/* =========================================================
   肥猫云机场 - 全局样式表
   说明：全站共用一份样式文件，按区块划分，方便维护
   ========================================================= */

/* ---------- 1. 重置与基础样式 ---------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
}

/* ---------- 2. 全局变量 ---------- */
:root {
  /* 品牌色：靛蓝到紫罗兰的渐变，搭配琥珀色作为"猫"的暖色点缀 */
  --color-primary: #4f46e5;
  --color-primary-dark: #4338ca;
  --color-secondary: #7c3aed;
  --color-accent: #f59e0b;
  --color-accent-dark: #d97706;

  --gradient-brand: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  --gradient-warm: linear-gradient(135deg, #f59e0b 0%, #f97316 100%);
  --gradient-hero-bg: radial-gradient(
      circle at 15% 20%,
      rgba(79, 70, 229, 0.12),
      transparent 45%
    ),
    radial-gradient(circle at 85% 10%, rgba(124, 58, 237, 0.12), transparent 40%),
    radial-gradient(circle at 50% 90%, rgba(245, 158, 11, 0.08), transparent 40%);

  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-bg-dark: #0f172a;
  --color-text: #1e293b;
  --color-text-light: #64748b;
  --color-text-inverse: #f1f5f9;
  --color-border: #e2e8f0;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-full: 999px;

  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 48px rgba(79, 70, 229, 0.14);

  --container-width: 1160px;
}

/* ---------- 3. 通用工具类 ---------- */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  background: rgba(79, 70, 229, 0.08);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: 34px;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}

.section-head p {
  color: var(--color-text-light);
  font-size: 16px;
}

.text-gradient {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* 默认可见（无 JS 兜底），JS 加载后才会先隐藏再触发滚动淡入 */
.fade-in {
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.fade-ready {
  opacity: 0;
  transform: translateY(24px);
}

.fade-in.fade-ready.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 4. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-full);
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn-primary {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 24px 56px rgba(79, 70, 229, 0.22);
}

.btn-ghost {
  background: #fff;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 16px;
}

/* ---------- 5. 顶部导航 ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

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

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 19px;
  font-weight: 800;
  color: var(--color-text);
}

.nav-brand img {
  width: 36px;
  height: 36px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-light);
  padding: 8px 0;
  position: relative;
  transition: color 0.2s ease;
}

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

.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--gradient-brand);
  border-radius: var(--radius-full);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
}

.nav-toggle span {
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* ---------- 6. Hero 区块 ---------- */
.hero {
  position: relative;
  padding: 88px 0 80px;
  background: var(--gradient-hero-bg);
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 48px;
}

/* 网格子项默认 min-width:auto，会按图片等内容的原始尺寸撑开轨道导致横向溢出，
   这里显式允许其收缩到小于内容本身的宽度 */
.hero-content,
.hero-visual {
  min-width: 0;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  background: #fff;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.2);
}

.hero h1 {
  font-size: 48px;
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero p.lead {
  font-size: 17px;
  color: var(--color-text-light);
  max-width: 520px;
  margin-bottom: 34px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  margin-bottom: 44px;
}

.hero-stats {
  display: flex;
  gap: 40px;
}

.hero-stats .stat b {
  display: block;
  font-size: 26px;
  font-weight: 800;
  color: var(--color-text);
}

.hero-stats .stat span {
  font-size: 13px;
  color: var(--color-text-light);
}

.hero-visual {
  position: relative;
}

.hero-visual img {
  width: 100%;
  filter: drop-shadow(0 30px 60px rgba(79, 70, 229, 0.18));
}

.hero-visual .float-card {
  position: absolute;
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  animation: floaty 4.5s ease-in-out infinite;
}

.hero-visual .float-card svg {
  width: 22px;
  height: 22px;
}

.hero-visual .card-top {
  top: 6%;
  left: -6%;
  animation-delay: 0.2s;
}

.hero-visual .card-bottom {
  bottom: 8%;
  right: -4%;
  animation-delay: 1s;
}

@keyframes floaty {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-12px);
  }
}

/* ---------- 7. Logo 墙 / 支持平台 ---------- */
.platform-strip {
  padding: 36px 0;
  border-bottom: 1px solid var(--color-border);
}

.platform-strip .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  min-width: 0;
}

.platform-strip span.label {
  font-size: 13px;
  color: var(--color-text-light);
  font-weight: 600;
}

.platform-icons {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.platform-icons .platform-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-light);
}

.platform-icons svg {
  width: 20px;
  height: 20px;
}

/* ---------- 8. 功能卡片网格 ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-icon svg {
  width: 26px;
  height: 26px;
  stroke: #fff;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14.5px;
  color: var(--color-text-light);
}

/* ---------- 9. 节点覆盖 ---------- */
.node-section {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: center;
}

.node-section > div {
  min-width: 0;
}

.node-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 28px;
}

.node-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: 14px;
  font-weight: 600;
}

