.modal-close {
  position: absolute;
  top: 14px;
  right: 18px;
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  font-size: 24px;
  line-height: 1;
  color: var(--color-text-muted);
  cursor: pointer;
  border-radius: 50%;
  transition: background 0.2s, color 0.2s;
}
.modal-close:hover {
  background: var(--color-bg);
  color: var(--color-text);
}
.modal-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}
.modal-sub {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 28px;
}
.modal-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 28px;
}
.modal-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 14px;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  transition: transform 0.2s, box-shadow 0.2s;
}
.modal-option:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
}
.modal-option-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: #1a1a1a;
  position: relative;
  flex-shrink: 0;
}
.modal-option-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 16px;
  height: 16px;
  background: #fff;
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}
.modal-option-icon-win {
  background: #1a5fb4;
}
.modal-option-icon-win::after {
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
  width: 14px;
  height: 14px;
}
.modal-option-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.modal-option-text strong {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
}
.modal-option-text span {
  font-size: 12px;
  color: var(--color-text-muted);
}
.modal-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}
.modal-qr .qr-box {
  width: 112px;
  height: 112px;
}
.modal-qr span {
  font-size: 13px;
  color: var(--color-text-muted);
}
.modal-foot {
  font-size: 12px;
  color: var(--color-text-muted);
}
.modal-link {
  color: var(--color-accent);
}
.modal-link:hover {
  text-decoration: underline;
}

/* ===== Toast 提示 ===== */
.toast-container {
  position: fixed;
  top: 28px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
  pointer-events: none;
}
.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 280px;
  max-width: 420px;
  padding: 14px 20px;
  background: #0f172a;
  color: #fff;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  opacity: 0;
  transform: translateY(-16px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}
.toast.show {
  opacity: 1;
  transform: translateY(0);
}
.toast-icon {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
}
.toast-success .toast-icon {
  background: #22c55e;
  color: #fff;
}
.toast-info .toast-icon {
  background: #4f46e5;
  color: #fff;
}
.toast-warn .toast-icon {
  background: #f59e0b;
  color: #fff;
}