.node-list li .flag {
  font-size: 18px;
}

.node-list li .count {
  margin-left: auto;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(79, 70, 229, 0.08);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

/* ---------- 10. 使用场景 ---------- */
.usecase-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}

.usecase-card {
  text-align: center;
  padding: 30px 16px;
  border-radius: var(--radius-md);
  background: #fff;
  border: 1px solid var(--color-border);
}

.usecase-card .emoji {
  font-size: 30px;
  margin-bottom: 14px;
}

.usecase-card h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
}

.usecase-card p {
  font-size: 13px;
  color: var(--color-text-light);
}

/* ---------- 11. 步骤 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}

.step-card {
  position: relative;
  padding: 32px 24px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.step-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-brand);
  color: #fff;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.step-card h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.step-card p {
  font-size: 13.5px;
  color: var(--color-text-light);
}

/* ---------- 12. 定价卡片 ---------- */
.pricing-toggle {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 14px;
  margin-bottom: 48px;
}

.pricing-toggle .switch {
  width: 52px;
  height: 28px;
  border-radius: var(--radius-full);
  background: var(--color-border);
  position: relative;
  cursor: pointer;
  transition: background 0.25s ease;
}

.pricing-toggle .switch::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #fff;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease;
}

.pricing-toggle .switch.on {
  background: var(--gradient-brand);
}

.pricing-toggle .switch.on::after {
  transform: translateX(24px);
}

.pricing-toggle .save-tag {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-accent-dark);
  background: rgba(245, 158, 11, 0.12);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  align-items: stretch;
}

.price-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.price-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.price-card.is-featured {
  background: var(--color-bg-dark);
  color: var(--color-text-inverse);
  border-color: transparent;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.price-card.is-featured .price-tag,
.price-card.is-featured p {
  color: rgba(241, 245, 249, 0.7);
}

.featured-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-warm);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 5px 16px;
  border-radius: var(--radius-full);
}

.price-name {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}

.price-tag {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 18px;
}

.price-amount {
  font-size: 38px;
  font-weight: 800;
  margin-bottom: 4px;
}

.price-amount span {
  font-size: 15px;
  font-weight: 500;
  opacity: 0.6;
}

.price-original {
  font-size: 13px;
  color: var(--color-text-light);
  text-decoration: line-through;
  margin-bottom: 22px;
}

.price-features {
  margin: 22px 0 28px;
  flex: 1;
}

.price-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  padding: 8px 0;
}

.price-features li svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  stroke: var(--color-accent);
}

/* ---------- 13. FAQ 手风琴 ---------- */
.faq-list {
  max-width: 760px;
  margin: 0 auto;
}

.faq-group + .faq-group {
  margin-top: 44px;
}

.faq-group h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  background: #fff;
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  font-size: 15px;
  font-weight: 600;
  text-align: left;
}

.faq-question .icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  position: relative;
  margin-left: 16px;
}

.faq-question .icon::before,
.faq-question .icon::after {
  content: "";
  position: absolute;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform 0.25s ease;
}

.faq-question .icon::before {
  width: 14px;
  height: 2px;
  top: 9px;
  left: 3px;
}

.faq-question .icon::after {
  width: 2px;
  height: 14px;
  top: 3px;
  left: 9px;
}

.faq-item.is-open .faq-question .icon::after {
  transform: rotate(90deg);
  opacity: 0;
}

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

.faq-answer p {
  padding: 0 22px 20px;
  font-size: 14px;
  color: var(--color-text-light);
}

/* ---------- 14. 教程 Tabs ---------- */
.tutorial-tabs {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: #fff;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-light);
  transition: all 0.2s ease;
}

.tab-btn.active {
  background: var(--gradient-brand);
  color: #fff;
  border-color: transparent;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
  animation: fadeIn 0.35s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.tutorial-steps {
  max-width: 720px;
  margin: 0 auto;
  counter-reset: tstep;
}

.tutorial-step {
  display: flex;
  gap: 20px;
  padding: 22px 0;
  border-bottom: 1px dashed var(--color-border);
}

.tutorial-step:last-child {
  border-bottom: none;
}

.tutorial-step .num {
  counter-increment: tstep;
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  color: var(--color-primary);
}

/* 步骤序号通过 CSS 计数器自动生成，无需在 HTML 中手写数字 */
.tutorial-step .num::before {
  content: counter(tstep);
}

.tutorial-step h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}

.tutorial-step p {
  font-size: 14px;
  color: var(--color-text-light);
}

.tutorial-step code {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 13px;
  color: var(--color-primary-dark);
}

/* ---------- 15. 通用内容页 Banner ---------- */
.page-banner {
  padding: 64px 0 56px;
  text-align: center;
  background: var(--gradient-hero-bg);
}

.page-banner .eyebrow {
  margin-bottom: 14px;
}

.page-banner h1 {
  font-size: 38px;
  font-weight: 800;
  margin-bottom: 14px;
}

.page-banner p {
  color: var(--color-text-light);
  max-width: 560px;
  margin: 0 auto;
}

.breadcrumb {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 18px;
}

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

/* ---------- 16. 关于我们 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 40px;
}

.value-card {
  padding: 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: #fff;
}

.value-card .num {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent-dark);
  margin-bottom: 10px;
}

.timeline {
  max-width: 720px;
  margin: 56px auto 0;
  border-left: 2px solid var(--color-border);
  padding-left: 28px;
}

.timeline-item {
  position: relative;
  padding-bottom: 36px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gradient-brand);
}

.timeline-item .date {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.stat-band {
  background: var(--color-bg-dark);
  border-radius: var(--radius-lg);
  padding: 48px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 56px;
}

.stat-band .stat {
  text-align: center;
}

.stat-band .stat b {
  display: block;
  font-size: 32px;
  font-weight: 800;
  color: #fff;
}

.stat-band .stat span {
  font-size: 13px;
  color: rgba(241, 245, 249, 0.6);
}

/* ---------- 17. 联系我们 ---------- */
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-methods {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

.contact-method {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: #fff;
}

.contact-method .icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-method .icon-wrap svg {
  width: 22px;
  height: 22px;
  stroke: var(--color-primary);
}

.contact-method h4 {
  font-size: 15px;
  font-weight: 700;
}

.contact-method p {
  font-size: 13px;
  color: var(--color-text-light);
}

.contact-form {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.form-row {
  margin-bottom: 18px;
}

.form-row label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
}

.form-row input,
.form-row textarea,
.form-row select {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  font-size: 14px;
  transition: border-color 0.2s ease;
}

.form-row input:focus,
.form-row textarea:focus,
.form-row select:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form-msg {
  margin-top: 14px;
  font-size: 13px;
  font-weight: 600;
  color: #16a34a;
  display: none;
}

.form-msg.show {
  display: block;
}

/* ---------- 18. 底部 CTA ---------- */
.cta-band {
  background: var(--gradient-brand);
  border-radius: var(--radius-lg);
  padding: 64px 48px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cta-band h2 {
  font-size: 30px;
  font-weight: 800;
  margin-bottom: 14px;
}

.cta-band p {
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 30px;
}

.cta-band .btn-ghost {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.3);
}

.cta-band .btn-primary {
  background: #fff;
  color: var(--color-primary);
  box-shadow: none;
}

/* ---------- 19. 页脚 ---------- */
.footer {
  background: var(--color-bg-dark);
  color: rgba(241, 245, 249, 0.7);
  padding: 72px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(4, 1fr);
  gap: 32px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
}

.footer-brand img {
  width: 30px;
  height: 30px;
}

.footer-col h5 {
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.04em;
  margin-bottom: 18px;
}

.footer-col li {
  margin-bottom: 12px;
  font-size: 14px;
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 28px;
  font-size: 13px;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom .disclaimer {
  max-width: 720px;
  font-size: 12px;
  opacity: 0.6;
  line-height: 1.6;
}

/* ---------- 20. 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }
  .hero-visual {
    order: -1;
    max-width: 420px;
    margin: 0 auto;
  }
  .feature-grid,
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .usecase-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }
  .node-section {
    grid-template-columns: 1fr;
  }
  .about-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stat-band {
    grid-template-columns: repeat(2, 1fr);
  }
  .contact-wrap {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* 导航栏在 768~960px 之间空间不足以容纳完整链接+按钮，会导致文字被迫换行，
   因此单独用更宽的断点提前切换为汉堡菜单，而不是和下面其它区块共用 768px */
@media (max-width: 960px) {
  .nav-links,
  .nav-actions .btn-ghost {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .header.is-open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    padding: 20px 24px;
    gap: 18px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
  }
}

@media (max-width: 768px) {
  .hide-mobile {
    display: none;
  }
  /* 小屏下浮动徽章容易顶出视口造成横向溢出，直接隐藏这一装饰元素 */
  .hero-visual .float-card {
    display: none;
  }

  .hero h1 {
    font-size: 34px;
  }
  .hero-cta {
    flex-direction: column;
  }
  .hero-stats {
    gap: 24px;
  }
  .feature-grid,
  .pricing-grid,
  .usecase-grid,
  .steps,
  .about-grid {
    grid-template-columns: 1fr;
  }
  .section {
    padding: 64px 0;
  }
  .section-head h2,
  .page-banner h1 {
    font-size: 26px;
  }
  .stat-band {
    grid-template-columns: repeat(2, 1fr);
    padding: 32px 20px;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .cta-band {
    padding: 48px 24px;
  }
  .platform-strip .container {
    justify-content: center;
    text-align: center;
  }
}